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MDEV-13897 SELECT @a := MAX(col) FROM t requires full index scan

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fix some old bad merge
This commit is contained in:
Sergei Golubchik
2017-09-26 16:43:54 +02:00
parent 5b01b88e2b
commit f0e9bebd27
5 changed files with 19 additions and 19 deletions
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4
mysql-test/r/variables.result
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@@ -1544,7 +1544,7 @@ one
1
explain SELECT 1 as 'one' FROM t1 GROUP BY @a:= (SELECT ROUND(f1) FROM t1 WHERE f1 = 0);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where
SELECT 1 as 'one' FROM t1 GROUP BY @a:= (SELECT ROUND(f1) FROM t1 WHERE f1 = 0);
one
@@ -1555,7 +1555,7 @@ one
set sql_buffer_result=1;
explain SELECT 1 as 'one' FROM t1 GROUP BY @a:= (SELECT ROUND(f1) FROM t1 WHERE f1 = 0);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using temporary
2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using where
SELECT 1 as 'one' FROM t1 GROUP BY @a:= (SELECT ROUND(f1) FROM t1 WHERE f1 = 0);
one