741 lines
16 KiB
Markdown
741 lines
16 KiB
Markdown
---
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layout: default
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title: Transforms APIs
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nav_order: 45
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parent: Index transforms
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has_toc: true
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---
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# Transforms APIs
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Aside from using OpenSearch Dashboards, you can also use the REST API to create, start, stop, and complete other operations relative to transform jobs.
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#### Table of contents
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- TOC
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{:toc}
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## Create a transform job
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Introduced 1.0
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{: .label .label-purple }
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Creates a transform job.
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**Sample Request**
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```json
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PUT _plugins/_transform/<transform_id>
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{
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"transform": {
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"enabled": true,
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"schedule": {
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"interval": {
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"period": 1,
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"unit": "Minutes",
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"start_time": 1602100553
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}
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},
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"description": "Sample transform job",
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"source_index": "sample_index",
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"target_index": "sample_target",
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"data_selection_query": {
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"match_all": {}
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},
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"page_size": 1,
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"groups": [
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{
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"terms": {
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"source_field": "customer_gender",
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"target_field": "gender"
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}
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},
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{
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"terms": {
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"source_field": "day_of_week",
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"target_field": "day"
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}
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}
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],
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"aggregations": {
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"quantity": {
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"sum": {
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"field": "total_quantity"
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}
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}
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}
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}
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}
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```
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**Sample Response**
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```json
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{
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"_id": "sample",
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"_version": 7,
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"_seq_no": 13,
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"_primary_term": 1,
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"transform": {
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"transform_id": "sample",
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"schema_version": 7,
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"schedule": {
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"interval": {
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"start_time": 1621467964243,
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"period": 1,
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"unit": "Minutes"
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}
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},
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"metadata_id": null,
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"updated_at": 1621467964243,
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"enabled": true,
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"enabled_at": 1621467964243,
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"description": "Sample transform job",
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"source_index": "sample_index",
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"data_selection_query": {
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"match_all": {
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"boost": 1.0
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}
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},
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"target_index": "sample_target",
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"roles": [],
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"page_size": 1,
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"groups": [
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{
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"terms": {
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"source_field": "customer_gender",
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"target_field": "gender"
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}
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},
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{
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"terms": {
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"source_field": "day_of_week",
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"target_field": "day"
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}
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}
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],
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"aggregations": {
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"quantity": {
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"sum": {
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"field": "total_quantity"
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}
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}
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}
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}
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}
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```
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You can specify the following options in the HTTP request body:
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Option | Data Type | Description | Required
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:--- | :--- | :--- | :---
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enabled | Boolean | If true, the transform job is enabled at creation. | No
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schedule | Object | The schedule the transform job runs on. | Yes
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start_time | Integer | The Unix epoch time of the transform job's start time. | Yes
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description | String | Describes the transform job. | No
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metadata_id | String | Any metadata to be associated with the transform job. | No
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source_index | String | The source index whose data to transform. | Yes
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target_index | String | The target index the newly transformed data is added into. You can create a new index or update an existing one. | Yes
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data_selection_query | Object | The query DSL to use to filter a subset of the source index for the transform job. See [query DSL]({{site.url}}{{site.baseurl}}/opensearch/query-dsl) for more information. | Yes
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page_size | Integer | The number of buckets IM processes and indexes concurrently. Higher number means better performance but requires more memory. If your machine runs out of memory, IM automatically adjusts this field and retries until the operation succeeds. | Yes
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groups | Array | Specifies the grouping(s) to use in the transform job. Supported groups are `terms`, `histogram`, and `date_histogram`. For more information, see [Bucket Aggregations]({{site.url}}{{site.baseurl}}/opensearch/bucket-agg). | Yes if not using aggregations
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source_field | String | The field(s) to transform | Yes
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aggregations | Object | The aggregations to use in the transform job. Supported aggregations are: `sum`, `max`, `min`, `value_count`, `avg`, `scripted_metric`, and `percentiles`. For more information, see [Metric Aggregations]({{site.url}}{{site.baseurl}}/opensearch/metric-agg). | Yes if not using groups
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## Update a transform job
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Introduced 1.0
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{: .label .label-purple }
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Updates a transform job if `transform_id` already exists.
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**Sample Request**
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```json
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PUT _plugins/_transform/<transform_id>
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{
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"transform": {
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"enabled": true,
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"schedule": {
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"interval": {
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"period": 1,
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"unit": "Minutes",
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"start_time": 1602100553
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}
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},
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"description": "Sample transform job",
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"source_index": "sample_index",
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"target_index": "sample_target",
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"data_selection_query": {
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"match_all": {}
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},
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"page_size": 1,
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"groups": [
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{
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"terms": {
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"source_field": "customer_gender",
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"target_field": "gender"
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}
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},
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{
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"terms": {
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"source_field": "day_of_week",
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"target_field": "day"
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}
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}
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],
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"aggregations": {
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"quantity": {
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"sum": {
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"field": "total_quantity"
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}
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}
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}
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}
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}
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```
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**Sample Response**
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```json
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{
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"_id": "sample",
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"_version": 2,
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"_seq_no": 14,
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"_primary_term": 1,
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"transform": {
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"transform_id": "sample",
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"schema_version": 7,
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"schedule": {
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"interval": {
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"start_time": 1602100553,
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"period": 1,
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"unit": "Minutes"
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}
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},
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"metadata_id": null,
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"updated_at": 1621889843874,
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"enabled": true,
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"enabled_at": 1621889843874,
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"description": "Sample transform job",
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"source_index": "sample_index",
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"data_selection_query": {
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"match_all": {
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"boost": 1.0
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}
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},
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"target_index": "sample_target",
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"roles": [],
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"page_size": 1,
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"groups": [
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{
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"terms": {
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"source_field": "customer_gender",
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"target_field": "gender"
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}
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},
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{
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"terms": {
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"source_field": "day_of_week",
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"target_field": "day"
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}
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}
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],
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"aggregations": {
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"quantity": {
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"sum": {
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"field": "total_quantity"
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}
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}
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}
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}
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}
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```
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The Update operation supports the following URL parameters:
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Parameter | Description | Required
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:---| :--- | :---
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`if_seq_no` | Only perform the transform operation if the last operation that changed the transform job has the specified sequence number. | Yes
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`if_primary_term` | Only perform the transform operation if the last operation that changed the transform job has the specified sequence term. | Yes
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You can update the following fields:
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Option | Data Type | Description
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:--- | :--- | :---
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schedule | Object | The schedule the transform job runs on. Contains the fields `interval.start_time`, `interval.period`, and `interval.unit`.
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start_time | Integer | The Unix epoch start time of the transform job.
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period | Integer | How often to execute the transform job.
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unit | String | The unit of time associated with the execution period. Available options are `Minutes`, `Hours`, and `Days`.
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description | Integer | Describes the transform job.
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page_size | Integer | The number of buckets IM processes and indexes concurrently. Higher number means better performance but requires more memory. If your machine runs out of memory, IM automatically adjusts this field and retries until the operation succeeds.
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## Get a transform job's details
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Introduced 1.0
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{: .label .label-purple }
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Returns a transform job's details.
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**Sample Request**
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```json
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GET _plugins/_transform/<transform_id>
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```
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**Sample Response**
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```json
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{
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"_id": "sample",
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"_version": 7,
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"_seq_no": 13,
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"_primary_term": 1,
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"transform": {
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"transform_id": "sample",
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"schema_version": 7,
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"schedule": {
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"interval": {
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"start_time": 1621467964243,
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"period": 1,
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"unit": "Minutes"
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}
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},
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"metadata_id": null,
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"updated_at": 1621467964243,
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"enabled": true,
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"enabled_at": 1621467964243,
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"description": "Sample transform job",
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"source_index": "sample_index",
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"data_selection_query": {
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"match_all": {
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"boost": 1.0
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}
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},
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"target_index": "sample_target",
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"roles": [],
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"page_size": 1,
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"groups": [
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{
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"terms": {
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"source_field": "customer_gender",
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"target_field": "gender"
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}
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},
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{
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"terms": {
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"source_field": "day_of_week",
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"target_field": "day"
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}
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}
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],
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"aggregations": {
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"quantity": {
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"sum": {
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"field": "total_quantity"
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}
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}
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}
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}
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}
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```
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You can also get details of all transform jobs by omitting `transform_id`.
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**Sample Request**
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```json
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GET _plugins/_transform/
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```
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**Sample Response**
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```json
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{
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"total_transforms": 1,
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"transforms": [
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{
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"_id": "sample",
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"_seq_no": 13,
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"_primary_term": 1,
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"transform": {
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"transform_id": "sample",
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"schema_version": 7,
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"schedule": {
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"interval": {
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"start_time": 1621467964243,
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"period": 1,
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"unit": "Minutes"
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}
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},
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"metadata_id": null,
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"updated_at": 1621467964243,
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"enabled": true,
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"enabled_at": 1621467964243,
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"description": "Sample transform job",
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"source_index": "sample_index",
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"data_selection_query": {
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||
"match_all": {
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"boost": 1.0
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}
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},
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"target_index": "sample_target",
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"roles": [],
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"page_size": 1,
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"groups": [
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{
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"terms": {
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"source_field": "customer_gender",
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"target_field": "gender"
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}
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},
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{
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"terms": {
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"source_field": "day_of_week",
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"target_field": "day"
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}
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}
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],
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"aggregations": {
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"quantity": {
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"sum": {
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"field": "total_quantity"
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}
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}
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}
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}
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}
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]
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}
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```
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You can specify these options as the `GET` API operation’s URL parameters to filter results:
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Parameter | Description | Required
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:--- | :--- | :---
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from | The starting index to search from. Default is 0. | No
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size | Specifies the amount of results to return. Default is 10. | No
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search |The search term to use to filter results. | No
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sortField | The field to sort results with. | No
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sortDirection | Specifies the direction to sort results in. Can be `ASC` or `DESC`. Default is ASC. | No
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For example, this request returns two results starting from the eighth index.
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**Sample Request**
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```json
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GET _plugins/_transform?size=2&from=8
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```
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**Sample Response**
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```json
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{
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"total_transforms": 18,
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"transforms": [
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{
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"_id": "sample8",
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"_seq_no": 93,
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"_primary_term": 1,
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"transform": {
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"transform_id": "sample8",
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"schema_version": 7,
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"schedule": {
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"interval": {
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||
"start_time": 1622063596812,
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"period": 1,
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"unit": "Minutes"
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}
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},
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"metadata_id": "y4hFAB2ZURQ2dzY7BAMxWA",
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"updated_at": 1622063657233,
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"enabled": false,
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"enabled_at": null,
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"description": "Sample transform job",
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"source_index": "sample_index3",
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"data_selection_query": {
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"match_all": {
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"boost": 1.0
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}
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},
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"target_index": "sample_target3",
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"roles": [],
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"page_size": 1,
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"groups": [
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{
|
||
"terms": {
|
||
"source_field": "customer_gender",
|
||
"target_field": "gender"
|
||
}
|
||
},
|
||
{
|
||
"terms": {
|
||
"source_field": "day_of_week",
|
||
"target_field": "day"
|
||
}
|
||
}
|
||
],
|
||
"aggregations": {
|
||
"quantity": {
|
||
"sum": {
|
||
"field": "total_quantity"
|
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}
|
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}
|
||
}
|
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}
|
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},
|
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{
|
||
"_id": "sample9",
|
||
"_seq_no": 98,
|
||
"_primary_term": 1,
|
||
"transform": {
|
||
"transform_id": "sample9",
|
||
"schema_version": 7,
|
||
"schedule": {
|
||
"interval": {
|
||
"start_time": 1622063598065,
|
||
"period": 1,
|
||
"unit": "Minutes"
|
||
}
|
||
},
|
||
"metadata_id": "x8tCIiYMTE3veSbIJkit5A",
|
||
"updated_at": 1622063658388,
|
||
"enabled": false,
|
||
"enabled_at": null,
|
||
"description": "Sample transform job",
|
||
"source_index": "sample_index4",
|
||
"data_selection_query": {
|
||
"match_all": {
|
||
"boost": 1.0
|
||
}
|
||
},
|
||
"target_index": "sample_target4",
|
||
"roles": [],
|
||
"page_size": 1,
|
||
"groups": [
|
||
{
|
||
"terms": {
|
||
"source_field": "customer_gender",
|
||
"target_field": "gender"
|
||
}
|
||
},
|
||
{
|
||
"terms": {
|
||
"source_field": "day_of_week",
|
||
"target_field": "day"
|
||
}
|
||
}
|
||
],
|
||
"aggregations": {
|
||
"quantity": {
|
||
"sum": {
|
||
"field": "total_quantity"
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
]
|
||
}
|
||
```
|
||
|
||
## Start a transform job
|
||
Introduced 1.0
|
||
{: .label .label-purple }
|
||
|
||
Transform jobs created using the API are automatically enabled, but if you ever need to enable a job, you can use the `start` API operation.
|
||
|
||
**Sample Request**
|
||
|
||
```json
|
||
POST _plugins/_transform/<transform_id>/_start
|
||
```
|
||
|
||
**Sample Response**
|
||
|
||
```json
|
||
{
|
||
"acknowledged": true
|
||
}
|
||
```
|
||
|
||
## Stop a transform job
|
||
Introduced 1.0
|
||
{: .label .label-purple }
|
||
|
||
Stops/disables a transform job.
|
||
|
||
**Sample Request**
|
||
|
||
```json
|
||
POST _plugins/_transform/<transform_id>/_stop
|
||
```
|
||
|
||
**Sample Response**
|
||
|
||
```json
|
||
{
|
||
"acknowledged": true
|
||
}
|
||
```
|
||
|
||
## Get the status of a transform job
|
||
Introduced 1.0
|
||
{: .label .label-purple }
|
||
|
||
Returns the status and metadata of a transform job.
|
||
|
||
**Sample Request**
|
||
|
||
```json
|
||
GET _plugins/_transform/<transform_id>/_explain
|
||
```
|
||
|
||
**Sample Response**
|
||
|
||
```json
|
||
{
|
||
"sample": {
|
||
"metadata_id": "PzmjweME5xbgkenl9UpsYw",
|
||
"transform_metadata": {
|
||
"transform_id": "sample",
|
||
"last_updated_at": 1621883525873,
|
||
"status": "finished",
|
||
"failure_reason": "null",
|
||
"stats": {
|
||
"pages_processed": 0,
|
||
"documents_processed": 0,
|
||
"documents_indexed": 0,
|
||
"index_time_in_millis": 0,
|
||
"search_time_in_millis": 0
|
||
}
|
||
}
|
||
}
|
||
}
|
||
```
|
||
|
||
## Preview a transform job's results
|
||
Introduced 1.0
|
||
{: .label .label-purple }
|
||
|
||
Returns a preview of what a transformed index would look like.
|
||
|
||
**Sample Request**
|
||
|
||
```json
|
||
POST _plugins/_transform/_preview
|
||
|
||
{
|
||
"transform": {
|
||
"enabled": false,
|
||
"schedule": {
|
||
"interval": {
|
||
"period": 1,
|
||
"unit": "Minutes",
|
||
"start_time": 1602100553
|
||
}
|
||
},
|
||
"description": "test transform",
|
||
"source_index": "sample_index",
|
||
"target_index": "sample_target",
|
||
"data_selection_query": {
|
||
"match_all": {}
|
||
},
|
||
"page_size": 10,
|
||
"groups": [
|
||
{
|
||
"terms": {
|
||
"source_field": "customer_gender",
|
||
"target_field": "gender"
|
||
}
|
||
},
|
||
{
|
||
"terms": {
|
||
"source_field": "day_of_week",
|
||
"target_field": "day"
|
||
}
|
||
}
|
||
],
|
||
"aggregations": {
|
||
"quantity": {
|
||
"sum": {
|
||
"field": "total_quantity"
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
```
|
||
|
||
**Sample Response**
|
||
|
||
```json
|
||
{
|
||
"documents" : [
|
||
{
|
||
"quantity" : 862.0,
|
||
"gender" : "FEMALE",
|
||
"day" : "Friday"
|
||
},
|
||
{
|
||
"quantity" : 682.0,
|
||
"gender" : "FEMALE",
|
||
"day" : "Monday"
|
||
},
|
||
{
|
||
"quantity" : 772.0,
|
||
"gender" : "FEMALE",
|
||
"day" : "Saturday"
|
||
},
|
||
{
|
||
"quantity" : 669.0,
|
||
"gender" : "FEMALE",
|
||
"day" : "Sunday"
|
||
},
|
||
{
|
||
"quantity" : 887.0,
|
||
"gender" : "FEMALE",
|
||
"day" : "Thursday"
|
||
}
|
||
]
|
||
}
|
||
```
|
||
|
||
## Delete a transform job
|
||
Introduced 1.0
|
||
{: .label .label-purple }
|
||
|
||
Deletes a transform job. This operation does not delete the source or target indices.
|
||
|
||
**Sample Request**
|
||
|
||
```json
|
||
DELETE _plugins/_transform/<transform_id>
|
||
```
|
||
|
||
**Sample Response**
|
||
|
||
```json
|
||
{
|
||
"took": 205,
|
||
"errors": false,
|
||
"items": [
|
||
{
|
||
"delete": {
|
||
"_index": ".opensearch-ism-config",
|
||
"_type": "_doc",
|
||
"_id": "sample",
|
||
"_version": 4,
|
||
"result": "deleted",
|
||
"forced_refresh": true,
|
||
"_shards": {
|
||
"total": 2,
|
||
"successful": 1,
|
||
"failed": 0
|
||
},
|
||
"_seq_no": 6,
|
||
"_primary_term": 1,
|
||
"status": 200
|
||
}
|
||
}
|
||
]
|
||
}
|
||
```
|