feat: add bin/join-rts-srvcs-trps.sh

bin/join-rts-srvcs-trps.sh

@@ -0,0 +1,22 @@
+#!/bin/sh
+#
+echo "Started..."
+#Started...
+#
+# special variable $# is the number of arguments
+if [ $# -lt 3 ] ; then
+    echo 'Call ./<script> <db name> <db user> <db schema>'
+    exit 1
+fi
+#
+DB_NAME="$1"
+echo "DB_NAME: ${DB_NAME}"
+DB_USER="$2"
+echo "DB_USER: ${DB_USER}"
+DB_SCHEMA="$3"
+echo "DB_SCHEMA: ${DB_SCHEMA}"
+#
+psql -h localhost -p 5432 -U $DB_USER -f ./sql/join-rts-srvcs-trps.sql -d $DB_NAME -v schema=$DB_SCHEMA
+#
+echo "Done."
+#done.

sql/join-rts-srvcs-trps.sql

@@ -0,0 +1,9 @@
+-- colon before variable: for a prepared statement using named placeholders, this will be a parameter name of the form :name
+
+CREATE SCHEMA IF NOT EXISTS :schema;
+SET search_path to :schema, public;
+
+---create view
+CREATE OR REPLACE VIEW :schema.vw_join_rts_trps_srvcs AS
+
+SELECT rts.route_id, rts.route_short_name, rts.route_long_name, trps.service_id, trps.trip_id, trps.trip_short_name, trps.trip_headsign, srvcs.dates FROM :schema.trips AS trps LEFT JOIN :schema.routes AS rts ON trps.route_id = rts.route_id LEFT JOIN :schema.services AS srvcs ON trps.service_id = srvcs.service_id ORDER BY rts.route_id, trps.trip_id;