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Posted to commits@druid.apache.org by GitBox <gi...@apache.org> on 2021/12/04 15:13:55 UTC

[GitHub] [druid] FrankChen021 commented on a change in pull request #11894: Creating an index based on druid_segments(datasource, used, start, end)

FrankChen021 commented on a change in pull request #11894:
URL: https://github.com/apache/druid/pull/11894#discussion_r762435841



##########
File path: server/src/main/java/org/apache/druid/metadata/SQLMetadataConnector.java
##########
@@ -283,6 +283,11 @@ public void createSegmentTable(final String tableName)
                 "CREATE INDEX idx_%1$s_datasource_used_end ON %1$s(dataSource, used, %2$send%2$s)",
                 tableName,
                 getQuoteString()
+            ),
+            StringUtils.format(
+                "CREATE INDEX idx_%1$s_datasource_used_start_end ON %1$s(dataSource, used, start, %2$send%2$s)",
+                tableName,
+                getQuoteString()

Review comment:
       Sorry for the late reply. How about put the ‘start’ field after ‘end’ field so that it’s the prefix of (datasource, used, end) query? I think you could try to explain queries to see how the index is used.




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