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mentat/query-projector
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Richard Newman df90c366af
Partial work from simple aggregates work (#497) r=nalexander 
* Pre: make FindQuery, FindSpec, and Element non-Clone.
* Pre: make query translator return a Result.
* Pre: make projection return a Result.
* Pre: refactor query parser in preparation for parsing aggregates.
* Pre: rename PredicateFn -> QueryFunction.
* Pre: expose more about bound variables from CC.
* Pre: move ValueTypeSet to core.
2017-11-30 15:02:07 -08:00
..
src Partial work from simple aggregates work (#497) r=nalexander 2017-11-30 15:02:07 -08:00
Cargo.toml Update some dependencies. (#492) r=etoop 2017-11-21 16:24:08 +00:00
README.md Implement projection and querying. (#353) r=nalexander 2017-03-06 14:40:10 -08:00

README.md

This module handles the derivation from an algebrized query of two things:

  • A SQL projection: a mapping from columns mentioned in the body of the query to columns in the output.
  • A Datalog projection: a function that consumes rows of the appropriate shape (as defined by the SQL projection) to yield one of the four kinds of Datalog query result.

These two must naturally coordinate, and so they are both produced here.