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Merge pull request #931 from elventear/postgresql_db

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Allow change of ownership and checks for existing database
This commit is contained in:
Michael DeHaan 2012-08-23 18:41:15 -07:00
commit b3b607ff5e
1 changed files with 35 additions and 18 deletions
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53
library/postgresql_db
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@ -27,26 +27,45 @@ else:
# PostgreSQL module specific support methods.
#
def set_owner(cursor, db, owner):
query = "ALTER DATABASE %s OWNER TO %s" % (db, owner)
cursor.execute(query)
return True
def db_owned_by(cursor, db, user):
query = """SELECT * FROM pg_database JOIN pg_user ON datdba = usesysid
WHERE usename = %(user)s and datname = %(db)s"""
cursor.execute(query, {'db':db, 'user':user})
return cursor.rowcount == 1
def db_exists(cursor, db):
query = "SELECT * FROM pg_database WHERE datname=%(db)s"
cursor.execute(query, {'db': db})
return cursor.rowcount == 1
def db_delete(cursor, db):
query = "DROP DATABASE %s" % db
cursor.execute(query)
return True
if db_exists(cursor, db):
query = "DROP DATABASE %s" % db
cursor.execute(query)
return True
else:
return False
def db_create(cursor, db, owner, template, encoding):
if owner:
owner = " OWNER %s" % owner
if template:
template = " TEMPLATE %s" % template
if encoding:
encoding = " ENCODING '%s'" % encoding
query = "CREATE DATABASE %s%s%s%s" % (db, owner, template, encoding)
cursor.execute(query)
return True
if not db_exists(cursor, db):
if owner:
owner = " OWNER %s" % owner
if template:
template = " TEMPLATE %s" % template
if encoding:
encoding = " ENCODING '%s'" % encoding
query = "CREATE DATABASE %s%s%s%s" % (db, owner, template, encoding)
cursor.execute(query)
return True
elif owner and not db_owned_by(cursor, db, owner):
return set_owner(cursor, db, owner)
else:
return False
# ===========================================
# Module execution.
@ -100,12 +119,10 @@ def main():
module.fail_json(msg="unable to connect to database: %s" % e)
try:
if db_exists(cursor, db):
if state == "absent":
changed = db_delete(cursor, db)
else:
if state == "present":
changed = db_create(cursor, db, owner, template, encoding)
if state == "absent":
changed = db_delete(cursor, db)
elif state == "present":
changed = db_create(cursor, db, owner, template, encoding)
except Exception, e:
module.fail_json(msg="Database query failed: %s" % e)