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Version: 2.5

if

Description​

If expr1 evaluates to TRUE, returns expr2. Otherwise, returns expr3.

Syntax​

if(expr1,expr2,expr3);

Parameters​

expr1: the condition. It must be a BOOLEAN value.

expr2: This value is returned if the condition is true. This expression must evaluate to any of the following data types: BOOLEAN, TINYINT, SMALLINT, INT, BIGINT, LARGEINT, FLOAT, DOUBLE, DATETIME, DATE, DECIMALV2, DECIMAL32, DECIMAL64, DECIMAL128, VARCHAR, BITMAP, PERCENTILE, HLL, TIME.

expr3: This value is returned if the condition is false. The data type is the same as expr2.

expr2 and expr3 must agree in data type.

Return value​

The return value has the same type as expr2.

Examples​

mysql> select if(false,1,2);
+-----------------+
| if(FALSE, 1, 2) |
+-----------------+
|               2 |
+-----------------+
1 row in set (0.00 sec)