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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-3510) Add ANSI_QUOTES option so that Drill's SQL Parser will recognize ANSI_SQL identifiers
Date Fri, 05 Aug 2016 20:52:20 GMT

    [ https://issues.apache.org/jira/browse/DRILL-3510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15410044#comment-15410044
] 

ASF GitHub Bot commented on DRILL-3510:
---------------------------------------

Github user vdiravka commented on a diff in the pull request:

    https://github.com/apache/drill/pull/520#discussion_r73757533
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/planner/sql/SqlConverter.java
---
    @@ -139,6 +151,24 @@ public SqlNode parse(String sql) {
           SqlParser parser = SqlParser.create(sql, parserConfig);
           return parser.parseStmt();
         } catch (SqlParseException e) {
    +
    +      // Attempt to use default back_tick quote character for identifiers when
    --- End diff --
    
    One of the requirements was still working identifiers with backticks even while ANSI_QUOTES
mode is on.
    `sql.contains("`")` condition isn't mandatory here. It was removed in a new commit.


> Add ANSI_QUOTES option so that Drill's SQL Parser will recognize ANSI_SQL identifiers

> --------------------------------------------------------------------------------------
>
>                 Key: DRILL-3510
>                 URL: https://issues.apache.org/jira/browse/DRILL-3510
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: SQL Parser
>            Reporter: Jinfeng Ni
>            Assignee: Vitalii Diravka
>             Fix For: Future
>
>         Attachments: DRILL-3510.patch, DRILL-3510.patch
>
>
> Currently Drill's SQL parser uses backtick as identifier quotes, the same as what MySQL
does. However, this is different from ANSI SQL specification, where double quote is used as
identifier quotes.  
> MySQL has an option "ANSI_QUOTES", which could be switched on/off by user. Drill should
follow the same way, so that Drill users do not have to rewrite their existing queries, if
their queries use double quotes. 
> {code}
> SET sql_mode='ANSI_QUOTES';
> {code}
>    



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