fix: example is broken, this fixes it

example/db/query.postgres.sql

@@ -58,7 +58,7 @@ VALUES ($1, $2);
 -- INSERT INTO book_tags ("book_id", "tag_id") VALUES (unnest($1::bigint[]), unnest($2::bigint[]))
 -- @bulk-for AddBookTag
 INSERT INTO book_tags ("book_id", "tag_id")
-VALUES (unnest($1::bigint[]), unnest($2::bigint[]));
+VALUES (unnest(sqlc.arg(book_ids)::bigint[]), unnest(sqlc.arg(tag_ids)::bigint[]));
 
 -- name: GetBookTags :many
 -- SELECT t."id", t."name", t."created_at", t."updated_at" FROM tags t INNER JOIN book_tags bt ON t.id = bt.tag_id WHERE bt.book_id = $1

example/go.mod

@@ -1,12 +1,13 @@
 module github.com/kalbasit/sqlc-multi-db/example
 
-go 1.25.5
+go 1.25.7
 
 tool github.com/kalbasit/sqlc-multi-db
 
 require (
 	github.com/go-sql-driver/mysql v1.9.2
 	github.com/jackc/pgx/v5 v5.7.4
+	github.com/lib/pq v1.12.0
 	github.com/mattn/go-sqlite3 v1.14.28
 )
 

example/go.sum

@@ -23,6 +23,8 @@ github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/lib/pq v1.12.0 h1:mC1zeiNamwKBecjHarAr26c/+d8V5w/u4J0I/yASbJo=
+github.com/lib/pq v1.12.0/go.mod h1:/p+8NSbOcwzAEI7wiMXFlgydTwcgTr3OSKMsD2BitpA=
 github.com/mattn/go-sqlite3 v1.14.28 h1:ThEiQrnbtumT+QMknw63Befp/ce/nUPgBPMlRFEum7A=
 github.com/mattn/go-sqlite3 v1.14.28/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=

example/pkg/database/database.go

@@ -1,3 +1,4 @@
+//go:generate go tool sqlc-multi-db --engine sqlite:sqlitedb --engine postgres:postgresdb --engine mysql:mysqldb postgresdb/querier.go
 package database
 
 import (
@@ -16,34 +17,41 @@ import (
 )
 
 // Open opens a database connection and returns a Querier.
-// URL schemes: sqlite:/, postgresql://, mysql://
+// URL schemes: sqlite:/, postgresql://, mysql://.
 func Open(ctx context.Context, dbURL string) (Querier, error) {
 	switch {
 	case strings.HasPrefix(dbURL, "sqlite:"):
 		path := strings.TrimPrefix(dbURL, "sqlite:")
+
 		sdb, err := sql.Open("sqlite3", path)
 		if err != nil {
 			return nil, fmt.Errorf("opening sqlite: %w", err)
 		}
+
 		sdb.SetMaxOpenConns(1)
+
 		if _, err := sdb.ExecContext(ctx, "PRAGMA foreign_keys = ON"); err != nil {
 			return nil, fmt.Errorf("enabling foreign keys: %w", err)
 		}
+
 		return &sqliteWrapper{adapter: sqlitedb.NewAdapter(sdb)}, nil
 
 	case strings.HasPrefix(dbURL, "postgres://"), strings.HasPrefix(dbURL, "postgresql://"):
 		sdb, err := sql.Open("pgx", dbURL)
 		if err != nil {
 			return nil, fmt.Errorf("opening postgres: %w", err)
 		}
+
 		return &postgresWrapper{adapter: postgresdb.NewAdapter(sdb)}, nil
 
 	case strings.HasPrefix(dbURL, "mysql://"):
 		dsn := strings.TrimPrefix(dbURL, "mysql://")
+
 		sdb, err := sql.Open("mysql", dsn)
 		if err != nil {
 			return nil, fmt.Errorf("opening mysql: %w", err)
 		}
+
 		return &mysqlWrapper{adapter: mysqldb.NewAdapter(sdb)}, nil
 
 	default: