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 typedef struct VdbeCursor VdbeCursor; 78 struct VdbeCursor { 79 u8 eCurType; /* One of the CURTYPE_* values above */ 80 i8 iDb; /* Index of cursor database in db->aDb[] (or -1) */ 81 u8 nullRow; /* True if pointing to a row with no data */ 82 u8 deferredMoveto; /* A call to sqlite3BtreeMoveto() is needed */ 83 u8 isTable; /* True for rowid tables. False for indexes */ 84 #ifdef SQLITE_DEBUG 85 u8 seekOp; /* Most recent seek operation on this cursor */ 86 u8 wrFlag; /* The wrFlag argument to sqlite3BtreeCursor() */ 87 #endif 88 Bool isEphemeral:1; /* True for an ephemeral table */ 89 Bool useRandomRowid:1;/* Generate new record numbers semi-randomly */ 90 Bool isOrdered:1; /* True if the underlying table is BTREE_UNORDERED */ 91 Pgno pgnoRoot; /* Root page of the open btree cursor */ 92 i16 nField; /* Number of fields in the header */ 93 u16 nHdrParsed; /* Number of header fields parsed so far */ 94 union { 95 BtCursor *pCursor; /* CURTYPE_BTREE. Btree cursor */ 96 sqlite3_vtab_cursor *pVCur; /* CURTYPE_VTAB. Vtab cursor */ 97 int pseudoTableReg; /* CURTYPE_PSEUDO. Reg holding content. */ 98 VdbeSorter *pSorter; /* CURTYPE_SORTER. Sorter object */ 99 } uc; 100 Btree *pBt; /* Separate file holding temporary table */ 101 KeyInfo *pKeyInfo; /* Info about index keys needed by index cursors */ 102 int seekResult; /* Result of previous sqlite3BtreeMoveto() */ 103 i64 seqCount; /* Sequence counter */ 104 i64 movetoTarget; /* Argument to the deferred sqlite3BtreeMoveto() */ 105 VdbeCursor *pAltCursor; /* Associated index cursor from which to read */ 106 int *aAltMap; /* Mapping from table to index column numbers */ 107 #ifdef SQLITE_ENABLE_COLUMN_USED_MASK 108 u64 maskUsed; /* Mask of columns used by this cursor */ 109 #endif 110 111 /* Cached information about the header for the data record that the 112 ** cursor is currently pointing to. Only valid if cacheStatus matches 113 ** Vdbe.cacheCtr. Vdbe.cacheCtr will never take on the value of 114 ** CACHE_STALE and so setting cacheStatus=CACHE_STALE guarantees that 115 ** the cache is out of date. 116 ** 117 ** aRow might point to (ephemeral) data for the current row, or it might 118 ** be NULL. 119 */ 120 u32 cacheStatus; /* Cache is valid if this matches Vdbe.cacheCtr */ 121 u32 payloadSize; /* Total number of bytes in the record */ 122 u32 szRow; /* Byte available in aRow */ 123 u32 iHdrOffset; /* Offset to next unparsed byte of the header */ 124 const u8 *aRow; /* Data for the current row, if all on one page */ 125 u32 *aOffset; /* Pointer to aType[nField] */ 126 u32 aType[1]; /* Type values for all entries in the record */ 127 /* 2*nField extra array elements allocated for aType[], beyond the one 128 ** static element declared in the structure. nField total array slots for 129 ** aType[] and nField+1 array slots for aOffset[] */ 130 }; 131 132 /* 133 ** When a sub-program is executed (OP_Program), a structure of this type 134 ** is allocated to store the current value of the program counter, as 135 ** well as the current memory cell array and various other frame specific 136 ** values stored in the Vdbe struct. When the sub-program is finished, 137 ** these values are copied back to the Vdbe from the VdbeFrame structure, 138 ** restoring the state of the VM to as it was before the sub-program 139 ** began executing. 140 ** 141 ** The memory for a VdbeFrame object is allocated and managed by a memory 142 ** cell in the parent (calling) frame. When the memory cell is deleted or 143 ** overwritten, the VdbeFrame object is not freed immediately. Instead, it 144 ** is linked into the Vdbe.pDelFrame list. The contents of the Vdbe.pDelFrame 145 ** list is deleted when the VM is reset in VdbeHalt(). The reason for doing 146 ** this instead of deleting the VdbeFrame immediately is to avoid recursive 147 ** calls to sqlite3VdbeMemRelease() when the memory cells belonging to the 148 ** child frame are released. 149 ** 150 ** The currently executing frame is stored in Vdbe.pFrame. Vdbe.pFrame is 151 ** set to NULL if the currently executing frame is the main program. 152 */ 153 typedef struct VdbeFrame VdbeFrame; 154 struct VdbeFrame { 155 Vdbe *v; /* VM this frame belongs to */ 156 VdbeFrame *pParent; /* Parent of this frame, or NULL if parent is main */ 157 Op *aOp; /* Program instructions for parent frame */ 158 i64 *anExec; /* Event counters from parent frame */ 159 Mem *aMem; /* Array of memory cells for parent frame */ 160 u8 *aOnceFlag; /* Array of OP_Once flags for parent frame */ 161 VdbeCursor **apCsr; /* Array of Vdbe cursors for parent frame */ 162 void *token; /* Copy of SubProgram.token */ 163 i64 lastRowid; /* Last insert rowid (sqlite3.lastRowid) */ 164 int nCursor; /* Number of entries in apCsr */ 165 int pc; /* Program Counter in parent (calling) frame */ 166 int nOp; /* Size of aOp array */ 167 int nMem; /* Number of entries in aMem */ 168 int nOnceFlag; /* Number of entries in aOnceFlag */ 169 int nChildMem; /* Number of memory cells for child frame */ 170 int nChildCsr; /* Number of cursors for child frame */ 171 int nChange; /* Statement changes (Vdbe.nChange) */ 172 int nDbChange; /* Value of db->nChange */ 173 }; 174 175 #define VdbeFrameMem(p) ((Mem *)&((u8 *)p)[ROUND8(sizeof(VdbeFrame))]) 176 177 /* 178 ** A value for VdbeCursor.cacheValid that means the cache is always invalid. 179 */ 180 #define CACHE_STALE 0 181 182 /* 183 ** Internally, the vdbe manipulates nearly all SQL values as Mem 184 ** structures. Each Mem struct may cache multiple representations (string, 185 ** integer etc.) of the same value. 186 */ 187 struct Mem { 188 union MemValue { 189 double r; /* Real value used when MEM_Real is set in flags */ 190 i64 i; /* Integer value used when MEM_Int is set in flags */ 191 int nZero; /* Used when bit MEM_Zero is set in flags */ 192 FuncDef *pDef; /* Used only when flags==MEM_Agg */ 193 RowSet *pRowSet; /* Used only when flags==MEM_RowSet */ 194 VdbeFrame *pFrame; /* Used when flags==MEM_Frame */ 195 } u; 196 u16 flags; /* Some combination of MEM_Null, MEM_Str, MEM_Dyn, etc. */ 197 u8 enc; /* SQLITE_UTF8, SQLITE_UTF16BE, SQLITE_UTF16LE */ 198 u8 eSubtype; /* Subtype for this value */ 199 int n; /* Number of characters in string value, excluding '\0' */ 200 char *z; /* String or BLOB value */ 201 /* ShallowCopy only needs to copy the information above */ 202 char *zMalloc; /* Space to hold MEM_Str or MEM_Blob if szMalloc>0 */ 203 int szMalloc; /* Size of the zMalloc allocation */ 204 u32 uTemp; /* Transient storage for serial_type in OP_MakeRecord */ 205 sqlite3 *db; /* The associated database connection */ 206 void (*xDel)(void*);/* Destructor for Mem.z - only valid if MEM_Dyn */ 207 #ifdef SQLITE_DEBUG 208 Mem *pScopyFrom; /* This Mem is a shallow copy of pScopyFrom */ 209 void *pFiller; /* So that sizeof(Mem) is a multiple of 8 */ 210 #endif 211 }; 212 213 /* 214 ** Size of struct Mem not including the Mem.zMalloc member or anything that 215 ** follows. 216 */ 217 #define MEMCELLSIZE offsetof(Mem,zMalloc) 218 219 /* One or more of the following flags are set to indicate the validOK 220 ** representations of the value stored in the Mem struct. 221 ** 222 ** If the MEM_Null flag is set, then the value is an SQL NULL value. 223 ** No other flags may be set in this case. 224 ** 225 ** If the MEM_Str flag is set then Mem.z points at a string representation. 226 ** Usually this is encoded in the same unicode encoding as the main 227 ** database (see below for exceptions). If the MEM_Term flag is also 228 ** set, then the string is nul terminated. The MEM_Int and MEM_Real 229 ** flags may coexist with the MEM_Str flag. 230 */ 231 #define MEM_Null 0x0001 /* Value is NULL */ 232 #define MEM_Str 0x0002 /* Value is a string */ 233 #define MEM_Int 0x0004 /* Value is an integer */ 234 #define MEM_Real 0x0008 /* Value is a real number */ 235 #define MEM_Blob 0x0010 /* Value is a BLOB */ 236 #define MEM_AffMask 0x001f /* Mask of affinity bits */ 237 #define MEM_RowSet 0x0020 /* Value is a RowSet object */ 238 #define MEM_Frame 0x0040 /* Value is a VdbeFrame object */ 239 #define MEM_Undefined 0x0080 /* Value is undefined */ 240 #define MEM_Cleared 0x0100 /* NULL set by OP_Null, not from data */ 241 #define MEM_TypeMask 0x81ff /* Mask of type bits */ 242 243 244 /* Whenever Mem contains a valid string or blob representation, one of 245 ** the following flags must be set to determine the memory management 246 ** policy for Mem.z. The MEM_Term flag tells us whether or not the 247 ** string is \000 or \u0000 terminated 248 */ 249 #define MEM_Term 0x0200 /* String rep is nul terminated */ 250 #define MEM_Dyn 0x0400 /* Need to call Mem.xDel() on Mem.z */ 251 #define MEM_Static 0x0800 /* Mem.z points to a static string */ 252 #define MEM_Ephem 0x1000 /* Mem.z points to an ephemeral string */ 253 #define MEM_Agg 0x2000 /* Mem.z points to an agg function context */ 254 #define MEM_Zero 0x4000 /* Mem.i contains count of 0s appended to blob */ 255 #define MEM_Subtype 0x8000 /* Mem.eSubtype is valid */ 256 #ifdef SQLITE_OMIT_INCRBLOB 257 #undef MEM_Zero 258 #define MEM_Zero 0x0000 259 #endif 260 261 /* Return TRUE if Mem X contains dynamically allocated content - anything 262 ** that needs to be deallocated to avoid a leak. 263 */ 264 #define VdbeMemDynamic(X) \ 265 (((X)->flags&(MEM_Agg|MEM_Dyn|MEM_RowSet|MEM_Frame))!=0) 266 267 /* 268 ** Clear any existing type flags from a Mem and replace them with f 269 */ 270 #define MemSetTypeFlag(p, f) \ 271 ((p)->flags = ((p)->flags&~(MEM_TypeMask|MEM_Zero))|f) 272 273 /* 274 ** Return true if a memory cell is not marked as invalid. This macro 275 ** is for use inside assert() statements only. 276 */ 277 #ifdef SQLITE_DEBUG 278 #define memIsValid(M) ((M)->flags & MEM_Undefined)==0 279 #endif 280 281 /* 282 ** Each auxiliary data pointer stored by a user defined function 283 ** implementation calling sqlite3_set_auxdata() is stored in an instance 284 ** of this structure. All such structures associated with a single VM 285 ** are stored in a linked list headed at Vdbe.pAuxData. All are destroyed 286 ** when the VM is halted (if not before). 287 */ 288 struct AuxData { 289 int iOp; /* Instruction number of OP_Function opcode */ 290 int iArg; /* Index of function argument. */ 291 void *pAux; /* Aux data pointer */ 292 void (*xDelete)(void *); /* Destructor for the aux data */ 293 AuxData *pNext; /* Next element in list */ 294 }; 295 296 /* 297 ** The "context" argument for an installable function. A pointer to an 298 ** instance of this structure is the first argument to the routines used 299 ** implement the SQL functions. 300 ** 301 ** There is a typedef for this structure in sqlite.h. So all routines, 302 ** even the public interface to SQLite, can use a pointer to this structure. 303 ** But this file is the only place where the internal details of this 304 ** structure are known. 305 ** 306 ** This structure is defined inside of vdbeInt.h because it uses substructures 307 ** (Mem) which are only defined there. 308 */ 309 struct sqlite3_context { 310 Mem *pOut; /* The return value is stored here */ 311 FuncDef *pFunc; /* Pointer to function information */ 312 Mem *pMem; /* Memory cell used to store aggregate context */ 313 Vdbe *pVdbe; /* The VM that owns this context */ 314 int iOp; /* Instruction number of OP_Function */ 315 int isError; /* Error code returned by the function. */ 316 u8 skipFlag; /* Skip accumulator loading if true */ 317 u8 fErrorOrAux; /* isError!=0 or pVdbe->pAuxData modified */ 318 u8 argc; /* Number of arguments */ 319 sqlite3_value *argv[1]; /* Argument set */ 320 }; 321 322 /* 323 ** An Explain object accumulates indented output which is helpful 324 ** in describing recursive data structures. 325 */ 326 struct Explain { 327 Vdbe *pVdbe; /* Attach the explanation to this Vdbe */ 328 StrAccum str; /* The string being accumulated */ 329 int nIndent; /* Number of elements in aIndent */ 330 u16 aIndent[100]; /* Levels of indentation */ 331 char zBase[100]; /* Initial space */ 332 }; 333 334 /* A bitfield type for use inside of structures. Always follow with :N where 335 ** N is the number of bits. 336 */ 337 typedef unsigned bft; /* Bit Field Type */ 338 339 typedef struct ScanStatus ScanStatus; 340 struct ScanStatus { 341 int addrExplain; /* OP_Explain for loop */ 342 int addrLoop; /* Address of "loops" counter */ 343 int addrVisit; /* Address of "rows visited" counter */ 344 int iSelectID; /* The "Select-ID" for this loop */ 345 LogEst nEst; /* Estimated output rows per loop */ 346 char *zName; /* Name of table or index */ 347 }; 348 349 /* 350 ** An instance of the virtual machine. This structure contains the complete 351 ** state of the virtual machine. 352 ** 353 ** The "sqlite3_stmt" structure pointer that is returned by sqlite3_prepare() 354 ** is really a pointer to an instance of this structure. 355 */ 356 struct Vdbe { 357 sqlite3 *db; /* The database connection that owns this statement */ 358 Op *aOp; /* Space to hold the virtual machine's program */ 359 Mem *aMem; /* The memory locations */ 360 Mem **apArg; /* Arguments to currently executing user function */ 361 Mem *aColName; /* Column names to return */ 362 Mem *pResultSet; /* Pointer to an array of results */ 363 Parse *pParse; /* Parsing context used to create this Vdbe */ 364 int nMem; /* Number of memory locations currently allocated */ 365 int nOp; /* Number of instructions in the program */ 366 int nCursor; /* Number of slots in apCsr[] */ 367 u32 magic; /* Magic number for sanity checking */ 368 char *zErrMsg; /* Error message written here */ 369 Vdbe *pPrev,*pNext; /* Linked list of VDBEs with the same Vdbe.db */ 370 VdbeCursor **apCsr; /* One element of this array for each open cursor */ 371 Mem *aVar; /* Values for the OP_Variable opcode. */ 372 char **azVar; /* Name of variables */ 373 ynVar nVar; /* Number of entries in aVar[] */ 374 ynVar nzVar; /* Number of entries in azVar[] */ 375 u32 cacheCtr; /* VdbeCursor row cache generation counter */ 376 int pc; /* The program counter */ 377 int rc; /* Value to return */ 378 #ifdef SQLITE_DEBUG 379 int rcApp; /* errcode set by sqlite3_result_error_code() */ 380 #endif 381 u16 nResColumn; /* Number of columns in one row of the result set */ 382 u8 errorAction; /* Recovery action to do in case of an error */ 383 u8 minWriteFileFormat; /* Minimum file format for writable database files */ 384 bft explain:2; /* True if EXPLAIN present on SQL command */ 385 bft changeCntOn:1; /* True to update the change-counter */ 386 bft expired:1; /* True if the VM needs to be recompiled */ 387 bft runOnlyOnce:1; /* Automatically expire on reset */ 388 bft usesStmtJournal:1; /* True if uses a statement journal */ 389 bft readOnly:1; /* True for statements that do not write */ 390 bft bIsReader:1; /* True for statements that read */ 391 bft isPrepareV2:1; /* True if prepared with prepare_v2() */ 392 bft doingRerun:1; /* True if rerunning after an auto-reprepare */ 393 int nChange; /* Number of db changes made since last reset */ 394 yDbMask btreeMask; /* Bitmask of db->aDb[] entries referenced */ 395 yDbMask lockMask; /* Subset of btreeMask that requires a lock */ 396 int iStatement; /* Statement number (or 0 if has not opened stmt) */ 397 u32 aCounter[5]; /* Counters used by sqlite3_stmt_status() */ 398 #ifndef SQLITE_OMIT_TRACE 399 i64 startTime; /* Time when query started - used for profiling */ 400 #endif 401 i64 iCurrentTime; /* Value of julianday('now') for this statement */ 402 i64 nFkConstraint; /* Number of imm. FK constraints this VM */ 403 i64 nStmtDefCons; /* Number of def. constraints when stmt started */ 404 i64 nStmtDefImmCons; /* Number of def. imm constraints when stmt started */ 405 char *zSql; /* Text of the SQL statement that generated this */ 406 void *pFree; /* Free this when deleting the vdbe */ 407 VdbeFrame *pFrame; /* Parent frame */ 408 VdbeFrame *pDelFrame; /* List of frame objects to free on VM reset */ 409 int nFrame; /* Number of frames in pFrame list */ 410 u32 expmask; /* Binding to these vars invalidates VM */ 411 SubProgram *pProgram; /* Linked list of all sub-programs used by VM */ 412 int nOnceFlag; /* Size of array aOnceFlag[] */ 413 u8 *aOnceFlag; /* Flags for OP_Once */ 414 AuxData *pAuxData; /* Linked list of auxdata allocations */ 415 #ifdef SQLITE_ENABLE_STMT_SCANSTATUS 416 i64 *anExec; /* Number of times each op has been executed */ 417 int nScan; /* Entries in aScan[] */ 418 ScanStatus *aScan; /* Scan definitions for sqlite3_stmt_scanstatus() */ 419 #endif 420 }; 421 422 /* 423 ** The following are allowed values for Vdbe.magic 424 */ 425 #define VDBE_MAGIC_INIT 0x26bceaa5 /* Building a VDBE program */ 426 #define VDBE_MAGIC_RUN 0xbdf20da3 /* VDBE is ready to execute */ 427 #define VDBE_MAGIC_HALT 0x519c2973 /* VDBE has completed execution */ 428 #define VDBE_MAGIC_DEAD 0xb606c3c8 /* The VDBE has been deallocated */ 429 430 /* 431 ** Function prototypes 432 */ 433 void sqlite3VdbeError(Vdbe*, const char *, ...); 434 void sqlite3VdbeFreeCursor(Vdbe *, VdbeCursor*); 435 void sqliteVdbePopStack(Vdbe*,int); 436 int sqlite3VdbeCursorMoveto(VdbeCursor**, int*); 437 int sqlite3VdbeCursorRestore(VdbeCursor*); 438 #if defined(SQLITE_DEBUG) || defined(VDBE_PROFILE) 439 void sqlite3VdbePrintOp(FILE*, int, Op*); 440 #endif 441 u32 sqlite3VdbeSerialTypeLen(u32); 442 u8 sqlite3VdbeOneByteSerialTypeLen(u8); 443 u32 sqlite3VdbeSerialType(Mem*, int, u32*); 444 u32 sqlite3VdbeSerialPut(unsigned char*, Mem*, u32); 445 u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*); 446 void sqlite3VdbeDeleteAuxData(Vdbe*, int, int); 447 448 int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *); 449 int sqlite3VdbeIdxKeyCompare(sqlite3*,VdbeCursor*,UnpackedRecord*,int*); 450 int sqlite3VdbeIdxRowid(sqlite3*, BtCursor*, i64*); 451 int sqlite3VdbeExec(Vdbe*); 452 int sqlite3VdbeList(Vdbe*); 453 int sqlite3VdbeHalt(Vdbe*); 454 int sqlite3VdbeChangeEncoding(Mem *, int); 455 int sqlite3VdbeMemTooBig(Mem*); 456 int sqlite3VdbeMemCopy(Mem*, const Mem*); 457 void sqlite3VdbeMemShallowCopy(Mem*, const Mem*, int); 458 void sqlite3VdbeMemMove(Mem*, Mem*); 459 int sqlite3VdbeMemNulTerminate(Mem*); 460 int sqlite3VdbeMemSetStr(Mem*, const char*, int, u8, void(*)(void*)); 461 void sqlite3VdbeMemSetInt64(Mem*, i64); 462 #ifdef SQLITE_OMIT_FLOATING_POINT 463 # define sqlite3VdbeMemSetDouble sqlite3VdbeMemSetInt64 464 #else 465 void sqlite3VdbeMemSetDouble(Mem*, double); 466 #endif 467 void sqlite3VdbeMemInit(Mem*,sqlite3*,u16); 468 void sqlite3VdbeMemSetNull(Mem*); 469 void sqlite3VdbeMemSetZeroBlob(Mem*,int); 470 void sqlite3VdbeMemSetRowSet(Mem*); 471 int sqlite3VdbeMemMakeWriteable(Mem*); 472 int sqlite3VdbeMemStringify(Mem*, u8, u8); 473 i64 sqlite3VdbeIntValue(Mem*); 474 int sqlite3VdbeMemIntegerify(Mem*); 475 double sqlite3VdbeRealValue(Mem*); 476 void sqlite3VdbeIntegerAffinity(Mem*); 477 int sqlite3VdbeMemRealify(Mem*); 478 int sqlite3VdbeMemNumerify(Mem*); 479 void sqlite3VdbeMemCast(Mem*,u8,u8); 480 int sqlite3VdbeMemFromBtree(BtCursor*,u32,u32,int,Mem*); 481 void sqlite3VdbeMemRelease(Mem *p); 482 int sqlite3VdbeMemFinalize(Mem*, FuncDef*); 483 const char *sqlite3OpcodeName(int); 484 int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve); 485 int sqlite3VdbeMemClearAndResize(Mem *pMem, int n); 486 int sqlite3VdbeCloseStatement(Vdbe *, int); 487 void sqlite3VdbeFrameDelete(VdbeFrame*); 488 int sqlite3VdbeFrameRestore(VdbeFrame *); 489 int sqlite3VdbeTransferError(Vdbe *p); 490 491 int sqlite3VdbeSorterInit(sqlite3 *, int, VdbeCursor *); 492 void sqlite3VdbeSorterReset(sqlite3 *, VdbeSorter *); 493 void sqlite3VdbeSorterClose(sqlite3 *, VdbeCursor *); 494 int sqlite3VdbeSorterRowkey(const VdbeCursor *, Mem *); 495 int sqlite3VdbeSorterNext(sqlite3 *, const VdbeCursor *, int *); 496 int sqlite3VdbeSorterRewind(const VdbeCursor *, int *); 497 int sqlite3VdbeSorterWrite(const VdbeCursor *, Mem *); 498 int sqlite3VdbeSorterCompare(const VdbeCursor *, Mem *, int, int *); 499 500 #if !defined(SQLITE_OMIT_SHARED_CACHE) 501 void sqlite3VdbeEnter(Vdbe*); 502 #else 503 # define sqlite3VdbeEnter(X) 504 #endif 505 506 #if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE>0 507 void sqlite3VdbeLeave(Vdbe*); 508 #else 509 # define sqlite3VdbeLeave(X) 510 #endif 511 512 #ifdef SQLITE_DEBUG 513 void sqlite3VdbeMemAboutToChange(Vdbe*,Mem*); 514 int sqlite3VdbeCheckMemInvariants(Mem*); 515 #endif 516 517 #ifndef SQLITE_OMIT_FOREIGN_KEY 518 int sqlite3VdbeCheckFk(Vdbe *, int); 519 #else 520 # define sqlite3VdbeCheckFk(p,i) 0 521 #endif 522 523 int sqlite3VdbeMemTranslate(Mem*, u8); 524 #ifdef SQLITE_DEBUG 525 void sqlite3VdbePrintSql(Vdbe*); 526 void sqlite3VdbeMemPrettyPrint(Mem *pMem, char *zBuf); 527 #endif 528 int sqlite3VdbeMemHandleBom(Mem *pMem); 529 530 #ifndef SQLITE_OMIT_INCRBLOB 531 int sqlite3VdbeMemExpandBlob(Mem *); 532 #define ExpandBlob(P) (((P)->flags&MEM_Zero)?sqlite3VdbeMemExpandBlob(P):0) 533 #else 534 #define sqlite3VdbeMemExpandBlob(x) SQLITE_OK 535 #define ExpandBlob(P) SQLITE_OK 536 #endif 537 538 #endif /* !defined(_VDBEINT_H_) */ 539