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MDEV-34860 Implement MAX_EXECUTION_TIME hint

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It places a limit N (a timeout value in milliseconds) on how long
a statement is permitted to execute before the server terminates it.

Syntax:
SELECT /*+ MAX_EXECUTION_TIME(milliseconds) */ ...

Only top-level SELECT statements support the hint.
This commit is contained in:
Oleg Smirnov
2024-08-07 22:10:50 +07:00
parent 1e2774d829
commit 67319f3e8d
20 changed files with 573 additions and 51 deletions
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4
sql/sql_delete.cc
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@@ -1880,11 +1880,11 @@ bool Sql_cmd_delete::prepare_inner(THD *thd)
if (setup_tables_and_check_access(thd, &select_lex->context,
&select_lex->top_join_list,
table_list, select_lex->leaf_tables,
false, DELETE_ACL, SELECT_ACL, true))
false, DELETE_ACL, SELECT_ACL, true, false))
DBUG_RETURN(TRUE);
if (setup_tables(thd, &select_lex->context, &select_lex->top_join_list,
table_list, select_lex->leaf_tables, false, false))
table_list, select_lex->leaf_tables, false, false, true))
DBUG_RETURN(TRUE);
if (!multitable)