liyafan82 commented on a change in pull request #2330:
URL: https://github.com/apache/calcite/pull/2330#discussion_r561508574
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File path: core/src/test/java/org/apache/calcite/rex/RexProgramTest.java
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@@ -2857,6 +2857,108 @@ private void checkSarg(String message, Sarg sarg,
is(2), is("Sarg[[3..8], [10..20]]"));
}
+ /** Tests {@link Sarg#numDistinctVals(RelDataType)}. */
+ @Test void testSargNdv() {
+ RelDataType nonNullableInt =
typeFactory.createSqlType(SqlTypeName.INTEGER);
+ RelDataType nullableInt =
typeFactory.createTypeWithNullability(nonNullableInt, true);
+
+ RelDataType nonNullableFloat =
typeFactory.createSqlType(SqlTypeName.FLOAT);
+ RelDataType nullableFloat =
typeFactory.createTypeWithNullability(nonNullableFloat, true);
+
+ // point: 10 (non-nullable)
+ Sarg sarg = Sarg.of(false,
+ ImmutableRangeSet.of(Range.closed(10, 10)));
+ assertThat(sarg.numDistinctVals(nonNullableInt), is(1.0));
Review comment:
Thank you for the good suggestion.
I have revised the code accordingly.
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