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This patch enables select handler for executing prepared statements. Most importantly, we are now activating a persistent arena which will allocate any new items in a permanent MEMROOT for prepared statements and stored procedures. Refer to JOIN::optimize_inner() for details. In processWhere(), we now use SELECT_LEX::prep_where in case we are executing a prepared statement, as this is where the saved WHERE clause is stored for prepared statement processing. In addition, we also disable derived handler for prepared statements.
31 lines
1.1 KiB
C
31 lines
1.1 KiB
C
/* Copyright (C) 2019 MariaDB Corporation
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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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,
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MA 02110-1301, USA. */
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#ifndef HA_MCS_REWRITES
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#define HA_MCS_REWRITES
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#include "idb_mysql.h"
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bool in_subselect_rewrite(SELECT_LEX *select_lex);
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void opt_flag_unset_PS(SELECT_LEX *select_lex);
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COND *simplify_joins_mcs(JOIN *join, List<TABLE_LIST> *join_list,
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COND *conds, bool top, bool in_sj);
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uint build_bitmap_for_nested_joins_mcs(List<TABLE_LIST> *join_list,
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uint first_unused);
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#endif
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