[fix](case)Fix multiple case tables with the same name causing case f…

…ailure (#42203) (#43043)

pick from master #42203

regression-test/suites/nereids_p0/union/test_union.groovy

@@ -18,6 +18,8 @@
 suite("test_union") {
     sql "SET enable_nereids_planner=true"
     sql "SET enable_fallback_to_original_planner=false"
+    String suiteName = "nereids_union_test_union"
+    String viewName = "${suiteName}_view"
     def db = "nereids_test_query_db"
     sql "use ${db}"
 
@@ -174,14 +176,14 @@ suite("test_union") {
     // test_union_bug
     // PALO-3617
     qt_union36 """select * from (select 1 as a, 2 as b union select 3, 3) c where a = 1"""
-    sql """drop view if exists nullable"""
-    sql """CREATE VIEW `nullable` AS SELECT `a`.`k1` AS `n1`, `b`.`k2` AS `n2` 
+    sql """drop view if exists ${viewName}"""
+    sql """CREATE VIEW `${viewName}` AS SELECT `a`.`k1` AS `n1`, `b`.`k2` AS `n2`
            FROM `default_cluster:${db}`.`baseall` a LEFT OUTER JOIN 
            `default_cluster:${db}`.`bigtable` b ON `a`.`k1` = `b`.`k1` + 10
            WHERE `b`.`k2` IS NULL"""
-    order_qt_union37 """select n1 from nullable union all select n2 from nullable"""
-    qt_union38 """(select n1 from nullable) union all (select n2 from nullable order by n1) order by n1"""
-    qt_union39 """(select n1 from nullable) union all (select n2 from nullable) order by n1"""
+    order_qt_union37 """select n1 from ${viewName} union all select n2 from ${viewName}"""
+    qt_union38 """(select n1 from ${viewName}) union all (select n2 from ${viewName} order by n1) order by n1"""
+    qt_union39 """(select n1 from ${viewName}) union all (select n2 from ${viewName}) order by n1"""
 
 
     // test_union_different_column

regression-test/suites/query_p0/union/test_union.groovy

@@ -16,6 +16,8 @@
 // under the License.
 
 suite("test_union") {
+    String suiteName = "query_union_test_union"
+    String viewName = "${suiteName}_view"
     def db = "test_query_db"
     sql "use ${db}"
 
@@ -172,14 +174,14 @@ suite("test_union") {
     // test_union_bug
     // PALO-3617
     qt_union36 """select * from (select 1 as a, 2 as b union select 3, 3) c where a = 1"""
-    sql """drop view if exists nullable"""
-    sql """CREATE VIEW `nullable` AS SELECT `a`.`k1` AS `n1`, `b`.`k2` AS `n2` 
+    sql """drop view if exists ${viewName}"""
+    sql """CREATE VIEW `${viewName}` AS SELECT `a`.`k1` AS `n1`, `b`.`k2` AS `n2`
            FROM `default_cluster:${db}`.`baseall` a LEFT OUTER JOIN 
            `default_cluster:${db}`.`bigtable` b ON `a`.`k1` = `b`.`k1` + 10
            WHERE `b`.`k2` IS NULL"""
-    order_qt_union37 """select n1 from nullable union all select n2 from nullable"""
-    qt_union38 """(select n1 from nullable) union all (select n2 from nullable order by n1) order by n1"""
-    qt_union39 """(select n1 from nullable) union all (select n2 from nullable) order by n1"""
+    order_qt_union37 """select n1 from ${viewName} union all select n2 from ${viewName}"""
+    qt_union38 """(select n1 from ${viewName}) union all (select n2 from ${viewName} order by n1) order by n1"""
+    qt_union39 """(select n1 from ${viewName}) union all (select n2 from ${viewName}) order by n1"""
 
 
     // test_union_different_column