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 /* Types of VDBE cursors */ 62 #define CURTYPE_BTREE 0 63 #define CURTYPE_SORTER 1 64 #define CURTYPE_VTAB 2 65 #define CURTYPE_PSEUDO 3 66 67 /* 68 ** A VdbeCursor is an superclass (a wrapper) for various cursor objects: 69 ** 70 ** * A b-tree cursor 71 ** - In the main database or in an ephemeral database 72 ** - On either an index or a table 73 ** * A sorter 74 ** * A virtual table 75 ** * A one-row "pseudotable" stored in a single register 76 */ 77 struct VdbeCursor { 78 u8 eCurType; /* One of the CURTYPE_* values above */ 79 i8 iDb; /* Index of cursor database in db->aDb[] (or -1) */ 80 u8 nullRow; /* True if pointing to a row with no data */ 81 u8 deferredMoveto; /* A call to sqlite3BtreeMoveto() is needed */ 82 u8 isTable; /* True for rowid tables. False for indexes */ 83 #ifdef SQLITE_DEBUG 84 u8 seekOp; /* Most recent seek operation on this cursor */ 85 #endif 86 Bool isEphemeral:1; /* True for an ephemeral table */ 87 Bool useRandomRowid:1;/* Generate new record numbers semi-randomly */ 88 Bool isOrdered:1; /* True if the underlying table is BTREE_UNORDERED */ 89 Pgno pgnoRoot; /* Root page of the open btree cursor */ 90 i16 nField; /* Number of fields in the header */ 91 u16 nHdrParsed; /* Number of header fields parsed so far */ 92 union { 93 BtCursor *pCursor; /* CURTYPE_BTREE. Btree cursor */ 94 sqlite3_vtab_cursor *pVCur; /* CURTYPE_VTAB. Vtab cursor */ 95 int pseudoTableReg; /* CURTYPE_PSEUDO. Reg holding content. */ 96 VdbeSorter *pSorter; /* CURTYPE_SORTER. Sorter object */ 97 } uc; 98 Btree *pBt; /* Separate file holding temporary table */ 99 KeyInfo *pKeyInfo; /* Info about index keys needed by index cursors */ 100 int seekResult; /* Result of previous sqlite3BtreeMoveto() */ 101 i64 seqCount; /* Sequence counter */ 102 i64 movetoTarget; /* Argument to the deferred sqlite3BtreeMoveto() */ 103 #ifdef SQLITE_ENABLE_COLUMN_USED_MASK 104 u64 maskUsed; /* Mask of columns used by this cursor */ 105 #endif 106 107 /* Cached information about the header for the data record that the 108 ** cursor is currently pointing to. Only valid if cacheStatus matches 109 ** Vdbe.cacheCtr. Vdbe.cacheCtr will never take on the value of 110 ** CACHE_STALE and so setting cacheStatus=CACHE_STALE guarantees that 111 ** the cache is out of date. 112 ** 113 ** aRow might point to (ephemeral) data for the current row, or it might 114 ** be NULL. 115 */ 116 u32 cacheStatus; /* Cache is valid if this matches Vdbe.cacheCtr */ 117 u32 payloadSize; /* Total number of bytes in the record */ 118 u32 szRow; /* Byte available in aRow */ 119 u32 iHdrOffset; /* Offset to next unparsed byte of the header */ 120 const u8 *aRow; /* Data for the current row, if all on one page */ 121 u32 *aOffset; /* Pointer to aType[nField] */ 122 u32 aType[1]; /* Type values for all entries in the record */ 123 /* 2*nField extra array elements allocated for aType[], beyond the one 124 ** static element declared in the structure. nField total array slots for 125 ** aType[] and nField+1 array slots for aOffset[] */ 126 }; 127 typedef struct VdbeCursor VdbeCursor; 128 129 /* 130 ** When a sub-program is executed (OP_Program), a structure of this type 131 ** is allocated to store the current value of the program counter, as 132 ** well as the current memory cell array and various other frame specific 133 ** values stored in the Vdbe struct. When the sub-program is finished, 134 ** these values are copied back to the Vdbe from the VdbeFrame structure, 135 ** restoring the state of the VM to as it was before the sub-program 136 ** began executing. 137 ** 138 ** The memory for a VdbeFrame object is allocated and managed by a memory 139 ** cell in the parent (calling) frame. When the memory cell is deleted or 140 ** overwritten, the VdbeFrame object is not freed immediately. Instead, it 141 ** is linked into the Vdbe.pDelFrame list. The contents of the Vdbe.pDelFrame 142 ** list is deleted when the VM is reset in VdbeHalt(). The reason for doing 143 ** this instead of deleting the VdbeFrame immediately is to avoid recursive 144 ** calls to sqlite3VdbeMemRelease() when the memory cells belonging to the 145 ** child frame are released. 146 ** 147 ** The currently executing frame is stored in Vdbe.pFrame. Vdbe.pFrame is 148 ** set to NULL if the currently executing frame is the main program. 149 */ 150 typedef struct VdbeFrame VdbeFrame; 151 struct VdbeFrame { 152 Vdbe *v; /* VM this frame belongs to */ 153 VdbeFrame *pParent; /* Parent of this frame, or NULL if parent is main */ 154 Op *aOp; /* Program instructions for parent frame */ 155 i64 *anExec; /* Event counters from parent frame */ 156 Mem *aMem; /* Array of memory cells for parent frame */ 157 u8 *aOnceFlag; /* Array of OP_Once flags for parent frame */ 158 VdbeCursor **apCsr; /* Array of Vdbe cursors for parent frame */ 159 void *token; /* Copy of SubProgram.token */ 160 i64 lastRowid; /* Last insert rowid (sqlite3.lastRowid) */ 161 int nCursor; /* Number of entries in apCsr */ 162 int pc; /* Program Counter in parent (calling) frame */ 163 int nOp; /* Size of aOp array */ 164 int nMem; /* Number of entries in aMem */ 165 int nOnceFlag; /* Number of entries in aOnceFlag */ 166 int nChildMem; /* Number of memory cells for child frame */ 167 int nChildCsr; /* Number of cursors for child frame */ 168 int nChange; /* Statement changes (Vdbe.nChange) */ 169 int nDbChange; /* Value of db->nChange */ 170 }; 171 172 #define VdbeFrameMem(p) ((Mem *)&((u8 *)p)[ROUND8(sizeof(VdbeFrame))]) 173 174 /* 175 ** A value for VdbeCursor.cacheValid that means the cache is always invalid. 176 */ 177 #define CACHE_STALE 0 178 179 /* 180 ** Internally, the vdbe manipulates nearly all SQL values as Mem 181 ** structures. Each Mem struct may cache multiple representations (string, 182 ** integer etc.) of the same value. 183 */ 184 struct Mem { 185 union MemValue { 186 double r; /* Real value used when MEM_Real is set in flags */ 187 i64 i; /* Integer value used when MEM_Int is set in flags */ 188 int nZero; /* Used when bit MEM_Zero is set in flags */ 189 FuncDef *pDef; /* Used only when flags==MEM_Agg */ 190 RowSet *pRowSet; /* Used only when flags==MEM_RowSet */ 191 VdbeFrame *pFrame; /* Used when flags==MEM_Frame */ 192 } u; 193 u16 flags; /* Some combination of MEM_Null, MEM_Str, MEM_Dyn, etc. */ 194 u8 enc; /* SQLITE_UTF8, SQLITE_UTF16BE, SQLITE_UTF16LE */ 195 u8 eSubtype; /* Subtype for this value */ 196 int n; /* Number of characters in string value, excluding '\0' */ 197 char *z; /* String or BLOB value */ 198 /* ShallowCopy only needs to copy the information above */ 199 char *zMalloc; /* Space to hold MEM_Str or MEM_Blob if szMalloc>0 */ 200 int szMalloc; /* Size of the zMalloc allocation */ 201 u32 uTemp; /* Transient storage for serial_type in OP_MakeRecord */ 202 sqlite3 *db; /* The associated database connection */ 203 void (*xDel)(void*);/* Destructor for Mem.z - only valid if MEM_Dyn */ 204 #ifdef SQLITE_DEBUG 205 Mem *pScopyFrom; /* This Mem is a shallow copy of pScopyFrom */ 206 void *pFiller; /* So that sizeof(Mem) is a multiple of 8 */ 207 #endif 208 }; 209 210 /* 211 ** Size of struct Mem not including the Mem.zMalloc member or anything that 212 ** follows. 213 */ 214 #define MEMCELLSIZE offsetof(Mem,zMalloc) 215 216 /* One or more of the following flags are set to indicate the validOK 217 ** representations of the value stored in the Mem struct. 218 ** 219 ** If the MEM_Null flag is set, then the value is an SQL NULL value. 220 ** No other flags may be set in this case. 221 ** 222 ** If the MEM_Str flag is set then Mem.z points at a string representation. 223 ** Usually this is encoded in the same unicode encoding as the main 224 ** database (see below for exceptions). If the MEM_Term flag is also 225 ** set, then the string is nul terminated. The MEM_Int and MEM_Real 226 ** flags may coexist with the MEM_Str flag. 227 */ 228 #define MEM_Null 0x0001 /* Value is NULL */ 229 #define MEM_Str 0x0002 /* Value is a string */ 230 #define MEM_Int 0x0004 /* Value is an integer */ 231 #define MEM_Real 0x0008 /* Value is a real number */ 232 #define MEM_Blob 0x0010 /* Value is a BLOB */ 233 #define MEM_AffMask 0x001f /* Mask of affinity bits */ 234 #define MEM_RowSet 0x0020 /* Value is a RowSet object */ 235 #define MEM_Frame 0x0040 /* Value is a VdbeFrame object */ 236 #define MEM_Undefined 0x0080 /* Value is undefined */ 237 #define MEM_Cleared 0x0100 /* NULL set by OP_Null, not from data */ 238 #define MEM_TypeMask 0x01ff /* Mask of type bits */ 239 240 241 /* Whenever Mem contains a valid string or blob representation, one of 242 ** the following flags must be set to determine the memory management 243 ** policy for Mem.z. The MEM_Term flag tells us whether or not the 244 ** string is \000 or \u0000 terminated 245 */ 246 #define MEM_Term 0x0200 /* String rep is nul terminated */ 247 #define MEM_Dyn 0x0400 /* Need to call Mem.xDel() on Mem.z */ 248 #define MEM_Static 0x0800 /* Mem.z points to a static string */ 249 #define MEM_Ephem 0x1000 /* Mem.z points to an ephemeral string */ 250 #define MEM_Agg 0x2000 /* Mem.z points to an agg function context */ 251 #define MEM_Zero 0x4000 /* Mem.i contains count of 0s appended to blob */ 252 #ifdef SQLITE_OMIT_INCRBLOB 253 #undef MEM_Zero 254 #define MEM_Zero 0x0000 255 #endif 256 257 /* 258 ** Clear any existing type flags from a Mem and replace them with f 259 */ 260 #define MemSetTypeFlag(p, f) \ 261 ((p)->flags = ((p)->flags&~(MEM_TypeMask|MEM_Zero))|f) 262 263 /* 264 ** Return true if a memory cell is not marked as invalid. This macro 265 ** is for use inside assert() statements only. 266 */ 267 #ifdef SQLITE_DEBUG 268 #define memIsValid(M) ((M)->flags & MEM_Undefined)==0 269 #endif 270 271 /* 272 ** Each auxiliary data pointer stored by a user defined function 273 ** implementation calling sqlite3_set_auxdata() is stored in an instance 274 ** of this structure. All such structures associated with a single VM 275 ** are stored in a linked list headed at Vdbe.pAuxData. All are destroyed 276 ** when the VM is halted (if not before). 277 */ 278 struct AuxData { 279 int iOp; /* Instruction number of OP_Function opcode */ 280 int iArg; /* Index of function argument. */ 281 void *pAux; /* Aux data pointer */ 282 void (*xDelete)(void *); /* Destructor for the aux data */ 283 AuxData *pNext; /* Next element in list */ 284 }; 285 286 /* 287 ** The "context" argument for an installable function. A pointer to an 288 ** instance of this structure is the first argument to the routines used 289 ** implement the SQL functions. 290 ** 291 ** There is a typedef for this structure in sqlite.h. So all routines, 292 ** even the public interface to SQLite, can use a pointer to this structure. 293 ** But this file is the only place where the internal details of this 294 ** structure are known. 295 ** 296 ** This structure is defined inside of vdbeInt.h because it uses substructures 297 ** (Mem) which are only defined there. 298 */ 299 struct sqlite3_context { 300 Mem *pOut; /* The return value is stored here */ 301 FuncDef *pFunc; /* Pointer to function information */ 302 Mem *pMem; /* Memory cell used to store aggregate context */ 303 Vdbe *pVdbe; /* The VM that owns this context */ 304 int iOp; /* Instruction number of OP_Function */ 305 int isError; /* Error code returned by the function. */ 306 u8 skipFlag; /* Skip accumulator loading if true */ 307 u8 fErrorOrAux; /* isError!=0 or pVdbe->pAuxData modified */ 308 u8 argc; /* Number of arguments */ 309 sqlite3_value *argv[1]; /* Argument set */ 310 }; 311 312 /* 313 ** An Explain object accumulates indented output which is helpful 314 ** in describing recursive data structures. 315 */ 316 struct Explain { 317 Vdbe *pVdbe; /* Attach the explanation to this Vdbe */ 318 StrAccum str; /* The string being accumulated */ 319 int nIndent; /* Number of elements in aIndent */ 320 u16 aIndent[100]; /* Levels of indentation */ 321 char zBase[100]; /* Initial space */ 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 Op *aOp; /* Space to hold the virtual machine's program */ 349 Mem *aMem; /* The memory locations */ 350 Mem **apArg; /* Arguments to currently executing user function */ 351 Mem *aColName; /* Column names to return */ 352 Mem *pResultSet; /* Pointer to an array of results */ 353 Parse *pParse; /* Parsing context used to create this Vdbe */ 354 int nMem; /* Number of memory locations currently allocated */ 355 int nOp; /* Number of instructions in the program */ 356 int nCursor; /* Number of slots in apCsr[] */ 357 u32 magic; /* Magic number for sanity checking */ 358 char *zErrMsg; /* Error message written here */ 359 Vdbe *pPrev,*pNext; /* Linked list of VDBEs with the same Vdbe.db */ 360 VdbeCursor **apCsr; /* One element of this array for each open cursor */ 361 Mem *aVar; /* Values for the OP_Variable opcode. */ 362 char **azVar; /* Name of variables */ 363 ynVar nVar; /* Number of entries in aVar[] */ 364 ynVar nzVar; /* Number of entries in azVar[] */ 365 u32 cacheCtr; /* VdbeCursor row cache generation counter */ 366 int pc; /* The program counter */ 367 int rc; /* Value to return */ 368 #ifdef SQLITE_DEBUG 369 int rcApp; /* errcode set by sqlite3_result_error_code() */ 370 #endif 371 u16 nResColumn; /* Number of columns in one row of the result set */ 372 u8 errorAction; /* Recovery action to do in case of an error */ 373 u8 minWriteFileFormat; /* Minimum file format for writable database files */ 374 bft explain:2; /* True if EXPLAIN present on SQL command */ 375 bft changeCntOn:1; /* True to update the change-counter */ 376 bft expired:1; /* True if the VM needs to be recompiled */ 377 bft runOnlyOnce:1; /* Automatically expire on reset */ 378 bft usesStmtJournal:1; /* True if uses a statement journal */ 379 bft readOnly:1; /* True for statements that do not write */ 380 bft bIsReader:1; /* True for statements that read */ 381 bft isPrepareV2:1; /* True if prepared with prepare_v2() */ 382 bft doingRerun:1; /* True if rerunning after an auto-reprepare */ 383 int nChange; /* Number of db changes made since last reset */ 384 yDbMask btreeMask; /* Bitmask of db->aDb[] entries referenced */ 385 yDbMask lockMask; /* Subset of btreeMask that requires a lock */ 386 int iStatement; /* Statement number (or 0 if has not opened stmt) */ 387 u32 aCounter[5]; /* Counters used by sqlite3_stmt_status() */ 388 #ifndef SQLITE_OMIT_TRACE 389 i64 startTime; /* Time when query started - used for profiling */ 390 #endif 391 i64 iCurrentTime; /* Value of julianday('now') for this statement */ 392 i64 nFkConstraint; /* Number of imm. FK constraints this VM */ 393 i64 nStmtDefCons; /* Number of def. constraints when stmt started */ 394 i64 nStmtDefImmCons; /* Number of def. imm constraints when stmt started */ 395 char *zSql; /* Text of the SQL statement that generated this */ 396 void *pFree; /* Free this when deleting the vdbe */ 397 VdbeFrame *pFrame; /* Parent frame */ 398 VdbeFrame *pDelFrame; /* List of frame objects to free on VM reset */ 399 int nFrame; /* Number of frames in pFrame list */ 400 u32 expmask; /* Binding to these vars invalidates VM */ 401 SubProgram *pProgram; /* Linked list of all sub-programs used by VM */ 402 int nOnceFlag; /* Size of array aOnceFlag[] */ 403 u8 *aOnceFlag; /* Flags for OP_Once */ 404 AuxData *pAuxData; /* Linked list of auxdata allocations */ 405 #ifdef SQLITE_ENABLE_STMT_SCANSTATUS 406 i64 *anExec; /* Number of times each op has been executed */ 407 int nScan; /* Entries in aScan[] */ 408 ScanStatus *aScan; /* Scan definitions for sqlite3_stmt_scanstatus() */ 409 #endif 410 }; 411 412 /* 413 ** The following are allowed values for Vdbe.magic 414 */ 415 #define VDBE_MAGIC_INIT 0x26bceaa5 /* Building a VDBE program */ 416 #define VDBE_MAGIC_RUN 0xbdf20da3 /* VDBE is ready to execute */ 417 #define VDBE_MAGIC_HALT 0x519c2973 /* VDBE has completed execution */ 418 #define VDBE_MAGIC_DEAD 0xb606c3c8 /* The VDBE has been deallocated */ 419 420 /* 421 ** Function prototypes 422 */ 423 void sqlite3VdbeError(Vdbe*, const char *, ...); 424 void sqlite3VdbeFreeCursor(Vdbe *, VdbeCursor*); 425 void sqliteVdbePopStack(Vdbe*,int); 426 int sqlite3VdbeCursorMoveto(VdbeCursor*); 427 int sqlite3VdbeCursorRestore(VdbeCursor*); 428 #if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE) 429 void sqlite3VdbePrintOp(FILE*, int, Op*); 430 #endif 431 u32 sqlite3VdbeSerialTypeLen(u32); 432 u8 sqlite3VdbeOneByteSerialTypeLen(u8); 433 u32 sqlite3VdbeSerialType(Mem*, int, u32*); 434 u32 sqlite3VdbeSerialPut(unsigned char*, Mem*, u32); 435 u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*); 436 void sqlite3VdbeDeleteAuxData(Vdbe*, int, int); 437 438 int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *); 439 int sqlite3VdbeIdxKeyCompare(sqlite3*,VdbeCursor*,UnpackedRecord*,int*); 440 int sqlite3VdbeIdxRowid(sqlite3*, BtCursor*, i64*); 441 int sqlite3VdbeExec(Vdbe*); 442 int sqlite3VdbeList(Vdbe*); 443 int sqlite3VdbeHalt(Vdbe*); 444 int sqlite3VdbeChangeEncoding(Mem *, int); 445 int sqlite3VdbeMemTooBig(Mem*); 446 int sqlite3VdbeMemCopy(Mem*, const Mem*); 447 void sqlite3VdbeMemShallowCopy(Mem*, const Mem*, int); 448 void sqlite3VdbeMemMove(Mem*, Mem*); 449 int sqlite3VdbeMemNulTerminate(Mem*); 450 int sqlite3VdbeMemSetStr(Mem*, const char*, int, u8, void(*)(void*)); 451 void sqlite3VdbeMemSetInt64(Mem*, i64); 452 #ifdef SQLITE_OMIT_FLOATING_POINT 453 # define sqlite3VdbeMemSetDouble sqlite3VdbeMemSetInt64 454 #else 455 void sqlite3VdbeMemSetDouble(Mem*, double); 456 #endif 457 void sqlite3VdbeMemInit(Mem*,sqlite3*,u16); 458 void sqlite3VdbeMemSetNull(Mem*); 459 void sqlite3VdbeMemSetZeroBlob(Mem*,int); 460 void sqlite3VdbeMemSetRowSet(Mem*); 461 int sqlite3VdbeMemMakeWriteable(Mem*); 462 int sqlite3VdbeMemStringify(Mem*, u8, u8); 463 i64 sqlite3VdbeIntValue(Mem*); 464 int sqlite3VdbeMemIntegerify(Mem*); 465 double sqlite3VdbeRealValue(Mem*); 466 void sqlite3VdbeIntegerAffinity(Mem*); 467 int sqlite3VdbeMemRealify(Mem*); 468 int sqlite3VdbeMemNumerify(Mem*); 469 void sqlite3VdbeMemCast(Mem*,u8,u8); 470 int sqlite3VdbeMemFromBtree(BtCursor*,u32,u32,int,Mem*); 471 void sqlite3VdbeMemRelease(Mem *p); 472 #define VdbeMemDynamic(X) \ 473 (((X)->flags&(MEM_Agg|MEM_Dyn|MEM_RowSet|MEM_Frame))!=0) 474 int sqlite3VdbeMemFinalize(Mem*, FuncDef*); 475 const char *sqlite3OpcodeName(int); 476 int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve); 477 int sqlite3VdbeMemClearAndResize(Mem *pMem, int n); 478 int sqlite3VdbeCloseStatement(Vdbe *, int); 479 void sqlite3VdbeFrameDelete(VdbeFrame*); 480 int sqlite3VdbeFrameRestore(VdbeFrame *); 481 int sqlite3VdbeTransferError(Vdbe *p); 482 483 int sqlite3VdbeSorterInit(sqlite3 *, int, VdbeCursor *); 484 void sqlite3VdbeSorterReset(sqlite3 *, VdbeSorter *); 485 void sqlite3VdbeSorterClose(sqlite3 *, VdbeCursor *); 486 int sqlite3VdbeSorterRowkey(const VdbeCursor *, Mem *); 487 int sqlite3VdbeSorterNext(sqlite3 *, const VdbeCursor *, int *); 488 int sqlite3VdbeSorterRewind(const VdbeCursor *, int *); 489 int sqlite3VdbeSorterWrite(const VdbeCursor *, Mem *); 490 int sqlite3VdbeSorterCompare(const VdbeCursor *, Mem *, int, int *); 491 492 #if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE>0 493 void sqlite3VdbeEnter(Vdbe*); 494 void sqlite3VdbeLeave(Vdbe*); 495 #else 496 # define sqlite3VdbeEnter(X) 497 # define sqlite3VdbeLeave(X) 498 #endif 499 500 #ifdef SQLITE_DEBUG 501 void sqlite3VdbeMemAboutToChange(Vdbe*,Mem*); 502 int sqlite3VdbeCheckMemInvariants(Mem*); 503 #endif 504 505 #ifndef SQLITE_OMIT_FOREIGN_KEY 506 int sqlite3VdbeCheckFk(Vdbe *, int); 507 #else 508 # define sqlite3VdbeCheckFk(p,i) 0 509 #endif 510 511 int sqlite3VdbeMemTranslate(Mem*, u8); 512 #ifdef SQLITE_DEBUG 513 void sqlite3VdbePrintSql(Vdbe*); 514 void sqlite3VdbeMemPrettyPrint(Mem *pMem, char *zBuf); 515 #endif 516 int sqlite3VdbeMemHandleBom(Mem *pMem); 517 518 #ifndef SQLITE_OMIT_INCRBLOB 519 int sqlite3VdbeMemExpandBlob(Mem *); 520 #define ExpandBlob(P) (((P)->flags&MEM_Zero)?sqlite3VdbeMemExpandBlob(P):0) 521 #else 522 #define sqlite3VdbeMemExpandBlob(x) SQLITE_OK 523 #define ExpandBlob(P) SQLITE_OK 524 #endif 525 526 #endif /* !defined(_VDBEINT_H_) */ 527