func FindCol(cols []*model.ColumnMeta, name string) *model.ColumnMeta {
	for _, col := range cols {
		if strings.EqualFold(col.ColumnMeta.Name, name) {
			return col
		}
	}
	return nil
}
FindCol finds column in cols by name.
package table
import (
	"strings"
	"github.com/pingcap/parser/mysql"
	"github.com/pingcap/tidb/types"
	"github.com/pingcap/tidb/util/hack"
	"github.com/zhihu/zetta/pkg/model"
)
type Column struct {
	*model.ColumnMeta
}
func (c *Column) String() string {
	return ""
}