SQL functions The following Flink SQL operators and functions are supported. Contact Decodable support if you don’t see something you need. Aggregate functions Arithmetic functions Collection functions Comparison functions Conditional functions Grouping functions Hash functions JSON functions Logical functions Stream conversion functions String functions Table-Valued Functions Temporal functions Type conversion functions Value construction functions XML functions Decodable functions The following SQL functions have been added to Flink SQL: GROK XPATHS APPROX_PERCENTILE IP_COUNTRY ARRAY_AGG ELEMENT_WISE_SUM