[GitHub] [carbondata] xuchuanyin commented on a change in pull request #3183: [CARBONDATA-3349] Show sort_columns for each segment

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xuchuanyin commented on a change in pull request #3183: [CARBONDATA-3349] Show sort_columns for each segment
URL: https://github.com/apache/carbondata/pull/3183#discussion_r278947424
 
 

 ##########
 File path: integration/spark-common/src/main/scala/org/apache/carbondata/api/CarbonStore.scala
 ##########
 @@ -145,6 +152,208 @@ object CarbonStore {
     }
   }
 
+  def showSegments(
+      limit: Option[String],
+      carbonTable: CarbonTable,
+      hadoopConf: Configuration,
+      showHistory: Boolean): Seq[Row] = {
+    val metaFolder = CarbonTablePath.getMetadataPath(carbonTable.getTablePath)
+    val loadMetadataDetailsArray = if (showHistory) {
+      SegmentStatusManager.readLoadMetadata(metaFolder) ++
+      SegmentStatusManager.readLoadHistoryMetadata(metaFolder)
+    } else {
+      SegmentStatusManager.readLoadMetadata(metaFolder)
+    }
+
+    if (loadMetadataDetailsArray.nonEmpty) {
+      var loadMetadataDetailsSortedArray = loadMetadataDetailsArray.sortWith { (l1, l2) =>
+        java.lang.Double.parseDouble(l1.getLoadName) > java.lang.Double.parseDouble(l2.getLoadName)
+      }
+      if (!showHistory) {
+        loadMetadataDetailsSortedArray = loadMetadataDetailsSortedArray
+          .filter(_.getVisibility.equalsIgnoreCase("true"))
+      }
+      if (limit.isDefined) {
+        val limitLoads = limit.get
+        try {
+          val lim = Integer.parseInt(limitLoads)
+          loadMetadataDetailsSortedArray = loadMetadataDetailsSortedArray.slice(0, lim)
+        } catch {
+          case _: NumberFormatException =>
+            CarbonException.analysisException("Entered limit is not a valid Number")
+        }
+      }
+      val tableDataMap: TableDataMap =
+        DataMapStoreManager.getInstance.getDefaultDataMap(carbonTable)
+      val readCommitScope: ReadCommittedScope =
+        new TableStatusReadCommittedScope(
+          carbonTable.getAbsoluteTableIdentifier,
+          loadMetadataDetailsSortedArray.filter(_.getVisibility.equalsIgnoreCase("true")),
+          hadoopConf)
+      loadMetadataDetailsSortedArray
+        .map { load =>
+          val mergedTo =
+            if (load.getMergedLoadName != null) {
+              load.getMergedLoadName
+            } else {
+              "NA"
+            }
+
+          val startTime =
+            if (load.getLoadStartTime == CarbonCommonConstants.SEGMENT_LOAD_TIME_DEFAULT) {
+              "NA"
+            } else {
+              new java.sql.Timestamp(load.getLoadStartTime).toString
+            }
+
+          val endTime =
+            if (load.getLoadEndTime == CarbonCommonConstants.SEGMENT_LOAD_TIME_DEFAULT) {
+              "NA"
+            } else {
+              new java.sql.Timestamp(load.getLoadEndTime).toString
+            }
+
+          val (dataSize, indexSize) = if (load.getFileFormat == FileFormat.ROW_V1) {
+            // for streaming segment, we should get the actual size from the index file
+            // since it is continuously inserting data
+            val segmentDir =
+            CarbonTablePath.getSegmentPath(carbonTable.getTablePath, load.getLoadName)
+            val indexPath = CarbonTablePath.getCarbonStreamIndexFilePath(segmentDir)
+            val indexFile = FileFactory.getCarbonFile(indexPath)
+            if (indexFile.exists()) {
+              val indices =
+                StreamSegment.readIndexFile(indexPath, FileFactory.getFileType(indexPath))
+              (indices.asScala.map(_.getFile_size).sum, indexFile.getSize)
+            } else {
+              (-1L, -1L)
+            }
+          } else {
+            // for batch segment, we can get the data size from table status file directly
+            (if (load.getDataSize == null) -1L else load.getDataSize.toLong,
 
 Review comment:
   can use `?:` operator to make it more clear or
   ```
   Option(load.getDataSize).getOrElse("-1").toLong
   ```

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