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Further refinements of the index scanning speed logic.

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FossilOrigin-Name: e5d9371da92b4cc2c1df177cf40e0ced4d4c7421
This commit is contained in:
drh
2013-10-04 18:29:25 +00:00
parent 165674d8db
commit d3037a4123
5 changed files with 42 additions and 41 deletions
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29
src/analyze.c
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@@ -1259,7 +1259,6 @@ static void decodeIntArray(
int c;
int i;
tRowcnt v;
int v32;
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
if( z==0 ) z = "";
@@ -1276,23 +1275,19 @@ static void decodeIntArray(
if( *z==' ' ) z++;
}
if( pIndex ){
while( z[0] ){
for(i=1; z[i] && z[i]!=' '; i++){}
if( i==9 && memcmp(z, "unordered", 9)==0 ){
pIndex->bUnordered = 1;
}else if( i>2 && memcmp(z, "r=", 2)==0
&& sqlite3GetInt32(z+2, &v32) ){
if( v32>=200 ){
v32 = 255;
}else if( v32<0 ){
v32 = 0;
}else{
v32 = (128*v32)/100;
}
pIndex->iScanRatio = (u8)v32;
if( strcmp(z, "unordered")==0 ){
pIndex->bUnordered = 1;
}else if( sqlite3_strglob("r=[0-9]*", z)==0 ){
int v32 = 0;
sqlite3GetInt32(z+2, &v32);
if( v32>=200 ){
v32 = 255;
}else if( v32<=0 ){
v32 = 1;
}else{
v32 = (128*v32)/100;
}
z += i;
if( z[0]==' ' ) z++;
pIndex->iScanRatio = (u8)v32;
}
}
}