sunjincheng121 commented on a change in pull request #8087:
[FLINK-12029][table] Add column operations for TableApi
URL: https://github.com/apache/flink/pull/8087#discussion_r271232208
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File path:
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/api/scala/expressionDsl.scala
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@@ -184,6 +190,11 @@ trait ImplicitExpressionOperations {
*/
def % (other: Expression): Expression = mod(other)
+ /**
+ * Column operation which indicates the range from left to right inclusive.
+ */
+ def to (other: Expression): Expression = call(COLUMNS_RANGE, expr, other)
Review comment:
Indicates the range from left to right, i.e. [left, right], which can be
used in columns selection, e.g.: columns(1 to 3). In future `to` can be using
other cases. what do you think?
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