| 391 | } |
| 392 | |
| 393 | virtual const StmtNode* execute(thread_db* tdbb, Request* request, ExeState* exeState) const |
| 394 | { |
| 395 | impure_state* const impure = request->getImpure<impure_state>(impureOffset); |
| 396 | ExtEngineManager::ResultSet*& resultSet = request->req_ext_resultset; |
| 397 | UCHAR* extInMsg = extInMessageNode ? request->getImpure<UCHAR>(extInMessageNode->impureOffset) : NULL; |
| 398 | UCHAR* extOutMsg = extOutMessageNode ? request->getImpure<UCHAR>(extOutMessageNode->impureOffset) : NULL; |
| 399 | UCHAR* intOutMsg = intOutMessageNode ? request->getImpure<UCHAR>(intOutMessageNode->impureOffset) : NULL; |
| 400 | SSHORT* eof = intOutMsg ? |
| 401 | (SSHORT*) (intOutMsg + (IPTR) intOutMessageNode->format->fmt_desc.back().dsc_address) : NULL; |
| 402 | |
| 403 | switch (request->req_operation) |
| 404 | { |
| 405 | case Request::req_evaluate: |
| 406 | impure->sta_state = 0; |
| 407 | *eof = 0; |
| 408 | |
| 409 | fb_assert(!resultSet); |
| 410 | resultSet = procedure->open(tdbb, extInMsg, extOutMsg); |
| 411 | |
| 412 | if (!resultSet) |
| 413 | break; |
| 414 | // fall into |
| 415 | |
| 416 | case Request::req_proceed: |
| 417 | case Request::req_sync: |
| 418 | *eof = 0; |
| 419 | if (resultSet) |
| 420 | { |
| 421 | if (resultSet->fetch(tdbb) && (request->req_flags & req_proc_fetch)) |
| 422 | *eof = -1; |
| 423 | else |
| 424 | { |
| 425 | delete resultSet; |
| 426 | resultSet = NULL; |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | impure->sta_state = 0; // suspend node |
| 431 | |
| 432 | if (!*eof) |
| 433 | request->req_operation = Request::req_return; |
| 434 | else |
| 435 | request->req_operation = Request::req_sync; |
| 436 | |
| 437 | break; |
| 438 | |
| 439 | case Request::req_unwind: |
| 440 | delete resultSet; |
| 441 | resultSet = NULL; |
| 442 | break; |
| 443 | } |
| 444 | |
| 445 | return CompoundStmtNode::execute(tdbb, request, exeState); |
| 446 | } |
| 447 | |
| 448 | private: |
| 449 | MessageNode* extInMessageNode; |