Module polar_core::filter

Structs

• Condition
  A constraint that must hold for a record in the data source.
• Filter
  Represents an abstract filter over a data source.
• Projection
  An abstract “field reference” on a record from a named data source.
• Relation
  A named logical extension of a data set. Corresponds to a “join” in relational algebra, but we leave out the details about columns (the host knows how to do it).

Enums

• Comparison
  The comparison operation applied by a Condition.
• Datum
  The left or right side of a Condition.

Functions

• singleton