database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-08-08 14:02:16 +03:00
Code Activity

Store values loaded from the stat1 table as logarithmic values in memory.

Browse Source 
FossilOrigin-Name: 1bd74c49ddab6f53bb6eaa57907eff44c2580dd6
This commit is contained in:
dan
2014-04-25 15:01:01 +00:00
parent aa9933c115
commit cfc9df76e1
8 changed files with 72 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
src/analyze.c
View File

@@ -1371,6 +1371,7 @@ static void decodeIntArray(
char *zIntArray, /* String containing int array to decode */
int nOut, /* Number of slots in aOut[] */
tRowcnt *aOut, /* Store integers here */
LogEst *aLog, /* Or, if aOut==0, here */
Index *pIndex /* Handle extra flags for this index, if not NULL */
){
char *z = zIntArray;
@@ -1389,7 +1390,11 @@ static void decodeIntArray(
v = v*10 + c - '0';
z++;
}
aOut[i] = v;
if( aOut ){
aOut[i] = v;
}else{
aLog[i] = sqlite3LogEst(v);
}
if( *z==' ' ) z++;
}
#ifndef SQLITE_ENABLE_STAT3_OR_STAT4
@@ -1445,12 +1450,12 @@ static int analysisLoader(void *pData, int argc, char **argv, char **NotUsed){
z = argv[2];
if( pIndex ){
decodeIntArray((char*)z, pIndex->nKeyCol+1, pIndex->aiRowEst, pIndex);
if( pIndex->pPartIdxWhere==0 ) pTable->nRowEst = pIndex->aiRowEst[0];
decodeIntArray((char*)z, pIndex->nKeyCol+1, 0, pIndex->aiRowLogEst, pIndex);
if( pIndex->pPartIdxWhere==0 ) pTable->nRowLogEst = pIndex->aiRowLogEst[0];
}else{
Index fakeIdx;
fakeIdx.szIdxRow = pTable->szTabRow;
decodeIntArray((char*)z, 1, &pTable->nRowEst, &fakeIdx);
decodeIntArray((char*)z, 1, 0, &pTable->nRowLogEst, &fakeIdx);
pTable->szTabRow = fakeIdx.szIdxRow;
}
@@ -1642,9 +1647,9 @@ static int loadStatTbl(
pPrevIdx = pIdx;
}
pSample = &pIdx->aSample[pIdx->nSample];
decodeIntArray((char*)sqlite3_column_text(pStmt,1), nCol, pSample->anEq, 0);
decodeIntArray((char*)sqlite3_column_text(pStmt,2), nCol, pSample->anLt, 0);
decodeIntArray((char*)sqlite3_column_text(pStmt,3), nCol, pSample->anDLt,0);
decodeIntArray((char*)sqlite3_column_text(pStmt,1),nCol,pSample->anEq,0,0);
decodeIntArray((char*)sqlite3_column_text(pStmt,2),nCol,pSample->anLt,0,0);
decodeIntArray((char*)sqlite3_column_text(pStmt,3),nCol,pSample->anDLt,0,0);
/* Take a copy of the sample. Add two 0x00 bytes the end of the buffer.
** This is in case the sample record is corrupted. In that case, the