internalClose method
Implementation
@override
void internalClose() {
_bufOpen = false;
_records.clear();
_cursorIndex = -1;
_pendingUpdates.clear();
_changeCount = 0;
// @@@ Symmetric with internalOpen: field creation/destruction is owned by the descendant
// @@@ (TCustomSQLQuery); this shim only unbinds.
bindFields(false);
}