Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/2653#discussion_r90442225
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/expressions/ExpressionParser.scala
---
@@ -451,6 +452,28 @@ object ExpressionParser extends JavaTokenParsers with
PackratParsers {
}
}
+ lazy val tableFunctionCall: PackratParser[LogicalNode] =
+ functionIdent ~ "(" ~ repsep(expression, ",") ~ ")" ^^ {
+ case name ~ _ ~ args ~ _ =>
UnresolvedTableFunctionCall(name.toUpperCase, args)
--- End diff --
I think it would not hurt if we support `split(c) as (f1, f2)` for all
expressions. This could also help in cases where we expand the projection like
`pojo.flatten() as (f1, f2)`. I don't like the idea of a logical parser. It is
already confusing enough for the user that we have Java API expression strings
and SQL strings, we don't need another string syntax.
@fhueske what do you think?
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