defer close(cacheStmt.prepared)

	// Reason why cannot lock conn.PrepareContext
	// suppose the maxopen is 1, g1 is creating record and g2 is querying record.
	// 1. g1 begin tx, g1 is requeue because of waiting for the system call, now `db.ConnPool` db.numOpen == 1.
	// 2. g2 select lock `conn.PrepareContext(ctx, query)`, now db.numOpen == db.maxOpen , wait for release.

	"runtime"
	"strconv"
	"strings"
	"unicode"
)

var gormSourceDir string

func init() {
	_, file, _, _ := runtime.Caller(0)
	// compatible solution to get gorm source directory with various operating systems
	gormSourceDir = sourceDir(file)
}

func sourceDir(file string) string {
	dir := filepath.Dir(file)
	dir = filepath.Dir(dir)

	s := filepath.Dir(dir)
	if filepath.Base(s) != "gorm.io" {
		s = dir
	}

func (ct ColumnType) Name() string {
	if ct.NameValue.Valid {
		return ct.NameValue.String
	}
	return ct.SQLColumnType.Name()
}

// DatabaseTypeName returns the database system name of the column type. If an empty
// string is returned, then the driver type name is not supported.
// Consult your driver documentation for a list of driver data types. Length specifiers
// are not included.