What SQL functions are missing from Kylin? I ask because there is a JIRA case in Calcite to add a collection of Oracle-compatible functions, such as DECODE and NVL, to Calcite. Since Kylin embeds Calcite, it will get those functions next time Kylin upgrades Calcite.
If you want some more built-in functions in Calcite, submit a patch that implements one or more of the functions mentioned in https://issues.apache.org/jira/browse/CALCITE-1066 <https://issues.apache.org/jira/browse/CALCITE-1066>. Or indeed any of your other favorite functions from Oracle, MySQL or Postgres. Now is a good time because Calcite will be making a release in a couple of weeks. Julian
