Method ComMultiQuery

backend/handler.go:56–66

(
	ctx context.Context,
	c *mysql.Conn,
	query string,
	callback mysql.ResultSpoolFn,
)

	// replacement connection. The final pool close then retires the exact entry.
	if h != nil && h.Handler != nil {
		h.Handler.ConnectionClosed(c)
	}
	if h != nil && h.provider != nil && h.provider.Pool() != nil && c != nil && expectedConn != nil {
		pool := h.provider.Pool()
		if expectedTx != nil {
			// First honor the complete pair. If SessionEnd already removed the old
			// transaction, the nil-transaction binding close below may retire the
			// generic connection, but only if it is still idle and identical.
			_ = pool.CloseConnIfBinding(c.ConnectionID, expectedConn, expectedTx)
			_ = pool.CloseConnIfBinding(c.ConnectionID, expectedConn, nil)
		} else {
			// The nil transaction is part of the identity check. A replacement
			// transaction admitted after the initial snapshot therefore blocks this
			// close instead of being rolled back by an unconditional connection close.