import (
	"database/sql"
	"database/sql/driver"
	"go/ast"
	"reflect"
)

// Expression expression interface
type Expression interface {
	Build(builder Builder)
}

// NegationExpressionBuilder negation expression builder
type NegationExpressionBuilder interface {
	NegationBuild(builder Builder)
}

// Expr raw expression
type Expr struct {
	SQL                string
	Vars               []interface{}

	column := "column-name"
	results := []struct {
		Expressions  []clause.Expression
		ExpectedVars []interface{}
		Result       string
	}{{
		Expressions: []clause.Expression{
			clause.Eq{Column: column, Value: "column-value"},
		},
		ExpectedVars: []interface{}{"column-value"},
		Result:       "`column-name` = ?",
	}, {
		Expressions: []clause.Expression{
			clause.Eq{Column: column, Value: nil},

	clause.Name = ""

	if v, ok := clause.Expression.(Limit); ok {
		if (limit.Limit == nil || *limit.Limit == 0) && v.Limit != nil {
			limit.Limit = v.Limit
		}

		if limit.Offset == 0 && v.Offset > 0 {
			limit.Offset = v.Offset
		} else if limit.Offset < 0 {
			limit.Offset = 0
		}
	}

	clause.Expression = limit

							}
						}
					} else {
						fromClause.Joins = append(fromClause.Joins, clause.Join{
							Expression: clause.NamedExpr{SQL: join.Name, Vars: join.Conds},
						})
					}
				} else {
					fromClause.Joins = append(fromClause.Joins, clause.Join{
						Expression: clause.NamedExpr{SQL: join.Name, Vars: join.Conds},
					})
				}
			}

			db.Statement.AddClause(fromClause)

				return
			}
		}

		if clause, ok := tx.Statement.Clauses["SELECT"]; ok {
			clause.Expression = nil
			tx.Statement.Clauses["SELECT"] = clause
		}
	case string:
		if strings.Count(v, "?") >= len(args) && len(args) > 0 {
			tx.Statement.AddClause(clause.Select{
				Distinct:   db.Statement.Distinct,
				Expression: clause.Expr{SQL: v, Vars: args},
			})
		} else if strings.Count(v, "@") > 0 && len(args) > 0 {

	}

	if locking.Options != "" {
		builder.WriteByte(' ')
		builder.WriteString(locking.Options)
	}
}

// MergeClause merge order by clauses
func (locking Locking) MergeClause(clause *Clause) {
	clause.Expression = locking

		queryDB      = tx
		rowsAffected int64
		batch        int
	)

	// user specified offset or limit
	var totalSize int
	if c, ok := tx.Statement.Clauses["LIMIT"]; ok {
		if limit, ok := c.Expression.(clause.Limit); ok {
			if limit.Limit != nil {
				totalSize = *limit.Limit
			}

			if totalSize > 0 && batchSize > totalSize {
				batchSize = totalSize
			}

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	"gorm.io/gorm/logger"
	"gorm.io/gorm/schema"
)

// This regular expression seeks to find a sequence of digits (\d+) among zero or more non-digit characters (\D*),
// with a possible trailing non-digit character (\D?).

// For example, values that can pass this regular expression are:
// - "123"
// - "abc456"
// -"%$#@789"
var regFullDataType = regexp.MustCompile(`\D*(\d+)\D?`)

				Exprs: []clause.Expression{clause.Or(clause.Neq{Column: "name", Value: "jinzhu"}), clause.Eq{Column: clause.PrimaryColumn, Value: "1"}, clause.Gt{Column: "age", Value: 18}},
			}},
			"SELECT * FROM `users` WHERE `users`.`id` = ? OR `name` <> ? AND `age` > ?",
			[]interface{}{"1", "jinzhu", 18},
		},
		{
			[]clause.Interface{clause.Select{}, clause.From{}, clause.Where{

		if !isDryRun {
			return
		}

		ok, mode := hasReturning(db, supportReturning)
		if ok {
			if c, ok := db.Statement.Clauses["ON CONFLICT"]; ok {
				if onConflict, _ := c.Expression.(clause.OnConflict); onConflict.DoNothing {
					mode |= gorm.ScanOnConflictDoNothing
				}
			}

			rows, err := db.Statement.ConnPool.QueryContext(