[ https://issues.apache.org/jira/browse/HIVE-20890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17126068#comment-17126068 ]
Hive QA commented on HIVE-20890: -------------------------------- | (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:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 1m 0s{color} | {color:blue} Maven dependency ordering for branch {color} | | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 8m 57s{color} | {color:green} master passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 21s{color} | {color:green} master passed {color} | | {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 1m 8s{color} | {color:green} master passed {color} | | {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 0m 34s{color} | {color:blue} common in master has 63 extant Findbugs warnings. {color} | | {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 3m 54s{color} | {color:blue} ql in master has 1522 extant Findbugs warnings. {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 12s{color} | {color:green} master passed {color} | || || || || {color:brown} Patch Compile Tests {color} || | {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 15s{color} | {color:blue} Maven dependency ordering for patch {color} | | {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 1m 42s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} compile {color} | {color:green} 1m 24s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} javac {color} | {color:green} 1m 24s{color} | {color:green} the patch passed {color} | | {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m 54s{color} | {color:red} ql: The patch generated 13 new + 219 unchanged - 5 fixed = 232 total (was 224) {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 43s{color} | {color:green} the patch passed {color} | | {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 1m 14s{color} | {color:green} the patch passed {color} | || || || || {color:brown} Other Tests {color} || | {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m 12s{color} | {color:green} The patch does not generate ASF License warnings. {color} | | {color:black}{color} | {color:black} {color} | {color:black} 29m 34s{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-22747/dev-support/hive-personality.sh | | git revision | master / 1271d08 | | Default Java | 1.8.0_111 | | findbugs | v3.0.1 | | checkstyle | http://104.198.109.242/logs//PreCommit-HIVE-Build-22747/yetus/diff-checkstyle-ql.txt | | modules | C: common ql U: . | | Console output | http://104.198.109.242/logs//PreCommit-HIVE-Build-22747/yetus.txt | | Powered by | Apache Yetus http://yetus.apache.org | This message was automatically generated. > ACID: Allow whole table ReadLocks to skip all partition locks > ------------------------------------------------------------- > > Key: HIVE-20890 > URL: https://issues.apache.org/jira/browse/HIVE-20890 > Project: Hive > Issue Type: Improvement > Components: Transactions > Reporter: Gopal Vijayaraghavan > Assignee: Denys Kuzmenko > Priority: Major > Attachments: HIVE-20890.1.patch, HIVE-20890.2.patch, > HIVE-20890.3.patch, HIVE-20890.4.patch > > > HIVE-19369 proposes adding a EXCL_WRITE lock which does not wait for any > SHARED_READ locks for read operations - in the presence of that lock, the > insert overwrite no longer takes an exclusive lock. > The only exclusive operation will be a schema change or drop table, which > should take an exclusive lock on the entire table directly. > {code} > explain locks select * from tpcds_bin_partitioned_orc_1000.store_sales where > ss_sold_date_sk=2452626 > +----------------------------------------------------+ > | Explain | > +----------------------------------------------------+ > | LOCK INFORMATION: | > | tpcds_bin_partitioned_orc_1000.store_sales -> SHARED_READ | > | tpcds_bin_partitioned_orc_1000.store_sales.ss_sold_date_sk=2452626 -> > SHARED_READ | > +----------------------------------------------------+ > {code} > So the per-partition SHARED_READ locks are no longer necessary, if the lock > builder already includes the table-wide SHARED_READ locks. > The removal of entire partitions is the only part which needs to be taken > care of within this semantics as row-removal instead of directory removal > (i.e "drop partition" -> "truncate partition" and have the truncation trigger > a whole directory cleaner, so that the partition disappears when there are 0 > rows left). -- This message was sent by Atlassian Jira (v8.3.4#803005)