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Posted to dev@flink.apache.org by "Timo Walther (JIRA)" <ji...@apache.org> on 2018/03/15 11:42:00 UTC
[jira] [Created] (FLINK-8953) Resolve unresolved field references
in FieldComputer expressions
Timo Walther created FLINK-8953:
-----------------------------------
Summary: Resolve unresolved field references in FieldComputer expressions
Key: FLINK-8953
URL: https://issues.apache.org/jira/browse/FLINK-8953
Project: Flink
Issue Type: Improvement
Components: Table API & SQL
Reporter: Timo Walther
When implementing the {{FieldComputer.getExpression}} method, it is not possible to use API classes but only internal expression case classes.
It would be great to also define timestamp extractors like:
{code}
def getExpression(fieldAccesses: Array[ResolvedFieldReference]): Expression = {
// 'x.cast(Types.LONG)
// ExpressionParser.parseExpression("x.cast(LONG)")
}
{code}
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