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The following commit(s) were added to refs/heads/master by this push:
     new 20d2d4b764 [core] Add validation for default value (#6164)
20d2d4b764 is described below

commit 20d2d4b76452ef64b1bd1b122d3bd5abe34d2600
Author: Zouxxyy <[email protected]>
AuthorDate: Thu Aug 28 12:04:52 2025 +0800

    [core] Add validation for default value (#6164)
---
 .../org/apache/paimon/casting/DefaultValueRow.java | 19 ++-----
 .../org/apache/paimon/utils/DefaultValueUtils.java | 61 ++++++++++++++++++++++
 .../org/apache/paimon/catalog/CatalogUtils.java    |  5 ++
 .../org/apache/paimon/schema/SchemaManager.java    | 17 +++---
 .../org/apache/paimon/flink/BranchSqlITCase.java   |  8 +++
 .../apache/paimon/spark/sql/DefaultValueTest.scala | 52 ++++++++++++++++++
 paimon-spark/pom.xml                               |  4 ++
 7 files changed, 143 insertions(+), 23 deletions(-)

diff --git 
a/paimon-common/src/main/java/org/apache/paimon/casting/DefaultValueRow.java 
b/paimon-common/src/main/java/org/apache/paimon/casting/DefaultValueRow.java
index 4e62bf47ed..18bfc96390 100644
--- a/paimon-common/src/main/java/org/apache/paimon/casting/DefaultValueRow.java
+++ b/paimon-common/src/main/java/org/apache/paimon/casting/DefaultValueRow.java
@@ -29,12 +29,13 @@ import org.apache.paimon.data.variant.Variant;
 import org.apache.paimon.types.DataField;
 import org.apache.paimon.types.RowKind;
 import org.apache.paimon.types.RowType;
-import org.apache.paimon.types.VarCharType;
 
 import javax.annotation.Nullable;
 
 import java.util.List;
 
+import static org.apache.paimon.utils.DefaultValueUtils.convertDefaultValue;
+
 /**
  * An implementation of {@link InternalRow} which provides a default value for 
the underlying {@link
  * InternalRow}.
@@ -215,21 +216,7 @@ public class DefaultValueRow implements InternalRow {
             }
 
             containsDefaultValue = true;
-            @SuppressWarnings("unchecked")
-            CastExecutor<Object, Object> resolve =
-                    (CastExecutor<Object, Object>)
-                            CastExecutors.resolve(VarCharType.STRING_TYPE, 
dataField.type());
-
-            if (resolve == null) {
-                throw new RuntimeException(
-                        "Default value do not support the type of " + 
dataField.type());
-            }
-
-            if (defaultValueStr.startsWith("'") && 
defaultValueStr.endsWith("'")) {
-                defaultValueStr = defaultValueStr.substring(1, 
defaultValueStr.length() - 1);
-            }
-
-            Object defaultValue = 
resolve.cast(BinaryString.fromString(defaultValueStr));
+            Object defaultValue = convertDefaultValue(dataField.type(), 
defaultValueStr);
             row.setField(i, defaultValue);
         }
 
diff --git 
a/paimon-common/src/main/java/org/apache/paimon/utils/DefaultValueUtils.java 
b/paimon-common/src/main/java/org/apache/paimon/utils/DefaultValueUtils.java
new file mode 100644
index 0000000000..b82f5f77e7
--- /dev/null
+++ b/paimon-common/src/main/java/org/apache/paimon/utils/DefaultValueUtils.java
@@ -0,0 +1,61 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.paimon.utils;
+
+import org.apache.paimon.casting.CastExecutor;
+import org.apache.paimon.casting.CastExecutors;
+import org.apache.paimon.data.BinaryString;
+import org.apache.paimon.types.DataType;
+import org.apache.paimon.types.VarCharType;
+
+import javax.annotation.Nullable;
+
+/** Utils for default value. */
+public class DefaultValueUtils {
+
+    public static Object convertDefaultValue(DataType dataType, String 
defaultValueStr) {
+        @SuppressWarnings("unchecked")
+        CastExecutor<Object, Object> resolve =
+                (CastExecutor<Object, Object>)
+                        CastExecutors.resolve(VarCharType.STRING_TYPE, 
dataType);
+
+        if (resolve == null) {
+            throw new RuntimeException("Default value do not support the type 
of " + dataType);
+        }
+
+        if (defaultValueStr.startsWith("'") && defaultValueStr.endsWith("'")) {
+            defaultValueStr = defaultValueStr.substring(1, 
defaultValueStr.length() - 1);
+        }
+
+        return resolve.cast(BinaryString.fromString(defaultValueStr));
+    }
+
+    public static void validateDefaultValue(DataType dataType, @Nullable 
String defaultValueStr) {
+        if (defaultValueStr == null) {
+            return;
+        }
+
+        try {
+            convertDefaultValue(dataType, defaultValueStr);
+        } catch (Exception e) {
+            throw new RuntimeException(
+                    "Unsupported default value `" + defaultValueStr + "` for 
type " + dataType, e);
+        }
+    }
+}
diff --git 
a/paimon-core/src/main/java/org/apache/paimon/catalog/CatalogUtils.java 
b/paimon-core/src/main/java/org/apache/paimon/catalog/CatalogUtils.java
index 1a04f7a328..7bfc2d543c 100644
--- a/paimon-core/src/main/java/org/apache/paimon/catalog/CatalogUtils.java
+++ b/paimon-core/src/main/java/org/apache/paimon/catalog/CatalogUtils.java
@@ -39,6 +39,7 @@ import org.apache.paimon.table.object.ObjectTable;
 import org.apache.paimon.table.system.AllTableOptionsTable;
 import org.apache.paimon.table.system.CatalogOptionsTable;
 import org.apache.paimon.table.system.SystemTableLoader;
+import org.apache.paimon.types.DataField;
 import org.apache.paimon.utils.InternalRowPartitionComputer;
 import org.apache.paimon.utils.Preconditions;
 
@@ -61,6 +62,7 @@ import static 
org.apache.paimon.catalog.Catalog.TABLE_DEFAULT_OPTION_PREFIX;
 import static 
org.apache.paimon.options.OptionsUtils.convertToPropertiesPrefixKey;
 import static 
org.apache.paimon.table.system.AllTableOptionsTable.ALL_TABLE_OPTIONS;
 import static 
org.apache.paimon.table.system.CatalogOptionsTable.CATALOG_OPTIONS;
+import static org.apache.paimon.utils.DefaultValueUtils.validateDefaultValue;
 import static org.apache.paimon.utils.Preconditions.checkArgument;
 
 /** Utils for {@link Catalog}. */
@@ -147,6 +149,9 @@ public class CatalogUtils {
                     "Cannot define %s for format table.",
                     PRIMARY_KEY.key());
         }
+        for (DataField field : schema.fields()) {
+            validateDefaultValue(field.type(), field.defaultValue());
+        }
     }
 
     public static void validateNamePattern(Catalog catalog, String 
namePattern) {
diff --git 
a/paimon-core/src/main/java/org/apache/paimon/schema/SchemaManager.java 
b/paimon-core/src/main/java/org/apache/paimon/schema/SchemaManager.java
index a45005744e..fed004c434 100644
--- a/paimon-core/src/main/java/org/apache/paimon/schema/SchemaManager.java
+++ b/paimon-core/src/main/java/org/apache/paimon/schema/SchemaManager.java
@@ -91,6 +91,7 @@ import static 
org.apache.paimon.catalog.AbstractCatalog.DB_SUFFIX;
 import static org.apache.paimon.catalog.Identifier.DEFAULT_MAIN_BRANCH;
 import static org.apache.paimon.catalog.Identifier.UNKNOWN_DATABASE;
 import static 
org.apache.paimon.mergetree.compact.PartialUpdateMergeFunction.SEQUENCE_GROUP;
+import static org.apache.paimon.utils.DefaultValueUtils.validateDefaultValue;
 import static org.apache.paimon.utils.FileUtils.listVersionedFiles;
 import static org.apache.paimon.utils.Preconditions.checkArgument;
 import static org.apache.paimon.utils.Preconditions.checkState;
@@ -559,13 +560,15 @@ public class SchemaManager implements Serializable {
                 updateNestedColumn(
                         newFields,
                         update.fieldNames(),
-                        (field, depth) ->
-                                new DataField(
-                                        field.id(),
-                                        field.name(),
-                                        field.type(),
-                                        field.description(),
-                                        update.newDefaultValue()),
+                        (field, depth) -> {
+                            validateDefaultValue(field.type(), 
update.newDefaultValue());
+                            return new DataField(
+                                    field.id(),
+                                    field.name(),
+                                    field.type(),
+                                    field.description(),
+                                    update.newDefaultValue());
+                        },
                         lazyIdentifier);
             } else {
                 throw new UnsupportedOperationException("Unsupported change: " 
+ change.getClass());
diff --git 
a/paimon-flink/paimon-flink-common/src/test/java/org/apache/paimon/flink/BranchSqlITCase.java
 
b/paimon-flink/paimon-flink-common/src/test/java/org/apache/paimon/flink/BranchSqlITCase.java
index 8430ff3e9e..c593db273b 100644
--- 
a/paimon-flink/paimon-flink-common/src/test/java/org/apache/paimon/flink/BranchSqlITCase.java
+++ 
b/paimon-flink/paimon-flink-common/src/test/java/org/apache/paimon/flink/BranchSqlITCase.java
@@ -52,6 +52,14 @@ public class BranchSqlITCase extends CatalogITCaseBase {
                 .containsExactlyInAnyOrder("+I[1, 5]", "+I[2, 5]");
     }
 
+    @Test
+    public void testUnsupportedDefaultValue() {
+        sql("CREATE TABLE T (a INT, b INT)");
+        assertThatThrownBy(
+                        () -> sql("CALL 
sys.alter_column_default_value('default.T', 'b', 'ddd')"))
+                .hasMessageContaining("Unsupported default value `ddd` for 
type INT");
+    }
+
     @Test
     public void testArrayDefaultValue() throws Exception {
         sql("CREATE TABLE T_ARRAY (id INT, tags ARRAY<STRING>, numbers 
ARRAY<INT>)");
diff --git 
a/paimon-spark/paimon-spark-ut/src/test/scala/org/apache/paimon/spark/sql/DefaultValueTest.scala
 
b/paimon-spark/paimon-spark-ut/src/test/scala/org/apache/paimon/spark/sql/DefaultValueTest.scala
new file mode 100644
index 0000000000..9be4d4b377
--- /dev/null
+++ 
b/paimon-spark/paimon-spark-ut/src/test/scala/org/apache/paimon/spark/sql/DefaultValueTest.scala
@@ -0,0 +1,52 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.paimon.spark.sql
+
+import org.apache.paimon.spark.PaimonSparkTestBase
+
+class DefaultValueTest extends PaimonSparkTestBase {
+
+  test("Default Value: unsupported default value") {
+    withTimeZone("Asia/Shanghai") {
+      withTable("t") {
+        assert(
+          intercept[Throwable] {
+            sql("""
+                  |CREATE TABLE t (
+                  |  a INT,
+                  |  b TIMESTAMP DEFAULT current_timestamp(),
+                  |  c TIMESTAMP_NTZ DEFAULT current_timestamp,
+                  |  d DATE DEFAULT current_date()
+                  |)
+                  |""".stripMargin)
+          }.getMessage
+            .contains("Unsupported default value `current_timestamp()`"))
+
+        sql("CREATE TABLE t (a INT DEFAULT 1)")
+        assert(
+          intercept[Throwable] {
+            sql("""
+                  |ALTER TABLE t ALTER COLUMN a SET DEFAULT current_timestamp()
+                  |""".stripMargin)
+          }.getMessage
+            .contains("Unsupported default value `current_timestamp()`"))
+      }
+    }
+  }
+}
diff --git a/paimon-spark/pom.xml b/paimon-spark/pom.xml
index 4d688ac146..0cfe5007c7 100644
--- a/paimon-spark/pom.xml
+++ b/paimon-spark/pom.xml
@@ -58,6 +58,10 @@ under the License.
                         <groupId>org.apache.hadoop</groupId>
                         <artifactId>hadoop-common</artifactId>
                     </exclusion>
+                    <exclusion>
+                        <groupId>org.apache.commons</groupId>
+                        <artifactId>commons-lang3</artifactId>
+                    </exclusion>
                 </exclusions>
             </dependency>
 

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