relpipe-tr-sql and relpipe-in-sql --list-data-sources option has boolean parameter since v0.18
%rec: tables
table_schema: pg_catalog
table_name: pg_type
table_type: BASE TABLE
table_schema: pg_catalog
table_name: pg_roles
table_type: VIEW
table_schema: pg_catalog
table_name: pg_group
table_type: VIEW
%rec: types
%type: typbyval bool
typname: bool
typcategory: B
typbyval: true
typname: bytea
typcategory: U
typbyval: false
typname: char
typcategory: S
typbyval: true
typname: name
typcategory: S
typbyval: false