[jira] [Resolved] (CALCITE-5718) Referencing column alias in WHERE clause

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

     [ https://issues.apache.org/jira/browse/CALCITE-5718?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julian Hyde resolved CALCITE-5718.
----------------------------------
    Fix Version/s: 1.35.0
       Resolution: Duplicate

> Referencing column alias in WHERE clause
> ----------------------------------------
>
>                 Key: CALCITE-5718
>                 URL: https://issues.apache.org/jira/browse/CALCITE-5718
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.34.0
>            Reporter: Zine eddine Zidane
>            Priority: Blocker
>             Fix For: 1.35.0
>
>
> Does calcite support referencing column aliases in WHERE clause? I know SQL doesn't allow this but it is supported out of the box in databases such as redshift, bigquery etc..
> The following query (for the sake of the example) fails with the error message below:
> Query: 
>  
> {code:java}
> SELECT (CASE WHEN deptno = 20 THEN deptno ELSE NULL END) AS deptno_20 FROM emp WHERE deptno_20 = 20;{code}
>  
> Error:
>  
> {code:java}
> org.apache.calcite.sql.validate.SqlValidatorException: Column 'W_20' not found in any table
>     at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>     at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
>     at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
>     at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
>     at org.apache.calcite.runtime.Resources$ExInstWithCause.ex(Resources.java:505)
>     at org.apache.calcite.runtime.Resources$ExInst.ex(Resources.java:599)
>     at org.apache.calcite.sql.SqlUtil.newContextException(SqlUtil.java:945)
>     at org.apache.calcite.sql.SqlUtil.newContextException(SqlUtil.java:930)
>     at org.apache.calcite.sql.validate.SqlValidatorImpl.newValidationError(SqlValidatorImpl.java:5408)
>     at org.apache.calcite.sql.validate.DelegatingScope.fullyQualify(DelegatingScope.java:286)
>     at org.apache.calcite.sql.validate.SqlValidatorImpl$Expander.visit(SqlValidatorImpl.java:6573)
>     at org.apache.calcite.sql.validate.SqlValidatorImpl$Expander.visit(SqlValidatorImpl.java:6553)
>     at org.apache.calcite.sql.SqlIdentifier.accept(SqlIdentifier.java:324)
>     at org.apache.calcite.sql.util.SqlShuttle$CallCopyingArgHandler.visitChild(SqlShuttle.java:134)
>     at org.apache.calcite.sql.util.SqlShuttle$CallCopyingArgHandler.visitChild(SqlShuttle.java:101)
>     at org.apache.calcite.sql.SqlOperator.acceptCall(SqlOperator.java:954)
>     at org.apache.calcite.sql.validate.SqlValidatorImpl$Expander.visitScoped(SqlValidatorImpl.java:6593)
>     at org.apache.calcite.sql.validate.SqlScopedShuttle.visit(SqlScopedShuttle.java:54)
>     at org.apache.calcite.sql.validate.SqlScopedShuttle.visit(SqlScopedShuttle.java:37)
>     at org.apache.calcite.sql.SqlCall.accept(SqlCall.java:161)
>     at org.apache.calcite.sql.validate.SqlValidatorImpl$Expander.go(SqlValidatorImpl.java:6562)
>     at org.apache.calcite.sql.validate.SqlValidatorImpl.expand(SqlValidatorImpl.java:6144)
>     at org.apache.calcite.sql.validate.SqlValidatorImpl.validateWhereClause(SqlValidatorImpl.java:4450)
>     at org.apache.calcite.sql.validate.SqlValidatorImpl.validateSelect(SqlValidatorImpl.java:3737)
>     at org.apache.calcite.sql.validate.SelectNamespace.validateImpl(SelectNamespace.java:61)
>     at org.apache.calcite.sql.validate.AbstractNamespace.validate(AbstractNamespace.java:88)
>     at org.apache.calcite.sql.validate.SqlValidatorImpl.validateNamespace(SqlValidatorImpl.java:1114)
>     at org.apache.calcite.sql.validate.SqlValidatorImpl.validateQuery(SqlValidatorImpl.java:1085)
>     at org.apache.calcite.sql.SqlSelect.validate(SqlSelect.java:248)
>     at org.apache.calcite.sql.validate.SqlValidatorImpl.validateScopedExpression(SqlValidatorImpl.java:1060)
>     at org.apache.calcite.sql.validate.SqlValidatorImpl.validate(SqlValidatorImpl.java:766) {code}
>  
>  



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