You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
196 lines
7.6 KiB
196 lines
7.6 KiB
# Changes in Elastic 5.0
|
|
|
|
## Enforce context.Context in PerformRequest and Do
|
|
|
|
We enforce the usage of `context.Context` everywhere you execute a request.
|
|
You need to change all your `Do()` calls to pass a context: `Do(ctx)`.
|
|
This enables automatic request cancelation and many other patterns.
|
|
|
|
If you don't need this, simply pass `context.TODO()` or `context.Background()`.
|
|
|
|
## Warmers removed
|
|
|
|
Warmers are no longer necessary and have been [removed in ES 5.0](https://www.elastic.co/guide/en/elasticsearch/reference/master/breaking_50_index_apis.html#_warmers).
|
|
|
|
## Optimize removed
|
|
|
|
Optimize was deprecated in ES 2.0 and has been [removed in ES 5.0](https://www.elastic.co/guide/en/elasticsearch/reference/master/breaking_50_rest_api_changes.html#_literal__optimize_literal_endpoint_removed).
|
|
Use [Force Merge](https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-forcemerge.html) instead.
|
|
|
|
## Missing Query removed
|
|
|
|
The `missing` query has been [removed](https://www.elastic.co/guide/en/elasticsearch/reference/master/query-dsl-exists-query.html#_literal_missing_literal_query).
|
|
Use `exists` query with `must_not` in `bool` query instead.
|
|
|
|
## And Query removed
|
|
|
|
The `and` query has been [removed](https://www.elastic.co/guide/en/elasticsearch/reference/master/breaking_50_search_changes.html#_deprecated_queries_removed).
|
|
Use `must` clauses in a `bool` query instead.
|
|
|
|
## Not Query removed
|
|
|
|
TODO Is it removed?
|
|
|
|
## Or Query removed
|
|
|
|
The `or` query has been [removed](https://www.elastic.co/guide/en/elasticsearch/reference/master/breaking_50_search_changes.html#_deprecated_queries_removed).
|
|
Use `should` clauses in a `bool` query instead.
|
|
|
|
## Filtered Query removed
|
|
|
|
The `filtered` query has been [removed](https://www.elastic.co/guide/en/elasticsearch/reference/master/breaking_50_search_changes.html#_deprecated_queries_removed).
|
|
Use `bool` query instead, which supports `filter` clauses too.
|
|
|
|
## Limit Query removed
|
|
|
|
The `limit` query has been [removed](https://www.elastic.co/guide/en/elasticsearch/reference/master/breaking_50_search_changes.html#_deprecated_queries_removed).
|
|
Use the `terminate_after` parameter instead.
|
|
|
|
# Template Query removed
|
|
|
|
The `template` query has been [deprecated](https://www.elastic.co/guide/en/elasticsearch/reference/5.x/query-dsl-template-query.html). You should use
|
|
Search Templates instead.
|
|
|
|
We remove it from Elastic 5.0 as the 5.0 update is already a good opportunity
|
|
to get rid of old stuff.
|
|
|
|
## `_timestamp` and `_ttl` removed
|
|
|
|
Both of these fields were deprecated and are now [removed](https://www.elastic.co/guide/en/elasticsearch/reference/master/breaking_50_mapping_changes.html#_literal__timestamp_literal_and_literal__ttl_literal).
|
|
|
|
## Search template Put/Delete API returns `acknowledged` only
|
|
|
|
The response type for Put/Delete search templates has changed.
|
|
It only returns a single `acknowledged` flag now.
|
|
|
|
## Fields has been renamed to Stored Fields
|
|
|
|
The `fields` parameter has been renamed to `stored_fields`.
|
|
See [here](https://www.elastic.co/guide/en/elasticsearch/reference/5.x/breaking_50_search_changes.html#_literal_fields_literal_parameter).
|
|
|
|
## Fielddatafields has been renamed to Docvaluefields
|
|
|
|
The `fielddata_fields` parameter [has been renamed](https://www.elastic.co/guide/en/elasticsearch/reference/5.x/breaking_50_search_changes.html#_literal_fielddata_fields_literal_parameter)
|
|
to `docvalue_fields`.
|
|
|
|
## Type exists endpoint changed
|
|
|
|
The endpoint for checking whether a type exists has been changed from
|
|
`HEAD {index}/{type}` to `HEAD {index}/_mapping/{type}`.
|
|
See [here](https://www.elastic.co/guide/en/elasticsearch/reference/5.0/breaking_50_rest_api_changes.html#_literal_head_index_type_literal_replaced_with_literal_head_index__mapping_type_literal).
|
|
|
|
## Refresh parameter changed
|
|
|
|
The `?refresh` parameter previously could be a boolean value. It indicated
|
|
whether changes made by a request (e.g. by the Bulk API) should be immediately
|
|
visible in search, or not. Using `refresh=true` had the positive effect of
|
|
immediately seeing the changes when searching; the negative effect is that
|
|
it is a rather big performance hit.
|
|
|
|
With 5.0, you now have the choice between these 3 values.
|
|
|
|
* `"true"` - Refresh immediately
|
|
* `"false"` - Do not refresh (the default value)
|
|
* `"wait_for"` - Wait until ES made the document visible in search
|
|
|
|
See [?refresh](https://www.elastic.co/guide/en/elasticsearch/reference/master/docs-refresh.html) in the documentation.
|
|
|
|
Notice that `true` and `false` (the boolean values) are no longer available
|
|
now in Elastic. You must use a string instead, with one of the above values.
|
|
|
|
## ReindexerService removed
|
|
|
|
The `ReindexerService` was a custom solution that was started in the ES 1.x era
|
|
to automate reindexing data, from one index to another or even between clusters.
|
|
|
|
ES 2.3 introduced its own [Reindex API](https://www.elastic.co/guide/en/elasticsearch/reference/master/docs-reindex.html)
|
|
so we're going to remove our custom solution and ask you to use the native reindexer.
|
|
|
|
The `ReindexService` is available via `client.Reindex()` (which used to point
|
|
to the custom reindexer).
|
|
|
|
## Delete By Query back in core
|
|
|
|
The [Delete By Query API](https://www.elastic.co/guide/en/elasticsearch/reference/master/docs-delete-by-query.html)
|
|
was moved into a plugin in 2.0. Now its back in core with a complete rewrite based on the Bulk API.
|
|
|
|
It has it's own endpoint at `/_delete_by_query`.
|
|
|
|
Delete By Query, Reindex, and Update By Query are very similar under the hood.
|
|
|
|
## Reindex, Delete By Query, and Update By Query response changed
|
|
|
|
The response from the above APIs changed a bit. E.g. the `retries` value
|
|
used to be an `int64` and returns separate values for `bulk` and `search` now:
|
|
|
|
```
|
|
// Old
|
|
{
|
|
...
|
|
"retries": 123,
|
|
...
|
|
}
|
|
```
|
|
|
|
```
|
|
// New
|
|
{
|
|
...
|
|
"retries": {
|
|
"bulk": 123,
|
|
"search": 0
|
|
},
|
|
...
|
|
}
|
|
```
|
|
|
|
## ScanService removed
|
|
|
|
The `ScanService` is removed. Use the (new) `ScrollService` instead.
|
|
|
|
## New ScrollService
|
|
|
|
There was confusion around `ScanService` and `ScrollService` doing basically
|
|
the same. One was returning slices and didn't support all query details, the
|
|
other returned one document after another and wasn't safe for concurrent use.
|
|
So we merged the two and merged it into a new `ScrollService` that
|
|
removes all the problems with the older services.
|
|
|
|
In other words:
|
|
If you used `ScanService`, switch to `ScrollService`.
|
|
If you used the old `ScrollService`, you might need to fix some things but
|
|
overall it should just work.
|
|
|
|
Changes:
|
|
- We replaced `elastic.EOS` with `io.EOF` to indicate the "end of scroll".
|
|
|
|
TODO Not implemented yet
|
|
|
|
## Suggesters
|
|
|
|
They have been [completely rewritten in ES 5.0](https://www.elastic.co/guide/en/elasticsearch/reference/master/breaking_50_suggester.html).
|
|
|
|
Some changes:
|
|
- Suggesters no longer have an [output](https://www.elastic.co/guide/en/elasticsearch/reference/master/breaking_50_suggester.html#_simpler_completion_indexing).
|
|
|
|
TODO Fix all structural changes in suggesters
|
|
|
|
## Percolator
|
|
|
|
Percolator has [changed considerably](https://www.elastic.co/guide/en/elasticsearch/reference/5.x/breaking_50_percolator.html).
|
|
|
|
Elastic 5.0 adds the new
|
|
[Percolator Query](https://www.elastic.co/guide/en/elasticsearch/reference/5.x/query-dsl-percolate-query.html)
|
|
which can be used in combination with the new
|
|
[Percolator type](https://www.elastic.co/guide/en/elasticsearch/reference/5.x/percolator.html).
|
|
|
|
The Percolate service is removed from Elastic 5.0.
|
|
|
|
## Remove Consistency, add WaitForActiveShards
|
|
|
|
The `consistency` parameter has been removed in a lot of places, e.g. the Bulk,
|
|
Index, Delete, Delete-by-Query, Reindex, Update, and Update-by-Query API.
|
|
|
|
It has been replaced by a somewhat similar `wait_for_active_shards` parameter.
|
|
See https://github.com/elastic/elasticsearch/pull/19454.
|