create dates table as part of feeding (fixes #14961)

README.rst

@@ -24,13 +24,3 @@ cube.
           --key KEY        HMAC key for signatures
           --pg-dsn PG_DSN  Psycopg2 DB DSN
           --schema SCHEMA  schema name
-
-Dates measure
-=============
-
-All date field are joined with a main date table in order to have measure on
-date with no facts. You must create this table in the public schema of your
-database so that it is shared with all the w.c.s. instance's schemas. For this
-use the script create_dates.sql.::
-
-        psql -f create_dates.sql wcs-olap

create_dates.sql

@@ -1,9 +0,0 @@
--- Crée une table de dates entre 2010 et 2020
-DROP TABLE IF EXISTS dates;
-CREATE TABLE dates AS (SELECT
-        the_date.the_date::date AS date,
-        to_char(the_date.the_date, 'TMday') AS day,
-        to_char(the_date.the_date, 'TMmonth') AS month
-    FROM
-        generate_series('2010-01-01'::date, '2020-01-01'::date, '1 day'::interval)
-    AS the_date(the_date));

wcs_olap/feeder.py

@@ -268,6 +268,20 @@ class WcsOlapFeeder(object):
         self.ex('CREATE SCHEMA {schema_temp}')
         self.ex('SET search_path = {schema_temp},public')
 
+    def do_dates_table(self):
+        # test if public.dates exists
+        self.ex("SELECT * FROM information_schema.tables WHERE table_name = 'dates' AND"
+                " table_schema = 'public'")
+        if len(list(self.cur.fetchall())) < 1:
+            self.ex('''
+CREATE TABLE public.dates AS (SELECT
+        the_date.the_date::date AS date,
+        to_char(the_date.the_date, 'TMday') AS day,
+        to_char(the_date.the_date, 'TMmonth') AS month
+    FROM
+        generate_series('2010-01-01'::date, '2020-01-01'::date, '1 day'::interval)
+    AS the_date(the_date));''')
+
     channels = [
         [1, 'web', u'web'],
         [2, 'mail', u'courrier'],
@@ -397,6 +411,7 @@ class WcsOlapFeeder(object):
         try:
             if self.do_feed:
                 self.do_schema()
+                self.do_dates_table()
                 self.do_base_table()
             for formdef in self.formdefs:
                 self.api.cache = {}