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Overview
| Comment: | When processing FK constraints on changes to parent tables, make sure the names of child tables appear correctly in the output of EXPLAIN QUERY PLAN. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
a4ab5215fed231c8e5f8714f5cadafd1 |
| User & Date: | drh 2009-10-12 20:01:50 |
Context
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2009-10-12
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| 22:30 | Add asserts as evidence that all FK constraints are either immediate or deferred. check-in: 634ef4fc user: drh tags: trunk | |
| 20:01 | When processing FK constraints on changes to parent tables, make sure the names of child tables appear correctly in the output of EXPLAIN QUERY PLAN. check-in: a4ab5215 user: drh tags: trunk | |
| 18:57 | Add more test cases to e_fkey.test. check-in: 5633cb2b user: dan tags: trunk | |
Changes
Changes to src/fkey.c.
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assert( aiCol || pFKey->nCol==1 );
/* Create a SrcList structure containing a single table (the table
** the foreign key that refers to this table is attached to). This
** is required for the sqlite3WhereXXX() interface. */
pSrc = sqlite3SrcListAppend(db, 0, 0, 0);
if( pSrc ){
pSrc->a->pTab = pFKey->pFrom;
pSrc->a->pTab->nRef++;
pSrc->a->iCursor = pParse->nTab++;
if( regNew!=0 ){
fkScanChildren(pParse, pSrc, pTab, pIdx, pFKey, aiCol, regNew, -1);
}
if( regOld!=0 ){
/* If there is a RESTRICT action configured for the current operation
** on the parent table of this FK, then throw an exception
** immediately if the FK constraint is violated, even if this is a
** deferred trigger. That's what RESTRICT means. To defer checking
** the constraint, the FK should specify NO ACTION (represented
** using OE_None). NO ACTION is the default. */
fkScanChildren(pParse, pSrc, pTab, pIdx, pFKey, aiCol, regOld, 1);
}
sqlite3SrcListDelete(db, pSrc);
}
sqlite3DbFree(db, aiCol);
}
}
#define COLUMN_MASK(x) (((x)>31) ? 0xffffffff : ((u32)1<<(x)))
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> | > | | | |
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assert( aiCol || pFKey->nCol==1 );
/* Create a SrcList structure containing a single table (the table
** the foreign key that refers to this table is attached to). This
** is required for the sqlite3WhereXXX() interface. */
pSrc = sqlite3SrcListAppend(db, 0, 0, 0);
if( pSrc ){
struct SrcList_item *pItem = pSrc->a;
pItem->pTab = pFKey->pFrom;
pItem->zName = pFKey->pFrom->zName;
pItem->pTab->nRef++;
pItem->iCursor = pParse->nTab++;
if( regNew!=0 ){
fkScanChildren(pParse, pSrc, pTab, pIdx, pFKey, aiCol, regNew, -1);
}
if( regOld!=0 ){
/* If there is a RESTRICT action configured for the current operation
** on the parent table of this FK, then throw an exception
** immediately if the FK constraint is violated, even if this is a
** deferred trigger. That's what RESTRICT means. To defer checking
** the constraint, the FK should specify NO ACTION (represented
** using OE_None). NO ACTION is the default. */
fkScanChildren(pParse, pSrc, pTab, pIdx, pFKey, aiCol, regOld, 1);
}
pItem->zName = 0;
sqlite3SrcListDelete(db, pSrc);
}
sqlite3DbFree(db, aiCol);
}
}
#define COLUMN_MASK(x) (((x)>31) ? 0xffffffff : ((u32)1<<(x)))
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