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 ** 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 /* Opaque type used by the explainer */ 56 typedef struct Explain Explain; 57 58 /* Elements of the linked list at Vdbe.pAuxData */ 59 typedef struct AuxData AuxData; 60 61 /* 62 ** A cursor is a pointer into a single BTree within a database file. 63 ** The cursor can seek to a BTree entry with a particular key, or 64 ** loop over all entries of the Btree. You can also insert new BTree 65 ** entries or retrieve the key or data from the entry that the cursor 66 ** is currently pointing to. 67 ** 68 ** Cursors can also point to virtual tables, sorters, or "pseudo-tables". 69 ** A pseudo-table is a single-row table implemented by registers. 70 ** 71 ** Every cursor that the virtual machine has open is represented by an 72 ** instance of the following structure. 73 */ 74 struct VdbeCursor { 75 BtCursor *pCursor; /* The cursor structure of the backend */ 76 Btree *pBt; /* Separate file holding temporary table */ 77 KeyInfo *pKeyInfo; /* Info about index keys needed by index cursors */ 78 int seekResult; /* Result of previous sqlite3BtreeMoveto() */ 79 int pseudoTableReg; /* Register holding pseudotable content. */ 80 i16 nField; /* Number of fields in the header */ 81 u16 nHdrParsed; /* Number of header fields parsed so far */ 82 #ifdef SQLITE_DEBUG 83 u8 seekOp; /* Most recent seek operation on this cursor */ 84 #endif 85 i8 iDb; /* Index of cursor database in db->aDb[] (or -1) */ 86 u8 nullRow; /* True if pointing to a row with no data */ 87 u8 deferredMoveto; /* A call to sqlite3BtreeMoveto() is needed */ 88 Bool isEphemeral:1; /* True for an ephemeral table */ 89 Bool useRandomRowid:1;/* Generate new record numbers semi-randomly */ 90 Bool isTable:1; /* True if a table requiring integer keys */ 91 Bool isOrdered:1; /* True if the underlying table is BTREE_UNORDERED */ 92 Pgno pgnoRoot; /* Root page of the open btree cursor */ 93 sqlite3_vtab_cursor *pVtabCursor; /* The cursor for a virtual table */ 94 i64 seqCount; /* Sequence counter */ 95 i64 movetoTarget; /* Argument to the deferred sqlite3BtreeMoveto() */ 96 VdbeSorter *pSorter; /* Sorter object for OP_SorterOpen cursors */ 97 #ifdef SQLITE_ENABLE_COLUMN_USED_MASK 98 u64 maskUsed; /* Mask of columns used by this cursor */ 99 #endif 100 101 /* Cached information about the header for the data record that the 102 ** cursor is currently pointing to. Only valid if cacheStatus matches 103 ** Vdbe.cacheCtr. Vdbe.cacheCtr will never take on the value of 104 ** CACHE_STALE and so setting cacheStatus=CACHE_STALE guarantees that 105 ** the cache is out of date. 106 ** 107 ** aRow might point to (ephemeral) data for the current row, or it might 108 ** be NULL. 109 */ 110 u32 cacheStatus; /* Cache is valid if this matches Vdbe.cacheCtr */ 111 u32 payloadSize; /* Total number of bytes in the record */ 112 u32 szRow; /* Byte available in aRow */ 113 u32 iHdrOffset; /* Offset to next unparsed byte of the header */ 114 const u8 *aRow; /* Data for the current row, if all on one page */ 115 u32 *aOffset; /* Pointer to aType[nField] */ 116 u32 aType[1]; /* Type values for all entries in the record */ 117 /* 2*nField extra array elements allocated for aType[], beyond the one 118 ** static element declared in the structure. nField total array slots for 119 ** aType[] and nField+1 array slots for aOffset[] */ 120 }; 121 typedef struct VdbeCursor VdbeCursor; 122 123 /* 124 ** When a sub-program is executed (OP_Program), a structure of this type 125 ** is allocated to store the current value of the program counter, as 126 ** well as the current memory cell array and various other frame specific 127 ** values stored in the Vdbe struct. When the sub-program is finished, 128 ** these values are copied back to the Vdbe from the VdbeFrame structure, 129 ** restoring the state of the VM to as it was before the sub-program 130 ** began executing. 131 ** 132 ** The memory for a VdbeFrame object is allocated and managed by a memory 133 ** cell in the parent (calling) frame. When the memory cell is deleted or 134 ** overwritten, the VdbeFrame object is not freed immediately. Instead, it 135 ** is linked into the Vdbe.pDelFrame list. The contents of the Vdbe.pDelFrame 136 ** list is deleted when the VM is reset in VdbeHalt(). The reason for doing 137 ** this instead of deleting the VdbeFrame immediately is to avoid recursive 138 ** calls to sqlite3VdbeMemRelease() when the memory cells belonging to the 139 ** child frame are released. 140 ** 141 ** The currently executing frame is stored in Vdbe.pFrame. Vdbe.pFrame is 142 ** set to NULL if the currently executing frame is the main program. 143 */ 144 typedef struct VdbeFrame VdbeFrame; 145 struct VdbeFrame { 146 Vdbe *v; /* VM this frame belongs to */ 147 VdbeFrame *pParent; /* Parent of this frame, or NULL if parent is main */ 148 Op *aOp; /* Program instructions for parent frame */ 149 i64 *anExec; /* Event counters from parent frame */ 150 Mem *aMem; /* Array of memory cells for parent frame */ 151 u8 *aOnceFlag; /* Array of OP_Once flags for parent frame */ 152 VdbeCursor **apCsr; /* Array of Vdbe cursors for parent frame */ 153 void *token; /* Copy of SubProgram.token */ 154 i64 lastRowid; /* Last insert rowid (sqlite3.lastRowid) */ 155 int nCursor; /* Number of entries in apCsr */ 156 int pc; /* Program Counter in parent (calling) frame */ 157 int nOp; /* Size of aOp array */ 158 int nMem; /* Number of entries in aMem */ 159 int nOnceFlag; /* Number of entries in aOnceFlag */ 160 int nChildMem; /* Number of memory cells for child frame */ 161 int nChildCsr; /* Number of cursors for child frame */ 162 int nChange; /* Statement changes (Vdbe.nChange) */ 163 int nDbChange; /* Value of db->nChange */ 164 }; 165 166 #define VdbeFrameMem(p) ((Mem *)&((u8 *)p)[ROUND8(sizeof(VdbeFrame))]) 167 168 /* 169 ** A value for VdbeCursor.cacheValid that means the cache is always invalid. 170 */ 171 #define CACHE_STALE 0 172 173 /* 174 ** Internally, the vdbe manipulates nearly all SQL values as Mem 175 ** structures. Each Mem struct may cache multiple representations (string, 176 ** integer etc.) of the same value. 177 */ 178 struct Mem { 179 union MemValue { 180 double r; /* Real value used when MEM_Real is set in flags */ 181 i64 i; /* Integer value used when MEM_Int is set in flags */ 182 int nZero; /* Used when bit MEM_Zero is set in flags */ 183 FuncDef *pDef; /* Used only when flags==MEM_Agg */ 184 RowSet *pRowSet; /* Used only when flags==MEM_RowSet */ 185 VdbeFrame *pFrame; /* Used when flags==MEM_Frame */ 186 } u; 187 u16 flags; /* Some combination of MEM_Null, MEM_Str, MEM_Dyn, etc. */ 188 u8 enc; /* SQLITE_UTF8, SQLITE_UTF16BE, SQLITE_UTF16LE */ 189 u8 eSubtype; /* Subtype for this value */ 190 int n; /* Number of characters in string value, excluding '\0' */ 191 char *z; /* String or BLOB value */ 192 /* ShallowCopy only needs to copy the information above */ 193 char *zMalloc; /* Space to hold MEM_Str or MEM_Blob if szMalloc>0 */ 194 int szMalloc; /* Size of the zMalloc allocation */ 195 u32 uTemp; /* Transient storage for serial_type in OP_MakeRecord */ 196 sqlite3 *db; /* The associated database connection */ 197 void (*xDel)(void*);/* Destructor for Mem.z - only valid if MEM_Dyn */ 198 #ifdef SQLITE_DEBUG 199 Mem *pScopyFrom; /* This Mem is a shallow copy of pScopyFrom */ 200 void *pFiller; /* So that sizeof(Mem) is a multiple of 8 */ 201 #endif 202 }; 203 204 /* 205 ** Size of struct Mem not including the Mem.zMalloc member or anything that 206 ** follows. 207 */ 208 #define MEMCELLSIZE offsetof(Mem,zMalloc) 209 210 /* One or more of the following flags are set to indicate the validOK 211 ** representations of the value stored in the Mem struct. 212 ** 213 ** If the MEM_Null flag is set, then the value is an SQL NULL value. 214 ** No other flags may be set in this case. 215 ** 216 ** If the MEM_Str flag is set then Mem.z points at a string representation. 217 ** Usually this is encoded in the same unicode encoding as the main 218 ** database (see below for exceptions). If the MEM_Term flag is also 219 ** set, then the string is nul terminated. The MEM_Int and MEM_Real 220 ** flags may coexist with the MEM_Str flag. 221 */ 222 #define MEM_Null 0x0001 /* Value is NULL */ 223 #define MEM_Str 0x0002 /* Value is a string */ 224 #define MEM_Int 0x0004 /* Value is an integer */ 225 #define MEM_Real 0x0008 /* Value is a real number */ 226 #define MEM_Blob 0x0010 /* Value is a BLOB */ 227 #define MEM_AffMask 0x001f /* Mask of affinity bits */ 228 #define MEM_RowSet 0x0020 /* Value is a RowSet object */ 229 #define MEM_Frame 0x0040 /* Value is a VdbeFrame object */ 230 #define MEM_Undefined 0x0080 /* Value is undefined */ 231 #define MEM_Cleared 0x0100 /* NULL set by OP_Null, not from data */ 232 #define MEM_TypeMask 0x01ff /* Mask of type bits */ 233 234 235 /* Whenever Mem contains a valid string or blob representation, one of 236 ** the following flags must be set to determine the memory management 237 ** policy for Mem.z. The MEM_Term flag tells us whether or not the 238 ** string is \000 or \u0000 terminated 239 */ 240 #define MEM_Term 0x0200 /* String rep is nul terminated */ 241 #define MEM_Dyn 0x0400 /* Need to call Mem.xDel() on Mem.z */ 242 #define MEM_Static 0x0800 /* Mem.z points to a static string */ 243 #define MEM_Ephem 0x1000 /* Mem.z points to an ephemeral string */ 244 #define MEM_Agg 0x2000 /* Mem.z points to an agg function context */ 245 #define MEM_Zero 0x4000 /* Mem.i contains count of 0s appended to blob */ 246 #ifdef SQLITE_OMIT_INCRBLOB 247 #undef MEM_Zero 248 #define MEM_Zero 0x0000 249 #endif 250 251 /* 252 ** Clear any existing type flags from a Mem and replace them with f 253 */ 254 #define MemSetTypeFlag(p, f) \ 255 ((p)->flags = ((p)->flags&~(MEM_TypeMask|MEM_Zero))|f) 256 257 /* 258 ** Return true if a memory cell is not marked as invalid. This macro 259 ** is for use inside assert() statements only. 260 */ 261 #ifdef SQLITE_DEBUG 262 #define memIsValid(M) ((M)->flags & MEM_Undefined)==0 263 #endif 264 265 /* 266 ** Each auxiliary data pointer stored by a user defined function 267 ** implementation calling sqlite3_set_auxdata() is stored in an instance 268 ** of this structure. All such structures associated with a single VM 269 ** are stored in a linked list headed at Vdbe.pAuxData. All are destroyed 270 ** when the VM is halted (if not before). 271 */ 272 struct AuxData { 273 int iOp; /* Instruction number of OP_Function opcode */ 274 int iArg; /* Index of function argument. */ 275 void *pAux; /* Aux data pointer */ 276 void (*xDelete)(void *); /* Destructor for the aux data */ 277 AuxData *pNext; /* Next element in list */ 278 }; 279 280 /* 281 ** The "context" argument for an installable function. A pointer to an 282 ** instance of this structure is the first argument to the routines used 283 ** implement the SQL functions. 284 ** 285 ** There is a typedef for this structure in sqlite.h. So all routines, 286 ** even the public interface to SQLite, can use a pointer to this structure. 287 ** But this file is the only place where the internal details of this 288 ** structure are known. 289 ** 290 ** This structure is defined inside of vdbeInt.h because it uses substructures 291 ** (Mem) which are only defined there. 292 */ 293 struct sqlite3_context { 294 Mem *pOut; /* The return value is stored here */ 295 FuncDef *pFunc; /* Pointer to function information */ 296 Mem *pMem; /* Memory cell used to store aggregate context */ 297 Vdbe *pVdbe; /* The VM that owns this context */ 298 int iOp; /* Instruction number of OP_Function */ 299 int isError; /* Error code returned by the function. */ 300 u8 skipFlag; /* Skip accumulator loading if true */ 301 u8 fErrorOrAux; /* isError!=0 or pVdbe->pAuxData modified */ 302 u8 argc; /* Number of arguments */ 303 sqlite3_value *argv[1]; /* Argument set */ 304 }; 305 306 /* 307 ** An Explain object accumulates indented output which is helpful 308 ** in describing recursive data structures. 309 */ 310 struct Explain { 311 Vdbe *pVdbe; /* Attach the explanation to this Vdbe */ 312 StrAccum str; /* The string being accumulated */ 313 int nIndent; /* Number of elements in aIndent */ 314 u16 aIndent[100]; /* Levels of indentation */ 315 char zBase[100]; /* Initial space */ 316 }; 317 318 /* A bitfield type for use inside of structures. Always follow with :N where 319 ** N is the number of bits. 320 */ 321 typedef unsigned bft; /* Bit Field Type */ 322 323 typedef struct ScanStatus ScanStatus; 324 struct ScanStatus { 325 int addrExplain; /* OP_Explain for loop */ 326 int addrLoop; /* Address of "loops" counter */ 327 int addrVisit; /* Address of "rows visited" counter */ 328 int iSelectID; /* The "Select-ID" for this loop */ 329 LogEst nEst; /* Estimated output rows per loop */ 330 char *zName; /* Name of table or index */ 331 }; 332 333 /* 334 ** An instance of the virtual machine. This structure contains the complete 335 ** state of the virtual machine. 336 ** 337 ** The "sqlite3_stmt" structure pointer that is returned by sqlite3_prepare() 338 ** is really a pointer to an instance of this structure. 339 */ 340 struct Vdbe { 341 sqlite3 *db; /* The database connection that owns this statement */ 342 Op *aOp; /* Space to hold the virtual machine's program */ 343 Mem *aMem; /* The memory locations */ 344 Mem **apArg; /* Arguments to currently executing user function */ 345 Mem *aColName; /* Column names to return */ 346 Mem *pResultSet; /* Pointer to an array of results */ 347 Parse *pParse; /* Parsing context used to create this Vdbe */ 348 int nMem; /* Number of memory locations currently allocated */ 349 int nOp; /* Number of instructions in the program */ 350 int nCursor; /* Number of slots in apCsr[] */ 351 u32 magic; /* Magic number for sanity checking */ 352 char *zErrMsg; /* Error message written here */ 353 Vdbe *pPrev,*pNext; /* Linked list of VDBEs with the same Vdbe.db */ 354 VdbeCursor **apCsr; /* One element of this array for each open cursor */ 355 Mem *aVar; /* Values for the OP_Variable opcode. */ 356 char **azVar; /* Name of variables */ 357 ynVar nVar; /* Number of entries in aVar[] */ 358 ynVar nzVar; /* Number of entries in azVar[] */ 359 u32 cacheCtr; /* VdbeCursor row cache generation counter */ 360 int pc; /* The program counter */ 361 int rc; /* Value to return */ 362 #ifdef SQLITE_DEBUG 363 int rcApp; /* errcode set by sqlite3_result_error_code() */ 364 #endif 365 u16 nResColumn; /* Number of columns in one row of the result set */ 366 u8 errorAction; /* Recovery action to do in case of an error */ 367 u8 minWriteFileFormat; /* Minimum file format for writable database files */ 368 bft explain:2; /* True if EXPLAIN present on SQL command */ 369 bft changeCntOn:1; /* True to update the change-counter */ 370 bft expired:1; /* True if the VM needs to be recompiled */ 371 bft runOnlyOnce:1; /* Automatically expire on reset */ 372 bft usesStmtJournal:1; /* True if uses a statement journal */ 373 bft readOnly:1; /* True for statements that do not write */ 374 bft bIsReader:1; /* True for statements that read */ 375 bft isPrepareV2:1; /* True if prepared with prepare_v2() */ 376 bft doingRerun:1; /* True if rerunning after an auto-reprepare */ 377 int nChange; /* Number of db changes made since last reset */ 378 yDbMask btreeMask; /* Bitmask of db->aDb[] entries referenced */ 379 yDbMask lockMask; /* Subset of btreeMask that requires a lock */ 380 int iStatement; /* Statement number (or 0 if has not opened stmt) */ 381 u32 aCounter[5]; /* Counters used by sqlite3_stmt_status() */ 382 #ifndef SQLITE_OMIT_TRACE 383 i64 startTime; /* Time when query started - used for profiling */ 384 #endif 385 i64 iCurrentTime; /* Value of julianday('now') for this statement */ 386 i64 nFkConstraint; /* Number of imm. FK constraints this VM */ 387 i64 nStmtDefCons; /* Number of def. constraints when stmt started */ 388 i64 nStmtDefImmCons; /* Number of def. imm constraints when stmt started */ 389 char *zSql; /* Text of the SQL statement that generated this */ 390 void *pFree; /* Free this when deleting the vdbe */ 391 VdbeFrame *pFrame; /* Parent frame */ 392 VdbeFrame *pDelFrame; /* List of frame objects to free on VM reset */ 393 int nFrame; /* Number of frames in pFrame list */ 394 u32 expmask; /* Binding to these vars invalidates VM */ 395 SubProgram *pProgram; /* Linked list of all sub-programs used by VM */ 396 int nOnceFlag; /* Size of array aOnceFlag[] */ 397 u8 *aOnceFlag; /* Flags for OP_Once */ 398 AuxData *pAuxData; /* Linked list of auxdata allocations */ 399 #ifdef SQLITE_ENABLE_STMT_SCANSTATUS 400 i64 *anExec; /* Number of times each op has been executed */ 401 int nScan; /* Entries in aScan[] */ 402 ScanStatus *aScan; /* Scan definitions for sqlite3_stmt_scanstatus() */ 403 #endif 404 }; 405 406 /* 407 ** The following are allowed values for Vdbe.magic 408 */ 409 #define VDBE_MAGIC_INIT 0x26bceaa5 /* Building a VDBE program */ 410 #define VDBE_MAGIC_RUN 0xbdf20da3 /* VDBE is ready to execute */ 411 #define VDBE_MAGIC_HALT 0x519c2973 /* VDBE has completed execution */ 412 #define VDBE_MAGIC_DEAD 0xb606c3c8 /* The VDBE has been deallocated */ 413 414 /* 415 ** Function prototypes 416 */ 417 void sqlite3VdbeError(Vdbe*, const char *, ...); 418 void sqlite3VdbeFreeCursor(Vdbe *, VdbeCursor*); 419 void sqliteVdbePopStack(Vdbe*,int); 420 int sqlite3VdbeCursorMoveto(VdbeCursor*); 421 int sqlite3VdbeCursorRestore(VdbeCursor*); 422 #if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE) 423 void sqlite3VdbePrintOp(FILE*, int, Op*); 424 #endif 425 u32 sqlite3VdbeSerialTypeLen(u32); 426 u8 sqlite3VdbeOneByteSerialTypeLen(u8); 427 u32 sqlite3VdbeSerialType(Mem*, int, u32*); 428 u32 sqlite3VdbeSerialPut(unsigned char*, Mem*, u32); 429 u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*); 430 void sqlite3VdbeDeleteAuxData(Vdbe*, int, int); 431 432 int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *); 433 int sqlite3VdbeIdxKeyCompare(sqlite3*,VdbeCursor*,UnpackedRecord*,int*); 434 int sqlite3VdbeIdxRowid(sqlite3*, BtCursor*, i64*); 435 int sqlite3VdbeExec(Vdbe*); 436 int sqlite3VdbeList(Vdbe*); 437 int sqlite3VdbeHalt(Vdbe*); 438 int sqlite3VdbeChangeEncoding(Mem *, int); 439 int sqlite3VdbeMemTooBig(Mem*); 440 int sqlite3VdbeMemCopy(Mem*, const Mem*); 441 void sqlite3VdbeMemShallowCopy(Mem*, const Mem*, int); 442 void sqlite3VdbeMemMove(Mem*, Mem*); 443 int sqlite3VdbeMemNulTerminate(Mem*); 444 int sqlite3VdbeMemSetStr(Mem*, const char*, int, u8, void(*)(void*)); 445 void sqlite3VdbeMemSetInt64(Mem*, i64); 446 #ifdef SQLITE_OMIT_FLOATING_POINT 447 # define sqlite3VdbeMemSetDouble sqlite3VdbeMemSetInt64 448 #else 449 void sqlite3VdbeMemSetDouble(Mem*, double); 450 #endif 451 void sqlite3VdbeMemInit(Mem*,sqlite3*,u16); 452 void sqlite3VdbeMemSetNull(Mem*); 453 void sqlite3VdbeMemSetZeroBlob(Mem*,int); 454 void sqlite3VdbeMemSetRowSet(Mem*); 455 int sqlite3VdbeMemMakeWriteable(Mem*); 456 int sqlite3VdbeMemStringify(Mem*, u8, u8); 457 i64 sqlite3VdbeIntValue(Mem*); 458 int sqlite3VdbeMemIntegerify(Mem*); 459 double sqlite3VdbeRealValue(Mem*); 460 void sqlite3VdbeIntegerAffinity(Mem*); 461 int sqlite3VdbeMemRealify(Mem*); 462 int sqlite3VdbeMemNumerify(Mem*); 463 void sqlite3VdbeMemCast(Mem*,u8,u8); 464 int sqlite3VdbeMemFromBtree(BtCursor*,u32,u32,int,Mem*); 465 void sqlite3VdbeMemRelease(Mem *p); 466 #define VdbeMemDynamic(X) \ 467 (((X)->flags&(MEM_Agg|MEM_Dyn|MEM_RowSet|MEM_Frame))!=0) 468 int sqlite3VdbeMemFinalize(Mem*, FuncDef*); 469 const char *sqlite3OpcodeName(int); 470 int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve); 471 int sqlite3VdbeMemClearAndResize(Mem *pMem, int n); 472 int sqlite3VdbeCloseStatement(Vdbe *, int); 473 void sqlite3VdbeFrameDelete(VdbeFrame*); 474 int sqlite3VdbeFrameRestore(VdbeFrame *); 475 int sqlite3VdbeTransferError(Vdbe *p); 476 477 int sqlite3VdbeSorterInit(sqlite3 *, int, VdbeCursor *); 478 void sqlite3VdbeSorterReset(sqlite3 *, VdbeSorter *); 479 void sqlite3VdbeSorterClose(sqlite3 *, VdbeCursor *); 480 int sqlite3VdbeSorterRowkey(const VdbeCursor *, Mem *); 481 int sqlite3VdbeSorterNext(sqlite3 *, const VdbeCursor *, int *); 482 int sqlite3VdbeSorterRewind(const VdbeCursor *, int *); 483 int sqlite3VdbeSorterWrite(const VdbeCursor *, Mem *); 484 int sqlite3VdbeSorterCompare(const VdbeCursor *, Mem *, int, int *); 485 486 #if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE>0 487 void sqlite3VdbeEnter(Vdbe*); 488 void sqlite3VdbeLeave(Vdbe*); 489 #else 490 # define sqlite3VdbeEnter(X) 491 # define sqlite3VdbeLeave(X) 492 #endif 493 494 #ifdef SQLITE_DEBUG 495 void sqlite3VdbeMemAboutToChange(Vdbe*,Mem*); 496 int sqlite3VdbeCheckMemInvariants(Mem*); 497 #endif 498 499 #ifndef SQLITE_OMIT_FOREIGN_KEY 500 int sqlite3VdbeCheckFk(Vdbe *, int); 501 #else 502 # define sqlite3VdbeCheckFk(p,i) 0 503 #endif 504 505 int sqlite3VdbeMemTranslate(Mem*, u8); 506 #ifdef SQLITE_DEBUG 507 void sqlite3VdbePrintSql(Vdbe*); 508 void sqlite3VdbeMemPrettyPrint(Mem *pMem, char *zBuf); 509 #endif 510 int sqlite3VdbeMemHandleBom(Mem *pMem); 511 512 #ifndef SQLITE_OMIT_INCRBLOB 513 int sqlite3VdbeMemExpandBlob(Mem *); 514 #define ExpandBlob(P) (((P)->flags&MEM_Zero)?sqlite3VdbeMemExpandBlob(P):0) 515 #else 516 #define sqlite3VdbeMemExpandBlob(x) SQLITE_OK 517 #define ExpandBlob(P) SQLITE_OK 518 #endif 519 520 #endif /* !defined(_VDBEINT_H_) */ 521