initial commit of v5

deployment/postgres/init.sql

@@ -0,0 +1,46 @@
+-- Enable pg_stat_statements extension
+CREATE EXTENSION IF NOT EXISTS pg_stat_statements;
+
+-- Enable other useful extensions
+CREATE EXTENSION IF NOT EXISTS "uuid-ossp";      -- UUID generation
+CREATE EXTENSION IF NOT EXISTS "pgcrypto";       -- Cryptographic functions
+CREATE EXTENSION IF NOT EXISTS "btree_gin";      -- GIN indexes for btree types
+CREATE EXTENSION IF NOT EXISTS "btree_gist";     -- GIST indexes for btree types
+
+-- Create a function to reset pg_stat_statements (useful for debugging)
+CREATE OR REPLACE FUNCTION reset_query_stats()
+RETURNS void AS $$
+BEGIN
+    PERFORM pg_stat_statements_reset();
+END;
+$$ LANGUAGE plpgsql;
+
+-- Create a view for easier query analysis
+CREATE OR REPLACE VIEW slow_queries AS
+SELECT
+    query,
+    calls,
+    ROUND(total_exec_time::numeric, 2) AS total_time_ms,
+    ROUND(mean_exec_time::numeric, 2) AS mean_time_ms,
+    ROUND(max_exec_time::numeric, 2) AS max_time_ms,
+    ROUND((100 * total_exec_time / SUM(total_exec_time) OVER ())::numeric, 2) AS percentage,
+    rows
+FROM pg_stat_statements
+ORDER BY total_exec_time DESC;
+
+-- Create a view for most frequent queries
+CREATE OR REPLACE VIEW frequent_queries AS
+SELECT
+    query,
+    calls,
+    ROUND(mean_exec_time::numeric, 2) AS mean_time_ms,
+    ROUND(total_exec_time::numeric, 2) AS total_time_ms,
+    rows
+FROM pg_stat_statements
+ORDER BY calls DESC;
+
+-- Notification for successful initialization
+DO $$
+BEGIN
+    RAISE NOTICE 'Database initialized with pg_stat_statements and helper views';
+END $$;