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ref_cursor.go
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ref_cursor.go
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package go_ora
import (
"github.com/sijms/go-ora/network"
)
type RefCursor struct {
defaultStmt
len uint8
MaxRowSize int
parent *defaultStmt
//ID int
//scnFromExe []int
//connection *Connection
//noOfRowsToFetch int
//hasMoreRows bool
}
func (cursor *RefCursor) load(session *network.Session) error {
// initialize ref cursor object
cursor.text = ""
cursor._hasLONG = false
cursor._hasBLOB = false
cursor._hasReturnClause = false
cursor.disableCompression = true
cursor.arrayBindCount = 1
cursor.scnFromExe = make([]int, 2)
cursor.stmtType = SELECT
var err error
cursor.len, err = session.GetByte()
if err != nil {
return err
}
cursor.MaxRowSize, err = session.GetInt(4, true, true)
if err != nil {
return err
}
columnCount, err := session.GetInt(4, true, true)
if err != nil {
return err
}
if columnCount > 0 {
cursor.columns = make([]ParameterInfo, columnCount)
_, err = session.GetByte()
if err != nil {
return err
}
for x := 0; x < len(cursor.columns); x++ {
err = cursor.columns[x].load(session)
if err != nil {
return err
}
}
//for _, col := range cursor.Cols {
// err = col.load(session)
// fmt.Println(col)
// if err != nil {
// return err
// }
//}
}
_, err = session.GetDlc()
if err != nil {
return err
}
if session.TTCVersion >= 3 {
_, err = session.GetInt(4, true, true)
if err != nil {
return err
}
_, err = session.GetInt(4, true, true)
if err != nil {
return err
}
}
if session.TTCVersion >= 4 {
_, err = session.GetInt(4, true, true)
if err != nil {
return err
}
_, err = session.GetInt(4, true, true)
if err != nil {
return err
}
}
if session.TTCVersion >= 5 {
_, err = session.GetDlc()
if err != nil {
return err
}
}
cursor.cursorID, err = session.GetInt(4, true, true)
if err != nil {
return err
}
_, err = session.GetInt(2, true, true)
if err != nil {
return err
}
return nil
}
func (cursor *RefCursor) getExeOptions() int {
return 0x8040
}
func (cursor *RefCursor) Query() (*DataSet, error) {
cursor.connection.connOption.Tracer.Printf("Query RefCursor: %d", cursor.cursorID)
cursor._noOfRowsToFetch = cursor.connection.connOption.PrefetchRows
cursor._hasMoreRows = true
if len(cursor.parent.scnFromExe) > 0 {
copy(cursor.scnFromExe, cursor.parent.scnFromExe)
}
session := cursor.connection.session
session.ResetBuffer()
err := cursor.write()
if err != nil {
return nil, err
}
dataSet := new(DataSet)
err = cursor.read(dataSet)
if err != nil {
return nil, err
}
return dataSet, nil
}
func (cursor *RefCursor) write() error {
err := cursor.basicWrite(cursor.getExeOptions(), false, false)
if err != nil {
return err
}
return cursor.connection.session.Write()
}
func (cursor *RefCursor) Close() error {
return nil
}
//func (cursor *RefCursor) Exec(args []driver.Value) (driver.Result, error) {
// return nil, nil
//}
//
//func (cursor *RefCursor) NumInput() int {
// return -1;
//}
//func (cursor *RefCursor) readQ() (*DataSet, error) {
// dataSet := new(DataSet)
// return dataSet, nil
//}