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https://issues.apache.org/jira/browse/HIVE-21336?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16780321#comment-16780321
 ] 

Hive QA commented on HIVE-21336:
--------------------------------

| (/) *{color:green}+1 overall{color}* |
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|| 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 
 9s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
23s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
34s{color} | {color:green} the patch passed {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} javadoc {color} | {color:green}  0m 
23s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
15s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 10m 59s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Optional Tests |  asflicense  javac  javadoc  |
| uname | Linux hiveptest-server-upstream 3.16.0-4-amd64 #1 SMP Debian 
3.16.36-1+deb8u1 (2016-09-03) x86_64 GNU/Linux |
| Build tool | maven |
| Personality | 
/data/hiveptest/working/yetus_PreCommit-HIVE-Build-16287/dev-support/hive-personality.sh
 |
| git revision | master / 2655eac |
| Default Java | 1.8.0_111 |
| modules | C: standalone-metastore/metastore-server U: 
standalone-metastore/metastore-server |
| Console output | 
http://104.198.109.242/logs//PreCommit-HIVE-Build-16287/yetus.txt |
| Powered by | Apache Yetus    http://yetus.apache.org |


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> HMS Index PCS_STATS_IDX too long for Oracle when NLS_LENGTH_SEMANTICS=char
> --------------------------------------------------------------------------
>
>                 Key: HIVE-21336
>                 URL: https://issues.apache.org/jira/browse/HIVE-21336
>             Project: Hive
>          Issue Type: Improvement
>          Components: Metastore
>    Affects Versions: 3.0.0
>            Reporter: Naveen Gangam
>            Assignee: Naveen Gangam
>            Priority: Major
>         Attachments: HIVE-21336.patch
>
>
> CREATE INDEX PCS_STATS_IDX ON PAR T_COL_STATS 
> (DB_NAME,TABLE_NAME,COLUMN_NAME,PARTITION_NAME) 
> Error: ORA-01450: maximum key length (6398) exceeded (state=72000,code=1450) 
> Customer tried the same DDL in SQLDevloper, and got the same error. This 
> could be a result of combination of DB level settings like the db_block_size, 
> limiting the maximum key length, as per below doc: 
> http://www.dba-oracle.com/t_ora_01450_maximum_key_length_exceeded.htm 
> Also {{NLS_LENGTH_SEMANTICS}} is by default BYTE, but users can set this at 
> the session level to CHAR, thus reducing the max size of the index length. We 
> have increased the size of the COLUMN_NAME from 128 to 767 (used to be at 
> 1000) and TABLE_NAME from 128 to 256. This by setting 
> {code} 
> CREATE TABLE PART_COL_STATS ( 
> CS_ID NUMBER NOT NULL, 
> DB_NAME VARCHAR2(128) NOT NULL, 
> TABLE_NAME VARCHAR2(256) NOT NULL, 
> PARTITION_NAME VARCHAR2(767) NOT NULL, 
> COLUMN_NAME VARCHAR2(767) NOT NULL, .... 
> CREATE INDEX PCS_STATS_IDX ON PART_COL_STATS 
> (DB_NAME,TABLE_NAME,COLUMN_NAME,PARTITION_NAME); 
> {code} 
> Reproducer: 
> {code} 
> SQL*Plus: Release 11.2.0.2.0 Production on Wed Feb 27 11:02:16 2019 Copyright 
> (c) 1982, 2011, Oracle. All rights reserved. 
> Connected to: Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit 
> Production 
> SQL> select * from v$nls_parameters where parameter = 'NLS_LENGTH_SEMANTICS'; 
> PARAMETER 
> ---------------------------------------------------------------- 
> VALUE 
> ---------------------------------------------------------------- 
> NLS_LENGTH_SEMANTICS 
> BYTE 
> SQL> alter session set NLS_LENGTH_SEMANTICS=CHAR; Session altered. 
> SQL> commit; Commit complete. 
> SQL> select * from v$nls_parameters where parameter = 'NLS_LENGTH_SEMANTICS'; 
> PARAMETER 
> ---------------------------------------------------------------- 
> VALUE 
> ---------------------------------------------------------------- 
> NLS_LENGTH_SEMANTICS 
> CHAR 
> SQL> CREATE TABLE PART_COL_STATS (CS_ID NUMBER NOT NULL, DB_NAME 
> VARCHAR2(128) NOT NULL, TABLE_NAME VARCHAR2(256) NOT NULL, PARTITION_NAME 
> VARCHAR2(767) NOT NULL, COLUMN_NAME VARCHAR2(767) NOT NULL); 
> Table created. 
> SQL> CREATE INDEX PCS_STATS_IDX ON PART_COL_STATS 
> (DB_NAME,TABLE_NAME,COLUMN_NAME,PARTITION_NAME); 
> CREATE INDEX PCS_STATS_IDX ON PART_COL_STATS 
> (DB_NAME,TABLE_NAME,COLUMN_NAME,PARTITION_NAME) 
> * ERROR at line 1: ORA-01450: maximum key length (6398) exceeded 
> SQL> alter session set NLS_LENGTH_SEMANTICS=BYTE; 
> Session altered. 
> SQL> commit; 
> Commit complete. 
> SQL> drop table PART_COL_STATS; 
> Table dropped. 
> SQL> commit; 
> Commit complete. 
> SQL> CREATE TABLE PART_COL_STATS (CS_ID NUMBER NOT NULL, DB_NAME 
> VARCHAR2(128) NOT NULL, TABLE_NAME VARCHAR2(256) NOT NULL, PARTITION_NAME 
> VARCHAR2(767) NOT NULL, COLUMN_NAME VARCHAR2(767) NOT NULL); 
> Table created. 
> SQL> CREATE INDEX PCS_STATS_IDX ON PART_COL_STATS 
> (DB_NAME,TABLE_NAME,COLUMN_NAME,PARTITION_NAME); 
> Index created. 
> SQL> commit; 
> Commit complete. 
> SQL> 
> {code}



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