3. Query processing steps query execution plan (QEP): to Sedna executor operation tree Physical Plan Generator Optimizing Rewriter Static Analyzer Parser XML update statement Data Definition Language statement XQuery query
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6. Optimizing rewriter step Physical Plan Generator Optimizing Rewriter query execution plan Static Analyzer Parser operation tree XML update statement Data Definition Language statement XQuery query
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15. Physical plan generation step Physical Plan Generator Optimizing Rewriter query execution plan Static Analyzer Parser operation tree XML update statement Data Definition Language statement XQuery query