SQLite

**     COPY
**     VACUUM
**     BEGIN TRANSACTION
**     COMMIT
**     ROLLBACK
**     PRAGMA
**
** $Id: build.c,v 1.101 2002/07/05 21:42:36 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** This routine is called when a new SQL statement is beginning to
** be parsed.  Check to see if the schema for the database needs

    if( isspace(c) ) continue;
    z[j++] = c;
  }
  z[j] = 0;
  pCol->sortOrder = SQLITE_SO_NUM;
  for(i=0; z[i]; i++){
    switch( z[i] ){
      case 'b':
      case 'B': {
        if( sqliteStrNICmp(&z[i],"blob",4)==0 ){
          pCol->sortOrder = SQLITE_SO_TEXT;
          return;
        }
        break;
      }
      case 'c':
      case 'C': {
        if( sqliteStrNICmp(&z[i],"char",4)==0 ||
                sqliteStrNICmp(&z[i],"clob",4)==0 ){
          pCol->sortOrder = SQLITE_SO_TEXT;
          return;
        }

  */
  if( !pParse->explain ){
    sqliteUnlinkAndDeleteTable(db, pTable);
    db->flags |= SQLITE_InternChanges;
  }
  sqliteViewResetAll(db);
}

/*
** This routine constructs a P3 string suitable for an OP_MakeIdxKey
** opcode and adds that P3 string to the most recently inserted instruction
** in the virtual machine.  The P3 string consists of a single character
** for each column in the index pIdx of table pTab.  If the column uses
** a numeric sort order, then the P3 string character corresponding to
** that column is 'n'.  If the column uses a text sort order, then the
** P3 string is 't'.  See the OP_MakeIdxKey opcode documentation for
** additional information.  See also the sqliteAddKeyType() routine.
*/
void sqliteAddIdxKeyType(Vdbe *v, Index *pIdx){
  char *zType;
  Table *pTab;
  int i, n;
  assert( pIdx!=0 && pIdx->pTable!=0 );
  pTab = pIdx->pTable;
  n = pIdx->nColumn;
  zType = sqliteMalloc( n+1 );
  if( zType==0 ) return;
  for(i=0; i<n; i++){
    int iCol = pIdx->aiColumn[i];
    assert( iCol>=0 && iCol<pTab->nCol );
    if( (pTab->aCol[iCol].sortOrder & SQLITE_SO_TYPEMASK)==SQLITE_SO_TEXT ){
      zType[i] = 't';
    }else{
      zType[i] = 'n';
    }
  }
  zType[n] = 0;
  sqliteVdbeChangeP3(v, -1, zType, n);
  sqliteFree(zType);
}

/*
** Create a new index for an SQL table.  pIndex is the name of the index 
** and pTable is the name of the table that is to be indexed.  Both will 
** be NULL for a primary key or an index that is created to satisfy a
** UNIQUE constraint.  If pTable and pIndex are NULL, use pParse->pNewTable
** as the table to be indexed.  pParse->pNewTable is a table that is

      lbl2 = sqliteVdbeMakeLabel(v);
      sqliteVdbeAddOp(v, OP_Rewind, 2, lbl2);
      lbl1 = sqliteVdbeAddOp(v, OP_Recno, 2, 0);
      for(i=0; i<pIndex->nColumn; i++){
        sqliteVdbeAddOp(v, OP_Column, 2, pIndex->aiColumn[i]);
      }
      sqliteVdbeAddOp(v, OP_MakeIdxKey, pIndex->nColumn, 0);
      if( db->file_format>=3 ) sqliteAddIdxKeyType(v, pIndex);
      sqliteVdbeAddOp(v, OP_IdxPut, 1, pIndex->onError!=OE_None);
      sqliteVdbeAddOp(v, OP_Next, 2, lbl1);
      sqliteVdbeResolveLabel(v, lbl2);
      sqliteVdbeAddOp(v, OP_Close, 2, 0);
      sqliteVdbeAddOp(v, OP_Close, 1, 0);
    }
    if( pTable!=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 DELETE FROM statements.
**
** $Id: delete.c,v 1.39 2002/07/05 21:42:37 drh Exp $
*/
#include "sqliteInt.h"


/*
** Given a table name, find the corresponding table and make sure the
** table is writeable.  Generate an error and return NULL if not.  If

    /* This is the beginning of the delete loop when there are no
    ** row triggers */
    if( !row_triggers_exist ){ 
      addr = sqliteVdbeAddOp(v, OP_ListRead, 0, end);
    }

    /* Delete the row */
    sqliteGenerateRowDelete(db, v, pTab, base, pParse->trigStack==0);

    /* If there are row triggers, close all cursors then invoke
    ** the AFTER triggers
    */
    if( row_triggers_exist ){
      for(i=1, pIdx=pTab->pIndex; pIdx; i++, pIdx=pIdx->pNext){
        sqliteVdbeAddOp(v, OP_Close, base + i, pIdx->tnum);

**       of the stack.
**
** This routine pops the top of the stack to remove the record number
** and then generates code to remove both the table record and all index
** entries that point to that record.
*/
void sqliteGenerateRowDelete(
  sqlite *db,        /* The database containing the index */
  Vdbe *v,           /* Generate code into this VDBE */
  Table *pTab,       /* Table containing the row to be deleted */
  int base,          /* Cursor number for the table */
  int count          /* Increment the row change counter */
){
  int addr;
  addr = sqliteVdbeAddOp(v, OP_NotExists, base, 0);
  sqliteGenerateRowIndexDelete(db, v, pTab, base, 0);
  sqliteVdbeAddOp(v, OP_Delete, base, count);
  sqliteVdbeChangeP2(v, addr, sqliteVdbeCurrentAddr(v));
}

/*
** This routine generates VDBE code that causes the deletion of all
** index entries associated with a single row of a single table.

**   2.  Read/write cursors for all indices of pTab must be open as
**       cursor number base+i for the i-th index.
**
**   3.  The "base" cursor must be pointing to the row that is to be
**       deleted.
*/
void sqliteGenerateRowIndexDelete(
  sqlite *db,        /* The database containing the index */
  Vdbe *v,           /* Generate code into this VDBE */
  Table *pTab,       /* Table containing the row to be deleted */
  int base,          /* Cursor number for the table */
  char *aIdxUsed     /* Only delete if aIdxUsed!=0 && aIdxUsed[i]!=0 */
){
  int i;
  Index *pIdx;

      if( idx==pTab->iPKey ){
        sqliteVdbeAddOp(v, OP_Dup, j, 0);
      }else{
        sqliteVdbeAddOp(v, OP_Column, base, idx);
      }
    }
    sqliteVdbeAddOp(v, OP_MakeIdxKey, pIdx->nColumn, 0);
    if( db->file_format>=3 ) sqliteAddIdxKeyType(v, pIdx);
    sqliteVdbeAddOp(v, OP_IdxDelete, base+i, 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 INSERT statements in SQLite.
**
** $Id: insert.c,v 1.63 2002/07/05 21:42:37 drh Exp $
*/
#include "sqliteInt.h"

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

      if( idx==pTab->iPKey ){
        sqliteVdbeAddOp(v, OP_Dup, i+extra+nCol+1, 1);
      }else{
        sqliteVdbeAddOp(v, OP_Dup, i+extra+nCol-idx, 1);
      }
    }
    jumpInst1 = sqliteVdbeAddOp(v, OP_MakeIdxKey, pIdx->nColumn, 0);
    if( pParse->db->file_format>=3 ) sqliteAddIdxKeyType(v, pIdx);
    onError = pIdx->onError;
    if( onError==OE_None ) continue;
    if( overrideError!=OE_Default ){
      onError = overrideError;
    }else if( onError==OE_Default ){
      onError = pParse->db->onError;
      if( onError==OE_Default ) onError = OE_Abort;

      case OE_Ignore: {
        assert( seenReplace==0 );
        sqliteVdbeAddOp(v, OP_Pop, nCol+extra+3+hasTwoRecnos, 0);
        sqliteVdbeAddOp(v, OP_Goto, 0, ignoreDest);
        break;
      }
      case OE_Replace: {
        sqliteGenerateRowDelete(pParse->db, v, pTab, base, 0);
        if( isUpdate ){
          sqliteVdbeAddOp(v, OP_Dup, nCol+extra+1+hasTwoRecnos, 1);
          sqliteVdbeAddOp(v, OP_MoveTo, base, 0);
        }
        seenReplace = 1;
        break;
      }

**
*************************************************************************
** This file contains SQLite's grammar for SQL.  Process this file
** using the lemon parser generator to generate C code that runs
** the parser.  Lemon will also generate a header file containing
** numeric codes for all of the tokens.
**
** @(#) $Id: parse.y,v 1.77 2002/07/05 21:42:37 drh Exp $
*/
%token_prefix TK_
%token_type {Token}
%default_type {Token}
%extra_argument {Parse *pParse}
%syntax_error {
  sqliteSetString(&pParse->zErrMsg,"syntax error",0);

orderby_opt(A) ::= .                          {A = 0;}
orderby_opt(A) ::= ORDER BY sortlist(X).      {A = X;}
sortlist(A) ::= sortlist(X) COMMA sortitem(Y) collate(C) sortorder(Z). {
  A = sqliteExprListAppend(X,Y,0);
  if( A ) A->a[A->nExpr-1].sortOrder = C+Z;
}
sortlist(A) ::= sortitem(Y) collate(C) sortorder(Z). {
  A = sqliteExprListAppend(0,Y,0);
  if( A ) A->a[0].sortOrder = C+Z;
}
sortitem(A) ::= expr(X).   {A = X;}

%type sortorder {int}
%type collate {int}

sortorder(A) ::= ASC.           {A = SQLITE_SO_ASC;}

**    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 SELECT statements in SQLite.
**
** $Id: select.c,v 1.103 2002/07/05 21:42:37 drh Exp $
*/
#include "sqliteInt.h"

/*
** Allocate a new Select structure and return a pointer to that
** structure.
*/

*/
static void pushOntoSorter(Parse *pParse, Vdbe *v, ExprList *pOrderBy){
  char *zSortOrder;
  int i;
  zSortOrder = sqliteMalloc( pOrderBy->nExpr + 1 );
  if( zSortOrder==0 ) return;
  for(i=0; i<pOrderBy->nExpr; i++){
    int order = pOrderBy->a[i].sortOrder;
    int type;
    int c;
    if( (order & SQLITE_SO_TYPEMASK)==SQLITE_SO_TEXT ){
      type = SQLITE_SO_TEXT;
    }else if( (order & SQLITE_SO_TYPEMASK)==SQLITE_SO_NUM ){
      type = SQLITE_SO_NUM;
    }else if( pParse->db->file_format>=3 ){
      type = sqliteExprType(pOrderBy->a[i].pExpr);
    }else{
      type = SQLITE_SO_NUM;
    }
    if( (order & SQLITE_SO_DIRMASK)==SQLITE_SO_ASC ){
      c = type==SQLITE_SO_TEXT ? 'A' : '+';
    }else{
      c = type==SQLITE_SO_TEXT ? 'D' : '-';
    }
    zSortOrder[i] = c;
    sqliteExprCode(pParse, pOrderBy->a[i].pExpr);
  }
  zSortOrder[pOrderBy->nExpr] = 0;
  sqliteVdbeAddOp(v, OP_SortMakeKey, pOrderBy->nExpr, 0);
  sqliteVdbeChangeP3(v, -1, zSortOrder, strlen(zSortOrder));
  sqliteFree(zSortOrder);
  sqliteVdbeAddOp(v, OP_SortPut, 0, 0);
}

/*
** This routine adds a P3 argument to the last VDBE opcode that was
** inserted. The P3 argument added is a string suitable for the 
** OP_MakeKey or OP_MakeIdxKey opcodes.  The string consists of
** characters 't' or 'n' depending on whether or not the various
** fields of the key to be generated should be treated as numeric
** or as text.  See the OP_MakeKey and OP_MakeIdxKey opcode
** documentation for additional information about the P3 string.
** See also the sqliteAddIdxKeyType() routine.
*/
void sqliteAddKeyType(Vdbe *v, ExprList *pEList){
  int nColumn = pEList->nExpr;
  char *zType = sqliteMalloc( nColumn+1 );
  int i;
  if( zType==0 ) return;
  for(i=0; i<nColumn; i++){
    zType[i] = sqliteExprType(pEList->a[i].pExpr)==SQLITE_SO_NUM ? 'n' : 't';
  }
  zType[i] = 0;
  sqliteVdbeChangeP3(v, -1, zType, nColumn);
  sqliteFree(zType);
}

/*
** This routine generates the code for the inside of the inner loop
** of a SELECT.
**
** If srcTab and nColumn are both zero, then the pEList expressions
** are evaluated in order to get the data for this row.  If nColumn>0
** then data is pulled from srcTab and pEList is used only to get the
** datatypes for each column.


*/
static int selectInnerLoop(
  Parse *pParse,          /* The parser context */
  Select *p,              /* The complete select statement being coded */
  ExprList *pEList,       /* List of values being extracted */
  int srcTab,             /* Pull data from this table */
  int nColumn,            /* Number of columns in the source table */
  ExprList *pOrderBy,     /* If not NULL, sort results using this key */
  int distinct,           /* If >=0, make sure results are distinct */
  int eDest,              /* How to dispose of the results */
  int iParm,              /* An argument to the disposal method */
  int iContinue,          /* Jump here to continue with next row */
  int iBreak              /* Jump here to break out of the inner loop */
){
  Vdbe *v = pParse->pVdbe;
  int i;

  if( v==0 ) return 0;
  assert( pEList!=0 );

  /* If there was a LIMIT clause on the SELECT statement, then do the check
  ** to see if this row should be output.
  */
  if( pOrderBy==0 ){
    if( p->nOffset>0 ){
      int addr = sqliteVdbeCurrentAddr(v);
      sqliteVdbeAddOp(v, OP_MemIncr, p->nOffset, addr+2);
      sqliteVdbeAddOp(v, OP_Goto, 0, iContinue);
    }
    if( p->nLimit>=0 ){
      sqliteVdbeAddOp(v, OP_MemIncr, p->nLimit, iBreak);
    }
  }

  /* Pull the requested columns.
  */
  if( nColumn>0 ){
    for(i=0; i<nColumn; i++){
      sqliteVdbeAddOp(v, OP_Column, srcTab, i);
    }
  }else{
    nColumn = pEList->nExpr;
    for(i=0; i<pEList->nExpr; i++){
      sqliteExprCode(pParse, pEList->a[i].pExpr);
    }





  }

  /* If the DISTINCT keyword was present on the SELECT statement
  ** and this row has been seen before, then do not make this row
  ** part of the result.
  */
  if( distinct>=0 && pEList && pEList->nExpr>0 ){
#if NULL_ALWAYS_DISTINCT
    sqliteVdbeAddOp(v, OP_IsNull, -pEList->nExpr, sqliteVdbeCurrentAddr(v)+7);
#endif
    sqliteVdbeAddOp(v, OP_MakeKey, pEList->nExpr, 1);
    if( pParse->db->file_format>=3 ) sqliteAddKeyType(v, pEList);
    sqliteVdbeAddOp(v, OP_Distinct, distinct, sqliteVdbeCurrentAddr(v)+3);
    sqliteVdbeAddOp(v, OP_Pop, pEList->nExpr+1, 0);
    sqliteVdbeAddOp(v, OP_Goto, 0, iContinue);
    sqliteVdbeAddOp(v, OP_String, 0, 0);
    sqliteVdbeAddOp(v, OP_PutStrKey, distinct, 0);
  }

        if( eDest==SRT_Callback ){
          generateColumnNames(pParse, p->base, 0, p->pEList);
        }
        iBreak = sqliteVdbeMakeLabel(v);
        iCont = sqliteVdbeMakeLabel(v);
        sqliteVdbeAddOp(v, OP_Rewind, unionTab, iBreak);
        iStart = sqliteVdbeCurrentAddr(v);
        rc = selectInnerLoop(pParse, p, p->pEList, unionTab, p->pEList->nExpr,
                             p->pOrderBy, -1, eDest, iParm, 
                             iCont, iBreak);
        if( rc ) return 1;
        sqliteVdbeResolveLabel(v, iCont);
        sqliteVdbeAddOp(v, OP_Next, unionTab, iStart);
        sqliteVdbeResolveLabel(v, iBreak);
        sqliteVdbeAddOp(v, OP_Close, unionTab, 0);

        generateColumnNames(pParse, p->base, 0, p->pEList);
      }
      iBreak = sqliteVdbeMakeLabel(v);
      iCont = sqliteVdbeMakeLabel(v);
      sqliteVdbeAddOp(v, OP_Rewind, tab1, iBreak);
      iStart = sqliteVdbeAddOp(v, OP_FullKey, tab1, 0);
      sqliteVdbeAddOp(v, OP_NotFound, tab2, iCont);
      rc = selectInnerLoop(pParse, p, p->pEList, tab1, p->pEList->nExpr,
                             p->pOrderBy, -1, eDest, iParm, 
                             iCont, iBreak);
      if( rc ) return 1;
      sqliteVdbeResolveLabel(v, iCont);
      sqliteVdbeAddOp(v, OP_Next, tab1, iStart);
      sqliteVdbeResolveLabel(v, iBreak);
      sqliteVdbeAddOp(v, OP_Close, tab2, 0);

    sqliteVdbeAddOp(v, OP_MoveTo, base, 0);
  }
  eList.nExpr = 1;
  memset(&eListItem, 0, sizeof(eListItem));
  eList.a = &eListItem;
  eList.a[0].pExpr = pExpr;
  cont = sqliteVdbeMakeLabel(v);
  selectInnerLoop(pParse, p, &eList, 0, 0, 0, -1, eDest, iParm, cont, cont);
  sqliteVdbeResolveLabel(v, cont);
  sqliteVdbeAddOp(v, OP_Close, base, 0);
  return 1;
}

/*
** Generate code for the given SELECT statement.

  else{
    if( pGroupBy ){
      int lbl1;
      for(i=0; i<pGroupBy->nExpr; i++){
        sqliteExprCode(pParse, pGroupBy->a[i].pExpr);
      }
      sqliteVdbeAddOp(v, OP_MakeKey, pGroupBy->nExpr, 0);
      if( pParse->db->file_format>=3 ) sqliteAddKeyType(v, pGroupBy);
      lbl1 = sqliteVdbeMakeLabel(v);
      sqliteVdbeAddOp(v, OP_AggFocus, 0, lbl1);
      for(i=0; i<pParse->nAgg; i++){
        if( pParse->aAgg[i].isAgg ) continue;
        sqliteExprCode(pParse, pParse->aAgg[i].pExpr);
        sqliteVdbeAddOp(v, OP_AggSet, 0, i);
      }

/*
** 2001 September 15
**
** 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.
**
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.134 2002/07/05 21:42:37 drh Exp $
*/
#include "sqlite.h"
#include "hash.h"
#include "vdbe.h"
#include "parse.h"
#include "btree.h"
#include <stdio.h>

int sqliteIdListIndex(IdList*,const char*);
SrcList *sqliteSrcListAppend(SrcList*, Token*);
void sqliteSrcListAddAlias(SrcList*, Token*);
void sqliteIdListDelete(IdList*);
void sqliteSrcListDelete(SrcList*);
void sqliteCreateIndex(Parse*, Token*, Token*, IdList*, int, Token*, Token*);
void sqliteDropIndex(Parse*, Token*);
void sqliteAddKeyType(Vdbe*, ExprList*);
void sqliteAddIdxKeyType(Vdbe*, Index*);
int sqliteSelect(Parse*, Select*, int, int, Select*, int, int*);
Select *sqliteSelectNew(ExprList*,SrcList*,Expr*,ExprList*,Expr*,ExprList*,
                        int,int,int);
void sqliteSelectDelete(Select*);
void sqliteSelectUnbind(Select*);
Table *sqliteTableNameToTable(Parse*, const char*);
SrcList *sqliteTableTokenToSrcList(Parse*, Token*);

void sqliteBeginTransaction(Parse*, int);
void sqliteCommitTransaction(Parse*);
void sqliteRollbackTransaction(Parse*);
char *sqlite_mprintf(const char *, ...);
int sqliteExprIsConstant(Expr*);
int sqliteExprIsInteger(Expr*, int*);
int sqliteIsRowid(const char*);
void sqliteGenerateRowDelete(sqlite*, Vdbe*, Table*, int, int);
void sqliteGenerateRowIndexDelete(sqlite*, Vdbe*, Table*, int, char*);
void sqliteGenerateConstraintChecks(Parse*,Table*,int,char*,int,int,int,int);
void sqliteCompleteInsertion(Parse*, Table*, int, char*, int, int);
void sqliteBeginWriteOperation(Parse*, int);
void sqliteEndWriteOperation(Parse*);
void sqliteExprMoveStrings(Expr*, int);
void sqliteExprListMoveStrings(ExprList*, int);
void sqliteSelectMoveStrings(Select*, int);

**    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 1.47 2002/07/05 21:42:37 drh Exp $
*/
#include "sqliteInt.h"

/*
** Process an UPDATE statement.
*/
void sqliteUpdate(

  /* Do constraint checks
  */
  sqliteGenerateConstraintChecks(pParse, pTab, base, aIdxUsed, chngRecno, 1,
                                 onError, addr);

  /* Delete the old indices for the current record.
  */
  sqliteGenerateRowIndexDelete(db, v, pTab, base, aIdxUsed);

  /* If changing the record number, delete the old record.
  */
  if( chngRecno ){
    sqliteVdbeAddOp(v, OP_Delete, base, 0);
  }

**
*************************************************************************
** Utility functions used throughout sqlite.
**
** This file contains functions for allocating memory, comparing
** strings, and stuff like that.
**
** $Id: util.c,v 1.47 2002/07/05 21:42:37 drh Exp $
*/
#include "sqliteInt.h"
#include <stdarg.h>
#include <ctype.h>

/*
** If malloc() ever fails, this global variable gets set to 1.

**
**            +one\000-two\000+three\000\000
**
** Both arguments will have the same number of strings.  This routine
** returns negative, zero, or positive if the first argument is less
** than, equal to, or greater than the first.  (Result is a-b).
**
** Each string begins with one of the characters "+", "-", "A", "D".
** This character determines the sort order and collating sequence:
**
**     +      Sort numerically in ascending order
**     -      Sort numerically in descending order
**     A      Sort as strings in ascending order
**     D      Sort as strings in descending order.
**
** For the "+" and "-" sorting, pure numeric strings (strings for which the
** isNum() function above returns TRUE) always compare less than strings
** that are not pure numerics.  Within non-numeric strings, substrings
** of digits compare in numerical order.  Finally, case is used only
** to break a tie.
**
** Note that the sort order imposed by the rules above is different
** from the ordering defined by the "<", "<=", ">", and ">=" operators
** of expressions.  The operators compare non-numeric strings in
** lexigraphical order.  This routine does the additional processing
** to sort substrings of digits into numerical order and to use case
** only as a tie-breaker.
**
** The special rules above apply only to numeric sorting, when the
** prefix is "+" or "-".  If the prefix is "A" or "D" then plain old
** "strcmp()" is used for the comparison.
*/
int sqliteSortCompare(const char *a, const char *b){
  int len;
  int res = 0;
  int isNumA, isNumB;

  while( res==0 && *a && *b ){
    assert( a[0]==b[0] );
    if( a[1]==0 ){
      res = -1;
      break;
    }else if( b[1]==0 ){
      res = +1;
      break;
    }
    if( a[0]=='A' || a[0]=='D' ){
      res = strcmp(&a[1],&b[1]);
      if( res ) break;
    }else{
      isNumA = sqliteIsNumber(&a[1]);
      isNumB = sqliteIsNumber(&b[1]);
      if( isNumA ){
        double rA, rB;
        if( !isNumB ){
          res = -1;
          break;
        }
        rA = atof(&a[1]);
        rB = atof(&b[1]);
        if( rA<rB ){
          res = -1;
          break;
        }
        if( rA>rB ){
          res = +1;
          break;
        }
      }else if( isNumB ){
        res = +1;
        break;
      }else{
        res = sortStrCmp(&a[1],&b[1],0);
        if( res==0 ){
          res = sortStrCmp(&a[1],&b[1],1);
        }
        if( res!=0 ){
          break;
        }
      }
    }
    len = strlen(&a[1]) + 2;
    a += len;
    b += len;
  }
  if( *a=='-' || *a=='D' ) res = -res;
  return res;
}

/*
** Some powers of 64.  These constants are needed in the
** sqliteRealToSortable() routine below.
*/

** type to the other occurs as necessary.
** 
** Most of the code in this file is taken up by the sqliteVdbeExec()
** function which does the work of interpreting a VDBE program.
** But other routines are also provided to help in building up
** a program instruction by instruction.
**
** $Id: vdbe.c,v 1.164 2002/07/05 21:42:37 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** The following global variable is incremented every time a cursor
** moves, either by the OP_MoveTo or the OP_Next opcode.  The test

** and the new key is pushed on top.  If P2 is zero, the original
** data is popped off the stack first then the new key is pushed
** back in its place.
**
** P3 is a string that is P1 characters long.  Each character is either
** an 'n' or a 't' to indicates if the argument should be numeric or
** text.  The first character corresponds to the lowest element on the
** stack.  If P3 is NULL then all arguments are assumed to be numeric.
**
** See also: MakeIdxKey, SortMakeKey
*/
/* Opcode: MakeIdxKey P1 P2 P3
**
** Convert the top P1 entries of the stack into a single entry suitable
** for use as the key in an index.  In addition, take one additional integer

** pushed on the stack.  In other words, jump to P2 if the key is
** guaranteed to be unique.  This jump can be used to skip a subsequent
** uniqueness test.
**
** P3 is a string that is P1 characters long.  Each character is either
** an 'n' or a 't' to indicates if the argument should be numeric or
** text.  The first character corresponds to the lowest element on the
** stack.  If P3 is null then all arguments are assumed to be numeric.
**
** See also:  MakeKey, SortMakeKey
*/
case OP_MakeIdxKey:
case OP_MakeKey: {
  char *zNewKey;
  int nByte;

# 2001 September 15
#
# 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.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file is testing the CREATE TABLE statement.
#
# $Id: table.test,v 1.18 2002/07/05 21:42:38 drh Exp $

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

# Create a basic table and verify it is added to sqlite_master
#
do_test table-1.1 {

    CREATE TABLE t6(a,b,c,
      FOREIGN KEY (b,c) REFERENCES t4(x,y) MATCH PARTIAL
        ON UPDATE SET NULL ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED
    );
  }
} {0 {}}

# Test for the "typeof" function.
#
do_test table-11.1 {
  execsql {
    CREATE TABLE t7(
       a integer primary key,
       b number(5,10),
       c character varying (8),
       d VARCHAR(9),
       e clob,
       f BLOB,
       g Text,
       h
    );
    INSERT INTO t7(a) VALUES(1);
    SELECT typeof(a), typeof(b), typeof(c), typeof(d),
           typeof(e), typeof(f), typeof(g), typeof(h)
    FROM t7 LIMIT 1;
  }
} {numeric numeric text text text text text numeric}
do_test table-11.2 {
  execsql {
    SELECT typeof(a+b), typeof(a||b), typeof(c+d), typeof(c||d)
    FROM t7 LIMIT 1;
  }
} {numeric text numeric text}

finish_test