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

["Dan Cojocaru (Jira)" <ji...@apache.org>]

Dan Cojocaru created CALCITE-4080:
-------------------------------------

             Summary: 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


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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