如何修复错误mssql:将数据类型decimal转换为nvarchar时出错。使用Go-MSSQLSDB进入Go
我很难理解为什么在使用go MSSQLSDB驱动程序时无法使用我定义的参数执行存储过程。如果有人能指出我在定义作为参数传递的值时出错的地方,这将导致从microsoft sql server数据库“mssql:error converting data type decimal to nvarchar”(mssql:error converting data type decimal to nvarchar)接收到错误。在使用Go MSSQLSDB的Go中,我们将不胜感激 我在下面的存储过程中包含了我正在使用的代码,甚至包括参数定义 Go代码:如何修复错误mssql:将数据类型decimal转换为nvarchar时出错。使用Go-MSSQLSDB进入Go,sql,sql-server,go,Sql,Sql Server,Go,我很难理解为什么在使用go MSSQLSDB驱动程序时无法使用我定义的参数执行存储过程。如果有人能指出我在定义作为参数传递的值时出错的地方,这将导致从microsoft sql server数据库“mssql:error converting data type decimal to nvarchar”(mssql:error converting data type decimal to nvarchar)接收到错误。在使用Go MSSQLSDB的Go中,我们将不胜感激 我在下面的存储过程中包
package main
import (
"context"
"database/sql"
"flag"
"fmt"
_ "github.com/denisenkom/go-mssqldb"
"github.com/shopspring/decimal"
"log"
)
var (
debug = flag.Bool("debug", true, "enable debugging")
userid = flag.String("U", "user", "the database user")
password = flag.String("P", "password", "the database password")
server = flag.String("S", "address", "the database server")
port *int = flag.Int("port", 1433, "the database port")
database = flag.String("d", "database", "the database")
encrypt = flag.String("e", "disable", "the encryption flag")
)
func main() {
flag.Parse()
if *debug {
fmt.Printf(" port:%d\n", *port)
fmt.Printf(" server:%s\n", *server)
fmt.Printf(" user:%s\n", *userid)
fmt.Printf(" database:%s\n", *database)
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
connString := fmt.Sprintf("server=%s;port=%d;user id=%s;password=%s;database=%s;encrypt=%s;", *server, *port, *userid, *password, *database, *encrypt)
if *debug {
fmt.Printf(" connString:%s\n", connString)
}
db, err := sql.Open("sqlserver", connString)
if err != nil {
log.Fatal("Open connection failed:", err.Error())
}
defer db.Close()
// bigint
WarehouseID := 1
// nvarchar(7)
TaxCode := "Vertex"
// nvarchar(max)
LineItemTotals := "16.35"
// decimal(19,5)
TotalTax, _ := decimal.NewFromString("00.00")
// nvarchar(50)
ShipToAddress1 := "Address1"
// nvarchar(50)
ShipToAddress2 := "Address2"
// nvarchar(40)
ShipToCity := "Seattle"
// nvarchar(5)
ShipToState := "WA"
// nvarchar(10)
ShipToZip := "zip"
// nchar(3)
ISOCountryCode := "USA"
// decimal(19,5)
FreightCharge, _ := decimal.NewFromString("12.10")
// bigInt
CustomerID := 456118
// bigint
Timeout := 5000
rows, err := db.QueryContext(ctx, "EAPI_CalculateTax",
sql.Named("WarehouseID", WarehouseID),
sql.Named("TaxCode", TaxCode),
sql.Named("LineItemTotals", LineItemTotals),
sql.Named("ShipToAddress1", ShipToAddress1),
sql.Named("ShipToAddress2", ShipToAddress2),
sql.Named("ShipToCity", ShipToCity),
sql.Named("ShipToState", ShipToState),
sql.Named("ShipToZip", ShipToZip),
sql.Named("ISOCountryCode", ISOCountryCode),
sql.Named("FreightCharge", FreightCharge),
sql.Named("CustomerID", CustomerID),
sql.Named("Timeout", Timeout),
sql.Named("TotalTax", sql.Out{Dest: &TotalTax}),
)
if err != nil {
log.Fatal("Prepare failed: ", err.Error())
}
defer rows.Close()
var strrow string
for rows.Next() {
err = rows.Scan(&strrow)
}
fmt.Printf("TotalTax is %d", TotalTax)
}
sql存储过程参数:
@WarehouseID bigint,
@TaxCode nvarchar(7),
@LineItemTotals nvarchar(max),
@TotalTax decimal(19,5) OUTPUT,
@ShipToAddress1 nvarchar(50) = '',
@ShipToAddress2 nvarchar(50) = '',
@ShipToCity nvarchar(40) = '',
@ShipToState nvarchar(5) = '',
@ShipToZip nvarchar(10) = '',
@ISOCountryCode nchar(3) = 'USA',
@FreightCharge decimal(19,5) = 0,
@CustomerID bigInt = 0,
@Timeout bigint = 0
编辑:
我在errorx库中添加了一个,并获得了更好的堆栈跟踪。堆栈跟踪如下所示:
mssql: Error converting data type decimal to nvarchar.
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x0 pc=0x4cd337]
goroutine 1 [running]:
database/sql.(*Rows).Next(0x0, 0xc0000468a0)
C:/Go/src/database/sql/sql.go:2640 +0x37
main.main()
C:/Users/chris/go/src/RAPI/main.go:99 +0xc18
检查这是否是订单问题
意思:尝试使用
sql.Named()调用db.QueryContext(ctx,
)
参数的列出顺序与sql存储过程参数的定义顺序相同。同时检查十进制精度是否存在问题。我现在就试试!待机!我尝试了你说的操作,但没有任何更改。我还包括了errorx库,并编辑了我的问题以包括堆栈跟踪。它不喜欢行下一个语句,似乎返回nil?还是我对TotalTax参数的引用错误?