add more tests for lead/lag (#5792)

ref #5579
pingcap · Sep 7, 2022 · 51d54e1 · 51d54e1
1 parent c9ce318
commit 51d54e1
Showing 1 changed file with 45 additions and 0 deletions.
diff --git a/tests/fullstack-test/expr/lead_lag.test b/tests/fullstack-test/expr/lead_lag.test
@@ -233,6 +233,51 @@ mysql> set @@tidb_isolation_read_engines='tiflash'; set tidb_enforce_mpp=1; sele
 | NULL                                                 |
 +------------------------------------------------------+
 
+## test offset
+mysql> set @@tidb_isolation_read_engines='tiflash'; set tidb_enforce_mpp=1; select 'a', lead(value_str, -1) over w from test.test_str window w as(PARTITION BY part ORDER BY orde) order by orde;
+{#REGEXP}.*You have an error in your SQL syntax.*
+mysql> set @@tidb_isolation_read_engines='tiflash'; set tidb_enforce_mpp=1; select 'a', lead(value_str, 0) over w from test.test_str window w as(PARTITION BY part ORDER BY orde) order by orde;
++---+---------------------------+
+| a | lead(value_str, 0) over w |
++---+---------------------------+
+| a | 1                         |
+| a |                           |
+| a | 3                         |
+| a | 4                         |
+| a | 5                         |
+| a | NULL                      |
+| a | 7                         |
+| a | 8                         |
++---+---------------------------+
+mysql> set @@tidb_isolation_read_engines='tiflash'; set tidb_enforce_mpp=1; select 'a', lead(value_str, 1) over w from test.test_str window w as(PARTITION BY part ORDER BY orde) order by orde;
++---+---------------------------+
+| a | lead(value_str, 1) over w |
++---+---------------------------+
+| a |                           |
+| a | 3                         |
+| a | 4                         |
+| a | NULL                      |
+| a | NULL                      |
+| a | 7                         |
+| a | 8                         |
+| a | NULL                      |
++---+---------------------------+
+mysql> set @@tidb_isolation_read_engines='tiflash'; set tidb_enforce_mpp=1; select 'a', orde, part, value_str, lead(value_str, 18446744073709551615) over w from test.test_str window w as(PARTITION BY part ORDER BY orde) order by orde;
++---+------+------+-----------+----------------------------------------------+
+| a | orde | part | value_str | lead(value_str, 18446744073709551615) over w |
++---+------+------+-----------+----------------------------------------------+
+| a |    1 |    1 | 1         | NULL                                         |
+| a |    2 |    1 |           | 1                                            |
+| a |    3 |    1 | 3         |                                              |
+| a |    4 |    1 | 4         | 3                                            |
+| a |    5 |    2 | 5         | NULL                                         |
+| a |    6 |    2 | NULL      | 5                                            |
+| a |    7 |    2 | 7         | NULL                                         |
+| a |    8 |    2 | 8         | 7                                            |
++---+------+------+-----------+----------------------------------------------+
+mysql> set @@tidb_isolation_read_engines='tiflash'; set tidb_enforce_mpp=1; select 'a', lead(value_str, 18446744073709551616) over w from test.test_str window w as(PARTITION BY part ORDER BY orde) order by orde;
+{#REGEXP}.*Incorrect arguments.*
+
 mysql> drop table if exists test.test_str
 mysql> drop table if exists test.test_int
 mysql> drop table if exists test.test_float