1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
#! /usr/bin/env python
"""It loads urlencoded rows for one trable from queue and inserts
them into actual tables, with optional partitioning.
--ini
[table_dispatcher]
job_name = test_move
src_db = dbname=sourcedb_test
dst_db = dbname=dataminedb_test
pgq_queue_name = OrderLog
logfile = ~/log/%(job_name)s.log
pidfile = ~/pid/%(job_name)s.pid
# where to put data. when partitioning, will be used as base name
dest_table = orders
# date field with will be used for partitioning
# special value: _EVTIME - event creation time
part_column = start_date
#fields = *
#fields = id, name
#fields = id:newid, name, bar:baz
# template used for creating partition tables
# _DEST_TABLE
part_template =
create table _DEST_TABLE () inherits (orders);
alter table only _DEST_TABLE add constraint _DEST_TABLE_pkey primary key (id);
grant select on _DEST_TABLE to group reporting;
"""
import sys, os, pgq, skytools
DEST_TABLE = "_DEST_TABLE"
SCHEMA_TABLE = "_SCHEMA_TABLE"
class TableDispatcher(pgq.SerialConsumer):
"""Single-table partitioner."""
def __init__(self, args):
pgq.SerialConsumer.__init__(self, "table_dispatcher", "src_db", "dst_db", args)
self.part_template = self.cf.get("part_template", '')
self.dest_table = self.cf.get("dest_table")
self.part_field = self.cf.get("part_field", '')
self.part_method = self.cf.get("part_method", 'daily')
if self.part_method not in ('daily', 'monthly'):
raise Exception('bad part_method')
if self.cf.get("fields", "*") == "*":
self.field_map = None
else:
self.field_map = {}
for fval in self.cf.getlist('fields'):
tmp = fval.split(':')
if len(tmp) == 1:
self.field_map[tmp[0]] = tmp[0]
else:
self.field_map[tmp[0]] = tmp[1]
def process_remote_batch(self, src_db, batch_id, ev_list, dst_db):
# actual processing
self.dispatch(dst_db, ev_list)
def dispatch(self, dst_db, ev_list):
"""Generic dispatcher."""
# load data
tables = {}
for ev in ev_list:
row = skytools.db_urldecode(ev.data)
# guess dest table
if self.part_field:
if self.part_field == "_EVTIME":
partval = str(ev.creation_date)
else:
partval = str(row[self.part_field])
partval = partval.split(' ')[0]
date = partval.split('-')
if self.part_method == 'monthly':
date = date[:2]
suffix = '_'.join(date)
tbl = "%s_%s" % (self.dest_table, suffix)
else:
tbl = self.dest_table
# map fields
if self.field_map is None:
dstrow = row
else:
dstrow = {}
for k, v in self.field_map.items():
dstrow[v] = row[k]
# add row into table
if not tbl in tables:
tables[tbl] = [dstrow]
else:
tables[tbl].append(dstrow)
# create tables if needed
self.check_tables(dst_db, tables)
# insert into data tables
curs = dst_db.cursor()
for tbl, tbl_rows in tables.items():
skytools.magic_insert(curs, tbl, tbl_rows)
def check_tables(self, dcon, tables):
"""Checks that tables needed for copy are there. If not
then creates them.
Used by other procedures to ensure that table is there
before they start inserting.
The commits should not be dangerous, as we haven't done anything
with cdr's yet, so they should still be in one TX.
Although it would be nicer to have a lock for table creation.
"""
dcur = dcon.cursor()
for tbl in tables.keys():
if not skytools.exists_table(dcur, tbl):
if not self.part_template:
raise Exception('Dest table does not exists and no way to create it.')
sql = self.part_template
sql = sql.replace(DEST_TABLE, skytools.quote_fqident(tbl))
# we do this to make sure that constraints for
# tables who contain a schema will still work
schema_table = tbl.replace(".", "__")
sql = sql.replace(SCHEMA_TABLE, skytools.quote_ident(schema_table))
dcur.execute(sql)
dcon.commit()
self.log.info('%s: Created table %s' % (self.job_name, tbl))
if __name__ == '__main__':
script = TableDispatcher(sys.argv[1:])
script.start()
|
