[jira] [Closed] (CALCITE-4080) Allow character literals as column aliases, if SqlConformance.allowCharLiteralAlias()

["Andrei Sereda (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-4080?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrei Sereda closed CALCITE-4080.
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Released as part of 1.25 ([68b02dfd4af15bc|https://github.com/apache/calcite/commit/68b02dfd4af15bc94a91a0cd2a30655d04439555])

> Allow character literals as column aliases, if SqlConformance.allowCharLiteralAlias()
> -------------------------------------------------------------------------------------
>
>                 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
>            Assignee: Julian Hyde
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.25.0
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> 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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