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https://issues.apache.org/jira/browse/CALCITE-2045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16356593#comment-16356593
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Julian Hyde commented on CALCITE-2045:
--------------------------------------
Don't add that kind of stuff to {{SqlDataTypeSpec}}. As a sub-class of
{{SqlNode}}, it is an AST node, and should only have the information in the raw
SQL; nothing should be 'resolved'.
It is the validator's job to figure out types. For an expression, you call
{{RelDataType SqlValidator.getValidatedNodeType(SqlNode)}}. For a
{{SqlDataTypeSpec}}, you could actually call the same method. It will use the
{{SqlValidatorCatalogReader}} inside the validator. This has methods
{{CalciteSchema getRootSchema()}} and {{RelDataType getNamedType(SqlIdentifier
typeName)}}, both of which you will find useful.
> Support "CREATE TYPE" DDL
> -------------------------
>
> Key: CALCITE-2045
> URL: https://issues.apache.org/jira/browse/CALCITE-2045
> Project: Calcite
> Issue Type: New Feature
> Components: core
> Reporter: Shuyi Chen
> Assignee: Shuyi Chen
> Priority: Major
>
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