Add tests for simple one-column index sorting

h2/src/test/org/h2/test/scripts/indexes.sql

@@ -3,6 +3,269 @@
 -- Initial Developer: H2 Group
 --
 
+-- Test all possible order modes
+
+CREATE TABLE TEST(A INT);
+> ok
+
+INSERT INTO TEST VALUES (NULL), (0), (1);
+> update count: 3
+
+-- default
+
+SELECT A FROM TEST ORDER BY A;
+> A
+> ----
+> null
+> 0
+> 1
+> rows (ordered): 3
+
+CREATE INDEX A_IDX ON TEST(A);
+
+SELECT A FROM TEST ORDER BY A;
+> A
+> ----
+> null
+> 0
+> 1
+> rows (ordered): 3
+
+EXPLAIN SELECT A FROM TEST ORDER BY A;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX */ ORDER BY 1 /* index sorted */
+
+DROP INDEX A_IDX;
+> ok
+
+-- ASC
+
+SELECT A FROM TEST ORDER BY A ASC;
+> A
+> ----
+> null
+> 0
+> 1
+> rows (ordered): 3
+
+CREATE INDEX A_IDX ON TEST(A ASC);
+
+SELECT A FROM TEST ORDER BY A ASC;
+> A
+> ----
+> null
+> 0
+> 1
+> rows (ordered): 3
+
+EXPLAIN SELECT A FROM TEST ORDER BY A ASC;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX */ ORDER BY 1 /* index sorted */
+
+DROP INDEX A_IDX;
+> ok
+
+-- ASC NULLS FIRST
+
+SELECT A FROM TEST ORDER BY A ASC NULLS FIRST;
+> A
+> ----
+> null
+> 0
+> 1
+> rows (ordered): 3
+
+CREATE INDEX A_IDX ON TEST(A ASC NULLS FIRST);
+
+SELECT A FROM TEST ORDER BY A ASC NULLS FIRST;
+> A
+> ----
+> null
+> 0
+> 1
+> rows (ordered): 3
+
+EXPLAIN SELECT A FROM TEST ORDER BY A ASC NULLS FIRST;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX */ ORDER BY 1 NULLS FIRST /* index sorted */
+
+DROP INDEX A_IDX;
+> ok
+
+-- ASC NULLS LAST
+
+SELECT A FROM TEST ORDER BY A ASC NULLS LAST;
+> A
+> ----
+> 0
+> 1
+> null
+> rows (ordered): 3
+
+CREATE INDEX A_IDX ON TEST(A ASC NULLS LAST);
+
+SELECT A FROM TEST ORDER BY A ASC NULLS LAST;
+> A
+> ----
+> 0
+> 1
+> null
+> rows (ordered): 3
+
+EXPLAIN SELECT A FROM TEST ORDER BY A ASC NULLS LAST;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX */ ORDER BY 1 NULLS LAST /* index sorted */
+
+DROP INDEX A_IDX;
+> ok
+
+-- DESC
+
+SELECT A FROM TEST ORDER BY A DESC;
+> A
+> ----
+> 1
+> 0
+> null
+> rows (ordered): 3
+
+CREATE INDEX A_IDX ON TEST(A DESC);
+
+SELECT A FROM TEST ORDER BY A DESC;
+> A
+> ----
+> 1
+> 0
+> null
+> rows (ordered): 3
+
+EXPLAIN SELECT A FROM TEST ORDER BY A DESC;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX */ ORDER BY 1 DESC /* index sorted */
+
+DROP INDEX A_IDX;
+> ok
+
+-- DESC NULLS FIRST
+
+SELECT A FROM TEST ORDER BY A DESC NULLS FIRST;
+> A
+> ----
+> null
+> 1
+> 0
+> rows (ordered): 3
+
+CREATE INDEX A_IDX ON TEST(A DESC NULLS FIRST);
+
+SELECT A FROM TEST ORDER BY A DESC NULLS FIRST;
+> A
+> ----
+> null
+> 1
+> 0
+> rows (ordered): 3
+
+EXPLAIN SELECT A FROM TEST ORDER BY A DESC NULLS FIRST;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX */ ORDER BY 1 DESC NULLS FIRST /* index sorted */
+
+DROP INDEX A_IDX;
+> ok
+
+-- DESC NULLS LAST
+
+SELECT A FROM TEST ORDER BY A DESC NULLS LAST;
+> A
+> ----
+> 1
+> 0
+> null
+> rows (ordered): 3
+
+CREATE INDEX A_IDX ON TEST(A DESC NULLS LAST);
+
+SELECT A FROM TEST ORDER BY A DESC NULLS LAST;
+> A
+> ----
+> 1
+> 0
+> null
+> rows (ordered): 3
+
+EXPLAIN SELECT A FROM TEST ORDER BY A DESC NULLS LAST;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX */ ORDER BY 1 DESC NULLS LAST /* index sorted */
+
+DROP INDEX A_IDX;
+> ok
+
+-- Index selection
+
+CREATE INDEX A_IDX_ASC ON TEST(A ASC);
+> ok
+
+CREATE INDEX A_IDX_ASC_NL ON TEST(A ASC NULLS LAST);
+> ok
+
+CREATE INDEX A_IDX_DESC ON TEST(A DESC);
+> ok
+
+CREATE INDEX A_IDX_DESC_NF ON TEST(A DESC NULLS FIRST);
+> ok
+
+EXPLAIN SELECT A FROM TEST ORDER BY A;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX_ASC */ ORDER BY 1 /* index sorted */
+
+EXPLAIN SELECT A FROM TEST ORDER BY A ASC;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX_ASC */ ORDER BY 1 /* index sorted */
+
+EXPLAIN SELECT A FROM TEST ORDER BY A NULLS FIRST;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX_ASC */ ORDER BY 1 NULLS FIRST /* index sorted */
+
+EXPLAIN SELECT A FROM TEST ORDER BY A NULLS LAST;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX_ASC_NL */ ORDER BY 1 NULLS LAST /* index sorted */
+
+EXPLAIN SELECT A FROM TEST ORDER BY A DESC;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX_DESC */ ORDER BY 1 DESC /* index sorted */
+
+EXPLAIN SELECT A FROM TEST ORDER BY A DESC NULLS FIRST;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX_DESC_NF */ ORDER BY 1 DESC NULLS FIRST /* index sorted */
+
+EXPLAIN SELECT A FROM TEST ORDER BY A DESC NULLS LAST;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX_DESC */ ORDER BY 1 DESC NULLS LAST /* index sorted */
+
+DROP INDEX A_IDX_ASC;
+> ok
+
+DROP INDEX A_IDX_DESC;
+> ok
+
+CREATE INDEX A_IDX_ASC_NF ON TEST(A ASC NULLS FIRST);
+> ok
+
+CREATE INDEX A_IDX_DESC_NL ON TEST(A DESC NULLS LAST);
+> ok
+
+EXPLAIN SELECT A FROM TEST ORDER BY A;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX_ASC_NF */ ORDER BY 1 /* index sorted */
+
+EXPLAIN SELECT A FROM TEST ORDER BY A ASC;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX_ASC_NF */ ORDER BY 1 /* index sorted */
+
+EXPLAIN SELECT A FROM TEST ORDER BY A NULLS FIRST;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX_ASC_NF */ ORDER BY 1 NULLS FIRST /* index sorted */
+
+EXPLAIN SELECT A FROM TEST ORDER BY A NULLS LAST;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX_ASC_NL */ ORDER BY 1 NULLS LAST /* index sorted */
+
+EXPLAIN SELECT A FROM TEST ORDER BY A DESC;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX_DESC_NL */ ORDER BY 1 DESC /* index sorted */
+
+EXPLAIN SELECT A FROM TEST ORDER BY A DESC NULLS FIRST;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX_DESC_NF */ ORDER BY 1 DESC NULLS FIRST /* index sorted */
+
+EXPLAIN SELECT A FROM TEST ORDER BY A DESC NULLS LAST;
+>> SELECT A FROM PUBLIC.TEST /* PUBLIC.A_IDX_DESC_NL */ ORDER BY 1 DESC NULLS LAST /* index sorted */
+
+DROP TABLE TEST;
+> ok
+
+-- Other tests
+
 create table test(a int, b int);
 > ok