morrySnow commented on code in PR #38990:
URL: https://github.com/apache/doris/pull/38990#discussion_r1706392957
##########
fe/fe-core/src/main/java/org/apache/doris/datasource/ExternalRowCountCache.java:
##########
@@ -86,56 +86,50 @@ protected Optional<Long> doLoad(RowCountKey rowCountKey) {
TableIf table =
StatisticsUtil.findTable(rowCountKey.catalogId, rowCountKey.dbId,
rowCountKey.tableId);
return Optional.of(table.fetchRowCount());
} catch (Exception e) {
- LOG.warn("Failed to get table with catalogId {}, dbId {},
tableId {}", rowCountKey.catalogId,
- rowCountKey.dbId, rowCountKey.tableId);
- return Optional.empty();
+ LOG.warn("Failed to get table row count with catalogId {},
dbId {}, tableId {}. Reason {}",
+ rowCountKey.catalogId, rowCountKey.dbId,
rowCountKey.tableId, e.getMessage());
+ LOG.debug(e);
+ return null;
Review Comment:
why return `null` instead of `Optional.empty()`. null will raise npe when do
`orElse()` in `getCachedRowCount`?
##########
fe/fe-core/src/main/java/org/apache/doris/datasource/paimon/PaimonExternalTable.java:
##########
@@ -187,22 +187,17 @@ public BaseAnalysisTask createAnalysisTask(AnalysisInfo
info) {
@Override
public long fetchRowCount() {
makeSureInitialized();
- try {
- long rowCount = 0;
- Optional<SchemaCacheValue> schemaCacheValue =
getSchemaCacheValue();
- Table paimonTable = schemaCacheValue.map(value ->
((PaimonSchemaCacheValue) value).getPaimonTable())
- .orElse(null);
- if (paimonTable == null) {
- return -1;
- }
- List<Split> splits =
paimonTable.newReadBuilder().newScan().plan().splits();
- for (Split split : splits) {
- rowCount += split.rowCount();
- }
- return rowCount;
- } catch (Exception e) {
- LOG.warn("Fail to collect row count for db {} table {}", dbName,
name, e);
+ long rowCount = 0;
+ Optional<SchemaCacheValue> schemaCacheValue = getSchemaCacheValue();
+ Table paimonTable = schemaCacheValue.map(value ->
((PaimonSchemaCacheValue) value).getPaimonTable())
+ .orElse(null);
+ if (paimonTable == null) {
+ return -1;
+ }
+ List<Split> splits =
paimonTable.newReadBuilder().newScan().plan().splits();
Review Comment:
this is very expensive?
##########
fe/fe-core/src/main/java/org/apache/doris/datasource/iceberg/IcebergUtils.java:
##########
@@ -592,22 +592,17 @@ public static List<Column> getSchema(ExternalCatalog
catalog, String dbName, Str
* @return estimated row count
*/
public static long getIcebergRowCount(ExternalCatalog catalog, String
dbName, String tbName) {
- try {
- Table icebergTable = Env.getCurrentEnv()
- .getExtMetaCacheMgr()
- .getIcebergMetadataCache()
- .getIcebergTable(catalog, dbName, tbName);
- Snapshot snapshot = icebergTable.currentSnapshot();
- if (snapshot == null) {
- // empty table
- return 0;
- }
- Map<String, String> summary = snapshot.summary();
- return Long.parseLong(summary.get(TOTAL_RECORDS)) -
Long.parseLong(summary.get(TOTAL_POSITION_DELETES));
- } catch (Exception e) {
- LOG.warn("Fail to collect row count for db {} table {}", dbName,
tbName, e);
+ Table icebergTable = Env.getCurrentEnv()
+ .getExtMetaCacheMgr()
+ .getIcebergMetadataCache()
+ .getIcebergTable(catalog, dbName, tbName);
+ Snapshot snapshot = icebergTable.currentSnapshot();
Review Comment:
icebergTable could be null?
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