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driver.go
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driver.go
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package go_ora
import (
"database/sql"
"database/sql/driver"
"errors"
"fmt"
"github.com/sijms/go-ora/v2/advanced_nego"
"github.com/sijms/go-ora/v2/configurations"
"reflect"
"strings"
"sync"
"github.com/sijms/go-ora/v2/converters"
)
type OracleDriver struct {
dataCollected bool
cusTyp map[string]customType
sessionParam map[string]string
mu sync.Mutex
sStrConv converters.IStringConverter
nStrConv converters.IStringConverter
UserId string
connOption *configurations.ConnectionConfig
//Server string
//Port int
//Instance string
//Service string
//DBName string
//SessionId int
//SerialNum int
}
var oracleDriver = &OracleDriver{
cusTyp: map[string]customType{},
sessionParam: map[string]string{},
}
type GetDriverInterface interface {
Driver() driver.Driver
}
func init() {
sql.Register("oracle", oracleDriver)
}
func GetDefaultDriver() *OracleDriver {
return oracleDriver
}
func NewDriver() *OracleDriver {
return &OracleDriver{
cusTyp: map[string]customType{},
sessionParam: map[string]string{},
}
}
func (driver *OracleDriver) init(conn *Connection) error {
driver.mu.Lock()
defer driver.mu.Unlock()
if !driver.dataCollected {
driver.UserId = conn.connOption.UserID
if driver.sStrConv == nil {
driver.sStrConv = conn.sStrConv.Clone()
}
if driver.nStrConv == nil {
driver.nStrConv = conn.nStrConv.Clone()
}
if driver.connOption == nil {
driver.connOption = new(configurations.ConnectionConfig)
*driver.connOption = *conn.connOption
}
driver.dataCollected = true
}
// update session parameters
var err error
for key, value := range driver.sessionParam {
_, err = conn.Exec(fmt.Sprintf("alter session set %s=%s", key, value))
if err != nil {
return err
}
}
return err
}
// SetStringConverter this function is used to set a custom string converter interface
// that will be used to encode and decode strings and bytearrays
// passing nil will use driver string converter for supported langs
func SetStringConverter(db GetDriverInterface, charset, nCharset converters.IStringConverter) {
if driver, ok := db.Driver().(*OracleDriver); ok {
driver.sStrConv = charset
driver.nStrConv = nCharset
}
}
func DelSessionParam(db *sql.DB, key string) {
if drv, ok := db.Driver().(*OracleDriver); ok {
drv.mu.Lock()
defer drv.mu.Unlock()
delete(drv.sessionParam, key)
}
}
func AddSessionParam(db *sql.DB, key, value string) error {
_, err := db.Exec(fmt.Sprintf("alter session set %s=%s", key, value))
if err != nil {
return err
}
if drv, ok := db.Driver().(*OracleDriver); ok {
drv.mu.Lock()
defer drv.mu.Unlock()
drv.sessionParam[key] = value
}
return nil
}
//func RegisterRegularTypeArray(conn *sql.DB, regularTypeName, arrayTypeName string, itemMaxSize int) error {
// err := conn.Ping()
// if err != nil {
// return err
// }
//
// if drv, ok := conn.Driver().(*OracleDriver); ok {
// return RegisterRegularTypeArrayWithOwner(conn, drv.UserId, regularTypeName, arrayTypeName, itemMaxSize)
// }
// return errors.New("the driver used is not a go-ora driver type")
//}
//func RegisterRegularTypeArrayWithOwner(conn *sql.DB, owner, regularTypeName, arrayTypeName string, itemMaxSize int) error {
// drv := conn.Driver().(*OracleDriver)
// regularTypeName = strings.TrimSpace(regularTypeName)
// arrayTypeName = strings.TrimSpace(arrayTypeName)
// if len(regularTypeName) == 0 {
// return errors.New("typeName shouldn't be empty")
// }
// if len(arrayTypeName) == 0 {
// return errors.New("array type name shouldn't be empty")
// }
// cust := customType{
// owner: owner,
// name: regularTypeName,
// arrayTypeName: arrayTypeName,
// isArray: true,
// }
// var err error
// cust.arrayTOID, err = getTOID2(conn, owner, arrayTypeName)
// if err != nil {
// return err
// }
// param := ParameterInfo{Direction: Input, Flag: 3, TypeName: regularTypeName, MaxLen: 1, MaxCharLen: 1}
// switch strings.ToUpper(regularTypeName) {
// case "NUMBER":
// param.DataType = NUMBER
// case "VARCHAR2":
// param.DataType = NCHAR
// param.CharsetForm = 1
// param.ContFlag = 16
// param.CharsetID = drv.sStrConv.GetLangID()
// case "NVARCHAR2":
// param.DataType = NCHAR
// param.CharsetForm = 2
// param.ContFlag = 16
// param.CharsetID = drv.nStrConv.GetLangID()
// case "TIMESTAMP":
// param.DataType = TimeStampDTY
// case "DATE":
// param.DataType = DATE
// case "TIMESTAMP WITH LOCAL TIME ZONE":
// param.DataType = TimeStampLTZ_DTY
// //case "TIMESTAMP WITH TIME ZONE":
// // param.DataType = TimeStampTZ_DTY
// // param.MaxLen = converters.MAX_LEN_TIMESTAMP
// case "RAW":
// param.DataType = RAW
// case "BLOB":
// param.DataType = OCIBlobLocator
// case "CLOB":
// param.DataType = OCIClobLocator
// param.CharsetForm = 1
// param.ContFlag = 16
// param.CharsetID = drv.sStrConv.GetLangID()
// case "NCLOB":
// param.DataType = OCIClobLocator
// param.CharsetForm = 2
// param.ContFlag = 16
// param.CharsetID = drv.nStrConv.GetLangID()
// default:
// return fmt.Errorf("unsupported regular type: %s", regularTypeName)
// }
// cust.attribs = append(cust.attribs, param)
// drv.mu.Lock()
// defer drv.mu.Unlock()
// drv.cusTyp[strings.ToUpper(arrayTypeName)] = cust
// return nil
//}
func RegisterType(conn *sql.DB, typeName, arrayTypeName string, typeObj interface{}) error {
// ping first to avoid error when calling register type after open connection
err := conn.Ping()
if err != nil {
return err
}
if drv, ok := conn.Driver().(*OracleDriver); ok {
return RegisterTypeWithOwner(conn, drv.UserId, typeName, arrayTypeName, typeObj)
}
return errors.New("the driver used is not a go-ora driver type")
}
func RegisterTypeWithOwner(conn *sql.DB, owner, typeName, arrayTypeName string, typeObj interface{}) error {
if len(owner) == 0 {
return errors.New("owner can't be empty")
}
drv := conn.Driver().(*OracleDriver)
//if typeObj == nil {
// return errors.New("type object cannot be nil")
//}
var typ reflect.Type
if typeObj != nil {
typ = reflect.TypeOf(typeObj)
switch typ.Kind() {
case reflect.Ptr:
return errors.New("unsupported type object: Ptr")
case reflect.Array:
return errors.New("unsupported type object: Array")
case reflect.Chan:
return errors.New("unsupported type object: Chan")
case reflect.Map:
return errors.New("unsupported type object: Map")
case reflect.Slice:
return errors.New("unsupported type object: Slice")
}
}
typeName = strings.TrimSpace(typeName)
arrayTypeName = strings.TrimSpace(arrayTypeName)
if len(typeName) == 0 {
return errors.New("typeName shouldn't be empty")
}
cust := customType{
owner: owner,
name: typeName,
//arrayTypeName: arrayTypeName,
typ: typ,
}
arrayCust := customType{owner: owner, name: arrayTypeName, isArray: true}
var err error
arrayParam := ParameterInfo{Direction: Input, Flag: 3, TypeName: typeName, MaxLen: 1, MaxCharLen: 1}
switch strings.ToUpper(typeName) {
case "NUMBER":
arrayParam.DataType = NUMBER
case "VARCHAR2":
arrayParam.DataType = NCHAR
arrayParam.CharsetForm = 1
arrayParam.ContFlag = 16
arrayParam.CharsetID = drv.sStrConv.GetLangID()
case "NVARCHAR2":
arrayParam.DataType = NCHAR
arrayParam.CharsetForm = 2
arrayParam.ContFlag = 16
arrayParam.CharsetID = drv.nStrConv.GetLangID()
case "TIMESTAMP":
arrayParam.DataType = TimeStampDTY
case "DATE":
arrayParam.DataType = DATE
case "TIMESTAMP WITH LOCAL TIME ZONE":
arrayParam.DataType = TimeStampLTZ_DTY
//case "TIMESTAMP WITH TIME ZONE":
// arrayParam.DataType = TimeStampTZ_DTY
// arrayParam.MaxLen = converters.MAX_LEN_TIMESTAMP
case "RAW":
arrayParam.DataType = RAW
case "BLOB":
arrayParam.DataType = OCIBlobLocator
case "CLOB":
arrayParam.DataType = OCIClobLocator
arrayParam.CharsetForm = 1
arrayParam.ContFlag = 16
arrayParam.CharsetID = drv.sStrConv.GetLangID()
case "NCLOB":
arrayParam.DataType = OCIClobLocator
arrayParam.CharsetForm = 2
arrayParam.ContFlag = 16
arrayParam.CharsetID = drv.nStrConv.GetLangID()
default:
if cust.typ == nil {
return errors.New("type object cannot be nil")
}
if typ.Kind() != reflect.Struct {
return errors.New("type object should be of structure type")
}
cust.fieldMap = map[string]int{}
cust.toid, err = getTOID2(conn, owner, typeName)
if err != nil {
return err
}
sqlText := `SELECT ATTR_NAME, ATTR_TYPE_NAME, LENGTH, ATTR_NO
FROM ALL_TYPE_ATTRS
WHERE UPPER(OWNER)=:1 AND UPPER(TYPE_NAME)=:2
ORDER BY ATTR_NO`
rows, err := conn.Query(sqlText, strings.ToUpper(owner), strings.ToUpper(typeName))
if err != nil {
return err
}
var (
attName sql.NullString
attOrder int64
attTypeName sql.NullString
length sql.NullInt64
)
for rows.Next() {
err = rows.Scan(&attName, &attTypeName, &length, &attOrder)
if err != nil {
return err
}
param := ParameterInfo{Direction: Input, Flag: 3}
param.Name = attName.String
param.TypeName = attTypeName.String
switch strings.ToUpper(attTypeName.String) {
case "NUMBER":
param.DataType = NUMBER
param.MaxLen = converters.MAX_LEN_NUMBER
case "VARCHAR2":
param.DataType = NCHAR
param.CharsetForm = 1
param.ContFlag = 16
param.MaxCharLen = int(length.Int64)
param.CharsetID = drv.sStrConv.GetLangID()
param.MaxLen = int(length.Int64) * converters.MaxBytePerChar(param.CharsetID)
case "NVARCHAR2":
param.DataType = NCHAR
param.CharsetForm = 2
param.ContFlag = 16
param.MaxCharLen = int(length.Int64)
param.CharsetID = drv.nStrConv.GetLangID()
param.MaxLen = int(length.Int64) * converters.MaxBytePerChar(param.CharsetID)
case "TIMESTAMP":
param.DataType = TimeStampDTY
param.MaxLen = converters.MAX_LEN_DATE
case "DATE":
param.DataType = DATE
param.MaxLen = converters.MAX_LEN_DATE
case "TIMESTAMP WITH LOCAL TIME ZONE":
param.DataType = TimeStampLTZ_DTY
param.MaxLen = converters.MAX_LEN_DATE
case "TIMESTAMP WITH TIME ZONE":
param.DataType = TimeStampTZ_DTY
param.MaxLen = converters.MAX_LEN_TIMESTAMP
case "RAW":
param.DataType = RAW
param.MaxLen = int(length.Int64)
case "BLOB":
param.DataType = OCIBlobLocator
param.MaxLen = int(length.Int64)
case "CLOB":
param.DataType = OCIClobLocator
param.CharsetForm = 1
param.ContFlag = 16
param.CharsetID = drv.sStrConv.GetLangID()
param.MaxCharLen = int(length.Int64)
param.MaxLen = int(length.Int64) * converters.MaxBytePerChar(param.CharsetID)
case "NCLOB":
param.DataType = OCIClobLocator
param.CharsetForm = 2
param.ContFlag = 16
param.CharsetID = drv.nStrConv.GetLangID()
param.MaxCharLen = int(length.Int64)
param.MaxLen = int(length.Int64) * converters.MaxBytePerChar(param.CharsetID)
default:
found := false
for name, value := range drv.cusTyp {
if strings.EqualFold(name, attTypeName.String) {
found = true
param.DataType = XMLType
param.cusType = new(customType)
*param.cusType = value
param.ToID = value.toid
break
}
//if strings.EqualFold(value.arrayTypeName, attTypeName.String) {
// found = true
// param.cusType = new(customType)
// param.DataType = XMLType
// *param.cusType = value
// param.cusType.isArray = true
// param.ToID = value.arrayTOID
// break
//}
}
if !found {
return fmt.Errorf("unsupported attribute type: %s", attTypeName.String)
}
}
cust.attribs = append(cust.attribs, param)
}
if len(cust.attribs) == 0 {
return fmt.Errorf("unknown or empty type: %s", typeName)
}
arrayParam.DataType = XMLType
arrayParam.cusType = new(customType)
*arrayParam.cusType = cust
cust.loadFieldMap()
drv.mu.Lock()
drv.cusTyp[strings.ToUpper(typeName)] = cust
drv.mu.Unlock()
}
if len(arrayTypeName) > 0 {
var err error
arrayCust.toid, err = getTOID2(conn, owner, arrayTypeName)
if err != nil {
return err
}
arrayCust.attribs = append(arrayCust.attribs, arrayParam)
drv.mu.Lock()
drv.cusTyp[strings.ToUpper(arrayTypeName)] = arrayCust
drv.mu.Unlock()
}
return nil
}
func ParseConfig(dsn string) (*configurations.ConnectionConfig, error) {
config, err := configurations.ParseConfig(dsn)
if err != nil {
return nil, err
}
if len(config.OSPassword) > 0 {
SetNTSAuth(&advanced_nego.NTSAuthHash{})
}
return config, nil
//connStr, err := newConnectionStringFromUrl(dsn)
//if err != nil {
// return nil, err
//}
//return &connStr.connOption, nil
}
func RegisterConnConfig(config *configurations.ConnectionConfig) {
oracleDriver.connOption = config
}