niuge01 commented on a change in pull request #3606: [CARBONDATA-3681] Change
default compressor to zstd
URL: https://github.com/apache/carbondata/pull/3606#discussion_r376770522
##########
File path:
core/src/main/java/org/apache/carbondata/core/util/path/CarbonTablePath.java
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@@ -285,17 +286,39 @@ public static String getSegmentPath(String tablePath,
String segmentId) {
}
/**
- * Gets data file name only with out path
- *
- * @param filePartNo data file part number
- * @param taskNo task identifier
- * @param factUpdateTimeStamp unique identifier to identify an update
- * @return gets data file name only with out path
+ * Gets data file name only, without parent path
*/
public static String getCarbonDataFileName(Integer filePartNo, String
taskNo, int bucketNumber,
- int batchNo, String factUpdateTimeStamp, String segmentNo) {
- return DATA_PART_PREFIX + filePartNo + "-" + taskNo + BATCH_PREFIX +
batchNo + "-"
- + bucketNumber + "-" + segmentNo + "-" + factUpdateTimeStamp +
CARBON_DATA_EXT;
+ int batchNo, String factUpdateTimeStamp, String segmentNo, String
compressor) {
+ Objects.requireNonNull(filePartNo);
+ Objects.requireNonNull(taskNo);
+ Objects.requireNonNull(factUpdateTimeStamp);
+ Objects.requireNonNull(compressor);
+
+ // Start from CarbonData 2.0, the data file name patten is:
+ // partNo-taskNo-batchNo-bucketNo-segmentNo-timestamp.compressor.carbondata
+ // For example:
+ // part-0-0_batchno0-0-0-1580982686749.zstd.carbondata
+ //
+ // If the compressor name is missing, the file is compressed by snappy,
which is
+ // the default compressor in CarbonData 1.x
+
+ return new StringBuffer().append(DATA_PART_PREFIX)
Review comment:
There is need not use StringBuffer to build string, just use string concat
will be ok.
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