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Fix bug #11864 non unique names are allowed in subquery

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Column names weren't checked for uniqueness for subqueries.

Code for names uniqueness checking used for view creation moved into 
separate function named check_duplicate_names(). It's called on 
preparation of subqueries to check uniqueness of names. If duplicate names 
are found then error is raised.
This commit is contained in:
evgen@moonbone.local
2005-08-10 17:45:00 +04:00
parent 5d3b406799
commit baf0c9ad08
7 changed files with 92 additions and 33 deletions
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5
sql/sql_derived.cc
View File

@@ -125,6 +125,11 @@ int mysql_derived_prepare(THD *thd, LEX *lex, TABLE_LIST *orig_table_list)
if ((res= unit->prepare(thd, derived_result, 0, orig_table_list->alias)))
goto exit;
if (check_duplicate_names(unit->types, 0))
{
res= -1;
goto exit;
}
derived_result->tmp_table_param.init();
derived_result->tmp_table_param.field_count= unit->types.elements;