groovy:合計報價單明細金額與數量

groovy:合計報價單明細金額與數量
Model Validator Table Event
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import groovy.sql.Sql
import java.sql.Timestamp
import java.sql.PreparedStatement
import java.sql.ResultSet
import org.compiere.util.Env
import org.compiere.util.DB
//  A_Ctx   A_PO  A_Type  A_Event

int client=Env.getContextAsInt(A_Ctx, "AD_Client_ID");
int org=Env.getContextAsInt(A_Ctx, "AD_Org_ID");
int uid=Env.getContextAsInt(A_Ctx, "#AD_User_ID");
//  int parent_id=Env.getContextAsInt(A_Ctx, "報價單_ID");
int parent_id=((Integer)A_PO.get_Value("報價單_ID")).intValue();

String sql = "SELECT SUM(金額),SUM(數量) FROM 報價單明細 WHERE 報價單_id =? ";
PreparedStatement pstmt = DB.prepareStatement(sql, A_PO.get_TrxName());
pstmt.setInt(1, parent_id);
ResultSet rs = pstmt.executeQuery();
while (rs.next()) {
BigDecimal price = rs.getBigDecimal (1);
BigDecimal qty = rs.getBigDecimal (2);
if (price==null)  price = new BigDecimal(0);
if (qty==null)  qty = new BigDecimal(0);
DB.executeUpdateEx("UPDATE 報價單 SET 報價金額="+price+" , 總數量="+qty+" , 稅額="+price+" *營業稅率/100, 合計="+price+" * (1 + 營業稅率/100) WHERE 報價單_id ="+parent_id,  A_PO.get_TrxName());
}
rs.close();
pstmt.close();

result=""