Cohort Algebra operators - union, minus, intersect

[gowthamrao]

I had built a package called CohortAlgebra that was able to do many of these algebraic operator on instantiated cohorts called CohortAlgebra. It works, but i am hoping that CohortGenerator would take on these. Reason: cohortGenerator has the pipe operations, handles cohort definition set, and can store the SQL in cohortDefinitionSet object.

The operators i would like to ask may be explained by these graphs

Cohort Union

Intersect example 1

Intersect example 2

Intersect example 3

Intersect example 4

Intersect example 5

Minus 1

Minus 2

[anthonysena]

@gowthamrao - is this still a desire for CohortAlgebra? I'm unclear on if are proposing to relocate this logic into CohortGenerator or to provide more capabilities for using CohortAlgebra via CohortGenerator?

[gowthamrao]

I am proposing to integrate the logic from CohortAlgebra to CohortGenerator. CohortAlgebra does the same thing as CohortGenerator i.e. generate new cohort from other cohorts.