brotherton-erpnext/patches/june_2012/delete_old_parent_entries.py

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from __future__ import unicode_literals
def execute():
"""delete entries of child table having parent like old_par%% or ''"""
import webnotes
res = webnotes.conn.sql("""\
select dt.name from `tabDocType` dt
where ifnull(dt.istable, 0)=1 and
exists (
select * from `tabDocField` df
where df.fieldtype='Table' and
df.options=dt.name
)""")
for r in res:
if r[0]:
webnotes.conn.sql("""\
delete from `tab%s`
where (ifnull(parent, '')='' or parent like "old_par%%") and
ifnull(parenttype, '')!=''""" % r[0])