[jira] [Created] (CALCITE-5549) Appropriately set `DATA_TYPE` and `IS_GENERATEDCOLUMN` metadata values for `MEASURE` types

["TJ Banghart (Jira)" <ji...@apache.org>]

TJ Banghart created CALCITE-5549:
------------------------------------

             Summary: Appropriately set `DATA_TYPE` and `IS_GENERATEDCOLUMN` metadata values for `MEASURE` types
                 Key: CALCITE-5549
                 URL: https://issues.apache.org/jira/browse/CALCITE-5549
             Project: Calcite
          Issue Type: Improvement
          Components: avatica, core
            Reporter: TJ Banghart
            Assignee: TJ Banghart


{{MEASURE}} types (introduced in [CALCITE-5105|https://issues.apache.org/jira/browse/CALCITE-5105]) currently present themselves as {{java.sql.Types#OTHER}} ({{1111}})([ref|https://docs.oracle.com/javase/8/docs/api/java/sql/Types.html#OTHER]) It would be advantageous to surface the underlying data type of the {{MEASURE}} rather than catch all {{OTHER}} since the underlying data type is returned in result sets. 

For example a {{MEASURE<INTEGER>}} (a measure of type integer) would appear as {{java.sql.Types#INTEGER}} ({{4}}).

We should also set the {{IS_GENERATEDCOLUMN}} metadata value with this change. All {{MEASURE}} types would populate the column with {{"YES"}} otherwise {{"NO"}}.

[Here's|https://github.com/apache/calcite/blob/2dba40e7a0a5651eac5a30d9e0a72f178bd9bff2/core/src/main/java/org/apache/calcite/jdbc/CalciteMetaImpl.java#L466] where the JDBC type gets set in {{CalciteMetaImpl}}.

For {{IS_GENERATEDCOLUMN}} we will need a change to the {{MetaColumn}} [constructor in Avatica|https://github.com/apache/calcite-avatica/blob/b57eb7cd31a90d3f46b65c13832b398be5b0dad9/core/src/main/java/org/apache/calcite/avatica/MetaImpl.java#L359-L386] that will allow us to set this value.



--
This message was sent by Atlassian Jira
(v8.20.10#820010)