[GitHub] [carbondata] jackylk commented on a change in pull request #3449: [CARBONDATA-3578] Make table status file smaller

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jackylk commented on a change in pull request #3449: [CARBONDATA-3578] Make table status file smaller
URL: https://github.com/apache/carbondata/pull/3449#discussion_r346250099
 
 

 ##########
 File path: core/src/main/java/org/apache/carbondata/core/statusmanager/LoadMetadataDetails.java
 ##########
 @@ -468,4 +482,26 @@ public boolean isCarbonFormat() {
     return getFileFormat().equals(FileFormat.COLUMNAR_V3)
         || getFileFormat().equals(FileFormat.ROW_V1);
   }
+
+  /**
+   * Before writing table status file, call this to make the metadata smaller.
+   * It checks if fields are default value, then make it null so GSON does not write it
+   */
+  void removeUnnecessaryField() {
+    if (updateDeltaEndTimestamp == null || updateDeltaStartTimestamp.isEmpty()) {
+      updateDeltaEndTimestamp = null;
+    }
+    if (updateDeltaStartTimestamp == null || updateDeltaStartTimestamp.isEmpty()) {
+      updateDeltaStartTimestamp = null;
+    }
+    if (updateStatusFileName == null || updateStatusFileName.isEmpty()) {
+      updateStatusFileName = null;
+    }
+    if (visibility == null || visibility.equals("true")) {
+      visibility = null;
+    }
+    if (fileFormat == null || fileFormat.equals(FileFormat.COLUMNAR_V3.toString())) {
 
 Review comment:
   fixed

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