[hudi] 02/29: [MINOR] Infer the preCombine field only if the value is not null (#9447)

[pwason]

This is an automated email from the ASF dual-hosted git repository.

pwason pushed a commit to branch release-0.14.0
in repository https://gitbox.apache.org/repos/asf/hudi.git

commit 3db4745a23d1c9df46881d40852824352089e477
Author: Danny Chan <yuzhao....@gmail.com>
AuthorDate: Tue Aug 15 17:03:06 2023 +0800

    [MINOR] Infer the preCombine field only if the value is not null (#9447)
    
    Table created by Spark may not have the preCombine field set up.
---
 .../hudi-flink/src/main/java/org/apache/hudi/util/CompactionUtil.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git 
a/hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/util/CompactionUtil.java
 
b/hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/util/CompactionUtil.java
index 63a00dd10c3..d14262f02e0 100644
--- 
a/hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/util/CompactionUtil.java
+++ 
b/hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/util/CompactionUtil.java
@@ -128,7 +128,9 @@ public class CompactionUtil {
    */
   public static void setPreCombineField(Configuration conf, 
HoodieTableMetaClient metaClient) {
     String preCombineField = metaClient.getTableConfig().getPreCombineField();
-    conf.setString(FlinkOptions.PRECOMBINE_FIELD, preCombineField);
+    if (preCombineField != null) {
+      conf.setString(FlinkOptions.PRECOMBINE_FIELD, preCombineField);
+    }
   }
 
   /**