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Overview
Comment:Fix for ticket #813. (CVS 1820)
Downloads: Tarball | ZIP archive
Timelines: family | ancestors | descendants | both | version_2
Files: files | file ages | folders
SHA1: 0cc612f8aa458034d3dc246861c529c57ac5b2b1
User & Date: drh 2004-07-19 19:30:50.000
Context
2004-07-19
23:33
Limit occurs after DISTINCT. Ticket #749. (CVS 1824) (check-in: db5ae13db3 user: drh tags: version_2)
19:30
Fix for ticket #813. (CVS 1820) (check-in: 0cc612f8aa user: drh tags: version_2)
02:24
Correctly handle joins of move than 32 tables. Ticket #806. (CVS 1813) (check-in: 5ba0acd6c7 user: drh tags: version_2)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/vdbe.c.
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**
** Various scripts scan this source file in order to generate HTML
** documentation, headers files, or other derived files.  The formatting
** of the code in this file is, therefore, important.  See other comments
** in this file for details.  If in doubt, do not deviate from existing
** commenting and indentation practices when changing or adding code.
**
** $Id: vdbe.c,v 1.268.2.2 2004/05/10 20:27:41 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>
#include "vdbeInt.h"

/*







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**
** Various scripts scan this source file in order to generate HTML
** documentation, headers files, or other derived files.  The formatting
** of the code in this file is, therefore, important.  See other comments
** in this file for details.  If in doubt, do not deviate from existing
** commenting and indentation practices when changing or adding code.
**
** $Id: vdbe.c,v 1.268.2.3 2004/07/19 19:30:50 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
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  if( pOp->opcode==OP_SetFirst ){
    pSet->prev = sqliteHashFirst(&pSet->hash);
    if( pSet->prev==0 ){
      pc = pOp->p2 - 1;
      break;
    }
  }else{
    assert( pSet->prev );
    pSet->prev = sqliteHashNext(pSet->prev);

    if( pSet->prev==0 ){
      break;
    }else{
      pc = pOp->p2 - 1;
    }
  }
  pTos++;







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  if( pOp->opcode==OP_SetFirst ){
    pSet->prev = sqliteHashFirst(&pSet->hash);
    if( pSet->prev==0 ){
      pc = pOp->p2 - 1;
      break;
    }
  }else{
    if( pSet->prev ){
      pSet->prev = sqliteHashNext(pSet->prev);
    }
    if( pSet->prev==0 ){
      break;
    }else{
      pc = pOp->p2 - 1;
    }
  }
  pTos++;
Changes to src/where.c.
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**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This module contains C code that generates VDBE code used to process
** the WHERE clause of SQL statements.
**
** $Id: where.c,v 1.89.2.1 2004/07/19 02:24:03 drh Exp $
*/
#include "sqliteInt.h"

/*
** The query generator uses an array of instances of this structure to
** help it analyze the subexpressions of the WHERE clause.  Each WHERE
** clause subexpression is separated from the others by an AND operator.







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**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This module contains C code that generates VDBE code used to process
** the WHERE clause of SQL statements.
**
** $Id: where.c,v 1.89.2.2 2004/07/19 19:30:50 drh Exp $
*/
#include "sqliteInt.h"

/*
** The query generator uses an array of instances of this structure to
** help it analyze the subexpressions of the WHERE clause.  Each WHERE
** clause subexpression is separated from the others by an AND operator.
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    }
  }
  if( pMatch && pbRev ){
    *pbRev = sortOrder==SQLITE_SO_DESC;
  }
  return pMatch;
}






























/*
** Generate the beginning of the loop used for WHERE clause processing.
** The return value is a pointer to an (opaque) structure that contains
** information needed to terminate the loop.  Later, the calling routine
** should invoke sqliteWhereEnd() with the return value of this function
** in order to complete the WHERE clause processing.







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    }
  }
  if( pMatch && pbRev ){
    *pbRev = sortOrder==SQLITE_SO_DESC;
  }
  return pMatch;
}

/*
** Disable a term in the WHERE clause.  Except, do not disable the term
** if it controls a LEFT OUTER JOIN and it did not originate in the ON
** or USING clause of that join.
**
** Consider the term t2.z='ok' in the following queries:
**
**   (1)  SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.x WHERE t2.z='ok'
**   (2)  SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.x AND t2.z='ok'
**   (3)  SELECT * FROM t1, t2 WHERE t1.a=t2.x AND t2.z='ok'
**
** The t2.z='ok' is disabled in the in (2) because it did not originate
** in the ON clause.  The term is disabled in (3) because it is not part
** of a LEFT OUTER JOIN.  In (1), the term is not disabled.
**
** Disabling a term causes that term to not be tested in the inner loop
** of the join.  Disabling is an optimization.  We would get the correct
** results if nothing were ever disabled, but joins might run a little
** slower.  The trick is to disable as much as we can without disabling
** too much.  If we disabled in (1), we'd get the wrong answer.
** See ticket #813.
*/
static void disableTerm(WhereLevel *pLevel, Expr **ppExpr){
  Expr *pExpr = *ppExpr;
  if( pLevel->iLeftJoin==0 || ExprHasProperty(pExpr, EP_FromJoin) ){
    *ppExpr = 0;
  }
}

/*
** Generate the beginning of the loop used for WHERE clause processing.
** The return value is a pointer to an (opaque) structure that contains
** information needed to terminate the loop.  Later, the calling routine
** should invoke sqliteWhereEnd() with the return value of this function
** in order to complete the WHERE clause processing.
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          pLevel->inP2 = sqliteVdbeAddOp(v, OP_FullKey, pX->iTable, 0);
          pLevel->inOp = OP_Next;
          pLevel->inP1 = pX->iTable;
        }
      }else{
        sqliteExprCode(pParse, aExpr[k].p->pLeft);
      }
      aExpr[k].p = 0;
      cont = pLevel->cont = sqliteVdbeMakeLabel(v);
      sqliteVdbeAddOp(v, OP_MustBeInt, 1, brk);
      haveKey = 0;
      sqliteVdbeAddOp(v, OP_NotExists, iCur, brk);
      pLevel->op = OP_Noop;
    }else if( pIdx!=0 && pLevel->score>0 && pLevel->score%4==0 ){
      /* Case 2:  There is an index and all terms of the WHERE clause that







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          pLevel->inP2 = sqliteVdbeAddOp(v, OP_FullKey, pX->iTable, 0);
          pLevel->inOp = OP_Next;
          pLevel->inP1 = pX->iTable;
        }
      }else{
        sqliteExprCode(pParse, aExpr[k].p->pLeft);
      }
      disableTerm(pLevel, &aExpr[k].p);
      cont = pLevel->cont = sqliteVdbeMakeLabel(v);
      sqliteVdbeAddOp(v, OP_MustBeInt, 1, brk);
      haveKey = 0;
      sqliteVdbeAddOp(v, OP_NotExists, iCur, brk);
      pLevel->op = OP_Noop;
    }else if( pIdx!=0 && pLevel->score>0 && pLevel->score%4==0 ){
      /* Case 2:  There is an index and all terms of the WHERE clause that
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          if( pX==0 ) continue;
          if( aExpr[k].idxLeft==iCur
             && (aExpr[k].prereqRight & loopMask)==aExpr[k].prereqRight 
             && pX->pLeft->iColumn==pIdx->aiColumn[j]
          ){
            if( pX->op==TK_EQ ){
              sqliteExprCode(pParse, pX->pRight);
              aExpr[k].p = 0;
              break;
            }
            if( pX->op==TK_IN && nColumn==1 ){
              if( pX->pList ){
                sqliteVdbeAddOp(v, OP_SetFirst, pX->iTable, brk);
                pLevel->inOp = OP_SetNext;
                pLevel->inP1 = pX->iTable;
                pLevel->inP2 = sqliteVdbeCurrentAddr(v);
              }else{
                assert( pX->pSelect );
                sqliteVdbeAddOp(v, OP_Rewind, pX->iTable, brk);
                sqliteVdbeAddOp(v, OP_KeyAsData, pX->iTable, 1);
                pLevel->inP2 = sqliteVdbeAddOp(v, OP_FullKey, pX->iTable, 0);
                pLevel->inOp = OP_Next;
                pLevel->inP1 = pX->iTable;
              }
              aExpr[k].p = 0;
              break;
            }
          }
          if( aExpr[k].idxRight==iCur
             && aExpr[k].p->op==TK_EQ
             && (aExpr[k].prereqLeft & loopMask)==aExpr[k].prereqLeft
             && aExpr[k].p->pRight->iColumn==pIdx->aiColumn[j]
          ){
            sqliteExprCode(pParse, aExpr[k].p->pLeft);
            aExpr[k].p = 0;
            break;
          }
        }
      }
      pLevel->iMem = pParse->nMem++;
      cont = pLevel->cont = sqliteVdbeMakeLabel(v);
      sqliteVdbeAddOp(v, OP_NotNull, -nColumn, sqliteVdbeCurrentAddr(v)+3);







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          if( pX==0 ) continue;
          if( aExpr[k].idxLeft==iCur
             && (aExpr[k].prereqRight & loopMask)==aExpr[k].prereqRight 
             && pX->pLeft->iColumn==pIdx->aiColumn[j]
          ){
            if( pX->op==TK_EQ ){
              sqliteExprCode(pParse, pX->pRight);
              disableTerm(pLevel, &aExpr[k].p);
              break;
            }
            if( pX->op==TK_IN && nColumn==1 ){
              if( pX->pList ){
                sqliteVdbeAddOp(v, OP_SetFirst, pX->iTable, brk);
                pLevel->inOp = OP_SetNext;
                pLevel->inP1 = pX->iTable;
                pLevel->inP2 = sqliteVdbeCurrentAddr(v);
              }else{
                assert( pX->pSelect );
                sqliteVdbeAddOp(v, OP_Rewind, pX->iTable, brk);
                sqliteVdbeAddOp(v, OP_KeyAsData, pX->iTable, 1);
                pLevel->inP2 = sqliteVdbeAddOp(v, OP_FullKey, pX->iTable, 0);
                pLevel->inOp = OP_Next;
                pLevel->inP1 = pX->iTable;
              }
              disableTerm(pLevel, &aExpr[k].p);
              break;
            }
          }
          if( aExpr[k].idxRight==iCur
             && aExpr[k].p->op==TK_EQ
             && (aExpr[k].prereqLeft & loopMask)==aExpr[k].prereqLeft
             && aExpr[k].p->pRight->iColumn==pIdx->aiColumn[j]
          ){
            sqliteExprCode(pParse, aExpr[k].p->pLeft);
            disableTerm(pLevel, &aExpr[k].p);
            break;
          }
        }
      }
      pLevel->iMem = pParse->nMem++;
      cont = pLevel->cont = sqliteVdbeMakeLabel(v);
      sqliteVdbeAddOp(v, OP_NotNull, -nColumn, sqliteVdbeCurrentAddr(v)+3);
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          sqliteExprCode(pParse, aExpr[k].p->pRight);
        }else{
          sqliteExprCode(pParse, aExpr[k].p->pLeft);
        }
        sqliteVdbeAddOp(v, OP_ForceInt,
          aExpr[k].p->op==TK_LT || aExpr[k].p->op==TK_GT, brk);
        sqliteVdbeAddOp(v, OP_MoveTo, iCur, brk);
        aExpr[k].p = 0;
      }else{
        sqliteVdbeAddOp(v, OP_Rewind, iCur, brk);
      }
      if( iDirectLt[i]>=0 ){
        k = iDirectLt[i];
        assert( k<nExpr );
        assert( aExpr[k].p!=0 );







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          sqliteExprCode(pParse, aExpr[k].p->pRight);
        }else{
          sqliteExprCode(pParse, aExpr[k].p->pLeft);
        }
        sqliteVdbeAddOp(v, OP_ForceInt,
          aExpr[k].p->op==TK_LT || aExpr[k].p->op==TK_GT, brk);
        sqliteVdbeAddOp(v, OP_MoveTo, iCur, brk);
        disableTerm(pLevel, &aExpr[k].p);
      }else{
        sqliteVdbeAddOp(v, OP_Rewind, iCur, brk);
      }
      if( iDirectLt[i]>=0 ){
        k = iDirectLt[i];
        assert( k<nExpr );
        assert( aExpr[k].p!=0 );
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        pLevel->iMem = pParse->nMem++;
        sqliteVdbeAddOp(v, OP_MemStore, pLevel->iMem, 1);
        if( aExpr[k].p->op==TK_LT || aExpr[k].p->op==TK_GT ){
          testOp = OP_Ge;
        }else{
          testOp = OP_Gt;
        }
        aExpr[k].p = 0;
      }
      start = sqliteVdbeCurrentAddr(v);
      pLevel->op = OP_Next;
      pLevel->p1 = iCur;
      pLevel->p2 = start;
      if( testOp!=OP_Noop ){
        sqliteVdbeAddOp(v, OP_Recno, iCur, 0);







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        pLevel->iMem = pParse->nMem++;
        sqliteVdbeAddOp(v, OP_MemStore, pLevel->iMem, 1);
        if( aExpr[k].p->op==TK_LT || aExpr[k].p->op==TK_GT ){
          testOp = OP_Ge;
        }else{
          testOp = OP_Gt;
        }
        disableTerm(pLevel, &aExpr[k].p);
      }
      start = sqliteVdbeCurrentAddr(v);
      pLevel->op = OP_Next;
      pLevel->p1 = iCur;
      pLevel->p2 = start;
      if( testOp!=OP_Noop ){
        sqliteVdbeAddOp(v, OP_Recno, iCur, 0);
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          if( aExpr[k].p==0 ) continue;
          if( aExpr[k].idxLeft==iCur
             && aExpr[k].p->op==TK_EQ
             && (aExpr[k].prereqRight & loopMask)==aExpr[k].prereqRight 
             && aExpr[k].p->pLeft->iColumn==pIdx->aiColumn[j]
          ){
            sqliteExprCode(pParse, aExpr[k].p->pRight);
            aExpr[k].p = 0;
            break;
          }
          if( aExpr[k].idxRight==iCur
             && aExpr[k].p->op==TK_EQ
             && (aExpr[k].prereqLeft & loopMask)==aExpr[k].prereqLeft
             && aExpr[k].p->pRight->iColumn==pIdx->aiColumn[j]
          ){
            sqliteExprCode(pParse, aExpr[k].p->pLeft);
            aExpr[k].p = 0;
            break;
          }
        }
      }

      /* Duplicate the equality term values because they will all be
      ** used twice: once to make the termination key and once to make the







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          if( aExpr[k].p==0 ) continue;
          if( aExpr[k].idxLeft==iCur
             && aExpr[k].p->op==TK_EQ
             && (aExpr[k].prereqRight & loopMask)==aExpr[k].prereqRight 
             && aExpr[k].p->pLeft->iColumn==pIdx->aiColumn[j]
          ){
            sqliteExprCode(pParse, aExpr[k].p->pRight);
            disableTerm(pLevel, &aExpr[k].p);
            break;
          }
          if( aExpr[k].idxRight==iCur
             && aExpr[k].p->op==TK_EQ
             && (aExpr[k].prereqLeft & loopMask)==aExpr[k].prereqLeft
             && aExpr[k].p->pRight->iColumn==pIdx->aiColumn[j]
          ){
            sqliteExprCode(pParse, aExpr[k].p->pLeft);
            disableTerm(pLevel, &aExpr[k].p);
            break;
          }
        }
      }

      /* Duplicate the equality term values because they will all be
      ** used twice: once to make the termination key and once to make the
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          if( aExpr[k].idxLeft==iCur
             && (pExpr->op==TK_LT || pExpr->op==TK_LE)
             && (aExpr[k].prereqRight & loopMask)==aExpr[k].prereqRight 
             && pExpr->pLeft->iColumn==pIdx->aiColumn[j]
          ){
            sqliteExprCode(pParse, pExpr->pRight);
            leFlag = pExpr->op==TK_LE;
            aExpr[k].p = 0;
            break;
          }
          if( aExpr[k].idxRight==iCur
             && (pExpr->op==TK_GT || pExpr->op==TK_GE)
             && (aExpr[k].prereqLeft & loopMask)==aExpr[k].prereqLeft
             && pExpr->pRight->iColumn==pIdx->aiColumn[j]
          ){
            sqliteExprCode(pParse, pExpr->pLeft);
            leFlag = pExpr->op==TK_GE;
            aExpr[k].p = 0;
            break;
          }
        }
        testOp = OP_IdxGE;
      }else{
        testOp = nEqColumn>0 ? OP_IdxGE : OP_Noop;
        leFlag = 1;







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          if( aExpr[k].idxLeft==iCur
             && (pExpr->op==TK_LT || pExpr->op==TK_LE)
             && (aExpr[k].prereqRight & loopMask)==aExpr[k].prereqRight 
             && pExpr->pLeft->iColumn==pIdx->aiColumn[j]
          ){
            sqliteExprCode(pParse, pExpr->pRight);
            leFlag = pExpr->op==TK_LE;
            disableTerm(pLevel, &aExpr[k].p);
            break;
          }
          if( aExpr[k].idxRight==iCur
             && (pExpr->op==TK_GT || pExpr->op==TK_GE)
             && (aExpr[k].prereqLeft & loopMask)==aExpr[k].prereqLeft
             && pExpr->pRight->iColumn==pIdx->aiColumn[j]
          ){
            sqliteExprCode(pParse, pExpr->pLeft);
            leFlag = pExpr->op==TK_GE;
            disableTerm(pLevel, &aExpr[k].p);
            break;
          }
        }
        testOp = OP_IdxGE;
      }else{
        testOp = nEqColumn>0 ? OP_IdxGE : OP_Noop;
        leFlag = 1;
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          if( aExpr[k].idxLeft==iCur
             && (pExpr->op==TK_GT || pExpr->op==TK_GE)
             && (aExpr[k].prereqRight & loopMask)==aExpr[k].prereqRight 
             && pExpr->pLeft->iColumn==pIdx->aiColumn[j]
          ){
            sqliteExprCode(pParse, pExpr->pRight);
            geFlag = pExpr->op==TK_GE;
            aExpr[k].p = 0;
            break;
          }
          if( aExpr[k].idxRight==iCur
             && (pExpr->op==TK_LT || pExpr->op==TK_LE)
             && (aExpr[k].prereqLeft & loopMask)==aExpr[k].prereqLeft
             && pExpr->pRight->iColumn==pIdx->aiColumn[j]
          ){
            sqliteExprCode(pParse, pExpr->pLeft);
            geFlag = pExpr->op==TK_LE;
            aExpr[k].p = 0;
            break;
          }
        }
      }else{
        geFlag = 1;
      }
      if( nEqColumn>0 || (score&2)!=0 ){







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          if( aExpr[k].idxLeft==iCur
             && (pExpr->op==TK_GT || pExpr->op==TK_GE)
             && (aExpr[k].prereqRight & loopMask)==aExpr[k].prereqRight 
             && pExpr->pLeft->iColumn==pIdx->aiColumn[j]
          ){
            sqliteExprCode(pParse, pExpr->pRight);
            geFlag = pExpr->op==TK_GE;
            disableTerm(pLevel, &aExpr[k].p);
            break;
          }
          if( aExpr[k].idxRight==iCur
             && (pExpr->op==TK_LT || pExpr->op==TK_LE)
             && (aExpr[k].prereqLeft & loopMask)==aExpr[k].prereqLeft
             && pExpr->pRight->iColumn==pIdx->aiColumn[j]
          ){
            sqliteExprCode(pParse, pExpr->pLeft);
            geFlag = pExpr->op==TK_LE;
            disableTerm(pLevel, &aExpr[k].p);
            break;
          }
        }
      }else{
        geFlag = 1;
      }
      if( nEqColumn>0 || (score&2)!=0 ){
Changes to test/tclsqlite.test.
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# This file implements regression tests for TCL interface to the
# SQLite library. 
#
# Actually, all tests are based on the TCL interface, so the main
# interface is pretty well tested.  This file contains some addition
# tests for fringe issues that the main test suite does not cover.
#
# $Id: tclsqlite.test,v 1.20 2004/02/25 22:51:06 rdc Exp $

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

# Check the error messages generated by tclsqlite
#
if {[sqlite -has-codec]} {







|







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# This file implements regression tests for TCL interface to the
# SQLite library. 
#
# Actually, all tests are based on the TCL interface, so the main
# interface is pretty well tested.  This file contains some addition
# tests for fringe issues that the main test suite does not cover.
#
# $Id: tclsqlite.test,v 1.20.2.1 2004/07/19 19:30:50 drh Exp $

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

# Check the error messages generated by tclsqlite
#
if {[sqlite -has-codec]} {
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    }
  } msg]
  regsub {:.*$} $msg {} msg
  lappend v $msg
} {1 {syntax error in expression "x*"}}

if {[sqlite -encoding]=="UTF-8" && [sqlite -tcl-uses-utf]} {

  do_test tcl-2.1 {
    execsql "CREATE TABLE t\u0123x(a int, b\u1235 float)"
    execsql "PRAGMA table_info(t\u0123x)"
  } "0 a int 0 {} 0 1 b\u1235 float 0 {} 0"
  do_test tcl-2.2 {
    execsql "INSERT INTO t\u0123x VALUES(1,2.3)"
    db eval "SELECT * FROM t\u0123x" result break







>







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    }
  } msg]
  regsub {:.*$} $msg {} msg
  lappend v $msg
} {1 {syntax error in expression "x*"}}

if {[sqlite -encoding]=="UTF-8" && [sqlite -tcl-uses-utf]} {
  catch {unset ::result}
  do_test tcl-2.1 {
    execsql "CREATE TABLE t\u0123x(a int, b\u1235 float)"
    execsql "PRAGMA table_info(t\u0123x)"
  } "0 a int 0 {} 0 1 b\u1235 float 0 {} 0"
  do_test tcl-2.2 {
    execsql "INSERT INTO t\u0123x VALUES(1,2.3)"
    db eval "SELECT * FROM t\u0123x" result break