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# Adaptive query optimization
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# AQO
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Adaptive query optimization is the extension of standard PostgreSQL cost-based
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query optimizer. Its basic principle is to use query execution statistics
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for improving cardinality estimation. Experimental evaluation shows that this
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improvement sometimes provides an enormously large speed-up for rather
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complicated queries.
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AQO (Adaptive Query Optimization) is an extension of PostgreSQL cost-based query optimizer. Its basic principle is to use query execution statistics for improving cardinality estimation. Experimental evaluation shows that this improvement sometimes provides an enormously large speed-up for rather complicated queries.
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## Installation
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