1 #ifndef PARTITION_ELEMENT_INCLUDED 2 #define PARTITION_ELEMENT_INCLUDED 3 4 /* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; version 2 of the License. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, write to the Free Software 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ 18 19 #include "my_base.h" /* ha_rows */ 20 #include "handler.h" /* UNDEF_NODEGROUP */ 21 22 /** 23 * An enum and a struct to handle partitioning and subpartitioning. 24 */ 25 enum partition_type { 26 NOT_A_PARTITION= 0, 27 RANGE_PARTITION, 28 HASH_PARTITION, 29 LIST_PARTITION 30 }; 31 32 enum partition_state { 33 PART_NORMAL= 0, 34 PART_IS_DROPPED= 1, 35 PART_TO_BE_DROPPED= 2, 36 PART_TO_BE_ADDED= 3, 37 PART_TO_BE_REORGED= 4, 38 PART_REORGED_DROPPED= 5, 39 PART_CHANGED= 6, 40 PART_IS_CHANGED= 7, 41 PART_IS_ADDED= 8, 42 PART_ADMIN= 9 43 }; 44 45 /* 46 This struct is used to keep track of column expressions as part 47 of the COLUMNS concept in conjunction with RANGE and LIST partitioning. 48 The value can be either of MINVALUE, MAXVALUE and an expression that 49 must be constant and evaluate to the same type as the column it 50 represents. 51 52 The data in this fixed in two steps. The parser will only fill in whether 53 it is a max_value or provide an expression. Filling in 54 column_value, part_info, partition_id, null_value is done by the 55 function fix_column_value_function. However the item tree needs 56 fixed also before writing it into the frm file (in add_column_list_values). 57 To distinguish between those two variants, fixed= 1 after the 58 fixing in add_column_list_values and fixed= 2 otherwise. This is 59 since the fixing in add_column_list_values isn't a complete fixing. 60 */ 61 62 typedef struct p_column_list_val 63 { 64 void* column_value; 65 Item* item_expression; 66 partition_info *part_info; 67 uint partition_id; 68 bool max_value; 69 bool null_value; 70 char fixed; 71 } part_column_list_val; 72 73 74 /* 75 This struct is used to contain the value of an element 76 in the VALUES IN struct. It needs to keep knowledge of 77 whether it is a signed/unsigned value and whether it is 78 NULL or not. 79 */ 80 81 typedef struct p_elem_val 82 { 83 longlong value; 84 uint added_items; 85 bool null_value; 86 bool unsigned_flag; 87 part_column_list_val *col_val_array; 88 } part_elem_value; 89 90 struct st_ddl_log_memory_entry; 91 92 class partition_element :public Sql_alloc { 93 public: 94 List<partition_element> subpartitions; 95 List<part_elem_value> list_val_list; 96 ha_rows part_max_rows; 97 ha_rows part_min_rows; 98 longlong range_value; 99 char *partition_name; 100 char *tablespace_name; 101 struct st_ddl_log_memory_entry *log_entry; 102 char* part_comment; 103 char* data_file_name; 104 char* index_file_name; 105 handlerton *engine_type; 106 enum partition_state part_state; 107 uint16 nodegroup_id; 108 bool has_null_value; 109 bool signed_flag; // Range value signed 110 bool max_value; // MAXVALUE range 111 partition_element()112 partition_element() 113 : part_max_rows(0), part_min_rows(0), range_value(0), 114 partition_name(NULL), tablespace_name(NULL), 115 log_entry(NULL), part_comment(NULL), 116 data_file_name(NULL), index_file_name(NULL), 117 engine_type(NULL), part_state(PART_NORMAL), 118 nodegroup_id(UNDEF_NODEGROUP), has_null_value(FALSE), 119 signed_flag(FALSE), max_value(FALSE) 120 { 121 } partition_element(partition_element * part_elem)122 partition_element(partition_element *part_elem) 123 : part_max_rows(part_elem->part_max_rows), 124 part_min_rows(part_elem->part_min_rows), 125 range_value(0), partition_name(NULL), 126 tablespace_name(part_elem->tablespace_name), 127 part_comment(part_elem->part_comment), 128 data_file_name(part_elem->data_file_name), 129 index_file_name(part_elem->index_file_name), 130 engine_type(part_elem->engine_type), 131 part_state(part_elem->part_state), 132 nodegroup_id(part_elem->nodegroup_id), 133 has_null_value(FALSE) 134 { 135 } ~partition_element()136 ~partition_element() {} 137 }; 138 139 #endif /* PARTITION_ELEMENT_INCLUDED */ 140