Module merge 

MERGE clause scopes, target privileges, and positional RETURNING schemas.

Functions

ensure_merge_mutation_privileges

expanded_merge_returning_projections

merge_command_returning_schema

merge_returning_schema

merge_returning_source_schema

merge_target_columns

The columns a MERGE supplies, as PostgreSQL records them in its target’s insertedCols and updatedCols: those each INSERT action fills and those each UPDATE action sets.

validate_merge_action_scopes

validate_merge_target_columns