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Overview
| Comment: | Enhance the sqlite3VdbeMultiLoad() interface to automatically generate the OP_ResultRow opcode on PRAGMA implementations, for a small reduction in the library footprint. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
c46f0f076c674891e20240bad56693d8 |
| User & Date: | drh 2017-07-07 16:00:53 |
Context
|
2017-07-07
| ||
| 16:06 | Memory reallocation fix for the Win32 VFS for lsm1. check-in: 5a3140e4 user: mistachkin tags: trunk | |
| 16:00 | Enhance the sqlite3VdbeMultiLoad() interface to automatically generate the OP_ResultRow opcode on PRAGMA implementations, for a small reduction in the library footprint. check-in: c46f0f07 user: drh tags: trunk | |
| 13:59 | Exploit the fact that Expr.pRight and Expr.x are never used at the same time for a small performance gain. check-in: aacbb9a4 user: drh tags: trunk | |
Changes
Changes to src/pragma.c.
1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 .... 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 .... 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 .... 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 .... 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 .... 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 .... 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 .... 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 |
sqlite3VdbeMultiLoad(v, 1, "issisi",
i-nHidden,
pCol->zName,
sqlite3ColumnType(pCol,""),
pCol->notNull ? 1 : 0,
pCol->pDflt ? pCol->pDflt->u.zToken : 0,
k);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 6);
}
}
}
break;
#ifdef SQLITE_DEBUG
case PragTyp_STATS: {
................................................................................
Table *pTab = sqliteHashData(i);
sqlite3VdbeMultiLoad(v, 1, "ssiii",
pTab->zName,
0,
pTab->szTabRow,
pTab->nRowLogEst,
pTab->tabFlags);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 5);
for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
sqlite3VdbeMultiLoad(v, 2, "siii",
pIdx->zName,
pIdx->szIdxRow,
pIdx->aiRowLogEst[0],
pIdx->hasStat1);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 5);
}
}
................................................................................
pParse->nMem = 3;
}
pTab = pIdx->pTable;
sqlite3CodeVerifySchema(pParse, iDb);
assert( pParse->nMem<=pPragma->nPragCName );
for(i=0; i<mx; i++){
i16 cnum = pIdx->aiColumn[i];
sqlite3VdbeMultiLoad(v, 1, "iis", i, cnum,
cnum<0 ? 0 : pTab->aCol[cnum].zName);
if( pPragma->iArg ){
sqlite3VdbeMultiLoad(v, 4, "isi",
pIdx->aSortOrder[i],
pIdx->azColl[i],
i<pIdx->nKeyCol);
}
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, pParse->nMem);
}
}
................................................................................
const char *azOrigin[] = { "c", "u", "pk" };
sqlite3VdbeMultiLoad(v, 1, "isisi",
i,
pIdx->zName,
IsUniqueIndex(pIdx),
azOrigin[pIdx->idxType],
pIdx->pPartIdxWhere!=0);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 5);
}
}
}
break;
case PragTyp_DATABASE_LIST: {
int i;
................................................................................
for(i=0; i<db->nDb; i++){
if( db->aDb[i].pBt==0 ) continue;
assert( db->aDb[i].zDbSName!=0 );
sqlite3VdbeMultiLoad(v, 1, "iss",
i,
db->aDb[i].zDbSName,
sqlite3BtreeGetFilename(db->aDb[i].pBt));
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 3);
}
}
break;
case PragTyp_COLLATION_LIST: {
int i = 0;
HashElem *p;
pParse->nMem = 2;
for(p=sqliteHashFirst(&db->aCollSeq); p; p=sqliteHashNext(p)){
CollSeq *pColl = (CollSeq *)sqliteHashData(p);
sqlite3VdbeMultiLoad(v, 1, "is", i++, pColl->zName);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 2);
}
}
break;
#endif /* SQLITE_OMIT_SCHEMA_PRAGMAS */
#ifndef SQLITE_OMIT_FOREIGN_KEY
case PragTyp_FOREIGN_KEY_LIST: if( zRight ){
................................................................................
j,
pFK->zTo,
pTab->aCol[pFK->aCol[j].iFrom].zName,
pFK->aCol[j].zCol,
actionName(pFK->aAction[1]), /* ON UPDATE */
actionName(pFK->aAction[0]), /* ON DELETE */
"NONE");
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 8);
}
++i;
pFK = pFK->pNextFrom;
}
}
}
}
................................................................................
/* Generate code to report an FK violation to the caller. */
if( HasRowid(pTab) ){
sqlite3VdbeAddOp2(v, OP_Rowid, 0, regResult+1);
}else{
sqlite3VdbeAddOp2(v, OP_Null, 0, regResult+1);
}
sqlite3VdbeMultiLoad(v, regResult+2, "si", pFK->zTo, i-1);
sqlite3VdbeAddOp2(v, OP_ResultRow, regResult, 4);
sqlite3VdbeResolveLabel(v, addrOk);
sqlite3DbFree(db, aiCols);
}
sqlite3VdbeAddOp2(v, OP_Next, 0, addrTop+1); VdbeCoverage(v);
sqlite3VdbeJumpHere(v, addrTop);
}
................................................................................
if( pBt==0 || sqlite3BtreePager(pBt)==0 ){
zState = "closed";
}else if( sqlite3_file_control(db, i ? db->aDb[i].zDbSName : 0,
SQLITE_FCNTL_LOCKSTATE, &j)==SQLITE_OK ){
zState = azLockName[j];
}
sqlite3VdbeMultiLoad(v, 1, "ss", db->aDb[i].zDbSName, zState);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 2);
}
break;
}
#endif
#ifdef SQLITE_HAS_CODEC
case PragTyp_KEY: {
|
< < | | | < < < < | < |
1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 .... 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 .... 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 .... 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 .... 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 .... 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 .... 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 .... 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 |
sqlite3VdbeMultiLoad(v, 1, "issisi",
i-nHidden,
pCol->zName,
sqlite3ColumnType(pCol,""),
pCol->notNull ? 1 : 0,
pCol->pDflt ? pCol->pDflt->u.zToken : 0,
k);
}
}
}
break;
#ifdef SQLITE_DEBUG
case PragTyp_STATS: {
................................................................................
Table *pTab = sqliteHashData(i);
sqlite3VdbeMultiLoad(v, 1, "ssiii",
pTab->zName,
0,
pTab->szTabRow,
pTab->nRowLogEst,
pTab->tabFlags);
for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
sqlite3VdbeMultiLoad(v, 2, "siiiX",
pIdx->zName,
pIdx->szIdxRow,
pIdx->aiRowLogEst[0],
pIdx->hasStat1);
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 5);
}
}
................................................................................
pParse->nMem = 3;
}
pTab = pIdx->pTable;
sqlite3CodeVerifySchema(pParse, iDb);
assert( pParse->nMem<=pPragma->nPragCName );
for(i=0; i<mx; i++){
i16 cnum = pIdx->aiColumn[i];
sqlite3VdbeMultiLoad(v, 1, "iisX", i, cnum,
cnum<0 ? 0 : pTab->aCol[cnum].zName);
if( pPragma->iArg ){
sqlite3VdbeMultiLoad(v, 4, "isiX",
pIdx->aSortOrder[i],
pIdx->azColl[i],
i<pIdx->nKeyCol);
}
sqlite3VdbeAddOp2(v, OP_ResultRow, 1, pParse->nMem);
}
}
................................................................................
const char *azOrigin[] = { "c", "u", "pk" };
sqlite3VdbeMultiLoad(v, 1, "isisi",
i,
pIdx->zName,
IsUniqueIndex(pIdx),
azOrigin[pIdx->idxType],
pIdx->pPartIdxWhere!=0);
}
}
}
break;
case PragTyp_DATABASE_LIST: {
int i;
................................................................................
for(i=0; i<db->nDb; i++){
if( db->aDb[i].pBt==0 ) continue;
assert( db->aDb[i].zDbSName!=0 );
sqlite3VdbeMultiLoad(v, 1, "iss",
i,
db->aDb[i].zDbSName,
sqlite3BtreeGetFilename(db->aDb[i].pBt));
}
}
break;
case PragTyp_COLLATION_LIST: {
int i = 0;
HashElem *p;
pParse->nMem = 2;
for(p=sqliteHashFirst(&db->aCollSeq); p; p=sqliteHashNext(p)){
CollSeq *pColl = (CollSeq *)sqliteHashData(p);
sqlite3VdbeMultiLoad(v, 1, "is", i++, pColl->zName);
}
}
break;
#endif /* SQLITE_OMIT_SCHEMA_PRAGMAS */
#ifndef SQLITE_OMIT_FOREIGN_KEY
case PragTyp_FOREIGN_KEY_LIST: if( zRight ){
................................................................................
j,
pFK->zTo,
pTab->aCol[pFK->aCol[j].iFrom].zName,
pFK->aCol[j].zCol,
actionName(pFK->aAction[1]), /* ON UPDATE */
actionName(pFK->aAction[0]), /* ON DELETE */
"NONE");
}
++i;
pFK = pFK->pNextFrom;
}
}
}
}
................................................................................
/* Generate code to report an FK violation to the caller. */
if( HasRowid(pTab) ){
sqlite3VdbeAddOp2(v, OP_Rowid, 0, regResult+1);
}else{
sqlite3VdbeAddOp2(v, OP_Null, 0, regResult+1);
}
sqlite3VdbeMultiLoad(v, regResult+2, "siX", pFK->zTo, i-1);
sqlite3VdbeAddOp2(v, OP_ResultRow, regResult, 4);
sqlite3VdbeResolveLabel(v, addrOk);
sqlite3DbFree(db, aiCols);
}
sqlite3VdbeAddOp2(v, OP_Next, 0, addrTop+1); VdbeCoverage(v);
sqlite3VdbeJumpHere(v, addrTop);
}
................................................................................
if( pBt==0 || sqlite3BtreePager(pBt)==0 ){
zState = "closed";
}else if( sqlite3_file_control(db, i ? db->aDb[i].zDbSName : 0,
SQLITE_FCNTL_LOCKSTATE, &j)==SQLITE_OK ){
zState = azLockName[j];
}
sqlite3VdbeMultiLoad(v, 1, "ss", db->aDb[i].zDbSName, zState);
}
break;
}
#endif
#ifdef SQLITE_HAS_CODEC
case PragTyp_KEY: {
|
Changes to src/vdbeaux.c.
238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 |
/*
** Generate code that initializes multiple registers to string or integer
** constants. The registers begin with iDest and increase consecutively.
** One register is initialized for each characgter in zTypes[]. For each
** "s" character in zTypes[], the register is a string if the argument is
** not NULL, or OP_Null if the value is a null pointer. For each "i" character
** in zTypes[], the register is initialized to an integer.
*/
void sqlite3VdbeMultiLoad(Vdbe *p, int iDest, const char *zTypes, ...){
va_list ap;
int i;
char c;
va_start(ap, zTypes);
for(i=0; (c = zTypes[i])!=0; i++){
if( c=='s' ){
const char *z = va_arg(ap, const char*);
sqlite3VdbeAddOp4(p, z==0 ? OP_Null : OP_String8, 0, iDest++, 0, z, 0);
}else{
assert( c=='i' );
sqlite3VdbeAddOp2(p, OP_Integer, va_arg(ap, int), iDest++);
}
}
va_end(ap);
}
/*
** Add an opcode that includes the p4 value as a pointer.
*/
int sqlite3VdbeAddOp4(
|
> > > | < | | > > > > |
238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 |
/* ** Generate code that initializes multiple registers to string or integer ** constants. The registers begin with iDest and increase consecutively. ** One register is initialized for each characgter in zTypes[]. For each ** "s" character in zTypes[], the register is a string if the argument is ** not NULL, or OP_Null if the value is a null pointer. For each "i" character ** in zTypes[], the register is initialized to an integer. ** ** If the input string does not end with "X" then an OP_ResultRow instruction ** is generated for the values inserted. */ void sqlite3VdbeMultiLoad(Vdbe *p, int iDest, const char *zTypes, ...){ va_list ap; int i; char c; va_start(ap, zTypes); for(i=0; (c = zTypes[i])!=0; i++){ if( c=='s' ){ const char *z = va_arg(ap, const char*); sqlite3VdbeAddOp4(p, z==0 ? OP_Null : OP_String8, 0, iDest+i, 0, z, 0); }else if( c=='i' ){ sqlite3VdbeAddOp2(p, OP_Integer, va_arg(ap, int), iDest+i); }else{ goto skip_op_resultrow; } } sqlite3VdbeAddOp2(p, OP_ResultRow, iDest, i); skip_op_resultrow: va_end(ap); } /* ** Add an opcode that includes the p4 value as a pointer. */ int sqlite3VdbeAddOp4( |