sqlite4ErrorMsg(pParse, "virtual tables may not be indexed");
    return 0;
  }

  /* Ensure that the proposed index name is not reserved. */
  assert( pName->z!=0 );
  zName = sqlite4NameFromToken(db, pName);
  if( zName==0 || sqlite4CheckObjectName(pParse, zName) ) return 0;



  /* Unless SQLite is currently parsing an existing database schema, check
  ** that there is not already an index or table using the proposed name.  */
  if( !db->init.busy ){
    char *zDb = db->aDb[iDb].zName;
    if( sqlite4FindTable(db, zName, zDb)!=0 ){
      sqlite4ErrorMsg(pParse, "there is already a table named %s", zName);
    }
    else if( sqlite4FindIndex(db, zName, zDb)!=0 ){
      if( p->bIfnotexist ){
        assert( !db->init.busy );

    sqlite4ErrorMsg(pParse, "virtual tables may not be indexed");
    return 0;
  }

  /* Ensure that the proposed index name is not reserved. */
  assert( pName->z!=0 );
  zName = sqlite4NameFromToken(db, pName);
  if( zName==0 || sqlite4CheckObjectName(pParse, zName) ){
    pTab = 0;
  }

  /* Unless SQLite is currently parsing an existing database schema, check
  ** that there is not already an index or table using the proposed name.  */
  else if( !db->init.busy ){
    char *zDb = db->aDb[iDb].zName;
    if( sqlite4FindTable(db, zName, zDb)!=0 ){
      sqlite4ErrorMsg(pParse, "there is already a table named %s", zName);
    }
    else if( sqlite4FindIndex(db, zName, zDb)!=0 ){
      if( p->bIfnotexist ){
        assert( !db->init.busy );

  execsql {SELECT f1 FROM test1 WHERE f2=65536}
} {16}
do_test index-7.3 {
  execsql {
    SELECT name FROM sqlite_master 
    WHERE type='index' AND tbl_name='test1'
  }
} {sqlite_autoindex_test1_1}
do_test index-7.4 {
  execsql {DROP table test1}
  execsql {SELECT name FROM sqlite_master WHERE type!='meta'}
} {}
integrity_check index-7.5

# Make sure we cannot drop a non-existant index.
................................................................................
      PRIMARY KEY(b)
    );
  }
  for {set i 1} {$i<=50} {incr i} {
    execsql "INSERT INTO t3 VALUES('x${i}x',$i,0.$i)"
  }
  set sqlite_search_count 0
  concat [execsql {SELECT c FROM t3 WHERE b==10}] $sqlite_search_count
} {0.1 2}
integrity_check index-11.2


# Numeric strings should compare as if they were numbers.  So even if the
# strings are not character-by-character the same, if they represent the
# same number they should compare equal to one another.  Verify that this
# is true in indices.
................................................................................
   );
   INSERT INTO t5 VALUES(1,2,3);
   SELECT * FROM t5;
  }
} {1 2.0 3}
do_test index-13.2 {
  set ::idxlist [execsql {
    SELECT name FROM sqlite_master WHERE type="index" AND tbl_name="t5";
  }]
  llength $::idxlist
} {3}
for {set i 0} {$i<[llength $::idxlist]} {incr i} {
  do_test index-13.3.$i {
    catchsql "
      DROP INDEX '[lindex $::idxlist $i]';
    "
  } {1 {index associated with UNIQUE or PRIMARY KEY constraint cannot be dropped}}
}
................................................................................
} {1}
do_test index-16.3 {
  execsql {
    DROP TABLE t7;
    CREATE TABLE t7(c PRIMARY KEY, UNIQUE(c) );
    SELECT count(*) FROM sqlite_master WHERE tbl_name = 't7' AND type = 'index';
  }
} {1}
do_test index-16.4 {
  execsql {
    DROP TABLE t7;
    CREATE TABLE t7(c, d , UNIQUE(c, d), PRIMARY KEY(c, d) );
    SELECT count(*) FROM sqlite_master WHERE tbl_name = 't7' AND type = 'index';
  }
} {1}
do_test index-16.5 {
  execsql {
    DROP TABLE t7;
    CREATE TABLE t7(c, d , UNIQUE(c), PRIMARY KEY(c, d) );
    SELECT count(*) FROM sqlite_master WHERE tbl_name = 't7' AND type = 'index';
  }
} {2}

# Test that automatically create indices are named correctly. The current
# convention is: "sqlite_autoindex_<table name>_<integer>"
#
# Then check that it is an error to try to drop any automtically created
# indices.
do_test index-17.1 {
  execsql {
    DROP TABLE t7;
    CREATE TABLE t7(c, d UNIQUE, UNIQUE(c), PRIMARY KEY(c, d) );
    SELECT name FROM sqlite_master WHERE tbl_name = 't7' AND type = 'index';
  }
} {sqlite_autoindex_t7_1 sqlite_autoindex_t7_2 sqlite_autoindex_t7_3}
do_test index-17.2 {
  catchsql {
    DROP INDEX sqlite_autoindex_t7_1;
  }
} {1 {index associated with UNIQUE or PRIMARY KEY constraint cannot be dropped}}
do_test index-17.3 {
  catchsql {
    DROP INDEX IF EXISTS sqlite_autoindex_t7_1;
  }
} {1 {index associated with UNIQUE or PRIMARY KEY constraint cannot be dropped}}
do_test index-17.4 {
  catchsql {
    DROP INDEX IF EXISTS no_such_index;
  }
} {0 {}}
................................................................................
    }
  } {}
  do_test index-19.2 {
    catchsql {
      BEGIN;
      INSERT INTO t7 VALUES(1);
    }
  } {1 {column a is not unique}}
  do_test index-19.3 {
    catchsql {
      BEGIN;
    }
  } {1 {cannot start a transaction within a transaction}}
  do_test index-19.4 {
    catchsql {
      INSERT INTO t8 VALUES(1);
    }
  } {1 {column a is not unique}}
  do_test index-19.5 {
    catchsql {
      BEGIN;
      COMMIT;
    }
  } {0 {}}
  do_test index-19.6 {

  execsql {SELECT f1 FROM test1 WHERE f2=65536}
} {16}
do_test index-7.3 {
  execsql {
    SELECT name FROM sqlite_master 
    WHERE type='index' AND tbl_name='test1'
  }
} {}
do_test index-7.4 {
  execsql {DROP table test1}
  execsql {SELECT name FROM sqlite_master WHERE type!='meta'}
} {}
integrity_check index-7.5

# Make sure we cannot drop a non-existant index.
................................................................................
      PRIMARY KEY(b)
    );
  }
  for {set i 1} {$i<=50} {incr i} {
    execsql "INSERT INTO t3 VALUES('x${i}x',$i,0.$i)"
  }
  set sqlite_search_count 0
  execsql {SELECT c FROM t3 WHERE b==10}
} {0.1}
integrity_check index-11.2


# Numeric strings should compare as if they were numbers.  So even if the
# strings are not character-by-character the same, if they represent the
# same number they should compare equal to one another.  Verify that this
# is true in indices.
................................................................................
   );
   INSERT INTO t5 VALUES(1,2,3);
   SELECT * FROM t5;
  }
} {1 2.0 3}
do_test index-13.2 {
  set ::idxlist [execsql {
    SELECT name FROM sqlite_master WHERE type='index' AND tbl_name='t5';
  }]
  llength $::idxlist
} {2}
for {set i 0} {$i<[llength $::idxlist]} {incr i} {
  do_test index-13.3.$i {
    catchsql "
      DROP INDEX '[lindex $::idxlist $i]';
    "
  } {1 {index associated with UNIQUE or PRIMARY KEY constraint cannot be dropped}}
}
................................................................................
} {1}
do_test index-16.3 {
  execsql {
    DROP TABLE t7;
    CREATE TABLE t7(c PRIMARY KEY, UNIQUE(c) );
    SELECT count(*) FROM sqlite_master WHERE tbl_name = 't7' AND type = 'index';
  }
} {0}
do_test index-16.4 {
  execsql {
    DROP TABLE t7;
    CREATE TABLE t7(c, d , UNIQUE(c, d), PRIMARY KEY(c, d) );
    SELECT count(*) FROM sqlite_master WHERE tbl_name = 't7' AND type = 'index';
  }
} {1}
do_test index-16.5 {
  execsql {
    DROP TABLE t7;
    CREATE TABLE t7(c, d , UNIQUE(c), PRIMARY KEY(c, d) );
    SELECT count(*) FROM sqlite_master WHERE tbl_name = 't7' AND type = 'index';
  }
} {1}

# Test that automatically create indices are named correctly. The current
# convention is: "sqlite_autoindex_<table name>_<integer>"
#
# Then check that it is an error to try to drop any automtically created
# indices.
do_test index-17.1 {
  execsql {
    DROP TABLE t7;
    CREATE TABLE t7(c, d UNIQUE, UNIQUE(c), PRIMARY KEY(c, d) );
    SELECT name FROM sqlite_master WHERE tbl_name = 't7' AND type = 'index';
  }
} {sqlite_t7_unique1 sqlite_t7_unique2}
do_test index-17.2 {
  catchsql {
    DROP INDEX sqlite_t7_unique1;
  }
} {1 {index associated with UNIQUE or PRIMARY KEY constraint cannot be dropped}}
do_test index-17.3 {
  catchsql {
    DROP INDEX IF EXISTS sqlite_t7_unique1;
  }
} {1 {index associated with UNIQUE or PRIMARY KEY constraint cannot be dropped}}
do_test index-17.4 {
  catchsql {
    DROP INDEX IF EXISTS no_such_index;
  }
} {0 {}}
................................................................................
    }
  } {}
  do_test index-19.2 {
    catchsql {
      BEGIN;
      INSERT INTO t7 VALUES(1);
    }
  } {1 {PRIMARY KEY must be unique}}
  do_test index-19.3 {
    catchsql {
      BEGIN;
    }
  } {1 {cannot start a transaction within a transaction}}
  do_test index-19.4 {
    catchsql {
      INSERT INTO t8 VALUES(1);
    }
  } {1 {PRIMARY KEY must be unique}}
  do_test index-19.5 {
    catchsql {
      BEGIN;
      COMMIT;
    }
  } {0 {}}
  do_test index-19.6 {

    COMMIT;
    UPDATE t1 SET b=substr(b,-5,5);
    SELECT count(*) from t1;
  }
} 64
set origsize [file size test.db]
set cksum [db eval {SELECT md5sum(a || b) FROM t1}]
ifcapable {vacuum} {
  interrupt_test interrupt-2.2 {VACUUM} {} 100
}
do_test interrupt-2.3 {
  execsql {
    SELECT md5sum(a || b) FROM t1;
  }
} $cksum
ifcapable {vacuum && !default_autovacuum} {
  do_test interrupt-2.4 {
    expr {$::origsize>[file size test.db]}
  } 1
}
ifcapable {explain} {
  do_test interrupt-2.5 {
    set sql {EXPLAIN SELECT max(a,b), a, b FROM t1}
    execsql $sql
    set rc [catch {db eval $sql {sqlite4_interrupt $DB}} msg]
    lappend rc $msg
  } {1 interrupted}

    COMMIT;
    UPDATE t1 SET b=substr(b,-5,5);
    SELECT count(*) from t1;
  }
} 64
set origsize [file size test.db]
set cksum [db eval {SELECT md5sum(a || b) FROM t1}]



do_test interrupt-2.3 {
  execsql {
    SELECT md5sum(a || b) FROM t1;
  }
} $cksum





ifcapable {explain} {
  do_test interrupt-2.5 {
    set sql {EXPLAIN SELECT max(a,b), a, b FROM t1}
    execsql $sql
    set rc [catch {db eval $sql {sqlite4_interrupt $DB}} msg]
    lappend rc $msg
  } {1 interrupted}

# changes() changed properly after update into table containing after trigger
do_test laststmtchanges-3.1 {
    catchsql {
        drop trigger r1;
        delete from t2; delete from t2;
        create trigger r1 after update on t1 for each row begin
            insert into t2 values (NULL, changes(), NULL);
            delete from t0 where oid=1 or oid=2;
            update t2 set v2=changes();
        end;
        update t1 set k=k;
        select changes();
    }
} {0 1}

# changes() changed properly after update into table containing after trigger
do_test laststmtchanges-3.1 {
    catchsql {
        drop trigger r1;
        delete from t2; delete from t2;
        create trigger r1 after update on t1 for each row begin
            insert into t2 values (NULL, changes(), NULL);
            delete from t0 where rowid=1 or rowid=2;
            update t2 set v2=changes();
        end;
        update t1 set k=k;
        select changes();
    }
} {0 1}

  expr.test
  exec.test
  exists.test
  fkey1.test fkey2.test fkey3.test fkey4.test
  func.test func2.test func3.test 
  fuzz.test fuzz2.test 
  in.test in2.test in3.test in4.test
  index2.test index3.test index4.test 
  insert.test insert2.test insert3.test insert5.test
  join.test join2.test join3.test join4.test join5.test join6.test
  keyword1.test

  limit.test
  main.test
  manydb.test
  misc5.test misc6.test
  misuse.test
  notnull.test
  null.test

  expr.test
  exec.test
  exists.test
  fkey1.test fkey2.test fkey3.test fkey4.test
  func.test func2.test func3.test 
  fuzz.test fuzz2.test 
  in.test in2.test in3.test in4.test
  index.test index2.test index3.test index4.test 
  insert.test insert2.test insert3.test insert5.test
  join.test join2.test join3.test join4.test join5.test join6.test
  keyword1.test
  laststmtchanges.test
  limit.test
  main.test
  manydb.test
  misc5.test misc6.test
  misuse.test
  notnull.test
  null.test