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

Dan Cojocaru updated CALCITE-4080:
----------------------------------
    Description: 
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.

  was:
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.


> 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.



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