[jira] [Commented] (CALCITE-4080) Exception occurs when parsing quoted aliases for select columns

["Julian Hyde (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-4080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17142535#comment-17142535 ] 

Julian Hyde commented on CALCITE-4080:
--------------------------------------

Not a bug. Your SQL is invalid under all possible dialect settings. Single quotes are not supported for quoting identifiers. The options for quoting identifiers are double-quote (like Oracle and PostgreSQL), back-tick (like MySQL) and brackets (like MSSQL). Single quotes are for quoting character literals.

> Exception occurs when parsing quoted aliases for select columns
> ---------------------------------------------------------------
>
>                 Key: CALCITE-4080
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4080
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.23.0
>            Reporter: Dan Cojocaru
>            Priority: Major
>
> Exception occurs while parsing query with quoted alias for select columns. 
> {code:java}
> final FrameworkConfig config = Frameworks.newConfigBuilder()
> .parserConfig(SqlParser.configBuilder().setLex(Lex.MYSQL)
> .setConformance(SqlConformanceEnum.MYSQL_5).build())
> .programs(Programs.ofRules(Programs.RULE_SET))
> .build(); 
> Planner p = Frameworks.getPlanner(config); 
> SqlNode n = p.parse("SELECT 1 AS 'some alias' from dual");
> {code}
> The following exception is thrown: 
> {code:java}
> org.apache.calcite.sql.parser.SqlParseException: Encountered "\'some alias\'" at line 1, column 13.
> Was expecting one of:
>     <BRACKET_QUOTED_IDENTIFIER> ...
>     <QUOTED_IDENTIFIER> ...
>     <BACK_QUOTED_IDENTIFIER> ...
>     <IDENTIFIER> ...
>     <UNICODE_QUOTED_IDENTIFIER> ...{code}
> If query is changed into :  
> {code:java}
> "SELECT 1 AS some_alias from dual"
> {code}
> the query is parsed correctly.
>  
> Quoted aliases ( e.g:  'some alias' ) {color:#172b4d}should be valid as well.{color}



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