# JOIN POLICY

Config path: `/<database>/<schema>/join_policy/<name>.yaml`

Example:

```yaml
body: |-
  CASE
    WHEN IS_ROLE_IN_SESSION('SYSADMIN')
    THEN JOIN_CONSTRAINT(JOIN_REQUIRED => FALSE)
    ELSE JOIN_CONSTRAINT(JOIN_REQUIRED => TRUE)
  END

```

## Schema

* <mark style="background-color:red;">**body**</mark> (str) - policy SQL expression
* **comment** (str)&#x20;

## Usage notes

1. Management of join policies requires active warehouse due to unavoidable [POLICY\_REFERENCES](https://docs.snowflake.com/en/sql-reference/functions/policy_references.html) table function calls.
2. Row access policies always return `JOIN_CONSTRAINT`.

## Links

* [CREATE JOIN POLICY](https://docs.snowflake.com/en/sql-reference/sql/create-join-policy)
* [SHOW JOIN POLICIES](https://docs.snowflake.com/en/sql-reference/sql/show-join-policies)
* [DESC JOIN POLICY](https://docs.snowflake.com/en/sql-reference/sql/desc-join-policy)
* [Parser & JSON Schema (GitHub)](https://github.com/littleK0i/SnowDDL/blob/master/snowddl/parser/join_policy.py)


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