Jibing-Li commented on code in PR #21207:
URL: https://github.com/apache/doris/pull/21207#discussion_r1246007116
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fe/fe-core/src/main/java/org/apache/doris/catalog/external/HMSExternalTable.java:
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@@ -433,5 +467,83 @@ private void initPartitionColumns(List<Column> schema) {
LOG.debug("get {} partition columns for table: {}",
partitionColumns.size(), name);
}
+ private long getHiveRowCount() {
+ Map<String, String> parameters = remoteTable.getParameters();
+ if (parameters == null) {
+ return -1;
+ }
+ if (parameters.containsKey(NUM_ROWS)) {
+ return Long.parseLong(parameters.get(NUM_ROWS));
+ }
+ if (!parameters.containsKey(TOTAL_SIZE)) {
+ return -1;
+ }
+ long totalSize = Long.parseLong(parameters.get(TOTAL_SIZE));
+ long estimatedRowSize = 0;
+ for (Column column : getFullSchema()) {
+ estimatedRowSize += column.getDataType().getSlotSize();
+ }
+ if (estimatedRowSize == 0) {
+ return 1;
+ }
+ return totalSize / estimatedRowSize;
+ }
+
+ private long getIcebergRowCount() {
+ long rowCount = 0;
+ try {
+ Table icebergTable =
HiveMetaStoreClientHelper.getIcebergTable(this);
+ TableScan tableScan = icebergTable.newScan().includeColumnStats();
+ for (FileScanTask task : tableScan.planFiles()) {
+ rowCount += task.file().recordCount();
+ }
+ return rowCount;
+ } catch (Exception e) {
+ LOG.warn(String.format("Fail to collect row count for db %s table
%s", dbName, name), e);
+ }
+ return -1;
+ }
+
+ private long getRowCountFromFileList() {
Review Comment:
Using cache to avoid call this function every time, only call it once for
the first time.
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