tkalkirill commented on code in PR #13562:
URL: https://github.com/apache/ignite/pull/13562#discussion_r3968029217
##########
modules/calcite/src/test/java/org/apache/ignite/internal/processors/query/calcite/integration/RecursiveCteIntegrationTest.java:
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@@ -31,6 +31,32 @@ public class RecursiveCteIntegrationTest extends
AbstractBasicIntegrationTest {
/** Number of invocations of a non-deterministic function. */
private static final AtomicInteger nonDeterministicCallCnt = new
AtomicInteger();
+ /** Explicit and inferred recursion must produce the same rows. */
+ @Test
+ public void testOptionalRecursiveKeyword() {
+ for (String keyword : new String[] {"", "RECURSIVE "}) {
+ assertQuery("WITH " + keyword + "seed(n) AS (SELECT 1), numbers(n)
AS (" +
+ "SELECT n FROM seed UNION ALL SELECT n + 1 FROM numbers WHERE
n < 3), " +
+ "result AS (SELECT * FROM numbers) SELECT * FROM result")
+ .returns(1)
+ .returns(2)
+ .returns(3)
+ .check();
+
+ assertQuery("SELECT * FROM (WITH " + keyword + "\"Numbers\"(n) AS
(" +
+ "SELECT 1 UNION ALL SELECT x.n + 1 FROM \"Numbers\" x WHERE
x.n < 3) " +
+ "SELECT * FROM \"Numbers\")")
+ .returns(1)
+ .returns(2)
+ .returns(3)
+ .check();
+
+ assertThrows("WITH " + keyword + "numbers(n) AS (" +
Review Comment:
This method is a wrapper that does the same thing yours does; it's better to
use it.
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