Archived:How to use SQL on DBMS database with PySymbian

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Created: cyke64 (15 Mar 2007)

Last edited: hamishwillee (31 May 2013)

This article shows how to access DBMS, the native Symbian database, from PySymbian. The module used is e32db.

import e32db
db = e32db.Dbms()
dbv = e32db.Db_view()
db.open(u'C:\\system\\data\\bookmarks1.db')  # open database file
 
# search and retrieve from a row
def select_row(query):
  dbv.prepare(db, unicode(query))
  dbv.first_line()
  dbv.get_line()
  result = []
  for i in range(dbv.col_count()):
    result.append(dbv.col(i+1))
  return result
 
# search and retrieve from a column
def select_col(query):
  dbv.prepare(db, unicode(query))
  dbv.first_line()
  result = []
  for i in range(dbv.count_line()):
    dbv.get_line()
    result.append(dbv.col(1))
    dbv.next_line()
  return result
 
def select_all(query):
    dbv.prepare(db, unicode(query))
    dbv.first_line()
    rows = []
    for i in range(dbv.count_line()):
        dbv.get_line()
        result = []
        for i in range(dbv.col_count()):
            try:
                result.append(dbv.col(i+1))
            except:    # in case coltype 16
                result.append(None)
        rows.append(result)
        dbv.next_line()
    return rows

Now you can simply call

select_row('SELECT * FROM Favourites')  # 1 row
select_all('SELECT * FROM Favourites')  # all rows
 
 
# For non-select SQL, you can simply use db.execute(query).