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A fix and test case for Bug#6050 "EXECUTE stmt reports ambiguous field

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names with ident. tables fr. diff. schemata": revise all uses of
Item_field and make them prepared-statements friendly when necessary.
This commit is contained in:
konstantin@mysql.com
2004-10-22 14:47:35 +04:00
parent b686f98f50
commit a7c52d755b
9 changed files with 130 additions and 19 deletions
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24
sql/sql_union.cc
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@ -266,14 +266,14 @@ int st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
if (first_select->next_select())
{
// it is not single select
/* This is not a single select */
/*
Check that it was possible to aggregate
all collations together for UNION.
*/
List_iterator_fast<Item> tp(types);
Item_arena *arena= thd->current_arena;
Item *type;
while ((type= tp++))
{
@ -305,7 +305,11 @@ int st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
thd_arg->lex->current_select= lex_select_save;
if (!item_list.elements)
{
Item_arena *arena= thd->current_arena, backup;
/*
We're in statement prepare or in execution
of a conventional statement.
*/
Item_arena backup;
if (arena->is_stmt_prepare())
thd->set_n_backup_item_arena(arena, &backup);
Field **field;
@ -345,6 +349,20 @@ int st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
fake_select_lex->table_list.empty();
}
}
else if (arena->is_stmt_execute())
{
/*
We're in execution of a prepared statement: reset field items
to point at fields from the created temporary table.
*/
List_iterator_fast<Item> it(item_list);
for (Field **field= table->field; *field; field++)
{
Item_field *item_field= (Item_field*) it++;
DBUG_ASSERT(item_field);
item_field->set_field(*field);
}
}
}
else
first_select->braces= 0; // remove our changes