Using data integrations in batch pipelines (in Beta)

Available in version 0.9.35 and greater.

Overview

You can use a data integration source (e.g. Stripe) and/or a data integration destination (e.g. Trino) as a block in batch pipelines.

Why is this important?

Combine the low-code aspect and capabilities of data integrations with the flexibility and dynamic capabilities of a batch pipeline.

Example

Use a Python data loader block to write custom code for fetching Stripe credentials.
Use a SQL data loader block to fetch data from a table in PostgreSQL.
Add a data integration source block to fetch data from Stripe.
Use the output from the Python data loader block and interpolate the Stripe credentials into the data integration source block.
Add a Python transformer block to merge, clean, and aggregate data fetched from PostgreSQL and Stripe.
Add a data integration destination block that writes the output data from the Python transformer block and export it to SalesForce.

The image below doesn’t reflect the above example exactly.

The image shows a different set of blocks than the example above.

Features

Use any data integration source.
Use any data integration destination.
Sources and destinations have capabilities of a normal Python block in a batch pipeline.
Dynamically calculate the source and destination credentials at runtime.
Dynamically build the source and destination catalog schema at runtime.
Source blocks can output its fetched data to any downstream block.
Any block can output its data to a destination block and have it exported to that destination.
Support incremental sync
[Coming soon] Support log based sync.
[Coming soon] Replicate source and destination blocks.
[Coming soon] Support source and destination blocks as dynamic blocks.

How to use

Go to the project preferences and enable the feature labeled Data integration in batch pipeline.
Create a new batch pipeline.
Add a new Data loader block by selecting:
1. Templates →
2. Data loader →
3. Sources →
4. Select the source to add to the pipeline.
Configure the source:
1. Add credentials.
2. Select 1 or more streams to sync.
3. Setup stream settings.
4. Select 1 or more columns to sync from stream.
Add a new Data exporter block by selecting:
1. Templates →
2. Data exporter →
3. Destinations →
4. Select the source to add to the pipeline.
Configure the destination:
1. Add credentials.
2. Select 1 or more stre.ams to export.
3. Setup stream settings.
4. Select 1 or more columns to include in the destination table when exporting stream.

Configure source and destination

For more information on how to configure and setup a data integration source and destination, refer back to the original data integration guide.

Credentials

Upstream block settings

Select streams

Streams overview with bulk editing

Stream detail overview

For more information on how to configure settings for a stream, refer back to the original data integration guide.

Stream detail schema properties with bulk editing

For more information on how to configure schema properties for a stream, refer back to the original data integration guide.

Stream detail sample data

Python blocks

When adding a data integration source or destination block to a batch pipeline, you can choose the language to be YAML or Python (default option is YAML).

If you choose Python as the language, you programmatically define the following settings of the data integration:

Configuration	Example	Decorator	Description
Source	`stripe`	`@data_integration_source`	The source to load data from.
Destination	`salesforce`	`@data_integration_destination`	The destination to export data to.
Config	`database='...'`	`@data_integration_config`	A dictionary containing the credentials and other settings specific to the source or destination.
Selected streams	`['account']`	`@data_integration_selected_streams`	A list of stream names to be selected from the catalog.
Catalog	`{...}`	`@data_integration_catalog`	A dictionary containing a list of streams and the stream’s settings, schema properties, and metadata.

`@data_integration_source`

This decorated function is required.

@data_integration_source
def source(*args, **kwargs) -> str:
    return 'postgresql'

`@data_integration_destination`

This decorated function is required.

@data_integration_destination
def destination(*args, **kwargs) -> str:
    return 'postgresql'

`@data_integration_config`

This decorated function is required.

@data_integration_config
def config(*args, **kwargs) -> Dict:
    destination: str = kwargs.get('destination', None)
    return {
        'database': '',
        'host': '',
        'password': '',
        'port': 5432,
        'schema': '',
        'table': '',
        'username': '',
    }

Keyword arguments inside the decorated function

The following keyword arguments are only available in the decorated function’s body for sources.


Keyword	`source`
Sample code	`kwargs['source']`
Return value type	`str`
Sample return value	`'postgresql'`
Description	The name of the source
Available in	Sources only


Keyword	`destination`
Sample code	`kwargs['destination']`
Return value type	`str`
Sample return value	`'postgresql'`
Description	The name of the destination
Available in	Destinations only

`@data_integration_selected_streams`

This decorated function is optional.

@data_integration_selected_streams(discover_streams: bool = False)
def selected_streams(*args, **kwargs) -> List[str]:
    config: Dict = kwargs.get('config', None)
    discover_streams_func: Callable = kwargs.get('discover_streams_func', None)
    source: str = kwargs.get('source', None)

    return []

Decorator arguments

The following arguments are only available in the decorator @data_integration_selected_streams for sources.


Argument	`discover_streams`
Argument values	`False`, `True`
Description	If `True`, there will be a list of stream names available in the function’s body via the keyword argument `selected_streams`; e.g. `kwargs['selected_streams']`. This list of stream names are retrieved by the source’s underlying code in the Mage Integrations library.
Available in	Sources only

Keyword arguments inside the decorated function

The following keyword arguments are only available in the decorated function’s body.


Keyword	`source`
Sample code	`kwargs['source']`
Return value type	`str`
Sample return value	`'postgresql'`
Description	The name of the source
Available in	Sources only


Keyword	`destination`
Sample code	`kwargs['destination']`
Return value type	`str`
Sample return value	`'postgresql'`
Description	The name of the destination
Available in	Destinations only


Keyword	`config`
Sample code	`kwargs['config']`
Return value type	`dict`
Sample return value	`{ 'database': '...' }`
Description	The dictionary containing the credentials and other configurations.
Available in	Sources and destinations


Keyword	`selected_streams`
Sample code	`kwargs['selected_streams']`
Return value type	`List[str]`
Sample return value	`['account', 'users']`
Description	A list of strings containing all the available stream names for the source. This is only available if `discover_streams` is `True`.
Available in	Sources only


Keyword	`discover_streams_func`
Sample code	`kwargs['discover_streams_func']`
Return value type	`Callable`
Sample return value	If function is invoked, the return value is the same as `selected_streams` above.
Description	A list of stream names are retrieved by the source’s underlying code in the Mage Integrations library.
Available in	Sources only

`@data_integration_catalog`

The returned dictionary will override the catalog setup through the user interface.

@data_integration_catalog(discover: bool = False, select_all: bool = True)
def catalog(*args, **kwargs) -> Dict:
    config: Dict = kwargs.get('config', None)
    selected_streams: List[str] = kwargs.get('selected_streams', None)
    source: str = kwargs.get('source', None)

    # catalog_from_discover is None unless discover=True
    catalog_from_discover: Dict = kwargs.get('catalog', None)

    # Executing this function will fetch and return the catalog
    discover_func: Callable = kwargs.get('discover_func', None)

    return {
        'streams': [],
    }

Decorator arguments

The following arguments are only available in the decorator @data_integration_catalog for sources.


Argument	`discover`
Argument values	`False`, `True`
Description	If `True`, the source will fetch the catalog and all stream schema properties then pass the returned value to the decorated function’s keyword arguments.
Available in	Sources only


Argument	`select_all`
Argument values	`True`, `False`
Description	If `False`, the streams in the catalog won’t be selected by default and you’ll have to manually select the stream via the stream’s metadata.
Available in	Sources only

Keyword arguments inside the decorated function

The following keyword arguments are only available in the decorated function’s body.


Keyword	`source`
Sample code	`kwargs['source']`
Return value type	`str`
Sample return value	`'postgresql'`
Description	The name of the source
Available in	Sources only


Keyword	`destination`
Sample code	`kwargs['destination']`
Return value type	`str`
Sample return value	`'postgresql'`
Description	The name of the destination
Available in	Destinations only


Keyword	`config`
Sample code	`kwargs['config']`
Return value type	`dict`
Sample return value	`{ 'database': '...' }`
Description	The dictionary containing the credentials and other configurations.
Available in	Sources and destinations


Keyword	`selected_streams`
Sample code	`kwargs['selected_streams']`
Return value type	`List[str]`
Sample return value	`['account', 'users']`
Description	A list of strings containing the available stream names returned from the decorated function under `@data_integration_selected_streams`.
Available in	Sources and destinations


Keyword	`catalog`
Sample code	`kwargs['catalog']`
Return value type	`dict`
Sample return value	`{ 'streams': [] }`
Description	A dictionary with a key named `streams` that is a list of dictionaries containing the stream schema properties and metadata. This is only available if `discover` is `True`.
Available in	Sources only


Keyword	`discover_func`
Sample code	`kwargs['discover_func']`
Return value type	`Callable`
Sample return value	If function is invoked, the return value is the same as `catalog` above.
Description	If function is invoked, the source will fetch the catalog and all stream schema properties.
Available in	Sources only

Data from upstream blocks

The data integration source and destination block can depend on upstream blocks.

Those upstream blocks can pass its output data into the data integration source and destination, which then can be used as:

Input arguments to interpolate information in the credentials (or other decorated functions if source or destination block is a Python block).
Data to be exported to a destination.

Input arguments

Follow these steps to use the output of an upstream block as an input:

Open the data integration block’s configuration and click on the tab labeled Upstream block settings.
Toggle the name of the block you want as an input.
Check the box labeled Use the block’s output data as an input.

Inputs are available as positional arguments for all decorated functions in Python blocks.

Other options

Examples using upstream data output as inputs

If you have an upstream block, named pg_credentials, that has the following code:

@custom
def get_credentials(*args, **kwargs):
    return dict(
        database='dangerous',
        host='host.docker.internal',
        password='postgres',
        port=5432,
        schema='mage',
        username='postgres',
    )

Here are examples on how to use the upstream block’s output to configure credentials at runtime:

If you have a data integration source or destination block that depends on the above upstream block, you can interpolate the output of the upstream block in the source or destination block’s credentials like this:

database: |
  {{ block_output('pg_credentials', parse='lambda x: x["database"]') }}
host: |
  {{ block_output('pg_credentials', parse='lambda x: x["host"]') }}
password: |
  {{ block_output('pg_credentials', parse='lambda x: x["password"]') }}
port: |
  {{ block_output('pg_credentials', parse='lambda x: x["port"]') }}
schema: |
  {{ block_output('pg_credentials', parse='lambda x: x["schema"]') }}
username: |
  {{ block_output('pg_credentials', parse='lambda x: x["username"]') }}

Depending on how many upstream blocks your source or destination block uses as an input, it’ll determine how many positional arguments are available in any of your decorated functions.

@data_integration_config
def config(credentials, *args, **kwargs) -> Dict:
    return {
        'database': credentials['database'],
        'host': credentials['host'],
        'password': credentials['password'],
        'port': credentials['port'],
        'schema': credentials['schema'],
        'username': credentials['username'],
    }

Examples using upstream block’s catalog as input

If you have an upstream block, named titanic_survival, that has the following code:

import io
import pandas as pd
import requests


@data_loader
def load_data_from_api(*args, **kwargs):
    url = 'https://raw.githubusercontent.com/mage-ai/datasets/master/titanic_survival.csv'
    response = requests.get(url)
    return pd.read_csv(io.StringIO(response.text), sep=',')

And its output data has the following Pandas data types:

Column	Data type	Sample data
PassengerId	`int64`	2
Survived	`int64`	1
Pclass	`int64`	1
Name	`object`	Mrs. John Bradley (Florence Briggs Thayer)
Sex	`object`	female
Age	`float64`	38
SibSp	`int64`	1
Parch	`int64`	0
Ticket	`object`	PC 17599
Fare	`float64`	71.2833
Cabin	`object`	C85
Embarked	`object`	C

Here are examples on how to use the upstream block’s catalog as an input to the data integration’s decorated functions:

Depending on how many upstream blocks your source or destination block uses as an input, it’ll determine how many positional arguments are available in any of your decorated functions.

@data_integration_catalog
def catalog(titanic_survival_data_and_catalog, *args, **kwargs) -> Dict:
    _data, catalog = titanic_survival_data_and_catalog

    return catalog

The positional argument correlated to the upstream block that you’re using as an input will be either a single object or a tuple. It’s a tuple if you checked the box labeled Use catalog as an input in the data integration block’s configuration on the tab labeled Upstream block settings.

In this example, the last item in the tuple from the 1st positional argument ( e.g. titanic_survival_data_and_catalog) contains a Python dictionary that represents the catalog from the upstream block named titanic_survival.

This catalog contains a key named streams that is a list of dictionaries containing stream settings, metadata, and schema properties of the output data from the upstream block titanic_survival.

Here is an example of that catalog (a lot of the metadata and schema properties are omitted from this example so that it’s not too lengthy):

{
  'streams': [
    {
      'metadata': [
        {
          'breadcrumb': [
            'properties',
            'Embarked',
          ],
          'metadata': {
            'inclusion': 'available',
            'selected': True,
          },
        },
      ],
      'schema': {
        'properties': {
          'PassengerId': {
            'type': [
              'null',
              'integer',
            ],
          },
        },
        'type': 'object',
      },
      'stream': 'titanic',
      'type': 'SCHEMA',
      'replication_method': 'FULL_TABLE',
    },
  ],
}

Data to be exported

Outputs from upstream blocks, as data to be exported, can only be used by destination blocks.

The outputs from upstreams blocks will not only be available as an input, but it’ll also be used as a data stream when ingesting and exporting to the destination.

You can control which upstream block’s data is ingested and exported by configuring the destination block’s streams.

Output data from source blocks

Destination blocks don’t output any data to downstream blocks.

A data integration source block will output the data fetched from the source and pass that data to its downstream blocks.

A downstream data integration destination block will automatically know how to ingest the data and process it for exporting.

Shape of output data

All other types of blocks will receive the data integration source block’s output data either as a dictionary or as a list containing 2 or more dictionaries.

The output data will be a dictionary if the source block is only fetching 1 stream.

The output data will be a list of dictionaries if the source block is fetching 2 or more streams. The number of items in the list corresponds to the number of streams that the source block is configured to sync.

Shape of dictionary

Each item in the list is a dictionary with the following keys:

Key	Value data type	Sample value	Description
`stream`	`dict`	`{ 'stream': 'accounts' }`	The dictionary for key `stream` contains information about the stream’s name (via the `stream` key), settings (e.g. replication method), metadata, and schema properties.
`columns`	`List[str]`	`['id', 'power', 'created_at']`	A list of column names from the data that was fetched for the stream.
`rows`	`List[List[Any]]`	`[[1, 3.5, '3000-01-01']]`	A list of lists where each item in the outer list is a row that was fetched from the stream. Each item in the inner list is a value from a column. The column that the value corresponds to is determined by the index of that value in its list and the column name at that same index in the `columns` list.

Sample output data

{
  "columns": [
    "passengerid",
    "survived",
    "pclass",
    "name",
    "sex",
    "age",
    "sibsp",
    "parch",
    "ticket",
    "fare",
    "cabin",
    "embarked",
    "_mage_created_at",
    "_mage_updated_at"
  ],
  "stream": {
    "tap_stream_id": "titanic",
    "replication_method": "FULL_TABLE",
    "key_properties": [],
    "schema": {
      "properties": {
        "passengerid": {
          "type": [
            "null",
            "integer"
          ]
        }
      },
      "type": "object"
    },
    "stream": "titanic",
    "metadata": [
      {
        "breadcrumb": [],
        "metadata": {
          "table-key-properties": [],
          "forced-replication-method": "FULL_TABLE",
          "valid-replication-keys": [],
          "inclusion": "available",
          "schema-name": "titanic",
          "selected": true
        }
      },
      {
        "breadcrumb": [
          "properties",
          "passengerid"
        ],
        "metadata": {
          "inclusion": "available",
          "selected": true
        }
      }
    ],
    "auto_add_new_fields": false,
    "unique_conflict_method": "UPDATE",
    "run_in_parallel": false
  },
  "rows": [
    [
      1,
      0,
      3,
      "Braund, Mr. Owen Harris",
      "male",
      22.0,
      1,
      0,
      "A/5 21171",
      7.25,
      null,
      "S",
      "2023-09-23T04:14:44.850136-07:00",
      "2023-09-23T04:14:44.850136-07:00"
    ],
    [
      1,
      0,
      3,
      "Braund, Mr. Owen Harris",
      "male",
      22.0,
      1,
      0,
      "A/5 21171",
      7.25,
      null,
      "S",
      "2023-09-23T04:37:30.366570-07:00",
      "2023-09-23T04:37:30.366570-07:00"
    ],
    [
      2,
      1,
      1,
      "Cumings, Mrs. John Bradley (Florence Briggs Thayer)",
      "female",
      38.0,
      1,
      0,
      "PC 17599",
      71.2833,
      "C85",
      "C",
      "2023-09-23T04:14:44.850153-07:00",
      "2023-09-23T04:14:44.850153-07:00"
    ],
    [
      2,
      1,
      1,
      "Cumings, Mrs. John Bradley (Florence Briggs Thayer)",
      "female",
      38.0,
      1,
      0,
      "PC 17599",
      71.2833,
      "C85",
      "C",
      "2023-09-23T04:37:30.366592-07:00",
      "2023-09-23T04:37:30.366592-07:00"
    ],
    [
      3,
      1,
      3,
      "Heikkinen, Miss. Laina",
      "female",
      26.0,
      0,
      0,
      "STON/O2. 3101282",
      7.925,
      null,
      "S",
      "2023-09-23T04:14:44.850155-07:00",
      "2023-09-23T04:14:44.850155-07:00"
    ],
    [
      3,
      1,
      3,
      "Heikkinen, Miss. Laina",
      "female",
      26.0,
      0,
      0,
      "STON/O2. 3101282",
      7.925,
      null,
      "S",
      "2023-09-23T04:37:30.366594-07:00",
      "2023-09-23T04:37:30.366594-07:00"
    ],
    [
      4,
      1,
      1,
      "Futrelle, Mrs. Jacques Heath (Lily May Peel)",
      "female",
      35.0,
      1,
      0,
      "113803",
      53.1,
      "C123",
      "S",
      "2023-09-23T04:14:44.850157-07:00",
      "2023-09-23T04:14:44.850157-07:00"
    ]
  ]
}

Load/Export stream data in parallel

For each stream in a data integration source block, you can enable that stream to have its data fetched in parallel while other streams for that source is being fetched.

For each stream in a data integration destination block, you can enable that stream to have its data exported in parallel while other streams for that destination is being exported.

This option can be turned on by editing a specific stream’s settings.

This option can also be turned on or off for multiple streams at once by bulk editing all the streams at once in the Overview section:

Incremental sync

Synchronize your data incrementally after the 1st sync.

When you choose 1 or more bookmark values in a stream, the value from that property will be saved after each successful sync. The next sync will use that value to compare to the next batch of records that need to be synced.

Override bookmark values

If you want to change the last saved bookmark value for the next sync, you can do this in 2 ways:

Example of bookmark values editor

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Overview Overview

On this page

Overview
Why is this important?
Example
Features
How to use
Configure source and destination
Credentials
Upstream block settings
Select streams
Streams overview with bulk editing
Stream detail overview
Stream detail schema properties with bulk editing
Stream detail sample data
Python blocks
@data_integration_source
@data_integration_destination
@data_integration_config
Keyword arguments inside the decorated function
@data_integration_selected_streams
Decorator arguments
Keyword arguments inside the decorated function
@data_integration_catalog
Decorator arguments
Keyword arguments inside the decorated function
Data from upstream blocks
Input arguments
Other options
Examples using upstream data output as inputs
Examples using upstream block’s catalog as input
Data to be exported
Output data from source blocks
Shape of output data
Shape of dictionary
Sample output data
Load/Export stream data in parallel
Incremental sync
Override bookmark values
Example of bookmark values editor

Adventure starts here

Concepts

Project

Contributing

About

​Overview

​Why is this important?

​Example

​Features

​How to use

​Configure source and destination

​Credentials

​Upstream block settings

​Select streams

​Streams overview with bulk editing

​Stream detail overview

​Stream detail schema properties with bulk editing

​Stream detail sample data

​Python blocks

​@data_integration_source

​@data_integration_destination

​@data_integration_config

​Keyword arguments inside the decorated function

​@data_integration_selected_streams

​Decorator arguments

​Keyword arguments inside the decorated function

​@data_integration_catalog

​Decorator arguments

​Keyword arguments inside the decorated function

​Data from upstream blocks

​Input arguments

​Other options

​Examples using upstream data output as inputs

​Examples using upstream block’s catalog as input

​Data to be exported

​Output data from source blocks

​Shape of output data

​Shape of dictionary

​Sample output data

​Load/Export stream data in parallel

​Incremental sync

​Override bookmark values

​Example of bookmark values editor

Overview

Why is this important?

Example

Features

How to use

Configure source and destination

Credentials

Upstream block settings

Select streams

Streams overview with bulk editing

Stream detail overview

Stream detail schema properties with bulk editing

Stream detail sample data

Python blocks

`@data_integration_source`

`@data_integration_destination`

`@data_integration_config`

Keyword arguments inside the decorated function

`@data_integration_selected_streams`

Decorator arguments

Keyword arguments inside the decorated function

`@data_integration_catalog`

Decorator arguments

Keyword arguments inside the decorated function

Data from upstream blocks

Input arguments

Other options

Examples using upstream data output as inputs

Examples using upstream block’s catalog as input

Data to be exported

Output data from source blocks

Shape of output data

Shape of dictionary

Sample output data

Load/Export stream data in parallel

Incremental sync

Override bookmark values

Example of bookmark values editor