[ https://issues.apache.org/jira/browse/HIVE-21114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16952418#comment-16952418 ]
Hive QA commented on HIVE-21114: -------------------------------- | (x) *{color:red}-1 overall{color}* | \\ \\ || Vote || Subsystem || Runtime || Comment || || || || || {color:brown} Prechecks {color} || | {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m 0s{color} | {color:green} The patch does not contain any @author tags. {color} | || || || || {color:brown} master Compile Tests {color} || | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 9m 33s{color} | {color:green} master passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 10s{color} | {color:green} master passed {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m 43s{color} | {color:green} master passed {color} | | {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 4m 23s{color} | {color:blue} ql in master has 1548 extant Findbugs warnings. {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 4s{color} | {color:green} master passed {color} | || || || || {color:brown} Patch Compile Tests {color} || | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m 26s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 7s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m 7s{color} | {color:green} the patch passed {color} | | {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m 43s{color} | {color:red} ql: The patch generated 9 new + 303 unchanged - 5 fixed = 312 total (was 308) {color} | | {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m 0s{color} | {color:green} The patch has no whitespace issues. {color} | | {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 4m 21s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 1s{color} | {color:green} the patch passed {color} | || || || || {color:brown} Other Tests {color} || | {color:red}-1{color} | {color:red} asflicense {color} | {color:red} 0m 18s{color} | {color:red} The patch generated 3 ASF License warnings. {color} | | {color:black}{color} | {color:black} {color} | {color:black} 26m 25s{color} | {color:black} {color} | \\ \\ || Subsystem || Report/Notes || | Optional Tests | asflicense javac javadoc findbugs checkstyle compile | | uname | Linux hiveptest-server-upstream 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux | | Build tool | maven | | Personality | /data/hiveptest/working/yetus_PreCommit-HIVE-Build-19007/dev-support/hive-personality.sh | | git revision | master / fbabad1 | | Default Java | 1.8.0_111 | | findbugs | v3.0.1 | | checkstyle | http://104.198.109.242/logs//PreCommit-HIVE-Build-19007/yetus/diff-checkstyle-ql.txt | | asflicense | http://104.198.109.242/logs//PreCommit-HIVE-Build-19007/yetus/patch-asflicense-problems.txt | | modules | C: ql U: ql | | Console output | http://104.198.109.242/logs//PreCommit-HIVE-Build-19007/yetus.txt | | Powered by | Apache Yetus http://yetus.apache.org | This message was automatically generated. > Create read-only transactions > ----------------------------- > > Key: HIVE-21114 > URL: https://issues.apache.org/jira/browse/HIVE-21114 > Project: Hive > Issue Type: Bug > Components: Transactions > Affects Versions: 4.0.0 > Reporter: Eugene Koifman > Assignee: Denys Kuzmenko > Priority: Major > Attachments: HIVE-21114.1.patch, HIVE-21114.2.patch, > HIVE-21114.3.patch > > > With HIVE-21036 we have a way to indicate that a txn is read only. > We should (at least in auto-commit mode) determine if the single stmt is a > read and mark the txn accordingly. > Then we can optimize {{TxnHandler.commitTxn()}} so that it doesn't do any > checks in write_set etc. > {{TxnHandler.commitTxn()}} already starts with {{lockTransactionRecord(stmt, > txnid, TXN_OPEN)}} so it can read the txn type in the same SQL stmt. > HiveOperation only has QUERY, which includes Insert and Select, so this > requires figuring out how to determine if a query is a SELECT. By the time > {{Driver.openTransaction();}} is called, we have already parsed the query so > there should be a way to know if the statement only reads. > For multi-stmt txns (once these are supported) we should allow user to > indicate that a txn is read-only and then not allow any statements that can > make modifications in this txn. This should be a different jira. > cc [~ikryvenko] -- This message was sent by Atlassian Jira (v8.3.4#803005)