pengzhiwei2018 commented on a change in pull request #1138: [CALCITE-1581] UDTF
like in hive
URL: https://github.com/apache/calcite/pull/1138#discussion_r314567970
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File path: core/src/main/java/org/apache/calcite/sql2rel/SqlToRelConverter.java
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@@ -3948,6 +3950,30 @@ private void convertSelectList(
}
}
+ /**
+ * Convert the table function in select to Join or TableFunctionScan.
+ * @param bb Blackboard
+ * @param select SqlSelect
+ * */
+ private void convertTableFunctionInSelect(Blackboard bb, SqlSelect select) {
+ SqlBasicCall tableFunction = validator.getTableFunctionInSelect(select);
+ // rewrite the table function if select list contain one
+ if (tableFunction != null) {
Review comment:
If select cotains a table function, It will be converted to a join.
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