增加websocket支持

vendor/github.com/jackc/pgx/v5/copy_from.go

@@ -64,33 +64,6 @@ func (cts *copyFromSlice) Err() error {
 	return cts.err
 }
 
-// CopyFromFunc returns a CopyFromSource interface that relies on nxtf for values.
-// nxtf returns rows until it either signals an 'end of data' by returning row=nil and err=nil,
-// or it returns an error. If nxtf returns an error, the copy is aborted.
-func CopyFromFunc(nxtf func() (row []any, err error)) CopyFromSource {
-	return &copyFromFunc{next: nxtf}
-}
-
-type copyFromFunc struct {
-	next     func() ([]any, error)
-	valueRow []any
-	err      error
-}
-
-func (g *copyFromFunc) Next() bool {
-	g.valueRow, g.err = g.next()
-	// only return true if valueRow exists and no error
-	return g.valueRow != nil && g.err == nil
-}
-
-func (g *copyFromFunc) Values() ([]any, error) {
-	return g.valueRow, g.err
-}
-
-func (g *copyFromFunc) Err() error {
-	return g.err
-}
-
 // CopyFromSource is the interface used by *Conn.CopyFrom as the source for copy data.
 type CopyFromSource interface {
 	// Next returns true if there is another row and makes the next row data