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Overview
| Comment: | Change the "PRAGMA stats" command to report size values in LogEst units. The eliminates the need for sqlite3LogEstToInt() unless non-standard compile-time options are used, so leave it out except in those cases. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
832c237fcbe83dd4f5a18a06acb0aeb7 |
| User & Date: | drh 2016-02-25 21:19:03 |
Context
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2016-02-25
| ||
| 21:27 | Change the srcck1.c utility program to use only unsigned characters. check-in: d64d005e user: drh tags: trunk | |
| 21:19 | Change the "PRAGMA stats" command to report size values in LogEst units. The eliminates the need for sqlite3LogEstToInt() unless non-standard compile-time options are used, so leave it out except in those cases. check-in: 832c237f user: drh tags: trunk | |
| 20:17 | Disable the RESTRICT foreign key action if "PRAGMA defer_foreign_keys" is set. check-in: 9ffff484 user: dan tags: trunk | |
Changes
Changes to src/pragma.c.
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sqlite3CodeVerifySchema(pParse, iDb);
setAllColumnNames(v, 4, azCol); assert( 4==ArraySize(azCol) );
for(i=sqliteHashFirst(&pDb->pSchema->tblHash); i; i=sqliteHashNext(i)){
Table *pTab = sqliteHashData(i);
sqlite3VdbeMultiLoad(v, 1, "ssii",
pTab->zName,
0,
(int)sqlite3LogEstToInt(pTab->szTabRow),
(int)sqlite3LogEstToInt(pTab->nRowLogEst));
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 4);
for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
sqlite3VdbeMultiLoad(v, 2, "sii",
pIdx->zName,
(int)sqlite3LogEstToInt(pIdx->szIdxRow),
(int)sqlite3LogEstToInt(pIdx->aiRowLogEst[0]));
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 4);
}
}
}
break;
case PragTyp_INDEX_INFO: if( zRight ){
|
| | | | |
1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 |
sqlite3CodeVerifySchema(pParse, iDb);
setAllColumnNames(v, 4, azCol); assert( 4==ArraySize(azCol) );
for(i=sqliteHashFirst(&pDb->pSchema->tblHash); i; i=sqliteHashNext(i)){
Table *pTab = sqliteHashData(i);
sqlite3VdbeMultiLoad(v, 1, "ssii",
pTab->zName,
0,
pTab->szTabRow,
pTab->nRowLogEst);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 4);
for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
sqlite3VdbeMultiLoad(v, 2, "sii",
pIdx->zName,
pIdx->szIdxRow,
pIdx->aiRowLogEst[0]);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 4);
}
}
}
break;
case PragTyp_INDEX_INFO: if( zRight ){
|
Changes to src/sqliteInt.h.
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int sqlite3Utf8CharLen(const char *pData, int nByte); u32 sqlite3Utf8Read(const u8**); LogEst sqlite3LogEst(u64); LogEst sqlite3LogEstAdd(LogEst,LogEst); #ifndef SQLITE_OMIT_VIRTUALTABLE LogEst sqlite3LogEstFromDouble(double); #endif u64 sqlite3LogEstToInt(LogEst); /* ** Routines to read and write variable-length integers. These used to ** be defined locally, but now we use the varint routines in the util.c ** file. */ int sqlite3PutVarint(unsigned char*, u64); |
> > > > |
3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 |
int sqlite3Utf8CharLen(const char *pData, int nByte); u32 sqlite3Utf8Read(const u8**); LogEst sqlite3LogEst(u64); LogEst sqlite3LogEstAdd(LogEst,LogEst); #ifndef SQLITE_OMIT_VIRTUALTABLE LogEst sqlite3LogEstFromDouble(double); #endif #if defined(SQLITE_ENABLE_STMT_SCANSTAT) || \ defined(SQLITE_ENABLE_STAT3_OR_STAT4) || \ defined(SQLITE_EXPLAIN_ESTIMATED_ROWS) u64 sqlite3LogEstToInt(LogEst); #endif /* ** Routines to read and write variable-length integers. These used to ** be defined locally, but now we use the varint routines in the util.c ** file. */ int sqlite3PutVarint(unsigned char*, u64); |
Changes to src/util.c.
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if( x<=2000000000 ) return sqlite3LogEst((u64)x);
memcpy(&a, &x, 8);
e = (a>>52) - 1022;
return e*10;
}
#endif /* SQLITE_OMIT_VIRTUALTABLE */
/*
** Convert a LogEst into an integer.
*/
u64 sqlite3LogEstToInt(LogEst x){
u64 n;
if( x<10 ) return 1;
n = x%10;
x /= 10;
if( n>=5 ) n -= 2;
else if( n>=1 ) n -= 1;
if( x>=3 ){
return x>60 ? (u64)LARGEST_INT64 : (n+8)<<(x-3);
}
return (n+8)>>(3-x);
}
|
> > > > > > > |
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if( x<=2000000000 ) return sqlite3LogEst((u64)x); memcpy(&a, &x, 8); e = (a>>52) - 1022; return e*10; } #endif /* SQLITE_OMIT_VIRTUALTABLE */ #if defined(SQLITE_ENABLE_STMT_SCANSTAT) || \ defined(SQLITE_ENABLE_STAT3_OR_STAT4) || \ defined(SQLITE_EXPLAIN_ESTIMATED_ROWS) /* ** Convert a LogEst into an integer. ** ** Note that this routine is only used when one or more of various ** non-standard compile-time options is enabled. */ u64 sqlite3LogEstToInt(LogEst x){ u64 n; if( x<10 ) return 1; n = x%10; x /= 10; if( n>=5 ) n -= 2; else if( n>=1 ) n -= 1; if( x>=3 ){ return x>60 ? (u64)LARGEST_INT64 : (n+8)<<(x-3); } return (n+8)>>(3-x); } #endif /* defined SCANSTAT or STAT4 or ESTIMATED_ROWS */ |