amaliujia commented on a change in pull request #2447:
URL: https://github.com/apache/calcite/pull/2447#discussion_r668968983
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File path:
core/src/main/java/org/apache/calcite/sql/fun/SqlStdOperatorTable.java
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@@ -952,6 +952,16 @@
*/
public static final SqlAggFunction COUNT = new SqlCountAggFunction("COUNT");
+ /**
+ * <code>MODE</code> aggregate function.
+ */
+ public static final SqlAggFunction MODE =
+ SqlBasicAggFunction
+ .create("MODE", SqlKind.MODE,
+ ReturnTypes.ARG0_NULLABLE_IF_EMPTY, OperandTypes.ANY_NOT_NULL)
Review comment:
In the JIRA discussion, I see that MODE allows NULL but if NULL is the
most common value, return the second most common value instead. Why you choose
to does not allow now in type?
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