package main

import (
	"fmt"

	"github.com/xwb1989/sqlparser"
)

func main() {
	sql := "UPDATE orders, inventory SET orders.status = 'Processed', inventory.stock = inventory.stock - orders.quantity WHERE orders.product_id = inventory.product_id AND orders.id = 1 AND inventory.stock >= orders.quantity"

	stmt, err := sqlparser.Parse(sql)
	if err != nil {
		fmt.Println("Parse error: ", err.Error())
		return
	}

	update, ok := stmt.(*sqlparser.Update)
	if !ok {
		fmt.Println("Not an UPDATE statement")
		return
	}

	for _, table := range update.TableExprs {
		switch t := table.(type) {
		case *sqlparser.AliasedTableExpr:
			fmt.Println("Table: ", sqlparser.String(t.Expr))
		}
	}

	for _, expr := range update.Exprs {
		fmt.Printf("Column: %s, New value: %s\n", expr.Name.Name, sqlparser.String(expr.Expr))
	}
}