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https://issues.apache.org/jira/browse/CALCITE-4274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17201906#comment-17201906
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Rui Wang commented on CALCITE-4274:
-----------------------------------
Per discussion in email thread, the right approach is to differentiate two
window starts (and ends) by alias. For example:
SELECT T.window_start, T.window_end, T.timestamp, F.window_start,
F.window_end
FROM TABLE(TUMBLE(TABLE(input_table) AS T, DESCRIPTOR(timestamp),
INTERVAL '5' MINUTES)) AS F
> Cascaded table-valued function windowing contains ambiguous
> window_start/window_end columns
> -------------------------------------------------------------------------------------------
>
> Key: CALCITE-4274
> URL: https://issues.apache.org/jira/browse/CALCITE-4274
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.23.0
> Reporter: liupengcheng
> Priority: Major
>
> When executing the following sql, the ValidationException is thrown:
> sql:
> {code:java}
> with subquery1 as (select * from table(TUMBLE(table MyTable3, " +
> "descriptor(eventtime1), interval '1' minute))) " +
> "select window_end from table(TUMBLE(table subquery1, " +
> "descriptor(eventtime1), interval '1' minute))
> {code}
> exceptions:
> {code:java}
> org.apache.calcite.runtime.CalciteContextException: From line 1, column 117
> to line 1, column 126: Column 'window_end' is
> ambiguousorg.apache.calcite.runtime.CalciteContextException: From line 1,
> column 117 to line 1, column 126: Column 'window_end' is ambiguous at
> sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at
> org.apache.calcite.runtime.Resources$ExInstWithCause.ex(Resources.java:457)
> at org.apache.calcite.sql.SqlUtil.newContextException(SqlUtil.java:857) at
> org.apache.calcite.sql.SqlUtil.newContextException(SqlUtil.java:842) at
> org.apache.calcite.sql.validate.SqlValidatorImpl.newValidationError(SqlValidatorImpl.java:5114)
> at
> org.apache.calcite.sql.validate.DelegatingScope.fullyQualify(DelegatingScope.java:278)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl$Expander.visit(SqlValidatorImpl.java:6012)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl$SelectExpander.visit(SqlValidatorImpl.java:6175)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl$SelectExpander.visit(SqlValidatorImpl.java:6161)
> at org.apache.calcite.sql.SqlIdentifier.accept(SqlIdentifier.java:321) at
> org.apache.calcite.sql.validate.SqlValidatorImpl.expandSelectExpr(SqlValidatorImpl.java:5595)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.expandSelectItem(SqlValidatorImpl.java:454)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.validateSelectList(SqlValidatorImpl.java:4279)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.validateSelect(SqlValidatorImpl.java:3538)
> at
> org.apache.calcite.sql.validate.SelectNamespace.validateImpl(SelectNamespace.java:60)
> at
> org.apache.calcite.sql.validate.AbstractNamespace.validate(AbstractNamespace.java:84)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.validateNamespace(SqlValidatorImpl.java:1111)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.validateQuery(SqlValidatorImpl.java:1085)
> at
> org.apache.calcite.sql.validate.WithNamespace.validateImpl(WithNamespace.java:57)
> at
> org.apache.calcite.sql.validate.AbstractNamespace.validate(AbstractNamespace.java:84)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.validateNamespace(SqlValidatorImpl.java:1111)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.validateWith(SqlValidatorImpl.java:3929)
> at org.apache.calcite.sql.SqlWith.validate(SqlWith.java:71) at
> org.apache.calcite.sql.validate.SqlValidatorImpl.validateScopedExpression(SqlValidatorImpl.java:1060)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.validate(SqlValidatorImpl.java:767)
> {code}
> I looked into the code, I think it's because we are now appending
> `window_start`/`window_end` directly when deriving row type.
> I think it's a bug in Calcite, we can fix it by deduplicate the
> window_start/window_end columns.
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