[teiid-issues] [JBoss JIRA] (TEIID-5307) Add views referential_constraints, key_column_usage, table_constraints to information_schema

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-5307?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-5307.
-----------------------------------
    Resolution: Done


Added the views along with the others under the pg_catalog.  While these are general enough that they could be sys, we'll keep them together for now.  There is a potential issue with constraint naming.  Teiid effectively allows constraints to be table/view scoped, rather than schema scoped.  So just referencing a constraint by catalog/schema/name may not be sufficiently unique.  If that is an issue, then we'll need to project an alternative name here that is qualified in some way by the table.

> Add views referential_constraints, key_column_usage, table_constraints to information_schema
> --------------------------------------------------------------------------------------------
>
>                 Key: TEIID-5307
>                 URL: https://issues.jboss.org/browse/TEIID-5307
>             Project: Teiid
>          Issue Type: Enhancement
>          Components: ODBC, Query Engine
>            Reporter: Divyesh Vallabh
>            Assignee: Steven Hawkins
>             Fix For: 10.3
>
>
> Outside of what is reference in npgsql provider, it seems as though PowerBI also references following views to generate schema information 
> Add column in information_schema.columns
> * data_type
> Add support for information_schema.referential_constraints (
> https://www.postgresql.org/docs/current/static/infoschema-referential-constraints.html) to teiid
> Add support for information_schema.key_column_usage (
> https://www.postgresql.org/docs/current/static/infoschema-key-column-usage.html) to teiid
> Add support for information_schema.table_constraints (
> https://www.postgresql.org/docs/current/static/infoschema-table-constraints.html) to teiid



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