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;;; query.lisp --- Query Support for RDB

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;; RDB Queries based on Q/* and OBJ/QUERY packages.

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;;; Code:

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(in-package :rdb)

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(defclass rdb-query-engine (query-engine rdb-database) ())

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(defclass rdb-execution-context (execution-context) ()

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(:documentation "A context in which RDB queries may be

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executed. DATA-FRAMEs, DATA-SOURCEs, SCHEMAs, and other complex objects are

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stored in the slots of this class and dynamically bound during execution

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phases."))

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(defclass rdb-query-plan (query-plan) ())

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(defclass rdb-query (query) ())