okumin commented on code in PR #5883:
URL: https://github.com/apache/hive/pull/5883#discussion_r2160233745
##########
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/DirectSqlUpdatePart.java:
##########
@@ -892,18 +892,25 @@ public List<Void> run(List<Long> input) throws Exception {
sdIdToNewCdId.containsKey(sdId) ? sdIdToNewCdId.get(sdId) : cdId);
updateSDInBatch(validSdIds, idToSd, sdIdToCdId);
- List<Long> usedIds = Batchable.runBatched(maxBatchSize, cdIdsMayDelete,
+ Set<Long> usedIds = new HashSet<>(Batchable.runBatched(maxBatchSize,
cdIdsMayDelete,
new Batchable<Long, Long>() {
@Override
public List<Long> run(List<Long> input) throws Exception {
String idLists = MetaStoreDirectSql.getIdListForIn(input);
- String queryText = "select \"CD_ID\" from \"SDS\" where \"CD_ID\"
in ( " + idLists + ")";
+ String queryText = "select \"CD_ID\" from \"SDS\" where \"CD_ID\"
in ( "
Review Comment:
I prefer `SELECT DISTINCT` for readability. But performance might rely on
RDBMS.
##########
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/DirectSqlUpdatePart.java:
##########
@@ -892,18 +892,25 @@ public List<Void> run(List<Long> input) throws Exception {
sdIdToNewCdId.containsKey(sdId) ? sdIdToNewCdId.get(sdId) : cdId);
updateSDInBatch(validSdIds, idToSd, sdIdToCdId);
- List<Long> usedIds = Batchable.runBatched(maxBatchSize, cdIdsMayDelete,
+ Set<Long> usedIds = new HashSet<>(Batchable.runBatched(maxBatchSize,
cdIdsMayDelete,
new Batchable<Long, Long>() {
@Override
public List<Long> run(List<Long> input) throws Exception {
String idLists = MetaStoreDirectSql.getIdListForIn(input);
- String queryText = "select \"CD_ID\" from \"SDS\" where \"CD_ID\"
in ( " + idLists + ")";
+ String queryText = "select \"CD_ID\" from \"SDS\" where \"CD_ID\"
in ( "
+ + idLists + ") group by \"CD_ID\"";
+ List<Long> cdIds = new ArrayList<>();
try (QueryWrapper query = new
QueryWrapper(pm.newQuery("javax.jdo.query.SQL", queryText))) {
- List<Long> sqlResult = executeWithArray(query.getInnerQuery(),
null, queryText);
- return new ArrayList<>(sqlResult);
+ List<Object> sqlResult = executeWithArray(query.getInnerQuery(),
null, queryText);
+ if (sqlResult != null) {
+ for (Object cdId : sqlResult) {
+ cdIds.add(MetastoreDirectSqlUtils.extractSqlLong(cdId));
Review Comment:
Is it necessary to use `extractSqlLong`? If not, we may have a
shorthand(with a bit more efficient ArrayList initialization, which is very
tiny).
```sql
List<Long> sqlResult = executeWithArray(query.getInnerQuery(), null,
queryText);
return sqlResult != null ? new ArrayList<>(sqlResult) :
Collections.emptyList();
```
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