[MDEV-12798] Item_param does not preserve exact field type in EXECUTE IMMEDIATE 'CREATE TABLE AS SELECT ?' USING POINT(1,1) - Jira

This script:

DROP TABLE IF EXISTS t1;

EXECUTE IMMEDIATE 'CREATE TABLE t1 AS SELECT ?' USING POINT(1,1);

SHOW CREATE TABLE t1;

creates a column of a wrong type:

+-------+-----------------------------------------------------------------------------------------+

| Table | Create Table                                                                            |

+-------+-----------------------------------------------------------------------------------------+

| t1    | CREATE TABLE `t1` (

  `?` varbinary(25) NOT NULL

) ENGINE=InnoDB DEFAULT CHARSET=latin1 |

+-------+-----------------------------------------------------------------------------------------+

The expected type should be POINT.

The same problem is repeatable in:

DROP TABLE IF EXISTS t1;

PREPARE stmt FROM 'CREATE OR REPLACE TABLE t1 AS SELECT ?';

EXECUTE stmt USING POINT(1,1);

SHOW CREATE TABLE t1;

blocks

MDEV-4912 Data type plugin API version 1

relates to

MDEV-10866 Extend PREPARE and EXECUTE IMMEDIATE to understand expressions

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