added torque query script

sql/torque_query.py

@@ -0,0 +1,51 @@
+import sys;
+
+tile_sql = """
+WITH par AS (
+    WITH innerpar AS (
+        SELECT 1.0/(CDB_XYZ_Resolution({zoom})*{resolution}) as resinv
+    ),
+    bounds AS (
+        SELECT min({column_conv}) as start, (max({column_conv}) - min({column_conv}) )/{steps} step 
+        FROM ({_sql}) _i
+    )
+    SELECT CDB_XYZ_Resolution({zoom})*{resolution} as res, innerpar.resinv as resinv, start, step FROM innerpar, bounds
+)
+select
+   floor(st_x(i.{gcol})*resinv) as xx,
+   floor(st_y(i.{gcol})*resinv) as yy
+   , {countby} c
+   , floor(({column_conv} - start)/step) d
+    FROM ({_sql}) i, par p
+    GROUP BY xx, yy, d
+
+"""
+
+if len(sys.argv) != 6:
+    print "python torque_query.py zoom resolution time_column steps table"
+    print "example: "
+    print """python torque_query.py 14 1 "date_part('epoch', date)" 512 "select * from ships" """
+
+    sys.exit()
+
+zoom=int(sys.argv[1])
+for x in xrange(zoom):
+    mat = "DROP MATERIALIZED VIEW IF EXISTS table_zoom_%d ;\n" % x
+    mat += "create materialized view table_zoom_%d as " % x
+
+    mat += tile_sql.format(
+        zoom=x,
+        resolution=int(sys.argv[2]),
+        gcol='the_geom_webmercator',
+        column_conv=sys.argv[3],
+        steps=int(sys.argv[4]),
+        _sql=sys.argv[5],
+        countby='count(cartodb_id)'
+    )
+
+    mat +=";"
+
+    print mat
+
+
+