| 1 | /* |
| 2 | * hstmt.c |
| 3 | * |
| 4 | * $Id$ |
| 5 | * |
| 6 | * Query statement object management functions |
| 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 | RETCODE SQL_API |
| 42 | SQLAllocStmt ( |
| 43 | HDBC hdbc, |
| 44 | HSTMT FAR * phstmt) |
| 45 | { |
| 46 | DBC_t FAR *pdbc = (DBC_t FAR *) hdbc; |
| 47 | STMT_t FAR *pstmt = NULL; |
| 48 | HPROC hproc = SQL_NULL_HPROC; |
| 49 | RETCODE retcode = SQL_SUCCESS; |
| 50 | |
| 51 | #if (ODBCVER >= 0x0300) |
| 52 | if (hdbc == SQL_NULL_HDBC || pdbc->type != SQL_HANDLE_DBC) |
| 53 | #else |
| 54 | if (hdbc == SQL_NULL_HDBC) |
| 55 | #endif |
| 56 | { |
| 57 | return SQL_INVALID_HANDLE; |
| 58 | } |
| 59 | |
| 60 | if (phstmt == NULL) |
| 61 | { |
| 62 | PUSHSQLERR (pdbc->herr, en_S1009); |
| 63 | |
| 64 | return SQL_ERROR; |
| 65 | } |
| 66 | |
| 67 | /* check state */ |
| 68 | switch (pdbc->state) |
| 69 | { |
| 70 | case en_dbc_connected: |
| 71 | case en_dbc_hstmt: |
| 72 | break; |
| 73 | |
| 74 | case en_dbc_allocated: |
| 75 | case en_dbc_needdata: |
| 76 | PUSHSQLERR (pdbc->herr, en_08003); |
| 77 | *phstmt = SQL_NULL_HSTMT; |
| 78 | return SQL_ERROR; |
| 79 | |
| 80 | default: |
| 81 | return SQL_INVALID_HANDLE; |
| 82 | } |
| 83 | |
| 84 | pstmt = (STMT_t FAR *) MEM_ALLOC (sizeof (STMT_t)); |
| 85 | |
| 86 | if (pstmt == NULL) |
| 87 | { |
| 88 | PUSHSQLERR (pdbc->herr, en_S1001); |
| 89 | *phstmt = SQL_NULL_HSTMT; |
| 90 | |
| 91 | return SQL_ERROR; |
| 92 | } |
| 93 | |
| 94 | #if (ODBCVER >= 0x0300) |
| 95 | pstmt->type = SQL_HANDLE_STMT; |
| 96 | #endif |
| 97 | |
| 98 | /* initiate the object */ |
| 99 | pstmt->herr = SQL_NULL_HERR; |
| 100 | pstmt->hdbc = hdbc; |
| 101 | pstmt->state = en_stmt_allocated; |
| 102 | pstmt->cursor_state = en_stmt_cursor_no; |
| 103 | pstmt->prep_state = 0; |
| 104 | pstmt->asyn_on = en_NullProc; |
| 105 | pstmt->need_on = en_NullProc; |
| 106 | |
| 107 | /* call driver's function */ |
| 108 | |
| 109 | #if (ODBCVER >= 0x0300) |
| 110 | hproc = _iodbcdm_getproc (hdbc, en_AllocHandle); |
| 111 | |
| 112 | if (hproc) |
| 113 | { |
| 114 | CALL_DRIVER (pstmt->hdbc, hdbc, retcode, hproc, en_AllocHandle, |
| 115 | (SQL_HANDLE_STMT, pdbc->dhdbc, &(pstmt->dhstmt))) |
| 116 | } |
| 117 | else |
| 118 | #endif |
| 119 | |
| 120 | { |
| 121 | hproc = _iodbcdm_getproc (hdbc, en_AllocStmt); |
| 122 | |
| 123 | if (hproc == SQL_NULL_HPROC) |
| 124 | { |
| 125 | PUSHSQLERR (pstmt->herr, en_IM001); |
| 126 | *phstmt = SQL_NULL_HSTMT; |
| 127 | MEM_FREE (pstmt); |
| 128 | |
| 129 | return SQL_ERROR; |
| 130 | } |
| 131 | |
| 132 | CALL_DRIVER (hdbc, retcode, hproc, en_AllocStmt, |
| 133 | (pdbc->dhdbc, &(pstmt->dhstmt))) |
| 134 | } |
| 135 | |
| 136 | if (retcode != SQL_SUCCESS && retcode != SQL_SUCCESS_WITH_INFO) |
| 137 | { |
| 138 | *phstmt = SQL_NULL_HSTMT; |
| 139 | MEM_FREE (pstmt); |
| 140 | |
| 141 | return retcode; |
| 142 | } |
| 143 | |
| 144 | /* insert into list */ |
| 145 | pstmt->next = pdbc->hstmt; |
| 146 | pdbc->hstmt = pstmt; |
| 147 | |
| 148 | *phstmt = (HSTMT) pstmt; |
| 149 | |
| 150 | /* state transition */ |
| 151 | pdbc->state = en_dbc_hstmt; |
| 152 | |
| 153 | return SQL_SUCCESS; |
| 154 | } |
| 155 | |
| 156 | |
| 157 | RETCODE |
| 158 | _iodbcdm_dropstmt (HSTMT hstmt) |
| 159 | { |
| 160 | STMT_t FAR *pstmt = (STMT_t FAR *) hstmt; |
| 161 | STMT_t FAR *tpstmt; |
| 162 | DBC_t FAR *pdbc; |
| 163 | |
| 164 | if (hstmt == SQL_NULL_HSTMT) |
| 165 | { |
| 166 | return SQL_INVALID_HANDLE; |
| 167 | } |
| 168 | |
| 169 | pdbc = (DBC_t FAR *) (pstmt->hdbc); |
| 170 | |
| 171 | for (tpstmt = (STMT_t FAR *) pdbc->hstmt; |
| 172 | tpstmt != NULL; |
| 173 | tpstmt = tpstmt->next) |
| 174 | { |
| 175 | if (tpstmt == pstmt) |
| 176 | { |
| 177 | pdbc->hstmt = (HSTMT) pstmt->next; |
| 178 | break; |
| 179 | } |
| 180 | |
| 181 | if (tpstmt->next == pstmt) |
| 182 | { |
| 183 | tpstmt->next = pstmt->next; |
| 184 | break; |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | if (tpstmt == NULL) |
| 189 | { |
| 190 | return SQL_INVALID_HANDLE; |
| 191 | } |
| 192 | |
| 193 | _iodbcdm_freesqlerrlist (pstmt->herr); |
| 194 | MEM_FREE (hstmt); |
| 195 | |
| 196 | return SQL_SUCCESS; |
| 197 | } |
| 198 | |
| 199 | |
| 200 | RETCODE SQL_API |
| 201 | SQLFreeStmt ( |
| 202 | HSTMT hstmt, |
| 203 | UWORD fOption) |
| 204 | { |
| 205 | STMT_t FAR *pstmt = (STMT_t FAR *) hstmt; |
| 206 | STMT_t FAR *tpstmt; |
| 207 | DBC_t FAR *pdbc; |
| 208 | |
| 209 | HPROC hproc = SQL_NULL_HPROC; |
| 210 | RETCODE retcode; |
| 211 | |
| 212 | if (hstmt == SQL_NULL_HSTMT || pstmt->hdbc == SQL_NULL_HDBC) |
| 213 | { |
| 214 | return SQL_INVALID_HANDLE; |
| 215 | } |
| 216 | |
| 217 | pdbc = (DBC_t FAR *) (pstmt->hdbc); |
| 218 | |
| 219 | /* check option */ |
| 220 | switch (fOption) |
| 221 | { |
| 222 | case SQL_DROP: |
| 223 | case SQL_CLOSE: |
| 224 | case SQL_UNBIND: |
| 225 | case SQL_RESET_PARAMS: |
| 226 | break; |
| 227 | |
| 228 | default: |
| 229 | PUSHSQLERR (pstmt->herr, en_S1092); |
| 230 | return SQL_ERROR; |
| 231 | } |
| 232 | |
| 233 | /* check state */ |
| 234 | if (pstmt->state >= en_stmt_needdata || pstmt->asyn_on != en_NullProc) |
| 235 | { |
| 236 | PUSHSQLERR (pstmt->herr, en_S1010); |
| 237 | |
| 238 | return SQL_ERROR; |
| 239 | } |
| 240 | |
| 241 | hproc = SQL_NULL_HPROC; |
| 242 | |
| 243 | #if (ODBCVER >= 0x0300) |
| 244 | if (fOption == SQL_DROP) |
| 245 | { |
| 246 | hproc = _iodbcdm_getproc (pstmt->hdbc, en_FreeHandle); |
| 247 | |
| 248 | if (hproc) |
| 249 | { |
| 250 | CALL_DRIVER (pstmt->hdbc, retcode, hproc, en_FreeHandle, |
| 251 | (SQL_HANDLE_STMT, pstmt->dhstmt)) |
| 252 | } |
| 253 | } |
| 254 | #endif |
| 255 | |
| 256 | if (hproc == SQL_NULL_HPROC) |
| 257 | { |
| 258 | hproc = _iodbcdm_getproc (pstmt->hdbc, en_FreeStmt); |
| 259 | |
| 260 | if (hproc == SQL_NULL_HPROC) |
| 261 | { |
| 262 | PUSHSQLERR (pstmt->herr, en_IM001); |
| 263 | |
| 264 | return SQL_ERROR; |
| 265 | } |
| 266 | |
| 267 | CALL_DRIVER (pstmt->hdbc, retcode, hproc, en_FreeStmt, |
| 268 | (pstmt->dhstmt, fOption)) |
| 269 | } |
| 270 | |
| 271 | if (retcode != SQL_SUCCESS |
| 272 | && retcode != SQL_SUCCESS_WITH_INFO) |
| 273 | { |
| 274 | return retcode; |
| 275 | } |
| 276 | |
| 277 | /* state transition */ |
| 278 | switch (fOption) |
| 279 | { |
| 280 | case SQL_DROP: |
| 281 | /* delet this object (ignore return) */ |
| 282 | _iodbcdm_dropstmt (hstmt); |
| 283 | break; |
| 284 | |
| 285 | case SQL_CLOSE: |
| 286 | pstmt->cursor_state = en_stmt_cursor_no; |
| 287 | /* This means cursor name set by |
| 288 | * SQLSetCursorName() call will also |
| 289 | * be erased. |
| 290 | */ |
| 291 | |
| 292 | switch (pstmt->state) |
| 293 | { |
| 294 | case en_stmt_allocated: |
| 295 | case en_stmt_prepared: |
| 296 | break; |
| 297 | |
| 298 | case en_stmt_executed: |
| 299 | case en_stmt_cursoropen: |
| 300 | case en_stmt_fetched: |
| 301 | case en_stmt_xfetched: |
| 302 | if (pstmt->prep_state) |
| 303 | { |
| 304 | pstmt->state = |
| 305 | en_stmt_prepared; |
| 306 | } |
| 307 | else |
| 308 | { |
| 309 | pstmt->state = |
| 310 | en_stmt_allocated; |
| 311 | } |
| 312 | break; |
| 313 | |
| 314 | default: |
| 315 | break; |
| 316 | } |
| 317 | break; |
| 318 | |
| 319 | case SQL_UNBIND: |
| 320 | case SQL_RESET_PARAMS: |
| 321 | default: |
| 322 | break; |
| 323 | } |
| 324 | |
| 325 | return retcode; |
| 326 | } |
| 327 | |
| 328 | |
| 329 | RETCODE SQL_API |
| 330 | SQLSetStmtOption ( |
| 331 | HSTMT hstmt, |
| 332 | UWORD fOption, |
| 333 | UDWORD vParam) |
| 334 | { |
| 335 | STMT_t FAR *pstmt = (STMT_t FAR *) hstmt; |
| 336 | HPROC hproc; |
| 337 | int sqlstat = en_00000; |
| 338 | RETCODE retcode; |
| 339 | |
| 340 | if (hstmt == SQL_NULL_HSTMT || pstmt->hdbc == SQL_NULL_HDBC) |
| 341 | { |
| 342 | return SQL_INVALID_HANDLE; |
| 343 | } |
| 344 | |
| 345 | /* check option */ |
| 346 | if ( /* fOption < SQL_STMT_OPT_MIN || */ |
| 347 | fOption > SQL_STMT_OPT_MAX) |
| 348 | { |
| 349 | PUSHSQLERR (pstmt->herr, en_S1092); |
| 350 | |
| 351 | return SQL_ERROR; |
| 352 | } |
| 353 | |
| 354 | if (fOption == SQL_CONCURRENCY |
| 355 | || fOption == SQL_CURSOR_TYPE |
| 356 | || fOption == SQL_SIMULATE_CURSOR |
| 357 | || fOption == SQL_USE_BOOKMARKS) |
| 358 | { |
| 359 | if (pstmt->asyn_on != en_NullProc) |
| 360 | { |
| 361 | if (pstmt->prep_state) |
| 362 | { |
| 363 | sqlstat = en_S1011; |
| 364 | } |
| 365 | } |
| 366 | else |
| 367 | { |
| 368 | switch (pstmt->state) |
| 369 | { |
| 370 | case en_stmt_prepared: |
| 371 | sqlstat = en_S1011; |
| 372 | break; |
| 373 | |
| 374 | case en_stmt_executed: |
| 375 | case en_stmt_cursoropen: |
| 376 | case en_stmt_fetched: |
| 377 | case en_stmt_xfetched: |
| 378 | sqlstat = en_24000; |
| 379 | break; |
| 380 | |
| 381 | case en_stmt_needdata: |
| 382 | case en_stmt_mustput: |
| 383 | case en_stmt_canput: |
| 384 | if (pstmt->prep_state) |
| 385 | { |
| 386 | sqlstat = en_S1011; |
| 387 | } |
| 388 | break; |
| 389 | |
| 390 | default: |
| 391 | break; |
| 392 | } |
| 393 | } |
| 394 | } |
| 395 | else |
| 396 | { |
| 397 | if (pstmt->asyn_on != en_NullProc) |
| 398 | { |
| 399 | if (!pstmt->prep_state) |
| 400 | { |
| 401 | sqlstat = en_S1010; |
| 402 | } |
| 403 | } |
| 404 | else |
| 405 | { |
| 406 | if (pstmt->state >= en_stmt_needdata) |
| 407 | { |
| 408 | sqlstat = en_S1010; |
| 409 | } |
| 410 | } |
| 411 | } |
| 412 | |
| 413 | if (sqlstat != en_00000) |
| 414 | { |
| 415 | PUSHSQLERR (pstmt->herr, sqlstat); |
| 416 | |
| 417 | return SQL_ERROR; |
| 418 | } |
| 419 | |
| 420 | hproc = _iodbcdm_getproc (pstmt->hdbc, en_SetStmtOption); |
| 421 | |
| 422 | if (hproc == SQL_NULL_HPROC) |
| 423 | { |
| 424 | PUSHSQLERR (pstmt->herr, en_IM001); |
| 425 | |
| 426 | return SQL_ERROR; |
| 427 | } |
| 428 | |
| 429 | CALL_DRIVER (pstmt->hdbc, retcode, hproc, en_SetStmtOption, |
| 430 | (pstmt->dhstmt, fOption, vParam)) |
| 431 | |
| 432 | return retcode; |
| 433 | } |
| 434 | |
| 435 | |
| 436 | RETCODE SQL_API |
| 437 | SQLGetStmtOption ( |
| 438 | HSTMT hstmt, |
| 439 | UWORD fOption, |
| 440 | PTR pvParam) |
| 441 | { |
| 442 | STMT_t FAR *pstmt = (STMT_t *) hstmt; |
| 443 | HPROC hproc; |
| 444 | int sqlstat = en_00000; |
| 445 | RETCODE retcode; |
| 446 | |
| 447 | if (hstmt == SQL_NULL_HSTMT || pstmt->hdbc == SQL_NULL_HDBC) |
| 448 | { |
| 449 | return SQL_INVALID_HANDLE; |
| 450 | } |
| 451 | |
| 452 | /* check option */ |
| 453 | if ( /* fOption < SQL_STMT_OPT_MIN || */ |
| 454 | fOption > SQL_STMT_OPT_MAX) |
| 455 | { |
| 456 | PUSHSQLERR (pstmt->herr, en_S1092); |
| 457 | |
| 458 | return SQL_ERROR; |
| 459 | } |
| 460 | |
| 461 | /* check state */ |
| 462 | if (pstmt->state >= en_stmt_needdata |
| 463 | || pstmt->asyn_on != en_NullProc) |
| 464 | { |
| 465 | sqlstat = en_S1010; |
| 466 | } |
| 467 | else |
| 468 | { |
| 469 | switch (pstmt->state) |
| 470 | { |
| 471 | case en_stmt_allocated: |
| 472 | case en_stmt_prepared: |
| 473 | case en_stmt_executed: |
| 474 | case en_stmt_cursoropen: |
| 475 | if (fOption == SQL_ROW_NUMBER || fOption == SQL_GET_BOOKMARK) |
| 476 | { |
| 477 | sqlstat = en_24000; |
| 478 | } |
| 479 | break; |
| 480 | |
| 481 | default: |
| 482 | break; |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | if (sqlstat != en_00000) |
| 487 | { |
| 488 | PUSHSQLERR (pstmt->herr, sqlstat); |
| 489 | |
| 490 | return SQL_ERROR; |
| 491 | } |
| 492 | |
| 493 | hproc = _iodbcdm_getproc (pstmt->hdbc, en_GetStmtOption); |
| 494 | |
| 495 | if (hproc == SQL_NULL_HPROC) |
| 496 | { |
| 497 | PUSHSQLERR (pstmt->herr, en_IM001); |
| 498 | return SQL_ERROR; |
| 499 | } |
| 500 | |
| 501 | CALL_DRIVER (pstmt->hdbc, retcode, hproc, en_GetStmtOption, |
| 502 | (pstmt->dhstmt, fOption, pvParam)) |
| 503 | |
| 504 | return retcode; |
| 505 | } |
| 506 | |
| 507 | |
| 508 | RETCODE SQL_API |
| 509 | SQLCancel (HSTMT hstmt) |
| 510 | { |
| 511 | STMT_t FAR *pstmt = (STMT_t FAR *) hstmt; |
| 512 | HPROC hproc; |
| 513 | RETCODE retcode; |
| 514 | |
| 515 | if (hstmt == SQL_NULL_HSTMT || pstmt->hdbc == SQL_NULL_HDBC) |
| 516 | { |
| 517 | return SQL_INVALID_HANDLE; |
| 518 | } |
| 519 | |
| 520 | /* check argument */ |
| 521 | /* check state */ |
| 522 | |
| 523 | /* call driver */ |
| 524 | hproc = _iodbcdm_getproc (pstmt->hdbc, en_Cancel); |
| 525 | |
| 526 | if (hproc == SQL_NULL_HPROC) |
| 527 | { |
| 528 | PUSHSQLERR (pstmt->herr, en_IM001); |
| 529 | |
| 530 | return SQL_ERROR; |
| 531 | } |
| 532 | |
| 533 | CALL_DRIVER (pstmt->hdbc, retcode, hproc, en_Cancel, |
| 534 | (pstmt->dhstmt)) |
| 535 | |
| 536 | /* state transition */ |
| 537 | if (retcode != SQL_SUCCESS && retcode != SQL_SUCCESS_WITH_INFO) |
| 538 | { |
| 539 | return retcode; |
| 540 | } |
| 541 | |
| 542 | switch (pstmt->state) |
| 543 | { |
| 544 | case en_stmt_allocated: |
| 545 | case en_stmt_prepared: |
| 546 | break; |
| 547 | |
| 548 | case en_stmt_executed: |
| 549 | if (pstmt->prep_state) |
| 550 | { |
| 551 | pstmt->state = en_stmt_prepared; |
| 552 | } |
| 553 | else |
| 554 | { |
| 555 | pstmt->state = en_stmt_allocated; |
| 556 | } |
| 557 | break; |
| 558 | |
| 559 | case en_stmt_cursoropen: |
| 560 | case en_stmt_fetched: |
| 561 | case en_stmt_xfetched: |
| 562 | if (pstmt->prep_state) |
| 563 | { |
| 564 | pstmt->state = en_stmt_prepared; |
| 565 | } |
| 566 | else |
| 567 | { |
| 568 | pstmt->state = en_stmt_allocated; |
| 569 | } |
| 570 | break; |
| 571 | |
| 572 | case en_stmt_needdata: |
| 573 | case en_stmt_mustput: |
| 574 | case en_stmt_canput: |
| 575 | switch (pstmt->need_on) |
| 576 | { |
| 577 | case en_ExecDirect: |
| 578 | pstmt->state = en_stmt_allocated; |
| 579 | break; |
| 580 | |
| 581 | case en_Execute: |
| 582 | pstmt->state = en_stmt_prepared; |
| 583 | break; |
| 584 | |
| 585 | case en_SetPos: |
| 586 | pstmt->state = en_stmt_xfetched; |
| 587 | break; |
| 588 | |
| 589 | default: |
| 590 | break; |
| 591 | } |
| 592 | pstmt->need_on = en_NullProc; |
| 593 | break; |
| 594 | |
| 595 | default: |
| 596 | break; |
| 597 | } |
| 598 | |
| 599 | return retcode; |
| 600 | } |