Github user arina-ielchiieva commented on a diff in the pull request:
https://github.com/apache/drill/pull/685#discussion_r96463387
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/sql/DrillSqlOperator.java
---
@@ -147,6 +166,14 @@ public DrillSqlOperatorBuilder
setDeterministic(boolean isDeterministic) {
return this;
}
+ public DrillSqlOperatorBuilder setNiladic(boolean isNiladic) {
+ /*
+ * Set Operand type-checking strategy for an operator which takes no
operands
+ */
--- End diff --
Also let's add note here that making function niladic won't allow to select
column with function name without table alias. Please also add example:
When querying table t with column session_id:
select session_id from table -> will return generated session_id
select t1.session_id from table t1 -> will return session_id column value
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