[GitHub] [carbondata] QiangCai opened a new pull request #3898: [CARBONDATA-3960] Default column comment should be null

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QiangCai opened a new pull request #3898:
URL: https://github.com/apache/carbondata/pull/3898


    ### Why is this PR needed?
   1. column comment is an empty string by default when adding a column
   2. there are too many redundancy codes
   
    ### What changes were proposed in this PR?
   1. change default column comment to null
   2. re-factory code
   
    ### Does this PR introduce any user interface change?
    - No
   
    ### Is any new testcase added?
    - Yes
   
       
   


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CarbonDataQA1 commented on pull request #3898:
URL: https://github.com/apache/carbondata/pull/3898#issuecomment-680080019


   Build Success with Spark 2.3.4, Please check CI http://121.244.95.60:12545/job/ApacheCarbonPRBuilder2.3/3862/
   


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CarbonDataQA1 commented on pull request #3898:
URL: https://github.com/apache/carbondata/pull/3898#issuecomment-680082252


   Build Success with Spark 2.4.5, Please check CI http://121.244.95.60:12545/job/ApacheCarbon_PR_Builder_2.4.5/2121/
   


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akashrn5 commented on a change in pull request #3898:
URL: https://github.com/apache/carbondata/pull/3898#discussion_r478994240



##########
File path: integration/spark/src/main/scala/org/apache/spark/sql/parser/CarbonSpark2SqlParser.scala
##########
@@ -693,7 +693,7 @@ class CarbonSpark2SqlParser extends CarbonDDLSqlParser {
       var columnComment: String = ""
       var plainComment: String = ""
       if (col.getComment().isDefined) {
-        columnComment = " comment \"" + col.getComment().get + "\""
+        columnComment = " comment '" + col.getComment().get + "'"

Review comment:
       why this change? I didn't get the reason




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QiangCai commented on a change in pull request #3898:
URL: https://github.com/apache/carbondata/pull/3898#discussion_r479598589



##########
File path: integration/spark/src/main/scala/org/apache/spark/sql/parser/CarbonSpark2SqlParser.scala
##########
@@ -693,7 +693,7 @@ class CarbonSpark2SqlParser extends CarbonDDLSqlParser {
       var columnComment: String = ""
       var plainComment: String = ""
       if (col.getComment().isDefined) {
-        columnComment = " comment \"" + col.getComment().get + "\""
+        columnComment = " comment '" + col.getComment().get + "'"

Review comment:
       Double quotes will lead column comments to be null in some spark versions.
   
   




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akashrn5 commented on pull request #3898:
URL: https://github.com/apache/carbondata/pull/3898#issuecomment-684773205


   retest this please


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CarbonDataQA1 commented on pull request #3898:
URL: https://github.com/apache/carbondata/pull/3898#issuecomment-684838466


   Build Success with Spark 2.4.5, Please check CI http://121.244.95.60:12545/job/ApacheCarbon_PR_Builder_2.4.5/2207/
   


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CarbonDataQA1 commented on pull request #3898:
URL: https://github.com/apache/carbondata/pull/3898#issuecomment-684845760


   Build Failed  with Spark 2.3.4, Please check CI http://121.244.95.60:12545/job/ApacheCarbonPRBuilder2.3/3947/
   


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akashrn5 commented on pull request #3898:
URL: https://github.com/apache/carbondata/pull/3898#issuecomment-684935390


   retest this please


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CarbonDataQA1 commented on pull request #3898:
URL: https://github.com/apache/carbondata/pull/3898#issuecomment-685014264


   Build Success with Spark 2.3.4, Please check CI http://121.244.95.60:12545/job/ApacheCarbonPRBuilder2.3/3955/
   


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CarbonDataQA1 commented on pull request #3898:
URL: https://github.com/apache/carbondata/pull/3898#issuecomment-685018314


   Build Success with Spark 2.4.5, Please check CI http://121.244.95.60:12545/job/ApacheCarbon_PR_Builder_2.4.5/2215/
   


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QiangCai commented on a change in pull request #3898:
URL: https://github.com/apache/carbondata/pull/3898#discussion_r481766413



##########
File path: integration/spark/src/main/scala/org/apache/spark/sql/execution/command/carbonTableSchemaCommon.scala
##########
@@ -624,9 +625,7 @@ class TableNewProcessor(cm: TableModel) {
     if (isVarcharColumn(colName)) {
       columnSchema.setDataType(DataTypes.VARCHAR)
     }
-    // TODO: Need to fill RowGroupID, converted type

Review comment:
       not required now




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akashrn5 commented on pull request #3898:
URL: https://github.com/apache/carbondata/pull/3898#issuecomment-685326743


   LGTM


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asfgit closed pull request #3898:
URL: https://github.com/apache/carbondata/pull/3898


   


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