Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | Omit the sqlite3IntTokens array constant for a code simplification. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
f907395ef5a2dc1d084b6a286af00de4 |
| User & Date: | drh 2019-09-23 12:38:10 |
Context
|
2019-09-24
| ||
| 20:20 | Bug fixes for window frames of the form (... RANGE BETWEEN b PRECEDING AND a PRECEDING) or (... RANGE a FOLLOWING AND b FOLLOWING) where (a > b). check-in: 040e196a user: dan tags: trunk | |
|
2019-09-23
| ||
| 12:38 | Omit the sqlite3IntTokens array constant for a code simplification. check-in: f907395e user: drh tags: trunk | |
| 11:55 | When a scalar subquery has a pre-existing "LIMIT X" then change it to "LIMIT X<>0" rather than just "LIMIT 1" so that if X is 0 the limit will still be zero. Ticket [99cd4807dc03f178]. Test cases in TH3. check-in: 82e5dcf5 user: drh tags: trunk | |
Changes
Changes to src/expr.c.
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
....
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
|
if( pLeft==0 ){
return pRight;
}else if( pRight==0 ){
return pLeft;
}else if( ExprAlwaysFalse(pLeft) || ExprAlwaysFalse(pRight) ){
sqlite3ExprUnmapAndDelete(pParse, pLeft);
sqlite3ExprUnmapAndDelete(pParse, pRight);
return sqlite3ExprAlloc(db, TK_INTEGER, &sqlite3IntTokens[0], 0);
}else{
return sqlite3PExpr(pParse, TK_AND, pLeft, pRight);
}
}
/*
** Construct a new expression node for a function with multiple
................................................................................
sqlite3VdbeAddOp2(v, OP_Integer, 0, dest.iSDParm);
VdbeComment((v, "Init EXISTS result"));
}
if( pSel->pLimit ){
/* The subquery already has a limit. If the pre-existing limit is X
** then make the new limit X<>0 so that the new limit is either 1 or 0 */
sqlite3 *db = pParse->db;
pLimit = sqlite3ExprAlloc(db, TK_INTEGER, &sqlite3IntTokens[0], 0);
if( pLimit ){
pLimit->affExpr = SQLITE_AFF_NUMERIC;
pLimit = sqlite3PExpr(pParse, TK_NE,
sqlite3ExprDup(db, pSel->pLimit->pLeft, 0), pLimit);
}
sqlite3ExprDelete(db, pSel->pLimit->pLeft);
pSel->pLimit->pLeft = pLimit;
}else{
/* If there is no pre-existing limit add a limit of 1 */
pLimit = sqlite3ExprAlloc(pParse->db, TK_INTEGER, &sqlite3IntTokens[1], 0);
pSel->pLimit = sqlite3PExpr(pParse, TK_LIMIT, pLimit, 0);
}
pSel->iLimit = 0;
if( sqlite3Select(pParse, pSel, &dest) ){
return 0;
}
pExpr->iTable = rReg = dest.iSDParm;
|
|
|
|
|
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
....
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
|
if( pLeft==0 ){
return pRight;
}else if( pRight==0 ){
return pLeft;
}else if( ExprAlwaysFalse(pLeft) || ExprAlwaysFalse(pRight) ){
sqlite3ExprUnmapAndDelete(pParse, pLeft);
sqlite3ExprUnmapAndDelete(pParse, pRight);
return sqlite3Expr(db, TK_INTEGER, "0");
}else{
return sqlite3PExpr(pParse, TK_AND, pLeft, pRight);
}
}
/*
** Construct a new expression node for a function with multiple
................................................................................
sqlite3VdbeAddOp2(v, OP_Integer, 0, dest.iSDParm);
VdbeComment((v, "Init EXISTS result"));
}
if( pSel->pLimit ){
/* The subquery already has a limit. If the pre-existing limit is X
** then make the new limit X<>0 so that the new limit is either 1 or 0 */
sqlite3 *db = pParse->db;
pLimit = sqlite3Expr(db, TK_INTEGER, "0");
if( pLimit ){
pLimit->affExpr = SQLITE_AFF_NUMERIC;
pLimit = sqlite3PExpr(pParse, TK_NE,
sqlite3ExprDup(db, pSel->pLimit->pLeft, 0), pLimit);
}
sqlite3ExprDelete(db, pSel->pLimit->pLeft);
pSel->pLimit->pLeft = pLimit;
}else{
/* If there is no pre-existing limit add a limit of 1 */
pLimit = sqlite3Expr(pParse->db, TK_INTEGER, "1");
pSel->pLimit = sqlite3PExpr(pParse, TK_LIMIT, pLimit, 0);
}
pSel->iLimit = 0;
if( sqlite3Select(pParse, pSel, &dest) ){
return 0;
}
pExpr->iTable = rReg = dest.iSDParm;
|
Changes to src/global.c.
267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 |
/* ** Hash table for global functions - functions common to all ** database connections. After initialization, this table is ** read-only. */ FuncDefHash sqlite3BuiltinFunctions; /* ** Constant tokens for values 0 and 1. */ const Token sqlite3IntTokens[] = { { "0", 1 }, { "1", 1 } }; #ifdef VDBE_PROFILE /* ** The following performance counter can be used in place of ** sqlite3Hwtime() for profiling. This is a no-op on standard builds. */ sqlite3_uint64 sqlite3NProfileCnt = 0; #endif |
< < < < < < < < |
267 268 269 270 271 272 273 274 275 276 277 278 279 280 |
/* ** Hash table for global functions - functions common to all ** database connections. After initialization, this table is ** read-only. */ FuncDefHash sqlite3BuiltinFunctions; #ifdef VDBE_PROFILE /* ** The following performance counter can be used in place of ** sqlite3Hwtime() for profiling. This is a no-op on standard builds. */ sqlite3_uint64 sqlite3NProfileCnt = 0; #endif |
Changes to src/parse.y.
1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 |
** expr1 IN ()
** expr1 NOT IN ()
**
** simplify to constants 0 (false) and 1 (true), respectively,
** regardless of the value of expr1.
*/
sqlite3ExprUnmapAndDelete(pParse, A);
A = sqlite3ExprAlloc(pParse->db, TK_INTEGER,&sqlite3IntTokens[N],1);
}else{
A = sqlite3PExpr(pParse, TK_IN, A, 0);
if( A ){
A->x.pList = Y;
sqlite3ExprSetHeightAndFlags(pParse, A);
}else{
sqlite3ExprListDelete(pParse->db, Y);
|
| |
1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 |
** expr1 IN ()
** expr1 NOT IN ()
**
** simplify to constants 0 (false) and 1 (true), respectively,
** regardless of the value of expr1.
*/
sqlite3ExprUnmapAndDelete(pParse, A);
A = sqlite3Expr(pParse->db, TK_INTEGER, N ? "1" : "0");
}else{
A = sqlite3PExpr(pParse, TK_IN, A, 0);
if( A ){
A->x.pList = Y;
sqlite3ExprSetHeightAndFlags(pParse, A);
}else{
sqlite3ExprListDelete(pParse->db, Y);
|
Changes to src/select.c.
5461 5462 5463 5464 5465 5466 5467 5468 5469 5470 5471 5472 5473 5474 5475 |
** within the HAVING expression with a constant "1".
*/
static int havingToWhereExprCb(Walker *pWalker, Expr *pExpr){
if( pExpr->op!=TK_AND ){
Select *pS = pWalker->u.pSelect;
if( sqlite3ExprIsConstantOrGroupBy(pWalker->pParse, pExpr, pS->pGroupBy) ){
sqlite3 *db = pWalker->pParse->db;
Expr *pNew = sqlite3ExprAlloc(db, TK_INTEGER, &sqlite3IntTokens[1], 0);
if( pNew ){
Expr *pWhere = pS->pWhere;
SWAP(Expr, *pNew, *pExpr);
pNew = sqlite3ExprAnd(pWalker->pParse, pWhere, pNew);
pS->pWhere = pNew;
pWalker->eCode = 1;
}
|
| |
5461 5462 5463 5464 5465 5466 5467 5468 5469 5470 5471 5472 5473 5474 5475 |
** within the HAVING expression with a constant "1".
*/
static int havingToWhereExprCb(Walker *pWalker, Expr *pExpr){
if( pExpr->op!=TK_AND ){
Select *pS = pWalker->u.pSelect;
if( sqlite3ExprIsConstantOrGroupBy(pWalker->pParse, pExpr, pS->pGroupBy) ){
sqlite3 *db = pWalker->pParse->db;
Expr *pNew = sqlite3Expr(db, TK_INTEGER, "1");
if( pNew ){
Expr *pWhere = pS->pWhere;
SWAP(Expr, *pNew, *pExpr);
pNew = sqlite3ExprAnd(pWalker->pParse, pWhere, pNew);
pS->pWhere = pNew;
pWalker->eCode = 1;
}
|
Changes to src/sqliteInt.h.
4314 4315 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 |
int sqlite3ValueFromExpr(sqlite3 *, Expr *, u8, u8, sqlite3_value **);
void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8);
#ifndef SQLITE_AMALGAMATION
extern const unsigned char sqlite3OpcodeProperty[];
extern const char sqlite3StrBINARY[];
extern const unsigned char sqlite3UpperToLower[];
extern const unsigned char sqlite3CtypeMap[];
extern const Token sqlite3IntTokens[];
extern SQLITE_WSD struct Sqlite3Config sqlite3Config;
extern FuncDefHash sqlite3BuiltinFunctions;
#ifndef SQLITE_OMIT_WSD
extern int sqlite3PendingByte;
#endif
#endif
#ifdef VDBE_PROFILE
|
< |
4314 4315 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 |
int sqlite3ValueFromExpr(sqlite3 *, Expr *, u8, u8, sqlite3_value **); void sqlite3ValueApplyAffinity(sqlite3_value *, u8, u8); #ifndef SQLITE_AMALGAMATION extern const unsigned char sqlite3OpcodeProperty[]; extern const char sqlite3StrBINARY[]; extern const unsigned char sqlite3UpperToLower[]; extern const unsigned char sqlite3CtypeMap[]; extern SQLITE_WSD struct Sqlite3Config sqlite3Config; extern FuncDefHash sqlite3BuiltinFunctions; #ifndef SQLITE_OMIT_WSD extern int sqlite3PendingByte; #endif #endif #ifdef VDBE_PROFILE |
Changes to src/window.c.
987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 |
** function accepts zero arguments, and there are no other columns
** selected (e.g. "SELECT row_number() OVER () FROM t1"), it is possible
** that pSublist is still NULL here. Add a constant expression here to
** keep everything legal in this case.
*/
if( pSublist==0 ){
pSublist = sqlite3ExprListAppend(pParse, 0,
sqlite3ExprAlloc(db, TK_INTEGER, &sqlite3IntTokens[0], 0)
);
}
pSub = sqlite3SelectNew(
pParse, pSublist, pSrc, pWhere, pGroupBy, pHaving, pSort, 0, 0
);
p->pSrc = sqlite3SrcListAppend(pParse, 0, 0, 0);
|
| |
987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 |
** function accepts zero arguments, and there are no other columns
** selected (e.g. "SELECT row_number() OVER () FROM t1"), it is possible
** that pSublist is still NULL here. Add a constant expression here to
** keep everything legal in this case.
*/
if( pSublist==0 ){
pSublist = sqlite3ExprListAppend(pParse, 0,
sqlite3Expr(db, TK_INTEGER, "0")
);
}
pSub = sqlite3SelectNew(
pParse, pSublist, pSrc, pWhere, pGroupBy, pHaving, pSort, 0, 0
);
p->pSrc = sqlite3SrcListAppend(pParse, 0, 0, 0);
|