Github user nagarajanchinnasamy commented on the issue:
https://github.com/apache/drill/pull/685
Success :) I could invoke SESSION_ID without parenthesis. Following did the
trick:
1. In DrillSqlOperator, overriding getSyntax method to return
SqlSyntax.FUNCTION_ID
2. In DrillOperatorTable, adding operator when SqlSyntax is (FUNCTION ||
FUNCTION_ID)
Will submit a commit shortly.
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