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Overview
| Comment: | Change the name of SrcList.a[].zIndex to the more descriptive SrcList.a[0].zIndexedBy. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | 6a9cf063379118dbb95c6cdc6d60af50 |
| User & Date: | drh 2015-06-04 12:08:53 |
Context
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2015-06-05
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| 20:27 | Provide one final Select tree dump prior to WHERE clause analysis when ".selecttrace 0x400" tracing bit is set with SELECTTRACE_ENABLED. Analysis and debug changes only - normal builds are unaffected. check-in: 283bf0b6 user: drh tags: trunk | |
| 15:59 | Add a new opcode to the VDBE that gives the b-tree a hint about the set of columns in a table or index that are actually used by the query. Closed-Leaf check-in: f167bba4 user: drh tags: column-usage-hint | |
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2015-06-04
| ||
| 12:08 | Change the name of SrcList.a[].zIndex to the more descriptive SrcList.a[0].zIndexedBy. check-in: 6a9cf063 user: drh tags: trunk | |
|
2015-06-02
| ||
| 19:36 | Always check for cell overflow before returning a slot from the pageFindSlot routine in btree.c. check-in: 9f035c45 user: drh tags: trunk | |
Changes
Changes to src/build.c.
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int i;
struct SrcList_item *pItem;
if( pList==0 ) return;
for(pItem=pList->a, i=0; i<pList->nSrc; i++, pItem++){
sqlite3DbFree(db, pItem->zDatabase);
sqlite3DbFree(db, pItem->zName);
sqlite3DbFree(db, pItem->zAlias);
sqlite3DbFree(db, pItem->zIndex);
sqlite3DeleteTable(db, pItem->pTab);
sqlite3SelectDelete(db, pItem->pSelect);
sqlite3ExprDelete(db, pItem->pOn);
sqlite3IdListDelete(db, pItem->pUsing);
}
sqlite3DbFree(db, pList);
}
................................................................................
** Add an INDEXED BY or NOT INDEXED clause to the most recently added
** element of the source-list passed as the second argument.
*/
void sqlite3SrcListIndexedBy(Parse *pParse, SrcList *p, Token *pIndexedBy){
assert( pIndexedBy!=0 );
if( p && ALWAYS(p->nSrc>0) ){
struct SrcList_item *pItem = &p->a[p->nSrc-1];
assert( pItem->notIndexed==0 && pItem->zIndex==0 );
if( pIndexedBy->n==1 && !pIndexedBy->z ){
/* A "NOT INDEXED" clause was supplied. See parse.y
** construct "indexed_opt" for details. */
pItem->notIndexed = 1;
}else{
pItem->zIndex = sqlite3NameFromToken(pParse->db, pIndexedBy);
}
}
}
/*
** When building up a FROM clause in the parser, the join operator
** is initially attached to the left operand. But the code generator
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int i;
struct SrcList_item *pItem;
if( pList==0 ) return;
for(pItem=pList->a, i=0; i<pList->nSrc; i++, pItem++){
sqlite3DbFree(db, pItem->zDatabase);
sqlite3DbFree(db, pItem->zName);
sqlite3DbFree(db, pItem->zAlias);
sqlite3DbFree(db, pItem->zIndexedBy);
sqlite3DeleteTable(db, pItem->pTab);
sqlite3SelectDelete(db, pItem->pSelect);
sqlite3ExprDelete(db, pItem->pOn);
sqlite3IdListDelete(db, pItem->pUsing);
}
sqlite3DbFree(db, pList);
}
................................................................................
** Add an INDEXED BY or NOT INDEXED clause to the most recently added
** element of the source-list passed as the second argument.
*/
void sqlite3SrcListIndexedBy(Parse *pParse, SrcList *p, Token *pIndexedBy){
assert( pIndexedBy!=0 );
if( p && ALWAYS(p->nSrc>0) ){
struct SrcList_item *pItem = &p->a[p->nSrc-1];
assert( pItem->notIndexed==0 && pItem->zIndexedBy==0 );
if( pIndexedBy->n==1 && !pIndexedBy->z ){
/* A "NOT INDEXED" clause was supplied. See parse.y
** construct "indexed_opt" for details. */
pItem->notIndexed = 1;
}else{
pItem->zIndexedBy = sqlite3NameFromToken(pParse->db, pIndexedBy);
}
}
}
/*
** When building up a FROM clause in the parser, the join operator
** is initially attached to the left operand. But the code generator
|
Changes to src/expr.c.
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pNewItem->jointype = pOldItem->jointype;
pNewItem->iCursor = pOldItem->iCursor;
pNewItem->addrFillSub = pOldItem->addrFillSub;
pNewItem->regReturn = pOldItem->regReturn;
pNewItem->isCorrelated = pOldItem->isCorrelated;
pNewItem->viaCoroutine = pOldItem->viaCoroutine;
pNewItem->isRecursive = pOldItem->isRecursive;
pNewItem->zIndex = sqlite3DbStrDup(db, pOldItem->zIndex);
pNewItem->notIndexed = pOldItem->notIndexed;
pNewItem->pIndex = pOldItem->pIndex;
pTab = pNewItem->pTab = pOldItem->pTab;
if( pTab ){
pTab->nRef++;
}
pNewItem->pSelect = sqlite3SelectDup(db, pOldItem->pSelect, flags);
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pNewItem->jointype = pOldItem->jointype;
pNewItem->iCursor = pOldItem->iCursor;
pNewItem->addrFillSub = pOldItem->addrFillSub;
pNewItem->regReturn = pOldItem->regReturn;
pNewItem->isCorrelated = pOldItem->isCorrelated;
pNewItem->viaCoroutine = pOldItem->viaCoroutine;
pNewItem->isRecursive = pOldItem->isRecursive;
pNewItem->zIndexedBy = sqlite3DbStrDup(db, pOldItem->zIndexedBy);
pNewItem->notIndexed = pOldItem->notIndexed;
pNewItem->pIndex = pOldItem->pIndex;
pTab = pNewItem->pTab = pOldItem->pTab;
if( pTab ){
pTab->nRef++;
}
pNewItem->pSelect = sqlite3SelectDup(db, pOldItem->pSelect, flags);
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Changes to src/select.c.
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** If the source-list item passed as an argument was augmented with an
** INDEXED BY clause, then try to locate the specified index. If there
** was such a clause and the named index cannot be found, return
** SQLITE_ERROR and leave an error in pParse. Otherwise, populate
** pFrom->pIndex and return SQLITE_OK.
*/
int sqlite3IndexedByLookup(Parse *pParse, struct SrcList_item *pFrom){
if( pFrom->pTab && pFrom->zIndex ){
Table *pTab = pFrom->pTab;
char *zIndex = pFrom->zIndex;
Index *pIdx;
for(pIdx=pTab->pIndex;
pIdx && sqlite3StrICmp(pIdx->zName, zIndex);
pIdx=pIdx->pNext
);
if( !pIdx ){
sqlite3ErrorMsg(pParse, "no such index: %s", zIndex, 0);
pParse->checkSchema = 1;
return SQLITE_ERROR;
}
pFrom->pIndex = pIdx;
}
return SQLITE_OK;
}
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** If the source-list item passed as an argument was augmented with an
** INDEXED BY clause, then try to locate the specified index. If there
** was such a clause and the named index cannot be found, return
** SQLITE_ERROR and leave an error in pParse. Otherwise, populate
** pFrom->pIndex and return SQLITE_OK.
*/
int sqlite3IndexedByLookup(Parse *pParse, struct SrcList_item *pFrom){
if( pFrom->pTab && pFrom->zIndexedBy ){
Table *pTab = pFrom->pTab;
char *zIndexedBy = pFrom->zIndexedBy;
Index *pIdx;
for(pIdx=pTab->pIndex;
pIdx && sqlite3StrICmp(pIdx->zName, zIndexedBy);
pIdx=pIdx->pNext
);
if( !pIdx ){
sqlite3ErrorMsg(pParse, "no such index: %s", zIndexedBy, 0);
pParse->checkSchema = 1;
return SQLITE_ERROR;
}
pFrom->pIndex = pIdx;
}
return SQLITE_OK;
}
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Changes to src/sqliteInt.h.
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#ifndef SQLITE_OMIT_EXPLAIN
u8 iSelectId; /* If pSelect!=0, the id of the sub-select in EQP */
#endif
int iCursor; /* The VDBE cursor number used to access this table */
Expr *pOn; /* The ON clause of a join */
IdList *pUsing; /* The USING clause of a join */
Bitmask colUsed; /* Bit N (1<<N) set if column N of pTab is used */
char *zIndex; /* Identifier from "INDEXED BY <zIndex>" clause */
Index *pIndex; /* Index structure corresponding to zIndex, if any */
} a[1]; /* One entry for each identifier on the list */
};
/*
** Permitted values of the SrcList.a.jointype field
*/
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#ifndef SQLITE_OMIT_EXPLAIN
u8 iSelectId; /* If pSelect!=0, the id of the sub-select in EQP */
#endif
int iCursor; /* The VDBE cursor number used to access this table */
Expr *pOn; /* The ON clause of a join */
IdList *pUsing; /* The USING clause of a join */
Bitmask colUsed; /* Bit N (1<<N) set if column N of pTab is used */
char *zIndexedBy; /* Identifier from "INDEXED BY <zIndex>" clause */
Index *pIndex; /* Index structure corresponding to zIndex, if any */
} a[1]; /* One entry for each identifier on the list */
};
/*
** Permitted values of the SrcList.a.jointype field
*/
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Changes to src/where.c.
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pWInfo = pBuilder->pWInfo;
if( pWInfo->wctrlFlags & WHERE_FORCE_TABLE ) return 0;
assert( pWInfo->pTabList->nSrc>=1 );
pItem = pWInfo->pTabList->a;
pTab = pItem->pTab;
if( IsVirtual(pTab) ) return 0;
if( pItem->zIndex ) return 0;
iCur = pItem->iCursor;
pWC = &pWInfo->sWC;
pLoop = pBuilder->pNew;
pLoop->wsFlags = 0;
pLoop->nSkip = 0;
pTerm = findTerm(pWC, iCur, -1, 0, WO_EQ|WO_IS, 0);
if( pTerm ){
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pWInfo = pBuilder->pWInfo;
if( pWInfo->wctrlFlags & WHERE_FORCE_TABLE ) return 0;
assert( pWInfo->pTabList->nSrc>=1 );
pItem = pWInfo->pTabList->a;
pTab = pItem->pTab;
if( IsVirtual(pTab) ) return 0;
if( pItem->zIndexedBy ) return 0;
iCur = pItem->iCursor;
pWC = &pWInfo->sWC;
pLoop = pBuilder->pNew;
pLoop->wsFlags = 0;
pLoop->nSkip = 0;
pTerm = findTerm(pWC, iCur, -1, 0, WO_EQ|WO_IS, 0);
if( pTerm ){
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