switch to mysql driver, separate pgx logic, handle no-change migration

db/mysql.go

@@ -0,0 +1,31 @@
+package db
+
+import (
+	"database/sql"
+	"log/slog"
+	"time"
+
+	_ "github.com/go-sql-driver/mysql"
+)
+
+const maxOpenDbConn = 10
+const maxIdleDbConn = 5
+const maxDbLifetime = time.Minute * 5
+
+func NewMySQL(dataSource string) (*sql.DB, error) {
+	d, err := sql.Open("mysql", dataSource)
+	if err != nil {
+		slog.Error("error connecting to database", "error", err)
+	}
+
+	d.SetMaxOpenConns(maxOpenDbConn)
+	d.SetMaxIdleConns(maxIdleDbConn)
+	d.SetConnMaxLifetime(maxDbLifetime)
+
+	if err := d.Ping(); err != nil {
+		slog.Error("error pinging database", "error", err)
+		return nil, err
+	}
+
+	return d, nil
+}

db/pgx.go

@@ -2,14 +2,11 @@ package db
 
 import (
 	"context"
-	"database/sql"
-	"log/slog"
-	"time"
-
 	_ "github.com/jackc/pgconn"
 	_ "github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgxpool"
 	_ "github.com/jackc/pgx/v5/stdlib"
+	"log/slog"
 )
 
 func NewPGXPool(dataSource string) *pgxpool.Pool {
@@ -27,25 +24,3 @@ func NewPGXPool(dataSource string) *pgxpool.Pool {
 	slog.Info("connected to database")
 	return dbPool
 }
-
-const maxOpenDbConn = 10
-const maxIdleDbConn = 5
-const maxDbLifetime = time.Minute * 5
-
-func NewMySQL(dataSource string) (*sql.DB, error) {
-	d, err := sql.Open("mysql", dataSource)
-	if err != nil {
-		slog.Error("error connecting to database", "error", err)
-	}
-
-	d.SetMaxOpenConns(maxOpenDbConn)
-	d.SetMaxIdleConns(maxIdleDbConn)
-	d.SetConnMaxLifetime(maxDbLifetime)
-
-	if err := d.Ping(); err != nil {
-		slog.Error("error pinging database", "error", err)
-		return nil, err
-	}
-
-	return d, nil
-}