Merge pull request 'sql解析库可以解析update语句中的要改变的字段，可通过字段改变后的字段进行一个判断，来决定要不要继续往下执行' (#1) from dev into master

Reviewed-on: https://vcs.feat.run/shaojiacheng/sql_prase_demo/pulls/1

go.mod

@@ -0,0 +1,5 @@
+module sql_prase_demo
+
+go 1.20
+
+require github.com/xwb1989/sqlparser v0.0.0-20180606152119-120387863bf2

go.sum

@@ -0,0 +1,2 @@
+github.com/xwb1989/sqlparser v0.0.0-20180606152119-120387863bf2 h1:zzrxE1FKn5ryBNl9eKOeqQ58Y/Qpo3Q9QNxKHX5uzzQ=
+github.com/xwb1989/sqlparser v0.0.0-20180606152119-120387863bf2/go.mod h1:hzfGeIUDq/j97IG+FhNqkowIyEcD88LrW6fyU3K3WqY=

main.go

@@ -0,0 +1,34 @@
+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))
+	}
+}