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 || defined(SQLITE_ENABLE_BYTECODE_VTAB) 36 # define VDBE_DISPLAY_P4 1 37 #else 38 # define VDBE_DISPLAY_P4 0 39 #endif 40 41 /* 42 ** SQL is translated into a sequence of instructions to be 43 ** executed by a virtual machine. Each instruction is an instance 44 ** of the following structure. 45 */ 46 typedef struct VdbeOp Op; 47 48 /* 49 ** Boolean values 50 */ 51 typedef unsigned Bool; 52 53 /* Opaque type used by code in vdbesort.c */ 54 typedef struct VdbeSorter VdbeSorter; 55 56 /* Elements of the linked list at Vdbe.pAuxData */ 57 typedef struct AuxData AuxData; 58 59 /* Types of VDBE cursors */ 60 #define CURTYPE_BTREE 0 61 #define CURTYPE_SORTER 1 62 #define CURTYPE_VTAB 2 63 #define CURTYPE_PSEUDO 3 64 65 /* 66 ** A VdbeCursor is an superclass (a wrapper) for various cursor objects: 67 ** 68 ** * A b-tree cursor 69 ** - In the main database or in an ephemeral database 70 ** - On either an index or a table 71 ** * A sorter 72 ** * A virtual table 73 ** * A one-row "pseudotable" stored in a single register 74 */ 75 typedef struct VdbeCursor VdbeCursor; 76 struct VdbeCursor { 77 u8 eCurType; /* One of the CURTYPE_* values above */ 78 i8 iDb; /* Index of cursor database in db->aDb[] (or -1) */ 79 u8 nullRow; /* True if pointing to a row with no data */ 80 u8 deferredMoveto; /* A call to sqlite3BtreeMoveto() is needed */ 81 u8 isTable; /* True for rowid tables. False for indexes */ 82 #ifdef SQLITE_DEBUG 83 u8 seekOp; /* Most recent seek operation on this cursor */ 84 u8 wrFlag; /* The wrFlag argument to sqlite3BtreeCursor() */ 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 table is not BTREE_UNORDERED */ 89 Bool hasBeenDuped:1; /* This cursor was source or target of OP_OpenDup */ 90 u16 seekHit; /* See the OP_SeekHit and OP_IfNoHope opcodes */ 91 Btree *pBtx; /* Separate file holding temporary table */ 92 i64 seqCount; /* Sequence counter */ 93 u32 *aAltMap; /* Mapping from table to index column numbers */ 94 95 /* Cached OP_Column parse information is only valid if cacheStatus matches 96 ** Vdbe.cacheCtr. Vdbe.cacheCtr will never take on the value of 97 ** CACHE_STALE (0) and so setting cacheStatus=CACHE_STALE guarantees that 98 ** the cache is out of date. */ 99 u32 cacheStatus; /* Cache is valid if this matches Vdbe.cacheCtr */ 100 int seekResult; /* Result of previous sqlite3BtreeMoveto() or 0 101 ** if there have been no prior seeks on the cursor. */ 102 /* seekResult does not distinguish between "no seeks have ever occurred 103 ** on this cursor" and "the most recent seek was an exact match". 104 ** For CURTYPE_PSEUDO, seekResult is the register holding the record */ 105 106 /* When a new VdbeCursor is allocated, only the fields above are zeroed. 107 ** The fields that follow are uninitialized, and must be individually 108 ** initialized prior to first use. */ 109 VdbeCursor *pAltCursor; /* Associated index cursor from which to read */ 110 union { 111 BtCursor *pCursor; /* CURTYPE_BTREE or _PSEUDO. Btree cursor */ 112 sqlite3_vtab_cursor *pVCur; /* CURTYPE_VTAB. Vtab cursor */ 113 VdbeSorter *pSorter; /* CURTYPE_SORTER. Sorter object */ 114 } uc; 115 KeyInfo *pKeyInfo; /* Info about index keys needed by index cursors */ 116 u32 iHdrOffset; /* Offset to next unparsed byte of the header */ 117 Pgno pgnoRoot; /* Root page of the open btree cursor */ 118 i16 nField; /* Number of fields in the header */ 119 u16 nHdrParsed; /* Number of header fields parsed so far */ 120 i64 movetoTarget; /* Argument to the deferred sqlite3BtreeMoveto() */ 121 u32 *aOffset; /* Pointer to aType[nField] */ 122 const u8 *aRow; /* Data for the current row, if all on one page */ 123 u32 payloadSize; /* Total number of bytes in the record */ 124 u32 szRow; /* Byte available in aRow */ 125 #ifdef SQLITE_ENABLE_COLUMN_USED_MASK 126 u64 maskUsed; /* Mask of columns used by this cursor */ 127 #endif 128 129 /* 2*nField extra array elements allocated for aType[], beyond the one 130 ** static element declared in the structure. nField total array slots for 131 ** aType[] and nField+1 array slots for aOffset[] */ 132 u32 aType[1]; /* Type values record decode. MUST BE LAST */ 133 }; 134 135 136 /* 137 ** A value for VdbeCursor.cacheStatus that means the cache is always invalid. 138 */ 139 #define CACHE_STALE 0 140 141 /* 142 ** When a sub-program is executed (OP_Program), a structure of this type 143 ** is allocated to store the current value of the program counter, as 144 ** well as the current memory cell array and various other frame specific 145 ** values stored in the Vdbe struct. When the sub-program is finished, 146 ** these values are copied back to the Vdbe from the VdbeFrame structure, 147 ** restoring the state of the VM to as it was before the sub-program 148 ** began executing. 149 ** 150 ** The memory for a VdbeFrame object is allocated and managed by a memory 151 ** cell in the parent (calling) frame. When the memory cell is deleted or 152 ** overwritten, the VdbeFrame object is not freed immediately. Instead, it 153 ** is linked into the Vdbe.pDelFrame list. The contents of the Vdbe.pDelFrame 154 ** list is deleted when the VM is reset in VdbeHalt(). The reason for doing 155 ** this instead of deleting the VdbeFrame immediately is to avoid recursive 156 ** calls to sqlite3VdbeMemRelease() when the memory cells belonging to the 157 ** child frame are released. 158 ** 159 ** The currently executing frame is stored in Vdbe.pFrame. Vdbe.pFrame is 160 ** set to NULL if the currently executing frame is the main program. 161 */ 162 typedef struct VdbeFrame VdbeFrame; 163 struct VdbeFrame { 164 Vdbe *v; /* VM this frame belongs to */ 165 VdbeFrame *pParent; /* Parent of this frame, or NULL if parent is main */ 166 Op *aOp; /* Program instructions for parent frame */ 167 i64 *anExec; /* Event counters from parent frame */ 168 Mem *aMem; /* Array of memory cells for parent frame */ 169 VdbeCursor **apCsr; /* Array of Vdbe cursors for parent frame */ 170 u8 *aOnce; /* Bitmask used by OP_Once */ 171 void *token; /* Copy of SubProgram.token */ 172 i64 lastRowid; /* Last insert rowid (sqlite3.lastRowid) */ 173 AuxData *pAuxData; /* Linked list of auxdata allocations */ 174 #if SQLITE_DEBUG 175 u32 iFrameMagic; /* magic number for sanity checking */ 176 #endif 177 int nCursor; /* Number of entries in apCsr */ 178 int pc; /* Program Counter in parent (calling) frame */ 179 int nOp; /* Size of aOp array */ 180 int nMem; /* Number of entries in aMem */ 181 int nChildMem; /* Number of memory cells for child frame */ 182 int nChildCsr; /* Number of cursors for child frame */ 183 int nChange; /* Statement changes (Vdbe.nChange) */ 184 int nDbChange; /* Value of db->nChange */ 185 }; 186 187 /* Magic number for sanity checking on VdbeFrame objects */ 188 #define SQLITE_FRAME_MAGIC 0x879fb71e 189 190 /* 191 ** Return a pointer to the array of registers allocated for use 192 ** by a VdbeFrame. 193 */ 194 #define VdbeFrameMem(p) ((Mem *)&((u8 *)p)[ROUND8(sizeof(VdbeFrame))]) 195 196 /* 197 ** Internally, the vdbe manipulates nearly all SQL values as Mem 198 ** structures. Each Mem struct may cache multiple representations (string, 199 ** integer etc.) of the same value. 200 */ 201 struct sqlite3_value { 202 union MemValue { 203 double r; /* Real value used when MEM_Real is set in flags */ 204 i64 i; /* Integer value used when MEM_Int is set in flags */ 205 int nZero; /* Extra zero bytes when MEM_Zero and MEM_Blob set */ 206 const char *zPType; /* Pointer type when MEM_Term|MEM_Subtype|MEM_Null */ 207 FuncDef *pDef; /* Used only when flags==MEM_Agg */ 208 } u; 209 u16 flags; /* Some combination of MEM_Null, MEM_Str, MEM_Dyn, etc. */ 210 u8 enc; /* SQLITE_UTF8, SQLITE_UTF16BE, SQLITE_UTF16LE */ 211 u8 eSubtype; /* Subtype for this value */ 212 int n; /* Number of characters in string value, excluding '\0' */ 213 char *z; /* String or BLOB value */ 214 /* ShallowCopy only needs to copy the information above */ 215 char *zMalloc; /* Space to hold MEM_Str or MEM_Blob if szMalloc>0 */ 216 int szMalloc; /* Size of the zMalloc allocation */ 217 u32 uTemp; /* Transient storage for serial_type in OP_MakeRecord */ 218 sqlite3 *db; /* The associated database connection */ 219 void (*xDel)(void*);/* Destructor for Mem.z - only valid if MEM_Dyn */ 220 #ifdef SQLITE_DEBUG 221 Mem *pScopyFrom; /* This Mem is a shallow copy of pScopyFrom */ 222 u16 mScopyFlags; /* flags value immediately after the shallow copy */ 223 #endif 224 }; 225 226 /* 227 ** Size of struct Mem not including the Mem.zMalloc member or anything that 228 ** follows. 229 */ 230 #define MEMCELLSIZE offsetof(Mem,zMalloc) 231 232 /* One or more of the following flags are set to indicate the validOK 233 ** representations of the value stored in the Mem struct. 234 ** 235 ** If the MEM_Null flag is set, then the value is an SQL NULL value. 236 ** For a pointer type created using sqlite3_bind_pointer() or 237 ** sqlite3_result_pointer() the MEM_Term and MEM_Subtype flags are also set. 238 ** 239 ** If the MEM_Str flag is set then Mem.z points at a string representation. 240 ** Usually this is encoded in the same unicode encoding as the main 241 ** database (see below for exceptions). If the MEM_Term flag is also 242 ** set, then the string is nul terminated. The MEM_Int and MEM_Real 243 ** flags may coexist with the MEM_Str flag. 244 */ 245 #define MEM_Null 0x0001 /* Value is NULL (or a pointer) */ 246 #define MEM_Str 0x0002 /* Value is a string */ 247 #define MEM_Int 0x0004 /* Value is an integer */ 248 #define MEM_Real 0x0008 /* Value is a real number */ 249 #define MEM_Blob 0x0010 /* Value is a BLOB */ 250 #define MEM_IntReal 0x0020 /* MEM_Int that stringifies like MEM_Real */ 251 #define MEM_AffMask 0x003f /* Mask of affinity bits */ 252 #define MEM_FromBind 0x0040 /* Value originates from sqlite3_bind() */ 253 #define MEM_Undefined 0x0080 /* Value is undefined */ 254 #define MEM_Cleared 0x0100 /* NULL set by OP_Null, not from data */ 255 #define MEM_TypeMask 0xc1bf /* Mask of type bits */ 256 257 258 /* Whenever Mem contains a valid string or blob representation, one of 259 ** the following flags must be set to determine the memory management 260 ** policy for Mem.z. The MEM_Term flag tells us whether or not the 261 ** string is \000 or \u0000 terminated 262 */ 263 #define MEM_Term 0x0200 /* String in Mem.z is zero terminated */ 264 #define MEM_Dyn 0x0400 /* Need to call Mem.xDel() on Mem.z */ 265 #define MEM_Static 0x0800 /* Mem.z points to a static string */ 266 #define MEM_Ephem 0x1000 /* Mem.z points to an ephemeral string */ 267 #define MEM_Agg 0x2000 /* Mem.z points to an agg function context */ 268 #define MEM_Zero 0x4000 /* Mem.i contains count of 0s appended to blob */ 269 #define MEM_Subtype 0x8000 /* Mem.eSubtype is valid */ 270 #ifdef SQLITE_OMIT_INCRBLOB 271 #undef MEM_Zero 272 #define MEM_Zero 0x0000 273 #endif 274 275 /* Return TRUE if Mem X contains dynamically allocated content - anything 276 ** that needs to be deallocated to avoid a leak. 277 */ 278 #define VdbeMemDynamic(X) \ 279 (((X)->flags&(MEM_Agg|MEM_Dyn))!=0) 280 281 /* 282 ** Clear any existing type flags from a Mem and replace them with f 283 */ 284 #define MemSetTypeFlag(p, f) \ 285 ((p)->flags = ((p)->flags&~(MEM_TypeMask|MEM_Zero))|f) 286 287 /* 288 ** True if Mem X is a NULL-nochng type. 289 */ 290 #define MemNullNochng(X) \ 291 (((X)->flags&MEM_TypeMask)==(MEM_Null|MEM_Zero) \ 292 && (X)->n==0 && (X)->u.nZero==0) 293 294 /* 295 ** Return true if a memory cell is not marked as invalid. This macro 296 ** is for use inside assert() statements only. 297 */ 298 #ifdef SQLITE_DEBUG 299 #define memIsValid(M) ((M)->flags & MEM_Undefined)==0 300 #endif 301 302 /* 303 ** Each auxiliary data pointer stored by a user defined function 304 ** implementation calling sqlite3_set_auxdata() is stored in an instance 305 ** of this structure. All such structures associated with a single VM 306 ** are stored in a linked list headed at Vdbe.pAuxData. All are destroyed 307 ** when the VM is halted (if not before). 308 */ 309 struct AuxData { 310 int iAuxOp; /* Instruction number of OP_Function opcode */ 311 int iAuxArg; /* Index of function argument. */ 312 void *pAux; /* Aux data pointer */ 313 void (*xDeleteAux)(void*); /* Destructor for the aux data */ 314 AuxData *pNextAux; /* Next element in list */ 315 }; 316 317 /* 318 ** The "context" argument for an installable function. A pointer to an 319 ** instance of this structure is the first argument to the routines used 320 ** implement the SQL functions. 321 ** 322 ** There is a typedef for this structure in sqlite.h. So all routines, 323 ** even the public interface to SQLite, can use a pointer to this structure. 324 ** But this file is the only place where the internal details of this 325 ** structure are known. 326 ** 327 ** This structure is defined inside of vdbeInt.h because it uses substructures 328 ** (Mem) which are only defined there. 329 */ 330 struct sqlite3_context { 331 Mem *pOut; /* The return value is stored here */ 332 FuncDef *pFunc; /* Pointer to function information */ 333 Mem *pMem; /* Memory cell used to store aggregate context */ 334 Vdbe *pVdbe; /* The VM that owns this context */ 335 int iOp; /* Instruction number of OP_Function */ 336 int isError; /* Error code returned by the function. */ 337 u8 skipFlag; /* Skip accumulator loading if true */ 338 u8 argc; /* Number of arguments */ 339 sqlite3_value *argv[1]; /* Argument set */ 340 }; 341 342 /* A bitfield type for use inside of structures. Always follow with :N where 343 ** N is the number of bits. 344 */ 345 typedef unsigned bft; /* Bit Field Type */ 346 347 /* The ScanStatus object holds a single value for the 348 ** sqlite3_stmt_scanstatus() interface. 349 */ 350 typedef struct ScanStatus ScanStatus; 351 struct ScanStatus { 352 int addrExplain; /* OP_Explain for loop */ 353 int addrLoop; /* Address of "loops" counter */ 354 int addrVisit; /* Address of "rows visited" counter */ 355 int iSelectID; /* The "Select-ID" for this loop */ 356 LogEst nEst; /* Estimated output rows per loop */ 357 char *zName; /* Name of table or index */ 358 }; 359 360 /* The DblquoteStr object holds the text of a double-quoted 361 ** string for a prepared statement. A linked list of these objects 362 ** is constructed during statement parsing and is held on Vdbe.pDblStr. 363 ** When computing a normalized SQL statement for an SQL statement, that 364 ** list is consulted for each double-quoted identifier to see if the 365 ** identifier should really be a string literal. 366 */ 367 typedef struct DblquoteStr DblquoteStr; 368 struct DblquoteStr { 369 DblquoteStr *pNextStr; /* Next string literal in the list */ 370 char z[8]; /* Dequoted value for the string */ 371 }; 372 373 /* 374 ** An instance of the virtual machine. This structure contains the complete 375 ** state of the virtual machine. 376 ** 377 ** The "sqlite3_stmt" structure pointer that is returned by sqlite3_prepare() 378 ** is really a pointer to an instance of this structure. 379 */ 380 struct Vdbe { 381 sqlite3 *db; /* The database connection that owns this statement */ 382 Vdbe *pPrev,*pNext; /* Linked list of VDBEs with the same Vdbe.db */ 383 Parse *pParse; /* Parsing context used to create this Vdbe */ 384 ynVar nVar; /* Number of entries in aVar[] */ 385 u32 iVdbeMagic; /* Magic number defining state of the SQL statement */ 386 int nMem; /* Number of memory locations currently allocated */ 387 int nCursor; /* Number of slots in apCsr[] */ 388 u32 cacheCtr; /* VdbeCursor row cache generation counter */ 389 int pc; /* The program counter */ 390 int rc; /* Value to return */ 391 int nChange; /* Number of db changes made since last reset */ 392 int iStatement; /* Statement number (or 0 if has no opened stmt) */ 393 i64 iCurrentTime; /* Value of julianday('now') for this statement */ 394 i64 nFkConstraint; /* Number of imm. FK constraints this VM */ 395 i64 nStmtDefCons; /* Number of def. constraints when stmt started */ 396 i64 nStmtDefImmCons; /* Number of def. imm constraints when stmt started */ 397 Mem *aMem; /* The memory locations */ 398 Mem **apArg; /* Arguments to currently executing user function */ 399 VdbeCursor **apCsr; /* One element of this array for each open cursor */ 400 Mem *aVar; /* Values for the OP_Variable opcode. */ 401 402 /* When allocating a new Vdbe object, all of the fields below should be 403 ** initialized to zero or NULL */ 404 405 Op *aOp; /* Space to hold the virtual machine's program */ 406 int nOp; /* Number of instructions in the program */ 407 int nOpAlloc; /* Slots allocated for aOp[] */ 408 Mem *aColName; /* Column names to return */ 409 Mem *pResultSet; /* Pointer to an array of results */ 410 char *zErrMsg; /* Error message written here */ 411 VList *pVList; /* Name of variables */ 412 #ifndef SQLITE_OMIT_TRACE 413 i64 startTime; /* Time when query started - used for profiling */ 414 #endif 415 #ifdef SQLITE_DEBUG 416 int rcApp; /* errcode set by sqlite3_result_error_code() */ 417 u32 nWrite; /* Number of write operations that have occurred */ 418 #endif 419 u16 nResColumn; /* Number of columns in one row of the result set */ 420 u8 errorAction; /* Recovery action to do in case of an error */ 421 u8 minWriteFileFormat; /* Minimum file format for writable database files */ 422 u8 prepFlags; /* SQLITE_PREPARE_* flags */ 423 u8 doingRerun; /* True if rerunning after an auto-reprepare */ 424 bft expired:2; /* 1: recompile VM immediately 2: when convenient */ 425 bft explain:2; /* True if EXPLAIN present on SQL command */ 426 bft changeCntOn:1; /* True to update the change-counter */ 427 bft runOnlyOnce:1; /* Automatically expire on reset */ 428 bft usesStmtJournal:1; /* True if uses a statement journal */ 429 bft readOnly:1; /* True for statements that do not write */ 430 bft bIsReader:1; /* True for statements that read */ 431 yDbMask btreeMask; /* Bitmask of db->aDb[] entries referenced */ 432 yDbMask lockMask; /* Subset of btreeMask that requires a lock */ 433 u32 aCounter[7]; /* Counters used by sqlite3_stmt_status() */ 434 char *zSql; /* Text of the SQL statement that generated this */ 435 #ifdef SQLITE_ENABLE_NORMALIZE 436 char *zNormSql; /* Normalization of the associated SQL statement */ 437 DblquoteStr *pDblStr; /* List of double-quoted string literals */ 438 #endif 439 void *pFree; /* Free this when deleting the vdbe */ 440 VdbeFrame *pFrame; /* Parent frame */ 441 VdbeFrame *pDelFrame; /* List of frame objects to free on VM reset */ 442 int nFrame; /* Number of frames in pFrame list */ 443 u32 expmask; /* Binding to these vars invalidates VM */ 444 SubProgram *pProgram; /* Linked list of all sub-programs used by VM */ 445 AuxData *pAuxData; /* Linked list of auxdata allocations */ 446 #ifdef SQLITE_ENABLE_STMT_SCANSTATUS 447 i64 *anExec; /* Number of times each op has been executed */ 448 int nScan; /* Entries in aScan[] */ 449 ScanStatus *aScan; /* Scan definitions for sqlite3_stmt_scanstatus() */ 450 #endif 451 }; 452 453 /* 454 ** The following are allowed values for Vdbe.magic 455 */ 456 #define VDBE_MAGIC_INIT 0x16bceaa5 /* Building a VDBE program */ 457 #define VDBE_MAGIC_RUN 0x2df20da3 /* VDBE is ready to execute */ 458 #define VDBE_MAGIC_HALT 0x319c2973 /* VDBE has completed execution */ 459 #define VDBE_MAGIC_RESET 0x48fa9f76 /* Reset and ready to run again */ 460 #define VDBE_MAGIC_DEAD 0x5606c3c8 /* The VDBE has been deallocated */ 461 462 /* 463 ** Structure used to store the context required by the 464 ** sqlite3_preupdate_*() API functions. 465 */ 466 struct PreUpdate { 467 Vdbe *v; 468 VdbeCursor *pCsr; /* Cursor to read old values from */ 469 int op; /* One of SQLITE_INSERT, UPDATE, DELETE */ 470 u8 *aRecord; /* old.* database record */ 471 KeyInfo keyinfo; 472 UnpackedRecord *pUnpacked; /* Unpacked version of aRecord[] */ 473 UnpackedRecord *pNewUnpacked; /* Unpacked version of new.* record */ 474 int iNewReg; /* Register for new.* values */ 475 int iBlobWrite; /* Value returned by preupdate_blobwrite() */ 476 i64 iKey1; /* First key value passed to hook */ 477 i64 iKey2; /* Second key value passed to hook */ 478 Mem *aNew; /* Array of new.* values */ 479 Table *pTab; /* Schema object being upated */ 480 Index *pPk; /* PK index if pTab is WITHOUT ROWID */ 481 }; 482 483 /* 484 ** Function prototypes 485 */ 486 void sqlite3VdbeError(Vdbe*, const char *, ...); 487 void sqlite3VdbeFreeCursor(Vdbe *, VdbeCursor*); 488 void sqliteVdbePopStack(Vdbe*,int); 489 int SQLITE_NOINLINE sqlite3VdbeFinishMoveto(VdbeCursor*); 490 int sqlite3VdbeCursorMoveto(VdbeCursor**, u32*); 491 int sqlite3VdbeCursorRestore(VdbeCursor*); 492 u32 sqlite3VdbeSerialTypeLen(u32); 493 u8 sqlite3VdbeOneByteSerialTypeLen(u8); 494 u32 sqlite3VdbeSerialPut(unsigned char*, Mem*, u32); 495 u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*); 496 void sqlite3VdbeDeleteAuxData(sqlite3*, AuxData**, int, int); 497 498 int sqlite2BtreeKeyCompare(BtCursor *, const void *, int, int, int *); 499 int sqlite3VdbeIdxKeyCompare(sqlite3*,VdbeCursor*,UnpackedRecord*,int*); 500 int sqlite3VdbeIdxRowid(sqlite3*, BtCursor*, i64*); 501 int sqlite3VdbeExec(Vdbe*); 502 #if !defined(SQLITE_OMIT_EXPLAIN) || defined(SQLITE_ENABLE_BYTECODE_VTAB) 503 int sqlite3VdbeNextOpcode(Vdbe*,Mem*,int,int*,int*,Op**); 504 char *sqlite3VdbeDisplayP4(sqlite3*,Op*); 505 #endif 506 #if defined(SQLITE_ENABLE_EXPLAIN_COMMENTS) 507 char *sqlite3VdbeDisplayComment(sqlite3*,const Op*,const char*); 508 #endif 509 #if !defined(SQLITE_OMIT_EXPLAIN) 510 int sqlite3VdbeList(Vdbe*); 511 #endif 512 int sqlite3VdbeHalt(Vdbe*); 513 int sqlite3VdbeChangeEncoding(Mem *, int); 514 int sqlite3VdbeMemTooBig(Mem*); 515 int sqlite3VdbeMemCopy(Mem*, const Mem*); 516 void sqlite3VdbeMemShallowCopy(Mem*, const Mem*, int); 517 void sqlite3VdbeMemMove(Mem*, Mem*); 518 int sqlite3VdbeMemNulTerminate(Mem*); 519 int sqlite3VdbeMemSetStr(Mem*, const char*, i64, u8, void(*)(void*)); 520 void sqlite3VdbeMemSetInt64(Mem*, i64); 521 #ifdef SQLITE_OMIT_FLOATING_POINT 522 # define sqlite3VdbeMemSetDouble sqlite3VdbeMemSetInt64 523 #else 524 void sqlite3VdbeMemSetDouble(Mem*, double); 525 #endif 526 void sqlite3VdbeMemSetPointer(Mem*, void*, const char*, void(*)(void*)); 527 void sqlite3VdbeMemInit(Mem*,sqlite3*,u16); 528 void sqlite3VdbeMemSetNull(Mem*); 529 void sqlite3VdbeMemSetZeroBlob(Mem*,int); 530 #ifdef SQLITE_DEBUG 531 int sqlite3VdbeMemIsRowSet(const Mem*); 532 #endif 533 int sqlite3VdbeMemSetRowSet(Mem*); 534 int sqlite3VdbeMemMakeWriteable(Mem*); 535 int sqlite3VdbeMemStringify(Mem*, u8, u8); 536 i64 sqlite3VdbeIntValue(Mem*); 537 int sqlite3VdbeMemIntegerify(Mem*); 538 double sqlite3VdbeRealValue(Mem*); 539 int sqlite3VdbeBooleanValue(Mem*, int ifNull); 540 void sqlite3VdbeIntegerAffinity(Mem*); 541 int sqlite3VdbeMemRealify(Mem*); 542 int sqlite3VdbeMemNumerify(Mem*); 543 int sqlite3VdbeMemCast(Mem*,u8,u8); 544 int sqlite3VdbeMemFromBtree(BtCursor*,u32,u32,Mem*); 545 int sqlite3VdbeMemFromBtreeZeroOffset(BtCursor*,u32,Mem*); 546 void sqlite3VdbeMemRelease(Mem *p); 547 int sqlite3VdbeMemFinalize(Mem*, FuncDef*); 548 #ifndef SQLITE_OMIT_WINDOWFUNC 549 int sqlite3VdbeMemAggValue(Mem*, Mem*, FuncDef*); 550 #endif 551 #if !defined(SQLITE_OMIT_EXPLAIN) || defined(SQLITE_ENABLE_BYTECODE_VTAB) 552 const char *sqlite3OpcodeName(int); 553 #endif 554 int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve); 555 int sqlite3VdbeMemClearAndResize(Mem *pMem, int n); 556 int sqlite3VdbeCloseStatement(Vdbe *, int); 557 #ifdef SQLITE_DEBUG 558 int sqlite3VdbeFrameIsValid(VdbeFrame*); 559 #endif 560 void sqlite3VdbeFrameMemDel(void*); /* Destructor on Mem */ 561 void sqlite3VdbeFrameDelete(VdbeFrame*); /* Actually deletes the Frame */ 562 int sqlite3VdbeFrameRestore(VdbeFrame *); 563 #ifdef SQLITE_ENABLE_PREUPDATE_HOOK 564 void sqlite3VdbePreUpdateHook( 565 Vdbe*,VdbeCursor*,int,const char*,Table*,i64,int,int); 566 #endif 567 int sqlite3VdbeTransferError(Vdbe *p); 568 569 int sqlite3VdbeSorterInit(sqlite3 *, int, VdbeCursor *); 570 void sqlite3VdbeSorterReset(sqlite3 *, VdbeSorter *); 571 void sqlite3VdbeSorterClose(sqlite3 *, VdbeCursor *); 572 int sqlite3VdbeSorterRowkey(const VdbeCursor *, Mem *); 573 int sqlite3VdbeSorterNext(sqlite3 *, const VdbeCursor *); 574 int sqlite3VdbeSorterRewind(const VdbeCursor *, int *); 575 int sqlite3VdbeSorterWrite(const VdbeCursor *, Mem *); 576 int sqlite3VdbeSorterCompare(const VdbeCursor *, Mem *, int, int *); 577 578 #ifdef SQLITE_DEBUG 579 void sqlite3VdbeIncrWriteCounter(Vdbe*, VdbeCursor*); 580 void sqlite3VdbeAssertAbortable(Vdbe*); 581 #else 582 # define sqlite3VdbeIncrWriteCounter(V,C) 583 # define sqlite3VdbeAssertAbortable(V) 584 #endif 585 586 #if !defined(SQLITE_OMIT_SHARED_CACHE) 587 void sqlite3VdbeEnter(Vdbe*); 588 #else 589 # define sqlite3VdbeEnter(X) 590 #endif 591 592 #if !defined(SQLITE_OMIT_SHARED_CACHE) && SQLITE_THREADSAFE>0 593 void sqlite3VdbeLeave(Vdbe*); 594 #else 595 # define sqlite3VdbeLeave(X) 596 #endif 597 598 #ifdef SQLITE_DEBUG 599 void sqlite3VdbeMemAboutToChange(Vdbe*,Mem*); 600 int sqlite3VdbeCheckMemInvariants(Mem*); 601 #endif 602 603 #ifndef SQLITE_OMIT_FOREIGN_KEY 604 int sqlite3VdbeCheckFk(Vdbe *, int); 605 #else 606 # define sqlite3VdbeCheckFk(p,i) 0 607 #endif 608 609 #ifdef SQLITE_DEBUG 610 void sqlite3VdbePrintSql(Vdbe*); 611 void sqlite3VdbeMemPrettyPrint(Mem *pMem, StrAccum *pStr); 612 #endif 613 #ifndef SQLITE_OMIT_UTF16 614 int sqlite3VdbeMemTranslate(Mem*, u8); 615 int sqlite3VdbeMemHandleBom(Mem *pMem); 616 #endif 617 618 #ifndef SQLITE_OMIT_INCRBLOB 619 int sqlite3VdbeMemExpandBlob(Mem *); 620 #define ExpandBlob(P) (((P)->flags&MEM_Zero)?sqlite3VdbeMemExpandBlob(P):0) 621 #else 622 #define sqlite3VdbeMemExpandBlob(x) SQLITE_OK 623 #define ExpandBlob(P) SQLITE_OK 624 #endif 625 626 #endif /* !defined(SQLITE_VDBEINT_H) */ 627