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https://issues.apache.org/jira/browse/CALCITE-2045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16356429#comment-16356429
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Shuyi Chen edited comment on CALCITE-2045 at 2/8/18 3:15 AM:
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Hi [~julianhyde], I think I'll need to extend SqlDataTypeSpec to pass the
schema (or something equivalence to provide access to the registered UDT) for
SqlDataTypeSpec.deriveType(). Otherwise, after I create a type using "_CREATE
TYPE mytype1 as int_", when I use the type to, say, _create table t (c
mytype1),_ it will fail. Because the type info is only registered in the
schema, and SqlDataTypeSpec has to access the created user-defined type through
schema. However, this might be difficult because not all call sites of
SqlDataTypeSpec.deriveType can provide access to the schema. If this is the
right option, I can try to modify all call sites to provide access to the
schema directly or indirectly. Do you have any suggestions?
was (Author: suez1224):
Hi [~julianhyde], I think I'll need to extend SqlDataTypeSpec to pass the
schema (or something equivalence to provide access to the registered UDT)
during SqlDataTypeSpec.deriveType call. Otherwise, after I create a type using
"_CREATE TYPE mytype1 as int_", when I use the type to, say, _create table t (c
mytype1),_ it will fail. Because the type info is only registered in the
schema, and SqlDataTypeSpec has to access the created user-defined type through
schema. However, this might be difficult because not all call sites of
SqlDataTypeSpec.deriveType can provide access to the schema. If this is the
right option, I can try to modify all call sites to provide access to the
schema directly or indirectly. Do you have any suggestions?
> 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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