Amareshwari Sriramadasu created LENS-440:
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Summary: ColumnarSQLRewriter.rewrite should not be synchronized
Key: LENS-440
URL: https://issues.apache.org/jira/browse/LENS-440
Project: Apache Lens
Issue Type: Improvement
Components: driver-jdbc
Affects Versions: 2.0
Reporter: Amareshwari Sriramadasu
Fix For: 2.1
Right now, ColumnarSQLRewriter.rewrite is synchronized because rewriter is
cached in JDBCDriver and it uses all class level variables to keep query
rewriting state.
Having this synchronized will make other queries wait for rewrite. We should
have separate rewriter created for each query or move the state out of
ColumnarSQLRewriter sothat it need not be synchronized.
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