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  1.1707 04/03/19 12:36:55 ram@gw.mysql.r18.ru +4 -0
  Fix for the bug #2976: NATURAL JOIN produces duplicate columns.
This commit is contained in:
unknown 2004-03-30 15:54:26 +05:00
parent 6c937d7153
commit 3004dc7ef2
1 changed files with 10 additions and 6 deletions
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16
sql/sql_base.cc
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@ -2290,16 +2290,20 @@ insert_fields(THD *thd,TABLE_LIST *tables, const char *db_name,
DBUG_RETURN(-1);
#endif
Field **ptr=table->field,*field;
TABLE *natural_join_table;
thd->used_tables|=table->map;
if (table->outer_join ||
!tables->natural_join ||
tables->natural_join->table->outer_join)
natural_join_table= NULL;
else
natural_join_table= tables->natural_join->table;
while ((field = *ptr++))
{
/* Skip duplicate field names if NATURAL JOIN is used */
if (table->outer_join ||
!tables->natural_join ||
tables->natural_join->table->outer_join ||
!find_field_in_table(thd, tables->natural_join->table,
field->field_name, strlen(field->field_name),
0, 0))
if (!natural_join_table ||
!find_field_in_table(thd, natural_join_table, field->field_name,
strlen(field->field_name), 0, 0))
{
Item_field *item= new Item_field(field);
if (!found++)