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Overview
| Comment: | Slightly faster function dispatch in the virtual machine by avoiding unnecessary reinitialization of variables that are already correctly initialized. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: | edd4e6876cc08ab907bb21f075380de946562d4c56a04923760848b4b11536ac |
| User & Date: | drh 2018-01-23 03:44:06 |
Context
|
2018-01-23
| ||
| 04:22 | Slightly faster implementation of the length() SQL function. check-in: 9a4199ae user: drh tags: trunk | |
| 03:44 | Slightly faster function dispatch in the virtual machine by avoiding unnecessary reinitialization of variables that are already correctly initialized. check-in: edd4e687 user: drh tags: trunk | |
| 00:17 | Simplify one of the compiler warning fixes from the previous check-in. check-in: 012d7d49 user: mistachkin tags: trunk | |
Changes
Changes to src/func.c.
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}
/*
** Indicate that the accumulator load should be skipped on this
** iteration of the aggregate loop.
*/
static void sqlite3SkipAccumulatorLoad(sqlite3_context *context){
context->skipFlag = 1;
}
/*
** Implementation of the non-aggregate min() and max() functions
*/
static void minmaxFunc(
|
> |
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}
/*
** Indicate that the accumulator load should be skipped on this
** iteration of the aggregate loop.
*/
static void sqlite3SkipAccumulatorLoad(sqlite3_context *context){
if( context->isError==0 ) context->isError = -1;
context->skipFlag = 1;
}
/*
** Implementation of the non-aggregate min() and max() functions
*/
static void minmaxFunc(
|
Changes to src/vdbe.c.
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sqlite3_context *pCtx; assert( pOp->p4type==P4_FUNCDEF ); n = pOp->p5; assert( pOp->p3>0 && pOp->p3<=(p->nMem+1 - p->nCursor) ); assert( n==0 || (pOp->p2>0 && pOp->p2+n<=(p->nMem+1 - p->nCursor)+1) ); assert( pOp->p3<pOp->p2 || pOp->p3>=pOp->p2+n ); pCtx = sqlite3DbMallocRawNN(db, sizeof(*pCtx) + (n-1)*sizeof(sqlite3_value*)); if( pCtx==0 ) goto no_mem; pCtx->pMem = 0; pCtx->pFunc = pOp->p4.pFunc; pCtx->iOp = (int)(pOp - aOp); pCtx->pVdbe = p; pCtx->argc = n; pOp->p4type = P4_FUNCCTX; pOp->p4.pCtx = pCtx; pOp->opcode = OP_AggStep; /* Fall through into OP_AggStep */ } case OP_AggStep: { int i; sqlite3_context *pCtx; Mem *pMem; Mem t; assert( pOp->p4type==P4_FUNCCTX ); pCtx = pOp->p4.pCtx; pMem = &aMem[pOp->p3]; /* If this function is inside of a trigger, the register array in aMem[] ** might change from one evaluation to the next. The next block of code ................................................................................ for(i=0; i<pCtx->argc; i++){ assert( memIsValid(pCtx->argv[i]) ); REGISTER_TRACE(pOp->p2+i, pCtx->argv[i]); } #endif pMem->n++; sqlite3VdbeMemInit(&t, db, MEM_Null); pCtx->pOut = &t; pCtx->fErrorOrAux = 0; pCtx->skipFlag = 0; (pCtx->pFunc->xSFunc)(pCtx,pCtx->argc,pCtx->argv); /* IMP: R-24505-23230 */ if( pCtx->fErrorOrAux ){ if( pCtx->isError ){ sqlite3VdbeError(p, "%s", sqlite3_value_text(&t)); rc = pCtx->isError; } sqlite3VdbeMemRelease(&t); if( rc ) goto abort_due_to_error; }else{ assert( t.flags==MEM_Null ); } if( pCtx->skipFlag ){ assert( pOp[-1].opcode==OP_CollSeq ); i = pOp[-1].p1; if( i ) sqlite3VdbeMemSetInt64(&aMem[i], 1); } break; } /* Opcode: AggFinal P1 P2 * P4 * ** Synopsis: accum=r[P1] N=P2 ** ** Execute the finalizer function for an aggregate. P1 is ................................................................................ pDest->flags = MEM_Null|MEM_Zero; pDest->u.nZero = 0; }else{ MemSetTypeFlag(pDest, MEM_Null); } rc = pModule->xColumn(pCur->uc.pVCur, &sContext, pOp->p2); sqlite3VtabImportErrmsg(p, pVtab); if( sContext.isError ){ rc = sContext.isError; } sqlite3VdbeChangeEncoding(pDest, encoding); REGISTER_TRACE(pOp->p3, pDest); UPDATE_MAX_BLOBSIZE(pDest); if( sqlite3VdbeMemTooBig(pDest) ){ ................................................................................ assert( pOp->p3<pOp->p2 || pOp->p3>=pOp->p2+n ); pCtx = sqlite3DbMallocRawNN(db, sizeof(*pCtx) + (n-1)*sizeof(sqlite3_value*)); if( pCtx==0 ) goto no_mem; pCtx->pOut = 0; pCtx->pFunc = pOp->p4.pFunc; pCtx->iOp = (int)(pOp - aOp); pCtx->pVdbe = p; pCtx->argc = n; pOp->p4type = P4_FUNCCTX; pOp->p4.pCtx = pCtx; assert( OP_PureFunc == OP_PureFunc0+2 ); assert( OP_Function == OP_Function0+2 ); pOp->opcode += 2; /* Fall through into OP_Function */ ................................................................................ #ifdef SQLITE_DEBUG for(i=0; i<pCtx->argc; i++){ assert( memIsValid(pCtx->argv[i]) ); REGISTER_TRACE(pOp->p2+i, pCtx->argv[i]); } #endif MemSetTypeFlag(pOut, MEM_Null); pCtx->fErrorOrAux = 0; (*pCtx->pFunc->xSFunc)(pCtx, pCtx->argc, pCtx->argv);/* IMP: R-24505-23230 */ /* If the function returned an error, throw an exception */ if( pCtx->fErrorOrAux ){ if( pCtx->isError ){ sqlite3VdbeError(p, "%s", sqlite3_value_text(pOut)); rc = pCtx->isError; } sqlite3VdbeDeleteAuxData(db, &p->pAuxData, pCtx->iOp, pOp->p1); if( rc ) goto abort_due_to_error; } /* Copy the result of the function into register P3 */ if( pOut->flags & (MEM_Str|MEM_Blob) ){ sqlite3VdbeChangeEncoding(pOut, encoding); if( sqlite3VdbeMemTooBig(pOut) ) goto too_big; |
| > > > > > < | | < | | | | < < < < < | | | | > | > > > > > > > | > | | | > |
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sqlite3_context *pCtx; assert( pOp->p4type==P4_FUNCDEF ); n = pOp->p5; assert( pOp->p3>0 && pOp->p3<=(p->nMem+1 - p->nCursor) ); assert( n==0 || (pOp->p2>0 && pOp->p2+n<=(p->nMem+1 - p->nCursor)+1) ); assert( pOp->p3<pOp->p2 || pOp->p3>=pOp->p2+n ); pCtx = sqlite3DbMallocRawNN(db, n*sizeof(sqlite3_value*) + (sizeof(pCtx[0]) + sizeof(Mem) - sizeof(sqlite3_value*))); if( pCtx==0 ) goto no_mem; pCtx->pMem = 0; pCtx->pOut = (Mem*)&(pCtx->argv[n]); sqlite3VdbeMemInit(pCtx->pOut, db, MEM_Null); pCtx->pFunc = pOp->p4.pFunc; pCtx->iOp = (int)(pOp - aOp); pCtx->pVdbe = p; pCtx->skipFlag = 0; pCtx->isError = 0; pCtx->argc = n; pOp->p4type = P4_FUNCCTX; pOp->p4.pCtx = pCtx; pOp->opcode = OP_AggStep; /* Fall through into OP_AggStep */ } case OP_AggStep: { int i; sqlite3_context *pCtx; Mem *pMem; assert( pOp->p4type==P4_FUNCCTX ); pCtx = pOp->p4.pCtx; pMem = &aMem[pOp->p3]; /* If this function is inside of a trigger, the register array in aMem[] ** might change from one evaluation to the next. The next block of code ................................................................................ for(i=0; i<pCtx->argc; i++){ assert( memIsValid(pCtx->argv[i]) ); REGISTER_TRACE(pOp->p2+i, pCtx->argv[i]); } #endif pMem->n++; assert( pCtx->pOut->flags==MEM_Null ); assert( pCtx->isError==0 ); assert( pCtx->skipFlag==0 ); (pCtx->pFunc->xSFunc)(pCtx,pCtx->argc,pCtx->argv); /* IMP: R-24505-23230 */ if( pCtx->isError ){ if( pCtx->isError>0 ){ sqlite3VdbeError(p, "%s", sqlite3_value_text(pCtx->pOut)); rc = pCtx->isError; } if( pCtx->skipFlag ){ assert( pOp[-1].opcode==OP_CollSeq ); i = pOp[-1].p1; if( i ) sqlite3VdbeMemSetInt64(&aMem[i], 1); pCtx->skipFlag = 0; } sqlite3VdbeMemRelease(pCtx->pOut); pCtx->pOut->flags = MEM_Null; pCtx->isError = 0; if( rc ) goto abort_due_to_error; } assert( pCtx->pOut->flags==MEM_Null ); assert( pCtx->skipFlag==0 ); break; } /* Opcode: AggFinal P1 P2 * P4 * ** Synopsis: accum=r[P1] N=P2 ** ** Execute the finalizer function for an aggregate. P1 is ................................................................................ pDest->flags = MEM_Null|MEM_Zero; pDest->u.nZero = 0; }else{ MemSetTypeFlag(pDest, MEM_Null); } rc = pModule->xColumn(pCur->uc.pVCur, &sContext, pOp->p2); sqlite3VtabImportErrmsg(p, pVtab); if( sContext.isError>0 ){ rc = sContext.isError; } sqlite3VdbeChangeEncoding(pDest, encoding); REGISTER_TRACE(pOp->p3, pDest); UPDATE_MAX_BLOBSIZE(pDest); if( sqlite3VdbeMemTooBig(pDest) ){ ................................................................................ assert( pOp->p3<pOp->p2 || pOp->p3>=pOp->p2+n ); pCtx = sqlite3DbMallocRawNN(db, sizeof(*pCtx) + (n-1)*sizeof(sqlite3_value*)); if( pCtx==0 ) goto no_mem; pCtx->pOut = 0; pCtx->pFunc = pOp->p4.pFunc; pCtx->iOp = (int)(pOp - aOp); pCtx->pVdbe = p; pCtx->isError = 0; pCtx->argc = n; pOp->p4type = P4_FUNCCTX; pOp->p4.pCtx = pCtx; assert( OP_PureFunc == OP_PureFunc0+2 ); assert( OP_Function == OP_Function0+2 ); pOp->opcode += 2; /* Fall through into OP_Function */ ................................................................................ #ifdef SQLITE_DEBUG for(i=0; i<pCtx->argc; i++){ assert( memIsValid(pCtx->argv[i]) ); REGISTER_TRACE(pOp->p2+i, pCtx->argv[i]); } #endif MemSetTypeFlag(pOut, MEM_Null); assert( pCtx->isError==0 ); (*pCtx->pFunc->xSFunc)(pCtx, pCtx->argc, pCtx->argv);/* IMP: R-24505-23230 */ /* If the function returned an error, throw an exception */ if( pCtx->isError ){ if( pCtx->isError>0 ){ sqlite3VdbeError(p, "%s", sqlite3_value_text(pOut)); rc = pCtx->isError; } sqlite3VdbeDeleteAuxData(db, &p->pAuxData, pCtx->iOp, pOp->p1); pCtx->isError = 0; if( rc ) goto abort_due_to_error; } /* Copy the result of the function into register P3 */ if( pOut->flags & (MEM_Str|MEM_Blob) ){ sqlite3VdbeChangeEncoding(pOut, encoding); if( sqlite3VdbeMemTooBig(pOut) ) goto too_big; |
Changes to src/vdbeInt.h.
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/* One or more of the following flags are set to indicate the validOK ** representations of the value stored in the Mem struct. ** ** If the MEM_Null flag is set, then the value is an SQL NULL value. ** For a pointer type created using sqlite3_bind_pointer() or ** sqlite3_result_pointer() the MEM_Term and MEM_Subtype flags are also set. ** If both MEM_Null and MEM_Zero are set, that means that the value is ** an unchanging column value from VColumn. ** ** If the MEM_Str flag is set then Mem.z points at a string representation. ** Usually this is encoded in the same unicode encoding as the main ** database (see below for exceptions). If the MEM_Term flag is also ** set, then the string is nul terminated. The MEM_Int and MEM_Real ** flags may coexist with the MEM_Str flag. */ ................................................................................ Mem *pOut; /* The return value is stored here */ FuncDef *pFunc; /* Pointer to function information */ Mem *pMem; /* Memory cell used to store aggregate context */ Vdbe *pVdbe; /* The VM that owns this context */ int iOp; /* Instruction number of OP_Function */ int isError; /* Error code returned by the function. */ u8 skipFlag; /* Skip accumulator loading if true */ u8 fErrorOrAux; /* isError!=0 or pVdbe->pAuxData modified */ u8 argc; /* Number of arguments */ sqlite3_value *argv[1]; /* Argument set */ }; /* A bitfield type for use inside of structures. Always follow with :N where ** N is the number of bits. */ |
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/* One or more of the following flags are set to indicate the validOK
** representations of the value stored in the Mem struct.
**
** If the MEM_Null flag is set, then the value is an SQL NULL value.
** For a pointer type created using sqlite3_bind_pointer() or
** sqlite3_result_pointer() the MEM_Term and MEM_Subtype flags are also set.
**
** If the MEM_Str flag is set then Mem.z points at a string representation.
** Usually this is encoded in the same unicode encoding as the main
** database (see below for exceptions). If the MEM_Term flag is also
** set, then the string is nul terminated. The MEM_Int and MEM_Real
** flags may coexist with the MEM_Str flag.
*/
................................................................................
Mem *pOut; /* The return value is stored here */
FuncDef *pFunc; /* Pointer to function information */
Mem *pMem; /* Memory cell used to store aggregate context */
Vdbe *pVdbe; /* The VM that owns this context */
int iOp; /* Instruction number of OP_Function */
int isError; /* Error code returned by the function. */
u8 skipFlag; /* Skip accumulator loading if true */
u8 argc; /* Number of arguments */
sqlite3_value *argv[1]; /* Argument set */
};
/* A bitfield type for use inside of structures. Always follow with :N where
** N is the number of bits.
*/
|
Changes to src/vdbeapi.c.
368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 ... 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 ... 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 |
void sqlite3_result_double(sqlite3_context *pCtx, double rVal){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
sqlite3VdbeMemSetDouble(pCtx->pOut, rVal);
}
void sqlite3_result_error(sqlite3_context *pCtx, const char *z, int n){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
pCtx->isError = SQLITE_ERROR;
pCtx->fErrorOrAux = 1;
sqlite3VdbeMemSetStr(pCtx->pOut, z, n, SQLITE_UTF8, SQLITE_TRANSIENT);
}
#ifndef SQLITE_OMIT_UTF16
void sqlite3_result_error16(sqlite3_context *pCtx, const void *z, int n){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
pCtx->isError = SQLITE_ERROR;
pCtx->fErrorOrAux = 1;
sqlite3VdbeMemSetStr(pCtx->pOut, z, n, SQLITE_UTF16NATIVE, SQLITE_TRANSIENT);
}
#endif
void sqlite3_result_int(sqlite3_context *pCtx, int iVal){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
sqlite3VdbeMemSetInt64(pCtx->pOut, (i64)iVal);
}
................................................................................
if( n>(u64)pOut->db->aLimit[SQLITE_LIMIT_LENGTH] ){
return SQLITE_TOOBIG;
}
sqlite3VdbeMemSetZeroBlob(pCtx->pOut, (int)n);
return SQLITE_OK;
}
void sqlite3_result_error_code(sqlite3_context *pCtx, int errCode){
pCtx->isError = errCode;
pCtx->fErrorOrAux = 1;
#ifdef SQLITE_DEBUG
if( pCtx->pVdbe ) pCtx->pVdbe->rcApp = errCode;
#endif
if( pCtx->pOut->flags & MEM_Null ){
sqlite3VdbeMemSetStr(pCtx->pOut, sqlite3ErrStr(errCode), -1,
SQLITE_UTF8, SQLITE_STATIC);
}
}
/* Force an SQLITE_TOOBIG error. */
void sqlite3_result_error_toobig(sqlite3_context *pCtx){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
pCtx->isError = SQLITE_TOOBIG;
pCtx->fErrorOrAux = 1;
sqlite3VdbeMemSetStr(pCtx->pOut, "string or blob too big", -1,
SQLITE_UTF8, SQLITE_STATIC);
}
/* An SQLITE_NOMEM error. */
void sqlite3_result_error_nomem(sqlite3_context *pCtx){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
sqlite3VdbeMemSetNull(pCtx->pOut);
pCtx->isError = SQLITE_NOMEM_BKPT;
pCtx->fErrorOrAux = 1;
sqlite3OomFault(pCtx->pOut->db);
}
/*
** This function is called after a transaction has been committed. It
** invokes callbacks registered with sqlite3_wal_hook() as required.
*/
................................................................................
if( pAuxData==0 ){
pAuxData = sqlite3DbMallocZero(pVdbe->db, sizeof(AuxData));
if( !pAuxData ) goto failed;
pAuxData->iAuxOp = pCtx->iOp;
pAuxData->iAuxArg = iArg;
pAuxData->pNextAux = pVdbe->pAuxData;
pVdbe->pAuxData = pAuxData;
if( pCtx->fErrorOrAux==0 ){
pCtx->isError = 0;
pCtx->fErrorOrAux = 1;
}
}else if( pAuxData->xDeleteAux ){
pAuxData->xDeleteAux(pAuxData->pAux);
}
pAuxData->pAux = pAux;
pAuxData->xDeleteAux = xDelete;
return;
|
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void sqlite3_result_double(sqlite3_context *pCtx, double rVal){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
sqlite3VdbeMemSetDouble(pCtx->pOut, rVal);
}
void sqlite3_result_error(sqlite3_context *pCtx, const char *z, int n){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
pCtx->isError = SQLITE_ERROR;
sqlite3VdbeMemSetStr(pCtx->pOut, z, n, SQLITE_UTF8, SQLITE_TRANSIENT);
}
#ifndef SQLITE_OMIT_UTF16
void sqlite3_result_error16(sqlite3_context *pCtx, const void *z, int n){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
pCtx->isError = SQLITE_ERROR;
sqlite3VdbeMemSetStr(pCtx->pOut, z, n, SQLITE_UTF16NATIVE, SQLITE_TRANSIENT);
}
#endif
void sqlite3_result_int(sqlite3_context *pCtx, int iVal){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
sqlite3VdbeMemSetInt64(pCtx->pOut, (i64)iVal);
}
................................................................................
if( n>(u64)pOut->db->aLimit[SQLITE_LIMIT_LENGTH] ){
return SQLITE_TOOBIG;
}
sqlite3VdbeMemSetZeroBlob(pCtx->pOut, (int)n);
return SQLITE_OK;
}
void sqlite3_result_error_code(sqlite3_context *pCtx, int errCode){
pCtx->isError = errCode ? errCode : -1;
#ifdef SQLITE_DEBUG
if( pCtx->pVdbe ) pCtx->pVdbe->rcApp = errCode;
#endif
if( pCtx->pOut->flags & MEM_Null ){
sqlite3VdbeMemSetStr(pCtx->pOut, sqlite3ErrStr(errCode), -1,
SQLITE_UTF8, SQLITE_STATIC);
}
}
/* Force an SQLITE_TOOBIG error. */
void sqlite3_result_error_toobig(sqlite3_context *pCtx){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
pCtx->isError = SQLITE_TOOBIG;
sqlite3VdbeMemSetStr(pCtx->pOut, "string or blob too big", -1,
SQLITE_UTF8, SQLITE_STATIC);
}
/* An SQLITE_NOMEM error. */
void sqlite3_result_error_nomem(sqlite3_context *pCtx){
assert( sqlite3_mutex_held(pCtx->pOut->db->mutex) );
sqlite3VdbeMemSetNull(pCtx->pOut);
pCtx->isError = SQLITE_NOMEM_BKPT;
sqlite3OomFault(pCtx->pOut->db);
}
/*
** This function is called after a transaction has been committed. It
** invokes callbacks registered with sqlite3_wal_hook() as required.
*/
................................................................................
if( pAuxData==0 ){
pAuxData = sqlite3DbMallocZero(pVdbe->db, sizeof(AuxData));
if( !pAuxData ) goto failed;
pAuxData->iAuxOp = pCtx->iOp;
pAuxData->iAuxArg = iArg;
pAuxData->pNextAux = pVdbe->pAuxData;
pVdbe->pAuxData = pAuxData;
if( pCtx->isError==0 ) pCtx->isError = -1;
}else if( pAuxData->xDeleteAux ){
pAuxData->xDeleteAux(pAuxData->pAux);
}
pAuxData->pAux = pAux;
pAuxData->xDeleteAux = xDelete;
return;
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