refs #730: add ADB PostgreSQL federation recording scripts

sql/adb/73_hmm_rds_pg_00_precheck.sql

@@ -0,0 +1,32 @@
+-- ============================================================
+-- HMM ADB -> AWS RDS PostgreSQL federation demo
+-- Step 0: precheck
+-- Run in Database Actions SQL Worksheet as ADMIN.
+-- Redmine: #730
+-- ============================================================
+
+SELECT
+  USER AS session_user,
+  SYS_CONTEXT('USERENV', 'CURRENT_SCHEMA') AS current_schema,
+  SYS_CONTEXT('USERENV', 'DB_NAME') AS database_name
+FROM dual;
+
+SELECT credential_name, username
+FROM all_credentials
+WHERE credential_name = 'HMM_RDS_PG_CRED';
+
+SELECT db_link, username, host, created
+FROM user_db_links
+WHERE db_link = 'HMM_RDS_PG_LINK';
+
+SELECT object_name, object_type, status
+FROM user_objects
+WHERE object_name IN (
+  'HMM_RDS_CARRIERS_V',
+  'HMM_RDS_CARRIER_PERF_V',
+  'HMM_RDS_CARRIER_LATEST_V'
+)
+ORDER BY object_name;
+
+-- First recording: the last three queries should return no rows.
+-- If objects already exist, run 80_hmm_rds_pg_99_cleanup.sql first.