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kxiao pushed a commit to branch branch-2.0
in repository https://gitbox.apache.org/repos/asf/doris.git

commit 297ca925c8f61e56843bcd207b590a85d9504411
Author: morrySnow <[email protected]>
AuthorDate: Fri Sep 22 11:49:38 2023 +0800

    [fix](planner) ctas should not change any meta of column in source table 
(#24767)
    
    if previous PR #22770. we try to fix incorrect nullable in target table.
    However we changed nullable info of column in source table unexpectly
---
 .../org/apache/doris/analysis/CreateTableAsSelectStmt.java  |  6 ++++--
 regression-test/suites/ddl_p0/test_ctas.groovy              | 13 +++++++++----
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git 
a/fe/fe-core/src/main/java/org/apache/doris/analysis/CreateTableAsSelectStmt.java
 
b/fe/fe-core/src/main/java/org/apache/doris/analysis/CreateTableAsSelectStmt.java
index 0db7bb93c13..3019117942a 100644
--- 
a/fe/fe-core/src/main/java/org/apache/doris/analysis/CreateTableAsSelectStmt.java
+++ 
b/fe/fe-core/src/main/java/org/apache/doris/analysis/CreateTableAsSelectStmt.java
@@ -17,6 +17,7 @@
 
 package org.apache.doris.analysis;
 
+import org.apache.doris.catalog.Column;
 import org.apache.doris.catalog.ScalarType;
 import org.apache.doris.catalog.Type;
 import org.apache.doris.common.Config;
@@ -82,8 +83,9 @@ public class CreateTableAsSelectStmt extends DdlStmt {
         Preconditions.checkArgument(outputs.size() == 
queryStmt.getResultExprs().size());
         for (int i = 0; i < outputs.size(); ++i) {
             if (queryStmt.getResultExprs().get(i).getSrcSlotRef() != null) {
-                queryStmt.getResultExprs().get(i).getSrcSlotRef().getColumn()
-                        .setIsAllowNull(outputs.get(i).isNullable());
+                Column columnCopy =  new 
Column(queryStmt.getResultExprs().get(i).getSrcSlotRef().getColumn());
+                columnCopy.setIsAllowNull(outputs.get(i).isNullable());
+                
queryStmt.getResultExprs().get(i).getSrcSlotRef().getDesc().setColumn(columnCopy);
             }
             if (Config.enable_date_conversion) {
                 if (queryStmt.getResultExprs().get(i).getType() == Type.DATE) {
diff --git a/regression-test/suites/ddl_p0/test_ctas.groovy 
b/regression-test/suites/ddl_p0/test_ctas.groovy
index 1617e71c11e..db9385a841a 100644
--- a/regression-test/suites/ddl_p0/test_ctas.groovy
+++ b/regression-test/suites/ddl_p0/test_ctas.groovy
@@ -230,16 +230,21 @@ suite("test_ctas") {
         sql 'insert into a values(1, \'ww\'), (2, \'zs\');'
         sql 'insert into b values(1, 22);'
 
-        sql 'create table c properties("replication_num"="1") as select a.id, 
a.name, b.age from a left join b on a.id = b.id;'
+        sql 'set enable_nereids_planner=false'
+
+        sql 'create table c properties("replication_num"="1") as select b.id, 
a.name, b.age from a left join b on a.id = b.id;'
         
-        String desc = sql 'desc c'
-        assertTrue(desc.contains('Yes'))
+        String descC = sql 'desc c'
+        assertTrue(descC.contains('Yes'))
+        String descB = sql 'desc b'
+        assertTrue(descB.contains('No'))
+
         sql '''create table test_date_v2 
         properties (
                 "replication_num"="1"
         ) as select to_date('20250829');
         '''
-        desc = sql 'desc test_date_v2'
+        String desc = sql 'desc test_date_v2'
         assertTrue(desc.contains('Yes'))
     } finally {
         sql 'drop table a'


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