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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-13 12:24:36 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-13 12:24:36 +0000
commit06eaf7232e9a920468c0f8d74dcf2fe8b555501c (patch)
treee2c7b5777f728320e5b5542b6213fd3591ba51e2 /sql/sql_truncate.h
parentInitial commit. (diff)
downloadmariadb-06eaf7232e9a920468c0f8d74dcf2fe8b555501c.tar.xz
mariadb-06eaf7232e9a920468c0f8d74dcf2fe8b555501c.zip
Adding upstream version 1:10.11.6.upstream/1%10.11.6
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sql/sql_truncate.h')
-rw-r--r--sql/sql_truncate.h71
1 files changed, 71 insertions, 0 deletions
diff --git a/sql/sql_truncate.h b/sql/sql_truncate.h
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+#ifndef SQL_TRUNCATE_INCLUDED
+#define SQL_TRUNCATE_INCLUDED
+/* Copyright (c) 2010, 2014, Oracle and/or its affiliates. All rights reserved.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; version 2 of the License.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
+
+class THD;
+struct TABLE_LIST;
+
+/**
+ Sql_cmd_truncate_table represents the TRUNCATE statement.
+*/
+class Sql_cmd_truncate_table : public Sql_cmd
+{
+private:
+ /* Set if a lock must be downgraded after truncate is done. */
+ MDL_ticket *m_ticket_downgrade;
+
+public:
+ /**
+ Constructor, used to represent a TRUNCATE statement.
+ */
+ Sql_cmd_truncate_table() = default;
+
+ virtual ~Sql_cmd_truncate_table() = default;
+
+ /**
+ Execute a TRUNCATE statement at runtime.
+ @param thd the current thread.
+ @return false on success.
+ */
+ bool execute(THD *thd);
+
+ virtual enum_sql_command sql_command_code() const
+ {
+ return SQLCOM_TRUNCATE;
+ }
+
+protected:
+ enum truncate_result{
+ TRUNCATE_OK=0,
+ TRUNCATE_FAILED_BUT_BINLOG,
+ TRUNCATE_FAILED_SKIP_BINLOG
+ };
+
+ /** Handle locking a base table for truncate. */
+ bool lock_table(THD *, TABLE_LIST *, bool *);
+
+ /** Truncate table via the handler method. */
+ enum truncate_result handler_truncate(THD *, TABLE_LIST *, bool);
+
+ /**
+ Optimized delete of all rows by doing a full regenerate of the table.
+ Depending on the storage engine, it can be accomplished through a
+ drop and recreate or via the handler truncate method.
+ */
+ bool truncate_table(THD *, TABLE_LIST *);
+};
+
+#endif