SQLite

  sqlite3session S db main
  S attach t5
  execsql { DELETE FROM t5 }
  S isempty
} {1}
do_test 8.4 { S delete } {}

do_test 8.5 {
  sqlite3session S db main
  S attach t5
  S attach t6
  execsql { INSERT INTO t5 VALUES(1, 2) }
  S isempty
} {0}

do_test 8.6 {
  S delete
  sqlite3session S db main
  S attach t5
  S attach t6
  execsql { INSERT INTO t6 VALUES(1, 2) }
  S isempty
} {0}
do_test 8.7 { S delete } {}

#-------------------------------------------------------------------------
#
do_execsql_test 9.1 {
  CREATE TABLE t7(a, b, c, d, e PRIMARY KEY, f, g);
  INSERT INTO t7 VALUES(1, 1, 1, 1, 1, 1, 1);
}
do_test 9.2 { 

  db2 close
}

proc do_patchset_changeset_test {tn initsql args} {
  foreach tstcmd {patchset changeset} {
    reset_db
    execsql $initsql
    set x 0
    foreach sql $args {
      incr x
      set lSql [split $sql ";"]
      uplevel [list do_patchset_test $tn.$tstcmd.$x $tstcmd $lSql]
    }
  }
}

do_patchset_changeset_test 5.1 {
  CREATE TABLE t1(a PRIMARY KEY, b, c);
  INSERT INTO t1 VALUES(1, 2, 3);

  INSERT INTO t2 SELECT NULL, * FROM t1;
  DELETE FROM t1;
  INSERT INTO t1 SELECT b, c, d FROM t2;
  UPDATE t1 SET b = b+1;
  UPDATE t1 SET b = b+1;
  UPDATE t1 SET b = b+1;
}

set initsql { CREATE TABLE t1(a, b, c, PRIMARY KEY(c, b)); }
for {set i 0} {$i < 1000} {incr i} {
  append insert "INSERT INTO t1 VALUES($i, $i, $i);"
  append delete "DELETE FROM t1 WHERE b=$i;"
}
do_patchset_changeset_test 5.3 \
  $initsql $insert $delete     \
  $insert $delete              \
  "$insert $delete"            \
  $delete


finish_test

  set testdir [file join [file dirname [info script]] .. .. test]
} 
source [file join [file dirname [info script]] session_common.tcl]
source $testdir/tester.tcl

set testprefix sessionfault



forcedelete test.db2
sqlite3 db2 test.db2
do_common_sql {
  CREATE TABLE t1(a, b, c, PRIMARY KEY(a, b));
  INSERT INTO t1 VALUES(1, 2, 3);
  INSERT INTO t1 VALUES(4, 5, 6);
}

    }]
    if { [changeset_to_list $::c] != $expected } {
      error "changeset mismatch"
    }
  }
}



faultsim_delete_and_reopen
do_test 9.2.prep {
  execsql { 
    PRAGMA encoding = 'utf16';
    CREATE TABLE t1(a PRIMARY KEY, b);
    INSERT INTO t1 VALUES('abcdefghij', 'ABCDEFGHIJKLMNOPQRSTUV');
  }

      {UPDATE t1 0 X. {t abcdefghij t ABCDEFGHIJKLMNOPQRSTUV} {{} {} t xyz}}
    }]
    if { [changeset_to_list $::c] != $expected } {
      error "changeset mismatch"
    }
  }
}

#-------------------------------------------------------------------------
# Test that if a conflict-handler encounters an OOM in 
# sqlite3_value_text() but goes on to return SQLITE_CHANGESET_REPLACE
# anyway, the OOM is picked up by the sessions module.
set bigstr [string repeat abcdefghij 100]
faultsim_delete_and_reopen
do_test 10.prep.1  {
  execsql {
    CREATE TABLE t1(a PRIMARY KEY, b);
    INSERT INTO t1 VALUES($bigstr, $bigstr);
  }

  sqlite3session S db main
  S attach *
  execsql { UPDATE t1 SET b = b||'x' }
  set C [S changeset]
  S delete
  execsql { UPDATE t1 SET b = b||'xyz' }
} {}
faultsim_save_and_close

faultsim_restore_and_reopen
do_test 10.prep.2  {
  proc xConflict {args} { return "ABORT" }
  list [catch { sqlite3changeset_apply db $C xConflict } msg] $msg
} {1 SQLITE_ABORT}
do_execsql_test 10.prep.3 { SELECT b=$bigstr||'x' FROM t1 } 0
do_test 10.prep.4  {
  proc xConflict {args} { return "REPLACE" }
  list [catch { sqlite3changeset_apply db $C xConflict } msg] $msg
} {0 {}}
do_execsql_test 10.prep.5 { SELECT b=$bigstr||'x' FROM t1 } 1
db close

do_faultsim_test 10 -faults oom-tra* -prep {
  faultsim_restore_and_reopen
} -body {
  sqlite3changeset_apply_replace_all db $::C 
} -test {
  faultsim_test_result {0 {}} {1 SQLITE_NOMEM}
  if {$testrc==0} {
    if {[db one {SELECT b=$bigstr||'x' FROM t1}]==0} {
      error "data does not look right"
    }
  }
}




finish_test

*/
static int sessionBindValue(
  sqlite3_stmt *pStmt,            /* Statement to bind value to */
  int i,                          /* Parameter number to bind to */
  sqlite3_value *pVal             /* Value to bind */
){
  int eType = sqlite3_value_type(pVal);
  /* COVERAGE: The (pVal->z==0) branch is never true using current versions
  ** of SQLite. If a malloc fails in an sqlite3_value_xxx() function, either
  ** the (pVal->z) variable remains as it was or the type of the value is
  ** set to SQLITE_NULL.  */
  if( (eType==SQLITE_TEXT || eType==SQLITE_BLOB) && pVal->z==0 ){
    /* This condition occurs when an earlier OOM in a call to
    ** sqlite3_value_text() or sqlite3_value_blob() (perhaps from within
    ** a conflict-handler) has zeroed the pVal->z pointer. Return NOMEM. */
    return SQLITE_NOMEM;
  }
  return sqlite3_bind_value(pStmt, i, pVal);
}

/*
** Iterator pIter must point to an SQLITE_INSERT entry. This function 

){
  int schemaMismatch = 0;
  sqlite3_changeset_iter *pIter;  /* Iterator to skip through changeset */  
  int rc;                         /* Return code */
  const char *zTab = 0;           /* Name of current table */
  int nTab = 0;                   /* Result of sqlite3Strlen30(zTab) */
  SessionApplyCtx sApply;         /* changeset_apply() context object */

  assert( xConflict!=0 );

  memset(&sApply, 0, sizeof(sApply));
  rc = sqlite3changeset_start(&pIter, nChangeset, pChangeset);
  if( rc!=SQLITE_OK ) return rc;

  sqlite3_mutex_enter(sqlite3_db_mutex(db));
  rc = sqlite3_exec(db, "SAVEPOINT changeset_apply", 0, 0, 0);

  }

  if( rc==SQLITE_OK ){
    int nFk, notUsed;
    sqlite3_db_status(db, SQLITE_DBSTATUS_DEFERRED_FKS, &nFk, &notUsed, 0);
    if( nFk!=0 ){
      int res = SQLITE_CHANGESET_ABORT;

      sqlite3_changeset_iter sIter;
      memset(&sIter, 0, sizeof(sIter));
      sIter.nCol = nFk;
      res = xConflict(pCtx, SQLITE_CHANGESET_FOREIGN_KEY, &sIter);

      if( res!=SQLITE_CHANGESET_OMIT ){
        rc = SQLITE_CONSTRAINT;
      }
    }
  }
  sqlite3_exec(db, "PRAGMA defer_foreign_keys = 0", 0, 0, 0);

**
** For each change for which there is a compatible table, an attempt is made 
** to modify the table contents according to the UPDATE, INSERT or DELETE 
** change. If a change cannot be applied cleanly, the conflict handler 
** function passed as the fifth argument to sqlite3changeset_apply() may be 
** invoked. A description of exactly when the conflict handler is invoked for 
** each type of change is below.
**
** Unlike the xFilter argument, xConflict may not be passed NULL. The results
** of passing anything other than a valid function pointer as the xConflict
** argument are undefined.
**
** Each time the conflict handler function is invoked, it must return one
** of [SQLITE_CHANGESET_OMIT], [SQLITE_CHANGESET_ABORT] or 
** [SQLITE_CHANGESET_REPLACE]. SQLITE_CHANGESET_REPLACE may only be returned
** if the second argument passed to the conflict handler is either
** SQLITE_CHANGESET_DATA or SQLITE_CHANGESET_CONFLICT. If the conflict-handler
** returns an illegal value, any changes already made are rolled back and

    }else{
      sqlite3_value *pVal;
      int rc = sqlite3changeset_old(pIter, -1, &pVal);
      assert( rc==SQLITE_RANGE );
      rc = sqlite3changeset_old(pIter, nCol, &pVal);
      assert( rc==SQLITE_RANGE );
    }
    if( eConf!=SQLITE_CHANGESET_FOREIGN_KEY ){
      /* eConf!=FOREIGN_KEY is always true at this point. The condition is 
      ** just there to make it clearer what is being tested.  */
      int nDummy;
      int rc = sqlite3changeset_fk_conflicts(pIter, &nDummy);
      assert( rc==SQLITE_MISUSE );
    }
    /* End of testing block
    ***********************************************************************/
  }

  if( TCL_OK!=Tcl_EvalObjEx(interp, pEval, TCL_EVAL_GLOBAL) ){
    Tcl_BackgroundError(interp);
  }else{

      Tcl_GetIntFromObj(0, pRes, &ret);
    }
  }

  Tcl_DecrRefCount(pEval);
  return ret;
}

/*
** The conflict handler used by sqlite3changeset_apply_replace_all(). 
** This conflict handler calls sqlite3_value_text16() on all available
** sqlite3_value objects and then returns CHANGESET_REPLACE, or 
** CHANGESET_OMIT if REPLACE is not applicable. This is used to test the
** effect of a malloc failure within an sqlite3_value_xxx() function
** invoked by a conflict-handler callback.
*/
static int replace_handler(
  void *pCtx,                     /* Pointer to TestConflictHandler structure */
  int eConf,                      /* DATA, MISSING, CONFLICT, CONSTRAINT */
  sqlite3_changeset_iter *pIter   /* Handle describing change and conflict */
){
  int op;                         /* SQLITE_UPDATE, DELETE or INSERT */
  const char *zTab;               /* Name of table conflict is on */
  int nCol;                       /* Number of columns in table zTab */
  int i;
  int x = 0;

  sqlite3changeset_op(pIter, &zTab, &nCol, &op, 0);

  if( op!=SQLITE_INSERT ){
    for(i=0; i<nCol; i++){
      sqlite3_value *pVal;
      sqlite3changeset_old(pIter, i, &pVal);
      sqlite3_value_text16(pVal);
      x++;
    }
  }

  if( op!=SQLITE_DELETE ){
    for(i=0; i<nCol; i++){
      sqlite3_value *pVal;
      sqlite3changeset_new(pIter, i, &pVal);
      sqlite3_value_text16(pVal);
      x++;
    }
  }

  if( eConf==SQLITE_CHANGESET_DATA ){
    return SQLITE_CHANGESET_REPLACE;
  }
  return SQLITE_CHANGESET_OMIT;
}

/*
** sqlite3changeset_apply DB CHANGESET CONFLICT-SCRIPT ?FILTER-SCRIPT?
*/
static int test_sqlite3changeset_apply(
  void * clientData,
  Tcl_Interp *interp,

  );
  if( rc!=SQLITE_OK ){
    return test_session_error(interp, rc);
  }
  Tcl_ResetResult(interp);
  return TCL_OK;
}

/*
** sqlite3changeset_apply_replace_all DB CHANGESET 
*/
static int test_sqlite3changeset_apply_replace_all(
  void * clientData,
  Tcl_Interp *interp,
  int objc,
  Tcl_Obj *CONST objv[]
){
  sqlite3 *db;                    /* Database handle */
  Tcl_CmdInfo info;               /* Database Tcl command (objv[1]) info */
  int rc;                         /* Return code from changeset_invert() */
  void *pChangeset;               /* Buffer containing changeset */
  int nChangeset;                 /* Size of buffer aChangeset in bytes */

  if( objc!=3 ){
    Tcl_WrongNumArgs(interp, 1, objv, "DB CHANGESET");
    return TCL_ERROR;
  }
  if( 0==Tcl_GetCommandInfo(interp, Tcl_GetString(objv[1]), &info) ){
    Tcl_AppendResult(interp, "no such handle: ", Tcl_GetString(objv[2]), 0);
    return TCL_ERROR;
  }
  db = *(sqlite3 **)info.objClientData;
  pChangeset = (void *)Tcl_GetByteArrayFromObj(objv[2], &nChangeset);

  rc = sqlite3changeset_apply(db, nChangeset, pChangeset, 0, replace_handler,0);
  if( rc!=SQLITE_OK ){
    return test_session_error(interp, rc);
  }
  Tcl_ResetResult(interp);
  return TCL_OK;
}


/*
** sqlite3changeset_invert CHANGESET
*/
static int test_sqlite3changeset_invert(
  void * clientData,
  Tcl_Interp *interp,

    Tcl_Obj *pOld;                /* Vector of old.* values */
    Tcl_Obj *pNew;                /* Vector of new.* values */
    int bIndirect;

    char *zPK;
    unsigned char *abPK;
    int i;

    /* Test that _fk_conflicts() returns SQLITE_MISUSE if called on this
    ** iterator. */
    int nDummy;
    if( SQLITE_MISUSE!=sqlite3changeset_fk_conflicts(pIter, &nDummy) ){
      sqlite3changeset_finalize(pIter);
      return TCL_ERROR;
    }

    sqlite3changeset_op(pIter, &zTab, &nCol, &op, &bIndirect);
    pVar = Tcl_NewObj();
    Tcl_ListObjAppendElement(0, pVar, Tcl_NewStringObj(
          op==SQLITE_INSERT ? "INSERT" :
          op==SQLITE_UPDATE ? "UPDATE" : 
          "DELETE", -1

  );
  Tcl_CreateObjCommand(
      interp, "sqlite3changeset_concat", test_sqlite3changeset_concat, 0, 0
  );
  Tcl_CreateObjCommand(
      interp, "sqlite3changeset_apply", test_sqlite3changeset_apply, 0, 0
  );
  Tcl_CreateObjCommand(
      interp, "sqlite3changeset_apply_replace_all", 
      test_sqlite3changeset_apply_replace_all, 0, 0
  );
  return TCL_OK;
}

#endif /* SQLITE_TEST && SQLITE_SESSION && SQLITE_PREUPDATE_HOOK */