The linked code is actually just for the variables in psql (the commandline tool). For the code parsing input to the SQL-level bool datatype, it's https://gith

The linked code is actually just for the variables in psql (the commandline tool). For the code parsing input to the SQL-level bool datatype, it's https://github.com/postgres/postgres/blob/master/src/backend/utils/adt/bool.c#L126 https://github.com/postgres/postgres/blob/master/src/backend... which uses https://github.com/postgres/postgres/blob/master/src/backend/utils/adt/bool.c#L36 https://github.com/postgres/postgres/blob/master/src/backend...