SQLite

Check-in [a4ab5215fe]
Login

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

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
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: a4ab5215fed231c8e5f8714f5cadafd1209b362a
User & Date: drh 2009-10-12 20:01:50.000
Context
2009-10-12
22:30
Add asserts as evidence that all FK constraints are either immediate or deferred. (check-in: 634ef4fc9f 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: a4ab5215fe user: drh tags: trunk)
18:57
Add more test cases to e_fkey.test. (check-in: 5633cb2b5b user: dan tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/fkey.c.
791
792
793
794
795
796
797

798

799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
    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)))







>
|
>
|
|













|







791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
    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)))