[BugFix] Fix partition live number not working (backport #49213) (#49241

)

Co-authored-by: wyb <[email protected]>

fe/fe-core/src/main/java/com/starrocks/catalog/TableProperty.java

@@ -435,6 +435,9 @@ public TableProperty buildReplicationNum() {
     }
 
     public TableProperty buildPartitionTTL() {
+        if (partitionTTLNumber != INVALID) {
+            return this;
+        }
         partitionTTLNumber = Integer.parseInt(properties.getOrDefault(PropertyAnalyzer.PROPERTIES_PARTITION_TTL_NUMBER,
                 String.valueOf(INVALID)));
         return this;

fe/fe-core/src/test/java/com/starrocks/catalog/TablePropertyTest.java

@@ -75,7 +75,6 @@ public void testNormal() throws IOException {
         in.close();
     }
 
-
     @Test
     public void testBuildDataCachePartitionDuration() throws IOException {
         // 1. Write objects to file
@@ -97,4 +96,27 @@ public void testBuildDataCachePartitionDuration() throws IOException {
         in.close();
     }
 
+    @Test
+    public void testPartitionTTLNumberSerialization() throws IOException {
+        // 1. Write objects to file
+        File file = new File(fileName);
+        file.createNewFile();
+        DataOutputStream out = new DataOutputStream(new FileOutputStream(file));
+
+        HashMap<String, String> properties = new HashMap<>();
+        properties.put(PropertyAnalyzer.PROPERTIES_PARTITION_LIVE_NUMBER, "2");
+        TableProperty tableProperty = new TableProperty(properties);
+        tableProperty.buildPartitionLiveNumber();
+        tableProperty.buildPartitionTTL();
+        Assert.assertEquals(2, tableProperty.getPartitionTTLNumber());
+        tableProperty.write(out);
+        out.flush();
+        out.close();
+
+        // 2. Read objects from file
+        DataInputStream in = new DataInputStream(new FileInputStream(file));
+        TableProperty readTableProperty = TableProperty.read(in);
+        Assert.assertEquals(2, readTableProperty.getPartitionTTLNumber());
+        in.close();
+    }
 }