Jibing-Li commented on code in PR #38990:
URL: https://github.com/apache/doris/pull/38990#discussion_r1706485695
##########
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 could be expensive when the table is large. But it's not related to
this pr, we can try to improve this in a separate pr if needed.
##########
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:
I checked the code, the table may be null when the iceberg metadata cache is
not loaded. But I think it's not a problem, because the NPE would be caught in
the caller and return the default value -1. Meanwhile it will trigger iceberg
metadata cache to load the table so we can get it next time. I think we can fix
this in a separate pr if needed. But I feel we don't need to do anything about
it right now.
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