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ASF GitHub Bot logged work on HIVE-25879: ----------------------------------------- Author: ASF GitHub Bot Created on: 13/Jun/22 15:30 Start Date: 13/Jun/22 15:30 Worklog Time Spent: 10m Work Description: kgyrtkirk commented on code in PR #3348: URL: https://github.com/apache/hive/pull/3348#discussion_r895859650 ########## standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/MetaStoreDirectSql.java: ########## @@ -316,17 +316,20 @@ private boolean ensureDbInit() { } private boolean runTestQuery() { + boolean doTrace = LOG.isDebugEnabled(); Transaction tx = pm.currentTransaction(); boolean doCommit = false; if (!tx.isActive()) { tx.begin(); doCommit = true; } // Run a self-test query. If it doesn't work, we will self-disable. What a PITA... - String selfTestQuery = "select \"DB_ID\" from " + DBS + ""; + String selfTestQuery = "select \"DB_ID\" from " + DBS + " WHERE \"DB_ID\"=1"; Review Comment: `where 1=0` sounds good to me...or `DB_ID=-1`; but this will be ok as well Issue Time Tracking ------------------- Worklog Id: (was: 780869) Time Spent: 1.5h (was: 1h 20m) > MetaStoreDirectSql test query should not query the whole DBS table > ------------------------------------------------------------------ > > Key: HIVE-25879 > URL: https://issues.apache.org/jira/browse/HIVE-25879 > Project: Hive > Issue Type: Bug > Reporter: Miklos Szurap > Priority: Major > Labels: pull-request-available > Time Spent: 1.5h > Remaining Estimate: 0h > > The runTestQuery() in the > org/apache/hadoop/hive/metastore/MetaStoreDirectSql.java is using a test query > {code:java} > select "DB_ID" from "DBS"{code} > to determine whether the direct SQL can be used. > With larger deployments with many (10k+) Hive databases it would be more > efficienct to query a small table instead, for example the "VERSION" table > should always have a single row only. -- This message was sent by Atlassian Jira (v8.20.7#820007)