Added custom streams based on provided sql query

README.md

@@ -5,7 +5,7 @@
 Built with the [Meltano Tap SDK](https://sdk.meltano.com) for Singer Taps.
 
 The primary advantage of this version of `tap-mysql` is that it emphasizes and completes
-the `LOG_BASED` replication method, whereas other variants have buggy or incomplete 
+the `LOG_BASED` replication method, whereas other variants have buggy or incomplete
 implementations of such. Other advantages include inheriting the capabilities of a tap
 built on the Meltano Tap SDK.
 
@@ -34,26 +34,52 @@ pipx install git+https://github.com/ORG_NAME/tap-mysql.git@main
 ### Accepted Config Options
 
 <!--
-Developer TODO: Provide a list of config options accepted by the tap.
-
 This section can be created by copy-pasting the CLI output from:
 
 ```
 tap-mysql --about --format=markdown
 ```
 -->
 
+| Setting              | Required | Default | Description                                                                                                                                 |
+|:---------------------|:--------:|:-------:|:--------------------------------------------------------------------------------------------------------------------------------------------|
+| host                 |   True   |  None   | The hostname of the MySQL instance.                                                                                                         |
+| port                 |  False   |  3306   | The port number of the MySQL instance.                                                                                                      |
+| user                 |   True   |  None   | The username                                                                                                                                |
+| password             |   True   |  None   | The password for the user                                                                                                                   |
+| custom_streams       |  False   |  None   | An array of customized streams to use.                                                                                                      |
+| stream_maps          |  False   |  None   | Config object for stream maps capability. For more information check out [Stream Maps](https://sdk.meltano.com/en/latest/stream_maps.html). |
+| stream_map_config    |  False   |  None   | User-defined config values to be used within map expressions.                                                                               |
+| flattening_enabled   |  False   |  None   | 'True' to enable schema flattening and automatically expand nested properties.                                                              |
+| flattening_max_depth |  False   |  None   | The max depth to flatten schemas.                                                                                                           |
+| batch_config         |  False   |  None   |                                                                                                                                             |
+
 A full list of supported settings and capabilities for this
 tap is available by running:
 
 ```bash
 tap-mysql --about
 ```
 
+#### `custom_stream` configuration
+
+Custom streams are defined in the `custom_streams` configuration option. This option is
+an array of objects, each of which defines a custom stream. Each custom stream object
+has the following properties:
+
+| Property     | Required | Default | Description                                                                                                                                                   |
+|:-------------|:--------:|:-------:|:--------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| name         |   True   |  None   | The name of the custom stream.                                                                                                                                |
+| db_schemas   |  False   |  None   | An array of schema names of the MySQL instance that is being queried. The same query will be run against each schema.                                         |
+| sql          |   True   |  None   | The custom sql query to use for this stream. If provided, the string `{db_schema}` will be replaced with the schema name(s) from the `db_schemas` property.}` |
+| primary_keys |  False   |  None   | The primary keys of the custom stream.                                                                                                                        |
+
 ### Configure using environment variables
 
-This Singer tap will automatically import any environment variables within the working directory's
-`.env` if the `--config=ENV` is provided, such that config values will be considered if a matching
+This Singer tap will automatically import any environment variables within the working
+directory's
+`.env` if the `--config=ENV` is provided, such that config values will be considered if
+a matching
 environment variable is set either in the terminal context or in the `.env` file.
 
 ### Source Authentication and Authorization
@@ -64,7 +90,8 @@ Developer TODO: If your tap requires special access on the source system, or any
 
 ## Usage
 
-You can easily run `tap-mysql` by itself or in a pipeline using [Meltano](https://meltano.com/).
+You can easily run `tap-mysql` by itself or in a pipeline
+using [Meltano](https://meltano.com/).
 
 ### Executing the Tap Directly
 
@@ -88,7 +115,7 @@ poetry install
 ### Create and Run Tests
 
 Create tests within the `tests` subfolder and
-  then run:
+then run:
 
 ```bash
 poetry run pytest
@@ -132,5 +159,6 @@ meltano elt tap-mysql target-jsonl
 
 ### SDK Dev Guide
 
-See the [dev guide](https://sdk.meltano.com/en/latest/dev_guide.html) for more instructions on how to use the SDK to
+See the [dev guide](https://sdk.meltano.com/en/latest/dev_guide.html) for more
+instructions on how to use the SDK to
 develop your own taps and targets.

meltano.yml

@@ -21,6 +21,22 @@ plugins:
     - name: user
     - name: password
       kind: password
+    - name: custom_streams
+      kind: array
+    config:
+      custom_streams:
+      - name: example_table_name
+        db_schemas:
+          - example1
+          - example2
+        sql: SELECT * FROM {db_schema}.filesondisk LIMIT 5
+      - name: example_table_name2
+        db_schemas:
+          - example1
+        sql: SELECT * FROM example1.filesondisk LIMIT 5
+    select:
+      - '*-example_table_name.*'
+      - 'example1-example_table_name2.*'
   loaders:
   - name: target-jsonl
     variant: andyh1203

plugins/loaders/target-jsonl--andyh1203.lock

@@ -0,0 +1,34 @@
+{
+  "plugin_type": "loaders",
+  "name": "target-jsonl",
+  "namespace": "target_jsonl",
+  "variant": "andyh1203",
+  "label": "JSON Lines (JSONL)",
+  "docs": "https://hub.meltano.com/loaders/target-jsonl--andyh1203",
+  "repo": "https://github.com/andyh1203/target-jsonl",
+  "pip_url": "target-jsonl",
+  "description": "JSONL loader",
+  "logo_url": "https://hub.meltano.com/assets/logos/loaders/jsonl.png",
+  "settings": [
+    {
+      "name": "destination_path",
+      "kind": "string",
+      "value": "output",
+      "label": "Destination Path",
+      "description": "Sets the destination path the JSONL files are written to, relative\nto the project root.\n\nThe directory needs to exist already, it will not be created\nautomatically.\n\nTo write JSONL files to the project root, set an empty string (`\"\"`).\n"
+    },
+    {
+      "name": "do_timestamp_file",
+      "kind": "boolean",
+      "value": false,
+      "label": "Include Timestamp in File Names",
+      "description": "Specifies if the files should get timestamped.\n\nBy default, the resulting file will not have a timestamp in the file name (i.e. `exchange_rate.jsonl`).\n\nIf this option gets set to `true`, the resulting file will have a timestamp associated with it (i.e. `exchange_rate-{timestamp}.jsonl`).\n"
+    },
+    {
+      "name": "custom_name",
+      "kind": "string",
+      "label": "Custom File Name Override",
+      "description": "Specifies a custom name for the filename, instead of the stream name.\n\nThe file name will be `{custom_name}-{timestamp}.jsonl`, if `do_timestamp_file` is `true`.\nOtherwise the file name will be `{custom_name}.jsonl`.\n\nIf custom name is not provided, the stream name will be used.\n"
+    }
+  ]
+}