- 类别:
半结构化和结构化数据函数 (类型谓词)
IS_INTEGER¶
如果其 VARIANT 实参包含整数值,则返回 TRUE。
语法¶
IS_INTEGER( <variant_expr> )
实参¶
variant_expr
VARIANT 类型值计算的表达式。
示例¶
这显示了该函数的使用方法:
创建表和数据:
CREATE TABLE multiple_types ( array1 VARIANT, array2 VARIANT, boolean1 VARIANT, char1 VARIANT, varchar1 VARIANT, decimal1 VARIANT, double1 VARIANT, integer1 VARIANT, object1 VARIANT ); INSERT INTO multiple_types (array1, array2, boolean1, char1, varchar1, decimal1, double1, integer1, object1) SELECT TO_VARIANT(TO_ARRAY('Example')), TO_VARIANT(ARRAY_CONSTRUCT('Array-like', '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"}'))) ;现在运行查询:
SELECT IS_INTEGER(integer1), IS_INTEGER(decimal1), IS_INTEGER(double1) FROM multiple_types; +----------------------+----------------------+---------------------+ | IS_INTEGER(INTEGER1) | IS_INTEGER(DECIMAL1) | IS_INTEGER(DOUBLE1) | |----------------------+----------------------+---------------------| | True | False | False | +----------------------+----------------------+---------------------+