Add database-postgres and delete database-mssql

database-postgres/README.md

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+# PostgreSQL sample for Kyma
+
+## Overview
+
+This sample seeds a managed PostgreSQL instance on SAP BTP with a small `orders` table. It assumes you already created a PostgreSQL Service Instance and Service Binding for your Kyma cluster. The Service Binding must produce a Kubernetes Secret containing the connection details (`hostname`, `port`, `dbname`, `username`, `password`, and optionally `sslmode`).
+
+The sample demonstrates how to:
+
+- Prepare a Kyma namespace for consuming a BTP-managed PostgreSQL instance.
+- Seed the database using a Kubernetes Job that runs `psql` against the bound instance.
+
+The SQL used to create and seed the table is stored in `app/setup.sql`. The Job definition lives in `k8s/seed-job.yaml`.
+
+## Prerequisites
+
+- SAP BTP, Kyma runtime instance
+- Existing PostgreSQL Service Instance and Service Binding that exposes a Secret in your Kyma cluster
+- [`kubectl`](https://kubernetes.io/docs/tasks/tools/install-kubectl/) configured to use the `KUBECONFIG` file downloaded from the Kyma runtime
+
+## Deploy the sample
+
+1. Create and label a `dev` namespace if it does not exist:
+
+   ```shell
+   kubectl create namespace dev
+   kubectl label namespace dev istio-injection=enabled
+   ```
+
+2. Make sure the PostgreSQL Service Binding Secret is available in the `dev` namespace. If it was created elsewhere, copy it into `dev` or recreate the binding in `dev`. Adjust the Secret name and key names in `k8s/seed-job.yaml` if they differ from your binding.
+
+3. Apply the ConfigMap and Job that seeds the database:
+
+   ```shell
+   kubectl -n dev apply -f ./k8s/seed-job.yaml
+   ```
+
+4. Wait for the Job to finish:
+
+   ```shell
+   kubectl -n dev get jobs seed-postgresql
+   ```
+
+5. (Optional) Verify the data using a temporary `psql` client Pod. Replace `postgresql-credentials` with your binding Secret name if it differs:
+
+    ```shell
+    kubectl -n dev apply -f - <<'EOF'
+    apiVersion: v1
+    kind: Pod
+    metadata:
+      name: pg-client
+    spec:
+      restartPolicy: Never
+      containers:
+      - name: psql
+        image: postgres:15
+        envFrom:
+        - secretRef:
+            name: postgresql-credentials
+        command: ["psql"]
+        args: ["-v", "ON_ERROR_STOP=1", "-c", "SELECT order_id, description, created FROM orders;"]
+    EOF
+    kubectl -n dev logs pod/pg-client
+    kubectl -n dev delete pod/pg-client
+    ```
+
+## Cleanup
+
+Delete the seeding assets if you no longer need them:
+
+```shell
+kubectl -n dev delete job seed-postgresql
+kubectl -n dev delete configmap postgresql-sample-sql
+```

database-postgres/app/setup.sql

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+CREATE TABLE IF NOT EXISTS orders (
+    order_id varchar(50) PRIMARY KEY,
+    description varchar(255),
+    created timestamptz DEFAULT NOW()
+);
+
+INSERT INTO orders (order_id, description) VALUES
+    ('10000001', 'Sample Order 1'),
+    ('10000002', 'Sample Order 2')
+ON CONFLICT (order_id) DO NOTHING;

database-postgres/k8s/seed-job.yaml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: postgresql-sample-sql
+  labels:
+    app: postgresql-sample
+data:
+  setup.sql: |-
+    CREATE TABLE IF NOT EXISTS orders (
+        order_id varchar(50) PRIMARY KEY,
+        description varchar(255),
+        created timestamptz DEFAULT NOW()
+    );
+
+    INSERT INTO orders (order_id, description) VALUES
+        ('10000001', 'Sample Order 1'),
+        ('10000002', 'Sample Order 2')
+    ON CONFLICT (order_id) DO NOTHING;
+---
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: seed-postgresql
+  labels:
+    app: postgresql-sample
+spec:
+  backoffLimit: 1
+  template:
+    spec:
+      restartPolicy: Never
+      containers:
+        - name: psql-client
+          image: postgres:15
+          env:
+            - name: PGHOST
+              valueFrom:
+                secretKeyRef:
+                  name: postgres-binding # change to your binding Secret name
+                  key: hostname
+            - name: PGPORT
+              valueFrom:
+                secretKeyRef:
+                  name: postgres-binding # change to your binding Secret name
+                  key: port
+            - name: PGDATABASE
+              valueFrom:
+                secretKeyRef:
+                  name: postgres-binding # change to your binding Secret name
+                  key: dbname
+            - name: PGUSER
+              valueFrom:
+                secretKeyRef:
+                  name: postgres-binding # change to your binding Secret name
+                  key: username
+            - name: PGPASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: postgres-binding # change to your binding Secret name
+                  key: password
+            - name: PGSSLMODE
+              valueFrom:
+                secretKeyRef:
+                  name: postgres-binding # change to your binding Secret name
+                  key: sslmode
+                  optional: true
+          volumeMounts:
+            - name: sql
+              mountPath: /init
+          command: ["psql"]
+          args:
+            ["-v", "ON_ERROR_STOP=1", "-f", "/init/setup.sql"]
+      volumes:
+        - name: sql
+          configMap:
+            name: postgresql-sample-sql