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3cd706b107
Post-fix for MDEV-35144.
Cannot allocate options values on the statement arena, because
HA_CREATE_INFO is shallow-copied for every execution, so if the
option_list was initially empty, it will be reset for every execution
and any values allocated on the statement arena will be lost.
Cannot allocate option values on the execution arena, because
HA_CREATE_INFO is shallow-copied for every execution, so if the
option_list was initially NOT empty, any values appended to the
end will be preserved and if they're on the execution arena their
content will be destroyed.
Let's use thd->change_item_tree() to save and restore necessary pointers
for every execution.
followup for 3da565c41d
112 lines
4.4 KiB
C++
112 lines
4.4 KiB
C++
/* Copyright (C) 2010 Monty Program Ab
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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 Street, Fifth Floor, Boston, MA 02110-1335 USA */
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/**
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@file
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Engine defined options of tables/fields/keys in CREATE/ALTER TABLE.
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*/
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#ifndef SQL_CREATE_OPTIONS_INCLUDED
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#define SQL_CREATE_OPTIONS_INCLUDED
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#include "sql_class.h"
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enum { ENGINE_OPTION_MAX_LENGTH=32767 };
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class engine_option_value: public Sql_alloc
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{
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public:
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LEX_CSTRING name;
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LEX_CSTRING value;
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engine_option_value *next; ///< parser puts them in a FIFO linked list
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bool parsed; ///< to detect unrecognized options
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bool quoted_value; ///< option=VAL vs. option='VAL'
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engine_option_value(engine_option_value *src,
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engine_option_value **start, engine_option_value **end) :
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name(src->name), value(src->value),
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next(NULL), parsed(src->parsed), quoted_value(src->quoted_value)
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{
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link(start, end);
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}
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engine_option_value(LEX_CSTRING &name_arg, LEX_CSTRING &value_arg,
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bool quoted,
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engine_option_value **start, engine_option_value **end) :
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name(name_arg), value(value_arg),
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next(NULL), parsed(false), quoted_value(quoted)
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{
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link(start, end);
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}
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engine_option_value(LEX_CSTRING &name_arg,
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engine_option_value **start, engine_option_value **end) :
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name(name_arg), value(null_clex_str),
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next(NULL), parsed(false), quoted_value(false)
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{
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link(start, end);
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}
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engine_option_value(LEX_CSTRING &name_arg, ulonglong value_arg,
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engine_option_value **start, engine_option_value **end,
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MEM_ROOT *root) :
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name(name_arg), next(NULL), parsed(false), quoted_value(false)
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{
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char *str;
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if (likely((value.str= str= (char *)alloc_root(root, 22))))
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{
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value.length= longlong10_to_str(value_arg, str, 10) - str;
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link(start, end);
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}
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}
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static uchar *frm_read(const uchar *buff, const uchar *buff_end,
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engine_option_value **start,
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engine_option_value **end, MEM_ROOT *root);
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void link(engine_option_value **start, engine_option_value **end);
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uint frm_length();
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uchar *frm_image(uchar *buff);
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};
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typedef struct st_key KEY;
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class Create_field;
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bool resolve_sysvar_table_options(handlerton *hton);
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void free_sysvar_table_options(handlerton *hton);
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bool parse_engine_table_options(THD *thd, handlerton *ht, TABLE_SHARE *share);
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bool parse_option_list(THD* thd, void *option_struct,
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engine_option_value **option_list,
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ha_create_table_option *rules,
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bool suppress_warning, MEM_ROOT *root);
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bool extend_option_list(THD* thd, handlerton *hton, bool create,
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engine_option_value **option_list,
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ha_create_table_option *rules);
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bool engine_table_options_frm_read(const uchar *buff, size_t length,
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TABLE_SHARE *share);
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engine_option_value *merge_engine_table_options(engine_option_value *source,
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engine_option_value *changes,
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MEM_ROOT *root);
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uint engine_table_options_frm_length(engine_option_value *table_option_list,
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List<Create_field> &create_fields,
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uint keys, KEY *key_info);
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uchar *engine_table_options_frm_image(uchar *buff,
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engine_option_value *table_option_list,
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List<Create_field> &create_fields,
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uint keys, KEY *key_info);
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bool engine_options_differ(void *old_struct, void *new_struct,
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ha_create_table_option *rules);
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bool is_engine_option_known(engine_option_value *opt,
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ha_create_table_option *rules);
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#endif
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