Categories:
Semi-structured Data Functions (Type Predicates)

IS_DOUBLE , IS_REAL

Returns TRUE if its VARIANT argument contains a floating-point value, fixed-point decimal, or integer.

These functions are synonymous.

See also:
IS_<object_type> , IS_DECIMAL , IS_INTEGER

Syntax

IS_DOUBLE( <variant_expr> )

IS_REAL( <variant_expr> )

Arguments

variant_expr
An expression that evaluates to a value of type VARIANT.

Examples

This shows how to use the function:

Create a table and data:

CREATE TABLE multiple_types (
    array1 VARIANT,
    boolean1 VARIANT,
    char1 VARIANT,
    varchar1 VARIANT,
    decimal1 VARIANT,
    double1 VARIANT,
    integer1 VARIANT,
    object1 VARIANT
    );
INSERT INTO multiple_types 
     (array1, boolean1, char1, varchar1, 
      decimal1, double1, integer1, object1)
   SELECT 
     TO_VARIANT(TO_ARRAY('Example')), 
     TO_VARIANT(TRUE), 
     TO_VARIANT('X'), 
     TO_VARIANT('I am a real character'), 
     TO_VARIANT(1.23::DECIMAL(6, 3)),
     TO_VARIANT(3.21::DOUBLE),
     TO_VARIANT(15),
     TO_VARIANT(TO_OBJECT(PARSE_JSON('{"Tree": "Pine"}')))
     ;

Now run the query:

SELECT IS_DOUBLE(double1), IS_DOUBLE(decimal1), IS_DOUBLE(integer1), IS_DOUBLE(boolean1) FROM multiple_types;
+--------------------+---------------------+---------------------+---------------------+
| IS_DOUBLE(DOUBLE1) | IS_DOUBLE(DECIMAL1) | IS_DOUBLE(INTEGER1) | IS_DOUBLE(BOOLEAN1) |
|--------------------+---------------------+---------------------+---------------------|
| True               | True                | True                | False               |
+--------------------+---------------------+---------------------+---------------------+