Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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5.5(EOL), 10.0(EOL), 10.1(EOL), 10.2(EOL)
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None
Description
DROP TABLE IF EXISTS t1;
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CREATE TABLE t1 (
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id int(11) NOT NULL PRIMARY KEY,
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country varchar(32),
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code int(11) default NULL
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);
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INSERT INTO t1 VALUES (1,'ITALY',100),(2,'ITALY',200),(3,'FRANCE',100), (4,'ITALY',100);
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DROP VIEW IF EXISTS v1;
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CREATE VIEW v1 AS SELECT * FROM t1;
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DROP TABLE IF EXISTS t2;
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CREATE TABLE t2 AS
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SELECT code, COUNT(DISTINCT country), MAX(id) FROM t1 GROUP BY code ORDER BY MAX(id);
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SHOW CREATE TABLE t2;
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returns
+-------+----------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| Table | Create Table |
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+-------+----------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| t2 | CREATE TABLE `t2` (
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`code` int(11) DEFAULT NULL,
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`COUNT(DISTINCT country)` bigint(21) NOT NULL,
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`MAX(id)` int(11)
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) ENGINE=InnoDB DEFAULT CHARSET=latin1 |
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+-------+----------------------------------------------------------------------------------------------------------------------------------------------------------------+
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Notice, MAX(id) was correctly created as INT(11) when doing CREATE..SELECT..FROM t1.
Now if I do the same with v1 instead of t1:
DROP TABLE IF EXISTS t2;
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CREATE TABLE t2 AS
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SELECT code, COUNT(DISTINCT country), MAX(id) FROM v1 GROUP BY code ORDER BY MAX(id);
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SHOW CREATE TABLE t2;
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it returns
+-------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| Table | Create Table |
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+-------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| t2 | CREATE TABLE `t2` (
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`code` int(11) DEFAULT NULL,
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`COUNT(DISTINCT country)` bigint(21) NOT NULL,
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`MAX(id)` bigint(11) DEFAULT NULL
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) ENGINE=InnoDB DEFAULT CHARSET=latin1 |
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+-------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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Notice, MAX(id) was erroneously created as BIGINT(11).
The problem happens because Item_sum::create_tmp_field() does not adjust the data type from length.
Attachments
Issue Links
- blocks
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MDEV-4912 Data type plugin API version 1
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- Closed
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