go使用xorm连接oracle查询问题

go在使用xorm连接oracle查询操作的时候遇到了几个问题；

使用的包
“github.com/go-xorm/xorm”
“github.com/mattn/go-oci8”

源码：

package main
import(
	"github.com/go-xorm/xorm"
	_ "github.com/mattn/go-oci8"
)

type Employee_Info struct {
    NAME string
    AGE   int
    PHONE  string
}

func main{
	engine, err := xorm.NewEngine("oci8", "xxxxx@xxxxx:xxx/xxxxx")
	engine.ShowSQL(true) // debug显示SQL
	if err != nil{
		log.Fatal("连接oracle失败,程序退出")
	}
	emp_info := &Employee_Info{}
	if is,_ := engine.GET(emp_info); is {
		fmt.Println(emp_info)
	} else {
		fmt.Println("未查询到结果.")
	}
}

go run main.go 后的结果：

[xorm] [info]  2022/08/08 15:28:25.389151 [SQL] SELECT [n_a_m_e],[a_g_e],[p_h_o_n_e] FROM (SELECT [n_a_m_e],[a_g_e],[p_h_o_n_e] ,ROWNUM RN FROM (SELECT  [n_a_m_e],[a_g_e],[p_h_o_n_e] FROM [employee__info] ) at WHERE ROWNUM <= 1) aat WHERE RN > 0
ORA-00936: missing expression

没有找到结果

1、sql的字段中间都有一个下划线 ？表名中间也多了一个下划线？
原因：在定义struct的时候，字段必须是大写开头后全部都是小写；表名也是如此
修改后：

type Employee_info struct {
    Name string
    Age   int
    Phone  string
}

2、sql的字段都被[]括起来了 ？
在gitHub.com/go-xorm/xorm下的engine.go文件中

...
// Commonly, an application only need one engine
type Engine struct {
	db      *core.DB
	dialect core.Dialect // 注意这里

	ColumnMapper  core.IMapper
	TableMapper   core.IMapper
	TagIdentifier string
	Tables        map[reflect.Type]*core.Table

...
...
// QuoteTo quotes string and writes into the buffer
func (engine *Engine) QuoteTo(buf *strings.Builder, value string) {
	if buf == nil {
		return
	}

	value = strings.TrimSpace(value)
	if value == "" {
		return
	}

	quotePair := engine.dialect.Quote("") // 在这里 dialect 代表的是驱动，即oci8

	if value[0] == '`' || len(quotePair) < 2 || value[0] == quotePair[0] { // no quote
		_, _ = buf.WriteString(value)
		return
	} else {
		prefix, suffix := quotePair[0], quotePair[1]

		_ = buf.WriteByte(prefix)
		for i := 0; i < len(value); i++ {
			if value[i] == '.' {
				_ = buf.WriteByte(suffix)
				_ = buf.WriteByte('.')
				_ = buf.WriteByte(prefix)
			} else {
				_ = buf.WriteByte(value[i])
			}
		}
		_ = buf.WriteByte(suffix)
	}
}

func (engine *Engine) quote(sql string) string {
	return engine.dialect.Quote(sql)
}

查找到 dialect_oracle.go 文件，修改如下：

...
...
func (db *oracle) Quote(name string) string {
	return "[" + name + "]"
}
...
...

修改为：

func (db *oracle) Quote(name string) string {
	return "" + name + ""
}

总体修改为：

package main
import(
	"github.com/go-xorm/xorm"
	_ "github.com/mattn/go-oci8"
)

type Employee_info struct {
    Name string
    Age   int
    Phone  string
}

func main{
	engine, err := xorm.NewEngine("oci8", "xxxxx@xxxxx:xxx/xxxxx")
	engine.ShowSQL(true) // debug显示SQL
	if err != nil{
		log.Fatal("连接oracle失败,程序退出")
	}
	emp_info := &Employee_info{}
	if is,_ := engine.GET(emp_info); is {
		fmt.Println(emp_info)
	} else {
		fmt.Println("未查询到结果.")
	}
}