feat(database): implement sql adapter for backwards compatibility

backend/v3/storage/database/dialect/sql/conn.go

@@ -0,0 +1,59 @@
+package sql
+
+import (
+	"context"
+	"database/sql"
+
+	"github.com/zitadel/zitadel/backend/v3/storage/database"
+)
+
+type sqlConn struct {
+	*sql.Conn
+}
+
+var _ database.Client = (*sqlConn)(nil)
+
+// Release implements [database.Client].
+func (c *sqlConn) Release(_ context.Context) error {
+	return c.Close()
+}
+
+// Begin implements [database.Client].
+func (c *sqlConn) Begin(ctx context.Context, opts *database.TransactionOptions) (database.Transaction, error) {
+	tx, err := c.BeginTx(ctx, transactionOptionsToSQL(opts))
+	if err != nil {
+		return nil, wrapError(err)
+	}
+	return &sqlTx{tx}, nil
+}
+
+// Query implements sql.Client.
+// Subtle: this method shadows the method (*Conn).Query of pgxConn.Conn.
+func (c *sqlConn) Query(ctx context.Context, sql string, args ...any) (database.Rows, error) {
+	rows, err := c.QueryContext(ctx, sql, args...)
+	if err != nil {
+		return nil, wrapError(err)
+	}
+	return &Rows{rows}, nil
+}
+
+// QueryRow implements sql.Client.
+// Subtle: this method shadows the method (*Conn).QueryRow of pgxConn.Conn.
+func (c *sqlConn) QueryRow(ctx context.Context, sql string, args ...any) database.Row {
+	return &Row{c.QueryRowContext(ctx, sql, args...)}
+}
+
+// Exec implements [database.Pool].
+// Subtle: this method shadows the method (Pool).Exec of pgxPool.Pool.
+func (c *sqlConn) Exec(ctx context.Context, sql string, args ...any) (int64, error) {
+	res, err := c.ExecContext(ctx, sql, args...)
+	if err != nil {
+		return 0, wrapError(err)
+	}
+	return res.RowsAffected()
+}
+
+// Migrate implements [database.Migrator].
+func (c *sqlConn) Migrate(ctx context.Context) error {
+	return ErrMigrate
+}