[8.x] Add ResolvedExpression wrapper (#114592) #114722
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**Introduction** > In order to make adoption of failure stores simpler for all users, we are introducing a new syntactical feature to index expression resolution: The selector. > > Selectors, denoted with a :: followed by a recognized suffix will allow users to specify which component of an index abstraction they would like to operate on within an API call. In this case, an index abstraction is a concrete index, data stream, or alias; Any abstraction that can be resolved to a set of indices/shards. We define a component of an index abstraction to be some searchable unit of the index abstraction. > > To start, we will support two components: data and failures. Concrete indices are their own data components, while the data component for index aliases are all of the indices contained therein. For data streams, the data component corresponds to their backing indices. Data stream aliases mirror this, treating all backing indices of the data streams they correspond to as their data component. > > The failure component is only supported by data streams and data stream aliases. The failure component of these abstractions refer to the data streams' failure stores. Indices and index aliases do not have a failure component. For more details and examples see elastic#113144. All this work has been cherry picked from there. **Purpose of this PR** This PR is introducing a wrapper around the resolved expression that used to be a `String` to create the base on which the selectors are going to be added. The current PR is just a refactoring and does not and should not change any existing behaviour.
gmarouli
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:Data Management/Indices APIs
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@elasticmachine update branch |
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Backports the following commits to 8.x: