[teiid-issues] [JBoss JIRA] Resolved: (TEIID-1326) API request: rewrite query/command before it reaches the teiid planner
Steven Hawkins (JIRA)
jira-events at lists.jboss.org
Mon May 2 15:05:18 EDT 2011
[ https://issues.jboss.org/browse/TEIID-1326?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steven Hawkins resolved TEIID-1326.
-----------------------------------
Labels: 7.4CR1 (was: )
Resolution: Done
Added alter statements to allow for the update of view and procedure definitions at runtime. For these updates to be persistent the system must be configured with a org.teiid.metadata.MetadataRepository. The relevant docs will be in the reference and the developers guide.
> API request: rewrite query/command before it reaches the teiid planner
> -----------------------------------------------------------------------
>
> Key: TEIID-1326
> URL: https://issues.jboss.org/browse/TEIID-1326
> Project: Teiid
> Issue Type: Feature Request
> Components: Query Engine
> Affects Versions: 7.1
> Reporter: Mark Addleman
> Assignee: Steven Hawkins
> Labels: 7.4CR1
> Fix For: 7.4
>
>
> I'd like an API to inspect and rewrite a user query/command before it reaches the Teiid planner. The use case is to rewrite the query/command to implement view-like capabilities. For example:
> SELECT a,b,c FROM table1 AS t WHERE t.a='xyz' would be rewritten as:
> SELECT a,b,c FROM (SELECT a,b,c FROM table2 UNION SELECT a,b,c FROM table3) AS t
> I imagine this API would be similar to the translator API: it would receive a data structure representing the query/command and use a visitor to rewrite the query. As a convenience, it would be nice to have something similar to the SQLConversionVisitor.
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