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Overview
| Comment: | Refactor With.a.zErr into With.a.zCteErr. No logic changes. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
58ba73630ecc4bc58b03a7962dd45b30 |
| User & Date: | drh 2015-08-26 11:40:11 |
Context
|
2015-08-26
| ||
| 14:01 | Evaluate expressions only once when the same expression is used in both the result set and in the ORDER BY clause. check-in: c2f3bbad user: drh tags: trunk | |
| 11:40 | Refactor With.a.zErr into With.a.zCteErr. No logic changes. check-in: 58ba7363 user: drh tags: trunk | |
| 11:34 | Update the TreeView output for compound SELECT statements so that all entries are shown vertically aligned rather than each successive entry being indented. check-in: 65a89187 user: drh tags: trunk | |
Changes
Changes to src/build.c.
4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 |
sqlite3SelectDelete(db, pQuery);
sqlite3DbFree(db, zName);
pNew = pWith;
}else{
pNew->a[pNew->nCte].pSelect = pQuery;
pNew->a[pNew->nCte].pCols = pArglist;
pNew->a[pNew->nCte].zName = zName;
pNew->a[pNew->nCte].zErr = 0;
pNew->nCte++;
}
return pNew;
}
/*
|
| |
4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 |
sqlite3SelectDelete(db, pQuery);
sqlite3DbFree(db, zName);
pNew = pWith;
}else{
pNew->a[pNew->nCte].pSelect = pQuery;
pNew->a[pNew->nCte].pCols = pArglist;
pNew->a[pNew->nCte].zName = zName;
pNew->a[pNew->nCte].zCteErr = 0;
pNew->nCte++;
}
return pNew;
}
/*
|
Changes to src/select.c.
4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 .... 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 .... 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 |
Table *pTab;
ExprList *pEList;
Select *pSel;
Select *pLeft; /* Left-most SELECT statement */
int bMayRecursive; /* True if compound joined by UNION [ALL] */
With *pSavedWith; /* Initial value of pParse->pWith */
/* If pCte->zErr is non-NULL at this point, then this is an illegal
** recursive reference to CTE pCte. Leave an error in pParse and return
** early. If pCte->zErr is NULL, then this is not a recursive reference.
** In this case, proceed. */
if( pCte->zErr ){
sqlite3ErrorMsg(pParse, pCte->zErr, pCte->zName);
return SQLITE_ERROR;
}
assert( pFrom->pTab==0 );
pFrom->pTab = pTab = sqlite3DbMallocZero(db, sizeof(Table));
if( pTab==0 ) return WRC_Abort;
pTab->nRef = 1;
................................................................................
sqlite3ErrorMsg(
pParse, "multiple references to recursive table: %s", pCte->zName
);
return SQLITE_ERROR;
}
assert( pTab->nRef==1 || ((pSel->selFlags&SF_Recursive) && pTab->nRef==2 ));
pCte->zErr = "circular reference: %s";
pSavedWith = pParse->pWith;
pParse->pWith = pWith;
sqlite3WalkSelect(pWalker, bMayRecursive ? pSel->pPrior : pSel);
for(pLeft=pSel; pLeft->pPrior; pLeft=pLeft->pPrior);
pEList = pLeft->pEList;
if( pCte->pCols ){
................................................................................
}
pEList = pCte->pCols;
}
sqlite3ColumnsFromExprList(pParse, pEList, &pTab->nCol, &pTab->aCol);
if( bMayRecursive ){
if( pSel->selFlags & SF_Recursive ){
pCte->zErr = "multiple recursive references: %s";
}else{
pCte->zErr = "recursive reference in a subquery: %s";
}
sqlite3WalkSelect(pWalker, pSel);
}
pCte->zErr = 0;
pParse->pWith = pSavedWith;
}
return SQLITE_OK;
}
#endif
|
| | | | | | | | |
4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 .... 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 .... 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 |
Table *pTab;
ExprList *pEList;
Select *pSel;
Select *pLeft; /* Left-most SELECT statement */
int bMayRecursive; /* True if compound joined by UNION [ALL] */
With *pSavedWith; /* Initial value of pParse->pWith */
/* If pCte->zCteErr is non-NULL at this point, then this is an illegal
** recursive reference to CTE pCte. Leave an error in pParse and return
** early. If pCte->zCteErr is NULL, then this is not a recursive reference.
** In this case, proceed. */
if( pCte->zCteErr ){
sqlite3ErrorMsg(pParse, pCte->zCteErr, pCte->zName);
return SQLITE_ERROR;
}
assert( pFrom->pTab==0 );
pFrom->pTab = pTab = sqlite3DbMallocZero(db, sizeof(Table));
if( pTab==0 ) return WRC_Abort;
pTab->nRef = 1;
................................................................................
sqlite3ErrorMsg(
pParse, "multiple references to recursive table: %s", pCte->zName
);
return SQLITE_ERROR;
}
assert( pTab->nRef==1 || ((pSel->selFlags&SF_Recursive) && pTab->nRef==2 ));
pCte->zCteErr = "circular reference: %s";
pSavedWith = pParse->pWith;
pParse->pWith = pWith;
sqlite3WalkSelect(pWalker, bMayRecursive ? pSel->pPrior : pSel);
for(pLeft=pSel; pLeft->pPrior; pLeft=pLeft->pPrior);
pEList = pLeft->pEList;
if( pCte->pCols ){
................................................................................
}
pEList = pCte->pCols;
}
sqlite3ColumnsFromExprList(pParse, pEList, &pTab->nCol, &pTab->aCol);
if( bMayRecursive ){
if( pSel->selFlags & SF_Recursive ){
pCte->zCteErr = "multiple recursive references: %s";
}else{
pCte->zCteErr = "recursive reference in a subquery: %s";
}
sqlite3WalkSelect(pWalker, pSel);
}
pCte->zCteErr = 0;
pParse->pWith = pSavedWith;
}
return SQLITE_OK;
}
#endif
|
Changes to src/sqliteInt.h.
3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 |
struct With {
int nCte; /* Number of CTEs in the WITH clause */
With *pOuter; /* Containing WITH clause, or NULL */
struct Cte { /* For each CTE in the WITH clause.... */
char *zName; /* Name of this CTE */
ExprList *pCols; /* List of explicit column names, or NULL */
Select *pSelect; /* The definition of this CTE */
const char *zErr; /* Error message for circular references */
} a[1];
};
#ifdef SQLITE_DEBUG
/*
** An instance of the TreeView object is used for printing the content of
** data structures on sqlite3DebugPrintf() using a tree-like view.
|
| |
3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 |
struct With {
int nCte; /* Number of CTEs in the WITH clause */
With *pOuter; /* Containing WITH clause, or NULL */
struct Cte { /* For each CTE in the WITH clause.... */
char *zName; /* Name of this CTE */
ExprList *pCols; /* List of explicit column names, or NULL */
Select *pSelect; /* The definition of this CTE */
const char *zCteErr; /* Error message for circular references */
} a[1];
};
#ifdef SQLITE_DEBUG
/*
** An instance of the TreeView object is used for printing the content of
** data structures on sqlite3DebugPrintf() using a tree-like view.
|