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#ifndef DRIZZLED_HANDLER_STRUCTS_H
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#define DRIZZLED_HANDLER_STRUCTS_H
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#if TIME_WITH_SYS_TIME
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# include <sys/time.h>
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# include <sys/time.h>
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#include <drizzled/base.h>
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#include <drizzled/structs.h>
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#include <drizzled/definitions.h>
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#include <drizzled/lex_string.h>
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#include "drizzled/global_charset_info.h"
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typedef struct st_key KEY;
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typedef struct st_key_cache KEY_CACHE;
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class StorageEngine;
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/* true is not all entries in the engines[] support 2pc */
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/* storage engines that registered in this transaction */
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The purpose of this flag is to keep track of non-transactional
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tables that were modified in scope of:
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- transaction, when the variable is a member of
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Session::transaction.all
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- top-level statement or sub-statement, when the variable is a
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member of Session::transaction.stmt
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This member has the following life cycle:
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* stmt.modified_non_trans_table is used to keep track of
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modified non-transactional tables of top-level statements. At
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the end of the previous statement and at the beginning of the session,
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it is reset to false. If such functions
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as mysql_insert, mysql_update, mysql_delete etc modify a
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non-transactional table, they set this flag to true. At the
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end of the statement, the value of stmt.modified_non_trans_table
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is merged with all.modified_non_trans_table and gets reset.
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* all.modified_non_trans_table is reset at the end of transaction
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* Since we do not have a dedicated context for execution of a
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sub-statement, to keep track of non-transactional changes in a
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sub-statement, we re-use stmt.modified_non_trans_table.
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At entrance into a sub-statement, a copy of the value of
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stmt.modified_non_trans_table (containing the changes of the
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outer statement) is saved on stack. Then
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stmt.modified_non_trans_table is reset to false and the
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substatement is executed. Then the new value is merged with the
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bool modified_non_trans_table;
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void reset() { no_2pc= false; modified_non_trans_table= false; }
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typedef struct st_ha_create_information