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91 lines
3.6 KiB
91 lines
3.6 KiB
5 months ago
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#ifndef SQL_TMP_TABLE_INCLUDED
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#define SQL_TMP_TABLE_INCLUDED
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/* Copyright (c) 2000, 2018, 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, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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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, version 2.0, 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 <stddef.h>
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#include <sys/types.h>
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#include "my_base.h" // ha_rows
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#include "my_inttypes.h"
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#include "sql/item.h" // Item
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#include "sql/mem_root_array.h"
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#include "sql/temp_table_param.h"
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class Create_field;
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class Field;
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class KEY;
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class SJ_TMP_TABLE;
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class THD;
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struct ORDER;
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struct TABLE;
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template <class T>
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class List;
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enum enum_internal_tmp_mem_storage_engine {
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TMP_TABLE_MEMORY,
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TMP_TABLE_TEMPTABLE
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};
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TABLE *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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bool open_tmp_table(TABLE *table);
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TABLE *create_tmp_table_from_fields(THD *thd, List<Create_field> &field_list,
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bool is_virtual = true,
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ulonglong select_options = 0,
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const char *alias = NULL);
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bool create_ondisk_from_heap(THD *thd, TABLE *table, int error,
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bool ignore_last_dup, 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, uint uniq_tuple_length_arg,
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SJ_TMP_TABLE *sjtbl);
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bool instantiate_tmp_table(THD *thd, TABLE *table);
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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, bool group, bool modify_item,
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bool table_cant_handle_bit_fields, bool make_copy_field,
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bool copy_result_field = false);
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Field *create_tmp_field_from_field(THD *thd, Field *org_field, const char *name,
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TABLE *table, 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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uint *max_key_parts);
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void init_cache_tmp_engine_properties();
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void encode_innodb_position(uchar *rowid_bytes, uint length, ha_rows row_num);
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bool reposition_innodb_cursor(TABLE *table, ha_rows row_num);
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#endif /* SQL_TMP_TABLE_INCLUDED */
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