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| --- | ||
| title: "Dgraph" | ||
| type: docs | ||
| description: > | ||
| Dgraph is a horizontally scalable and distributed graph database. | ||
| --- | ||
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| ## About | ||
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| [Dgraph][dgraph-docs] is a horizontally scalable and distributed graph database. | ||
| It provides ACID transactions, consistent replication, and linearizable reads. | ||
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| This source can connect to either a self-managed Dgraph cluster or one hosted on Dgraph Cloud. | ||
| If you're new to Dgraph, the fastest way to get started is to [sign up for Dgraph Cloud][dgraph-login]. | ||
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| [dgraph-docs]: https://dgraph.io/docs | ||
| [dgraph-login]: https://cloud.dgraph.io/login | ||
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| ## Requirements | ||
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| ### Database User | ||
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| When **connecting to a hosted Dgraph database**, this source uses the API key for access. If you are using a dedicated environment, you will additionally need the namespace and user credentials for that namespace. | ||
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| For **connecting to a local or self-hosted Dgraph database**, use the namespace and user credentials for that namespace. | ||
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| ## Example | ||
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| ```yaml | ||
| sources: | ||
| my-dgraph-source: | ||
| dgraphUrl: "https://xxxx.cloud.dgraph.io" | ||
| user: "groot" | ||
| password: "password" | ||
| apiKey: abc123 | ||
| namepace : 0 | ||
| ``` | ||
| ## Reference | ||
| | **Field** | **Type** | **Required** | **Description** | | ||
| |-------------|:--------:|:------------:|--------------------------------------------------------------------------------------------------| | ||
| | kind | string | true | Must be "dgraph". | | ||
| | dgraphurl | string | true | Connection URI (e.g. "https://xxx.cloud.dgraph.io", "https://localhost:8080"). | | ||
| | user | string | false | Name of the Dgraph user to connect as (e.g., "groot"). | | ||
| | password | string | false | Password of the Dgraph user (e.g., "password"). | | ||
| | apiKey | string | false | API key to connect to a Dgraph Cloud instance. | | ||
| | namespace | uint64 | false | Dgraph namespace (not required for Dgraph Cloud Shared Clusters). | |
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| # Dgraph DQL Tool | ||
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| A "dgraph-dql" tool executes a pre-defined DQL statement against a Dgraph database. It's compatible with any of the following | ||
| sources: | ||
| - [dgraph](../sources/dgraph.md) | ||
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| To run a statement as a query, you need to set the config isQuery=true. For upserts or mutations, set isQuery=false. | ||
| You can also configure timeout for a query. | ||
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| ## Example | ||
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| ### Query: | ||
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| ```yaml | ||
| tools: | ||
| search_user: | ||
| kind: dgraph-dql | ||
| source: dgraph-user-instance | ||
| statement: | | ||
| query all($role: string){ | ||
| users(func: has(name)) @filter(eq(role, $role) AND ge(age, 30) AND le(age, 50)) { | ||
| uid | ||
| name | ||
| role | ||
| age | ||
| } | ||
| } | ||
| isQuery: true | ||
| timeout: 20s | ||
| description: | | ||
| Use this tool to retrieve the details of users who are admins and are between 30 and 50 years old. | ||
| The query returns the user's name, email, role, and age. | ||
| This can be helpful when you want to fetch admin users within a specific age range. | ||
| Example: Fetch admins aged between 30 and 50: | ||
| [ | ||
| { | ||
| "name": "Alice", | ||
| "role": "admin", | ||
| "age": 35 | ||
| }, | ||
| { | ||
| "name": "Bob", | ||
| "role": "admin", | ||
| "age": 45 | ||
| } | ||
| ] | ||
| parameters: | ||
| - name: $role | ||
| type: string | ||
| description: admin | ||
| ``` | ||
| ### Mutation: | ||
| ```yaml | ||
| tools: | ||
| dgraph-manage-user-instance: | ||
| kind: dgraph-dql | ||
| source: dgraph-manage-user-instance | ||
| isQuery: false | ||
| statement: | | ||
| { | ||
| set { | ||
| _:user1 <name> $user1 . | ||
| _:user1 <email> $email1 . | ||
| _:user1 <role> "admin" . | ||
| _:user1 <age> "35" . | ||
| _:user2 <name> $user2 . | ||
| _:user2 <email> $email2 . | ||
| _:user2 <role> "admin" . | ||
| _:user2 <age> "45" . | ||
| } | ||
| } | ||
| description: | | ||
| Use this tool to insert or update user data into the Dgraph database. | ||
| The mutation adds or updates user details like name, email, role, and age. | ||
| Example: Add users Alice and Bob as admins with specific ages. | ||
| parameters: | ||
| - name: $user1 | ||
| type: string | ||
| description: Alice | ||
| - name: $email1 | ||
| type: string | ||
| description: alice@email.com | ||
| - name: $user2 | ||
| type: string | ||
| description: Bob | ||
| - name: $email2 | ||
| type: string | ||
| description: bob@email.com | ||
| ``` | ||
| ## Reference | ||
| | **field** | **type** | **required** | **description** | | ||
| |-------------|----------:|:------------:|----------------------------------------------------------------------------------------------------| | ||
| | kind | string | true | Must be "dgraph-dql". | | ||
| | source | string | true | Name of the source the dql query should execute on. | | ||
| | description | string | true | Description of the tool | | ||
| | statement | string | true | dql statement to execute | | ||
| | isQuery | boolean | false | To run statment as query set true otherwise false | | ||
| | timeout | string | false | To set timout for query | | ||
| | parameters | parameter | true | List of [parameters](README.md#specifying-parameters) that will be used with the dql statement. | |
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