Merge pull request ClickHouse#100818 from groeneai/fix/03926-03927-join-swap-explain-flaky

Fix flaky tests 03926_semi_join_swap_tables and 03927_anti_join_swap_tables

Author: pufit

tests/queries/0_stateless/03926_semi_join_swap_tables.reference

@@ -1,12 +1,12 @@
-  Type: RIGHT
-  Strictness: SEMI
-    Type: LEFT
-    Strictness: SEMI
-    Type: LEFT
-    Strictness: SEMI
-    Type: LEFT
-    Strictness: SEMI
+Type: RIGHT
+Strictness: SEMI
+Type: LEFT
+Strictness: SEMI
+Type: LEFT
+Strictness: SEMI
+Type: LEFT
+Strictness: SEMI
 3
-  Type: LEFT
-  Strictness: SEMI
+Type: LEFT
+Strictness: SEMI
 3

tests/queries/0_stateless/03926_semi_join_swap_tables.sql

@@ -16,7 +16,7 @@ SET enable_analyzer = 1, query_plan_join_swap_table = 'auto';
 SET join_algorithm='hash';
 
 -- swap LEFT SEMI join to RIGHT SEMI join
-SELECT *
+SELECT trimLeft(explain)
 FROM (
     EXPLAIN actions=1
     SELECT *
@@ -28,7 +28,7 @@ WHERE (explain LIKE '% Type:%') OR (explain LIKE '% Strictness:%')
 SETTINGS enable_join_runtime_filters = 1; -- affects hash join plan depth
 
 -- no swapping for PARTIAL_MERGE join
-SELECT *
+SELECT trimLeft(explain)
 FROM (
     EXPLAIN actions=1
     SELECT *
@@ -40,7 +40,7 @@ FROM (
 WHERE (explain LIKE '% Type:%') OR (explain LIKE '% Strictness:%');
 
 -- no swapping for PREFER_PARTIAL_MERGE join
-SELECT *
+SELECT trimLeft(explain)
 FROM (
     EXPLAIN actions=1
     SELECT *
@@ -52,11 +52,11 @@ FROM (
 WHERE (explain LIKE '% Type:%') OR (explain LIKE '% Strictness:%');
 
 -- no swapping for AUTO join
-SELECT *
+SELECT trimLeft(explain)
 FROM (
     EXPLAIN actions=1
     SELECT *
-    FROM lhs 
+    FROM lhs
     LEFT SEMI JOIN rhs
     ON lhs.a = rhs.a
     SETTINGS join_algorithm='auto'
@@ -77,7 +77,7 @@ FROM system.query_log
 WHERE log_comment = '03926_left_semi_join_swap_tables' AND current_database = currentDatabase() AND type = 'QueryFinish' AND event_date >= yesterday() AND event_time >= NOW() - INTERVAL '10 MINUTE';
 
 -- swap RIGHT SEMI join to LEFT SEMI join
-SELECT *
+SELECT trimLeft(explain)
 FROM (
     EXPLAIN actions=1
     SELECT *