wecharyu commented on code in PR #4744:
URL: https://github.com/apache/hive/pull/4744#discussion_r1421910658
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standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/impl/FindColumnsWithStatsHandler.java:
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@@ -37,11 +37,16 @@ public class FindColumnsWithStatsHandler implements
QueryHandler<List<String>> {
//language=SQL
private static final String TABLE_SELECT = "SELECT \"COLUMN_NAME\" FROM
\"TAB_COL_STATS\" " +
- "WHERE \"DB_NAME\" = :dbName AND \"TABLE_NAME\" = :tableName";
+ "INNER JOIN \"TBLS\" ON \"TAB_COL_STATS\".\"TBL_ID\" =
\"TBLS\".\"TBL_ID\" " +
Review Comment:
`UNIQUEPARTITION ` index is high performance, we have a table with 4
millions partitions, and the API`getPartitionByName` hitting the
`UNIQUEPARTITION` index only takes around 200 milliseconds.
Also let me add a benchmark test for this.
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