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 SQLITE_VDBEINT_H 19 #define SQLITE_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 /* Elements of the linked list at Vdbe.pAuxData */ 56 typedef struct AuxData AuxData; 57 58 /* Types of VDBE cursors */ 59 #define CURTYPE_BTREE 0 60 #define CURTYPE_SORTER 1 61 #define CURTYPE_VTAB 2 62 #define CURTYPE_PSEUDO 3 63 64 /* 65 ** A VdbeCursor is an superclass (a wrapper) for various cursor objects: 66 ** 67 ** * A b-tree cursor 68 ** - In the main database or in an ephemeral database 69 ** - On either an index or a table 70 ** * A sorter 71 ** * A virtual table 72 ** * A one-row "pseudotable" stored in a single register 73 */ 74 typedef struct VdbeCursor VdbeCursor; 75 struct VdbeCursor { 76 u8 eCurType; /* One of the CURTYPE_* values above */ 77 i8 iDb; /* Index of cursor database in db->aDb[] (or -1) */ 78 u8 nullRow; /* True if pointing to a row with no data */ 79 u8 deferredMoveto; /* A call to sqlite3BtreeMoveto() is needed */ 80 u8 isTable; /* True for rowid tables. False for indexes */ 81 #ifdef SQLITE_DEBUG 82 u8 seekOp; /* Most recent seek operation on this cursor */ 83 u8 wrFlag; /* The wrFlag argument to sqlite3BtreeCursor() */ 84 #endif 85 Bool isEphemeral:1; /* True for an ephemeral table */ 86 Bool useRandomRowid:1; /* Generate new record numbers semi-randomly */ 87 Bool isOrdered:1; /* True if the table is not BTREE_UNORDERED */ 88 Bool seekHit:1; /* See the OP_SeekHit and OP_IfNoHope opcodes */ 89 Btree *pBtx; /* Separate file holding temporary table */ 90 i64 seqCount; /* Sequence counter */ 91 int *aAltMap; /* Mapping from table to index column numbers */ 92 93 /* Cached OP_Column parse information is only valid if cacheStatus matches 94 ** Vdbe.cacheCtr. Vdbe.cacheCtr will never take on the value of 95 ** CACHE_STALE (0) and so setting cacheStatus=CACHE_STALE guarantees that 96 ** the cache is out of date. */ 97 u32 cacheStatus; /* Cache is valid if this matches Vdbe.cacheCtr */ 98 int seekResult; /* Result of previous sqlite3BtreeMoveto() or 0 99 ** if there have been no prior seeks on the cursor. */ 100 /* seekResult does not distinguish between "no seeks have ever occurred 101 ** on this cursor" and "the most recent seek was an exact match". 102 ** For CURTYPE_PSEUDO, seekResult is the register holding the record */ 103 104 /* When a new VdbeCursor is allocated, only the fields above are zeroed. 105 ** The fields that follow are uninitialized, and must be individually 106 ** initialized prior to first use. */ 107 VdbeCursor *pAltCursor; /* Associated index cursor from which to read */ 108 union { 109 BtCursor *pCursor; /* CURTYPE_BTREE or _PSEUDO. Btree cursor */ 110 sqlite3_vtab_cursor *pVCur; /* CURTYPE_VTAB. Vtab cursor */ 111 VdbeSorter *pSorter; /* CURTYPE_SORTER. Sorter object */ 112 } uc; 113 KeyInfo *pKeyInfo; /* Info about index keys needed by index cursors */ 114 u32 iHdrOffset; /* Offset to next unparsed byte of the header */ 115 Pgno pgnoRoot; /* Root page of the open btree cursor */ 116 i16 nField; /* Number of fields in the header */ 117 u16 nHdrParsed; /* Number of header fields parsed so far */ 118 i64 movetoTarget; /* Argument to the deferred sqlite3BtreeMoveto() */ 119 u32 *aOffset; /* Pointer to aType[nField] */ 120 const u8 *aRow; /* Data for the current row, if all on one page */ 121 u32 payloadSize; /* Total number of bytes in the record */ 122 u32 szRow; /* Byte available in aRow */ 123 #ifdef SQLITE_ENABLE_COLUMN_USED_MASK 124 u64 maskUsed; /* Mask of columns used by this cursor */ 125 #endif 126 127 /* 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 u32 aType[1]; /* Type values record decode. MUST BE LAST */ 131 }; 132 133 134 /* 135 ** A value for VdbeCursor.cacheStatus that means the cache is always invalid. 136 */ 137 #define CACHE_STALE 0 138 139 /* 140 ** When a sub-program is executed (OP_Program), a structure of this type 141 ** is allocated to store the current value of the program counter, as 142 ** well as the current memory cell array and various other frame specific 143 ** values stored in the Vdbe struct. When the sub-program is finished, 144 ** these values are copied back to the Vdbe from the VdbeFrame structure, 145 ** restoring the state of the VM to as it was before the sub-program 146 ** began executing. 147 ** 148 ** The memory for a VdbeFrame object is allocated and managed by a memory 149 ** cell in the parent (calling) frame. When the memory cell is deleted or 150 ** overwritten, the VdbeFrame object is not freed immediately. Instead, it 151 ** is linked into the Vdbe.pDelFrame list. The contents of the Vdbe.pDelFrame 152 ** list is deleted when the VM is reset in VdbeHalt(). The reason for doing 153 ** this instead of deleting the VdbeFrame immediately is to avoid recursive 154 ** calls to sqlite3VdbeMemRelease() when the memory cells belonging to the 155 ** child frame are released. 156 ** 157 ** The currently executing frame is stored in Vdbe.pFrame. Vdbe.pFrame is 158 ** set to NULL if the currently executing frame is the main program. 159 */ 160 typedef struct VdbeFrame VdbeFrame; 161 struct VdbeFrame { 162 Vdbe *v; /* VM this frame belongs to */ 163 VdbeFrame *pParent; /* Parent of this frame, or NULL if parent is main */ 164 Op *aOp; /* Program instructions for parent frame */ 165 i64 *anExec; /* Event counters from parent frame */ 166 Mem *aMem; /* Array of memory cells for parent frame */ 167 VdbeCursor **apCsr; /* Array of Vdbe cursors for parent frame */ 168 u8 *aOnce; /* Bitmask used by OP_Once */ 169 void *token; /* Copy of SubProgram.token */ 170 i64 lastRowid; /* Last insert rowid (sqlite3.lastRowid) */ 171 AuxData *pAuxData; /* Linked list of auxdata allocations */ 172 #if SQLITE_DEBUG 173 u32 iFrameMagic; /* magic number for sanity checking */ 174 #endif 175 int nCursor; /* Number of entries in apCsr */ 176 int pc; /* Program Counter in parent (calling) frame */ 177 int nOp; /* Size of aOp array */ 178 int nMem; /* Number of entries in aMem */ 179 int nChildMem; /* Number of memory cells for child frame */ 180 int nChildCsr; /* Number of cursors for child frame */ 181 int nChange; /* Statement changes (Vdbe.nChange) */ 182 int nDbChange; /* Value of db->nChange */ 183 }; 184 185 /* Magic number for sanity checking on VdbeFrame objects */ 186 #define SQLITE_FRAME_MAGIC 0x879fb71e 187 188 /* 189 ** Return a pointer to the array of registers allocated for use 190 ** by a VdbeFrame. 191 */ 192 #define VdbeFrameMem(p) ((Mem *)&((u8 *)p)[ROUND8(sizeof(VdbeFrame))]) 193 194 /* 195 ** Internally, the vdbe manipulates nearly all SQL values as Mem 196 ** structures. Each Mem struct may cache multiple representations (string, 197 ** integer etc.) of the same value. 198 */ 199 struct sqlite3_value { 200 union MemValue { 201 double r; /* Real value used when MEM_Real is set in flags */ 202 i64 i; /* Integer value used when MEM_Int is set in flags */ 203 int nZero; /* Extra zero bytes when MEM_Zero and MEM_Blob set */ 204 const char *zPType; /* Pointer type when MEM_Term|MEM_Subtype|MEM_Null */ 205 FuncDef *pDef; /* Used only when flags==MEM_Agg */ 206 } u; 207 u16 flags; /* Some combination of MEM_Null, MEM_Str, MEM_Dyn, etc. */ 208 u8 enc; /* SQLITE_UTF8, SQLITE_UTF16BE, SQLITE_UTF16LE */ 209 u8 eSubtype; /* Subtype for this value */ 210 int n; /* Number of characters in string value, excluding '\0' */ 211 char *z; /* String or BLOB value */ 212 /* ShallowCopy only needs to copy the information above */ 213 char *zMalloc; /* Space to hold MEM_Str or MEM_Blob if szMalloc>0 */ 214 int szMalloc; /* Size of the zMalloc allocation */ 215 u32 uTemp; /* Transient storage for serial_type in OP_MakeRecord */ 216 sqlite3 *db; /* The associated database connection */ 217 void (*xDel)(void*);/* Destructor for Mem.z - only valid if MEM_Dyn */ 218 #ifdef SQLITE_DEBUG 219 Mem *pScopyFrom; /* This Mem is a shallow copy of pScopyFrom */ 220 u16 mScopyFlags; /* flags value immediately after the shallow copy */ 221 #endif 222 }; 223 224 /* 225 ** Size of struct Mem not including the Mem.zMalloc member or anything that 226 ** follows. 227 */ 228 #define MEMCELLSIZE offsetof(Mem,zMalloc) 229 230 /* One or more of the following flags are set to indicate the validOK 231 ** representations of the value stored in the Mem struct. 232 ** 233 ** If the MEM_Null flag is set, then the value is an SQL NULL value. 234 ** For a pointer type created using sqlite3_bind_pointer() or 235 ** sqlite3_result_pointer() the MEM_Term and MEM_Subtype flags are also set. 236 ** 237 ** If the MEM_Str flag is set then Mem.z points at a string representation. 238 ** Usually this is encoded in the same unicode encoding as the main 239 ** database (see below for exceptions). If the MEM_Term flag is also 240 ** set, then the string is nul terminated. The MEM_Int and MEM_Real 241 ** flags may coexist with the MEM_Str flag. 242 */ 243 #define MEM_Null 0x0001 /* Value is NULL (or a pointer) */ 244 #define MEM_Str 0x0002 /* Value is a string */ 245 #define MEM_Int 0x0004 /* Value is an integer */ 246 #define MEM_Real 0x0008 /* Value is a real number */ 247 #define MEM_Blob 0x0010 /* Value is a BLOB */ 248 #define MEM_IntReal 0x0020 /* MEM_Int that stringifies like MEM_Real */ 249 #define MEM_AffMask 0x003f /* Mask of affinity bits */ 250 #define MEM_FromBind 0x0040 /* Value originates from sqlite3_bind() */ 251 #define MEM_Undefined 0x0080 /* Value is undefined */ 252 #define MEM_Cleared 0x0100 /* NULL set by OP_Null, not from data */ 253 #define MEM_TypeMask 0xc1bf /* Mask of type bits */ 254 255 256 /* Whenever Mem contains a valid string or blob representation, one of 257 ** the following flags must be set to determine the memory management 258 ** policy for Mem.z. The MEM_Term flag tells us whether or not the 259 ** string is \000 or \u0000 terminated 260 */ 261 #define MEM_Term 0x0200 /* String in Mem.z is zero terminated */ 262 #define MEM_Dyn 0x0400 /* Need to call Mem.xDel() on Mem.z */ 263 #define MEM_Static 0x0800 /* Mem.z points to a static string */ 264 #define MEM_Ephem 0x1000 /* Mem.z points to an ephemeral string */ 265 #define MEM_Agg 0x2000 /* Mem.z points to an agg function context */ 266 #define MEM_Zero 0x4000 /* Mem.i contains count of 0s appended to blob */ 267 #define MEM_Subtype 0x8000 /* Mem.eSubtype is valid */ 268 #ifdef SQLITE_OMIT_INCRBLOB 269 #undef MEM_Zero 270 #define MEM_Zero 0x0000 271 #endif 272 273 /* Return TRUE if Mem X contains dynamically allocated content - anything 274 ** that needs to be deallocated to avoid a leak. 275 */ 276 #define VdbeMemDynamic(X) \ 277 (((X)->flags&(MEM_Agg|MEM_Dyn))!=0) 278 279 /* 280 ** Clear any existing type flags from a Mem and replace them with f 281 */ 282 #define MemSetTypeFlag(p, f) \ 283 ((p)->flags = ((p)->flags&~(MEM_TypeMask|MEM_Zero))|f) 284 285 /* 286 ** True if Mem X is a NULL-nochng type. 287 */ 288 #define MemNullNochng(X) \ 289 (((X)->flags&MEM_TypeMask)==(MEM_Null|MEM_Zero) \ 290 && (X)->n==0 && (X)->u.nZero==0) 291 292 /* 293 ** Return true if a memory cell is not marked as invalid. This macro 294 ** is for use inside assert() statements only. 295 */ 296 #ifdef SQLITE_DEBUG 297 #define memIsValid(M) ((M)->flags & MEM_Undefined)==0 298 #endif 299 300 /* 301 ** Each auxiliary data pointer stored by a user defined function 302 ** implementation calling sqlite3_set_auxdata() is stored in an instance 303 ** of this structure. All such structures associated with a single VM 304 ** are stored in a linked list headed at Vdbe.pAuxData. All are destroyed 305 ** when the VM is halted (if not before). 306 */ 307 struct AuxData { 308 int iAuxOp; /* Instruction number of OP_Function opcode */ 309 int iAuxArg; /* Index of function argument. */ 310 void *pAux; /* Aux data pointer */ 311 void (*xDeleteAux)(void*); /* Destructor for the aux data */ 312 AuxData *pNextAux; /* Next element in list */ 313 }; 314 315 /* 316 ** The "context" argument for an installable function. A pointer to an 317 ** instance of this structure is the first argument to the routines used 318 ** implement the SQL functions. 319 ** 320 ** There is a typedef for this structure in sqlite.h. So all routines, 321 ** even the public interface to SQLite, can use a pointer to this structure. 322 ** But this file is the only place where the internal details of this 323 ** structure are known. 324 ** 325 ** This structure is defined inside of vdbeInt.h because it uses substructures 326 ** (Mem) which are only defined there. 327 */ 328 struct sqlite3_context { 329 Mem *pOut; /* The return value is stored here */ 330 FuncDef *pFunc; /* Pointer to function information */ 331 Mem *pMem; /* Memory cell used to store aggregate context */ 332 Vdbe *pVdbe; /* The VM that owns this context */ 333 int iOp; /* Instruction number of OP_Function */ 334 int isError; /* Error code returned by the function. */ 335 u8 skipFlag; /* Skip accumulator loading if true */ 336 u8 argc; /* Number of arguments */ 337 sqlite3_value *argv[1]; /* Argument set */ 338 }; 339 340 /* A bitfield type for use inside of structures. Always follow with :N where 341 ** N is the number of bits. 342 */ 343 typedef unsigned bft; /* Bit Field Type */ 344 345 /* The ScanStatus object holds a single value for the 346 ** sqlite3_stmt_scanstatus() interface. 347 */ 348 typedef struct ScanStatus ScanStatus; 349 struct ScanStatus { 350 int addrExplain; /* OP_Explain for loop */ 351 int addrLoop; /* Address of "loops" counter */ 352 int addrVisit; /* Address of "rows visited" counter */ 353 int iSelectID; /* The "Select-ID" for this loop */ 354 LogEst nEst; /* Estimated output rows per loop */ 355 char *zName; /* Name of table or index */ 356 }; 357 358 /* The DblquoteStr object holds the text of a double-quoted 359 ** string for a prepared statement. A linked list of these objects 360 ** is constructed during statement parsing and is held on Vdbe.pDblStr. 361 ** When computing a normalized SQL statement for an SQL statement, that 362 ** list is consulted for each double-quoted identifier to see if the 363 ** identifier should really be a string literal. 364 */ 365 typedef struct DblquoteStr DblquoteStr; 366 struct DblquoteStr { 367 DblquoteStr *pNextStr; /* Next string literal in the list */ 368 char z[8]; /* Dequoted value for the string */ 369 }; 370 371 /* 372 ** An instance of the virtual machine. This structure contains the complete 373 ** state of the virtual machine. 374 ** 375 ** The "sqlite3_stmt" structure pointer that is returned by sqlite3_prepare() 376 ** is really a pointer to an instance of this structure. 377 */ 378 struct Vdbe { 379 sqlite3 *db; /* The database connection that owns this statement */ 380 Vdbe *pPrev,*pNext; /* Linked list of VDBEs with the same Vdbe.db */ 381 Parse *pParse; /* Parsing context used to create this Vdbe */ 382 ynVar nVar; /* Number of entries in aVar[] */ 383 u32 magic; /* Magic number for sanity checking */ 384 int nMem; /* Number of memory locations currently allocated */ 385 int nCursor; /* Number of slots in apCsr[] */ 386 u32 cacheCtr; /* VdbeCursor row cache generation counter */ 387 int pc; /* The program counter */ 388 int rc; /* Value to return */ 389 int nChange; /* Number of db changes made since last reset */ 390 int iStatement; /* Statement number (or 0 if has no opened stmt) */ 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 Mem *aMem; /* The memory locations */ 396 Mem **apArg; /* Arguments to currently executing user function */ 397 VdbeCursor **apCsr; /* One element of this array for each open cursor */ 398 Mem *aVar; /* Values for the OP_Variable opcode. */ 399 400 /* When allocating a new Vdbe object, all of the fields below should be 401 ** initialized to zero or NULL */ 402 403 Op *aOp; /* Space to hold the virtual machine's program */ 404 int nOp; /* Number of instructions in the program */ 405 int nOpAlloc; /* Slots allocated for aOp[] */ 406 Mem *aColName; /* Column names to return */ 407 Mem *pResultSet; /* Pointer to an array of results */ 408 char *zErrMsg; /* Error message written here */ 409 VList *pVList; /* Name of variables */ 410 #ifndef SQLITE_OMIT_TRACE 411 i64 startTime; /* Time when query started - used for profiling */ 412 #endif 413 #ifdef SQLITE_DEBUG 414 int rcApp; /* errcode set by sqlite3_result_error_code() */ 415 u32 nWrite; /* Number of write operations that have occurred */ 416 #endif 417 u16 nResColumn; /* Number of columns in one row of the result set */ 418 u8 errorAction; /* Recovery action to do in case of an error */ 419 u8 minWriteFileFormat; /* Minimum file format for writable database files */ 420 u8 prepFlags; /* SQLITE_PREPARE_* flags */ 421 bft expired:2; /* 1: recompile VM immediately 2: when convenient */ 422 bft explain:2; /* True if EXPLAIN present on SQL command */ 423 bft doingRerun:1; /* True if rerunning after an auto-reprepare */ 424 bft changeCntOn:1; /* True to update the change-counter */ 425 bft runOnlyOnce:1; /* Automatically expire on reset */ 426 bft usesStmtJournal:1; /* True if uses a statement journal */ 427 bft readOnly:1; /* True for statements that do not write */ 428 bft bIsReader:1; /* True for statements that read */ 429 yDbMask btreeMask; /* Bitmask of db->aDb[] entries referenced */ 430 yDbMask lockMask; /* Subset of btreeMask that requires a lock */ 431 u32 aCounter[7]; /* Counters used by sqlite3_stmt_status() */ 432 char *zSql; /* Text of the SQL statement that generated this */ 433 #ifdef SQLITE_ENABLE_NORMALIZE 434 char *zNormSql; /* Normalization of the associated SQL statement */ 435 DblquoteStr *pDblStr; /* List of double-quoted string literals */ 436 #endif 437 void *pFree; /* Free this when deleting the vdbe */ 438 VdbeFrame *pFrame; /* Parent frame */ 439 VdbeFrame *pDelFrame; /* List of frame objects to free on VM reset */ 440 int nFrame; /* Number of frames in pFrame list */ 441 u32 expmask; /* Binding to these vars invalidates VM */ 442 SubProgram *pProgram; /* Linked list of all sub-programs used by VM */ 443 AuxData *pAuxData; /* Linked list of auxdata allocations */ 444 #ifdef SQLITE_ENABLE_STMT_SCANSTATUS 445 i64 *anExec; /* Number of times each op has been executed */ 446 int nScan; /* Entries in aScan[] */ 447 ScanStatus *aScan; /* Scan definitions for sqlite3_stmt_scanstatus() */ 448 #endif 449 }; 450 451 /* 452 ** The following are allowed values for Vdbe.magic 453 */ 454 #define VDBE_MAGIC_INIT 0x16bceaa5 /* Building a VDBE program */ 455 #define VDBE_MAGIC_RUN 0x2df20da3 /* VDBE is ready to execute */ 456 #define VDBE_MAGIC_HALT 0x319c2973 /* VDBE has completed execution */ 457 #define VDBE_MAGIC_RESET 0x48fa9f76 /* Reset and ready to run again */ 458 #define VDBE_MAGIC_DEAD 0x5606c3c8 /* The VDBE has been deallocated */ 459 460 /* 461 ** Structure used to store the context required by the 462 ** sqlite3_preupdate_*() API functions. 463 */ 464 struct PreUpdate { 465 Vdbe *v; 466 VdbeCursor *pCsr; /* Cursor to read old values from */ 467 int op; /* One of SQLITE_INSERT, UPDATE, DELETE */ 468 u8 *aRecord; /* old.* database record */ 469 KeyInfo keyinfo; 470 UnpackedRecord *pUnpacked; /* Unpacked version of aRecord[] */ 471 UnpackedRecord *pNewUnpacked; /* Unpacked version of new.* record */ 472 int iNewReg; /* Register for new.* values */ 473 i64 iKey1; /* First key value passed to hook */ 474 i64 iKey2; /* Second key value passed to hook */ 475 Mem *aNew; /* Array of new.* values */ 476 Table *pTab; /* Schema object being upated */ 477 Index *pPk; /* PK index if pTab is WITHOUT ROWID */ 478 }; 479 480 /* 481 ** Function prototypes 482 */ 483 void sqlite3VdbeError(Vdbe*, const char *, ...); 484 void sqlite3VdbeFreeCursor(Vdbe *, VdbeCursor*); 485 void sqliteVdbePopStack(Vdbe*,int); 486 int SQLITE_NOINLINE sqlite3VdbeFinishMoveto(VdbeCursor*); 487 int sqlite3VdbeCursorMoveto(VdbeCursor**, int*); 488 int sqlite3VdbeCursorRestore(VdbeCursor*); 489 u32 sqlite3VdbeSerialTypeLen(u32); 490 u8 sqlite3VdbeOneByteSerialTypeLen(u8); 491 u32 sqlite3VdbeSerialPut(unsigned char*, Mem*, u32); 492 u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*); 493 void sqlite3VdbeDeleteAuxData(sqlite3*, AuxData**, int, int); 494 495 int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *); 496 int sqlite3VdbeIdxKeyCompare(sqlite3*,VdbeCursor*,UnpackedRecord*,int*); 497 int sqlite3VdbeIdxRowid(sqlite3*, BtCursor*, i64*); 498 int sqlite3VdbeExec(Vdbe*); 499 #ifndef SQLITE_OMIT_EXPLAIN 500 int sqlite3VdbeList(Vdbe*); 501 #endif 502 int sqlite3VdbeHalt(Vdbe*); 503 int sqlite3VdbeChangeEncoding(Mem *, int); 504 int sqlite3VdbeMemTooBig(Mem*); 505 int sqlite3VdbeMemCopy(Mem*, const Mem*); 506 void sqlite3VdbeMemShallowCopy(Mem*, const Mem*, int); 507 void sqlite3VdbeMemMove(Mem*, Mem*); 508 int sqlite3VdbeMemNulTerminate(Mem*); 509 int sqlite3VdbeMemSetStr(Mem*, const char*, int, u8, void(*)(void*)); 510 void sqlite3VdbeMemSetInt64(Mem*, i64); 511 #ifdef SQLITE_OMIT_FLOATING_POINT 512 # define sqlite3VdbeMemSetDouble sqlite3VdbeMemSetInt64 513 #else 514 void sqlite3VdbeMemSetDouble(Mem*, double); 515 #endif 516 void sqlite3VdbeMemSetPointer(Mem*, void*, const char*, void(*)(void*)); 517 void sqlite3VdbeMemInit(Mem*,sqlite3*,u16); 518 void sqlite3VdbeMemSetNull(Mem*); 519 void sqlite3VdbeMemSetZeroBlob(Mem*,int); 520 #ifdef SQLITE_DEBUG 521 int sqlite3VdbeMemIsRowSet(const Mem*); 522 #endif 523 int sqlite3VdbeMemSetRowSet(Mem*); 524 int sqlite3VdbeMemMakeWriteable(Mem*); 525 int sqlite3VdbeMemStringify(Mem*, u8, u8); 526 i64 sqlite3VdbeIntValue(Mem*); 527 int sqlite3VdbeMemIntegerify(Mem*); 528 double sqlite3VdbeRealValue(Mem*); 529 int sqlite3VdbeBooleanValue(Mem*, int ifNull); 530 void sqlite3VdbeIntegerAffinity(Mem*); 531 int sqlite3VdbeMemRealify(Mem*); 532 int sqlite3VdbeMemNumerify(Mem*); 533 int sqlite3VdbeMemCast(Mem*,u8,u8); 534 int sqlite3VdbeMemFromBtree(BtCursor*,u32,u32,Mem*); 535 void sqlite3VdbeMemRelease(Mem *p); 536 int sqlite3VdbeMemFinalize(Mem*, FuncDef*); 537 #ifndef SQLITE_OMIT_WINDOWFUNC 538 int sqlite3VdbeMemAggValue(Mem*, Mem*, FuncDef*); 539 #endif 540 #ifndef SQLITE_OMIT_EXPLAIN 541 const char *sqlite3OpcodeName(int); 542 #endif 543 int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve); 544 int sqlite3VdbeMemClearAndResize(Mem *pMem, int n); 545 int sqlite3VdbeCloseStatement(Vdbe *, int); 546 #ifdef SQLITE_DEBUG 547 int sqlite3VdbeFrameIsValid(VdbeFrame*); 548 #endif 549 void sqlite3VdbeFrameMemDel(void*); /* Destructor on Mem */ 550 void sqlite3VdbeFrameDelete(VdbeFrame*); /* Actually deletes the Frame */ 551 int sqlite3VdbeFrameRestore(VdbeFrame *); 552 #ifdef SQLITE_ENABLE_PREUPDATE_HOOK 553 void sqlite3VdbePreUpdateHook(Vdbe*,VdbeCursor*,int,const char*,Table*,i64,int); 554 #endif 555 int sqlite3VdbeTransferError(Vdbe *p); 556 557 int sqlite3VdbeSorterInit(sqlite3 *, int, VdbeCursor *); 558 void sqlite3VdbeSorterReset(sqlite3 *, VdbeSorter *); 559 void sqlite3VdbeSorterClose(sqlite3 *, VdbeCursor *); 560 int sqlite3VdbeSorterRowkey(const VdbeCursor *, Mem *); 561 int sqlite3VdbeSorterNext(sqlite3 *, const VdbeCursor *); 562 int sqlite3VdbeSorterRewind(const VdbeCursor *, int *); 563 int sqlite3VdbeSorterWrite(const VdbeCursor *, Mem *); 564 int sqlite3VdbeSorterCompare(const VdbeCursor *, Mem *, int, int *); 565 566 #ifdef SQLITE_DEBUG 567 void sqlite3VdbeIncrWriteCounter(Vdbe*, VdbeCursor*); 568 void sqlite3VdbeAssertAbortable(Vdbe*); 569 #else 570 # define sqlite3VdbeIncrWriteCounter(V,C) 571 # define sqlite3VdbeAssertAbortable(V) 572 #endif 573 574 #if !defined(SQLITE_OMIT_SHARED_CACHE) 575 void sqlite3VdbeEnter(Vdbe*); 576 #else 577 # define sqlite3VdbeEnter(X) 578 #endif 579 580 #if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE>0 581 void sqlite3VdbeLeave(Vdbe*); 582 #else 583 # define sqlite3VdbeLeave(X) 584 #endif 585 586 #ifdef SQLITE_DEBUG 587 void sqlite3VdbeMemAboutToChange(Vdbe*,Mem*); 588 int sqlite3VdbeCheckMemInvariants(Mem*); 589 #endif 590 591 #ifndef SQLITE_OMIT_FOREIGN_KEY 592 int sqlite3VdbeCheckFk(Vdbe *, int); 593 #else 594 # define sqlite3VdbeCheckFk(p,i) 0 595 #endif 596 597 #ifdef SQLITE_DEBUG 598 void sqlite3VdbePrintSql(Vdbe*); 599 void sqlite3VdbeMemPrettyPrint(Mem *pMem, StrAccum *pStr); 600 #endif 601 #ifndef SQLITE_OMIT_UTF16 602 int sqlite3VdbeMemTranslate(Mem*, u8); 603 int sqlite3VdbeMemHandleBom(Mem *pMem); 604 #endif 605 606 #ifndef SQLITE_OMIT_INCRBLOB 607 int sqlite3VdbeMemExpandBlob(Mem *); 608 #define ExpandBlob(P) (((P)->flags&MEM_Zero)?sqlite3VdbeMemExpandBlob(P):0) 609 #else 610 #define sqlite3VdbeMemExpandBlob(x) SQLITE_OK 611 #define ExpandBlob(P) SQLITE_OK 612 #endif 613 614 #endif /* !defined(SQLITE_VDBEINT_H) */ 615