103 lines
3.8 KiB
C++
103 lines
3.8 KiB
C++
#ifndef SQL_TMP_TABLE_INCLUDED
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#define SQL_TMP_TABLE_INCLUDED
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/* Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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/**
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@file
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@brief
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Temporary table handling functions.
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*/
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#include "my_global.h"
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#include "my_base.h" // ha_rows
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#include "item.h" // Item
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class Create_field;
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class Field;
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class Opt_trace_context;
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class SJ_TMP_TABLE;
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class Temp_table_param;
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class THD;
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struct TABLE;
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template<typename Element_type, bool has_trivial_destructor>
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class Mem_root_array;
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template <class T> class List;
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typedef struct st_columndef MI_COLUMNDEF;
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typedef struct st_key KEY;
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typedef struct st_order ORDER;
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typedef Mem_root_array<Item*, true> Func_ptr_array;
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/*
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For global system variable internal_tmp_disk_storage_engine
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*/
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enum enum_internal_tmp_disk_storage_engine { TMP_TABLE_MYISAM, TMP_TABLE_INNODB };
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TABLE *
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create_tmp_table(THD *thd, Temp_table_param *param, List<Item> &fields,
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ORDER *group, bool distinct, bool save_sum_fields,
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ulonglong select_options, ha_rows rows_limit,
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const char *table_alias);
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/**
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General routine to change field->ptr of a NULL-terminated array of Field
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objects. Useful when needed to call val_int, val_str or similar and the
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field data is not in table->record[0] but in some other structure.
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set_key_field_ptr changes all fields of an index using a key_info object.
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All methods presume that there is at least one field to change.
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*/
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TABLE *create_virtual_tmp_table(THD *thd, List<Create_field> &field_list);
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bool create_ondisk_from_heap(THD *thd, TABLE *table,
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MI_COLUMNDEF *start_recinfo,
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MI_COLUMNDEF **recinfo,
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int error, bool ignore_last_dup,
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bool *is_duplicate);
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void free_tmp_table(THD *thd, TABLE *entry);
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TABLE *create_duplicate_weedout_tmp_table(THD *thd,
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uint uniq_tuple_length_arg,
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SJ_TMP_TABLE *sjtbl);
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bool instantiate_tmp_table(TABLE *table, KEY *keyinfo,
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MI_COLUMNDEF *start_recinfo,
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MI_COLUMNDEF **recinfo,
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ulonglong options, my_bool big_tables,
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Opt_trace_context *trace);
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Field *create_tmp_field(THD *thd, TABLE *table,Item *item, Item::Type type,
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Func_ptr_array *copy_func, Field **from_field,
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Field **default_field,
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bool group, bool modify_item,
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bool table_cant_handle_bit_fields,
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bool make_copy_field);
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Field* create_tmp_field_from_field(THD *thd, Field* org_field,
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const char *name, TABLE *table,
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Item_field *item);
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/**
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Get the minimum of max_key_length and max_key_part_length between
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HEAP engine and internal_tmp_disk_storage_engine.
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*/
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void get_max_key_and_part_length(uint *max_key_length,
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uint *max_key_part_length);
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/**
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Initilize the storage engine properties for the alternative temporary table
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storage engines.
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*/
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void init_cache_tmp_engine_properties();
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#endif /* SQL_TMP_TABLE_INCLUDED */
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