Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | Performance improvements to the comparison operators in the bytecode engine. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
37803b19d219f4107f29b240d5d31460 |
| User & Date: | drh 2016-09-09 19:33:00 |
Context
|
2016-09-09
| ||
| 20:23 | Remove an unnecessary call to sqlite3VdbeMemExpandBlob() when casting to text. (check-in: 19e2e595 user: drh tags: trunk) | |
| 19:33 | Performance improvements to the comparison operators in the bytecode engine. (check-in: 37803b19 user: drh tags: trunk) | |
| 15:12 | Fix a out-of-order variable declaration for some compile-time configurations. (check-in: 6ac932c9 user: drh tags: trunk) | |
Changes
Changes to src/vdbe.c.
2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 |
}else{
/* Neither operand is NULL. Do a comparison. */
affinity = pOp->p5 & SQLITE_AFF_MASK;
if( affinity>=SQLITE_AFF_NUMERIC ){
if( (flags1 | flags3)&MEM_Str ){
if( (flags1 & (MEM_Int|MEM_Real|MEM_Str))==MEM_Str ){
applyNumericAffinity(pIn1,0);
flags3 = pIn3->flags;
}
if( (flags3 & (MEM_Int|MEM_Real|MEM_Str))==MEM_Str ){
applyNumericAffinity(pIn3,0);
}
}
}else if( affinity==SQLITE_AFF_TEXT ){
if( (flags1 & MEM_Str)==0 && (flags1 & (MEM_Int|MEM_Real))!=0 ){
testcase( pIn1->flags & MEM_Int );
testcase( pIn1->flags & MEM_Real );
sqlite3VdbeMemStringify(pIn1, encoding, 1);
testcase( (flags1&MEM_Dyn) != (pIn1->flags&MEM_Dyn) );
flags1 = (pIn1->flags & ~MEM_TypeMask) | (flags1 & MEM_TypeMask);
flags3 = pIn3->flags;
}
if( (flags3 & MEM_Str)==0 && (flags3 & (MEM_Int|MEM_Real))!=0 ){
testcase( pIn3->flags & MEM_Int );
testcase( pIn3->flags & MEM_Real );
sqlite3VdbeMemStringify(pIn3, encoding, 1);
testcase( (flags3&MEM_Dyn) != (pIn3->flags&MEM_Dyn) );
flags3 = (pIn3->flags & ~MEM_TypeMask) | (flags3 & MEM_TypeMask);
}
}
assert( pOp->p4type==P4_COLLSEQ || pOp->p4.pColl==0 );
if( flags1 & MEM_Zero ){
sqlite3VdbeMemExpandBlob(pIn1);
flags1 &= ~MEM_Zero;
}
if( flags3 & MEM_Zero ){
sqlite3VdbeMemExpandBlob(pIn3);
flags3 &= ~MEM_Zero;
}
res = sqlite3MemCompare(pIn3, pIn1, pOp->p4.pColl);
}
switch( pOp->opcode ){
case OP_Eq: res2 = res==0; break;
case OP_Ne: res2 = res; break;
case OP_Lt: res2 = res<0; break;
case OP_Le: res2 = res<=0; break;
case OP_Gt: res2 = res>0; break;
default: res2 = res>=0; break;
|
> > > > > > > > > > < < < < < < < < > |
2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 |
}else{
/* Neither operand is NULL. Do a comparison. */
affinity = pOp->p5 & SQLITE_AFF_MASK;
if( affinity>=SQLITE_AFF_NUMERIC ){
if( (flags1 | flags3)&MEM_Str ){
if( (flags1 & (MEM_Int|MEM_Real|MEM_Str))==MEM_Str ){
applyNumericAffinity(pIn1,0);
testcase( flags3!=pIn3->flags ); /* Possible if pIn1==pIn3 */
flags3 = pIn3->flags;
}
if( (flags3 & (MEM_Int|MEM_Real|MEM_Str))==MEM_Str ){
applyNumericAffinity(pIn3,0);
}
}
/* Handle the common case of integer comparison here, as an
** optimization, to avoid a call to sqlite3MemCompare() */
if( (pIn1->flags & pIn3->flags & MEM_Int)!=0 ){
if( pIn3->u.i > pIn1->u.i ){ res = +1; goto compare_op; }
if( pIn3->u.i < pIn1->u.i ){ res = -1; goto compare_op; }
res = 0;
goto compare_op;
}
}else if( affinity==SQLITE_AFF_TEXT ){
if( (flags1 & MEM_Str)==0 && (flags1 & (MEM_Int|MEM_Real))!=0 ){
testcase( pIn1->flags & MEM_Int );
testcase( pIn1->flags & MEM_Real );
sqlite3VdbeMemStringify(pIn1, encoding, 1);
testcase( (flags1&MEM_Dyn) != (pIn1->flags&MEM_Dyn) );
flags1 = (pIn1->flags & ~MEM_TypeMask) | (flags1 & MEM_TypeMask);
testcase( flags3!=pIn3->flags ); /* Possible if pIn1==pIn3 */
flags3 = pIn3->flags;
}
if( (flags3 & MEM_Str)==0 && (flags3 & (MEM_Int|MEM_Real))!=0 ){
testcase( pIn3->flags & MEM_Int );
testcase( pIn3->flags & MEM_Real );
sqlite3VdbeMemStringify(pIn3, encoding, 1);
testcase( (flags3&MEM_Dyn) != (pIn3->flags&MEM_Dyn) );
flags3 = (pIn3->flags & ~MEM_TypeMask) | (flags3 & MEM_TypeMask);
}
}
assert( pOp->p4type==P4_COLLSEQ || pOp->p4.pColl==0 );
res = sqlite3MemCompare(pIn3, pIn1, pOp->p4.pColl);
}
compare_op:
switch( pOp->opcode ){
case OP_Eq: res2 = res==0; break;
case OP_Ne: res2 = res; break;
case OP_Lt: res2 = res<0; break;
case OP_Le: res2 = res<=0; break;
case OP_Gt: res2 = res>0; break;
default: res2 = res>=0; break;
|
Changes to src/vdbeaux.c.
3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 |
rc = pColl->xCmp(pColl->pUser, n1, v1, n2, v2);
if( (v1==0 || v2==0) && prcErr ) *prcErr = SQLITE_NOMEM_BKPT;
sqlite3VdbeMemRelease(&c1);
sqlite3VdbeMemRelease(&c2);
return rc;
}
}
/*
** Compare two blobs. Return negative, zero, or positive if the first
** is less than, equal to, or greater than the second, respectively.
** If one blob is a prefix of the other, then the shorter is the lessor.
*/
static SQLITE_NOINLINE int sqlite3BlobCompare(const Mem *pB1, const Mem *pB2){
int c = memcmp(pB1->z, pB2->z, pB1->n>pB2->n ? pB2->n : pB1->n);
if( c ) return c;
return pB1->n - pB2->n;
}
/*
** Do a comparison between a 64-bit signed integer and a 64-bit floating-point
** number. Return negative, zero, or positive if the first (i64) is less than,
** equal to, or greater than the second (double).
*/
|
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | | |
3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 |
rc = pColl->xCmp(pColl->pUser, n1, v1, n2, v2);
if( (v1==0 || v2==0) && prcErr ) *prcErr = SQLITE_NOMEM_BKPT;
sqlite3VdbeMemRelease(&c1);
sqlite3VdbeMemRelease(&c2);
return rc;
}
}
/*
** The input pBlob is guaranteed to be a Blob that is not marked
** with MEM_Zero. Return true if it could be a zero-blob.
*/
static int isZeroBlob(const Mem *pBlob){
int i;
for(i=0; i<pBlob->n && pBlob->z[i]==0; i++){}
return i==pBlob->n;
}
/*
** Compare two blobs. Return negative, zero, or positive if the first
** is less than, equal to, or greater than the second, respectively.
** If one blob is a prefix of the other, then the shorter is the lessor.
*/
static SQLITE_NOINLINE int sqlite3BlobCompare(const Mem *pB1, const Mem *pB2){
int c;
int n1 = pB1->n;
int n2 = pB2->n;
/* It is possible to have a Blob value that has some non-zero content
** followed by zero content. But that only comes up for Blobs formed
** by the OP_MakeRecord opcode, and such Blobs never get passed into
** sqlite3MemCompare(). */
assert( (pB1->flags & MEM_Zero)==0 || n1==0 );
assert( (pB2->flags & MEM_Zero)==0 || n2==0 );
if( (pB1->flags|pB2->flags) & MEM_Zero ){
if( pB1->flags & pB2->flags & MEM_Zero ){
return pB1->u.nZero - pB2->u.nZero;
}else if( pB1->flags & MEM_Zero ){
if( !isZeroBlob(pB2) ) return -1;
return pB1->u.nZero - n2;
}else{
if( !isZeroBlob(pB1) ) return +1;
return n1 - pB2->u.nZero;
}
}
c = memcmp(pB1->z, pB2->z, n1>n2 ? n2 : n1);
if( c ) return c;
return n1 - n2;
}
/*
** Do a comparison between a 64-bit signed integer and a 64-bit floating-point
** number. Return negative, zero, or positive if the first (i64) is less than,
** equal to, or greater than the second (double).
*/
|