intersectCohorts {CohortAlgebra}

Intersect cohort(s)

Description

Find the common cohort period for persons present in all the cohorts. Note: if subject is not found in any of the cohorts, then they will not be in the final cohort.

Usage

intersectCohorts(
  connectionDetails = NULL,
  connection = NULL,
  sourceCohortDatabaseSchema = NULL,
  sourceCohortTable,
  targetCohortDatabaseSchema = NULL,
  targetCohortTable,
  cohortIds,
  newCohortId,
  purgeConflicts = FALSE,
  tempEmulationSchema = getOption("sqlRenderTempEmulationSchema")
)

Arguments

connectionDetails

An object of type connectionDetails as created using the createConnectionDetails function in the DatabaseConnector package. Can be left NULL if connection is provided.

connection

An object of type connection as created using the connect function in the DatabaseConnector package. Can be left NULL if connectionDetails is provided, in which case a new connection will be opened at the start of the function, and closed when the function finishes.

sourceCohortDatabaseSchema

Schema name where your source cohort tables reside. Note that for SQL Server, this should include both the database and schema name, for example 'scratch.dbo'.

sourceCohortTable

The name of the source cohort table.

targetCohortDatabaseSchema

Schema name where your target cohort tables reside. Note that for SQL Server, this should include both the database and schema name, for example 'scratch.dbo'.

targetCohortTable

The name of the target cohort table.

cohortIds

A vector of one or more Cohort Ids.

newCohortId

The cohort id of the output cohort.

purgeConflicts

If there are conflicts in the target cohort table i.e. the target cohort table already has records with newCohortId, do you want to purge and replace them with transformed. By default - it will not be replaced, and an error message is thrown.

tempEmulationSchema

Some database platforms like Oracle and Impala do not truly support temp tables. To emulate temp tables, provide a schema with write privileges where temp tables can be created.

Value

Nothing is returned