Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/2870#discussion_r104377221
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/table.scala
---
@@ -150,7 +150,35 @@ class Table(
* }}}
*/
def filter(predicate: Expression): Table = {
- new Table(tableEnv, Filter(predicate, logicalPlan).validate(tableEnv))
+
+ predicate match {
--- End diff --
As far as I know `IN` is a general expression, so it can be used where ever
expressions are allowed. I quickly checked it in MySQL and `SELECT field1 IN (
22, 23 ) FROM Table1` is not a problem.
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