## Executing a DBM Command

In this example you use the cmd method of the sdb.sql module. You execute the DBM command db_enum (display list of all registered database instances) and format the output.

### Procedure

...

1. Create a Python script sample.py with the following contents:

# Import Python modules

# ----------------------------

import sys

import sdb.dbm

#

# Call the Database Manager and log on to the database instance

# ------------------------------------------------------

session = sdb.dbm.DBM ()

# Execute DBM command db_enum (display list of all registered

# database instances)

# Result: character string

output = session.cmd ('db_enum')

dbstate = 'offline'

lastdb = ''

# Separate result with line breaks.

for line in output.split ('\n'):

if not line:

continue

# Data fields are separated by tab characters.

database_name, installation_path, version, kernel_variant, operational_state = line.split ('\t')

if database_name != lastdb:

# Several lines exist for each database instance,

# one for each of the following kernel variants:

# fast, slow and test.

if lastdb != '':

print lastdb, '\t', dbstate

lastdb = database_name

dbstate = 'offline'

# The database is in operation if one of the kernel variants

# is displayed as 'running'.

if operational_state == 'running':

dbstate = operational_state

print lastdb, '\t', dbstate

2. Call the Python script:

python sample.py

DEMODB running

TESTDB offline

See also:

Examples for the sdb.dbm Module