| 1 | /* |
| 2 | * execute.c |
| 3 | * |
| 4 | * $Id$ |
| 5 | * |
| 6 | * Invoke a query |
| 7 | * |
| 8 | * The iODBC driver manager. |
| 9 | * |
| 10 | * Copyright (C) 1995 by Ke Jin <kejin@empress.com> |
| 11 | * |
| 12 | * This library is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU Library General Public |
| 14 | * License as published by the Free Software Foundation; either |
| 15 | * version 2 of the License, or (at your option) any later version. |
| 16 | * |
| 17 | * This library is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 20 | * Library General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU Library General Public |
| 23 | * License along with this library; if not, write to the Free |
| 24 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 25 | */ |
| 26 | |
| 27 | #include "config.h" |
| 28 | |
| 29 | #include "isql.h" |
| 30 | #include "isqlext.h" |
| 31 | |
| 32 | #include "dlproc.h" |
| 33 | |
| 34 | #include "herr.h" |
| 35 | #include "henv.h" |
| 36 | #include "hdbc.h" |
| 37 | #include "hstmt.h" |
| 38 | |
| 39 | #include "itrace.h" |
| 40 | |
| 41 | static void |
| 42 | do_cursoropen (STMT_t FAR * pstmt) |
| 43 | { |
| 44 | RETCODE retcode; |
| 45 | SWORD ncol; |
| 46 | |
| 47 | pstmt->state = en_stmt_executed; |
| 48 | |
| 49 | retcode = SQLNumResultCols (pstmt, &ncol); |
| 50 | |
| 51 | if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) |
| 52 | { |
| 53 | if (ncol) |
| 54 | { |
| 55 | pstmt->state = en_stmt_cursoropen; |
| 56 | pstmt->cursor_state = en_stmt_cursor_opened; |
| 57 | } |
| 58 | else |
| 59 | { |
| 60 | pstmt->state = en_stmt_executed; |
| 61 | pstmt->cursor_state = en_stmt_cursor_no; |
| 62 | } |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | |
| 67 | RETCODE SQL_API |
| 68 | SQLExecute (HSTMT hstmt) |
| 69 | { |
| 70 | STMT_t FAR *pstmt = (STMT_t FAR *) hstmt; |
| 71 | HPROC hproc = SQL_NULL_HPROC; |
| 72 | RETCODE retcode; |
| 73 | |
| 74 | int sqlstat = en_00000; |
| 75 | |
| 76 | if (hstmt == SQL_NULL_HSTMT || pstmt->hdbc == SQL_NULL_HDBC) |
| 77 | { |
| 78 | return SQL_INVALID_HANDLE; |
| 79 | } |
| 80 | |
| 81 | /* check state */ |
| 82 | if (pstmt->asyn_on == en_NullProc) |
| 83 | { |
| 84 | switch (pstmt->state) |
| 85 | { |
| 86 | case en_stmt_allocated: |
| 87 | sqlstat = en_S1010; |
| 88 | break; |
| 89 | |
| 90 | case en_stmt_executed: |
| 91 | if (!pstmt->prep_state) |
| 92 | { |
| 93 | sqlstat = en_S1010; |
| 94 | } |
| 95 | break; |
| 96 | |
| 97 | case en_stmt_cursoropen: |
| 98 | if (!pstmt->prep_state) |
| 99 | { |
| 100 | sqlstat = en_S1010; |
| 101 | } |
| 102 | break; |
| 103 | |
| 104 | case en_stmt_fetched: |
| 105 | case en_stmt_xfetched: |
| 106 | if (!pstmt->prep_state) |
| 107 | { |
| 108 | sqlstat = en_S1010; |
| 109 | } |
| 110 | else |
| 111 | { |
| 112 | sqlstat = en_24000; |
| 113 | } |
| 114 | break; |
| 115 | |
| 116 | case en_stmt_needdata: |
| 117 | case en_stmt_mustput: |
| 118 | case en_stmt_canput: |
| 119 | sqlstat = en_S1010; |
| 120 | break; |
| 121 | |
| 122 | default: |
| 123 | break; |
| 124 | } |
| 125 | } |
| 126 | else if (pstmt->asyn_on != en_Execute) |
| 127 | { |
| 128 | sqlstat = en_S1010; |
| 129 | } |
| 130 | |
| 131 | if (sqlstat == en_00000) |
| 132 | { |
| 133 | hproc = _iodbcdm_getproc (pstmt->hdbc, en_Execute); |
| 134 | |
| 135 | if (hproc == SQL_NULL_HPROC) |
| 136 | { |
| 137 | sqlstat = en_IM001; |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | if (sqlstat != en_00000) |
| 142 | { |
| 143 | PUSHSQLERR (pstmt->herr, sqlstat); |
| 144 | |
| 145 | return SQL_ERROR; |
| 146 | } |
| 147 | |
| 148 | CALL_DRIVER (pstmt->hdbc, retcode, hproc, en_Execute, |
| 149 | (pstmt->dhstmt)) |
| 150 | |
| 151 | /* stmt state transition */ |
| 152 | if (pstmt->asyn_on == en_Execute) |
| 153 | { |
| 154 | switch (retcode) |
| 155 | { |
| 156 | case SQL_SUCCESS: |
| 157 | case SQL_SUCCESS_WITH_INFO: |
| 158 | case SQL_NEED_DATA: |
| 159 | case SQL_ERROR: |
| 160 | pstmt->asyn_on = en_NullProc; |
| 161 | break; |
| 162 | |
| 163 | case SQL_STILL_EXECUTING: |
| 164 | default: |
| 165 | return retcode; |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | switch (pstmt->state) |
| 170 | { |
| 171 | case en_stmt_prepared: |
| 172 | switch (retcode) |
| 173 | { |
| 174 | case SQL_SUCCESS: |
| 175 | case SQL_SUCCESS_WITH_INFO: |
| 176 | do_cursoropen (hstmt); |
| 177 | break; |
| 178 | |
| 179 | case SQL_NEED_DATA: |
| 180 | pstmt->state = en_stmt_needdata; |
| 181 | pstmt->need_on = en_Execute; |
| 182 | break; |
| 183 | |
| 184 | case SQL_STILL_EXECUTING: |
| 185 | pstmt->asyn_on = en_Execute; |
| 186 | break; |
| 187 | |
| 188 | default: |
| 189 | break; |
| 190 | } |
| 191 | break; |
| 192 | |
| 193 | case en_stmt_executed: |
| 194 | switch (retcode) |
| 195 | { |
| 196 | case SQL_ERROR: |
| 197 | pstmt->state = en_stmt_allocated; |
| 198 | pstmt->cursor_state = en_stmt_cursor_no; |
| 199 | pstmt->prep_state = 0; |
| 200 | break; |
| 201 | |
| 202 | case SQL_NEED_DATA: |
| 203 | pstmt->state = en_stmt_needdata; |
| 204 | pstmt->need_on = en_Execute; |
| 205 | break; |
| 206 | |
| 207 | case SQL_STILL_EXECUTING: |
| 208 | pstmt->asyn_on = en_Execute; |
| 209 | break; |
| 210 | |
| 211 | default: |
| 212 | break; |
| 213 | } |
| 214 | break; |
| 215 | |
| 216 | default: |
| 217 | break; |
| 218 | } |
| 219 | |
| 220 | return retcode; |
| 221 | } |
| 222 | |
| 223 | |
| 224 | RETCODE SQL_API |
| 225 | SQLExecDirect ( |
| 226 | HSTMT hstmt, |
| 227 | UCHAR FAR * szSqlStr, |
| 228 | SDWORD cbSqlStr) |
| 229 | { |
| 230 | STMT_t FAR *pstmt = (STMT_t FAR *) hstmt; |
| 231 | HPROC hproc = SQL_NULL_HPROC; |
| 232 | |
| 233 | int sqlstat = en_00000; |
| 234 | RETCODE retcode = SQL_SUCCESS; |
| 235 | |
| 236 | if (hstmt == SQL_NULL_HSTMT || pstmt->hdbc == SQL_NULL_HDBC) |
| 237 | { |
| 238 | return SQL_INVALID_HANDLE; |
| 239 | } |
| 240 | |
| 241 | /* check arguments */ |
| 242 | if (szSqlStr == NULL) |
| 243 | { |
| 244 | sqlstat = en_S1009; |
| 245 | } |
| 246 | else if (cbSqlStr < 0 && cbSqlStr != SQL_NTS) |
| 247 | { |
| 248 | sqlstat = en_S1090; |
| 249 | } |
| 250 | |
| 251 | if (sqlstat != en_00000) |
| 252 | { |
| 253 | PUSHSQLERR (pstmt->herr, sqlstat); |
| 254 | |
| 255 | return SQL_ERROR; |
| 256 | } |
| 257 | |
| 258 | /* check state */ |
| 259 | if (pstmt->asyn_on == en_NullProc) |
| 260 | { |
| 261 | switch (pstmt->state) |
| 262 | { |
| 263 | case en_stmt_fetched: |
| 264 | case en_stmt_xfetched: |
| 265 | sqlstat = en_24000; |
| 266 | break; |
| 267 | |
| 268 | case en_stmt_needdata: |
| 269 | case en_stmt_mustput: |
| 270 | case en_stmt_canput: |
| 271 | sqlstat = en_S1010; |
| 272 | break; |
| 273 | |
| 274 | default: |
| 275 | break; |
| 276 | } |
| 277 | } |
| 278 | else if (pstmt->asyn_on != en_ExecDirect) |
| 279 | { |
| 280 | sqlstat = en_S1010; |
| 281 | } |
| 282 | |
| 283 | if (sqlstat != en_00000) |
| 284 | { |
| 285 | PUSHSQLERR (pstmt->herr, sqlstat); |
| 286 | |
| 287 | return SQL_ERROR; |
| 288 | } |
| 289 | |
| 290 | hproc = _iodbcdm_getproc (pstmt->hdbc, en_ExecDirect); |
| 291 | |
| 292 | if (hproc == SQL_NULL_HPROC) |
| 293 | { |
| 294 | PUSHSQLERR (pstmt->herr, en_IM001); |
| 295 | |
| 296 | return SQL_ERROR; |
| 297 | } |
| 298 | |
| 299 | CALL_DRIVER (pstmt->hdbc, retcode, hproc, en_ExecDirect, |
| 300 | (pstmt->dhstmt, szSqlStr, cbSqlStr)) |
| 301 | |
| 302 | /* stmt state transition */ |
| 303 | if (pstmt->asyn_on == en_ExecDirect) |
| 304 | { |
| 305 | switch (retcode) |
| 306 | { |
| 307 | case SQL_SUCCESS: |
| 308 | case SQL_SUCCESS_WITH_INFO: |
| 309 | case SQL_NEED_DATA: |
| 310 | case SQL_ERROR: |
| 311 | pstmt->asyn_on = en_NullProc; |
| 312 | break; |
| 313 | |
| 314 | case SQL_STILL_EXECUTING: |
| 315 | default: |
| 316 | return retcode; |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | if (pstmt->state <= en_stmt_executed) |
| 321 | { |
| 322 | switch (retcode) |
| 323 | { |
| 324 | case SQL_SUCCESS: |
| 325 | case SQL_SUCCESS_WITH_INFO: |
| 326 | do_cursoropen (hstmt); |
| 327 | break; |
| 328 | |
| 329 | case SQL_NEED_DATA: |
| 330 | pstmt->state = en_stmt_needdata; |
| 331 | pstmt->need_on = en_ExecDirect; |
| 332 | break; |
| 333 | |
| 334 | case SQL_STILL_EXECUTING: |
| 335 | pstmt->asyn_on = en_ExecDirect; |
| 336 | break; |
| 337 | |
| 338 | case SQL_ERROR: |
| 339 | pstmt->state = en_stmt_allocated; |
| 340 | pstmt->cursor_state = en_stmt_cursor_no; |
| 341 | pstmt->prep_state = 0; |
| 342 | break; |
| 343 | |
| 344 | default: |
| 345 | break; |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | return retcode; |
| 350 | } |
| 351 | |
| 352 | |
| 353 | RETCODE SQL_API |
| 354 | SQLPutData ( |
| 355 | HSTMT hstmt, |
| 356 | PTR rgbValue, |
| 357 | SDWORD cbValue) |
| 358 | { |
| 359 | STMT_t FAR *pstmt = (STMT_t FAR *) hstmt; |
| 360 | HPROC hproc; |
| 361 | RETCODE retcode; |
| 362 | |
| 363 | if (hstmt == SQL_NULL_HSTMT || pstmt->hdbc == SQL_NULL_HDBC) |
| 364 | { |
| 365 | return SQL_INVALID_HANDLE; |
| 366 | } |
| 367 | |
| 368 | /* check argument value */ |
| 369 | if (rgbValue == NULL && |
| 370 | (cbValue != SQL_DEFAULT_PARAM && cbValue != SQL_NULL_DATA)) |
| 371 | { |
| 372 | PUSHSQLERR (pstmt->herr, en_S1009); |
| 373 | |
| 374 | return SQL_ERROR; |
| 375 | } |
| 376 | |
| 377 | /* check state */ |
| 378 | if (pstmt->asyn_on == en_NullProc) |
| 379 | { |
| 380 | if (pstmt->state <= en_stmt_xfetched) |
| 381 | { |
| 382 | PUSHSQLERR (pstmt->herr, en_S1010); |
| 383 | |
| 384 | return SQL_ERROR; |
| 385 | } |
| 386 | } |
| 387 | else if (pstmt->asyn_on != en_PutData) |
| 388 | { |
| 389 | PUSHSQLERR (pstmt->herr, en_S1010); |
| 390 | |
| 391 | return SQL_ERROR; |
| 392 | } |
| 393 | |
| 394 | /* call driver */ |
| 395 | hproc = _iodbcdm_getproc (pstmt->hdbc, en_PutData); |
| 396 | |
| 397 | if (hproc == SQL_NULL_HPROC) |
| 398 | { |
| 399 | PUSHSQLERR (pstmt->herr, en_IM001); |
| 400 | |
| 401 | return SQL_ERROR; |
| 402 | } |
| 403 | |
| 404 | CALL_DRIVER (pstmt->hdbc, retcode, hproc, en_PutData, |
| 405 | (pstmt->dhstmt, rgbValue, cbValue)) |
| 406 | |
| 407 | /* state transition */ |
| 408 | if (pstmt->asyn_on == en_PutData) |
| 409 | { |
| 410 | switch (retcode) |
| 411 | { |
| 412 | case SQL_SUCCESS: |
| 413 | case SQL_SUCCESS_WITH_INFO: |
| 414 | case SQL_ERROR: |
| 415 | pstmt->asyn_on = en_NullProc; |
| 416 | break; |
| 417 | |
| 418 | case SQL_STILL_EXECUTING: |
| 419 | default: |
| 420 | return retcode; |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | /* must in mustput or canput states */ |
| 425 | switch (retcode) |
| 426 | { |
| 427 | case SQL_SUCCESS: |
| 428 | case SQL_SUCCESS_WITH_INFO: |
| 429 | pstmt->state = en_stmt_canput; |
| 430 | break; |
| 431 | |
| 432 | case SQL_ERROR: |
| 433 | switch (pstmt->need_on) |
| 434 | { |
| 435 | case en_ExecDirect: |
| 436 | pstmt->state = en_stmt_allocated; |
| 437 | pstmt->need_on = en_NullProc; |
| 438 | break; |
| 439 | |
| 440 | case en_Execute: |
| 441 | if (pstmt->prep_state) |
| 442 | { |
| 443 | pstmt->state = en_stmt_prepared; |
| 444 | pstmt->need_on = en_NullProc; |
| 445 | } |
| 446 | break; |
| 447 | |
| 448 | case en_SetPos: |
| 449 | /* Is this possible ???? */ |
| 450 | pstmt->state = en_stmt_xfetched; |
| 451 | break; |
| 452 | |
| 453 | default: |
| 454 | break; |
| 455 | } |
| 456 | break; |
| 457 | |
| 458 | case SQL_STILL_EXECUTING: |
| 459 | pstmt->asyn_on = en_PutData; |
| 460 | break; |
| 461 | |
| 462 | default: |
| 463 | break; |
| 464 | } |
| 465 | |
| 466 | return retcode; |
| 467 | } |
| 468 | |
| 469 | |
| 470 | RETCODE SQL_API |
| 471 | SQLParamData ( |
| 472 | HSTMT hstmt, |
| 473 | PTR FAR * prgbValue) |
| 474 | { |
| 475 | STMT_t FAR *pstmt = (STMT_t FAR *) hstmt; |
| 476 | HPROC hproc; |
| 477 | RETCODE retcode; |
| 478 | |
| 479 | if (hstmt == SQL_NULL_HSTMT || pstmt->hdbc == SQL_NULL_HDBC) |
| 480 | { |
| 481 | return SQL_INVALID_HANDLE; |
| 482 | } |
| 483 | |
| 484 | /* check argument */ |
| 485 | |
| 486 | /* check state */ |
| 487 | if (pstmt->asyn_on == en_NullProc) |
| 488 | { |
| 489 | if (pstmt->state <= en_stmt_xfetched) |
| 490 | { |
| 491 | PUSHSQLERR (pstmt->herr, en_S1010); |
| 492 | |
| 493 | return SQL_ERROR; |
| 494 | } |
| 495 | } |
| 496 | else if (pstmt->asyn_on != en_ParamData) |
| 497 | { |
| 498 | PUSHSQLERR (pstmt->herr, en_S1010); |
| 499 | |
| 500 | return SQL_ERROR; |
| 501 | } |
| 502 | |
| 503 | /* call driver */ |
| 504 | hproc = _iodbcdm_getproc (pstmt->hdbc, en_ParamData); |
| 505 | |
| 506 | if (hproc == SQL_NULL_HPROC) |
| 507 | { |
| 508 | PUSHSQLERR (pstmt->herr, en_IM001); |
| 509 | |
| 510 | return SQL_ERROR; |
| 511 | } |
| 512 | |
| 513 | CALL_DRIVER (pstmt->hdbc, retcode, hproc, en_ParamData, |
| 514 | (pstmt->dhstmt, prgbValue)) |
| 515 | |
| 516 | /* state transition */ |
| 517 | if (pstmt->asyn_on == en_ParamData) |
| 518 | { |
| 519 | switch (retcode) |
| 520 | { |
| 521 | case SQL_SUCCESS: |
| 522 | case SQL_SUCCESS_WITH_INFO: |
| 523 | case SQL_ERROR: |
| 524 | pstmt->asyn_on = en_NullProc; |
| 525 | break; |
| 526 | |
| 527 | case SQL_STILL_EXECUTING: |
| 528 | default: |
| 529 | return retcode; |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | if (pstmt->state < en_stmt_needdata) |
| 534 | { |
| 535 | return retcode; |
| 536 | } |
| 537 | |
| 538 | switch (retcode) |
| 539 | { |
| 540 | case SQL_ERROR: |
| 541 | switch (pstmt->need_on) |
| 542 | { |
| 543 | case en_ExecDirect: |
| 544 | pstmt->state = en_stmt_allocated; |
| 545 | break; |
| 546 | |
| 547 | case en_Execute: |
| 548 | pstmt->state = en_stmt_prepared; |
| 549 | break; |
| 550 | |
| 551 | case en_SetPos: |
| 552 | pstmt->state = en_stmt_xfetched; |
| 553 | pstmt->cursor_state |
| 554 | = en_stmt_cursor_xfetched; |
| 555 | break; |
| 556 | |
| 557 | default: |
| 558 | break; |
| 559 | } |
| 560 | pstmt->need_on = en_NullProc; |
| 561 | break; |
| 562 | |
| 563 | case SQL_SUCCESS: |
| 564 | case SQL_SUCCESS_WITH_INFO: |
| 565 | switch (pstmt->state) |
| 566 | { |
| 567 | case en_stmt_needdata: |
| 568 | pstmt->state = en_stmt_mustput; |
| 569 | break; |
| 570 | |
| 571 | case en_stmt_canput: |
| 572 | switch (pstmt->need_on) |
| 573 | { |
| 574 | case en_SetPos: |
| 575 | pstmt->state |
| 576 | = en_stmt_xfetched; |
| 577 | pstmt->cursor_state |
| 578 | = en_stmt_cursor_xfetched; |
| 579 | break; |
| 580 | |
| 581 | case en_ExecDirect: |
| 582 | case en_Execute: |
| 583 | do_cursoropen (hstmt); |
| 584 | break; |
| 585 | |
| 586 | default: |
| 587 | break; |
| 588 | } |
| 589 | break; |
| 590 | |
| 591 | default: |
| 592 | break; |
| 593 | } |
| 594 | pstmt->need_on = en_NullProc; |
| 595 | break; |
| 596 | |
| 597 | case SQL_NEED_DATA: |
| 598 | pstmt->state = en_stmt_mustput; |
| 599 | break; |
| 600 | |
| 601 | default: |
| 602 | break; |
| 603 | } |
| 604 | |
| 605 | return retcode; |
| 606 | } |
| 607 | |
| 608 | |
| 609 | RETCODE SQL_API |
| 610 | SQLNumParams ( |
| 611 | HSTMT hstmt, |
| 612 | SWORD FAR * pcpar) |
| 613 | { |
| 614 | STMT_t FAR *pstmt = (STMT_t FAR *) hstmt; |
| 615 | HPROC hproc; |
| 616 | RETCODE retcode; |
| 617 | |
| 618 | if (hstmt == SQL_NULL_HSTMT || pstmt->hdbc == SQL_NULL_HDBC) |
| 619 | { |
| 620 | return SQL_INVALID_HANDLE; |
| 621 | } |
| 622 | |
| 623 | /* check argument */ |
| 624 | |
| 625 | /* check state */ |
| 626 | if (pstmt->asyn_on == en_NullProc) |
| 627 | { |
| 628 | switch (pstmt->state) |
| 629 | { |
| 630 | case en_stmt_allocated: |
| 631 | case en_stmt_needdata: |
| 632 | case en_stmt_mustput: |
| 633 | case en_stmt_canput: |
| 634 | PUSHSQLERR (pstmt->herr, en_S1010); |
| 635 | return SQL_ERROR; |
| 636 | |
| 637 | default: |
| 638 | break; |
| 639 | } |
| 640 | } |
| 641 | else if (pstmt->asyn_on != en_NumParams) |
| 642 | { |
| 643 | PUSHSQLERR (pstmt->herr, en_S1010); |
| 644 | |
| 645 | return SQL_ERROR; |
| 646 | } |
| 647 | |
| 648 | /* call driver */ |
| 649 | hproc = _iodbcdm_getproc (pstmt->hdbc, en_NumParams); |
| 650 | |
| 651 | if (hproc == SQL_NULL_HPROC) |
| 652 | { |
| 653 | PUSHSQLERR (pstmt->herr, en_IM001); |
| 654 | |
| 655 | return SQL_ERROR; |
| 656 | } |
| 657 | |
| 658 | CALL_DRIVER (pstmt->hdbc, retcode, hproc, en_NumParams, |
| 659 | (pstmt->dhstmt, pcpar)) |
| 660 | |
| 661 | /* state transition */ |
| 662 | if (pstmt->asyn_on == en_NumParams) |
| 663 | { |
| 664 | switch (retcode) |
| 665 | { |
| 666 | case SQL_SUCCESS: |
| 667 | case SQL_SUCCESS_WITH_INFO: |
| 668 | case SQL_ERROR: |
| 669 | break; |
| 670 | |
| 671 | default: |
| 672 | return retcode; |
| 673 | } |
| 674 | } |
| 675 | |
| 676 | if (retcode == SQL_STILL_EXECUTING) |
| 677 | { |
| 678 | pstmt->asyn_on = en_NumParams; |
| 679 | } |
| 680 | |
| 681 | return retcode; |
| 682 | } |
| 683 | |
| 684 | |
| 685 | RETCODE SQL_API |
| 686 | SQLDescribeParam ( |
| 687 | HSTMT hstmt, |
| 688 | UWORD ipar, |
| 689 | SWORD FAR * pfSqlType, |
| 690 | UDWORD FAR * pcbColDef, |
| 691 | SWORD FAR * pibScale, |
| 692 | SWORD FAR * pfNullable) |
| 693 | { |
| 694 | STMT_t FAR *pstmt = (STMT_t FAR *) hstmt; |
| 695 | HPROC hproc; |
| 696 | RETCODE retcode; |
| 697 | |
| 698 | if (hstmt == SQL_NULL_HSTMT || pstmt->hdbc == SQL_NULL_HDBC) |
| 699 | { |
| 700 | return SQL_INVALID_HANDLE; |
| 701 | } |
| 702 | |
| 703 | /* check argument */ |
| 704 | if (ipar == 0) |
| 705 | { |
| 706 | PUSHSQLERR (pstmt->herr, en_S1093); |
| 707 | |
| 708 | return SQL_ERROR; |
| 709 | } |
| 710 | |
| 711 | /* check state */ |
| 712 | if (pstmt->asyn_on == en_NullProc) |
| 713 | { |
| 714 | switch (pstmt->state) |
| 715 | { |
| 716 | case en_stmt_allocated: |
| 717 | case en_stmt_needdata: |
| 718 | case en_stmt_mustput: |
| 719 | case en_stmt_canput: |
| 720 | PUSHSQLERR (pstmt->herr, en_S1010); |
| 721 | return SQL_ERROR; |
| 722 | |
| 723 | default: |
| 724 | break; |
| 725 | } |
| 726 | } |
| 727 | else if (pstmt->asyn_on != en_DescribeParam) |
| 728 | { |
| 729 | PUSHSQLERR (pstmt->herr, en_S1010); |
| 730 | |
| 731 | return SQL_ERROR; |
| 732 | } |
| 733 | |
| 734 | /* call driver */ |
| 735 | hproc = _iodbcdm_getproc (pstmt->hdbc, en_DescribeParam); |
| 736 | |
| 737 | if (hproc == SQL_NULL_HPROC) |
| 738 | { |
| 739 | PUSHSQLERR (pstmt->herr, en_IM001); |
| 740 | |
| 741 | return SQL_ERROR; |
| 742 | } |
| 743 | |
| 744 | CALL_DRIVER (pstmt->hdbc, retcode, hproc, en_DescribeParam, |
| 745 | (pstmt->dhstmt, ipar, pfSqlType, pcbColDef, pibScale, pfNullable)) |
| 746 | |
| 747 | /* state transition */ |
| 748 | if (pstmt->asyn_on == en_DescribeParam) |
| 749 | { |
| 750 | switch (retcode) |
| 751 | { |
| 752 | case SQL_SUCCESS: |
| 753 | case SQL_SUCCESS_WITH_INFO: |
| 754 | case SQL_ERROR: |
| 755 | break; |
| 756 | |
| 757 | default: |
| 758 | return retcode; |
| 759 | } |
| 760 | } |
| 761 | |
| 762 | if (retcode == SQL_STILL_EXECUTING) |
| 763 | { |
| 764 | pstmt->asyn_on = en_DescribeParam; |
| 765 | } |
| 766 | |
| 767 | return retcode; |
| 768 | } |