1<?php
2
3/*
4V4.94 23 Jan 2007  (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved.
5  Released under both BSD license and Lesser GPL library license.
6  Whenever there is any discrepancy between the two licenses,
7  the BSD license will take precedence.
8  Set tabs to 8.
9
10*/
11
12class ADODB_pdo_pgsql extends ADODB_pdo {
13	var $metaDatabasesSQL = "select datname from pg_database where datname not in ('template0','template1') order by 1";
14    var $metaTablesSQL = "select tablename,'T' from pg_tables where tablename not like 'pg\_%'
15	and tablename not in ('sql_features', 'sql_implementation_info', 'sql_languages',
16	 'sql_packages', 'sql_sizing', 'sql_sizing_profiles')
17	union
18        select viewname,'V' from pg_views where viewname not like 'pg\_%'";
19	//"select tablename from pg_tables where tablename not like 'pg_%' order by 1";
20	var $isoDates = true; // accepts dates in ISO format
21	var $sysDate = "CURRENT_DATE";
22	var $sysTimeStamp = "CURRENT_TIMESTAMP";
23	var $blobEncodeType = 'C';
24	var $metaColumnsSQL = "SELECT a.attname,t.typname,a.attlen,a.atttypmod,a.attnotnull,a.atthasdef,a.attnum
25		FROM pg_class c, pg_attribute a,pg_type t
26		WHERE relkind in ('r','v') AND (c.relname='%s' or c.relname = lower('%s')) and a.attname not like '....%%'
27AND a.attnum > 0 AND a.atttypid = t.oid AND a.attrelid = c.oid ORDER BY a.attnum";
28
29	// used when schema defined
30	var $metaColumnsSQL1 = "SELECT a.attname, t.typname, a.attlen, a.atttypmod, a.attnotnull, a.atthasdef, a.attnum
31FROM pg_class c, pg_attribute a, pg_type t, pg_namespace n
32WHERE relkind in ('r','v') AND (c.relname='%s' or c.relname = lower('%s'))
33 and c.relnamespace=n.oid and n.nspname='%s'
34	and a.attname not like '....%%' AND a.attnum > 0
35	AND a.atttypid = t.oid AND a.attrelid = c.oid ORDER BY a.attnum";
36
37	// get primary key etc -- from Freek Dijkstra
38	var $metaKeySQL = "SELECT ic.relname AS index_name, a.attname AS column_name,i.indisunique AS unique_key, i.indisprimary AS primary_key
39	FROM pg_class bc, pg_class ic, pg_index i, pg_attribute a WHERE bc.oid = i.indrelid AND ic.oid = i.indexrelid AND (i.indkey[0] = a.attnum OR i.indkey[1] = a.attnum OR i.indkey[2] = a.attnum OR i.indkey[3] = a.attnum OR i.indkey[4] = a.attnum OR i.indkey[5] = a.attnum OR i.indkey[6] = a.attnum OR i.indkey[7] = a.attnum) AND a.attrelid = bc.oid AND bc.relname = '%s'";
40
41	var $hasAffectedRows = true;
42	var $hasLimit = false;	// set to true for pgsql 7 only. support pgsql/mysql SELECT * FROM TABLE LIMIT 10
43	// below suggested by Freek Dijkstra
44	var $true = 't';		// string that represents TRUE for a database
45	var $false = 'f';		// string that represents FALSE for a database
46	var $fmtDate = "'Y-m-d'";	// used by DBDate() as the default date format used by the database
47	var $fmtTimeStamp = "'Y-m-d G:i:s'"; // used by DBTimeStamp as the default timestamp fmt.
48	var $hasMoveFirst = true;
49	var $hasGenID = true;
50	var $_genIDSQL = "SELECT NEXTVAL('%s')";
51	var $_genSeqSQL = "CREATE SEQUENCE %s START %s";
52	var $_dropSeqSQL = "DROP SEQUENCE %s";
53	var $metaDefaultsSQL = "SELECT d.adnum as num, d.adsrc as def from pg_attrdef d, pg_class c where d.adrelid=c.oid and c.relname='%s' order by d.adnum";
54	var $random = 'random()';		/// random function
55	var $concat_operator='||';
56
57	function _init($parentDriver)
58	{
59
60		$parentDriver->hasTransactions = false; ## <<< BUG IN PDO pgsql driver
61		$parentDriver->hasInsertID = true;
62		$parentDriver->_nestedSQL = true;
63	}
64
65	function ServerInfo()
66	{
67		$arr['description'] = ADOConnection::GetOne("select version()");
68		$arr['version'] = ADOConnection::_findvers($arr['description']);
69		return $arr;
70	}
71
72	function &SelectLimit($sql,$nrows=-1,$offset=-1,$inputarr=false,$secs2cache=0)
73	{
74		 $offsetStr = ($offset >= 0) ? " OFFSET $offset" : '';
75		 $limitStr  = ($nrows >= 0)  ? " LIMIT $nrows" : '';
76		 if ($secs2cache)
77		  	$rs =& $this->CacheExecute($secs2cache,$sql."$limitStr$offsetStr",$inputarr);
78		 else
79		  	$rs =& $this->Execute($sql."$limitStr$offsetStr",$inputarr);
80
81		return $rs;
82	}
83
84	function &MetaTables($ttype=false,$showSchema=false,$mask=false)
85	{
86		$info = $this->ServerInfo();
87		if ($info['version'] >= 7.3) {
88	    	$this->metaTablesSQL = "select tablename,'T' from pg_tables where tablename not like 'pg\_%'
89			  and schemaname  not in ( 'pg_catalog','information_schema')
90	union
91        select viewname,'V' from pg_views where viewname not like 'pg\_%'  and schemaname  not in ( 'pg_catalog','information_schema') ";
92		}
93		if ($mask) {
94			$save = $this->metaTablesSQL;
95			$mask = $this->qstr(strtolower($mask));
96			if ($info['version']>=7.3)
97				$this->metaTablesSQL = "
98select tablename,'T' from pg_tables where tablename like $mask and schemaname not in ( 'pg_catalog','information_schema')
99 union
100select viewname,'V' from pg_views where viewname like $mask and schemaname  not in ( 'pg_catalog','information_schema')  ";
101			else
102				$this->metaTablesSQL = "
103select tablename,'T' from pg_tables where tablename like $mask
104 union
105select viewname,'V' from pg_views where viewname like $mask";
106		}
107		$ret =& ADOConnection::MetaTables($ttype,$showSchema);
108
109		if ($mask) {
110			$this->metaTablesSQL = $save;
111		}
112		return $ret;
113	}
114
115	function &MetaColumns($table,$normalize=true)
116	{
117	global $ADODB_FETCH_MODE;
118
119		$schema = false;
120		$this->_findschema($table,$schema);
121
122		if ($normalize) $table = strtolower($table);
123
124		$save = $ADODB_FETCH_MODE;
125		$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
126		if ($this->fetchMode !== false) $savem = $this->SetFetchMode(false);
127
128		if ($schema) $rs =& $this->Execute(sprintf($this->metaColumnsSQL1,$table,$table,$schema));
129		else $rs =& $this->Execute(sprintf($this->metaColumnsSQL,$table,$table));
130		if (isset($savem)) $this->SetFetchMode($savem);
131		$ADODB_FETCH_MODE = $save;
132
133		if ($rs === false) {
134			$false = false;
135			return $false;
136		}
137		if (!empty($this->metaKeySQL)) {
138			// If we want the primary keys, we have to issue a separate query
139			// Of course, a modified version of the metaColumnsSQL query using a
140			// LEFT JOIN would have been much more elegant, but postgres does
141			// not support OUTER JOINS. So here is the clumsy way.
142
143			$ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
144
145			$rskey = $this->Execute(sprintf($this->metaKeySQL,($table)));
146			// fetch all result in once for performance.
147			$keys =& $rskey->GetArray();
148			if (isset($savem)) $this->SetFetchMode($savem);
149			$ADODB_FETCH_MODE = $save;
150
151			$rskey->Close();
152			unset($rskey);
153		}
154
155		$rsdefa = array();
156		if (!empty($this->metaDefaultsSQL)) {
157			$ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
158			$sql = sprintf($this->metaDefaultsSQL, ($table));
159			$rsdef = $this->Execute($sql);
160			if (isset($savem)) $this->SetFetchMode($savem);
161			$ADODB_FETCH_MODE = $save;
162
163			if ($rsdef) {
164				while (!$rsdef->EOF) {
165					$num = $rsdef->fields['num'];
166					$s = $rsdef->fields['def'];
167					if (strpos($s,'::')===false && substr($s, 0, 1) == "'") { /* quoted strings hack... for now... fixme */
168						$s = substr($s, 1);
169						$s = substr($s, 0, strlen($s) - 1);
170					}
171
172					$rsdefa[$num] = $s;
173					$rsdef->MoveNext();
174				}
175			} else {
176				ADOConnection::outp( "==> SQL => " . $sql);
177			}
178			unset($rsdef);
179		}
180
181		$retarr = array();
182		while (!$rs->EOF) {
183			$fld = new ADOFieldObject();
184			$fld->name = $rs->fields[0];
185			$fld->type = $rs->fields[1];
186			$fld->max_length = $rs->fields[2];
187			if ($fld->max_length <= 0) $fld->max_length = $rs->fields[3]-4;
188			if ($fld->max_length <= 0) $fld->max_length = -1;
189			if ($fld->type == 'numeric') {
190				$fld->scale = $fld->max_length & 0xFFFF;
191				$fld->max_length >>= 16;
192			}
193			// dannym
194			// 5 hasdefault; 6 num-of-column
195			$fld->has_default = ($rs->fields[5] == 't');
196			if ($fld->has_default) {
197				$fld->default_value = $rsdefa[$rs->fields[6]];
198			}
199
200			//Freek
201			if ($rs->fields[4] == $this->true) {
202				$fld->not_null = true;
203			}
204
205			// Freek
206			if (is_array($keys)) {
207				foreach($keys as $key) {
208					if ($fld->name == $key['column_name'] AND $key['primary_key'] == $this->true)
209						$fld->primary_key = true;
210					if ($fld->name == $key['column_name'] AND $key['unique_key'] == $this->true)
211						$fld->unique = true; // What name is more compatible?
212				}
213			}
214
215			if ($ADODB_FETCH_MODE == ADODB_FETCH_NUM) $retarr[] = $fld;
216			else $retarr[($normalize) ? strtoupper($fld->name) : $fld->name] = $fld;
217
218			$rs->MoveNext();
219		}
220		$rs->Close();
221		if (empty($retarr)) {
222			$false = false;
223			return $false;
224		} else return $retarr;
225
226	}
227
228}
229
230?>
231