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From "Thomas Mueller (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (OAK-28) Query implementation
Date Thu, 22 Mar 2012 08:48:22 GMT

     [ https://issues.apache.org/jira/browse/OAK-28?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Thomas Mueller updated OAK-28:
------------------------------

    Description: 
A query engine needs to be implemented. 

A query parser in oak-core should be able to handle xpath, sql2 and optionally other query
languages. The jcr component must generate a valid query in one of those languages from JQOM
queries and pass that statement along with value bindings, limit, offset, and name space mappings
to the oak-core. 

We need to:
* Define the oak-core API for handling queries. How are do we handle name space mappings,
limit and offset
* Implement a query builder in the jcr component which takes care of translating JQOM queries
to statements in string form 
* Implement a query parser in oak-core and decide on a versatile AST representation which
works with all query languages and which is extensible to future query languages.
* Implement the actual query execution engine which interprets the query AST




  was:
A query engine needs to be implemented. 

A query parser in oak-core should be able to handle xpath, sql2 and optionally other query
languages. The jcr component must generate a valid query in one of those languages from JQOM
queries and pass that statement along with name space mappings to the oak-core. 

We need to:
* Define the oak-core API for handling queries. How are do we handle name space mappings,
limit and size
* Implement a query builder in the jcr component which takes care of translating JQOM queries

* Implement a query parser in oak-core and decide on a versatile AST representation which
works with all query languages and which is extensible to future query languages.
* Implement the actual query execution engine which interprets the query AST




    
> Query implementation
> --------------------
>
>                 Key: OAK-28
>                 URL: https://issues.apache.org/jira/browse/OAK-28
>             Project: Jackrabbit Oak
>          Issue Type: New Feature
>          Components: core, jcr
>            Reporter: Thomas Mueller
>            Assignee: Thomas Mueller
>              Labels: query
>         Attachments: OakToJcrQueryTreeConverter.java
>
>
> A query engine needs to be implemented. 
> A query parser in oak-core should be able to handle xpath, sql2 and optionally other
query languages. The jcr component must generate a valid query in one of those languages from
JQOM queries and pass that statement along with value bindings, limit, offset, and name space
mappings to the oak-core. 
> We need to:
> * Define the oak-core API for handling queries. How are do we handle name space mappings,
limit and offset
> * Implement a query builder in the jcr component which takes care of translating JQOM
queries to statements in string form 
> * Implement a query parser in oak-core and decide on a versatile AST representation which
works with all query languages and which is extensible to future query languages.
> * Implement the actual query execution engine which interprets the query AST

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