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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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2
sql/sql_help.cc
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@@ -801,7 +801,7 @@ static bool init_items_for_help_command(THD *thd,
if (setup_tables(thd, &first_select_lex->context,
&first_select_lex->top_join_list,
&tables[0], leaves, false, false))
&tables[0], leaves, false, false, true))
return true;
memcpy((char*) used_fields, (char*) init_used_fields,