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Overview
Comment:Add the sqlite3_result_error_code() application interface. Use it in the ATTACH function so that a failed attach returns a proper error code. Ticket #2914. (CVS 4775)
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SHA1: c24616204307936d03d39d2ef0fe6856113f6977
User & Date: drh 2008-02-06 14:11:35.000
Context
2008-02-06
14:14
Bump the version number to 3.5.6. (CVS 4776) (check-in: 3444efabfc user: drh tags: trunk)
14:11
Add the sqlite3_result_error_code() application interface. Use it in the ATTACH function so that a failed attach returns a proper error code. Ticket #2914. (CVS 4775) (check-in: c246162043 user: drh tags: trunk)
2008-02-02
20:47
Delete unused "pager3_refinfo_enable" flag and its associated debugging macros. Ticket #2923. (CVS 4774) (check-in: fccb217d91 user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/attach.c.
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/*
** 2003 April 6
**
** 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 contains code used to implement the ATTACH and DETACH commands.
**
** $Id: attach.c,v 1.70 2008/01/23 03:03:05 drh Exp $
*/
#include "sqliteInt.h"

#ifndef SQLITE_OMIT_ATTACH
/*
** Resolve an expression that was part of an ATTACH or DETACH statement. This
** is slightly different from resolving a normal SQL expression, because simple













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/*
** 2003 April 6
**
** 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 contains code used to implement the ATTACH and DETACH commands.
**
** $Id: attach.c,v 1.71 2008/02/06 14:11:35 drh Exp $
*/
#include "sqliteInt.h"

#ifndef SQLITE_OMIT_ATTACH
/*
** Resolve an expression that was part of an ATTACH or DETACH statement. This
** is slightly different from resolving a normal SQL expression, because simple
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  if( zErrDyn ){
    sqlite3_result_error(context, zErrDyn, -1);
    sqlite3_free(zErrDyn);
  }else{
    zErr[sizeof(zErr)-1] = 0;
    sqlite3_result_error(context, zErr, -1);
  }

}

/*
** An SQL user-function registered to do the work of an DETACH statement. The
** three arguments to the function come directly from a detach statement:
**
**     DETACH DATABASE x







>







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  if( zErrDyn ){
    sqlite3_result_error(context, zErrDyn, -1);
    sqlite3_free(zErrDyn);
  }else{
    zErr[sizeof(zErr)-1] = 0;
    sqlite3_result_error(context, zErr, -1);
  }
  if( rc ) sqlite3_result_error_code(context, rc);
}

/*
** An SQL user-function registered to do the work of an DETACH statement. The
** three arguments to the function come directly from a detach statement:
**
**     DETACH DATABASE x
Changes to src/sqlite.h.in.
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** on how SQLite interfaces are suppose to operate.
**
** The name of this file under configuration management is "sqlite.h.in".
** The makefile makes some minor changes to this file (such as inserting
** the version number) and changes its name to "sqlite3.h" as
** part of the build process.
**
** @(#) $Id: sqlite.h.in,v 1.283 2008/01/31 17:21:22 drh Exp $
*/
#ifndef _SQLITE3_H_
#define _SQLITE3_H_
#include <stdarg.h>     /* Needed for the definition of va_list */

/*
** Make sure we can call this stuff from C++.







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** on how SQLite interfaces are suppose to operate.
**
** The name of this file under configuration management is "sqlite.h.in".
** The makefile makes some minor changes to this file (such as inserting
** the version number) and changes its name to "sqlite3.h" as
** part of the build process.
**
** @(#) $Id: sqlite.h.in,v 1.284 2008/02/06 14:11:35 drh Exp $
*/
#ifndef _SQLITE3_H_
#define _SQLITE3_H_
#include <stdarg.h>     /* Needed for the definition of va_list */

/*
** Make sure we can call this stuff from C++.
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** {F16415} If the third parameter to sqlite3_result_error() or
** sqlite3_result_error16() is non-negative then SQLite takes that many
** bytes (not characters) from the 2nd parameter as the error message.
** {F16417} The sqlite3_result_error() and sqlite3_result_error16()
** routines make a copy private copy of the error message text before
** they return.  {END} Hence, the calling function can deallocate or
** modify the text after they return without harm.



**
** {F16421} The sqlite3_result_toobig() interface causes SQLite
** to throw an error indicating that a string or BLOB is to long
** to represent.  {F16422} The sqlite3_result_nomem() interface
** causes SQLite to throw an exception indicating that the a
** memory allocation failed.
**







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** {F16415} If the third parameter to sqlite3_result_error() or
** sqlite3_result_error16() is non-negative then SQLite takes that many
** bytes (not characters) from the 2nd parameter as the error message.
** {F16417} The sqlite3_result_error() and sqlite3_result_error16()
** routines make a copy private copy of the error message text before
** they return.  {END} Hence, the calling function can deallocate or
** modify the text after they return without harm.
** The sqlite3_result_error_code() function changes the error code
** returned by SQLite as a result of an error in a function.  By default,
** the error code is SQLITE_ERROR. 
**
** {F16421} The sqlite3_result_toobig() interface causes SQLite
** to throw an error indicating that a string or BLOB is to long
** to represent.  {F16422} The sqlite3_result_nomem() interface
** causes SQLite to throw an exception indicating that the a
** memory allocation failed.
**
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*/
void sqlite3_result_blob(sqlite3_context*, const void*, int, void(*)(void*));
void sqlite3_result_double(sqlite3_context*, double);
void sqlite3_result_error(sqlite3_context*, const char*, int);
void sqlite3_result_error16(sqlite3_context*, const void*, int);
void sqlite3_result_error_toobig(sqlite3_context*);
void sqlite3_result_error_nomem(sqlite3_context*);

void sqlite3_result_int(sqlite3_context*, int);
void sqlite3_result_int64(sqlite3_context*, sqlite3_int64);
void sqlite3_result_null(sqlite3_context*);
void sqlite3_result_text(sqlite3_context*, const char*, int, void(*)(void*));
void sqlite3_result_text16(sqlite3_context*, const void*, int, void(*)(void*));
void sqlite3_result_text16le(sqlite3_context*, const void*, int,void(*)(void*));
void sqlite3_result_text16be(sqlite3_context*, const void*, int,void(*)(void*));







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*/
void sqlite3_result_blob(sqlite3_context*, const void*, int, void(*)(void*));
void sqlite3_result_double(sqlite3_context*, double);
void sqlite3_result_error(sqlite3_context*, const char*, int);
void sqlite3_result_error16(sqlite3_context*, const void*, int);
void sqlite3_result_error_toobig(sqlite3_context*);
void sqlite3_result_error_nomem(sqlite3_context*);
void sqlite3_result_error_code(sqlite3_context*, int);
void sqlite3_result_int(sqlite3_context*, int);
void sqlite3_result_int64(sqlite3_context*, sqlite3_int64);
void sqlite3_result_null(sqlite3_context*);
void sqlite3_result_text(sqlite3_context*, const char*, int, void(*)(void*));
void sqlite3_result_text16(sqlite3_context*, const void*, int, void(*)(void*));
void sqlite3_result_text16le(sqlite3_context*, const void*, int,void(*)(void*));
void sqlite3_result_text16be(sqlite3_context*, const void*, int,void(*)(void*));
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 1.707 2008/01/31 19:34:52 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
** The following global variable is incremented every time a cursor







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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 1.708 2008/02/06 14:11:35 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
#include "vdbeInt.h"

/*
** The following global variable is incremented every time a cursor
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    pOp->p4.pVdbeFunc = ctx.pVdbeFunc;
    pOp->p4type = P4_VDBEFUNC;
  }

  /* If the function returned an error, throw an exception */
  if( ctx.isError ){
    sqlite3SetString(&p->zErrMsg, sqlite3_value_text(&ctx.s), (char*)0);
    rc = SQLITE_ERROR;
  }

  /* Copy the result of the function into register P3 */
  sqlite3VdbeChangeEncoding(&ctx.s, encoding);
  assert( pOp->p3>0 && pOp->p3<=p->nMem );
  pOut = &p->aMem[pOp->p3];
  sqlite3VdbeMemMove(pOut, &ctx.s);







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    pOp->p4.pVdbeFunc = ctx.pVdbeFunc;
    pOp->p4type = P4_VDBEFUNC;
  }

  /* If the function returned an error, throw an exception */
  if( ctx.isError ){
    sqlite3SetString(&p->zErrMsg, sqlite3_value_text(&ctx.s), (char*)0);
    rc = ctx.isError;
  }

  /* Copy the result of the function into register P3 */
  sqlite3VdbeChangeEncoding(&ctx.s, encoding);
  assert( pOp->p3>0 && pOp->p3<=p->nMem );
  pOut = &p->aMem[pOp->p3];
  sqlite3VdbeMemMove(pOut, &ctx.s);
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    assert( pOp[-1].p4type==P4_COLLSEQ );
    assert( pOp[-1].opcode==OP_CollSeq );
    ctx.pColl = pOp[-1].p4.pColl;
  }
  (ctx.pFunc->xStep)(&ctx, n, apVal);
  if( ctx.isError ){
    sqlite3SetString(&p->zErrMsg, sqlite3_value_text(&ctx.s), (char*)0);
    rc = SQLITE_ERROR;
  }
  sqlite3VdbeMemRelease(&ctx.s);
  break;
}

/* Opcode: AggFinal P1 P2 * P4 *
**







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    assert( pOp[-1].p4type==P4_COLLSEQ );
    assert( pOp[-1].opcode==OP_CollSeq );
    ctx.pColl = pOp[-1].p4.pColl;
  }
  (ctx.pFunc->xStep)(&ctx, n, apVal);
  if( ctx.isError ){
    sqlite3SetString(&p->zErrMsg, sqlite3_value_text(&ctx.s), (char*)0);
    rc = ctx.isError;
  }
  sqlite3VdbeMemRelease(&ctx.s);
  break;
}

/* Opcode: AggFinal P1 P2 * P4 *
**
Changes to src/vdbeInt.h.
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** (Mem) which are only defined there.
*/
struct sqlite3_context {
  FuncDef *pFunc;       /* Pointer to function information.  MUST BE FIRST */
  VdbeFunc *pVdbeFunc;  /* Auxilary data, if created. */
  Mem s;                /* The return value is stored here */
  Mem *pMem;            /* Memory cell used to store aggregate context */
  u8 isError;           /* Set to true for an error */
  CollSeq *pColl;       /* Collating sequence */
};

/*
** A Set structure is used for quick testing to see if a value
** is part of a small set.  Sets are used to implement code like
** this:







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** (Mem) which are only defined there.
*/
struct sqlite3_context {
  FuncDef *pFunc;       /* Pointer to function information.  MUST BE FIRST */
  VdbeFunc *pVdbeFunc;  /* Auxilary data, if created. */
  Mem s;                /* The return value is stored here */
  Mem *pMem;            /* Memory cell used to store aggregate context */
  int isError;          /* Error code returned by the function. */
  CollSeq *pColl;       /* Collating sequence */
};

/*
** A Set structure is used for quick testing to see if a value
** is part of a small set.  Sets are used to implement code like
** this:
Changes to src/vdbeapi.c.
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}
void sqlite3_result_double(sqlite3_context *pCtx, double rVal){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetDouble(&pCtx->s, rVal);
}
void sqlite3_result_error(sqlite3_context *pCtx, const char *z, int n){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  pCtx->isError = 1;
  sqlite3VdbeMemSetStr(&pCtx->s, z, n, SQLITE_UTF8, SQLITE_TRANSIENT);
}
#ifndef SQLITE_OMIT_UTF16
void sqlite3_result_error16(sqlite3_context *pCtx, const void *z, int n){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  pCtx->isError = 1;
  sqlite3VdbeMemSetStr(&pCtx->s, z, n, SQLITE_UTF16NATIVE, SQLITE_TRANSIENT);
}
#endif
void sqlite3_result_int(sqlite3_context *pCtx, int iVal){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetInt64(&pCtx->s, (i64)iVal);
}







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}
void sqlite3_result_double(sqlite3_context *pCtx, double rVal){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetDouble(&pCtx->s, rVal);
}
void sqlite3_result_error(sqlite3_context *pCtx, const char *z, int n){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  pCtx->isError = SQLITE_ERROR;
  sqlite3VdbeMemSetStr(&pCtx->s, z, n, SQLITE_UTF8, SQLITE_TRANSIENT);
}
#ifndef SQLITE_OMIT_UTF16
void sqlite3_result_error16(sqlite3_context *pCtx, const void *z, int n){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  pCtx->isError = SQLITE_ERROR;
  sqlite3VdbeMemSetStr(&pCtx->s, z, n, SQLITE_UTF16NATIVE, SQLITE_TRANSIENT);
}
#endif
void sqlite3_result_int(sqlite3_context *pCtx, int iVal){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetInt64(&pCtx->s, (i64)iVal);
}
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  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemCopy(&pCtx->s, pValue);
}
void sqlite3_result_zeroblob(sqlite3_context *pCtx, int n){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetZeroBlob(&pCtx->s, n);
}




/* Force an SQLITE_TOOBIG error. */
void sqlite3_result_error_toobig(sqlite3_context *pCtx){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetZeroBlob(&pCtx->s, SQLITE_MAX_LENGTH+1);
}

/* An SQLITE_NOMEM error. */
void sqlite3_result_error_nomem(sqlite3_context *pCtx){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetNull(&pCtx->s);
  pCtx->isError = 1;
  pCtx->s.db->mallocFailed = 1;
}

/*
** Execute the statement pStmt, either until a row of data is ready, the
** statement is completely executed or an error occurs.
**







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  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemCopy(&pCtx->s, pValue);
}
void sqlite3_result_zeroblob(sqlite3_context *pCtx, int n){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetZeroBlob(&pCtx->s, n);
}
void sqlite3_result_error_code(sqlite3_context *pCtx, int errCode){
  pCtx->isError = errCode;
}

/* Force an SQLITE_TOOBIG error. */
void sqlite3_result_error_toobig(sqlite3_context *pCtx){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetZeroBlob(&pCtx->s, SQLITE_MAX_LENGTH+1);
}

/* An SQLITE_NOMEM error. */
void sqlite3_result_error_nomem(sqlite3_context *pCtx){
  assert( sqlite3_mutex_held(pCtx->s.db->mutex) );
  sqlite3VdbeMemSetNull(&pCtx->s);
  pCtx->isError = SQLITE_NOMEM;
  pCtx->s.db->mallocFailed = 1;
}

/*
** Execute the statement pStmt, either until a row of data is ready, the
** statement is completely executed or an error occurs.
**
Changes to test/attach.test.
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#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this script is testing the ATTACH and DETACH commands
# and related functionality.
#
# $Id: attach.test,v 1.47 2007/10/09 08:29:32 danielk1977 Exp $
#

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

ifcapable !attach {
  finish_test







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#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this script is testing the ATTACH and DETACH commands
# and related functionality.
#
# $Id: attach.test,v 1.48 2008/02/06 14:11:35 drh Exp $
#

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

ifcapable !attach {
  finish_test
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} {0 main 2 db2 3 db3 4 db4 5 db5 6 db6 7 db7 8 db8 9 db9}
} ;# ifcapable schema_pragmas 
do_test attach-1.12 {
  catchsql {
    ATTACH 'test.db' as db2;
  }
} {1 {database db2 is already in use}}



do_test attach-1.13 {
  catchsql {
    ATTACH 'test.db' as db5;
  }
} {1 {database db5 is already in use}}
do_test attach-1.14 {
  catchsql {







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} {0 main 2 db2 3 db3 4 db4 5 db5 6 db6 7 db7 8 db8 9 db9}
} ;# ifcapable schema_pragmas 
do_test attach-1.12 {
  catchsql {
    ATTACH 'test.db' as db2;
  }
} {1 {database db2 is already in use}}
do_test attach-1.12.2 {
  db errorcode
} {1}
do_test attach-1.13 {
  catchsql {
    ATTACH 'test.db' as db5;
  }
} {1 {database db5 is already in use}}
do_test attach-1.14 {
  catchsql {
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  }
} {0 {}}
do_test attach-1.19 {
  catchsql {
    ATTACH 'test.db' as db12;
  }
} {1 {too many attached databases - max 10}}



do_test attach-1.20.1 {
  execsql {
    DETACH db5;
  }
} {}
ifcapable schema_pragmas {
do_test attach-1.20.2 {







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  }
} {0 {}}
do_test attach-1.19 {
  catchsql {
    ATTACH 'test.db' as db12;
  }
} {1 {too many attached databases - max 10}}
do_test attach-1.19.1 {
  db errorcode
} {1}
do_test attach-1.20.1 {
  execsql {
    DETACH db5;
  }
} {}
ifcapable schema_pragmas {
do_test attach-1.20.2 {
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  }
} {0 {}}
do_test attach-1.22 {
  catchsql {
    ATTACH 'test.db' as db13;
  }
} {1 {too many attached databases - max 10}}



do_test attach-1.23 {
  catchsql {
    DETACH "db14";
  }
} {1 {no such database: db14}}
do_test attach-1.24 {
  catchsql {







>
>
>







182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
  }
} {0 {}}
do_test attach-1.22 {
  catchsql {
    ATTACH 'test.db' as db13;
  }
} {1 {too many attached databases - max 10}}
do_test attach-1.22.1 {
  db errorcode
} {1}
do_test attach-1.23 {
  catchsql {
    DETACH "db14";
  }
} {1 {no such database: db14}}
do_test attach-1.24 {
  catchsql {
720
721
722
723
724
725
726



727
728
729
730
731
732
733
      file delete -force cannot-read
      exit 1
    }
    catchsql {
      ATTACH DATABASE 'cannot-read' AS noread;
    }
  } {1 {unable to open database: cannot-read}}



  file delete -force cannot-read
}

# Check the error message if we try to access a database that has
# not been attached.
do_test attach-6.3 {
  catchsql {







>
>
>







729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
      file delete -force cannot-read
      exit 1
    }
    catchsql {
      ATTACH DATABASE 'cannot-read' AS noread;
    }
  } {1 {unable to open database: cannot-read}}
  do_test attach-6.2.2 {
    db errorcode
  } {14}
  file delete -force cannot-read
}

# Check the error message if we try to access a database that has
# not been attached.
do_test attach-6.3 {
  catchsql {
748
749
750
751
752
753
754






























755
    catchsql {
      DETACH RAISE ( IGNORE ) IN ( SELECT "AAAAAA" . * ORDER BY 
      REGISTER LIMIT "AAAAAA" . "AAAAAA" OFFSET RAISE ( IGNORE ) NOT NULL )
    }
  } {1 {invalid name: "RAISE ( IGNORE ) IN ( SELECT "AAAAAA" . * ORDER BY 
      REGISTER LIMIT "AAAAAA" . "AAAAAA" OFFSET RAISE ( IGNORE ) NOT NULL )"}}
}






























finish_test







>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>

760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
    catchsql {
      DETACH RAISE ( IGNORE ) IN ( SELECT "AAAAAA" . * ORDER BY 
      REGISTER LIMIT "AAAAAA" . "AAAAAA" OFFSET RAISE ( IGNORE ) NOT NULL )
    }
  } {1 {invalid name: "RAISE ( IGNORE ) IN ( SELECT "AAAAAA" . * ORDER BY 
      REGISTER LIMIT "AAAAAA" . "AAAAAA" OFFSET RAISE ( IGNORE ) NOT NULL )"}}
}

# Create a malformed file (a file that is not a valid database)
# and try to attach it
#
do_test attach-8.1 {
  set fd [open test2.db w]
  puts $fd "This file is not a valid SQLite database"
  close $fd
  catchsql {
    ATTACH 'test2.db' AS t2;
  }
} {1 {file is encrypted or is not a database}}
do_test attach-8.2 {
  db errorcode
} {26}
file delete -force test2.db
do_test attach-8.3 {
  sqlite3 db2 test2.db
  db2 eval {CREATE TABLE t1(x); BEGIN EXCLUSIVE}
  catchsql {
    ATTACH 'test2.db' AS t2;
  }
} {1 {database is locked}}
do_test attach-8.4 {
  db errorcode
} {5}
db2 close
file delete -force test2.db


finish_test