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mentat/query-projector
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Grisha Kruglov 055b42af0a Pre: Move db/errors.rs into db_traits
2018-08-08 16:04:38 -07:00
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src Pre: Move db/errors.rs into db_traits 2018-08-08 16:04:38 -07:00
tests Pre: Move core/types.rs into core_traits 2018-08-08 16:04:33 -07:00
Cargo.toml Pre: Move db/errors.rs into db_traits 2018-08-08 16:04:38 -07:00
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.