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 rowidIsValid; /* True if lastRowid is valid */ 77 u8 deferredMoveto; /* A call to sqlite3BtreeMoveto() is needed */ 78 Bool isEphemeral:1; /* True for an ephemeral table */ 79 Bool useRandomRowid:1;/* Generate new record numbers semi-randomly */ 80 Bool isTable:1; /* True if a table requiring integer keys */ 81 Bool isOrdered:1; /* True if the underlying table is BTREE_UNORDERED */ 82 Pgno pgnoRoot; /* Root page of the open btree cursor */ 83 sqlite3_vtab_cursor *pVtabCursor; /* The cursor for a virtual table */ 84 i64 seqCount; /* Sequence counter */ 85 i64 movetoTarget; /* Argument to the deferred sqlite3BtreeMoveto() */ 86 i64 lastRowid; /* Rowid being deleted by OP_Delete */ 87 VdbeSorter *pSorter; /* Sorter object for OP_SorterOpen cursors */ 88 89 /* Cached information about the header for the data record that the 90 ** cursor is currently pointing to. Only valid if cacheStatus matches 91 ** Vdbe.cacheCtr. Vdbe.cacheCtr will never take on the value of 92 ** CACHE_STALE and so setting cacheStatus=CACHE_STALE guarantees that 93 ** the cache is out of date. 94 ** 95 ** aRow might point to (ephemeral) data for the current row, or it might 96 ** be NULL. 97 */ 98 u32 cacheStatus; /* Cache is valid if this matches Vdbe.cacheCtr */ 99 u32 payloadSize; /* Total number of bytes in the record */ 100 u32 szRow; /* Byte available in aRow */ 101 u32 iHdrOffset; /* Offset to next unparsed byte of the header */ 102 const u8 *aRow; /* Data for the current row, if all on one page */ 103 u32 aType[1]; /* Type values for all entries in the record */ 104 /* 2*nField extra array elements allocated for aType[], beyond the one 105 ** static element declared in the structure. nField total array slots for 106 ** aType[] and nField+1 array slots for aOffset[] */ 107 }; 108 typedef struct VdbeCursor VdbeCursor; 109 110 /* 111 ** When a sub-program is executed (OP_Program), a structure of this type 112 ** is allocated to store the current value of the program counter, as 113 ** well as the current memory cell array and various other frame specific 114 ** values stored in the Vdbe struct. When the sub-program is finished, 115 ** these values are copied back to the Vdbe from the VdbeFrame structure, 116 ** restoring the state of the VM to as it was before the sub-program 117 ** began executing. 118 ** 119 ** The memory for a VdbeFrame object is allocated and managed by a memory 120 ** cell in the parent (calling) frame. When the memory cell is deleted or 121 ** overwritten, the VdbeFrame object is not freed immediately. Instead, it 122 ** is linked into the Vdbe.pDelFrame list. The contents of the Vdbe.pDelFrame 123 ** list is deleted when the VM is reset in VdbeHalt(). The reason for doing 124 ** this instead of deleting the VdbeFrame immediately is to avoid recursive 125 ** calls to sqlite3VdbeMemRelease() when the memory cells belonging to the 126 ** child frame are released. 127 ** 128 ** The currently executing frame is stored in Vdbe.pFrame. Vdbe.pFrame is 129 ** set to NULL if the currently executing frame is the main program. 130 */ 131 typedef struct VdbeFrame VdbeFrame; 132 struct VdbeFrame { 133 Vdbe *v; /* VM this frame belongs to */ 134 VdbeFrame *pParent; /* Parent of this frame, or NULL if parent is main */ 135 Op *aOp; /* Program instructions for 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.nChanges) */ 149 }; 150 151 #define VdbeFrameMem(p) ((Mem *)&((u8 *)p)[ROUND8(sizeof(VdbeFrame))]) 152 153 /* 154 ** A value for VdbeCursor.cacheValid that means the cache is always invalid. 155 */ 156 #define CACHE_STALE 0 157 158 /* 159 ** Internally, the vdbe manipulates nearly all SQL values as Mem 160 ** structures. Each Mem struct may cache multiple representations (string, 161 ** integer etc.) of the same value. 162 */ 163 struct Mem { 164 sqlite3 *db; /* The associated database connection */ 165 char *z; /* String or BLOB value */ 166 double r; /* Real value */ 167 union { 168 i64 i; /* Integer value used when MEM_Int is set in flags */ 169 int nZero; /* Used when bit MEM_Zero is set in flags */ 170 FuncDef *pDef; /* Used only when flags==MEM_Agg */ 171 RowSet *pRowSet; /* Used only when flags==MEM_RowSet */ 172 VdbeFrame *pFrame; /* Used when flags==MEM_Frame */ 173 } u; 174 int n; /* Number of characters in string value, excluding '\0' */ 175 u16 flags; /* Some combination of MEM_Null, MEM_Str, MEM_Dyn, etc. */ 176 u8 enc; /* SQLITE_UTF8, SQLITE_UTF16BE, SQLITE_UTF16LE */ 177 #ifdef SQLITE_DEBUG 178 Mem *pScopyFrom; /* This Mem is a shallow copy of pScopyFrom */ 179 void *pFiller; /* So that sizeof(Mem) is a multiple of 8 */ 180 #endif 181 void (*xDel)(void *); /* If not null, call this function to delete Mem.z */ 182 char *zMalloc; /* Dynamic buffer allocated by sqlite3_malloc() */ 183 }; 184 185 /* One or more of the following flags are set to indicate the validOK 186 ** representations of the value stored in the Mem struct. 187 ** 188 ** If the MEM_Null flag is set, then the value is an SQL NULL value. 189 ** No other flags may be set in this case. 190 ** 191 ** If the MEM_Str flag is set then Mem.z points at a string representation. 192 ** Usually this is encoded in the same unicode encoding as the main 193 ** database (see below for exceptions). If the MEM_Term flag is also 194 ** set, then the string is nul terminated. The MEM_Int and MEM_Real 195 ** flags may coexist with the MEM_Str flag. 196 */ 197 #define MEM_Null 0x0001 /* Value is NULL */ 198 #define MEM_Str 0x0002 /* Value is a string */ 199 #define MEM_Int 0x0004 /* Value is an integer */ 200 #define MEM_Real 0x0008 /* Value is a real number */ 201 #define MEM_Blob 0x0010 /* Value is a BLOB */ 202 #define MEM_AffMask 0x001f /* Mask of affinity bits */ 203 #define MEM_RowSet 0x0020 /* Value is a RowSet object */ 204 #define MEM_Frame 0x0040 /* Value is a VdbeFrame object */ 205 #define MEM_Undefined 0x0080 /* Value is undefined */ 206 #define MEM_Cleared 0x0100 /* NULL set by OP_Null, not from data */ 207 #define MEM_TypeMask 0x01ff /* Mask of type bits */ 208 209 210 /* Whenever Mem contains a valid string or blob representation, one of 211 ** the following flags must be set to determine the memory management 212 ** policy for Mem.z. The MEM_Term flag tells us whether or not the 213 ** string is \000 or \u0000 terminated 214 */ 215 #define MEM_Term 0x0200 /* String rep is nul terminated */ 216 #define MEM_Dyn 0x0400 /* Need to call Mem.xDel() on Mem.z */ 217 #define MEM_Static 0x0800 /* Mem.z points to a static string */ 218 #define MEM_Ephem 0x1000 /* Mem.z points to an ephemeral string */ 219 #define MEM_Agg 0x2000 /* Mem.z points to an agg function context */ 220 #define MEM_Zero 0x4000 /* Mem.i contains count of 0s appended to blob */ 221 #ifdef SQLITE_OMIT_INCRBLOB 222 #undef MEM_Zero 223 #define MEM_Zero 0x0000 224 #endif 225 226 /* 227 ** Clear any existing type flags from a Mem and replace them with f 228 */ 229 #define MemSetTypeFlag(p, f) \ 230 ((p)->flags = ((p)->flags&~(MEM_TypeMask|MEM_Zero))|f) 231 232 /* 233 ** Return true if a memory cell is not marked as invalid. This macro 234 ** is for use inside assert() statements only. 235 */ 236 #ifdef SQLITE_DEBUG 237 #define memIsValid(M) ((M)->flags & MEM_Undefined)==0 238 #endif 239 240 /* 241 ** Each auxilliary data pointer stored by a user defined function 242 ** implementation calling sqlite3_set_auxdata() is stored in an instance 243 ** of this structure. All such structures associated with a single VM 244 ** are stored in a linked list headed at Vdbe.pAuxData. All are destroyed 245 ** when the VM is halted (if not before). 246 */ 247 struct AuxData { 248 int iOp; /* Instruction number of OP_Function opcode */ 249 int iArg; /* Index of function argument. */ 250 void *pAux; /* Aux data pointer */ 251 void (*xDelete)(void *); /* Destructor for the aux data */ 252 AuxData *pNext; /* Next element in list */ 253 }; 254 255 /* 256 ** The "context" argument for a installable function. A pointer to an 257 ** instance of this structure is the first argument to the routines used 258 ** implement the SQL functions. 259 ** 260 ** There is a typedef for this structure in sqlite.h. So all routines, 261 ** even the public interface to SQLite, can use a pointer to this structure. 262 ** But this file is the only place where the internal details of this 263 ** structure are known. 264 ** 265 ** This structure is defined inside of vdbeInt.h because it uses substructures 266 ** (Mem) which are only defined there. 267 */ 268 struct sqlite3_context { 269 FuncDef *pFunc; /* Pointer to function information. MUST BE FIRST */ 270 Mem s; /* The return value is stored here */ 271 Mem *pMem; /* Memory cell used to store aggregate context */ 272 CollSeq *pColl; /* Collating sequence */ 273 Vdbe *pVdbe; /* The VM that owns this context */ 274 int iOp; /* Instruction number of OP_Function */ 275 int isError; /* Error code returned by the function. */ 276 u8 skipFlag; /* Skip skip accumulator loading if true */ 277 u8 fErrorOrAux; /* isError!=0 or pVdbe->pAuxData modified */ 278 }; 279 280 /* 281 ** An Explain object accumulates indented output which is helpful 282 ** in describing recursive data structures. 283 */ 284 struct Explain { 285 Vdbe *pVdbe; /* Attach the explanation to this Vdbe */ 286 StrAccum str; /* The string being accumulated */ 287 int nIndent; /* Number of elements in aIndent */ 288 u16 aIndent[100]; /* Levels of indentation */ 289 char zBase[100]; /* Initial space */ 290 }; 291 292 /* A bitfield type for use inside of structures. Always follow with :N where 293 ** N is the number of bits. 294 */ 295 typedef unsigned bft; /* Bit Field Type */ 296 297 /* 298 ** An instance of the virtual machine. This structure contains the complete 299 ** state of the virtual machine. 300 ** 301 ** The "sqlite3_stmt" structure pointer that is returned by sqlite3_prepare() 302 ** is really a pointer to an instance of this structure. 303 ** 304 ** The Vdbe.inVtabMethod variable is set to non-zero for the duration of 305 ** any virtual table method invocations made by the vdbe program. It is 306 ** set to 2 for xDestroy method calls and 1 for all other methods. This 307 ** variable is used for two purposes: to allow xDestroy methods to execute 308 ** "DROP TABLE" statements and to prevent some nasty side effects of 309 ** malloc failure when SQLite is invoked recursively by a virtual table 310 ** method function. 311 */ 312 struct Vdbe { 313 sqlite3 *db; /* The database connection that owns this statement */ 314 Op *aOp; /* Space to hold the virtual machine's program */ 315 Mem *aMem; /* The memory locations */ 316 Mem **apArg; /* Arguments to currently executing user function */ 317 Mem *aColName; /* Column names to return */ 318 Mem *pResultSet; /* Pointer to an array of results */ 319 Parse *pParse; /* Parsing context used to create this Vdbe */ 320 int nMem; /* Number of memory locations currently allocated */ 321 int nOp; /* Number of instructions in the program */ 322 int nCursor; /* Number of slots in apCsr[] */ 323 u32 magic; /* Magic number for sanity checking */ 324 char *zErrMsg; /* Error message written here */ 325 Vdbe *pPrev,*pNext; /* Linked list of VDBEs with the same Vdbe.db */ 326 VdbeCursor **apCsr; /* One element of this array for each open cursor */ 327 Mem *aVar; /* Values for the OP_Variable opcode. */ 328 char **azVar; /* Name of variables */ 329 ynVar nVar; /* Number of entries in aVar[] */ 330 ynVar nzVar; /* Number of entries in azVar[] */ 331 u32 cacheCtr; /* VdbeCursor row cache generation counter */ 332 int pc; /* The program counter */ 333 int rc; /* Value to return */ 334 u16 nResColumn; /* Number of columns in one row of the result set */ 335 u8 errorAction; /* Recovery action to do in case of an error */ 336 u8 minWriteFileFormat; /* Minimum file format for writable database files */ 337 bft explain:2; /* True if EXPLAIN present on SQL command */ 338 bft inVtabMethod:2; /* See comments above */ 339 bft changeCntOn:1; /* True to update the change-counter */ 340 bft expired:1; /* True if the VM needs to be recompiled */ 341 bft runOnlyOnce:1; /* Automatically expire on reset */ 342 bft usesStmtJournal:1; /* True if uses a statement journal */ 343 bft readOnly:1; /* True for statements that do not write */ 344 bft bIsReader:1; /* True for statements that read */ 345 bft isPrepareV2:1; /* True if prepared with prepare_v2() */ 346 bft doingRerun:1; /* True if rerunning after an auto-reprepare */ 347 int nChange; /* Number of db changes made since last reset */ 348 yDbMask btreeMask; /* Bitmask of db->aDb[] entries referenced */ 349 yDbMask lockMask; /* Subset of btreeMask that requires a lock */ 350 int iStatement; /* Statement number (or 0 if has not opened stmt) */ 351 u32 aCounter[5]; /* Counters used by sqlite3_stmt_status() */ 352 #ifndef SQLITE_OMIT_TRACE 353 i64 startTime; /* Time when query started - used for profiling */ 354 #endif 355 i64 iCurrentTime; /* Value of julianday('now') for this statement */ 356 i64 nFkConstraint; /* Number of imm. FK constraints this VM */ 357 i64 nStmtDefCons; /* Number of def. constraints when stmt started */ 358 i64 nStmtDefImmCons; /* Number of def. imm constraints when stmt started */ 359 char *zSql; /* Text of the SQL statement that generated this */ 360 void *pFree; /* Free this when deleting the vdbe */ 361 #ifdef SQLITE_ENABLE_TREE_EXPLAIN 362 Explain *pExplain; /* The explainer */ 363 char *zExplain; /* Explanation of data structures */ 364 #endif 365 VdbeFrame *pFrame; /* Parent frame */ 366 VdbeFrame *pDelFrame; /* List of frame objects to free on VM reset */ 367 int nFrame; /* Number of frames in pFrame list */ 368 u32 expmask; /* Binding to these vars invalidates VM */ 369 SubProgram *pProgram; /* Linked list of all sub-programs used by VM */ 370 int nOnceFlag; /* Size of array aOnceFlag[] */ 371 u8 *aOnceFlag; /* Flags for OP_Once */ 372 AuxData *pAuxData; /* Linked list of auxdata allocations */ 373 }; 374 375 /* 376 ** The following are allowed values for Vdbe.magic 377 */ 378 #define VDBE_MAGIC_INIT 0x26bceaa5 /* Building a VDBE program */ 379 #define VDBE_MAGIC_RUN 0xbdf20da3 /* VDBE is ready to execute */ 380 #define VDBE_MAGIC_HALT 0x519c2973 /* VDBE has completed execution */ 381 #define VDBE_MAGIC_DEAD 0xb606c3c8 /* The VDBE has been deallocated */ 382 383 /* 384 ** Function prototypes 385 */ 386 void sqlite3VdbeFreeCursor(Vdbe *, VdbeCursor*); 387 void sqliteVdbePopStack(Vdbe*,int); 388 int sqlite3VdbeCursorMoveto(VdbeCursor*); 389 #if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE) 390 void sqlite3VdbePrintOp(FILE*, int, Op*); 391 #endif 392 u32 sqlite3VdbeSerialTypeLen(u32); 393 u32 sqlite3VdbeSerialType(Mem*, int); 394 u32 sqlite3VdbeSerialPut(unsigned char*, Mem*, u32); 395 u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*); 396 void sqlite3VdbeDeleteAuxData(Vdbe*, int, int); 397 398 int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *); 399 int sqlite3VdbeIdxKeyCompare(VdbeCursor*,UnpackedRecord*,int*); 400 int sqlite3VdbeIdxRowid(sqlite3*, BtCursor *, i64 *); 401 int sqlite3VdbeExec(Vdbe*); 402 int sqlite3VdbeList(Vdbe*); 403 int sqlite3VdbeHalt(Vdbe*); 404 int sqlite3VdbeChangeEncoding(Mem *, int); 405 int sqlite3VdbeMemTooBig(Mem*); 406 int sqlite3VdbeMemCopy(Mem*, const Mem*); 407 void sqlite3VdbeMemShallowCopy(Mem*, const Mem*, int); 408 void sqlite3VdbeMemMove(Mem*, Mem*); 409 int sqlite3VdbeMemNulTerminate(Mem*); 410 int sqlite3VdbeMemSetStr(Mem*, const char*, int, u8, void(*)(void*)); 411 void sqlite3VdbeMemSetInt64(Mem*, i64); 412 #ifdef SQLITE_OMIT_FLOATING_POINT 413 # define sqlite3VdbeMemSetDouble sqlite3VdbeMemSetInt64 414 #else 415 void sqlite3VdbeMemSetDouble(Mem*, double); 416 #endif 417 void sqlite3VdbeMemSetNull(Mem*); 418 void sqlite3VdbeMemSetZeroBlob(Mem*,int); 419 void sqlite3VdbeMemSetRowSet(Mem*); 420 int sqlite3VdbeMemMakeWriteable(Mem*); 421 int sqlite3VdbeMemStringify(Mem*, int); 422 i64 sqlite3VdbeIntValue(Mem*); 423 int sqlite3VdbeMemIntegerify(Mem*); 424 double sqlite3VdbeRealValue(Mem*); 425 void sqlite3VdbeIntegerAffinity(Mem*); 426 int sqlite3VdbeMemRealify(Mem*); 427 int sqlite3VdbeMemNumerify(Mem*); 428 int sqlite3VdbeMemFromBtree(BtCursor*,u32,u32,int,Mem*); 429 void sqlite3VdbeMemRelease(Mem *p); 430 void sqlite3VdbeMemReleaseExternal(Mem *p); 431 #define VdbeMemDynamic(X) \ 432 (((X)->flags&(MEM_Agg|MEM_Dyn|MEM_RowSet|MEM_Frame))!=0) 433 #define VdbeMemRelease(X) \ 434 if( VdbeMemDynamic(X) ) sqlite3VdbeMemReleaseExternal(X); 435 int sqlite3VdbeMemFinalize(Mem*, FuncDef*); 436 const char *sqlite3OpcodeName(int); 437 int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve); 438 int sqlite3VdbeCloseStatement(Vdbe *, int); 439 void sqlite3VdbeFrameDelete(VdbeFrame*); 440 int sqlite3VdbeFrameRestore(VdbeFrame *); 441 int sqlite3VdbeTransferError(Vdbe *p); 442 443 int sqlite3VdbeSorterInit(sqlite3 *, VdbeCursor *); 444 void sqlite3VdbeSorterReset(sqlite3 *, VdbeSorter *); 445 void sqlite3VdbeSorterClose(sqlite3 *, VdbeCursor *); 446 int sqlite3VdbeSorterRowkey(const VdbeCursor *, Mem *); 447 int sqlite3VdbeSorterNext(sqlite3 *, const VdbeCursor *, int *); 448 int sqlite3VdbeSorterRewind(sqlite3 *, const VdbeCursor *, int *); 449 int sqlite3VdbeSorterWrite(sqlite3 *, const VdbeCursor *, Mem *); 450 int sqlite3VdbeSorterCompare(const VdbeCursor *, Mem *, int, int *); 451 452 #if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE>0 453 void sqlite3VdbeEnter(Vdbe*); 454 void sqlite3VdbeLeave(Vdbe*); 455 #else 456 # define sqlite3VdbeEnter(X) 457 # define sqlite3VdbeLeave(X) 458 #endif 459 460 #ifdef SQLITE_DEBUG 461 void sqlite3VdbeMemAboutToChange(Vdbe*,Mem*); 462 int sqlite3VdbeCheckMemInvariants(Mem*); 463 #endif 464 465 #ifndef SQLITE_OMIT_FOREIGN_KEY 466 int sqlite3VdbeCheckFk(Vdbe *, int); 467 #else 468 # define sqlite3VdbeCheckFk(p,i) 0 469 #endif 470 471 int sqlite3VdbeMemTranslate(Mem*, u8); 472 #ifdef SQLITE_DEBUG 473 void sqlite3VdbePrintSql(Vdbe*); 474 void sqlite3VdbeMemPrettyPrint(Mem *pMem, char *zBuf); 475 #endif 476 int sqlite3VdbeMemHandleBom(Mem *pMem); 477 478 #ifndef SQLITE_OMIT_INCRBLOB 479 int sqlite3VdbeMemExpandBlob(Mem *); 480 #define ExpandBlob(P) (((P)->flags&MEM_Zero)?sqlite3VdbeMemExpandBlob(P):0) 481 #else 482 #define sqlite3VdbeMemExpandBlob(x) SQLITE_OK 483 #define ExpandBlob(P) SQLITE_OK 484 #endif 485 486 #endif /* !defined(_VDBEINT_H_) */ 487