jduo commented on code in PR #3720:
URL: https://github.com/apache/calcite/pull/3720#discussion_r1517644119
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testkit/src/main/java/org/apache/calcite/test/SqlOperatorTest.java:
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@@ -6307,6 +6307,22 @@ void checkRegexpExtract(SqlOperatorFixture f0,
FunctionAlias functionAlias) {
}
}
+ /** Test case for
+ * <a
href="https://issues.apache.org/jira/browse/CALCITE-6314";>[CALCITE-6314]
+ * Support PostgreSQL RANDOM</a>. */
+ @Test void testRandomFunc() {
+ final SqlOperatorFixture f = fixture();
+ f.setFor(SqlLibraryOperators.RANDOM, VmName.EXPAND);
+ f.checkFails("^random^", "Column 'RANDOM' not found in any table", false);
+ Consumer<SqlOperatorFixture> test = fixture -> {
+ for (int i = 0; i < 100; i++) {
+ // Result must always be between 0 and 1, inclusive.
+ fixture.checkScalarApprox("random()", "DOUBLE NOT NULL", isWithin(0.5,
0.5));
+ }
+ };
+ f.forEachLibrary(list(SqlLibrary.POSTGRESQL), test);
Review Comment:
Looks like Redshift is the only other DBMS supporting this. Snowflake has a
RANDOM function too, but it returns a random integer instead of a double in the
range [0, 1]
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