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Parallel Processing]]>1<![CDATA[Orca Architecture]]>1<![CDATA[Preliminaries]]>1<![CDATA[SQL on Hadoop]]>1<![CDATA[Query Optimization]]>2<![CDATA[Optimization Workflow]]>3<![CDATA[Parallel Query Optimization]]>5<![CDATA[Metadata Exchange]]>6<![CDATA[Minimal Repros]]>6<![CDATA[Verifiability]]>6<![CDATA[Experiments]]>7<![CDATA[Testing Optimizer Accuracy]]>7<![CDATA[Experiment Setup]]>8<![CDATA[MPP Databases]]>8<![CDATA[Performance]]>8<![CDATA[SQL on Hadoop]]>8<![CDATA[TPC-DS Benchmark]]>8<![CDATA[Performance]]>9<![CDATA[Query Optimization Foundations]]>10<![CDATA[Related Work]]>10<![CDATA[SQL On Hadoop]]>10<![CDATA[SQL Optimization On MPP Databases]]>10<![CDATA[References]]>11<![CDATA[Summary]]>11