[branch-2.0](pick#26379) Add string-like column order by test

regression-test/data/query_p0/sort/sort.out

@@ -3146,3 +3146,63 @@ z
 3023-03-21T08:00 1023.1023 1023
 3024-03-21T08:00 1024.1024 1024
 
+-- !order_by_col_str --
+1 A
+2 A
+5 B
+6 B
+3 a
+4 a
+7 b
+8 b
+
+-- !order_by_col_str_null --
+2 \N
+4 \N
+6 \N
+8 \N
+1 A
+5 B
+3 a
+7 b
+
+-- !order_by_col_varchar --
+1 A
+2 A
+5 B
+6 B
+3 a
+4 a
+7 b
+8 b
+
+-- !order_by_col_varchar_null --
+2 \N
+4 \N
+6 \N
+8 \N
+1 A
+5 B
+3 a
+7 b
+
+-- !order_by_col_char --
+1 A
+2 A
+5 B
+6 B
+3 a
+4 a
+7 b
+8 b
+
+-- !order_by_col_char_null --
+2 \N
+4 \N
+6 \N
+8 \N
+1 A
+5 B
+3 a
+7 b
+

regression-test/suites/query_p0/sort/sort.groovy

@@ -155,4 +155,58 @@ suite("sort") {
  qt_order_by_float """ select /*SET_VAR(parallel_pipeline_task_num=1,parallel_fragment_exec_instance_num=1)*/ * from ${tblName} order by dc; """
  qt_order_by_int """ select /*SET_VAR(parallel_pipeline_task_num=1,parallel_fragment_exec_instance_num=1)*/ * from ${tblName} order by ic; """
  qt_order_by_uint """ select /*SET_VAR(parallel_pipeline_task_num=1,parallel_fragment_exec_instance_num=1)*/ * from ${tblName} order by time_period; """
+
+
+ // string order by test
+ // test purpose:
+ // 1. make sure order by string-like column will follow its ASCI value
+ // 2. make sure order by with null value works as expected
+ sql """ DROP TABLE IF EXISTS sort_string_orderby """
+ sql """ CREATE TABLE sort_string_orderby (
+ `row_id` INT NOT NULL,
+ `col_str` STRING NOT NULL,
+ `col_str_null` STRING NULL,
+ `col_varchar` VARCHAR(10) NOT NULL,
+ `col_varchar_null` VARCHAR(10) NULL,
+ `col_char` CHAR(10) NOT NULL,
+ `col_char_null` CHAR(10) NULL,
+ ) ENGINE=OLAP
+ DUPLICATE KEY(`row_id`)
+ DISTRIBUTED BY HASH(`row_id`) BUCKETS 1
+ PROPERTIES (
+ "replication_allocation" = "tag.location.default: 1",
+ "disable_auto_compaction" = "true"
+ );
+ """
+ sql """
+ INSERT INTO sort_string_orderby VALUES (1, 'A', 'A', 'A', 'A','A', 'A'),
+ (2, 'A', NULL, 'A', NULL, 'A', NULL),
+ (3, 'a', 'a', 'a', 'a','a', 'a'),
+ (4, 'a', NULL, 'a', NULL,'a', NULL),
+ (5, 'B', 'B', 'B', 'B','B', 'B'),
+ (6, 'B', NULL, 'B', NULL, 'B', NULL),
+ (7, 'b', 'b', 'b', 'b', 'b', 'b'),
+ (8, 'b', NULL, 'b', NULL,'b', NULL);
+ """
+ qt_order_by_col_str """
+ select row_id, col_str from sort_string_orderby order by col_str,row_id
+ """
+ qt_order_by_col_str_null """
+ select row_id, col_str_null from sort_string_orderby order by col_str_null,row_id;
+ """
+ qt_order_by_col_varchar """
+ select row_id, col_varchar from sort_string_orderby order by col_varchar,row_id
+ """
+ qt_order_by_col_varchar_null """
+ select row_id, col_varchar_null from sort_string_orderby order by col_varchar_null,row_id
+ """
+ qt_order_by_col_char """
+ select row_id, col_char from sort_string_orderby order by col_char,row_id
+ """
+ qt_order_by_col_char_null """
+ select row_id, col_char_null from sort_string_orderby order by col_char_null,row_id
+ """
+ sql """
+ drop table if exists sort_string_orderby;
+ """
 }