1 /* 2 ** 2003 September 6 3 ** 4 ** The author disclaims copyright to this source code. In place of 5 ** a legal notice, here is a blessing: 6 ** 7 ** May you do good and not evil. 8 ** May you find forgiveness for yourself and forgive others. 9 ** May you share freely, never taking more than you give. 10 ** 11 ************************************************************************* 12 ** This is the header file for information that is private to the 13 ** VDBE. This information used to all be at the top of the single 14 ** source code file "vdbe.c". When that file became too big (over 15 ** 6000 lines long) it was split up into several smaller files and 16 ** this header information was factored out. 17 */ 18 #ifndef SQLITE_VDBEINT_H 19 #define SQLITE_VDBEINT_H 20 21 /* 22 ** The maximum number of times that a statement will try to reparse 23 ** itself before giving up and returning SQLITE_SCHEMA. 24 */ 25 #ifndef SQLITE_MAX_SCHEMA_RETRY 26 # define SQLITE_MAX_SCHEMA_RETRY 50 27 #endif 28 29 /* 30 ** VDBE_DISPLAY_P4 is true or false depending on whether or not the 31 ** "explain" P4 display logic is enabled. 32 */ 33 #if !defined(SQLITE_OMIT_EXPLAIN) || !defined(NDEBUG) \ 34 || defined(VDBE_PROFILE) || defined(SQLITE_DEBUG) 35 # define VDBE_DISPLAY_P4 1 36 #else 37 # define VDBE_DISPLAY_P4 0 38 #endif 39 40 /* 41 ** SQL is translated into a sequence of instructions to be 42 ** executed by a virtual machine. Each instruction is an instance 43 ** of the following structure. 44 */ 45 typedef struct VdbeOp Op; 46 47 /* 48 ** Boolean values 49 */ 50 typedef unsigned Bool; 51 52 /* Opaque type used by code in vdbesort.c */ 53 typedef struct VdbeSorter VdbeSorter; 54 55 /* Elements of the linked list at Vdbe.pAuxData */ 56 typedef struct AuxData AuxData; 57 58 /* Types of VDBE cursors */ 59 #define CURTYPE_BTREE 0 60 #define CURTYPE_SORTER 1 61 #define CURTYPE_VTAB 2 62 #define CURTYPE_PSEUDO 3 63 64 /* 65 ** A VdbeCursor is an superclass (a wrapper) for various cursor objects: 66 ** 67 ** * A b-tree cursor 68 ** - In the main database or in an ephemeral database 69 ** - On either an index or a table 70 ** * A sorter 71 ** * A virtual table 72 ** * A one-row "pseudotable" stored in a single register 73 */ 74 typedef struct VdbeCursor VdbeCursor; 75 struct VdbeCursor { 76 u8 eCurType; /* One of the CURTYPE_* values above */ 77 i8 iDb; /* Index of cursor database in db->aDb[] (or -1) */ 78 u8 nullRow; /* True if pointing to a row with no data */ 79 u8 deferredMoveto; /* A call to sqlite3BtreeMoveto() is needed */ 80 u8 isTable; /* True for rowid tables. False for indexes */ 81 #ifdef SQLITE_DEBUG 82 u8 seekOp; /* Most recent seek operation on this cursor */ 83 u8 wrFlag; /* The wrFlag argument to sqlite3BtreeCursor() */ 84 #endif 85 Bool isEphemeral:1; /* True for an ephemeral table */ 86 Bool useRandomRowid:1; /* Generate new record numbers semi-randomly */ 87 Bool isOrdered:1; /* True if the table is not BTREE_UNORDERED */ 88 Btree *pBtx; /* Separate file holding temporary table */ 89 i64 seqCount; /* Sequence counter */ 90 int *aAltMap; /* Mapping from table to index column numbers */ 91 92 /* Cached OP_Column parse information is only valid if cacheStatus matches 93 ** Vdbe.cacheCtr. Vdbe.cacheCtr will never take on the value of 94 ** CACHE_STALE (0) and so setting cacheStatus=CACHE_STALE guarantees that 95 ** the cache is out of date. */ 96 u32 cacheStatus; /* Cache is valid if this matches Vdbe.cacheCtr */ 97 int seekResult; /* Result of previous sqlite3BtreeMoveto() or 0 98 ** if there have been no prior seeks on the cursor. */ 99 /* NB: seekResult does not distinguish between "no seeks have ever occurred 100 ** on this cursor" and "the most recent seek was an exact match". */ 101 102 /* When a new VdbeCursor is allocated, only the fields above are zeroed. 103 ** The fields that follow are uninitialized, and must be individually 104 ** initialized prior to first use. */ 105 VdbeCursor *pAltCursor; /* Associated index cursor from which to read */ 106 union { 107 BtCursor *pCursor; /* CURTYPE_BTREE. Btree cursor */ 108 sqlite3_vtab_cursor *pVCur; /* CURTYPE_VTAB. Vtab cursor */ 109 int pseudoTableReg; /* CURTYPE_PSEUDO. Reg holding content. */ 110 VdbeSorter *pSorter; /* CURTYPE_SORTER. Sorter object */ 111 } uc; 112 KeyInfo *pKeyInfo; /* Info about index keys needed by index cursors */ 113 u32 iHdrOffset; /* Offset to next unparsed byte of the header */ 114 Pgno pgnoRoot; /* Root page of the open btree cursor */ 115 i16 nField; /* Number of fields in the header */ 116 u16 nHdrParsed; /* Number of header fields parsed so far */ 117 i64 movetoTarget; /* Argument to the deferred sqlite3BtreeMoveto() */ 118 u32 *aOffset; /* Pointer to aType[nField] */ 119 const u8 *aRow; /* Data for the current row, if all on one page */ 120 u32 payloadSize; /* Total number of bytes in the record */ 121 u32 szRow; /* Byte available in aRow */ 122 #ifdef SQLITE_ENABLE_COLUMN_USED_MASK 123 u64 maskUsed; /* Mask of columns used by this cursor */ 124 #endif 125 126 /* 2*nField extra array elements allocated for aType[], beyond the one 127 ** static element declared in the structure. nField total array slots for 128 ** aType[] and nField+1 array slots for aOffset[] */ 129 u32 aType[1]; /* Type values record decode. MUST BE LAST */ 130 }; 131 132 133 /* 134 ** A value for VdbeCursor.cacheStatus that means the cache is always invalid. 135 */ 136 #define CACHE_STALE 0 137 138 /* 139 ** When a sub-program is executed (OP_Program), a structure of this type 140 ** is allocated to store the current value of the program counter, as 141 ** well as the current memory cell array and various other frame specific 142 ** values stored in the Vdbe struct. When the sub-program is finished, 143 ** these values are copied back to the Vdbe from the VdbeFrame structure, 144 ** restoring the state of the VM to as it was before the sub-program 145 ** began executing. 146 ** 147 ** The memory for a VdbeFrame object is allocated and managed by a memory 148 ** cell in the parent (calling) frame. When the memory cell is deleted or 149 ** overwritten, the VdbeFrame object is not freed immediately. Instead, it 150 ** is linked into the Vdbe.pDelFrame list. The contents of the Vdbe.pDelFrame 151 ** list is deleted when the VM is reset in VdbeHalt(). The reason for doing 152 ** this instead of deleting the VdbeFrame immediately is to avoid recursive 153 ** calls to sqlite3VdbeMemRelease() when the memory cells belonging to the 154 ** child frame are released. 155 ** 156 ** The currently executing frame is stored in Vdbe.pFrame. Vdbe.pFrame is 157 ** set to NULL if the currently executing frame is the main program. 158 */ 159 typedef struct VdbeFrame VdbeFrame; 160 struct VdbeFrame { 161 Vdbe *v; /* VM this frame belongs to */ 162 VdbeFrame *pParent; /* Parent of this frame, or NULL if parent is main */ 163 Op *aOp; /* Program instructions for parent frame */ 164 i64 *anExec; /* Event counters from parent frame */ 165 Mem *aMem; /* Array of memory cells for parent frame */ 166 VdbeCursor **apCsr; /* Array of Vdbe cursors for parent frame */ 167 u8 *aOnce; /* Bitmask used by OP_Once */ 168 void *token; /* Copy of SubProgram.token */ 169 i64 lastRowid; /* Last insert rowid (sqlite3.lastRowid) */ 170 AuxData *pAuxData; /* Linked list of auxdata allocations */ 171 int nCursor; /* Number of entries in apCsr */ 172 int pc; /* Program Counter in parent (calling) frame */ 173 int nOp; /* Size of aOp array */ 174 int nMem; /* Number of entries in aMem */ 175 int nChildMem; /* Number of memory cells for child frame */ 176 int nChildCsr; /* Number of cursors for child frame */ 177 int nChange; /* Statement changes (Vdbe.nChange) */ 178 int nDbChange; /* Value of db->nChange */ 179 }; 180 181 #define VdbeFrameMem(p) ((Mem *)&((u8 *)p)[ROUND8(sizeof(VdbeFrame))]) 182 183 /* 184 ** Internally, the vdbe manipulates nearly all SQL values as Mem 185 ** structures. Each Mem struct may cache multiple representations (string, 186 ** integer etc.) of the same value. 187 */ 188 struct sqlite3_value { 189 union MemValue { 190 double r; /* Real value used when MEM_Real is set in flags */ 191 i64 i; /* Integer value used when MEM_Int is set in flags */ 192 int nZero; /* Used when bit MEM_Zero is set in flags */ 193 void *pPtr; /* Pointer when flags=MEM_NULL and eSubtype='p' */ 194 FuncDef *pDef; /* Used only when flags==MEM_Agg */ 195 RowSet *pRowSet; /* Used only when flags==MEM_RowSet */ 196 VdbeFrame *pFrame; /* Used when flags==MEM_Frame */ 197 } u; 198 u16 flags; /* Some combination of MEM_Null, MEM_Str, MEM_Dyn, etc. */ 199 u8 enc; /* SQLITE_UTF8, SQLITE_UTF16BE, SQLITE_UTF16LE */ 200 u8 eSubtype; /* Subtype for this value */ 201 int n; /* Number of characters in string value, excluding '\0' */ 202 char *z; /* String or BLOB value */ 203 /* ShallowCopy only needs to copy the information above */ 204 char *zMalloc; /* Space to hold MEM_Str or MEM_Blob if szMalloc>0 */ 205 int szMalloc; /* Size of the zMalloc allocation */ 206 u32 uTemp; /* Transient storage for serial_type in OP_MakeRecord */ 207 sqlite3 *db; /* The associated database connection */ 208 void (*xDel)(void*);/* Destructor for Mem.z - only valid if MEM_Dyn */ 209 #ifdef SQLITE_DEBUG 210 Mem *pScopyFrom; /* This Mem is a shallow copy of pScopyFrom */ 211 void *pFiller; /* So that sizeof(Mem) is a multiple of 8 */ 212 #endif 213 }; 214 215 /* 216 ** Size of struct Mem not including the Mem.zMalloc member or anything that 217 ** follows. 218 */ 219 #define MEMCELLSIZE offsetof(Mem,zMalloc) 220 221 /* One or more of the following flags are set to indicate the validOK 222 ** representations of the value stored in the Mem struct. 223 ** 224 ** If the MEM_Null flag is set, then the value is an SQL NULL value. 225 ** No other flags may be set in this case. 226 ** 227 ** If the MEM_Str flag is set then Mem.z points at a string representation. 228 ** Usually this is encoded in the same unicode encoding as the main 229 ** database (see below for exceptions). If the MEM_Term flag is also 230 ** set, then the string is nul terminated. The MEM_Int and MEM_Real 231 ** flags may coexist with the MEM_Str flag. 232 */ 233 #define MEM_Null 0x0001 /* Value is NULL */ 234 #define MEM_Str 0x0002 /* Value is a string */ 235 #define MEM_Int 0x0004 /* Value is an integer */ 236 #define MEM_Real 0x0008 /* Value is a real number */ 237 #define MEM_Blob 0x0010 /* Value is a BLOB */ 238 #define MEM_AffMask 0x001f /* Mask of affinity bits */ 239 #define MEM_RowSet 0x0020 /* Value is a RowSet object */ 240 #define MEM_Frame 0x0040 /* Value is a VdbeFrame object */ 241 #define MEM_Undefined 0x0080 /* Value is undefined */ 242 #define MEM_Cleared 0x0100 /* NULL set by OP_Null, not from data */ 243 #define MEM_TypeMask 0x81ff /* Mask of type bits */ 244 245 246 /* Whenever Mem contains a valid string or blob representation, one of 247 ** the following flags must be set to determine the memory management 248 ** policy for Mem.z. The MEM_Term flag tells us whether or not the 249 ** string is \000 or \u0000 terminated 250 */ 251 #define MEM_Term 0x0200 /* String rep is nul terminated */ 252 #define MEM_Dyn 0x0400 /* Need to call Mem.xDel() on Mem.z */ 253 #define MEM_Static 0x0800 /* Mem.z points to a static string */ 254 #define MEM_Ephem 0x1000 /* Mem.z points to an ephemeral string */ 255 #define MEM_Agg 0x2000 /* Mem.z points to an agg function context */ 256 #define MEM_Zero 0x4000 /* Mem.i contains count of 0s appended to blob */ 257 #define MEM_Subtype 0x8000 /* Mem.eSubtype is valid */ 258 #ifdef SQLITE_OMIT_INCRBLOB 259 #undef MEM_Zero 260 #define MEM_Zero 0x0000 261 #endif 262 263 /* Return TRUE if Mem X contains dynamically allocated content - anything 264 ** that needs to be deallocated to avoid a leak. 265 */ 266 #define VdbeMemDynamic(X) \ 267 (((X)->flags&(MEM_Agg|MEM_Dyn|MEM_RowSet|MEM_Frame))!=0) 268 269 /* 270 ** Clear any existing type flags from a Mem and replace them with f 271 */ 272 #define MemSetTypeFlag(p, f) \ 273 ((p)->flags = ((p)->flags&~(MEM_TypeMask|MEM_Zero))|f) 274 275 /* 276 ** Return true if a memory cell is not marked as invalid. This macro 277 ** is for use inside assert() statements only. 278 */ 279 #ifdef SQLITE_DEBUG 280 #define memIsValid(M) ((M)->flags & MEM_Undefined)==0 281 #endif 282 283 /* 284 ** Each auxiliary data pointer stored by a user defined function 285 ** implementation calling sqlite3_set_auxdata() is stored in an instance 286 ** of this structure. All such structures associated with a single VM 287 ** are stored in a linked list headed at Vdbe.pAuxData. All are destroyed 288 ** when the VM is halted (if not before). 289 */ 290 struct AuxData { 291 int iAuxOp; /* Instruction number of OP_Function opcode */ 292 int iAuxArg; /* Index of function argument. */ 293 void *pAux; /* Aux data pointer */ 294 void (*xDeleteAux)(void*); /* Destructor for the aux data */ 295 AuxData *pNextAux; /* Next element in list */ 296 }; 297 298 /* 299 ** The "context" argument for an installable function. A pointer to an 300 ** instance of this structure is the first argument to the routines used 301 ** implement the SQL functions. 302 ** 303 ** There is a typedef for this structure in sqlite.h. So all routines, 304 ** even the public interface to SQLite, can use a pointer to this structure. 305 ** But this file is the only place where the internal details of this 306 ** structure are known. 307 ** 308 ** This structure is defined inside of vdbeInt.h because it uses substructures 309 ** (Mem) which are only defined there. 310 */ 311 struct sqlite3_context { 312 Mem *pOut; /* The return value is stored here */ 313 FuncDef *pFunc; /* Pointer to function information */ 314 Mem *pMem; /* Memory cell used to store aggregate context */ 315 Vdbe *pVdbe; /* The VM that owns this context */ 316 int iOp; /* Instruction number of OP_Function */ 317 int isError; /* Error code returned by the function. */ 318 u8 skipFlag; /* Skip accumulator loading if true */ 319 u8 fErrorOrAux; /* isError!=0 or pVdbe->pAuxData modified */ 320 u8 argc; /* Number of arguments */ 321 sqlite3_value *argv[1]; /* Argument set */ 322 }; 323 324 /* A bitfield type for use inside of structures. Always follow with :N where 325 ** N is the number of bits. 326 */ 327 typedef unsigned bft; /* Bit Field Type */ 328 329 typedef struct ScanStatus ScanStatus; 330 struct ScanStatus { 331 int addrExplain; /* OP_Explain for loop */ 332 int addrLoop; /* Address of "loops" counter */ 333 int addrVisit; /* Address of "rows visited" counter */ 334 int iSelectID; /* The "Select-ID" for this loop */ 335 LogEst nEst; /* Estimated output rows per loop */ 336 char *zName; /* Name of table or index */ 337 }; 338 339 /* 340 ** An instance of the virtual machine. This structure contains the complete 341 ** state of the virtual machine. 342 ** 343 ** The "sqlite3_stmt" structure pointer that is returned by sqlite3_prepare() 344 ** is really a pointer to an instance of this structure. 345 */ 346 struct Vdbe { 347 sqlite3 *db; /* The database connection that owns this statement */ 348 Vdbe *pPrev,*pNext; /* Linked list of VDBEs with the same Vdbe.db */ 349 Parse *pParse; /* Parsing context used to create this Vdbe */ 350 ynVar nVar; /* Number of entries in aVar[] */ 351 u32 magic; /* Magic number for sanity checking */ 352 int nMem; /* Number of memory locations currently allocated */ 353 int nCursor; /* Number of slots in apCsr[] */ 354 u32 cacheCtr; /* VdbeCursor row cache generation counter */ 355 int pc; /* The program counter */ 356 int rc; /* Value to return */ 357 int nChange; /* Number of db changes made since last reset */ 358 int iStatement; /* Statement number (or 0 if has not opened stmt) */ 359 i64 iCurrentTime; /* Value of julianday('now') for this statement */ 360 i64 nFkConstraint; /* Number of imm. FK constraints this VM */ 361 i64 nStmtDefCons; /* Number of def. constraints when stmt started */ 362 i64 nStmtDefImmCons; /* Number of def. imm constraints when stmt started */ 363 364 /* When allocating a new Vdbe object, all of the fields below should be 365 ** initialized to zero or NULL */ 366 367 Op *aOp; /* Space to hold the virtual machine's program */ 368 Mem *aMem; /* The memory locations */ 369 Mem **apArg; /* Arguments to currently executing user function */ 370 Mem *aColName; /* Column names to return */ 371 Mem *pResultSet; /* Pointer to an array of results */ 372 char *zErrMsg; /* Error message written here */ 373 VdbeCursor **apCsr; /* One element of this array for each open cursor */ 374 Mem *aVar; /* Values for the OP_Variable opcode. */ 375 VList *pVList; /* Name of variables */ 376 #ifndef SQLITE_OMIT_TRACE 377 i64 startTime; /* Time when query started - used for profiling */ 378 #endif 379 int nOp; /* Number of instructions in the program */ 380 #ifdef SQLITE_DEBUG 381 int rcApp; /* errcode set by sqlite3_result_error_code() */ 382 #endif 383 u16 nResColumn; /* Number of columns in one row of the result set */ 384 u8 errorAction; /* Recovery action to do in case of an error */ 385 u8 minWriteFileFormat; /* Minimum file format for writable database files */ 386 u8 prepFlags; /* SQLITE_PREPARE_* flags */ 387 bft expired:1; /* True if the VM needs to be recompiled */ 388 bft doingRerun:1; /* True if rerunning after an auto-reprepare */ 389 bft explain:2; /* True if EXPLAIN present on SQL command */ 390 bft changeCntOn:1; /* True to update the change-counter */ 391 bft runOnlyOnce:1; /* Automatically expire on reset */ 392 bft usesStmtJournal:1; /* True if uses a statement journal */ 393 bft readOnly:1; /* True for statements that do not write */ 394 bft bIsReader:1; /* True for statements that read */ 395 yDbMask btreeMask; /* Bitmask of db->aDb[] entries referenced */ 396 yDbMask lockMask; /* Subset of btreeMask that requires a lock */ 397 u32 aCounter[7]; /* Counters used by sqlite3_stmt_status() */ 398 char *zSql; /* Text of the SQL statement that generated this */ 399 void *pFree; /* Free this when deleting the vdbe */ 400 VdbeFrame *pFrame; /* Parent frame */ 401 VdbeFrame *pDelFrame; /* List of frame objects to free on VM reset */ 402 int nFrame; /* Number of frames in pFrame list */ 403 u32 expmask; /* Binding to these vars invalidates VM */ 404 SubProgram *pProgram; /* Linked list of all sub-programs used by VM */ 405 AuxData *pAuxData; /* Linked list of auxdata allocations */ 406 #ifdef SQLITE_ENABLE_STMT_SCANSTATUS 407 i64 *anExec; /* Number of times each op has been executed */ 408 int nScan; /* Entries in aScan[] */ 409 ScanStatus *aScan; /* Scan definitions for sqlite3_stmt_scanstatus() */ 410 #endif 411 }; 412 413 /* 414 ** The following are allowed values for Vdbe.magic 415 */ 416 #define VDBE_MAGIC_INIT 0x16bceaa5 /* Building a VDBE program */ 417 #define VDBE_MAGIC_RUN 0x2df20da3 /* VDBE is ready to execute */ 418 #define VDBE_MAGIC_HALT 0x319c2973 /* VDBE has completed execution */ 419 #define VDBE_MAGIC_RESET 0x48fa9f76 /* Reset and ready to run again */ 420 #define VDBE_MAGIC_DEAD 0x5606c3c8 /* The VDBE has been deallocated */ 421 422 /* 423 ** Structure used to store the context required by the 424 ** sqlite3_preupdate_*() API functions. 425 */ 426 struct PreUpdate { 427 Vdbe *v; 428 VdbeCursor *pCsr; /* Cursor to read old values from */ 429 int op; /* One of SQLITE_INSERT, UPDATE, DELETE */ 430 u8 *aRecord; /* old.* database record */ 431 KeyInfo keyinfo; 432 UnpackedRecord *pUnpacked; /* Unpacked version of aRecord[] */ 433 UnpackedRecord *pNewUnpacked; /* Unpacked version of new.* record */ 434 int iNewReg; /* Register for new.* values */ 435 i64 iKey1; /* First key value passed to hook */ 436 i64 iKey2; /* Second key value passed to hook */ 437 Mem *aNew; /* Array of new.* values */ 438 Table *pTab; /* Schema object being upated */ 439 Index *pPk; /* PK index if pTab is WITHOUT ROWID */ 440 }; 441 442 /* 443 ** Function prototypes 444 */ 445 void sqlite3VdbeError(Vdbe*, const char *, ...); 446 void sqlite3VdbeFreeCursor(Vdbe *, VdbeCursor*); 447 void sqliteVdbePopStack(Vdbe*,int); 448 int sqlite3VdbeCursorMoveto(VdbeCursor**, int*); 449 int sqlite3VdbeCursorRestore(VdbeCursor*); 450 #if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE) 451 void sqlite3VdbePrintOp(FILE*, int, Op*); 452 #endif 453 u32 sqlite3VdbeSerialTypeLen(u32); 454 u8 sqlite3VdbeOneByteSerialTypeLen(u8); 455 u32 sqlite3VdbeSerialType(Mem*, int, u32*); 456 u32 sqlite3VdbeSerialPut(unsigned char*, Mem*, u32); 457 u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*); 458 void sqlite3VdbeDeleteAuxData(sqlite3*, AuxData**, int, int); 459 460 int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *); 461 int sqlite3VdbeIdxKeyCompare(sqlite3*,VdbeCursor*,UnpackedRecord*,int*); 462 int sqlite3VdbeIdxRowid(sqlite3*, BtCursor*, i64*); 463 int sqlite3VdbeExec(Vdbe*); 464 int sqlite3VdbeList(Vdbe*); 465 int sqlite3VdbeHalt(Vdbe*); 466 int sqlite3VdbeChangeEncoding(Mem *, int); 467 int sqlite3VdbeMemTooBig(Mem*); 468 int sqlite3VdbeMemCopy(Mem*, const Mem*); 469 void sqlite3VdbeMemShallowCopy(Mem*, const Mem*, int); 470 void sqlite3VdbeMemMove(Mem*, Mem*); 471 int sqlite3VdbeMemNulTerminate(Mem*); 472 int sqlite3VdbeMemSetStr(Mem*, const char*, int, u8, void(*)(void*)); 473 void sqlite3VdbeMemSetInt64(Mem*, i64); 474 #ifdef SQLITE_OMIT_FLOATING_POINT 475 # define sqlite3VdbeMemSetDouble sqlite3VdbeMemSetInt64 476 #else 477 void sqlite3VdbeMemSetDouble(Mem*, double); 478 #endif 479 void sqlite3VdbeMemSetPointer(Mem*, void*); 480 void sqlite3VdbeMemInit(Mem*,sqlite3*,u16); 481 void sqlite3VdbeMemSetNull(Mem*); 482 void sqlite3VdbeMemSetZeroBlob(Mem*,int); 483 void sqlite3VdbeMemSetRowSet(Mem*); 484 int sqlite3VdbeMemMakeWriteable(Mem*); 485 int sqlite3VdbeMemStringify(Mem*, u8, u8); 486 i64 sqlite3VdbeIntValue(Mem*); 487 int sqlite3VdbeMemIntegerify(Mem*); 488 double sqlite3VdbeRealValue(Mem*); 489 void sqlite3VdbeIntegerAffinity(Mem*); 490 int sqlite3VdbeMemRealify(Mem*); 491 int sqlite3VdbeMemNumerify(Mem*); 492 void sqlite3VdbeMemCast(Mem*,u8,u8); 493 int sqlite3VdbeMemFromBtree(BtCursor*,u32,u32,Mem*); 494 void sqlite3VdbeMemRelease(Mem *p); 495 int sqlite3VdbeMemFinalize(Mem*, FuncDef*); 496 const char *sqlite3OpcodeName(int); 497 int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve); 498 int sqlite3VdbeMemClearAndResize(Mem *pMem, int n); 499 int sqlite3VdbeCloseStatement(Vdbe *, int); 500 void sqlite3VdbeFrameDelete(VdbeFrame*); 501 int sqlite3VdbeFrameRestore(VdbeFrame *); 502 #ifdef SQLITE_ENABLE_PREUPDATE_HOOK 503 void sqlite3VdbePreUpdateHook(Vdbe*,VdbeCursor*,int,const char*,Table*,i64,int); 504 #endif 505 int sqlite3VdbeTransferError(Vdbe *p); 506 507 int sqlite3VdbeSorterInit(sqlite3 *, int, VdbeCursor *); 508 void sqlite3VdbeSorterReset(sqlite3 *, VdbeSorter *); 509 void sqlite3VdbeSorterClose(sqlite3 *, VdbeCursor *); 510 int sqlite3VdbeSorterRowkey(const VdbeCursor *, Mem *); 511 int sqlite3VdbeSorterNext(sqlite3 *, const VdbeCursor *); 512 int sqlite3VdbeSorterRewind(const VdbeCursor *, int *); 513 int sqlite3VdbeSorterWrite(const VdbeCursor *, Mem *); 514 int sqlite3VdbeSorterCompare(const VdbeCursor *, Mem *, int, int *); 515 516 #if !defined(SQLITE_OMIT_SHARED_CACHE) 517 void sqlite3VdbeEnter(Vdbe*); 518 #else 519 # define sqlite3VdbeEnter(X) 520 #endif 521 522 #if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE>0 523 void sqlite3VdbeLeave(Vdbe*); 524 #else 525 # define sqlite3VdbeLeave(X) 526 #endif 527 528 #ifdef SQLITE_DEBUG 529 void sqlite3VdbeMemAboutToChange(Vdbe*,Mem*); 530 int sqlite3VdbeCheckMemInvariants(Mem*); 531 #endif 532 533 #ifndef SQLITE_OMIT_FOREIGN_KEY 534 int sqlite3VdbeCheckFk(Vdbe *, int); 535 #else 536 # define sqlite3VdbeCheckFk(p,i) 0 537 #endif 538 539 #ifdef SQLITE_DEBUG 540 void sqlite3VdbePrintSql(Vdbe*); 541 void sqlite3VdbeMemPrettyPrint(Mem *pMem, char *zBuf); 542 #endif 543 #ifndef SQLITE_OMIT_UTF16 544 int sqlite3VdbeMemTranslate(Mem*, u8); 545 int sqlite3VdbeMemHandleBom(Mem *pMem); 546 #endif 547 548 #ifndef SQLITE_OMIT_INCRBLOB 549 int sqlite3VdbeMemExpandBlob(Mem *); 550 #define ExpandBlob(P) (((P)->flags&MEM_Zero)?sqlite3VdbeMemExpandBlob(P):0) 551 #else 552 #define sqlite3VdbeMemExpandBlob(x) SQLITE_OK 553 #define ExpandBlob(P) SQLITE_OK 554 #endif 555 556 #endif /* !defined(SQLITE_VDBEINT_H) */ 557