updated description of database preparation

README.md

@@ -56,12 +56,21 @@ energy-consumption-ingester/
 4. **Set up PostgreSQL database:**
 
    ```bash
-   # Create database
-   createdb energy_consumption
+   # Connect to Postgres14 host
+   psql -U <POSTGRES_ADMIN> -h <POSTGERS_HOST> -p <POSTGERS_PORT>
 
-   # Create user (optional - run the script)
-   chmod +x scripts/create_db_user.sh
-   ./scripts/create_db_user.sh
+   # Create database user
+   CREATE USER <DB_USER> WITH PASSWORD <DB_PASSWORD>;
+
+   # Create database
+   CREATE DATABASE <DB_NAME>;
+
+   # Grant full privileges on database to user
+   GRANT ALL PRIVILEGES ON DATABASE <DB_NAME> TO <DB_USER>;
+
+   # (Optional) verify new user and database creation
+   \q
+   psql -U <DB_USER> -h <POSTGRES_HOST> -p <POSTGERS_PORT>
    ```
 
 ## Configuration

scripts/create_db_user.sh

@@ -1,42 +0,0 @@
-#!/bin/bash
-set -e # Exit immediately if a command exits with a non-zero status.
-
-# --- 1. Set up Connection Variables ---
-HOST=$POSTGRES_HOST
-PORT=$POSTGRES_PORT
-DB_NAME=$NEW_DB_NAME
-DB_USER=$NEW_DB_USER
-DB_PASSWORD=$NEW_DB_PASSWORD
-
-# --- 2. Build the SQL Commands ---
-# NOTE: The IF NOT EXISTS ensures the script can be run safely multiple times.
-SQL_COMMANDS=$(cat <<-END_SQL
-    -- Create user role with login and password
-    DO
-    \$body\$
-    BEGIN
-        IF NOT EXISTS (
-            SELECT
-            FROM   pg_catalog.pg_user
-            WHERE  usename = '$DB_USER') THEN
-            CREATE ROLE $DB_USER WITH LOGIN PASSWORD '$DB_PASSWORD';
-        END IF;
-    END
-    \$body\$;
-
-    -- Create database owned by the new user (if it doesn't exist)
-    SELECT 'CREATE DATABASE $DB_NAME OWNER $DB_USER'
-    WHERE NOT EXISTS (SELECT FROM pg_database WHERE datname = '$DB_NAME')\gexec
-END_SQL
-)
-
-# --- 3. Execute the SQL Commands ---
-echo "Attempting to connect to $HOST to execute SQL..."
-echo "$SQL_COMMANDS" | psql \
-    --host=$HOST \
-    --port=$PORT \
-    --username=$POSTGRES_ADMIN_USER \
-    --dbname=postgres \
-    --set ON_ERROR_STOP=on
-
-echo "PostgreSQL database '$DB_NAME' and user '$DB_USER' created/verified successfully."