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Overview
Comment: | Add documentation and test cases for sqlite3ota_create_vfs(). Also code to detect errors in zipvfs/ota setup. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | ota-update-no-pager_ota_mode |
Files: | files | file ages | folders |
SHA1: |
e729668168f00325459bc2e9b515aa95 |
User & Date: | dan 2015-02-10 17:08:17.934 |
Context
2015-02-10
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20:00 | Further tweaks to work with zipvfs. (check-in: 0f152416be user: dan tags: ota-update-no-pager_ota_mode) | |
17:08 | Add documentation and test cases for sqlite3ota_create_vfs(). Also code to detect errors in zipvfs/ota setup. (check-in: e729668168 user: dan tags: ota-update-no-pager_ota_mode) | |
2015-02-09
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20:07 | Add the sqlite3ota_create_vfs() and sqlite3ota_destroy_vfs() functions. (check-in: 96443ecb69 user: dan tags: ota-update-no-pager_ota_mode) | |
Changes
Changes to ext/ota/ota1.test.
︙ | ︙ | |||
102 103 104 105 106 107 108 | set rc [ota step] ota close if {$rc != "SQLITE_OK"} break } set rc } | > > > > > > > > > > > | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | > > > | 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 | set rc [ota step] ota close if {$rc != "SQLITE_OK"} break } set rc } foreach {tn3 create_vfs destroy_vfs} { 1 {} {} 2 { sqlite3ota_create_vfs -default myota "" } { sqlite3ota_destroy_vfs myota } } { eval $create_vfs foreach {tn2 cmd} {1 run_ota 2 step_ota 3 step_ota_uri} { foreach {tn schema} { 1 { CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c); } 2 { CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c); CREATE INDEX i1 ON t1(b); } 3 { CREATE TABLE t1(a PRIMARY KEY, b, c) WITHOUT ROWID; } 4 { CREATE TABLE t1(a PRIMARY KEY, b, c) WITHOUT ROWID; CREATE INDEX i1 ON t1(b); } 5 { CREATE TABLE t1(a, b, c, PRIMARY KEY(a, c)) WITHOUT ROWID; CREATE INDEX i1 ON t1(b); } 6 { CREATE TABLE t1(a, b, c, PRIMARY KEY(c)) WITHOUT ROWID; CREATE INDEX i1 ON t1(b, a); } 7 { CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c); CREATE INDEX i1 ON t1(b, c); CREATE INDEX i2 ON t1(c, b); CREATE INDEX i3 ON t1(a, b, c, a, b, c); } 8 { CREATE TABLE t1(a PRIMARY KEY, b, c); CREATE INDEX i1 ON t1(b, c); CREATE INDEX i2 ON t1(c, b); CREATE INDEX i3 ON t1(a, b, c, a, b, c); } 9 { CREATE TABLE t1(a, b, c, PRIMARY KEY(a, c)); CREATE INDEX i1 ON t1(b); } 10 { CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c); CREATE INDEX i1 ON t1(b DESC); } 11 { CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c); CREATE INDEX i1 ON t1(b DESC, a ASC, c DESC); } 12 { CREATE TABLE t1(a INT PRIMARY KEY DESC, b, c) WITHOUT ROWID; } 13 { CREATE TABLE t1(a INT, b, c, PRIMARY KEY(a DESC)) WITHOUT ROWID; } 14 { CREATE TABLE t1(a, b, c, PRIMARY KEY(a DESC, c)) WITHOUT ROWID; CREATE INDEX i1 ON t1(b); } 15 { CREATE TABLE t1(a, b, c, PRIMARY KEY(a, c DESC)) WITHOUT ROWID; CREATE INDEX i1 ON t1(b); } 16 { CREATE TABLE t1(a, b, c, PRIMARY KEY(c DESC, a)) WITHOUT ROWID; CREATE INDEX i1 ON t1(b DESC, c, a); } } { reset_db execsql $schema do_test $tn3.1.$tn2.$tn.1 { create_ota1 ota.db breakpoint $cmd test.db ota.db } {SQLITE_DONE} do_execsql_test $tn3.1.$tn2.$tn.2 { SELECT * FROM t1 ORDER BY a ASC } { 1 2 3 2 two three 3 {} 8.2 } do_execsql_test $tn3.1.$tn2.$tn.3 { SELECT * FROM t1 ORDER BY b ASC } { 3 {} 8.2 1 2 3 2 two three } do_execsql_test $tn3.1.$tn2.$tn.4 { SELECT * FROM t1 ORDER BY c ASC } { 1 2 3 3 {} 8.2 2 two three } do_execsql_test $tn3.1.$tn2.$tn.5 { PRAGMA integrity_check } ok } } #------------------------------------------------------------------------- # Check that an OTA cannot be applied to a table that has no PK. # # UPDATE: At one point OTA required that all tables featured either # explicit IPK columns or were declared WITHOUT ROWID. This has been # relaxed so that external PRIMARY KEYs on tables with automatic rowids # are now allowed. # # UPDATE 2: Tables without any PRIMARY KEY declaration are now allowed. # However the input table must feature an "ota_rowid" column. # reset_db create_ota1 ota.db do_execsql_test $tn3.2.1 { CREATE TABLE t1(a, b, c) } do_test $tn3.2.2 { sqlite3ota ota test.db ota.db ota step } {SQLITE_ERROR} do_test $tn3.2.3 { list [catch { ota close } msg] $msg } {1 {SQLITE_ERROR - table data_t1 requires ota_rowid column}} reset_db do_execsql_test $tn3.2.4 { CREATE TABLE t1(a PRIMARY KEY, b, c) } do_test $tn3.2.5 { sqlite3ota ota test.db ota.db ota step } {SQLITE_OK} do_test $tn3.2.6 { list [catch { ota close } msg] $msg } {0 SQLITE_OK} #------------------------------------------------------------------------- # Check that if a UNIQUE constraint is violated the current and all # subsequent [ota step] calls return SQLITE_CONSTRAINT. And that the OTA # transaction is rolled back by the [ota close] that deletes the ota # handle. # foreach {tn errcode errmsg schema} { 1 SQLITE_CONSTRAINT "UNIQUE constraint failed: t1.a" { CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c); INSERT INTO t1 VALUES(3, 2, 1); } 2 SQLITE_CONSTRAINT "UNIQUE constraint failed: t1.c" { CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c UNIQUE); INSERT INTO t1 VALUES(4, 2, 'three'); } 3 SQLITE_CONSTRAINT "UNIQUE constraint failed: t1.a" { CREATE TABLE t1(a PRIMARY KEY, b, c); INSERT INTO t1 VALUES(3, 2, 1); } 4 SQLITE_CONSTRAINT "UNIQUE constraint failed: t1.c" { CREATE TABLE t1(a PRIMARY KEY, b, c UNIQUE); INSERT INTO t1 VALUES(4, 2, 'three'); } } { reset_db execsql $schema set cksum [dbcksum db main] do_test $tn3.3.$tn.1 { create_ota1 ota.db sqlite3ota ota test.db ota.db while {[set res [ota step]]=="SQLITE_OK"} {} set res } $errcode do_test $tn3.3.$tn.2 { ota step } $errcode do_test $tn3.3.$tn.3 { list [catch { ota close } msg] $msg } [list 1 "$errcode - $errmsg"] do_test $tn3.3.$tn.4 { dbcksum db main } $cksum } #------------------------------------------------------------------------- # foreach {tn2 cmd} {1 run_ota 2 step_ota} { foreach {tn schema} { 1 { CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c); } 2 { CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c); CREATE INDEX i1 ON t1(b); } 3 { CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c); CREATE INDEX i1 ON t1(b); CREATE INDEX i2 ON t1(c, b); CREATE INDEX i3 ON t1(c, b, c); } 4 { CREATE TABLE t1(a INT PRIMARY KEY, b, c) WITHOUT ROWID; CREATE INDEX i1 ON t1(b); CREATE INDEX i2 ON t1(c, b); CREATE INDEX i3 ON t1(c, b, c); } 5 { CREATE TABLE t1(a INT PRIMARY KEY, b, c); CREATE INDEX i1 ON t1(b); CREATE INDEX i2 ON t1(c, b); CREATE INDEX i3 ON t1(c, b, c); } 6 { CREATE TABLE t1(a INT PRIMARY KEY DESC, b, c); CREATE INDEX i1 ON t1(b DESC); CREATE INDEX i2 ON t1(c, b); CREATE INDEX i3 ON t1(c DESC, b, c); } 7 { CREATE TABLE t1(a INT PRIMARY KEY DESC, b, c) WITHOUT ROWID; CREATE INDEX i1 ON t1(b); CREATE INDEX i2 ON t1(c, b); CREATE INDEX i3 ON t1(c, b, c); } } { reset_db execsql $schema execsql { INSERT INTO t1 VALUES(2, 'hello', 'world'); INSERT INTO t1 VALUES(4, 'hello', 'planet'); INSERT INTO t1 VALUES(6, 'hello', 'xyz'); } do_test $tn3.4.$tn2.$tn.1 { create_ota4 ota.db $cmd test.db ota.db } {SQLITE_DONE} do_execsql_test $tn3.4.$tn2.$tn.2 { SELECT * FROM t1 ORDER BY a ASC; } { 1 2 3 3 8 9 6 hello xyz } do_execsql_test $tn3.4.$tn2.$tn.3 { PRAGMA integrity_check } ok } } #------------------------------------------------------------------------- # foreach {tn2 cmd} {1 run_ota 2 step_ota} { foreach {tn schema} { 1 { CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, d); } 2 { CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, d); CREATE INDEX i1 ON t1(d); CREATE INDEX i2 ON t1(d, c); CREATE INDEX i3 ON t1(d, c, b); CREATE INDEX i4 ON t1(b); CREATE INDEX i5 ON t1(c); CREATE INDEX i6 ON t1(c, b); } 3 { CREATE TABLE t1(a PRIMARY KEY, b, c, d) WITHOUT ROWID; CREATE INDEX i1 ON t1(d); CREATE INDEX i2 ON t1(d, c); CREATE INDEX i3 ON t1(d, c, b); CREATE INDEX i4 ON t1(b); CREATE INDEX i5 ON t1(c); CREATE INDEX i6 ON t1(c, b); } 4 { CREATE TABLE t1(a PRIMARY KEY, b, c, d); CREATE INDEX i1 ON t1(d); CREATE INDEX i2 ON t1(d, c); CREATE INDEX i3 ON t1(d, c, b); CREATE INDEX i4 ON t1(b); CREATE INDEX i5 ON t1(c); CREATE INDEX i6 ON t1(c, b); } } { reset_db execsql $schema execsql { INSERT INTO t1 VALUES(1, 2, 3, 4); INSERT INTO t1 VALUES(2, 5, 6, 7); INSERT INTO t1 VALUES(3, 8, 9, 10); } do_test $tn3.5.$tn2.$tn.1 { create_ota5 ota.db $cmd test.db ota.db } {SQLITE_DONE} do_execsql_test $tn3.5.$tn2.$tn.2 { SELECT * FROM t1 ORDER BY a ASC; } { 1 2 3 5 2 5 10 5 3 11 9 10 } do_execsql_test $tn3.5.$tn2.$tn.3 { PRAGMA integrity_check } ok } } #------------------------------------------------------------------------- # Test some error cases: # # * A virtual table with no ota_rowid column. # * A no-PK table with no ota_rowid column. # * A PK table with an ota_rowid column. # ifcapable fts3 { foreach {tn schema error} { 1 { CREATE TABLE t1(a, b); CREATE TABLE ota.data_t1(a, b, ota_control); } {SQLITE_ERROR - table data_t1 requires ota_rowid column} 2 { CREATE VIRTUAL TABLE t1 USING fts4(a, b); CREATE TABLE ota.data_t1(a, b, ota_control); } {SQLITE_ERROR - table data_t1 requires ota_rowid column} 3 { CREATE TABLE t1(a PRIMARY KEY, b); CREATE TABLE ota.data_t1(a, b, ota_rowid, ota_control); } {SQLITE_ERROR - table data_t1 may not have ota_rowid column} 4 { CREATE TABLE t1(a INTEGER PRIMARY KEY, b); CREATE TABLE ota.data_t1(a, b, ota_rowid, ota_control); } {SQLITE_ERROR - table data_t1 may not have ota_rowid column} 5 { CREATE TABLE t1(a, b PRIMARY KEY) WITHOUT ROWID; CREATE TABLE ota.data_t1(a, b, ota_rowid, ota_control); } {SQLITE_ERROR - table data_t1 may not have ota_rowid column} } { reset_db forcedelete ota.db execsql { ATTACH 'ota.db' AS ota } execsql $schema do_test $tn3.6.$tn { list [catch { run_ota test.db ota.db } msg] $msg } [list 1 $error] } } eval $destroy_vfs } finish_test |
Changes to ext/ota/sqlite3ota.c.
︙ | ︙ | |||
2346 2347 2348 2349 2350 2351 2352 2353 2354 | } /* ** File control method. For custom operations on an otaVfs-file. */ static int otaVfsFileControl(sqlite3_file *pFile, int op, void *pArg){ ota_file *p = (ota_file *)pFile; if( op==SQLITE_FCNTL_OTA ){ sqlite3ota *pOta = (sqlite3ota*)pArg; | > > > > > > > > > > > > > > > > > > | | > > > | | | 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 | } /* ** File control method. For custom operations on an otaVfs-file. */ static int otaVfsFileControl(sqlite3_file *pFile, int op, void *pArg){ ota_file *p = (ota_file *)pFile; int (*xControl)(sqlite3_file*,int,void*) = p->pReal->pMethods->xFileControl; if( op==SQLITE_FCNTL_OTA ){ int rc; sqlite3ota *pOta = (sqlite3ota*)pArg; /* First try to find another OTA vfs lower down in the vfs stack. If ** one is found, this vfs will operate in pass-through mode. The lower ** level vfs will do the special OTA handling. */ rc = xControl(p->pReal, op, pArg); if( rc==SQLITE_NOTFOUND ){ /* Now search for a zipvfs instance lower down in the VFS stack. If ** one is found, this is an error. */ void *dummy = 0; rc = xControl(p->pReal, SQLITE_FCNTL_ZIPVFS_PAGER, &dummy); if( rc==SQLITE_OK ){ rc = SQLITE_ERROR; pOta->zErrmsg = sqlite3_mprintf("ota/zipvfs setup error"); }else if( rc==SQLITE_NOTFOUND ){ pOta->pTargetFd = p; p->pOta = pOta; rc = SQLITE_OK; } } return rc; } return xControl(p->pReal, op, pArg); } /* ** Return the sector-size in bytes for an otaVfs-file. */ static int otaVfsSectorSize(sqlite3_file *pFile){ ota_file *p = (ota_file *)pFile; |
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2892 2893 2894 2895 2896 2897 2898 2899 2900 | pOta = sqlite3ota_open(zTarget, zOta); Tcl_CreateObjCommand(interp, zCmd, test_sqlite3ota_cmd, (ClientData)pOta, 0); Tcl_SetObjResult(interp, objv[1]); return TCL_OK; } int SqliteOta_Init(Tcl_Interp *interp){ | > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | > > > > > > > | 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 | pOta = sqlite3ota_open(zTarget, zOta); Tcl_CreateObjCommand(interp, zCmd, test_sqlite3ota_cmd, (ClientData)pOta, 0); Tcl_SetObjResult(interp, objv[1]); return TCL_OK; } /* ** Tclcmd: sqlite3ota_create_vfs ?-default? NAME PARENT */ static int test_sqlite3ota_create_vfs( ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[] ){ const char *zName; const char *zParent; int rc; if( objc!=3 && objc!=4 ){ Tcl_WrongNumArgs(interp, 1, objv, "?-default? NAME PARENT"); return TCL_ERROR; } zName = Tcl_GetString(objv[objc-2]); zParent = Tcl_GetString(objv[objc-1]); if( zParent[0]=='\0' ) zParent = 0; rc = sqlite3ota_create_vfs(zName, zParent); if( rc!=SQLITE_OK ){ Tcl_SetObjResult(interp, Tcl_NewStringObj(sqlite3ErrName(rc), -1)); return TCL_ERROR; }else if( objc==4 ){ sqlite3_vfs *pVfs = sqlite3_vfs_find(zName); sqlite3_vfs_register(pVfs, 1); } Tcl_ResetResult(interp); return TCL_OK; } /* ** Tclcmd: sqlite3ota_destroy_vfs NAME */ static int test_sqlite3ota_destroy_vfs( ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[] ){ const char *zName; if( objc!=2 ){ Tcl_WrongNumArgs(interp, 1, objv, "NAME"); return TCL_ERROR; } zName = Tcl_GetString(objv[1]); sqlite3ota_destroy_vfs(zName); return TCL_OK; } int SqliteOta_Init(Tcl_Interp *interp){ static struct { char *zName; Tcl_ObjCmdProc *xProc; } aObjCmd[] = { { "sqlite3ota", test_sqlite3ota }, { "sqlite3ota_create_vfs", test_sqlite3ota_create_vfs }, { "sqlite3ota_destroy_vfs", test_sqlite3ota_destroy_vfs }, }; int i; for(i=0; i<sizeof(aObjCmd)/sizeof(aObjCmd[0]); i++){ Tcl_CreateObjCommand(interp, aObjCmd[i].zName, aObjCmd[i].xProc, 0, 0); } return TCL_OK; } #endif /* ifdef SQLITE_TEST */ #else /* !SQLITE_CORE || SQLITE_ENABLE_OTA */ # ifdef SQLITE_TEST #include <tcl.h> int SqliteOta_Init(Tcl_Interp *interp){ return TCL_OK; } # endif #endif |
Changes to ext/ota/sqlite3ota.h.
︙ | ︙ | |||
233 234 235 236 237 238 239 240 241 242 243 244 245 246 | /* ** Open an OTA handle. ** ** Argument zTarget is the path to the target database. Argument zOta is ** the path to the OTA database. Each call to this function must be matched ** by a call to sqlite3ota_close(). */ sqlite3ota *sqlite3ota_open(const char *zTarget, const char *zOta); /* ** Obtain the underlying database handle used by the OTA extension. ** ** The only argument passed to this function must be a valid, open, OTA | > > > > > > > > > | 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 | /* ** Open an OTA handle. ** ** Argument zTarget is the path to the target database. Argument zOta is ** the path to the OTA database. Each call to this function must be matched ** by a call to sqlite3ota_close(). ** ** By default, OTA uses the default VFS to access the files on disk. To ** use a VFS other than the default, an SQLite "file:" URI containing a ** "vfs=..." option may be passed as the zTarget option. ** ** IMPORTANT NOTE FOR ZIPVFS USERS: The OTA extension works with all of ** SQLite's built-in VFSs, including the multiplexor VFS. However it does ** not work out of the box with zipvfs. Refer to the comment describing ** the zipvfs_create_vfs() API below for details on using OTA with zipvfs. */ sqlite3ota *sqlite3ota_open(const char *zTarget, const char *zOta); /* ** Obtain the underlying database handle used by the OTA extension. ** ** The only argument passed to this function must be a valid, open, OTA |
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272 273 274 275 276 277 278 | ** that immediately return the same value. */ int sqlite3ota_step(sqlite3ota *pOta); /* ** Close an OTA handle. ** | | | | 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 | ** that immediately return the same value. */ int sqlite3ota_step(sqlite3ota *pOta); /* ** Close an OTA handle. ** ** If the OTA update has been completely applied, commit it to the target ** database. Otherwise, assuming no error has occurred, save the current ** state of the OTA update appliation to the OTA database. ** ** If an error has already occurred as part of an sqlite3ota_step() ** or sqlite3ota_open() call, or if one occurs within this function, an ** SQLite error code is returned. Additionally, *pzErrmsg may be set to ** point to a buffer containing a utf-8 formatted English language error ** message. It is the responsibility of the caller to eventually free any |
︙ | ︙ | |||
297 298 299 300 301 302 303 | ** Return the total number of key-value operations (inserts, deletes or ** updates) that have been performed on the target database since the ** current OTA update was started. */ sqlite3_int64 sqlite3ota_progress(sqlite3ota *pOta); /* | > > > > > | > | > > > > > > > > > > > > > > > > > > > > > > > | | | 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 | ** Return the total number of key-value operations (inserts, deletes or ** updates) that have been performed on the target database since the ** current OTA update was started. */ sqlite3_int64 sqlite3ota_progress(sqlite3ota *pOta); /* ** Part of the OTA implementation uses a custom VFS object. Usually, this ** object is created and deleted automatically by OTA. ** ** The exception is for applications that also use zipvfs. In this case, ** the custom VFS must be explicitly created by the user before the OTA ** handle is opened. The OTA VFS should be installed so that the zipvfs ** VFS uses the OTA VFS, which in turn uses any other VFS layers in use ** (for example multiplexor) to access the file-system. For example, ** to assemble an OTA enabled VFS stack that uses both zipvfs and ** multiplexor (error checking omitted): ** ** // Create a VFS named "multiplexor" (not the default). ** sqlite3_multiplex_initialize(zVfsName, 0); ** ** // Create an ota VFS named "ota" that uses multiplexor. ** sqlite3ota_create_vfs("ota", "multiplexor"); ** ** // Create a zipvfs VFS named "zipvfs" that uses ota. ** zipvfs_create_vfs_v3("zipvfs", "ota", 0, xCompressorAlgorithmDetector); ** ** // Make zipvfs the default VFS. ** sqlite3_vfs_register(sqlite3_vfs_find("zipvfs"), 1); ** ** Because the default VFS created above includes a OTA functionality, it ** may be used by OTA clients. Attempting to use OTA with a zipvfs VFS stack ** that does not include the OTA layer results in an error. ** ** The overhead of adding the "ota" VFS to the system is negligible for ** non-OTA users. There is no harm in an application accessing the ** file-system via "ota" all the time, even if it only uses OTA functionality ** occasionally. */ int sqlite3ota_create_vfs(const char *zName, const char *zParent); /* ** Deregister and destroy an OTA vfs created by an earlier call to ** sqlite3ota_create_vfs(). ** ** VFS objects are not reference counted. If a VFS object is destroyed ** before all database handles that use it have been closed, the results ** are undefined. */ void sqlite3ota_destroy_vfs(const char *zName); #endif /* _SQLITE3OTA_H */ |