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 _VDBEINT_H_ 19 #define _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 ** SQL is translated into a sequence of instructions to be 31 ** executed by a virtual machine. Each instruction is an instance 32 ** of the following structure. 33 */ 34 typedef struct VdbeOp Op; 35 36 /* 37 ** Boolean values 38 */ 39 typedef unsigned Bool; 40 41 /* Opaque type used by code in vdbesort.c */ 42 typedef struct VdbeSorter VdbeSorter; 43 44 /* Opaque type used by the explainer */ 45 typedef struct Explain Explain; 46 47 /* Elements of the linked list at Vdbe.pAuxData */ 48 typedef struct AuxData AuxData; 49 50 /* 51 ** A cursor is a pointer into a single BTree within a database file. 52 ** The cursor can seek to a BTree entry with a particular key, or 53 ** loop over all entries of the Btree. You can also insert new BTree 54 ** entries or retrieve the key or data from the entry that the cursor 55 ** is currently pointing to. 56 ** 57 ** Cursors can also point to virtual tables, sorters, or "pseudo-tables". 58 ** A pseudo-table is a single-row table implemented by registers. 59 ** 60 ** Every cursor that the virtual machine has open is represented by an 61 ** instance of the following structure. 62 */ 63 struct VdbeCursor { 64 BtCursor *pCursor; /* The cursor structure of the backend */ 65 Btree *pBt; /* Separate file holding temporary table */ 66 KeyInfo *pKeyInfo; /* Info about index keys needed by index cursors */ 67 int seekResult; /* Result of previous sqlite3BtreeMoveto() */ 68 int pseudoTableReg; /* Register holding pseudotable content. */ 69 i16 nField; /* Number of fields in the header */ 70 u16 nHdrParsed; /* Number of header fields parsed so far */ 71 #ifdef SQLITE_DEBUG 72 u8 seekOp; /* Most recent seek operation on this cursor */ 73 #endif 74 i8 iDb; /* Index of cursor database in db->aDb[] (or -1) */ 75 u8 nullRow; /* True if pointing to a row with no data */ 76 u8 deferredMoveto; /* A call to sqlite3BtreeMoveto() is needed */ 77 Bool isEphemeral:1; /* True for an ephemeral table */ 78 Bool useRandomRowid:1;/* Generate new record numbers semi-randomly */ 79 Bool isTable:1; /* True if a table requiring integer keys */ 80 Bool isOrdered:1; /* True if the underlying table is BTREE_UNORDERED */ 81 Pgno pgnoRoot; /* Root page of the open btree cursor */ 82 sqlite3_vtab_cursor *pVtabCursor; /* The cursor for a virtual table */ 83 i64 seqCount; /* Sequence counter */ 84 i64 movetoTarget; /* Argument to the deferred sqlite3BtreeMoveto() */ 85 VdbeSorter *pSorter; /* Sorter object for OP_SorterOpen cursors */ 86 87 /* Cached information about the header for the data record that the 88 ** cursor is currently pointing to. Only valid if cacheStatus matches 89 ** Vdbe.cacheCtr. Vdbe.cacheCtr will never take on the value of 90 ** CACHE_STALE and so setting cacheStatus=CACHE_STALE guarantees that 91 ** the cache is out of date. 92 ** 93 ** aRow might point to (ephemeral) data for the current row, or it might 94 ** be NULL. 95 */ 96 u32 cacheStatus; /* Cache is valid if this matches Vdbe.cacheCtr */ 97 u32 payloadSize; /* Total number of bytes in the record */ 98 u32 szRow; /* Byte available in aRow */ 99 u32 iHdrOffset; /* Offset to next unparsed byte of the header */ 100 const u8 *aRow; /* Data for the current row, if all on one page */ 101 u32 *aOffset; /* Pointer to aType[nField] */ 102 u32 aType[1]; /* Type values for all entries in the record */ 103 /* 2*nField extra array elements allocated for aType[], beyond the one 104 ** static element declared in the structure. nField total array slots for 105 ** aType[] and nField+1 array slots for aOffset[] */ 106 }; 107 typedef struct VdbeCursor VdbeCursor; 108 109 /* 110 ** When a sub-program is executed (OP_Program), a structure of this type 111 ** is allocated to store the current value of the program counter, as 112 ** well as the current memory cell array and various other frame specific 113 ** values stored in the Vdbe struct. When the sub-program is finished, 114 ** these values are copied back to the Vdbe from the VdbeFrame structure, 115 ** restoring the state of the VM to as it was before the sub-program 116 ** began executing. 117 ** 118 ** The memory for a VdbeFrame object is allocated and managed by a memory 119 ** cell in the parent (calling) frame. When the memory cell is deleted or 120 ** overwritten, the VdbeFrame object is not freed immediately. Instead, it 121 ** is linked into the Vdbe.pDelFrame list. The contents of the Vdbe.pDelFrame 122 ** list is deleted when the VM is reset in VdbeHalt(). The reason for doing 123 ** this instead of deleting the VdbeFrame immediately is to avoid recursive 124 ** calls to sqlite3VdbeMemRelease() when the memory cells belonging to the 125 ** child frame are released. 126 ** 127 ** The currently executing frame is stored in Vdbe.pFrame. Vdbe.pFrame is 128 ** set to NULL if the currently executing frame is the main program. 129 */ 130 typedef struct VdbeFrame VdbeFrame; 131 struct VdbeFrame { 132 Vdbe *v; /* VM this frame belongs to */ 133 VdbeFrame *pParent; /* Parent of this frame, or NULL if parent is main */ 134 Op *aOp; /* Program instructions for parent frame */ 135 i64 *anExec; /* Event counters from parent frame */ 136 Mem *aMem; /* Array of memory cells for parent frame */ 137 u8 *aOnceFlag; /* Array of OP_Once flags for parent frame */ 138 VdbeCursor **apCsr; /* Array of Vdbe cursors for parent frame */ 139 void *token; /* Copy of SubProgram.token */ 140 i64 lastRowid; /* Last insert rowid (sqlite3.lastRowid) */ 141 int nCursor; /* Number of entries in apCsr */ 142 int pc; /* Program Counter in parent (calling) frame */ 143 int nOp; /* Size of aOp array */ 144 int nMem; /* Number of entries in aMem */ 145 int nOnceFlag; /* Number of entries in aOnceFlag */ 146 int nChildMem; /* Number of memory cells for child frame */ 147 int nChildCsr; /* Number of cursors for child frame */ 148 int nChange; /* Statement changes (Vdbe.nChange) */ 149 int nDbChange; /* Value of db->nChange */ 150 }; 151 152 #define VdbeFrameMem(p) ((Mem *)&((u8 *)p)[ROUND8(sizeof(VdbeFrame))]) 153 154 /* 155 ** A value for VdbeCursor.cacheValid that means the cache is always invalid. 156 */ 157 #define CACHE_STALE 0 158 159 /* 160 ** Internally, the vdbe manipulates nearly all SQL values as Mem 161 ** structures. Each Mem struct may cache multiple representations (string, 162 ** integer etc.) of the same value. 163 */ 164 struct Mem { 165 union MemValue { 166 double r; /* Real value used when MEM_Real is set in flags */ 167 i64 i; /* Integer value used when MEM_Int is set in flags */ 168 int nZero; /* Used when bit MEM_Zero is set in flags */ 169 FuncDef *pDef; /* Used only when flags==MEM_Agg */ 170 RowSet *pRowSet; /* Used only when flags==MEM_RowSet */ 171 VdbeFrame *pFrame; /* Used when flags==MEM_Frame */ 172 } u; 173 u16 flags; /* Some combination of MEM_Null, MEM_Str, MEM_Dyn, etc. */ 174 u8 enc; /* SQLITE_UTF8, SQLITE_UTF16BE, SQLITE_UTF16LE */ 175 int n; /* Number of characters in string value, excluding '\0' */ 176 char *z; /* String or BLOB value */ 177 /* ShallowCopy only needs to copy the information above */ 178 char *zMalloc; /* Space to hold MEM_Str or MEM_Blob if szMalloc>0 */ 179 int szMalloc; /* Size of the zMalloc allocation */ 180 u32 uTemp; /* Transient storage for serial_type in OP_MakeRecord */ 181 sqlite3 *db; /* The associated database connection */ 182 void (*xDel)(void*);/* Destructor for Mem.z - only valid if MEM_Dyn */ 183 #ifdef SQLITE_DEBUG 184 Mem *pScopyFrom; /* This Mem is a shallow copy of pScopyFrom */ 185 void *pFiller; /* So that sizeof(Mem) is a multiple of 8 */ 186 #endif 187 }; 188 189 /* One or more of the following flags are set to indicate the validOK 190 ** representations of the value stored in the Mem struct. 191 ** 192 ** If the MEM_Null flag is set, then the value is an SQL NULL value. 193 ** No other flags may be set in this case. 194 ** 195 ** If the MEM_Str flag is set then Mem.z points at a string representation. 196 ** Usually this is encoded in the same unicode encoding as the main 197 ** database (see below for exceptions). If the MEM_Term flag is also 198 ** set, then the string is nul terminated. The MEM_Int and MEM_Real 199 ** flags may coexist with the MEM_Str flag. 200 */ 201 #define MEM_Null 0x0001 /* Value is NULL */ 202 #define MEM_Str 0x0002 /* Value is a string */ 203 #define MEM_Int 0x0004 /* Value is an integer */ 204 #define MEM_Real 0x0008 /* Value is a real number */ 205 #define MEM_Blob 0x0010 /* Value is a BLOB */ 206 #define MEM_AffMask 0x001f /* Mask of affinity bits */ 207 #define MEM_RowSet 0x0020 /* Value is a RowSet object */ 208 #define MEM_Frame 0x0040 /* Value is a VdbeFrame object */ 209 #define MEM_Undefined 0x0080 /* Value is undefined */ 210 #define MEM_Cleared 0x0100 /* NULL set by OP_Null, not from data */ 211 #define MEM_TypeMask 0x01ff /* Mask of type bits */ 212 213 214 /* Whenever Mem contains a valid string or blob representation, one of 215 ** the following flags must be set to determine the memory management 216 ** policy for Mem.z. The MEM_Term flag tells us whether or not the 217 ** string is \000 or \u0000 terminated 218 */ 219 #define MEM_Term 0x0200 /* String rep is nul terminated */ 220 #define MEM_Dyn 0x0400 /* Need to call Mem.xDel() on Mem.z */ 221 #define MEM_Static 0x0800 /* Mem.z points to a static string */ 222 #define MEM_Ephem 0x1000 /* Mem.z points to an ephemeral string */ 223 #define MEM_Agg 0x2000 /* Mem.z points to an agg function context */ 224 #define MEM_Zero 0x4000 /* Mem.i contains count of 0s appended to blob */ 225 #ifdef SQLITE_OMIT_INCRBLOB 226 #undef MEM_Zero 227 #define MEM_Zero 0x0000 228 #endif 229 230 /* 231 ** Clear any existing type flags from a Mem and replace them with f 232 */ 233 #define MemSetTypeFlag(p, f) \ 234 ((p)->flags = ((p)->flags&~(MEM_TypeMask|MEM_Zero))|f) 235 236 /* 237 ** Return true if a memory cell is not marked as invalid. This macro 238 ** is for use inside assert() statements only. 239 */ 240 #ifdef SQLITE_DEBUG 241 #define memIsValid(M) ((M)->flags & MEM_Undefined)==0 242 #endif 243 244 /* 245 ** Each auxiliary data pointer stored by a user defined function 246 ** implementation calling sqlite3_set_auxdata() is stored in an instance 247 ** of this structure. All such structures associated with a single VM 248 ** are stored in a linked list headed at Vdbe.pAuxData. All are destroyed 249 ** when the VM is halted (if not before). 250 */ 251 struct AuxData { 252 int iOp; /* Instruction number of OP_Function opcode */ 253 int iArg; /* Index of function argument. */ 254 void *pAux; /* Aux data pointer */ 255 void (*xDelete)(void *); /* Destructor for the aux data */ 256 AuxData *pNext; /* Next element in list */ 257 }; 258 259 /* 260 ** The "context" argument for an installable function. A pointer to an 261 ** instance of this structure is the first argument to the routines used 262 ** implement the SQL functions. 263 ** 264 ** There is a typedef for this structure in sqlite.h. So all routines, 265 ** even the public interface to SQLite, can use a pointer to this structure. 266 ** But this file is the only place where the internal details of this 267 ** structure are known. 268 ** 269 ** This structure is defined inside of vdbeInt.h because it uses substructures 270 ** (Mem) which are only defined there. 271 */ 272 struct sqlite3_context { 273 Mem *pOut; /* The return value is stored here */ 274 FuncDef *pFunc; /* Pointer to function information */ 275 Mem *pMem; /* Memory cell used to store aggregate context */ 276 Vdbe *pVdbe; /* The VM that owns this context */ 277 int iOp; /* Instruction number of OP_Function */ 278 int isError; /* Error code returned by the function. */ 279 u8 skipFlag; /* Skip accumulator loading if true */ 280 u8 fErrorOrAux; /* isError!=0 or pVdbe->pAuxData modified */ 281 }; 282 283 /* 284 ** An Explain object accumulates indented output which is helpful 285 ** in describing recursive data structures. 286 */ 287 struct Explain { 288 Vdbe *pVdbe; /* Attach the explanation to this Vdbe */ 289 StrAccum str; /* The string being accumulated */ 290 int nIndent; /* Number of elements in aIndent */ 291 u16 aIndent[100]; /* Levels of indentation */ 292 char zBase[100]; /* Initial space */ 293 }; 294 295 /* A bitfield type for use inside of structures. Always follow with :N where 296 ** N is the number of bits. 297 */ 298 typedef unsigned bft; /* Bit Field Type */ 299 300 typedef struct ScanStatus ScanStatus; 301 struct ScanStatus { 302 int addrExplain; /* OP_Explain for loop */ 303 int addrLoop; /* Address of "loops" counter */ 304 int addrVisit; /* Address of "rows visited" counter */ 305 int iSelectID; /* The "Select-ID" for this loop */ 306 LogEst nEst; /* Estimated output rows per loop */ 307 char *zName; /* Name of table or index */ 308 }; 309 310 /* 311 ** An instance of the virtual machine. This structure contains the complete 312 ** state of the virtual machine. 313 ** 314 ** The "sqlite3_stmt" structure pointer that is returned by sqlite3_prepare() 315 ** is really a pointer to an instance of this structure. 316 */ 317 struct Vdbe { 318 sqlite3 *db; /* The database connection that owns this statement */ 319 Op *aOp; /* Space to hold the virtual machine's program */ 320 Mem *aMem; /* The memory locations */ 321 Mem **apArg; /* Arguments to currently executing user function */ 322 Mem *aColName; /* Column names to return */ 323 Mem *pResultSet; /* Pointer to an array of results */ 324 Parse *pParse; /* Parsing context used to create this Vdbe */ 325 int nMem; /* Number of memory locations currently allocated */ 326 int nOp; /* Number of instructions in the program */ 327 int nCursor; /* Number of slots in apCsr[] */ 328 u32 magic; /* Magic number for sanity checking */ 329 char *zErrMsg; /* Error message written here */ 330 Vdbe *pPrev,*pNext; /* Linked list of VDBEs with the same Vdbe.db */ 331 VdbeCursor **apCsr; /* One element of this array for each open cursor */ 332 Mem *aVar; /* Values for the OP_Variable opcode. */ 333 char **azVar; /* Name of variables */ 334 ynVar nVar; /* Number of entries in aVar[] */ 335 ynVar nzVar; /* Number of entries in azVar[] */ 336 u32 cacheCtr; /* VdbeCursor row cache generation counter */ 337 int pc; /* The program counter */ 338 int rc; /* Value to return */ 339 #ifdef SQLITE_DEBUG 340 int rcApp; /* errcode set by sqlite3_result_error_code() */ 341 #endif 342 u16 nResColumn; /* Number of columns in one row of the result set */ 343 u8 errorAction; /* Recovery action to do in case of an error */ 344 u8 minWriteFileFormat; /* Minimum file format for writable database files */ 345 bft explain:2; /* True if EXPLAIN present on SQL command */ 346 bft changeCntOn:1; /* True to update the change-counter */ 347 bft expired:1; /* True if the VM needs to be recompiled */ 348 bft runOnlyOnce:1; /* Automatically expire on reset */ 349 bft usesStmtJournal:1; /* True if uses a statement journal */ 350 bft readOnly:1; /* True for statements that do not write */ 351 bft bIsReader:1; /* True for statements that read */ 352 bft isPrepareV2:1; /* True if prepared with prepare_v2() */ 353 bft doingRerun:1; /* True if rerunning after an auto-reprepare */ 354 int nChange; /* Number of db changes made since last reset */ 355 yDbMask btreeMask; /* Bitmask of db->aDb[] entries referenced */ 356 yDbMask lockMask; /* Subset of btreeMask that requires a lock */ 357 int iStatement; /* Statement number (or 0 if has not opened stmt) */ 358 u32 aCounter[5]; /* Counters used by sqlite3_stmt_status() */ 359 #ifndef SQLITE_OMIT_TRACE 360 i64 startTime; /* Time when query started - used for profiling */ 361 #endif 362 i64 iCurrentTime; /* Value of julianday('now') for this statement */ 363 i64 nFkConstraint; /* Number of imm. FK constraints this VM */ 364 i64 nStmtDefCons; /* Number of def. constraints when stmt started */ 365 i64 nStmtDefImmCons; /* Number of def. imm constraints when stmt started */ 366 char *zSql; /* Text of the SQL statement that generated this */ 367 void *pFree; /* Free this when deleting the vdbe */ 368 VdbeFrame *pFrame; /* Parent frame */ 369 VdbeFrame *pDelFrame; /* List of frame objects to free on VM reset */ 370 int nFrame; /* Number of frames in pFrame list */ 371 u32 expmask; /* Binding to these vars invalidates VM */ 372 SubProgram *pProgram; /* Linked list of all sub-programs used by VM */ 373 int nOnceFlag; /* Size of array aOnceFlag[] */ 374 u8 *aOnceFlag; /* Flags for OP_Once */ 375 AuxData *pAuxData; /* Linked list of auxdata allocations */ 376 #ifdef SQLITE_ENABLE_STMT_SCANSTATUS 377 i64 *anExec; /* Number of times each op has been executed */ 378 int nScan; /* Entries in aScan[] */ 379 ScanStatus *aScan; /* Scan definitions for sqlite3_stmt_scanstatus() */ 380 #endif 381 }; 382 383 /* 384 ** The following are allowed values for Vdbe.magic 385 */ 386 #define VDBE_MAGIC_INIT 0x26bceaa5 /* Building a VDBE program */ 387 #define VDBE_MAGIC_RUN 0xbdf20da3 /* VDBE is ready to execute */ 388 #define VDBE_MAGIC_HALT 0x519c2973 /* VDBE has completed execution */ 389 #define VDBE_MAGIC_DEAD 0xb606c3c8 /* The VDBE has been deallocated */ 390 391 /* 392 ** Function prototypes 393 */ 394 void sqlite3VdbeFreeCursor(Vdbe *, VdbeCursor*); 395 void sqliteVdbePopStack(Vdbe*,int); 396 int sqlite3VdbeCursorMoveto(VdbeCursor*); 397 int sqlite3VdbeCursorRestore(VdbeCursor*); 398 #if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE) 399 void sqlite3VdbePrintOp(FILE*, int, Op*); 400 #endif 401 u32 sqlite3VdbeSerialTypeLen(u32); 402 u32 sqlite3VdbeSerialType(Mem*, int); 403 u32 sqlite3VdbeSerialPut(unsigned char*, Mem*, u32); 404 u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*); 405 void sqlite3VdbeDeleteAuxData(Vdbe*, int, int); 406 407 int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *); 408 int sqlite3VdbeIdxKeyCompare(sqlite3*,VdbeCursor*,UnpackedRecord*,int*); 409 int sqlite3VdbeIdxRowid(sqlite3*, BtCursor*, i64*); 410 int sqlite3VdbeExec(Vdbe*); 411 int sqlite3VdbeList(Vdbe*); 412 int sqlite3VdbeHalt(Vdbe*); 413 int sqlite3VdbeChangeEncoding(Mem *, int); 414 int sqlite3VdbeMemTooBig(Mem*); 415 int sqlite3VdbeMemCopy(Mem*, const Mem*); 416 void sqlite3VdbeMemShallowCopy(Mem*, const Mem*, int); 417 void sqlite3VdbeMemMove(Mem*, Mem*); 418 int sqlite3VdbeMemNulTerminate(Mem*); 419 int sqlite3VdbeMemSetStr(Mem*, const char*, int, u8, void(*)(void*)); 420 void sqlite3VdbeMemSetInt64(Mem*, i64); 421 #ifdef SQLITE_OMIT_FLOATING_POINT 422 # define sqlite3VdbeMemSetDouble sqlite3VdbeMemSetInt64 423 #else 424 void sqlite3VdbeMemSetDouble(Mem*, double); 425 #endif 426 void sqlite3VdbeMemInit(Mem*,sqlite3*,u16); 427 void sqlite3VdbeMemSetNull(Mem*); 428 void sqlite3VdbeMemSetZeroBlob(Mem*,int); 429 void sqlite3VdbeMemSetRowSet(Mem*); 430 int sqlite3VdbeMemMakeWriteable(Mem*); 431 int sqlite3VdbeMemStringify(Mem*, u8, u8); 432 i64 sqlite3VdbeIntValue(Mem*); 433 int sqlite3VdbeMemIntegerify(Mem*); 434 double sqlite3VdbeRealValue(Mem*); 435 void sqlite3VdbeIntegerAffinity(Mem*); 436 int sqlite3VdbeMemRealify(Mem*); 437 int sqlite3VdbeMemNumerify(Mem*); 438 void sqlite3VdbeMemCast(Mem*,u8,u8); 439 int sqlite3VdbeMemFromBtree(BtCursor*,u32,u32,int,Mem*); 440 void sqlite3VdbeMemRelease(Mem *p); 441 #define VdbeMemDynamic(X) \ 442 (((X)->flags&(MEM_Agg|MEM_Dyn|MEM_RowSet|MEM_Frame))!=0) 443 int sqlite3VdbeMemFinalize(Mem*, FuncDef*); 444 const char *sqlite3OpcodeName(int); 445 int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve); 446 int sqlite3VdbeMemClearAndResize(Mem *pMem, int n); 447 int sqlite3VdbeCloseStatement(Vdbe *, int); 448 void sqlite3VdbeFrameDelete(VdbeFrame*); 449 int sqlite3VdbeFrameRestore(VdbeFrame *); 450 int sqlite3VdbeTransferError(Vdbe *p); 451 452 int sqlite3VdbeSorterInit(sqlite3 *, int, VdbeCursor *); 453 void sqlite3VdbeSorterReset(sqlite3 *, VdbeSorter *); 454 void sqlite3VdbeSorterClose(sqlite3 *, VdbeCursor *); 455 int sqlite3VdbeSorterRowkey(const VdbeCursor *, Mem *); 456 int sqlite3VdbeSorterNext(sqlite3 *, const VdbeCursor *, int *); 457 int sqlite3VdbeSorterRewind(const VdbeCursor *, int *); 458 int sqlite3VdbeSorterWrite(const VdbeCursor *, Mem *); 459 int sqlite3VdbeSorterCompare(const VdbeCursor *, Mem *, int, int *); 460 461 #if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE>0 462 void sqlite3VdbeEnter(Vdbe*); 463 void sqlite3VdbeLeave(Vdbe*); 464 #else 465 # define sqlite3VdbeEnter(X) 466 # define sqlite3VdbeLeave(X) 467 #endif 468 469 #ifdef SQLITE_DEBUG 470 void sqlite3VdbeMemAboutToChange(Vdbe*,Mem*); 471 int sqlite3VdbeCheckMemInvariants(Mem*); 472 #endif 473 474 #ifndef SQLITE_OMIT_FOREIGN_KEY 475 int sqlite3VdbeCheckFk(Vdbe *, int); 476 #else 477 # define sqlite3VdbeCheckFk(p,i) 0 478 #endif 479 480 int sqlite3VdbeMemTranslate(Mem*, u8); 481 #ifdef SQLITE_DEBUG 482 void sqlite3VdbePrintSql(Vdbe*); 483 void sqlite3VdbeMemPrettyPrint(Mem *pMem, char *zBuf); 484 #endif 485 int sqlite3VdbeMemHandleBom(Mem *pMem); 486 487 #ifndef SQLITE_OMIT_INCRBLOB 488 int sqlite3VdbeMemExpandBlob(Mem *); 489 #define ExpandBlob(P) (((P)->flags&MEM_Zero)?sqlite3VdbeMemExpandBlob(P):0) 490 #else 491 #define sqlite3VdbeMemExpandBlob(x) SQLITE_OK 492 #define ExpandBlob(P) SQLITE_OK 493 #endif 494 495 #endif /* !defined(_VDBEINT_H_) */ 496