SQLite

**    May you share freely, never taking more than you give.
**
*************************************************************************
** This header file defines the interface that the sqlite B-Tree file
** subsystem.  See comments in the source code for a detailed description
** of what each interface routine does.
**
** @(#) $Id: btree.h,v 1.35 2003/06/01 01:10:33 drh Exp $
*/
#ifndef _BTREE_H_
#define _BTREE_H_

/*
** Forward declarations of structure
*/

/*
** The number of 4-byte "meta" values contained on the first page of each
** database file.
*/
#define SQLITE_N_BTREE_META 10

int sqliteBtreeOpen(const char *zFilename, int mode, int nPg, Btree **ppBtree);
int sqliteRbtreeOpen(const char *zFilename, int mode, int nPg, Btree **ppBtree);

#define btOps(pBt) (*((BtOps **)(pBt)))
#define btCOps(pCur) (*((BtCursorOps **)(pCur)))

#define sqliteBtreeClose(pBt)              (btOps(pBt)->Close(pBt))
#define sqliteBtreeSetCacheSize(pBt, sz)   (btOps(pBt)->SetCacheSize(pBt, sz))
#define sqliteBtreeSetSafetyLevel(pBt, sl) (btOps(pBt)->SetSafetyLevel(pBt, sl))

/*
** 2003 Feb 4
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btree_rb.c,v 1.11 2003/06/01 01:10:33 drh Exp $
**
** This file implements an in-core database using Red-Black balanced
** binary trees.
**
** It was contributed to SQLite by anonymous on 2003-Feb-04 23:24:49 UTC.
*/
#include "btree.h"

  }
}

int sqliteRbtreeOpen(
  const char *zFilename,
  int mode,
  int nPg,
  Btree **ppBtree
){
  Rbtree **ppRbtree = (Rbtree**)ppBtree;
  *ppRbtree = (Rbtree *)sqliteMalloc(sizeof(Rbtree));
  sqliteHashInit(&(*ppRbtree)->tblHash, SQLITE_HASH_INT, 0);

  /* Create a binary tree for the SQLITE_MASTER table at location 2 */
  btreeCreateTable(*ppRbtree, 2);
  (*ppRbtree)->next_idx = 3;
  (*ppRbtree)->pOps = &sqliteRbtreeOps;

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle INSERT statements in SQLite.
**
** $Id: insert.c,v 1.86 2003/06/01 01:10:33 drh Exp $
*/
#include "sqliteInt.h"

/*
** This routine is call to handle SQL of the following forms:
**
**    insert into TABLE (IDLIST) values(EXPRLIST)

          if( j==pTab->iPKey ){
            keyColumn = i;
          }
          break;
        }
      }
      if( j>=pTab->nCol ){
        if( sqliteIsRowid(pColumn->a[i].zName) ){
          keyColumn = i;
        }else{
          sqliteErrorMsg(pParse, "table %S has no column named %s",
              pTabList, 0, pColumn->a[i].zName);
          pParse->nErr++;
          goto insert_cleanup;
        }
      }
    }
  }

  /* If there is no IDLIST term but the table has an integer primary
  ** key, the set the keyColumn variable to the primary key column index
  ** in the original table definition.

        sqliteExprCode(pParse, pList->a[j].pExpr);
      }
    }

    /* Generate code to check constraints and generate index keys and
    ** do the insertion.
    */
    sqliteGenerateConstraintChecks(pParse, pTab, base, 0, keyColumn>=0,
                                   0, onError, endOfLoop);
    sqliteCompleteInsertion(pParse, pTab, base, 0,0,0,
                            after_triggers ? newIdx : -1);
  }

  /* Update the count of rows that are inserted
  */
  if( (db->flags & SQLITE_CountRows)!=0 ){

  assert( pTab->pSelect==0 );  /* This table is not a VIEW */
  nCol = pTab->nCol;

  /* Test all NOT NULL constraints.
  */
  for(i=0; i<nCol; i++){
    if( i==pTab->iPKey ){

      continue;
    }
    onError = pTab->aCol[i].notNull;
    if( onError==OE_None ) continue;
    if( overrideError!=OE_Default ){
      onError = overrideError;
    }else if( pParse->db->onError!=OE_Default ){

  /* If we have an INTEGER PRIMARY KEY, make sure the primary key
  ** of the new record does not previously exist.  Except, if this
  ** is an UPDATE and the primary key is not changing, that is OK.
  ** Also, if the conflict resolution policy is REPLACE, then we
  ** can skip this test.
  */
  if( /* (recnoChng || !isUpdate) && pTab->iPKey>=0 */ recnoChng ){
    onError = pTab->keyConf;
    if( overrideError!=OE_Default ){
      onError = overrideError;
    }else if( pParse->db->onError!=OE_Default ){
      onError = pParse->db->onError;
    }else if( onError==OE_Default ){
      onError = OE_Abort;
    }
    
    if( onError!=OE_Replace ){
      if( isUpdate ){
        sqliteVdbeAddOp(v, OP_Dup, nCol+1, 1);
        sqliteVdbeAddOp(v, OP_Dup, nCol+1, 1);
        jumpInst1 = sqliteVdbeAddOp(v, OP_Eq, 0, 0);
      }
      sqliteVdbeAddOp(v, OP_Dup, nCol, 1);
      jumpInst2 = sqliteVdbeAddOp(v, OP_NotExists, base, 0);
      switch( onError ){
        default: {
          onError = OE_Abort;
          /* Fall thru into the next case */
        }
        case OE_Rollback:
        case OE_Abort:
        case OE_Fail: {
          sqliteVdbeAddOp(v, OP_Halt, SQLITE_CONSTRAINT, onError);
          sqliteVdbeChangeP3(v, -1, "PRIMARY KEY must be unique", P3_STATIC);
          break;
        }
        case OE_Ignore: {
          sqliteVdbeAddOp(v, OP_Pop, nCol+1+hasTwoRecnos, 0);
          sqliteVdbeAddOp(v, OP_Goto, 0, ignoreDest);
          break;
        }

      }
      contAddr = sqliteVdbeCurrentAddr(v);
      sqliteVdbeChangeP2(v, jumpInst2, contAddr);
      if( isUpdate ){
        sqliteVdbeChangeP2(v, jumpInst1, contAddr);
        sqliteVdbeAddOp(v, OP_Dup, nCol+1, 1);
        sqliteVdbeAddOp(v, OP_MoveTo, base, 0);

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains C code routines that are called by the parser
** to handle UPDATE statements.
**
** $Id: update.c,v 1.67 2003/06/01 01:10:33 drh Exp $
*/
#include "sqliteInt.h"

/*
** Process an UPDATE statement.
**
**   UPDATE OR IGNORE table_wxyz SET a=b, c=d WHERE e<5 AND f NOT NULL;

          pRecnoExpr = pChanges->a[i].pExpr;
        }
        aXRef[j] = i;
        break;
      }
    }
    if( j>=pTab->nCol ){
      if( sqliteIsRowid(pChanges->a[i].zName) ){
        chngRecno = 1;
        pRecnoExpr = pChanges->a[i].pExpr;
      }else{
        sqliteErrorMsg(pParse, "no such column: %s", pChanges->a[i].zName);
        goto update_cleanup;
      }
    }
#ifndef SQLITE_OMIT_AUTHORIZATION
    {
      int rc;
      rc = sqliteAuthCheck(pParse, SQLITE_UPDATE, pTab->zName,
                           pTab->aCol[j].zName, db->aDb[pTab->iDb].zName);
      if( rc==SQLITE_DENY ){

#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file is testing the magic ROWID column that is
# found on all tables.
#
# $Id: rowid.test,v 1.11 2003/06/01 01:10:33 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

# Basic ROWID functionality tests.
#
do_test rowid-1.1 {

do_test rowid-1.9 {
  global x2rowid
  set v [execsql {SELECT x, _rowid_ FROM t1 order by x}]
  set v2 [list 1 $x2rowid(1) 3 $x2rowid(3)]
  expr {$v==$v2}
} {1}

# We can insert or update the ROWID column.
#
do_test rowid-2.1 {
  catchsql {
    INSERT INTO t1(rowid,x,y) VALUES(1234,5,6);

    SELECT rowid, * FROM t1;
  }
} {0 {1 1 2 2 3 4 1234 5 6}}
do_test rowid-2.2 {
  catchsql {
    UPDATE t1 SET rowid=12345 WHERE x==1;

    SELECT rowid, * FROM t1
  }
} {0 {2 3 4 1234 5 6 12345 1 2}}
do_test rowid-2.3 {
  catchsql {
    INSERT INTO t1(y,x,oid) VALUES(8,7,1235);


    SELECT rowid, * FROM t1 WHERE rowid>1000;
  }
} {0 {1234 5 6 1235 7 8 12345 1 2}}
do_test rowid-2.4 {
  catchsql {
    UPDATE t1 SET oid=12346 WHERE x==1;


    SELECT rowid, * FROM t1;
  }
} {0 {2 3 4 1234 5 6 1235 7 8 12346 1 2}}
do_test rowid-2.5 {
  catchsql {
    INSERT INTO t1(x,_rowid_,y) VALUES(9,1236,10);

    SELECT rowid, * FROM t1 WHERE rowid>1000;
  }
} {0 {1234 5 6 1235 7 8 1236 9 10 12346 1 2}}
do_test rowid-2.6 {
  catchsql {
    UPDATE t1 SET _rowid_=12347 WHERE x==1;

    SELECT rowid, * FROM t1 WHERE rowid>1000;
  }
} {0 {1234 5 6 1235 7 8 1236 9 10 12347 1 2}}

# But we can use ROWID in the WHERE clause of an UPDATE that does not
# change the ROWID.
#
do_test rowid-2.7 {
  global x2rowid
  set sql "UPDATE t1 SET x=2 WHERE OID==$x2rowid(3)"
  execsql $sql
  execsql {SELECT x FROM t1 ORDER BY x}
} {1 2 5 7 9}
do_test rowid-2.8 {
  global x2rowid
  set sql "UPDATE t1 SET x=3 WHERE _rowid_==$x2rowid(3)"
  execsql $sql
  execsql {SELECT x FROM t1 ORDER BY x}
} {1 3 5 7 9}

# We cannot index by ROWID
#
do_test rowid-2.9 {
  set v [catch {execsql {CREATE INDEX idxt1 ON t1(rowid)}} msg]
  lappend v $msg
} {1 {table t1 has no column named rowid}}