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Limit calculated rows to the number of rows in the table

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The result file changes are mainly that number of rows is one smaller
for some queries with DISTINCT or GROUP BY
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Monty
2021-10-06 02:39:59 +03:00
committed by Sergei Petrunia
parent c443dbff0e
commit 87d4d7232c
12 changed files with 43 additions and 37 deletions
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2
mysql-test/main/explain_innodb.result
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@ -15,6 +15,6 @@ explain
SELECT * FROM (SELECT id FROM t1 GROUP BY id) dt WHERE 1=0;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
2 DERIVED t1 range NULL id 53 NULL 2 Using index for group-by
2 DERIVED t1 range NULL id 53 NULL 1 Using index for group-by
SET GLOBAL slow_query_log = @sql_tmp;
drop table t1;