Table Value Constructors

MariaDB starting with 10.3.3

Table Value Constructors were introduced in MariaDB 10.3.3

Syntax

VALUES ( row_value[, row_value...]), (...)...

Description

In Unions, Views, and sub-queries, a Table Value Constructor (TVC) allows you to inject arbitrary values into the result-set. The given values must have the same number of columns as the result-set, otherwise it returns Error 1222.

Examples

Using TVC's with UNION operations:

CREATE TABLE test.t1 (val1 INT, val2 INT);
INSERT INTO test.t1 VALUES(5, 8), (3, 4), (1, 2);

SELECT * FROM test.t1
UNION
VALUES (70, 90), (100, 110);

+------+------+
| val1 | val2 |
+------+------+
|    5 |    8 | 
|    3 |    4 |
|    1 |    2 |
|   70 |   90 |
|  100 |  110 |
+------+------+

Using TVC's with a CREATE VIEW statement:

CREATE VIEW v1 AS VALUES (7, 9), (9, 10);

SELECT * FROM v1;
+---+----+
| 7 |  9 |
+---+----+
| 7 |  9 |
| 9 | 10 |
+---+----+

Using TVC with an ORDER BY clause:

SELECT * FROM test.t1
UNION
VALUES (10, 20), (30, 40), (50, 60), (70, 80)
ORDER BY val1 DESC;

Using TVC with LIMIT clause:

SELECT * FROM test.t1
UNION
VALUES (10, 20), (30, 40), (50, 60), (70, 80)
LIMIT 2 OFFSET 4;

+------+------+
| val1 | val2 |
+------+------+
|   30 |   40 | 
|   50 |   60 |
+------+------+

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