add docs for polaris catalog

content/en/user-guide/init-hooks/index.md

@@ -1,7 +1,7 @@
 ---
 title: "Initialization Hooks"
 linkTitle: "Initialization Hooks"
-weight: 17
+weight: 19
 description: Writing SQL scripts to initialize your Snowflake emulator
 ---
 

content/en/user-guide/polaris-catalog/index.md

@@ -0,0 +1,119 @@
+---
+title: "Polaris Catalog"
+linkTitle: "Polaris Catalog"
+weight: 18
+description: Get started with Polaris Catalog in LocalStack for Snowflake
+---
+
+{{< preview-notice >}}
+
+## Introduction
+
+Polaris Catalog is a unified data catalog that provides a single view of all your data assets across Snowflake and external sources. It enables you to discover, understand, and govern your data assets, making it easier to find and use the right data for your analytics and machine learning projects.
+
+The Snowflake emulator supports creating Iceberg tables with Polaris catalog. Currently, [`CREATE CATALOG INTEGRATION`](https://docs.snowflake.com/en/sql-reference/sql/create-catalog-integration-open-catalog) is supported by LocalStack.
+
+## Getting started
+
+This guide is designed for users new to Iceberg tables with Polaris catalog and assumes basic knowledge of SQL and Snowflake. Start your Snowflake emulator and connect to it using an SQL client in order to execute the queries further below.
+
+In this guide, you will create an Iceberg table, display the data in the Iceberg table, and drop the Iceberg table.
+
+### Create an Iceberg table
+
+You can create an Iceberg table using the `CREATE ICEBERG TABLE` statement. In this example, you can create an external volume called `v_demo`:
+
+```sql
+CREATE OR REPLACE EXTERNAL VOLUME v_demo
+  STORAGE_LOCATIONS = (
+    (
+      NAME = 'aws-s3-test'
+      STORAGE_PROVIDER = 'S3'
+      STORAGE_BASE_URL = 's3://testbucket/'
+      STORAGE_AWS_ROLE_ARN = '000000000000'
+      ENCRYPTION=(TYPE='AWS_SSE_S3')
+    )
+  )
+  ALLOW_WRITES = TRUE;
+```
+
+### Create a Catalog integration
+
+You can then create a Catalog integration using the `CREATE CATALOG INTEGRATION` statement. In this example, you can create a catalog integration called `catalog_demo`:
+
+```sql
+CREATE CATALOG INTEGRATION catalog_demo
+CATALOG_SOURCE=ICEBERG_REST
+TABLE_FORMAT=ICEBERG
+CATALOG_NAMESPACE='test_namespace'
+REST_CONFIG=(
+    CATALOG_URI='http://localhost:8181'
+    CATALOG_NAME='polaris'
+)
+REST_AUTHENTICATION=(
+    TYPE=OAUTH
+    OAUTH_CLIENT_ID='root'
+    OAUTH_CLIENT_SECRET='s3cr3t'
+    OAUTH_ALLOWED_SCOPES=(PRINCIPAL_ROLE:ALL)
+)
+ENABLED=TRUE
+REFRESH_INTERVAL_SECONDS=60
+COMMENT='Test catalog integration';
+```
+
+### Create an Iceberg table
+
+You can create an Iceberg table using the `CREATE ICEBERG TABLE` statement. In this example, you can create an Iceberg table called `t_demo`:
+
+```sql
+CREATE ICEBERG TABLE t_demo (c1 TEXT)
+CATALOG='catalog_demo', EXTERNAL_VOLUME='v_demo', BASE_LOCATION='test/test_namespace';
+```
+
+The output should be:
+
+```sql
++-------------------------------------------+                                    
+| status                                    |
+|-------------------------------------------|
+| Table "t_demo" successfully created.      |
++-------------------------------------------+
+```
+
+### Show Iceberg tables
+
+You can display the Iceberg tables using a `SELECT` query:
+
+```sql
+SELECT * FROM t_demo;
+```
+
+The output should be:
+
+```sql
++----------+
+| c1       |
+|----------|
+| iceberg  |
+| foobar   |
+| test     |
++----------+
+```
+
+### Drop Iceberg table
+
+You can drop the Iceberg table using the `DROP ICEBERG TABLE` statement:
+
+```sql
+DROP ICEBERG TABLE t_demo;
+```
+
+The output should be:
+
+```sql
++-------------------------------------------+  
+| status                                    |
+| ------------------------------------------+
+| T_DEMO successfully dropped.              |
++-------------------------------------------+
+```