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Bug#15463: EXPLAIN SELECT..INTO hangs the client (QB, command line)

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There were two distict bugs: parse error was returned for valid
statement and that error wasn't reported to the client.

The fix ensures that EXPLAIN SELECT..INTO is accepted by parser and any
other parse error will be reported to the client.
This commit is contained in:
kroki@mysql.com 2006-05-03 18:02:43 +04:00
parent c40f8557dc
commit 96f0aa3cfb
4 changed files with 29 additions and 5 deletions
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4
mysql-test/r/explain.result
View File

@ -53,3 +53,7 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE ÔÁÂ ref ÉÎÄ0,ÉÎÄ01 ÉÎÄ0 5 const 1 Using where; Using index 1 SIMPLE ÔÁÂ ref ÉÎÄ0,ÉÎÄ01 ÉÎÄ0 5 const 1 Using where; Using index
drop table ÔÁÂ; drop table ÔÁÂ;
set names latin1; set names latin1;
select 3 into @v1;
explain select 3 into @v1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used

9
mysql-test/t/explain.test
View File

@ -43,3 +43,12 @@ drop table
set names latin1; set names latin1;
# End of 4.1 tests # End of 4.1 tests
#
# Bug#15463: EXPLAIN SELECT..INTO hangs the client (QB, command line)
#
select 3 into @v1;
explain select 3 into @v1;
# End of 5.0 tests.

1
sql/sql_parse.cc
View File

@ -5709,6 +5709,7 @@ void mysql_parse(THD *thd, char *inBuf, uint length)
} }
else else
{ {
DBUG_ASSERT(thd->net.report_error);
DBUG_PRINT("info",("Command aborted. Fatal_error: %d", DBUG_PRINT("info",("Command aborted. Fatal_error: %d",
thd->is_fatal_error)); thd->is_fatal_error));
query_cache_abort(&thd->net); query_cache_abort(&thd->net);

20
sql/sql_yacc.yy
View File

@ -5795,7 +5795,11 @@ select_var_ident:
if (lex->result) if (lex->result)
((select_dumpvar *)lex->result)->var_list.push_back( new my_var($2,0,0,(enum_field_types)0)); ((select_dumpvar *)lex->result)->var_list.push_back( new my_var($2,0,0,(enum_field_types)0));
else else
YYABORT; /*
The parser won't create select_result instance only
if it's an EXPLAIN.
*/
DBUG_ASSERT(lex->describe);
} }
| ident_or_text | ident_or_text
{ {
@ -5807,10 +5811,8 @@ select_var_ident:
my_error(ER_SP_UNDECLARED_VAR, MYF(0), $1.str); my_error(ER_SP_UNDECLARED_VAR, MYF(0), $1.str);
YYABORT; YYABORT;
} }
if (! lex->result) if (lex->result)
YYABORT; {
else
{
my_var *var; my_var *var;
((select_dumpvar *)lex->result)-> ((select_dumpvar *)lex->result)->
var_list.push_back(var= new my_var($1,1,t->offset,t->type)); var_list.push_back(var= new my_var($1,1,t->offset,t->type));
@ -5818,6 +5820,14 @@ select_var_ident:
if (var) if (var)
var->sp= lex->sphead; var->sp= lex->sphead;
#endif #endif
}
else
{
/*
The parser won't create select_result instance only
if it's an EXPLAIN.
*/
DBUG_ASSERT(lex->describe);
} }
} }
; ;