postgresql: Generate all functions in pg_catalog (#550)

For now, generate this is a different file

Author: kyleconroy

Makefile

@@ -7,5 +7,8 @@ test:
 sqlc-dev:
 	go build -o ~/bin/sqlc-dev ./cmd/sqlc/
 
+sqlc-pg-gen:
+	go build -o ~/bin/sqlc-pg-gen ./internal/tools/sqlc-pg-gen
+
 regen: sqlc-dev
 	./scripts/regenerate.sh

go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/davecgh/go-spew v1.1.1
 	github.com/go-sql-driver/mysql v1.5.0
 	github.com/google/go-cmp v0.4.0
+	github.com/jackc/pgx/v4 v4.6.0
 	github.com/jinzhu/inflection v1.0.0
 	github.com/lfittl/pg_query_go v1.0.0
 	github.com/lib/pq v1.4.0

go.sum

@@ -65,7 +65,7 @@ func postgresType(r *compiler.Result, col *compiler.Column, settings config.Comb
 		}
 		return "sql.NullString"
 
-	case "bool", "pg_catalog.bool":
+	case "boolean", "bool", "pg_catalog.bool":
 		if notNull {
 			return "bool"
 		}