Ivan Leskin created HAWQ-1605:
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Summary: Support INSERT in PXF JDBC plugin
Key: HAWQ-1605
URL: https://issues.apache.org/jira/browse/HAWQ-1605
Project: Apache HAWQ
Issue Type: Improvement
Components: PXF
Reporter: Ivan Leskin
Assignee: Ed Espino
Add support of INSERT queries in PXF JDBC plugin:
* Implement `WriteAccessor` and `WriteResolver` interfaces. Both are
implemented in the same classes as `ReadAccessor` and `ReadResolver`;
* Support query batching in Accessor. The size of a batch is defined by user
and may be "infinite";
* In Accessor, use `java.sql.PreparedStatement` and built-in functions in it
to process queries;
* In `setFields()` method of Resolver, perform type conversions of the data
tuples received from PXF.
Optimize and refactor the code in PXF JDBC plugin, make some fixes:
* Make functions for building WHERE statements static where possible to reduce
the number of InputData checks;
* Organize imports;
* Check the codestyle;
* Fix the handling of TIMESTAMP values when performing SELECT requests.
Improve documentation:
* Correct or rewrite Javadoc strings for plugin functions;
* Rewrite README.md.
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