List the concept classes available on each server

Returns the distinct concept classes from the OMOP concept_class table on each connected server (falling back to distinct concept_class_id values on concept when the concept_class table is not loaded). Vocabulary reference data carries no patient information, so this reader is not disclosure-gated and the per-site frames are pooled by set union.

Usage

ds.omop.vocab.classes(symbol = "omop", conns = NULL, execute = TRUE)

Arguments

symbol

Character; the session symbol used when the OMOP connection was initialised (default: "omop").

conns

DSI connection object(s). If NULL (the default), the connections stored in the active session are used.

execute

Logical; if FALSE, returns a dry-run dsomop_result containing only the reproducible R code without contacting the servers.

Value

A dsomop_result. per_site holds each server's concept class frame; pooled is the de-duplicated union across servers.

Examples

if (FALSE) { # \dontrun{
classes <- ds.omop.vocab.classes()
classes$pooled
} # }