danny0405 commented on a change in pull request #1282: [CALCITE-3151] RexCall's
Monotonicity is not considered in determinin…
URL: https://github.com/apache/calcite/pull/1282#discussion_r298445538
##########
File path: core/src/test/java/org/apache/calcite/test/RelOptRulesTest.java
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@@ -5580,6 +5586,49 @@ private Sql checkSubQuery(String sql) {
.withPre(preProgram).with(program).check();
}
+ @Test public void testMonotonicityUDF() throws Exception {
+ final SqlFunction monotonicityFun =
+ new SqlFunction("MONOFUN", SqlKind.OTHER_FUNCTION, ReturnTypes.BIGINT,
null,
+ OperandTypes.NILADIC, SqlFunctionCategory.USER_DEFINED_FUNCTION) {
+ @Override public boolean isDeterministic() {
+ return false;
+ }
+
+ @Override public SqlMonotonicity getMonotonicity(SqlOperatorBinding
call) {
+ return SqlMonotonicity.INCREASING;
+ }
+ };
+
+ // Build a tree equivalent to the SQL
+ // SELECT sal, MONOFUN() AS n FROM emp
Review comment:
nit: the redundant whitespace
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