Github user jackylk commented on a diff in the pull request:

    https://github.com/apache/incubator-carbondata/pull/511#discussion_r96006298
  
    --- Diff: 
integration/spark2/src/main/scala/org/apache/spark/sql/CarbonSource.scala ---
    @@ -108,6 +110,10 @@ class CarbonSource extends CreatableRelationProvider
     
         val dbName: String = parameters.getOrElse("dbName", 
CarbonCommonConstants.DATABASE_DEFAULT_NAME)
         val tableName: String = parameters.getOrElse("tableName", 
"default_table")
    +    if(org.apache.commons.lang.StringUtils.isBlank(tableName) ||
    +       org.apache.commons.lang.StringUtils.isWhitespace(tableName)) {
    +      throw new MalformedCarbonCommandException("INVALID TABLE NAME")
    --- End diff --
    
    You can say it is empty table name


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