the method returns the value to be treated as null while data load concode_field_sep String blocksID concode_elem_sep String[] aggTables concode_elem_sep String databaseName concode_elem_sep String allDictPath concode_elem_sep String colDictFilePath concode_elem_sep String dateFormat concode_elem_sep boolean isDirectLoad concode_elem_sep String commentChar concode_elem_sep String maxColumns concode_elem_sep String tableName concode_elem_sep String factFilePath concode_elem_sep String segmentId concode_elem_sep String taskNo concode_elem_sep CarbonDataLoadSchema carbonDataLoadSchema concode_elem_sep String factTimeStamp concode_elem_sep String escapeChar concode_elem_sep String quoteChar concode_elem_sep String csvHeader concode_elem_sep String serializationNullFormat concode_elem_sep String partitionId concode_elem_sep String rddIteratorKey concode_elem_sep String badRecordsLoggerEnable concode_elem_sep boolean aggLoadRequest concode_elem_sep String complexDelimiterLevel1 concode_elem_sep HashMap<CarbonDimension,String> predefDictMap concode_elem_sep long serialVersionUID concode_elem_sep String complexDelimiterLevel2 concode_elem_sep String csvDelimiter concode_elem_sep String aggTableName concode_elem_sep String storePath concode_elem_sep boolean isRetentionRequest concode_elem_sep List<String> factFilesToProcess concode_elem_sep String badRecordsAction concode_elem_sep List<LoadMetadataDetails> loadMetadataDetails concode_elem_sep String dimFolderPath concode_field_sep void setTableName concode_elem_sep String getBadRecordsLoggerEnable concode_elem_sep void setRetentionRequest concode_elem_sep void setComplexDelimiterLevel1 concode_elem_sep void setCommentChar concode_elem_sep void setComplexDelimiterLevel2 concode_elem_sep boolean isDirectLoad concode_elem_sep String getRddIteratorKey concode_elem_sep void setFactFilesToProcess concode_elem_sep String getAllDictPath concode_elem_sep String getDatabaseName concode_elem_sep String getTaskNo concode_elem_sep void setAllDictPath concode_elem_sep String getFactFilePath concode_elem_sep void setDimFolderPath concode_elem_sep String getColDictFilePath concode_elem_sep void setSerializationNullFormat concode_elem_sep void setPartitionId concode_elem_sep String getMaxColumns concode_elem_sep String getPredefDictFilePath concode_elem_sep void setColDictFilePath concode_elem_sep String[] getDelimiters concode_elem_sep CarbonDataLoadSchema getCarbonDataLoadSchema concode_elem_sep String getSegmentId concode_elem_sep String getFactTimeStamp concode_elem_sep void setMaxColumns concode_elem_sep List<String> getFactFilesToProcess concode_elem_sep String getTableName concode_elem_sep void setLoadMetadataDetails concode_elem_sep String getCsvDelimiter concode_elem_sep String getBlocksID concode_elem_sep void setCsvDelimiter concode_elem_sep void setBadRecordsAction concode_elem_sep void initPredefDictMap concode_elem_sep String getCommentChar concode_elem_sep String getStorePath concode_elem_sep String getBadRecordsAction concode_elem_sep String getCsvHeader concode_elem_sep String getDateFormat concode_elem_sep String getQuoteChar concode_elem_sep void setCarbonDataLoadSchema concode_elem_sep void setEscapeChar concode_elem_sep void setAggTables concode_elem_sep void setFactTimeStamp concode_elem_sep String getComplexDelimiterLevel2 concode_elem_sep String getComplexDelimiterLevel1 concode_elem_sep void setDirectLoad concode_elem_sep void setBlocksID concode_elem_sep String getAggTableName concode_elem_sep void setSegmentId concode_elem_sep void setFactFilePath concode_elem_sep void setBadRecordsLoggerEnable concode_elem_sep boolean isAggLoadRequest concode_elem_sep String[] getAggTables concode_elem_sep void setDateFormat concode_elem_sep void setTaskNo concode_elem_sep CarbonLoadModel getCopyWithPartition concode_elem_sep CarbonLoadModel getCopyWithPartition concode_elem_sep void setQuoteChar concode_elem_sep String getDimFolderPath concode_elem_sep void setPredefDictMap concode_elem_sep void setCsvHeader concode_elem_sep void setRddIteratorKey concode_elem_sep List<LoadMetadataDetails> getLoadMetadataDetails concode_elem_sep boolean isRetentionRequest concode_elem_sep void setDatabaseName concode_elem_sep String getPartitionId concode_elem_sep String getEscapeChar concode_elem_sep void setAggLoadRequest concode_elem_sep void setStorePath concode_elem_sep void setAggTableName
String function ( ) { return serializationNullFormat ; }