src/ndbapi/NdbQueryBuilder.cpp

/*
   Copyright (c) 2011, 2021, Oracle and/or its affiliates.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#include <ndb_global.h>
#include <NdbDictionary.hpp>
#include "NdbIndexScanOperation.hpp"
#include "NdbQueryBuilder.hpp"
#include "NdbQueryBuilderImpl.hpp"
#include <Vector.hpp>
#include "signaldata/QueryTree.hpp"

#include "NdbDictionaryImpl.hpp"
#include <NdbRecord.hpp>
#include "AttributeHeader.hpp"
#include "NdbOut.hpp"
#include <NdbInterpretedCode.hpp>

/**
 * Implementation of all QueryBuilder objects are hidden from
 * both the API interface and other internals in the NDBAPI using the
 * pimpl idiom.
 *
 * The object hierarch visible through the interface has its 'Impl'
 * counterparts inside this module. Some classes are
 * even subclassed further as part of the implementation.
 * (Particular the ConstOperant in order to implement multiple datatypes)
 *
 * In order to avoid allocating both an interface object and its particular
 * Impl object, all 'final' Impl objects 'has a' interface object
 * which is accessible through the virtual method ::getInterface.
 *
 * ::getImpl() methods has been defined for convenient access
 * to all available Impl classes.
 *
 */

// For debugging purposes. Enable to print query tree graph to ndbout.
static const bool doPrintQueryTree = false;

/* Various error codes that are not specific to NdbQuery. */
static const int Err_MemoryAlloc = 4000;
static const int Err_FunctionNotImplemented = 4003;
static const int Err_UnknownColumn = 4004;
static const int Err_FinaliseNotCalled = 4519;

static void
setErrorCode(NdbQueryBuilderImpl* qb, int aErrorCode)
{ qb->setErrorCode(aErrorCode);
}

static void
setErrorCode(NdbQueryBuilder* qb, int aErrorCode)
{ qb->getImpl().setErrorCode(aErrorCode);
}


//////////////////////////////////////////////////////////////////
// Convenient macro for returning specific errorcodes if
// 'cond' does not evaluate to true.
//////////////////////////////////////////////////////////////////
#define returnErrIf(cond,err)		\
  if (unlikely((cond)))			\
  { ::setErrorCode(this,err);		\
    return NULL;			\
  }


//////////////////////////////////////////////
// Implementation of NdbQueryOperand interface
//
// The common baseclass 'class NdbQueryOperandImpl',
// and its 'const', 'linked' and 'param' subclasses are
// defined in "NdbQueryBuilderImpl.hpp"
// The 'const' operand subclass is a pure virtual baseclass
// which has different type specific subclasses defined below:
//////////////////////////////////////////////////////////////

//////////////////////////////////////////////////
// Implements different const datatypes by further
// subclassing of the baseclass NdbConstOperandImpl.
//////////////////////////////////////////////////
class NdbInt64ConstOperandImpl : public NdbConstOperandImpl
{
public:
  explicit NdbInt64ConstOperandImpl (Int64 value) :
    NdbConstOperandImpl(),
    m_value(value) {}

private:
  int convertInt8();
  int convertUint8();
  int convertInt16();
  int convertUint16();
  int convertInt24();
  int convertUint24();
  int convertInt32();
  int convertUint32();
  int convertInt64();
  int convertUint64();

  const Int64 m_value;
};

class NdbDoubleConstOperandImpl : public NdbConstOperandImpl
{
public:
  explicit NdbDoubleConstOperandImpl (double value) :
    NdbConstOperandImpl(),
    m_value(value) {}

private:
  int convertDouble();
  int convertFloat();
private:
  const double m_value;
};

class NdbCharConstOperandImpl : public NdbConstOperandImpl
{
public:
  explicit NdbCharConstOperandImpl (const char* value) :
    NdbConstOperandImpl(), m_value(value) {}

private:
  int convertChar();
  int convertVChar();
//int convertLVChar();
private:
  const char* const m_value;
};

class NdbGenericConstOperandImpl : public NdbConstOperandImpl
{
public:
  explicit NdbGenericConstOperandImpl (const void* value,
                                       Uint32 len)
  : NdbConstOperandImpl(),
    m_value(value),
    m_len(len)
  {}

private:
  int convert2ColumnType();

  const void* const m_value;
  const Uint32 m_len;
};

////////////////////////////////////////////////
// Implementation of NdbQueryOperation interface
////////////////////////////////////////////////

// Common Baseclass 'class NdbQueryOperationDefImpl' is
// defined in "NdbQueryBuilderImpl.hpp"

class NdbQueryLookupOperationDefImpl : public NdbQueryOperationDefImpl
{
  friend class NdbQueryBuilder;  // Allow privat access from builder interface

public:
  virtual const NdbQueryOperandImpl* const* getKeyOperands() const
  { return m_keys; }

protected:

  explicit NdbQueryLookupOperationDefImpl (
                           const NdbTableImpl& table,
                           const NdbQueryOperand* const keys[],
                           const NdbQueryOptionsImpl& options,
                           const char* ident,
                           Uint32      opNo,
                           Uint32      internalOpNo,
                           int& error);

  virtual const NdbQueryLookupOperationDef& getInterface() const
  { return m_interface; }

  // Append pattern for creating lookup key to serialized code
  Uint32 appendKeyPattern(Uint32Buffer& serializedDef) const;

  virtual bool isScanOperation() const
  { return false; }

protected:
  NdbQueryLookupOperationDef m_interface;
  NdbQueryOperandImpl* m_keys[MAX_ATTRIBUTES_IN_INDEX+1];

}; // class NdbQueryLookupOperationDefImpl

class NdbQueryPKLookupOperationDefImpl : public NdbQueryLookupOperationDefImpl
{
  friend class NdbQueryBuilder;  // Allow privat access from builder interface

public:
  virtual int serializeOperation(Uint32Buffer& serializedDef);

private:

  explicit NdbQueryPKLookupOperationDefImpl (
                           const NdbTableImpl& table,
                           const NdbQueryOperand* const keys[],
                           const NdbQueryOptionsImpl& options,
                           const char* ident,
                           Uint32      opNo,
                           Uint32      internalOpNo,
                           int& error)
    : NdbQueryLookupOperationDefImpl(table, keys, options, ident, opNo,
                                     internalOpNo, error)
  {}

  virtual NdbQueryOperationDef::Type getType() const
  { return NdbQueryOperationDef::PrimaryKeyAccess; }

}; // class NdbQueryPKLookupOperationDefImpl


class NdbQueryIndexOperationDefImpl : public NdbQueryLookupOperationDefImpl
{
  friend class NdbQueryBuilder;  // Allow privat access from builder interface

public:
  virtual const NdbIndexImpl* getIndex() const
  { return &m_index; }

  virtual int serializeOperation(Uint32Buffer& serializedDef);

private:

  explicit NdbQueryIndexOperationDefImpl (
                           const NdbIndexImpl& index,
                           const NdbTableImpl& table,
                           const NdbQueryOperand* const keys[],
                           const NdbQueryOptionsImpl& options,
                           const char* ident,
                           Uint32      opNo,
                           Uint32      internalOpNo,
                           int& error)
    // Add 1 to 'id' since index lookup is serialized as two operations.
    : NdbQueryLookupOperationDefImpl(table, keys, options, ident, opNo,
                                     internalOpNo+1, error),
    m_index(index)
  {}

  virtual NdbQueryOperationDef::Type getType() const
  { return NdbQueryOperationDef::UniqueIndexAccess; }

private:
  const NdbIndexImpl& m_index;

}; // class NdbQueryIndexOperationDefImpl


class NdbQueryTableScanOperationDefImpl : public NdbQueryScanOperationDefImpl
{
  friend class NdbQueryBuilder;  // Allow privat access from builder interface

public:
  virtual int serializeOperation(Uint32Buffer& serializedDef);

  virtual const NdbQueryTableScanOperationDef& getInterface() const
  { return m_interface; }

  virtual NdbQueryOperationDef::Type getType() const
  { return NdbQueryOperationDef::TableScan; }

private:

  explicit NdbQueryTableScanOperationDefImpl (
                           const NdbTableImpl& table,
                           const NdbQueryOptionsImpl& options,
                           const char* ident,
                           Uint32      opNo,
                           Uint32      internalOpNo,
                           int& error)
    : NdbQueryScanOperationDefImpl(table, options, ident, opNo,
                                   internalOpNo, error),
      m_interface(*this)
  {}

  NdbQueryTableScanOperationDef m_interface;

}; // class NdbQueryTableScanOperationDefImpl


///////////////////////////////////////////////////
/////// End 'Impl' class declarations /////////////
///////////////////////////////////////////////////

NdbQueryDef::NdbQueryDef(NdbQueryDefImpl& impl) : m_impl(impl)
{}
NdbQueryDef::~NdbQueryDef()
{}

Uint32
NdbQueryDef::getNoOfOperations() const
{ return m_impl.getNoOfOperations();
}

const NdbQueryOperationDef*
NdbQueryDef::getQueryOperation(Uint32 index) const
{ return &m_impl.getQueryOperation(index).getInterface();
}

const NdbQueryOperationDef*
NdbQueryDef::getQueryOperation(const char* ident) const
{ const NdbQueryOperationDefImpl *opDef = m_impl.getQueryOperation(ident);
  return (opDef!=NULL) ? &opDef->getInterface() : NULL;
}

bool
NdbQueryDef::isScanQuery() const
{ return m_impl.isScanQuery();
}

NdbQueryDef::QueryType
NdbQueryDef::getQueryType() const
{ return m_impl.getQueryType();
}

NdbQueryDefImpl&
NdbQueryDef::getImpl() const{
  return m_impl;
}

void
NdbQueryDef::destroy() const
{
  delete &getImpl();
}

void
NdbQueryDef::print() const
{
  m_impl.getQueryOperation(0U)
    .printTree(0, NdbQueryOperationDefImpl::SiblingMask());
}

/*************************************************************************
 * Glue layer between NdbQueryOperand interface and its Impl'ementation.
 ************************************************************************/

NdbQueryOperand::NdbQueryOperand(NdbQueryOperandImpl& impl) : m_impl(impl)
{}
NdbConstOperand::NdbConstOperand(NdbQueryOperandImpl& impl) : NdbQueryOperand(impl)
{}
NdbParamOperand::NdbParamOperand(NdbQueryOperandImpl& impl) : NdbQueryOperand(impl)
{}
NdbLinkedOperand::NdbLinkedOperand(NdbQueryOperandImpl& impl) : NdbQueryOperand(impl)
{}

// D'tors
NdbQueryOperand::~NdbQueryOperand()
{}
NdbConstOperand::~NdbConstOperand()
{}
NdbParamOperand::~NdbParamOperand()
{}
NdbLinkedOperand::~NdbLinkedOperand()
{}

/**
 * Get'ers for NdbQueryOperand...Impl object.
 * Functions overridden to supply 'impl' casted to the correct '...OperandImpl' type
 * for each available interface class.
 */
inline NdbQueryOperandImpl&
NdbQueryOperand::getImpl() const
{ return m_impl;
}
inline static
NdbQueryOperandImpl& getImpl(const NdbQueryOperand& op)
{ return op.getImpl();
}
inline static
NdbConstOperandImpl& getImpl(const NdbConstOperand& op)
{ return static_cast<NdbConstOperandImpl&>(op.getImpl());
}
inline static
NdbParamOperandImpl& getImpl(const NdbParamOperand& op)
{ return static_cast<NdbParamOperandImpl&>(op.getImpl());
}
inline static
NdbLinkedOperandImpl& getImpl(const NdbLinkedOperand& op)
{ return static_cast<NdbLinkedOperandImpl&>(op.getImpl());
}

/**
 * BEWARE: Return 'NULL' Until the operand has been bound to an operation.
 */
const NdbDictionary::Column*
NdbQueryOperand::getColumn() const
{
  return ::getImpl(*this).getColumn();
}

const char*
NdbParamOperand::getName() const
{
  return ::getImpl(*this).getName();
}

Uint32
NdbParamOperand::getEnum() const
{
  return ::getImpl(*this).getParamIx();
}

/****************************************************************************
 * Implementation of NdbQueryOptions.
 * Because of the simplicity of this class, the implementation has *not*
 * been split into methods in the Impl class with a glue layer to the
 * outside interface.
 ****************************************************************************/
static NdbQueryOptionsImpl defaultOptions;

NdbQueryOptions::NdbQueryOptions()
: m_pimpl(&defaultOptions)
{}

NdbQueryOptions::~NdbQueryOptions()
{
  if (m_pimpl!=&defaultOptions)
    delete m_pimpl;
}

const NdbQueryOptionsImpl&
NdbQueryOptions::getImpl() const
{
  return *m_pimpl;
}

int
NdbQueryOptions::setOrdering(ScanOrdering ordering)
{
  if (m_pimpl==&defaultOptions)
  {
    m_pimpl = new NdbQueryOptionsImpl;
    if (unlikely(m_pimpl==0))
    {
      return Err_MemoryAlloc;
    }
  }
  m_pimpl->m_scanOrder = ordering;
  return 0;
}

int
NdbQueryOptions::setMatchType(MatchType matchType)
{
  if (m_pimpl==&defaultOptions)
  {
    m_pimpl = new NdbQueryOptionsImpl;
    if (unlikely(m_pimpl==0))
    {
      return Err_MemoryAlloc;
    }
  }
  m_pimpl->m_matchType = matchType;
  return 0;
}

int
NdbQueryOptions::setParent(const NdbQueryOperationDef* parent)
{
  if (m_pimpl==&defaultOptions)
  {
    m_pimpl = new NdbQueryOptionsImpl;
    if (unlikely(m_pimpl==0))
    {
      return Err_MemoryAlloc;
    }
  }
  m_pimpl->m_parent = &parent->getImpl();
  return 0;
}

int
NdbQueryOptions::setInterpretedCode(const NdbInterpretedCode& code)
{
  if (m_pimpl==&defaultOptions)
  {
    m_pimpl = new NdbQueryOptionsImpl;
    if (unlikely(m_pimpl==0))
    {
      return Err_MemoryAlloc;
    }
  }
  return m_pimpl->copyInterpretedCode(code);
}


NdbQueryOptionsImpl::~NdbQueryOptionsImpl()
{
  delete m_interpretedCode;
}

NdbQueryOptionsImpl::NdbQueryOptionsImpl(const NdbQueryOptionsImpl& src)
 : m_matchType(src.m_matchType),
   m_scanOrder(src.m_scanOrder),
   m_parent(src.m_parent),
   m_interpretedCode(NULL)
{
  if (src.m_interpretedCode)
  {
    copyInterpretedCode(*src.m_interpretedCode);
  }
}

/*
 * Make a deep copy, such that 'src' can be destroyed when this method
 * returns.
 */
int
NdbQueryOptionsImpl::copyInterpretedCode(const NdbInterpretedCode& src)
{
  /* Check the program's finalised */
  if (unlikely(!(src.m_flags & NdbInterpretedCode::Finalised)))
  {
    return Err_FinaliseNotCalled;  // NdbInterpretedCode::finalise() not called.
  }
  if (src.m_instructions_length == 0)
  {
    return 0;
  }

  NdbInterpretedCode* interpretedCode = new NdbInterpretedCode();
  if (unlikely(interpretedCode==NULL))
  {
    return Err_MemoryAlloc;
  }

  const int error = interpretedCode->copy(src);
  if (unlikely(error))
  {
    delete interpretedCode;
    return error;
  }

  /* Replace existing NdbInterpretedCode */
  if (m_interpretedCode)
    delete m_interpretedCode;

  m_interpretedCode = interpretedCode;
  return 0;
}


/****************************************************************************
 * Glue layer between NdbQueryOperationDef interface and its Impl'ementation.
 ****************************************************************************/
NdbQueryOperationDef::NdbQueryOperationDef(NdbQueryOperationDefImpl& impl) : m_impl(impl)
{}
NdbQueryLookupOperationDef::NdbQueryLookupOperationDef(NdbQueryOperationDefImpl& impl) : NdbQueryOperationDef(impl)
{}
NdbQueryScanOperationDef::NdbQueryScanOperationDef(NdbQueryOperationDefImpl& impl) : NdbQueryOperationDef(impl)
{}
NdbQueryTableScanOperationDef::NdbQueryTableScanOperationDef(NdbQueryOperationDefImpl& impl) : NdbQueryScanOperationDef(impl)
{}
NdbQueryIndexScanOperationDef::NdbQueryIndexScanOperationDef(NdbQueryOperationDefImpl& impl) : NdbQueryScanOperationDef(impl)
{}


// D'tors
NdbQueryOperationDef::~NdbQueryOperationDef()
{}
NdbQueryLookupOperationDef::~NdbQueryLookupOperationDef()
{}
NdbQueryScanOperationDef::~NdbQueryScanOperationDef()
{}
NdbQueryTableScanOperationDef::~NdbQueryTableScanOperationDef()
{}
NdbQueryIndexScanOperationDef::~NdbQueryIndexScanOperationDef()
{}

NdbQueryOperationDefImpl::~NdbQueryOperationDefImpl()
{
  // Unlink any parent and child refering this object
  if (m_parent != NULL)
  {
    m_parent->removeChild(this);
  }
  for (Uint32 i = 0; i<m_children.size(); i++)
  {
    assert(m_children[i]->m_parent == this);
    m_children[i]->m_parent = NULL;
  }
}

/**
 * Get'ers for QueryOperation...DefImpl object.
 * Functions overridden to supply 'impl' casted to the correct '...DefImpl' type
 * for each available interface class.
 */
NdbQueryOperationDefImpl&
NdbQueryOperationDef::getImpl() const
{ return m_impl;
}
inline static
NdbQueryOperationDefImpl& getImpl(const NdbQueryOperationDef& op)
{ return op.getImpl();
}
inline static
NdbQueryLookupOperationDefImpl& getImpl(const NdbQueryLookupOperationDef& op)
{ return static_cast<NdbQueryLookupOperationDefImpl&>(op.getImpl());
}
inline static
NdbQueryTableScanOperationDefImpl& getImpl(const NdbQueryTableScanOperationDef& op)
{ return static_cast<NdbQueryTableScanOperationDefImpl&>(op.getImpl());
}
inline static
NdbQueryIndexScanOperationDefImpl& getImpl(const NdbQueryIndexScanOperationDef& op)
{ return static_cast<NdbQueryIndexScanOperationDefImpl&>(op.getImpl());
}


Uint32
NdbQueryOperationDef::getOpNo() const
{
  return ::getImpl(*this).getOpNo();
}

Uint32
NdbQueryOperationDef::getNoOfParentOperations() const
{
  return ::getImpl(*this).getNoOfParentOperations();
}

const NdbQueryOperationDef*
NdbQueryOperationDef::getParentOperation(Uint32 i) const
{
  return &::getImpl(*this).getParentOperation(i).getInterface();
}

Uint32
NdbQueryOperationDef::getNoOfChildOperations() const
{
  return ::getImpl(*this).getNoOfChildOperations();
}

const NdbQueryOperationDef*
NdbQueryOperationDef::getChildOperation(Uint32 i) const
{
  return &::getImpl(*this).getChildOperation(i).getInterface();
}

const char*
NdbQueryOperationDef::getTypeName(Type type)
{
  switch(type)
  {
  case PrimaryKeyAccess:
    return "PrimaryKeyAccess";
  case UniqueIndexAccess:
    return "UniqueIndexAccess";
  case TableScan:
    return "TableScan";
  case OrderedIndexScan:
    return "OrderedIndexScan";
  default:
    return "<Invalid NdbQueryOperationDef::Type value>";
  }
}


NdbQueryOperationDef::Type
NdbQueryOperationDef::getType() const
{
  return ::getImpl(*this).getType();
}

const NdbDictionary::Table*
NdbQueryOperationDef::getTable() const
{
  return &::getImpl(*this).getTable();
}

const NdbDictionary::Index*
NdbQueryOperationDef::getIndex() const
{
  return ::getImpl(*this).getIndex();
}

/*******************************************
 * Implementation of NdbQueryBuilder factory
 ******************************************/
// Static method.
NdbQueryBuilder* NdbQueryBuilder::create()
{
  NdbQueryBuilderImpl* const impl = new NdbQueryBuilderImpl();
  if (likely (impl != NULL))
  {
    if((!ndb_join_pushdown(ndbGetOwnVersion())))
    {
      /* The SPJ code is present in releases where the SPJ feature is
       * not yet enabled.
       */
      impl->setErrorCode(Err_FunctionNotImplemented);
    }
    return &impl->m_interface;
  }
  else
  {
    return NULL;
  }
}

void NdbQueryBuilder::destroy()
{
  delete &m_impl;
}

NdbQueryBuilder::NdbQueryBuilder(NdbQueryBuilderImpl& impl)
: m_impl(impl)
{}

NdbQueryBuilder::~NdbQueryBuilder()
{}

inline NdbQueryBuilderImpl&
NdbQueryBuilder::getImpl() const
{ return m_impl;
}

const NdbError&
NdbQueryBuilder::getNdbError() const
{
  return m_impl.getNdbError();
}

//////////////////////////////////////////////////
// Implements different const datatypes by further
// subclassing of NdbConstOperand.
/////////////////////////////////////////////////
NdbConstOperand*
NdbQueryBuilder::constValue(const char* value)
{
  returnErrIf(value==0,QRY_REQ_ARG_IS_NULL);
  return static_cast<NdbConstOperand*>
    (m_impl.addOperand(new NdbCharConstOperandImpl(value)));
}

NdbConstOperand*
NdbQueryBuilder::constValue(const void* value, Uint32 len)
{
  returnErrIf(value == 0, QRY_REQ_ARG_IS_NULL);
  return static_cast<NdbConstOperand*>
    (m_impl.addOperand(new NdbGenericConstOperandImpl(value,len)));
}

NdbConstOperand*
NdbQueryBuilder::constValue(Int32 value)
{
  return static_cast<NdbConstOperand*>
    (m_impl.addOperand(new NdbInt64ConstOperandImpl(value)));
}

NdbConstOperand*
NdbQueryBuilder::constValue(Uint32 value)
{
  return static_cast<NdbConstOperand*>
    (m_impl.addOperand(new NdbInt64ConstOperandImpl(value)));
}

NdbConstOperand*
NdbQueryBuilder::constValue(Int64 value)
{
  return static_cast<NdbConstOperand*>
    (m_impl.addOperand(new NdbInt64ConstOperandImpl(value)));
}

NdbConstOperand*
NdbQueryBuilder::constValue(Uint64 value)
{
  return static_cast<NdbConstOperand*>
    (m_impl.addOperand(new NdbInt64ConstOperandImpl(value)));
}

NdbConstOperand*
NdbQueryBuilder::constValue(double value)
{
  return static_cast<NdbConstOperand*>
    (m_impl.addOperand(new NdbDoubleConstOperandImpl(value)));
}

NdbParamOperand*
NdbQueryBuilder::paramValue(const char* name)
{
  return static_cast<NdbParamOperand*>
    (m_impl.addOperand(new NdbParamOperandImpl(name,getImpl().m_paramCnt++)));
}

NdbLinkedOperand*
NdbQueryBuilder::linkedValue(const NdbQueryOperationDef* parent, const char* attr)
{
  // Required non-NULL arguments
  returnErrIf(parent==0 || attr==0, QRY_REQ_ARG_IS_NULL);
  NdbQueryOperationDefImpl& parentImpl = parent->getImpl();

  // Parent should be a OperationDef contained in this query builder context
  returnErrIf(!m_impl.contains(&parentImpl), QRY_UNKNOWN_PARENT);

  // 'attr' should refer a column from the underlying table in parent:
  const NdbColumnImpl* column = parentImpl.getTable().getColumn(attr);
  returnErrIf(column==0, Err_UnknownColumn); // Unknown column

  // Locate refered parrent column in parent operations SPJ projection list;
  // Add if not already present
  int error = 0;
  Uint32 colIx = parentImpl.addColumnRef(column, error);
  if (unlikely(error != 0))
  {
    m_impl.setErrorCode(error);
    return NULL;
  }

  return static_cast<NdbLinkedOperand*>
    (m_impl.addOperand(new NdbLinkedOperandImpl(parentImpl,colIx)));
}

// Check if there is at least one linked operand.
static bool hasLinkedOperand(const NdbQueryOperand* const keys[])
{
  int i = 0;
  while (keys[i] != NULL)
  {
    if (keys[i]->getImpl().getKind() == NdbQueryOperandImpl::Linked)
    {
      return true;
    }
    i++;
  }
  return false;
}

const NdbQueryLookupOperationDef*
NdbQueryBuilder::readTuple(const NdbDictionary::Table* table,    // Primary key lookup
                           const NdbQueryOperand* const keys[],  // Terminated by NULL element
                           const NdbQueryOptions* options,
                           const char* ident)
{
  int i;
  if (m_impl.hasError())
    return NULL;

  returnErrIf(table==0 || keys==0, QRY_REQ_ARG_IS_NULL);
  // All operations but the first one must depend on some other operation.
  returnErrIf(m_impl.m_operations.size() > 0 && !hasLinkedOperand(keys),
              QRY_UNKNOWN_PARENT);

  const NdbTableImpl& tableImpl = NdbTableImpl::getImpl(*table);

  // All column values being part of primary key should be specified:
  int keyfields = table->getNoOfPrimaryKeys();
  int colcount = table->getNoOfColumns();

  // Check: keys[] are specified for all fields in PK
  for (i=0; i<keyfields; ++i)
  {
    // A 'Key' value is undefined
    returnErrIf(keys[i]==NULL, QRY_TOO_FEW_KEY_VALUES);
  }
  // Check for propper NULL termination of keys[] spec
  returnErrIf(keys[keyfields]!=NULL, QRY_TOO_MANY_KEY_VALUES);

  int error = 0;
  NdbQueryPKLookupOperationDefImpl* op =
    new NdbQueryPKLookupOperationDefImpl(tableImpl,
                                       keys,
                                       options ? options->getImpl() : defaultOptions,
                                       ident,
                                       m_impl.m_operations.size(),
                                       m_impl.getNextInternalOpNo(),
                                       error);

  returnErrIf(m_impl.takeOwnership(op)!=0, Err_MemoryAlloc);
  returnErrIf(error!=0, error); // C'tor returned error, bailout

  Uint32 keyindex = 0;
  for (i=0; i<colcount; ++i)
  {
    const NdbColumnImpl *col = tableImpl.getColumn(i);
    if (col->getPrimaryKey())
    {
      assert (keyindex==col->m_keyInfoPos);
      int error = op->m_keys[col->m_keyInfoPos]->bindOperand(*col,*op);
      returnErrIf(error!=0, error);

      keyindex++;
      if (keyindex >= static_cast<Uint32>(keyfields))
        break;  // Seen all PK fields
    }
  }

  return &op->m_interface;
}


const NdbQueryLookupOperationDef*
NdbQueryBuilder::readTuple(const NdbDictionary::Index* index,    // Unique key lookup w/ index
                           const NdbDictionary::Table* table,    // Primary key lookup
                           const NdbQueryOperand* const keys[],  // Terminated by NULL element
                           const NdbQueryOptions* options,
                           const char* ident)
{
  int i;

  if (m_impl.hasError())
    return NULL;

  returnErrIf(table==0 || index==0 || keys==0, QRY_REQ_ARG_IS_NULL);
  // All operations but the first one must depend on some other operation.
  returnErrIf(m_impl.m_operations.size() > 0 && !hasLinkedOperand(keys),
              QRY_UNKNOWN_PARENT);

  const NdbIndexImpl& indexImpl = NdbIndexImpl::getImpl(*index);
  const NdbTableImpl& tableImpl = NdbTableImpl::getImpl(*table);

  // TODO: Restrict to only table_version_major() mismatch?
  returnErrIf(indexImpl.m_table_id
              != static_cast<Uint32>(table->getObjectId()) ||
              indexImpl.m_table_version
              != static_cast<Uint32>(table->getObjectVersion()),
              QRY_UNRELATED_INDEX);

  // Only 'UNIQUE' indexes may be used for lookup operations:
  returnErrIf(index->getType()!=NdbDictionary::Index::UniqueHashIndex,
              QRY_WRONG_INDEX_TYPE);

  // Check: keys[] are specified for all fields in 'index'
  int inxfields = index->getNoOfColumns();
  for (i=0; i<inxfields; ++i)
  {
    // A 'Key' value is undefined
    returnErrIf(keys[i]==NULL, QRY_TOO_FEW_KEY_VALUES);
  }
  // Check for propper NULL termination of keys[] spec
  returnErrIf(keys[inxfields]!=NULL, QRY_TOO_MANY_KEY_VALUES);

  int error = 0;
  NdbQueryIndexOperationDefImpl* op =
    new NdbQueryIndexOperationDefImpl(indexImpl, tableImpl,
                                       keys,
                                       options ? options->getImpl() : defaultOptions,
                                       ident,
                                       m_impl.m_operations.size(),
                                       m_impl.getNextInternalOpNo(),
                                       error);

  returnErrIf(m_impl.takeOwnership(op)!=0, Err_MemoryAlloc);
  returnErrIf(error!=0, error); // C'tor returned error, bailout

  // Bind to Column and check type compatibility
  for (i=0; i<inxfields; ++i)
  {
    const NdbColumnImpl& col = NdbColumnImpl::getImpl(*indexImpl.getColumn(i));
    assert (col.getColumnNo() == i);

    error = keys[i]->getImpl().bindOperand(col,*op);
    returnErrIf(error!=0, error);
  }

  return &op->m_interface;
}


const NdbQueryTableScanOperationDef*
NdbQueryBuilder::scanTable(const NdbDictionary::Table* table,
                           const NdbQueryOptions* options,
                           const char* ident)
{
  if (m_impl.hasError())
    return NULL;
  returnErrIf(table==0, QRY_REQ_ARG_IS_NULL);  // Required non-NULL arguments
  /**
   * A table scan does not depend on other operations, since there cannot be
   * linked operands in a scan filter. Therefore, it must be the first
   * operation.
   */
  returnErrIf(m_impl.m_operations.size() > 0, QRY_UNKNOWN_PARENT);

  int error = 0;
  NdbQueryTableScanOperationDefImpl* op =
    new NdbQueryTableScanOperationDefImpl(NdbTableImpl::getImpl(*table),
                                          options ? options->getImpl() : defaultOptions,
                                          ident,
                                          m_impl.m_operations.size(),
                                          m_impl.getNextInternalOpNo(),
                                          error);

  returnErrIf(m_impl.takeOwnership(op)!=0, Err_MemoryAlloc);
  returnErrIf(error!=0, error); // C'tor returned error, bailout

  return &op->m_interface;
}


const NdbQueryIndexScanOperationDef*
NdbQueryBuilder::scanIndex(const NdbDictionary::Index* index,
	                   const NdbDictionary::Table* table,
                           const NdbQueryIndexBound* bound,
                           const NdbQueryOptions* options,
                           const char* ident)
{
  if (m_impl.hasError())
    return NULL;
  // Required non-NULL arguments
  returnErrIf(table==0 || index==0, QRY_REQ_ARG_IS_NULL);

  if (m_impl.m_operations.size() > 0)
  {
    // All operations but the first one must depend on some other operation.
    returnErrIf(bound == NULL ||
                (!hasLinkedOperand(bound->m_low) &&
                 !hasLinkedOperand(bound->m_high)),
                QRY_UNKNOWN_PARENT);

    // Scan with root lookup operation has not been implemented.
    returnErrIf(!m_impl.m_operations[0]->isScanOperation(),
                QRY_WRONG_OPERATION_TYPE);

    if (options != NULL)
    {
      // A child scan should not be sorted.
      const NdbQueryOptions::ScanOrdering order =
        options->getImpl().getOrdering();
      returnErrIf(order == NdbQueryOptions::ScanOrdering_ascending ||
                  order == NdbQueryOptions::ScanOrdering_descending,
                  QRY_MULTIPLE_SCAN_SORTED);
    }
  }

  const NdbIndexImpl& indexImpl = NdbIndexImpl::getImpl(*index);
  const NdbTableImpl& tableImpl = NdbTableImpl::getImpl(*table);

  // TODO: Restrict to only table_version_major() mismatch?
  returnErrIf(indexImpl.m_table_id
              != static_cast<Uint32>(table->getObjectId()) ||
              indexImpl.m_table_version
              != static_cast<Uint32>(table->getObjectVersion()),
              QRY_UNRELATED_INDEX);

  // Only ordered indexes may be used in scan operations:
  returnErrIf(index->getType()!=NdbDictionary::Index::OrderedIndex,
              QRY_WRONG_INDEX_TYPE);

  int error = 0;
  NdbQueryIndexScanOperationDefImpl* op =
    new NdbQueryIndexScanOperationDefImpl(indexImpl, tableImpl,
                                          bound,
                                          options ? options->getImpl() : defaultOptions,
                                          ident,
                                          m_impl.m_operations.size(),
                                          m_impl.getNextInternalOpNo(),
                                          error);

  returnErrIf(m_impl.takeOwnership(op)!=0, Err_MemoryAlloc);
  returnErrIf(error!=0, error); // C'tor returned error, bailout

  returnErrIf(op->m_bound.lowKeys  > indexImpl.getNoOfColumns() ||
              op->m_bound.highKeys > indexImpl.getNoOfColumns(),
              QRY_TOO_MANY_KEY_VALUES);

  // Bind lowKeys, and if applicable, highKeys to the column being refered
  Uint32 i;
  for (i=0; i<op->m_bound.lowKeys; ++i)
  {
    const NdbColumnImpl& col = NdbColumnImpl::getImpl(*indexImpl.getColumn(i));

    const int error = (i<op->m_bound.highKeys && op->m_bound.high[i]!=op->m_bound.low[i])
       ? op->m_bound.low[i]->bindOperand(col,*op) || op->m_bound.high[i]->bindOperand(col,*op)
       : op->m_bound.low[i]->bindOperand(col,*op);

    returnErrIf(error!=0, error);
  }

  // Bind any remaining highKeys past '#lowKeys'
  for (; i<op->m_bound.highKeys; ++i)
  {
    const NdbColumnImpl& col = NdbColumnImpl::getImpl(*indexImpl.getColumn(i));
    error = op->m_bound.high[i]->bindOperand(col,*op);
    returnErrIf(error!=0, error);
  }

  return &op->m_interface;
}

const NdbQueryDef*
NdbQueryBuilder::prepare()
{
  const NdbQueryDefImpl* def = m_impl.prepare();
  return (def) ? &def->getInterface() : NULL;
}

////////////////////////////////////////
// The (hidden) Impl of NdbQueryBuilder
////////////////////////////////////////

NdbQueryBuilderImpl::NdbQueryBuilderImpl()
: m_interface(*this),
  m_error(),
  m_operations(0),
  m_operands(0),
  m_paramCnt(0),
  m_hasError(false)
{}

NdbQueryBuilderImpl::~NdbQueryBuilderImpl()
{
  // Delete all operand and operator in Vector's
  for (Uint32 i=0; i<m_operations.size(); ++i)
  {
    delete m_operations[i];
  }
  for (Uint32 i=0; i<m_operands.size(); ++i)
  {
    delete m_operands[i];
  }
}

void NdbQueryBuilderImpl::setErrorCode(int aErrorCode)
{
  assert(aErrorCode != 0);
  m_error.code = aErrorCode;
  m_hasError = true;
}

bool
NdbQueryBuilderImpl::contains(const NdbQueryOperationDefImpl* opDef)
{
  for (Uint32 i=0; i<m_operations.size(); ++i)
  { if (m_operations[i] == opDef)
      return true;
  }
  return false;
}


const NdbQueryDefImpl*
NdbQueryBuilderImpl::prepare()
{
  if (hasError())
  {
    return NULL;
  }
  if (m_operations.size() == 0)
  {
    setErrorCode(QRY_HAS_ZERO_OPERATIONS);
    return NULL;
  }

  int error;
  NdbQueryDefImpl* def = new NdbQueryDefImpl(m_operations, m_operands, error);
  m_operations.clear();
  m_operands.clear();
  m_paramCnt = 0;

  returnErrIf(def==0, Err_MemoryAlloc);
  if(unlikely(error!=0)){
    delete def;
    setErrorCode(error);
    return NULL;
  }

  if (doPrintQueryTree)
  {
    ndbout << "Query tree:" << endl;
    def->getQueryOperation(0U)
      .printTree(0, NdbQueryOperationDefImpl::SiblingMask());
  }

  return def;
}

inline int
NdbQueryBuilderImpl::takeOwnership(NdbQueryOperandImpl* operand)
{
  if (unlikely(operand == NULL))
  {
    return Err_MemoryAlloc;
  }
  else if (unlikely(m_operands.push_back(operand) != 0))
  {
    assert(errno == ENOMEM);
    delete operand;
    return Err_MemoryAlloc;
  }
  return 0;
}

inline int
NdbQueryBuilderImpl::takeOwnership(NdbQueryOperationDefImpl* operation)
{
  if (unlikely(operation == NULL))
  {
    return Err_MemoryAlloc;
  }
  else if (unlikely(m_operations.push_back(operation) != 0))
  {
    assert(errno == ENOMEM);
    delete operation;
    return Err_MemoryAlloc;
  }
  return 0;
}

NdbQueryOperand*
NdbQueryBuilderImpl::addOperand(NdbQueryOperandImpl* operand)
{
  returnErrIf(takeOwnership(operand)!=0, Err_MemoryAlloc);
  return &operand->getInterface();
}

///////////////////////////////////
// The (hidden) Impl of NdbQueryDef
///////////////////////////////////
NdbQueryDefImpl::
NdbQueryDefImpl(const Vector<NdbQueryOperationDefImpl*>& operations,
                const Vector<NdbQueryOperandImpl*>& operands,
                int& error)
 : m_interface(*this),
   m_operations(0),
   m_operands(0)
{
  if (m_operations.assign(operations) || m_operands.assign(operands))
  {
    // Failed to allocate memory in Vector::assign().
    error = Err_MemoryAlloc;
    return;
  }

  /* Grab first word, such that serialization of operation 0 will start from
   * offset 1, leaving space for the length field to be updated later
   */
  m_serializedDef.append(0);
  for(Uint32 i = 0; i<m_operations.size(); i++){
    NdbQueryOperationDefImpl* op =  m_operations[i];
    error = op->serializeOperation(m_serializedDef);
    if(unlikely(error != 0)){
      return;
    }
  }

  // Set length and number of nodes in tree.
  Uint32 cntLen;
  QueryTree::setCntLen(cntLen,
		       m_operations[m_operations.size()-1]->getInternalOpNo()+1,
		       m_serializedDef.getSize());
  m_serializedDef.put(0,cntLen);

#ifdef __TRACE_SERIALIZATION
  ndbout << "Serialized tree : ";
  for(Uint32 i = 0; i < m_serializedDef.getSize(); i++){
    char buf[12];
    sprintf(buf, "%.8x", m_serializedDef.get(i));
    ndbout << buf << " ";
  }
  ndbout << endl;
#endif
}

NdbQueryDefImpl::~NdbQueryDefImpl()
{
  // Release all NdbQueryOperations
  for (Uint32 i=0; i<m_operations.size(); ++i)
  {
    delete m_operations[i];
  }
  for (Uint32 i=0; i<m_operands.size(); ++i)
  {
    delete m_operands[i];
  }
}

const NdbQueryOperationDefImpl*
NdbQueryDefImpl::getQueryOperation(const char* ident) const
{
  if (ident==NULL)
    return NULL;

  Uint32 sz = m_operations.size();
  const NdbQueryOperationDefImpl* const* opDefs = m_operations.getBase();
  for(Uint32 i = 0; i<sz; i++, opDefs++){
    const char* opName = (*opDefs)->getName();
    if(opName!=NULL && strcmp(opName, ident) == 0)
      return *opDefs;
  }
  return NULL;
}

NdbQueryDef::QueryType
NdbQueryDefImpl::getQueryType() const
{
  if (!m_operations[0]->isScanOperation())
    return NdbQueryDef::LookupQuery;

  for (Uint32 i=1; i<m_operations.size(); ++i)
  {
    if (m_operations[i]->isScanOperation())
      return NdbQueryDef::MultiScanQuery;
  }
  return NdbQueryDef::SingleScanQuery;
}

////////////////////////////////////////////////////////////////
// The (hidden) Impl of NdbQueryOperand (w/ various subclasses)
////////////////////////////////////////////////////////////////

/* Implicit typeconversion between related datatypes: */
int NdbInt64ConstOperandImpl::convertUint8()
{
  if (unlikely(m_value < 0 || m_value > 0xFF))
    return QRY_NUM_OPERAND_RANGE;
  m_converted.val.uint8 = (Uint8)m_value;
  m_converted.len = static_cast<Uint32>(sizeof(m_converted.val.uint8));
  return 0;
}
int NdbInt64ConstOperandImpl::convertInt8()
{
  if (unlikely(m_value < -0x80L || m_value > 0x7F))
    return QRY_NUM_OPERAND_RANGE;
  m_converted.val.int8 = (Int8)m_value;
  m_converted.len = static_cast<Uint32>(sizeof(m_converted.val.int8));
  return 0;
}
int NdbInt64ConstOperandImpl::convertUint16()
{
  if (unlikely(m_value < 0 || m_value > 0xFFFF))
    return QRY_NUM_OPERAND_RANGE;
  m_converted.val.uint16 = (Uint16)m_value;
  m_converted.len = static_cast<Uint32>(sizeof(m_converted.val.uint16));
  return 0;
}
int NdbInt64ConstOperandImpl::convertInt16()
{
  if (unlikely(m_value < -0x8000L || m_value > 0x7FFF))
    return QRY_NUM_OPERAND_RANGE;
  m_converted.val.int16 = (Int16)m_value;
  m_converted.len = static_cast<Uint32>(sizeof(m_converted.val.int16));
  return 0;
}
int NdbInt64ConstOperandImpl::convertUint24()
{
  if (unlikely(m_value < 0 || m_value > 0xFFFFFF))
    return QRY_NUM_OPERAND_RANGE;
  m_converted.val.uint32 = (Uint32)m_value;
  m_converted.len = static_cast<Uint32>(sizeof(m_converted.val.uint32));
  return 0;
}
int NdbInt64ConstOperandImpl::convertInt24()
{
  if (unlikely(m_value < -0x800000L || m_value > 0x7FFFFF))
    return QRY_NUM_OPERAND_RANGE;
  m_converted.val.int32 = (Int32)m_value;
  m_converted.len = static_cast<Uint32>(sizeof(m_converted.val.int32));
  return 0;
}
int NdbInt64ConstOperandImpl::convertUint32()
{
  if (unlikely(m_value < 0 || m_value > 0xFFFFFFFF))
    return QRY_NUM_OPERAND_RANGE;
  m_converted.val.uint32 = (Uint32)m_value;
  m_converted.len = static_cast<Uint32>(sizeof(m_converted.val.uint32));
  return 0;
}
int NdbInt64ConstOperandImpl::convertInt32()
{
  if (unlikely(m_value < -((Int64)0x80000000L) || m_value > 0x7FFFFFFF))
    return QRY_NUM_OPERAND_RANGE;
  m_converted.val.int32 = (Int32)m_value;
  m_converted.len = static_cast<Uint32>(sizeof(m_converted.val.int32));
  return 0;
}
int NdbInt64ConstOperandImpl::convertInt64()
{
  m_converted.val.int64 = m_value;
  m_converted.len = static_cast<Uint32>(sizeof(m_converted.val.int64));
  return 0;
}
int NdbInt64ConstOperandImpl::convertUint64()
{
  m_converted.val.uint64 = (Uint64)m_value;
  m_converted.len = static_cast<Uint32>(sizeof(m_converted.val.uint64));
  return 0;
}

int NdbDoubleConstOperandImpl::convertFloat()
{
  m_converted.val.flt = (float)m_value;
  m_converted.len = static_cast<Uint32>(sizeof(m_converted.val.flt));
  return 0;
}
int NdbDoubleConstOperandImpl::convertDouble()
{
  m_converted.val.dbl = m_value;
  m_converted.len = static_cast<Uint32>(sizeof(m_converted.val.dbl));
  return 0;
}

int NdbCharConstOperandImpl::convertChar()
{
  Uint32 len = m_column->getLength();
  Uint32 srclen = (m_value) ? static_cast<Uint32>(strlen(m_value)) : 0;
  if (unlikely(srclen > len)) {
    // TODO: Truncates: May silently remove trailing spaces:
    return QRY_CHAR_OPERAND_TRUNCATED;
    srclen = len;
  }

  char* dst = m_converted.getCharBuffer(len);
  if (unlikely(dst==NULL))
    return Err_MemoryAlloc;

  memcpy (dst, m_value, srclen);
  if (unlikely(srclen < len)) {
    memset (dst+srclen, ' ', len-srclen);
  }
  return 0;
} //NdbCharConstOperandImpl::convertChar


int NdbCharConstOperandImpl::convertVChar()
{
  Uint32 maxlen = m_column->getLength();
  Uint32 len = (m_value) ? static_cast<Uint32>(strlen(m_value)) : 0;
  if (unlikely(len > maxlen)) {
    // TODO: Truncates: May silently remove trailing spaces:
    return QRY_CHAR_OPERAND_TRUNCATED;
    len = maxlen;
  }

  char* dst = m_converted.getCharBuffer(len);
  if (unlikely(dst==NULL))
    return Err_MemoryAlloc;

  memcpy (dst, m_value, len);
  return 0;
} //NdbCharConstOperandImpl::convertVChar


/**
 * GenericConst is 'raw data' with minimal type checking and conversion capability.
 */
int
NdbGenericConstOperandImpl::convert2ColumnType()
{
  Uint32 len = m_len;
  Uint32 maxSize = m_column->getSizeInBytes();

  char* dst = NULL;

  if (likely(m_column->m_arrayType == NDB_ARRAYTYPE_FIXED))
  {
    if (unlikely(len != maxSize))
      return QRY_OPERAND_HAS_WRONG_TYPE;

    dst = m_converted.getCharBuffer(len);
    if (unlikely(dst==NULL))
      return Err_MemoryAlloc;
  }
  else if (m_column->m_arrayType == NDB_ARRAYTYPE_SHORT_VAR)
  {
    if (unlikely(len+1 > maxSize))
      return QRY_CHAR_OPERAND_TRUNCATED;

    dst = m_converted.getCharBuffer(len+1);
    if (unlikely(dst==NULL))
      return Err_MemoryAlloc;

    *(Uint8*)dst++ = (Uint8)len;
  }
  else if (m_column->m_arrayType == NDB_ARRAYTYPE_MEDIUM_VAR)
  {
    if (unlikely(len+2 > maxSize))
      return QRY_CHAR_OPERAND_TRUNCATED;

    dst = m_converted.getCharBuffer(len+2);
    if (unlikely(dst==NULL))
      return Err_MemoryAlloc;

    *(Uint8*)dst++ = (Uint8)(len & 0xFF);
    *(Uint8*)dst++ = (Uint8)(len >> 8);
  }
  else
  {
    assert(0);
  }

  memcpy (dst, m_value, len);
  return 0;
}  //NdbGenericConstOperandImpl::convert2ColumnType


int
NdbConstOperandImpl::convert2ColumnType()
{
  switch(m_column->getType()) {
    case NdbDictionary::Column::Tinyint:         return convertInt8();
    case NdbDictionary::Column::Tinyunsigned:    return convertUint8();
    case NdbDictionary::Column::Smallint:        return convertInt16();
    case NdbDictionary::Column::Smallunsigned:   return convertUint16();
    case NdbDictionary::Column::Mediumint:       return convertInt24();
    case NdbDictionary::Column::Mediumunsigned:  return convertUint24();
    case NdbDictionary::Column::Int:             return convertInt32();
    case NdbDictionary::Column::Unsigned:        return convertUint32();
    case NdbDictionary::Column::Bigint:          return convertInt64();
    case NdbDictionary::Column::Bigunsigned:     return convertUint64();
    case NdbDictionary::Column::Float:           return convertFloat();
    case NdbDictionary::Column::Double:          return convertDouble();

    case NdbDictionary::Column::Decimal:         return convertDec();
    case NdbDictionary::Column::Decimalunsigned: return convertUDec();

    case NdbDictionary::Column::Char:            return convertChar();
    case NdbDictionary::Column::Varchar:         return convertVChar();
    case NdbDictionary::Column::Longvarchar:     return convertLVChar();
    case NdbDictionary::Column::Binary:          return convertBin();
    case NdbDictionary::Column::Varbinary:       return convertVBin();
    case NdbDictionary::Column::Longvarbinary:   return convertLVBin();
    case NdbDictionary::Column::Bit:             return convertBit();

    case NdbDictionary::Column::Date:            return convertDate();
    case NdbDictionary::Column::Time:            return convertTime();
    case NdbDictionary::Column::Datetime:        return convertDatetime();
    case NdbDictionary::Column::Timestamp:       return convertTimestamp();
    case NdbDictionary::Column::Year:            return convertYear();

    // Type conversion intentionally not supported (yet)
    case NdbDictionary::Column::Olddecimal:
    case NdbDictionary::Column::Olddecimalunsigned:
    case NdbDictionary::Column::Blob:
    case NdbDictionary::Column::Text:
      // Fall through:

    default:
    case NdbDictionary::Column::Undefined:    return QRY_OPERAND_HAS_WRONG_TYPE;
  }

  return 0;
} //NdbConstOperandImpl::convert2ColumnType


int
NdbConstOperandImpl::bindOperand(
                           const NdbColumnImpl& column,
                           NdbQueryOperationDefImpl& operation)
{
  const int error = NdbQueryOperandImpl::bindOperand(column,operation);
  if (unlikely(error))
    return error;

  return convert2ColumnType();
}


int
NdbLinkedOperandImpl::bindOperand(
                           const NdbColumnImpl& column,
                           NdbQueryOperationDefImpl& operation)
{
  const NdbColumnImpl& parentColumn = getParentColumn();

  if (unlikely(column.m_type      != parentColumn.m_type ||
               column.m_precision != parentColumn.m_precision ||
               column.m_scale     != parentColumn.m_scale ||
               column.m_length    != parentColumn.m_length ||
               column.m_cs        != parentColumn.m_cs))
    return QRY_OPERAND_HAS_WRONG_TYPE;  // Incompatible datatypes

  if (unlikely(column.m_type == NdbDictionary::Column::Blob ||
               column.m_type == NdbDictionary::Column::Text))
    return QRY_OPERAND_HAS_WRONG_TYPE;  // BLOB/CLOB datatypes intentionally not supported

  // TODO: Allow and autoconvert compatible datatypes

  // Register parent/child operation relations
  const int error = operation.linkWithParent(&this->m_parentOperation);
  if (unlikely(error))
    return error;

  return NdbQueryOperandImpl::bindOperand(column,operation);
}


int
NdbParamOperandImpl::bindOperand(
                           const NdbColumnImpl& column,
                           NdbQueryOperationDefImpl& operation)
{
  if (unlikely(column.m_type == NdbDictionary::Column::Blob ||
               column.m_type == NdbDictionary::Column::Text))
    return QRY_OPERAND_HAS_WRONG_TYPE;  // BLOB/CLOB datatypes intentionally not supported

  const int res = operation.addParamRef(this);
  if (unlikely(res != 0))
  {
    return res;
  }
  return NdbQueryOperandImpl::bindOperand(column,operation);
}


/////////////////////////////////////////////////////////////////
// The (hidden) Impl of NdbQueryOperation (w/ various subclasses)
///////////////////////>/////////////////////////////////////////

NdbQueryLookupOperationDefImpl::NdbQueryLookupOperationDefImpl (
                           const NdbTableImpl& table,
                           const NdbQueryOperand* const keys[],
                           const NdbQueryOptionsImpl& options,
                           const char* ident,
                           Uint32      opNo,
                           Uint32      internalOpNo,
                           int& error)
  : NdbQueryOperationDefImpl(table, options, ident, opNo,
                             internalOpNo, error),
   m_interface(*this)
{
  int i;
  for (i=0; i<MAX_ATTRIBUTES_IN_INDEX; ++i)
  { if (keys[i] == NULL)
      break;
    m_keys[i] = &keys[i]->getImpl();
  }
  assert (i > 0);
  assert (keys[i] == NULL);
  m_keys[i] = NULL;
}

NdbQueryIndexScanOperationDefImpl::NdbQueryIndexScanOperationDefImpl (
                           const NdbIndexImpl& index,
                           const NdbTableImpl& table,
                           const NdbQueryIndexBound* bound,
                           const NdbQueryOptionsImpl& options,
                           const char* ident,
                           Uint32      opNo,
                           Uint32      internalOpNo,
                           int& error)
  : NdbQueryScanOperationDefImpl(table, options, ident, opNo, internalOpNo,
                                 error),
  m_interface(*this),
  m_index(index),
  m_paramInPruneKey(false)
{
  memset(&m_bound, 0, sizeof m_bound);
  if (bound!=NULL) {

    if (bound->m_low!=NULL) {
      int i;
      for (i=0; bound->m_low[i] != NULL; ++i)
      { assert (i<MAX_ATTRIBUTES_IN_INDEX);
        m_bound.low[i] = &bound->m_low[i]->getImpl();
      }
      m_bound.lowKeys = i;
    } else {
      m_bound.lowKeys = 0;
    }

    if (bound->m_high!=NULL) {
      int i;
      for (i=0; bound->m_high[i] != NULL; ++i)
      { assert (i<MAX_ATTRIBUTES_IN_INDEX);
        m_bound.high[i] = &bound->m_high[i]->getImpl();
      }
      m_bound.highKeys = i;
    } else {
      m_bound.highKeys = 0;
    }

    m_bound.lowIncl = bound->m_lowInclusive;
    m_bound.highIncl = bound->m_highInclusive;
  }
  else {
    m_bound.lowKeys = m_bound.highKeys = 0;
    m_bound.lowIncl = m_bound.highIncl = true;
  }
}

int
NdbQueryIndexScanOperationDefImpl::checkPrunable(
                              const Uint32Buffer& keyInfo,
			      Uint32  shortestBound,
                              bool&   isPruned,
                              Uint32& hashValue) const  // 'hashValue' only defined if 'isPruned'
{
  /**
   * Determine if scan may be pruned to a single partition:
   */
  isPruned = false;
  const NdbRecord* const tableRecord = getTable().getDefaultRecord();
  const NdbRecord* const indexRecord = m_index.getDefaultRecord();
  /**
   * This is the prefix (in number of fields) of the index key that will contain
   * all the distribution key fields.
   */
  const Uint32 prefixLength = indexRecord->m_min_distkey_prefix_length;

  if (indexRecord->m_no_of_distribution_keys != tableRecord->m_no_of_distribution_keys)
  {
    return 0; // Index does not contain all fields in the distribution key.
  }
  else if (shortestBound < prefixLength)
  {
    // Bounds set on query instance are to short to contain full dist key.
    return 0;
  }
  // Bounds being part of query definitions should have been covered by 'shortestBound' above
  assert( (m_bound.lowKeys+m_bound.highKeys==0) ||
          (m_bound.lowKeys >= prefixLength && m_bound.highKeys >= prefixLength));

  /**
   * The scan will be prunable if all upper and lower bound pairs are equal
   * for the prefix containing the distribution key, and if all bounds
   * give the same hash value for the distribution key.
   */
  Uint32 keyPos = 0;

  // Loop over all bounds.
  Uint32 boundNo = 0;
  while (keyPos < keyInfo.getSize())
  {
    const Uint32 keyEnd = keyPos + (keyInfo.get(keyPos) >> 16);
    Ndb::Key_part_ptr distKey[NDB_MAX_NO_OF_ATTRIBUTES_IN_KEY+1]
      = {{NULL, 0}};

    // Loop over the fields in each bound.
    Uint32 keyPartNo = 0;
    Uint32 distKeyPartNo = 0;
    while (keyPos < keyEnd)
    {
      const NdbIndexScanOperation::BoundType type =
        static_cast<NdbIndexScanOperation::BoundType>
        (keyInfo.get(keyPos) & 0xF);
      const AttributeHeader attHead1(keyInfo.get(keyPos+1));
      const Ndb::Key_part_ptr keyPart1 = { keyInfo.addr(keyPos+2),
                                           attHead1.getByteSize() };

      keyPos += 1+1+attHead1.getDataSize();  // Skip data read above.

      const NdbColumnImpl& column
        = NdbColumnImpl::getImpl(*m_index.getColumn(keyPartNo));

      switch (type)
      {
      case NdbIndexScanOperation::BoundEQ:
        break;
      case NdbIndexScanOperation::BoundGE:
      case NdbIndexScanOperation::BoundGT:
        /**
         * We have a one-sided limit for this field, which is part of
         * the prefix containing the distribution key. We thus cannot prune.
         */
        return 0;
      case NdbIndexScanOperation::BoundLE:
      case NdbIndexScanOperation::BoundLT:
        /**
         * If keyPart1 is a lower limit for this column, there may be an upper
         * limit also.
         */
        if (keyPos == keyEnd ||
            ((keyInfo.get(keyPos) & 0xF) != NdbIndexScanOperation::BoundGE &&
             (keyInfo.get(keyPos) & 0xF) != NdbIndexScanOperation::BoundGT))
        {
          /**
           * We have a one-sided limit for this field, which is part of
           * the prefix containing the distribution key. We thus cannot prune.
           */
          return 0;
        }
        else // There is an upper limit.
        {
          const AttributeHeader attHeadHigh(keyInfo.get(keyPos+1));
          const Ndb::Key_part_ptr highKeyPart = { keyInfo.addr(keyPos+2),
                                                  attHeadHigh.getByteSize() };

          keyPos += 1+1+attHeadHigh.getDataSize();  // Skip data read above.

          /**
           * We must compare key parts in the prefix that contains the
           * distribution key. Even if subseqent parts should be different,
           * all matching tuples must have the same (distribution) hash.
           *
           * For example, assume there is a ordered index on {a, dist_key, b}.
           * Then any tuple in the range {a=c1, <dist key=c2>, b=c3} to
           * {a=c1, dist_key=c2, b=c4} will have dist_key=c2.
           * Then consider a range where fields before the distribution key are
           * different, e.g. {a=c6, <dist key=c7>, b=c8} to
           * {a=c9, <dist key=c7>, b=c8} then matching tuples can have any value
           * for the distribution key as long as c6 <= a <= c9, so there can be
           * no pruning.
           */
          assert(column.m_keyInfoPos < tableRecord->noOfColumns);
          const NdbRecord::Attr& recAttr = tableRecord->columns[column.m_keyInfoPos];
          /**
           * Shinked varchars should already have been converted in
           * NdbQueryImpl::setBound(), so no need to deal with them here.
           * (See also bug#56853 and http://lists.mysql.com/commits/121387 .)
           */
          assert((recAttr.flags & NdbRecord::IsMysqldShrinkVarchar) == 0);
          const int res=
            (*recAttr.compare_function)(recAttr.charset_info,
                                        keyPart1.ptr, keyPart1.len,
                                        highKeyPart.ptr, highKeyPart.len);
          if (res!=0)
          {  // Not equal
            return 0;
          }
        } // if (keyPos == keyEnd ||
        break;
      default:
        assert(false);
      } // switch (type)

      // If this field is part of the distribution key:
      // Keep the key value for later use by Ndb::computeHash.
      if (getTable().m_columns[column.m_keyInfoPos]->m_distributionKey)
      {
        /* Find the proper place for this field in the distribution key.*/
        Ndb::Key_part_ptr* distKeyPtr = distKey;
        for (Uint32 i = 0; i < column.m_keyInfoPos; i++)
        {
          if (getTable().m_columns[i]->m_distributionKey)
          {
            distKeyPtr++;
          }
        }

        assert(distKeyPtr->len == 0 && distKeyPtr->ptr == NULL);
        *distKeyPtr = keyPart1;
        distKeyPartNo++;
      }

      keyPartNo++;
      if (keyPartNo == prefixLength)
      {
        /**
         * Skip key parts after the prefix containing the distribution key,
         * as these do not affect prunability.
         */
        keyPos = keyEnd;
      }
    } // while (keyPos < keyEnd)

    assert(distKeyPartNo == tableRecord->m_no_of_distribution_keys);

    // hi/low are equal and prunable bounds.
    Uint32 newHashValue = 0;
    const int error = Ndb::computeHash(&newHashValue, &getTable(), distKey,
                                       NULL, 0);
    if (unlikely(error))
      return error;

    if (boundNo == 0)
    {
      hashValue = newHashValue;
    }
    else if (hashValue != newHashValue)
    {
      /* This bound does not have the same hash value as the previous one.
       * So we make the pessimistic assumtion that it will not hash to the
       * same node. (See also comments in
       * NdbScanOperation::getPartValueFromInfo()).
       */
      return 0;
    }

    boundNo++;
  } // while (keyPos < keyInfo.getSize())

  isPruned = true;
  return 0;
} // NdbQueryIndexScanOperationDefImpl::checkPrunable


NdbQueryOperationDefImpl::NdbQueryOperationDefImpl (
                                     const NdbTableImpl& table,
                                     const NdbQueryOptionsImpl& options,
                                     const char* ident,
                                     Uint32      opNo,
                                     Uint32      internalOpNo,
                                     int& error)
  :m_isPrepared(false),
   m_diskInChildProjection(false),
   m_table(table),
   m_ident(ident),
   m_opNo(opNo), m_internalOpNo(internalOpNo),
   m_options(options),
   m_parent(NULL),
   m_children(0),
   m_params(0),
   m_spjProjection(0)
{
  if (unlikely(m_internalOpNo >= NDB_SPJ_MAX_TREE_NODES))
  {
    error = QRY_DEFINITION_TOO_LARGE;
    return;
  }
  if (m_options.m_parent != NULL)
  {
    m_parent = m_options.m_parent;
    const int res = m_parent->addChild(this);
    if (unlikely(res != 0))
    {
      error = res;
      return;
    }
  }  // else, ::linkWithParent() will assign 'm_parent'
}


int
NdbQueryOperationDefImpl::addChild(NdbQueryOperationDefImpl* childOp)
{
  for (Uint32 i=0; i<m_children.size(); ++i)
  { if (m_children[i] == childOp)
      return 0;
  }
  if (likely(m_children.push_back(childOp) == 0))
  {
    return 0;
  }
  else
  {
    assert(errno == ENOMEM);
    return Err_MemoryAlloc;
  }
}

void
NdbQueryOperationDefImpl::removeChild(const NdbQueryOperationDefImpl* childOp)
{
  for (unsigned i=0; i<m_children.size(); ++i)
  {
    if (m_children[i] == childOp)
    {
      m_children.erase(i);
      return;
    }
  }
}

bool
NdbQueryOperationDefImpl::isChildOf(const NdbQueryOperationDefImpl* parentOp) const
{
  if (m_parent != NULL)
  { if (this->m_parent == parentOp)
    {
#ifndef NDEBUG
      // Assert that parentOp also refer 'this' as a child.
      for (Uint32 j=0; j<parentOp->getNoOfChildOperations(); j++)
      { if (&parentOp->getChildOperation(j) == this)
          return true;
      }
      assert(false);
#endif
      return true;
    }
    else if (m_parent->isChildOf(parentOp))
    {
      return true;
    }
  }
  return false;
}

int
NdbQueryOperationDefImpl::linkWithParent(NdbQueryOperationDefImpl* parentOp)
{
  if (this->isChildOf(parentOp))
  {
    // There should only be a single parent/child relationship registered.
    return 0;
  }

  if (m_parent != NULL)
  {
    /**
     * Multiple parental relationship not allowed.
     * It is likely that the conflict is due to one of the
     * parents actually being a grand parent.
     * This can be resolved if existing parent actually was a grandparent.
     * Then register new parentOp as the real parrent.
     */
    if (parentOp->isChildOf(m_parent))
    { // Remove existing grandparent linkage being replaced by parentOp.
      m_parent->removeChild(this);
      m_parent = NULL;
    }
    else
    { // This is a real multiparent error.
      return QRY_MULTIPLE_PARENTS;
    }
  }
  m_parent = parentOp;
  parentOp->addChild(this);
  return 0;
}


// Register a linked reference to a column available from this operation
Uint32
NdbQueryOperationDefImpl::addColumnRef(const NdbColumnImpl* column,
                                       int& error)
{
  Uint32 spjRef;
  for (spjRef=0; spjRef<m_spjProjection.size(); ++spjRef)
  { if (m_spjProjection[spjRef] == column)
      return spjRef;
  }

  // Add column if not already available
  if (unlikely(m_spjProjection.push_back(column) != 0))
  {
    assert(errno == ENOMEM);
    error = Err_MemoryAlloc;
    return ~0;
  }
  if (column->getStorageType() == NDB_STORAGETYPE_DISK)
  {
    m_diskInChildProjection = true;
  }
  return spjRef;
}

int NdbQueryOperationDefImpl::addParamRef(const NdbParamOperandImpl* param)
{
  if (unlikely(m_params.push_back(param) != 0))
  {
    assert(errno == ENOMEM);
    return Err_MemoryAlloc;
  }
  return 0;
}

/** This class is used for serializing sequences of 16 bit integers,
 * where the first 16 bit integer specifies the length of the sequence.
 */
class Uint16Sequence{
public:
  explicit Uint16Sequence(Uint32Buffer& buffer, Uint32 size):
    m_seq(NULL),
    m_size(size),
    m_pos(0),
    m_finished(false)
 {
    m_seq = buffer.alloc(1 + size/2);
    assert (size <= 0xFFFF);
    m_seq[0] = size;
  }

  ~Uint16Sequence()
  { assert(m_finished);
  }

  /** Add an item to the sequence.*/
  void append(Uint16 value) {
    assert(m_pos < m_size);
    assert(m_seq);
    m_pos++;
    if ((m_pos & 1) == 1) {
      m_seq[m_pos/2] |= (value<<16);
    } else {
      m_seq[m_pos/2] = value;
    }
  }


  /** End the sequence and pad possibly unused Int16 word at end. */
  void finish() {
    assert(m_pos == m_size);
    assert(!m_finished);
    m_finished = true;
    if (m_pos>0) {
      if ((m_pos & 1) == 0) {
	m_seq[m_pos/2] |= (0xBABE<<16);
      }
    }
  }

private:
  /** Should not be copied.*/
  Uint16Sequence(Uint16Sequence&);
  /** Should not be assigned.*/
  Uint16Sequence& operator=(Uint16Sequence&);

  Uint32*       m_seq;      // Preallocated buffer to append Uint16's into
  const Uint32  m_size;     // Uint16 words available in m_seq
  Uint32        m_pos;      // Current Uint16 word to fill in
  bool          m_finished; // Debug assert of correct call convention
};


Uint32
NdbQueryOperationDefImpl::appendParentList(Uint32Buffer& serializedDef) const
{
  if (getParentOperation() != NULL)
  {
    Uint16Sequence parentSeq(serializedDef, 1);
    assert (getParentOperation()->getInternalOpNo() < getInternalOpNo());
    parentSeq.append(getParentOperation()->getInternalOpNo());
    parentSeq.finish();
    return DABits::NI_HAS_PARENT;
  }
  return 0;
} // NdbQueryOperationDefImpl::appendParentList


/* Add the projection that should be send to the SPJ block such that
 * child operations can be instantiated.
 */
Uint32
NdbQueryOperationDefImpl::appendChildProjection(Uint32Buffer& serializedDef) const
{
  Uint32 requestInfo = 0;
  if (m_spjProjection.size() > 0 || getNoOfChildOperations() > 0)
  {
    requestInfo |= DABits::NI_LINKED_ATTR;
    Uint16Sequence spjProjSeq(serializedDef, m_spjProjection.size());
    for (Uint32 i = 0; i<m_spjProjection.size(); i++)
    {
      spjProjSeq.append(m_spjProjection[i]->getColumnNo());
    }
    spjProjSeq.finish();

    if (m_diskInChildProjection)
    {
      requestInfo |= DABits::NI_LINKED_DISK;
    }
  }
  return requestInfo;
} // NdbQueryOperationDefImpl::appendChildProjection

/** Used by NdbQueryOperationDefImpl::printTree() to print the arrows
 * that connect the tree nodes.
 */
static void printMargin(Uint32 depth,
                        NdbQueryOperationDefImpl::SiblingMask
                        hasMoreSiblingsMask,
                        bool header)
{
  if (depth > 0)
  {
    // Print vertical lines to the siblings of the ancestore nodes.
    for (Uint32 i = 0; i<depth-1; i++)
    {
      if (hasMoreSiblingsMask.get(i+1))
      {
        ndbout << "|  ";
      }
      else
      {
        ndbout << "   ";
      }
    }
    if (header)
    {
      ndbout << "+->";
    }
    else if (hasMoreSiblingsMask.get(depth))
    {
      ndbout << "|  ";
    }
    else
    {
      ndbout << "   ";
    }
  }
}

void
NdbQueryOperationDefImpl::printTree(Uint32 depth,
                                    SiblingMask hasMoreSiblingsMask) const
{
  // Print vertical line leading down to this node.
  SiblingMask firstLineMask = hasMoreSiblingsMask;
  firstLineMask.set(depth);
  printMargin(depth, firstLineMask, false);
  ndbout << endl;
  // Print +-> leading to this node.
  printMargin(depth, hasMoreSiblingsMask, true);
  ndbout << NdbQueryOperationDef::getTypeName(getType()) << endl;
  printMargin(depth, hasMoreSiblingsMask, false);
  // Print attributes.
  ndbout << " opNo: " << getOpNo()
         << " (internal: " << getInternalOpNo() << ")" << endl;
  printMargin(depth, hasMoreSiblingsMask, false);
  ndbout << " table: " << getTable().getName() << endl;
  if (getIndex() != NULL)
  {
    printMargin(depth, hasMoreSiblingsMask, false);
    ndbout << " index: " << getIndex()->getName() << endl;
  }

  for (int childNo = 0;
       childNo < static_cast<int>(getNoOfChildOperations());
       childNo++)
  {
    if (childNo == 0)
    {
      /* For each child but the last one, use a mask with an extra bit set to
       * indicate that there are more siblings.
       */
      hasMoreSiblingsMask.set(depth+1);
    }
    if (childNo == static_cast<int>(getNoOfChildOperations()) - 1)
    {
      // The last child has no more siblings.
      hasMoreSiblingsMask.clear(depth+1);
    }
    getChildOperation(childNo).printTree(depth+1, hasMoreSiblingsMask);
  }
} // NdbQueryOperationDefImpl::printTree()


Uint32
NdbQueryLookupOperationDefImpl::appendKeyPattern(Uint32Buffer& serializedDef) const
{
  Uint32 appendedPattern = 0;

  /**
   * Key value for root operation is constructed when query is instantiated with
   * NdbQueryOperationImpl::prepareIndexKeyInfo()
   */
  if (getOpNo() == 0)
    return 0;

  if (m_keys[0]!=NULL)
  {
    Uint32 startPos = serializedDef.getSize();
    serializedDef.append(0);     // Grab first word for length field, updated at end
    int paramCnt = 0;
    int keyNo = 0;
    const NdbQueryOperandImpl* key = m_keys[0];
    do
    {
      switch(key->getKind()){
      case NdbQueryOperandImpl::Linked:
      {
        appendedPattern |= DABits::NI_KEY_LINKED;
        const NdbLinkedOperandImpl& linkedOp = *static_cast<const NdbLinkedOperandImpl*>(key);
        const NdbQueryOperationDefImpl* parent = getParentOperation();
        uint32 levels = 0;
        while (parent != &linkedOp.getParentOperation())
        {
          if (parent->getType() == NdbQueryOperationDef::UniqueIndexAccess)  // Represented with two nodes in QueryTree
            levels+=2;
          else
            levels+=1;
          parent = parent->getParentOperation();
          assert(parent != NULL);
        }
        if (levels > 0)
        {
          serializedDef.append(QueryPattern::parent(levels));
        }
        serializedDef.append(QueryPattern::col(linkedOp.getLinkedColumnIx()));
        break;
      }
      case NdbQueryOperandImpl::Const:
      {
        appendedPattern |= DABits::NI_KEY_CONSTS;
        const NdbConstOperandImpl& constOp = *static_cast<const NdbConstOperandImpl*>(key);

        // No of words needed for storing the constant data.
        const Uint32 wordCount =  AttributeHeader::getDataSize(constOp.getSizeInBytes());
        // Set type and length in words of key pattern field.
        serializedDef.append(QueryPattern::data(wordCount));
        serializedDef.appendBytes(constOp.getAddr(),constOp.getSizeInBytes());
        break;
      }
      case NdbQueryOperandImpl::Param:
      {
        appendedPattern |= DABits::NI_KEY_PARAMS;
        serializedDef.append(QueryPattern::param(paramCnt++));
        break;
      }
      default:
        assert(false);
      }
      key = m_keys[++keyNo];
    } while (key!=NULL);

    // Set total length of key pattern.
    Uint32 len = serializedDef.getSize() - startPos -1;
    serializedDef.put(startPos, (paramCnt << 16) | (len));
  }

  return appendedPattern;
} // NdbQueryLookupOperationDefImpl::appendKeyPattern


Uint32
NdbQueryIndexScanOperationDefImpl::appendPrunePattern(Uint32Buffer& serializedDef)
{
  Uint32 appendedPattern = 0;

  /**
   * Bound value for root operation is constructed when query is instantiated with
   * NdbQueryOperationImpl::prepareIndexKeyInfo()
   */
  if (getOpNo() == 0)
    return 0;

  if (m_bound.lowKeys>0 || m_bound.highKeys>0)
  {
    const NdbRecord* const tableRecord = getTable().getDefaultRecord();
    const NdbRecord* const indexRecord = m_index.getDefaultRecord();

    if (indexRecord->m_no_of_distribution_keys != tableRecord->m_no_of_distribution_keys)
    {
      return 0; // Index does not contain all fields in the distribution key.
    }

    /**
     * This is the prefix (in number of fields) of the index key that will contain
     * all the distribution key fields.
     */
    Uint32 distKeys = indexRecord->m_min_distkey_prefix_length;
    if (m_bound.lowKeys < distKeys || m_bound.highKeys < distKeys)
    {
      // Bounds set on query definition are to short to contain full dist key.
      return 0;
    }

    /* All low/high bounds should be defined equal within the 'distKey' */
    for (unsigned keyNo = 0; keyNo < distKeys; keyNo++)
    {
      if (m_bound.low[keyNo] != m_bound.high[keyNo])
        return 0;
    }

    {
      int paramCnt = 0;
      Uint32 startPos = serializedDef.getSize();
      serializedDef.append(0);     // Grab first word for length field, updated at end

      for (unsigned i = 0; i < indexRecord->distkey_index_length; i++)
      {
        const unsigned keyNo = indexRecord->distkey_indexes[i];
        assert(keyNo<indexRecord->noOfColumns);
        const NdbRecord::Attr& indexAttr = indexRecord->columns[keyNo];
        assert(indexAttr.flags & NdbRecord::IsDistributionKey);
        assert(indexAttr.index_attrId<m_bound.lowKeys);
        const NdbQueryOperandImpl* key = m_bound.low[indexAttr.index_attrId];

        switch(key->getKind())
        {
          case NdbQueryOperandImpl::Linked:
          {
            appendedPattern |= QN_ScanIndexNode::SI_PRUNE_LINKED;
            const NdbLinkedOperandImpl& linkedOp = *static_cast<const NdbLinkedOperandImpl*>(key);
            const NdbQueryOperationDefImpl* parent = getParentOperation();
            uint32 levels = 0;
            while (parent != &linkedOp.getParentOperation())
            {
              if (parent->getType() == NdbQueryOperationDef::UniqueIndexAccess)  // Represented with two nodes in QueryTree
                levels+=2;
              else
                levels+=1;
              parent = parent->getParentOperation();
              assert(parent != NULL);
            }
            if (levels > 0)
            {
              serializedDef.append(QueryPattern::parent(levels));
            }
            serializedDef.append(QueryPattern::col(linkedOp.getLinkedColumnIx()));
            break;
          }
          case NdbQueryOperandImpl::Const:
          {
//          appendedPattern |= QN_ScanIndexNode::SI_PRUNE_CONST;
            const NdbConstOperandImpl& constOp = *static_cast<const NdbConstOperandImpl*>(key);

            // No of words needed for storing the constant data.
            const Uint32 wordCount =  AttributeHeader::getDataSize(constOp.getSizeInBytes());
            // Set type and length in words of key pattern field.
            serializedDef.append(QueryPattern::data(wordCount));
            serializedDef.appendBytes(constOp.getAddr(),
                                      constOp.getSizeInBytes());
            break;
          }
          case NdbQueryOperandImpl::Param:
            appendedPattern |= QN_ScanIndexNode::SI_PRUNE_PARAMS;
            m_paramInPruneKey = true;
            serializedDef.append(QueryPattern::param(paramCnt++));
            break;
          default:
            assert(false);
        }
      }

      // Set total length of bound pattern.
      Uint32 len = serializedDef.getSize() - startPos -1;
      serializedDef.put(startPos, (paramCnt << 16) | (len));
      appendedPattern |= QN_ScanIndexNode::SI_PRUNE_PATTERN;
    }
  }
  return appendedPattern;
} // NdbQueryIndexScanOperationDefImpl::appendPrunePattern


Uint32
NdbQueryIndexScanOperationDefImpl::appendBoundValue(
                                 Uint32Buffer& serializedDef,
                                 NdbIndexScanOperation::BoundType type,
                                 const NdbQueryOperandImpl* value,
                                 int& paramCnt) const
{
  Uint32 appendedPattern = 0;

  // Append BoundType as a constant value
  serializedDef.append(QueryPattern::data(1));
  serializedDef.append(type);

  switch(value->getKind())
  {
    case NdbQueryOperandImpl::Linked:
    {
      appendedPattern |= DABits::NI_KEY_LINKED;
      const NdbLinkedOperandImpl& linkedOp = *static_cast<const NdbLinkedOperandImpl*>(value);
      const NdbQueryOperationDefImpl* parent = getParentOperation();
      uint32 levels = 0;
      while (parent != &linkedOp.getParentOperation())
      {
        if (parent->getType() == NdbQueryOperationDef::UniqueIndexAccess)  // Represented with two nodes in QueryTree
          levels+=2;
        else
          levels+=1;
        parent = parent->getParentOperation();
        assert(parent != NULL);
      }
      if (levels > 0)
      {
        serializedDef.append(QueryPattern::parent(levels));
      }
//    serializedDef.append(QueryPattern::col(linkedOp.getLinkedColumnIx()));
      serializedDef.append(QueryPattern::attrInfo(linkedOp.getLinkedColumnIx())); // col w/ AttributeHeader
      break;
    }
    case NdbQueryOperandImpl::Const:
    {
      appendedPattern |= DABits::NI_KEY_CONSTS;
      const NdbConstOperandImpl& constOp = *static_cast<const NdbConstOperandImpl*>(value);

      // Build the AttributeHeader for const value
      // (AttributeId is later filled in by SPJ in Dbspj::scanIndex_fixupBound())
      AttributeHeader ah(0, constOp.getSizeInBytes());

      // Constant is then appended as AttributeHeader + const-value
      serializedDef.append(QueryPattern::data(1+ah.getDataSize()));
      serializedDef.append(ah.m_value);
      serializedDef.appendBytes(constOp.getAddr(),constOp.getSizeInBytes());
      break;
    }
    case NdbQueryOperandImpl::Param:
    {
      appendedPattern |= DABits::NI_KEY_PARAMS;
//    serializedDef.append(QueryPattern::param(paramCnt++));
      serializedDef.append(QueryPattern::paramHeader(paramCnt++));
      break;
    }
    default:
      assert(false);
  }

  return appendedPattern;
} // NdbQueryIndexScanOperationDefImpl::appendBoundValue


/**
 * Append the complete patterns for hi & low bound for an index range scan.
 * Each bound may consist of multiple values which in turn are
 * added with NdbQueryIndexScanOperationDefImpl::appendBoundPattern()
 */
Uint32
NdbQueryIndexScanOperationDefImpl::appendBoundPattern(Uint32Buffer& serializedDef) const
{
  Uint32 appendedPattern = 0;

  /**
   * Bound value for root operation is constructed when query is instantiated with
   * NdbQueryOperationImpl::prepareIndexKeyInfo()
   */
  if (getOpNo() == 0)
    return 0;

  if (m_bound.lowKeys>0 || m_bound.highKeys>0)
  {
    int paramCnt = 0;
    Uint32 startPos = serializedDef.getSize();
    serializedDef.append(0);     // Grab first word for length field, updated at end

    const uint key_count =
       (m_bound.lowKeys >= m_bound.highKeys) ? m_bound.lowKeys : m_bound.highKeys;

    for (uint keyNo=0; keyNo<key_count; ++keyNo)
    {
      NdbIndexScanOperation::BoundType bound_type;

      /* If upper and lower limits are equal, a single BoundEQ is sufficient */
      if (keyNo < m_bound.lowKeys  &&
          keyNo < m_bound.highKeys &&
          m_bound.low[keyNo] == m_bound.high[keyNo])
      {
        /* Inclusive if defined, or matching rows can include this value */
        bound_type= NdbIndexScanOperation::BoundEQ;

        appendedPattern |=
          appendBoundValue(serializedDef, bound_type, m_bound.low[keyNo], paramCnt);

      } else {

        /* If key is part of lower bound */
        if (keyNo < m_bound.lowKeys)
        {
          /* Inclusive if defined, or matching rows can include this value */
          bound_type= m_bound.lowIncl || keyNo+1 < m_bound.lowKeys ?
              NdbIndexScanOperation::BoundLE : NdbIndexScanOperation::BoundLT;

          appendedPattern |=
            appendBoundValue(serializedDef, bound_type, m_bound.low[keyNo], paramCnt);
        }

        /* If key is part of upper bound */
        if (keyNo < m_bound.highKeys)
        {
          /* Inclusive if defined, or matching rows can include this value */
          bound_type= m_bound.highIncl || keyNo+1 < m_bound.highKeys ?
              NdbIndexScanOperation::BoundGE : NdbIndexScanOperation::BoundGT;

          appendedPattern |=
            appendBoundValue(serializedDef, bound_type, m_bound.high[keyNo], paramCnt);
        }
      }
    } // for 'all bound values'

    // Set total length of bound pattern.
    Uint32 len = serializedDef.getSize() - startPos -1;
    serializedDef.put(startPos, (paramCnt << 16) | (len));
  }

  return appendedPattern;
} // NdbQueryIndexScanOperationDefImpl::appendBoundPattern


int
NdbQueryPKLookupOperationDefImpl
::serializeOperation(Uint32Buffer& serializedDef)
{
  assert (m_keys[0]!=NULL);
  // This method should only be invoked once.
  assert (!m_isPrepared);
  m_isPrepared = true;

  // Reserve memory for LookupNode, fill in contents later when
  // 'length' and 'requestInfo' has been calculated.
  Uint32 startPos = serializedDef.getSize();
  serializedDef.alloc(QN_LookupNode::NodeSize);
  Uint32 requestInfo = 0;

  /**
   * NOTE: Order of sections within the optional part is fixed as:
   *    Part1:  'NI_HAS_PARENT'
   *    Part2:  'NI_KEY_PARAMS, NI_KEY_LINKED, NI_KEY_CONST'
   *    PART3:  'NI_LINKED_ATTR ++
   */

  // Optional part1: Make list of parent nodes.
  requestInfo |= appendParentList (serializedDef);

  // Part2: Append m_keys[] values specifying lookup key.
  requestInfo |= appendKeyPattern(serializedDef);

  // Part3: Columns required by SPJ to instantiate further child operations.
  requestInfo |= appendChildProjection(serializedDef);

  // Fill in LookupNode contents (Already allocated, 'startPos' is our handle:
  QN_LookupNode* node = reinterpret_cast<QN_LookupNode*>(serializedDef.addr(startPos));
  if (unlikely(node==NULL)) {
    return Err_MemoryAlloc;
  }
  node->tableId = getTable().getObjectId();
  node->tableVersion = getTable().getObjectVersion();
  node->requestInfo = requestInfo;
  const Uint32 length = serializedDef.getSize() - startPos;
  if (unlikely(length > 0xFFFF)) {
    return QRY_DEFINITION_TOO_LARGE; //Query definition too large.
  } else {
    QueryNode::setOpLen(node->len, QueryNode::QN_LOOKUP, length);
  }

#ifdef __TRACE_SERIALIZATION
  ndbout << "Serialized node " << getInternalOpNo() << " : ";
  for (Uint32 i = startPos; i < serializedDef.getSize(); i++) {
    char buf[12];
    sprintf(buf, "%.8x", serializedDef.get(i));
    ndbout << buf << " ";
  }
  ndbout << endl;
#endif

  return 0;
} // NdbQueryPKLookupOperationDefImpl::serializeOperation


int
NdbQueryIndexOperationDefImpl
::serializeOperation(Uint32Buffer& serializedDef)
{
  assert (m_keys[0]!=NULL);
  // This method should only be invoked once.
  assert (!m_isPrepared);
  m_isPrepared = true;

  /**
   * Serialize unique index as a seperate lookupNode
   */
  {
    // Reserve memory for Index LookupNode, fill in contents later when
    // 'length' and 'requestInfo' has been calculated.
    Uint32 startPos = serializedDef.getSize();
    serializedDef.alloc(QN_LookupNode::NodeSize);
    Uint32 requestInfo = QN_LookupNode::L_UNIQUE_INDEX;

    // Optional part1: Make list of parent nodes.
    assert (getInternalOpNo() > 0);
    requestInfo |= appendParentList (serializedDef);

    // Part2: m_keys[] are the keys to be used for index
    requestInfo |= appendKeyPattern(serializedDef);

    /* Basetable is executed as child operation of index:
     * Add projection of (only) NDB$PK column which is hidden *after* last index column.
     */
    {
      requestInfo |= DABits::NI_LINKED_ATTR;
      Uint16Sequence spjProjSeq(serializedDef,1);
      spjProjSeq.append(getIndex()->getNoOfColumns());
      spjProjSeq.finish();
    }

    // Fill in LookupNode contents (Already allocated, 'startPos' is our handle:
    QN_LookupNode* node = reinterpret_cast<QN_LookupNode*>(serializedDef.addr(startPos));
    if (unlikely(node==NULL)) {
      return Err_MemoryAlloc;
    }
    node->tableId = getIndex()->getObjectId();
    node->tableVersion = getIndex()->getObjectVersion();
    node->requestInfo = requestInfo;
    const Uint32 length = serializedDef.getSize() - startPos;
    if (unlikely(length > 0xFFFF)) {
      return QRY_DEFINITION_TOO_LARGE; //Query definition too large.
    } else {
      QueryNode::setOpLen(node->len, QueryNode::QN_LOOKUP, length);
    }

#ifdef __TRACE_SERIALIZATION
    ndbout << "Serialized index " << getInternalOpNo()-1 << " : ";
    for (Uint32 i = startPos; i < serializedDef.getSize(); i++){
      char buf[12];
      sprintf(buf, "%.8x", serializedDef.get(i));
      ndbout << buf << " ";
    }
    ndbout << endl;
#endif
  } // End: Serialize unique index access

  // Reserve memory for LookupNode, fill in contents later when
  // 'length' and 'requestInfo' has been calculated.
  Uint32 startPos = serializedDef.getSize();
  serializedDef.alloc(QN_LookupNode::NodeSize);
  Uint32 requestInfo = 0;

  /**
   * NOTE: Order of sections within the optional part is fixed as:
   *    Part1:  'NI_HAS_PARENT'
   *    Part2:  'NI_KEY_PARAMS, NI_KEY_LINKED, NI_KEY_CONST'
   *    PART3:  'NI_LINKED_ATTR ++
   */

  // Optional part1: Append index as (single) parent op..
  { requestInfo |= DABits::NI_HAS_PARENT;
    Uint16Sequence parentSeq(serializedDef,1);
    parentSeq.append(getInternalOpNo()-1);
    parentSeq.finish();
  }

  // Part2: Append projected NDB$PK column as index -> table linkage
  {
    requestInfo |= DABits::NI_KEY_LINKED;
    serializedDef.append(1U); // Length: Key pattern contains only the single PK column
    serializedDef.append(QueryPattern::colPk(0));
  }

  // Part3: Columns required by SPJ to instantiate descendant child operations.
  requestInfo |= appendChildProjection(serializedDef);

  // Fill in LookupNode contents (Already allocated, 'startPos' is our handle:
  QN_LookupNode* node = reinterpret_cast<QN_LookupNode*>(serializedDef.addr(startPos));
  if (unlikely(node==NULL)) {
    return Err_MemoryAlloc;
  }
  node->tableId = getTable().getObjectId();
  node->tableVersion = getTable().getObjectVersion();
  node->requestInfo = requestInfo;
  const Uint32 length = serializedDef.getSize() - startPos;
  if (unlikely(length > 0xFFFF)) {
    return QRY_DEFINITION_TOO_LARGE; //Query definition too large.
  } else {
    QueryNode::setOpLen(node->len, QueryNode::QN_LOOKUP, length);
  }

#ifdef __TRACE_SERIALIZATION
  ndbout << "Serialized node " << getInternalOpNo() << " : ";
  for (Uint32 i = startPos; i < serializedDef.getSize(); i++) {
    char buf[12];
    sprintf(buf, "%.8x", serializedDef.get(i));
    ndbout << buf << " ";
  }
  ndbout << endl;
#endif

  return 0;
} // NdbQueryIndexOperationDefImpl::serializeOperation


NdbQueryScanOperationDefImpl::NdbQueryScanOperationDefImpl (
                           const NdbTableImpl& table,
                           const NdbQueryOptionsImpl& options,
                           const char* ident,
                           Uint32      opNo,
                           Uint32      internalOpNo,
                           int& error)
  : NdbQueryOperationDefImpl(table, options, ident, opNo, internalOpNo, error)
{}

int
NdbQueryScanOperationDefImpl::serialize(Uint32Buffer& serializedDef,
                                        const NdbTableImpl& tableOrIndex)
{
  bool isRoot = (getOpNo()==0);

  // This method should only be invoked once.
  assert (!m_isPrepared);
  m_isPrepared = true;
  // Reserve memory for ScanFragNode, fill in contents later when
  // 'length' and 'requestInfo' has been calculated.
  Uint32 startPos = serializedDef.getSize();
  assert (QN_ScanFragNode::NodeSize==QN_ScanIndexNode::NodeSize);
  serializedDef.alloc(QN_ScanFragNode::NodeSize);
  Uint32 requestInfo = 0;

  // Optional part1: Make list of parent nodes.
  requestInfo |= appendParentList (serializedDef);

  // Part2: Append pattern for building upper/lower bounds.
  requestInfo |= appendBoundPattern(serializedDef);

  // Part3: Columns required by SPJ to instantiate descendant child operations.
  requestInfo |= appendChildProjection(serializedDef);

  // Part4: Pattern to creating a prune key for range scan
  requestInfo |= appendPrunePattern(serializedDef);

  const Uint32 length = serializedDef.getSize() - startPos;
  if (unlikely(length > 0xFFFF))
  {
    return QRY_DEFINITION_TOO_LARGE; //Query definition too large.
  }
  // Fill in ScanFragNode/ScanIndexNode contents (Already allocated, 'startPos' is our handle:
  if (isRoot)
  {
    QN_ScanFragNode* node = reinterpret_cast<QN_ScanFragNode*>(serializedDef.addr(startPos));
    if (unlikely(node==NULL)) {
      return Err_MemoryAlloc;
    }
    node->tableId = tableOrIndex.getObjectId();
    node->tableVersion = tableOrIndex.getObjectVersion();
    node->requestInfo = requestInfo;
    QueryNode::setOpLen(node->len, QueryNode::QN_SCAN_FRAG, length);
  }
  else
  {
    QN_ScanIndexNode* node = reinterpret_cast<QN_ScanIndexNode*>(serializedDef.addr(startPos));
    if (unlikely(node==NULL)) {
      return Err_MemoryAlloc;
    }
    node->tableId = tableOrIndex.getObjectId();
    node->tableVersion = tableOrIndex.getObjectVersion();
    // Need NI_REPEAT_SCAN_RESULT if there are star-joined scans
    node->requestInfo = requestInfo | DABits::NI_REPEAT_SCAN_RESULT;
    QueryNode::setOpLen(node->len, QueryNode::QN_SCAN_INDEX, length);
  }

#ifdef __TRACE_SERIALIZATION
  ndbout << "Serialized node " << getInternalOpNo() << " : ";
  for(Uint32 i = startPos; i < serializedDef.getSize(); i++){
    char buf[12];
    sprintf(buf, "%.8x", serializedDef.get(i));
    ndbout << buf << " ";
  }
  ndbout << endl;
#endif
  return 0;
} // NdbQueryScanOperationDefImpl::serialize


int
NdbQueryTableScanOperationDefImpl
::serializeOperation(Uint32Buffer& serializedDef)
{
  return NdbQueryScanOperationDefImpl::serialize(serializedDef, getTable());
} // NdbQueryTableScanOperationDefImpl::serializeOperation


int
NdbQueryIndexScanOperationDefImpl
::serializeOperation(Uint32Buffer& serializedDef)
{
  return NdbQueryScanOperationDefImpl::serialize(serializedDef, *m_index.getIndexTable());
} // NdbQueryIndexScanOperationDefImpl::serializeOperation


// Instantiate Vector templates
template class Vector<NdbQueryOperationDefImpl*>;
template class Vector<NdbQueryOperandImpl*>;

template class Vector<const NdbParamOperandImpl*>;
template class Vector<const NdbColumnImpl*>;

#if 0
/**********************************************
 * Simple hack for module test & experimenting
 **********************************************/
#include <stdio.h>
#include <assert.h>

int
main(int argc, const char** argv)
{
  printf("Hello, I am the unit test for NdbQueryBuilder\n");

  printf("sizeof(NdbQueryOperationDef): %d\n", sizeof(NdbQueryOperationDef));
  printf("sizeof(NdbQueryLookupOperationDef): %d\n", sizeof(NdbQueryLookupOperationDef));

  // Assert that interfaces *only* contain the pimpl pointer:
  assert (sizeof(NdbQueryOperationDef) == sizeof(NdbQueryOperationDefImpl*));
  assert (sizeof(NdbQueryLookupOperationDef) == sizeof(NdbQueryOperationDefImpl*));
  assert (sizeof(NdbQueryTableScanOperationDef) == sizeof(NdbQueryOperationDefImpl*));
  assert (sizeof(NdbQueryIndexScanOperationDef) == sizeof(NdbQueryOperationDefImpl*));

  assert (sizeof(NdbQueryOperand) == sizeof(NdbQueryOperandImpl*));
  assert (sizeof(NdbConstOperand) == sizeof(NdbQueryOperandImpl*));
  assert (sizeof(NdbParamOperand) == sizeof(NdbQueryOperandImpl*));
  assert (sizeof(NdbLinkedOperand) == sizeof(NdbQueryOperandImpl*));

  NdbQueryBuilder* const myBuilder= NdbQueryBuilder::create();

  const NdbDictionary::Table *manager = (NdbDictionary::Table*)0xDEADBEAF;
//  const NdbDictionary::Index *ix = (NdbDictionary::Index*)0x11223344;

  const NdbQueryDef* q1 = 0;
  {
    NdbQueryBuilder* qb = myBuilder;

    const NdbQueryOperand* managerKey[] =  // Manager is indexed om {"dept_no", "emp_no"}
    {  qb->constValue("d005"),             // dept_no = "d005"
       qb->constValue(110567),             // emp_no  = 110567
       0
    };

    const NdbQueryLookupOperationDef *readManager = qb->readTuple(manager, managerKey);
//  if (readManager == NULL) APIERROR(myNdb.getNdbError());
    assert (readManager);

    printf("readManager : %p\n", readManager);
    printf("Index : %p\n", readManager->getIndex());
    printf("Table : %p\n", readManager->getTable());

    q1 = qb->prepare();
//  if (q1 == NULL) APIERROR(qb->getNdbError());
    assert (q1);

    // Some operations are intentionally disallowed through private declaration
//  delete readManager;
//  NdbQueryLookupOperationDef illegalAssign = *readManager;
//  NdbQueryLookupOperationDef *illegalCopy1 = new NdbQueryLookupOperationDef(*readManager);
//  NdbQueryLookupOperationDef illegalCopy2(*readManager);
  }
}

#endif