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removed wrong distinct UNION detection (BUG#6565)

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bell@sanja.is.com.ua
2005-02-14 02:06:21 +02:00
parent 961d8b0ebf
commit 2d3076b69d
3 changed files with 39 additions and 2 deletions
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10
sql/sql_derived.cc
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@@ -132,10 +132,16 @@ static int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *unit,
/*
Temp table is created so that it hounours if UNION without ALL is to be
processed
As 'distinct' parameter we always pass FALSE (0), because underlying
query will control distinct condition by itself. Correct test of
distinct underlying query will be is_union &&
!unit->union_distinct->next_select() (i.e. it is union and last distinct
SELECT is last SELECT of UNION).
*/
if (!(table= create_tmp_table(thd, &derived_result->tmp_table_param,
unit->types, (ORDER*) 0,
is_union && unit->union_distinct, 1,
unit->types, (ORDER*) 0,
FALSE, 1,
(first_select->options | thd->options |
TMP_TABLE_ALL_COLUMNS),
HA_POS_ERROR,