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Bug#11829785 EXPLAIN EXTENDED CRASH WITH RIGHT OUTER JOIN, SUBQUERIES

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This is a backport of
Bug #46860 Crash/segfault using EXPLAIN EXTENDED on query using UNION in subquery.
This commit is contained in:
Tor Didriksen
2011-03-24 11:27:11 +01:00
parent 3e762332ec
commit 4a6d020e8d
5 changed files with 41 additions and 7 deletions
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6
sql/sql_parse.cc
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@@ -4434,7 +4434,11 @@ static bool execute_sqlcom_select(THD *thd, TABLE_LIST *all_tables)
return 1; /* purecov: inspected */
thd->send_explain_fields(result);
res= mysql_explain_union(thd, &thd->lex->unit, result);
if (lex->describe & DESCRIBE_EXTENDED)
/*
The code which prints the extended description is not robust
against malformed queries, so skip it if we have an error.
*/
if (!res && (lex->describe & DESCRIBE_EXTENDED))
{
char buff[1024];
String str(buff,(uint32) sizeof(buff), system_charset_info);