Types removal - compatible changes

[pgomulka]

This issue is meant to track progress on types removal compatible changes. It is a copy of a #41059 where types removal was tracked.
This is a meta issue that tracks things that must or should be done before 8.0 in order to finalize the removal of types.
relates: the main meta issue
MUST

• Remove typed URL paths
• RestNoopBulkAction (Remove types from client-benchmark-noop-api-plugin URLs #46668) internal api
• RestNoopSearchAction (Remove types from client-benchmark-noop-api-plugin URLs #46668) internal api
• RestMultiSearchTemplateAction (Removes typed endpoint from search and related APIs #41640) feature branch compatible Compatible logic for Removes typed endpoint from search and related APIs #54572 [Rest Api Compatibility] Typed endpoints for search and related endpoints #72155
• RestSearchTemplateAction (Removes typed endpoint from search and related APIs #41640) feature branch compatible Compatible logic for Removes typed endpoint from search and related APIs #54572 [Rest Api Compatibility] Typed endpoints for search and related endpoints #72155
• RestDeleteByQueryAction (Removes typed endpoint from search and related APIs #41640) feature branch compatible Compatible logic for Removes typed endpoint from search and related APIs #54572 [Rest Api Compatibility] Typed endpoints for search and related endpoints #72155
• RestUpdateByQueryAction (Removes typed endpoint from search and related APIs #41640) feature branch compatible Compatible logic for Removes typed endpoint from search and related APIs #54572 [Rest Api Compatibility] Typed endpoints for search and related endpoints #72155
• RestGetFieldMappingAction (Removes typed URLs from mapping APIs #41676) feature branch compatible draft Mappings get put and get mappings #58426 on master [Rest API Compatibility] Typed endpoints for Put and Get Mapping and get field mappings #71721
• RestGetMappingAction (Removes typed URLs from mapping APIs #41676) feature branch compatible draft Mappings get put and get mappings #58426 on master [Rest API Compatibility] Typed endpoints for Put and Get Mapping and get field mappings #71721
• RestPutMappingAction (Removes typed URLs from mapping APIs #41676) feature branch compatible draft Mappings get put and get mappings #58426 on master [Rest API Compatibility] Typed endpoints for Put and Get Mapping and get field mappings #71721
• RestValidateQueryAction (Remove types from ValidateQuery API #46927) [Rest Api Compatibility] Validate Query typed api #74171
• RestBulkAction (Remove types from BulkRequest #46983) in master [Rest Api Compatibility] Typed endpoint for bulk api #73571
• RestDeleteAction (Remove type field from DocWriteRequest and associated Response objects #47671) feature branch compatible Compatible Delete and Update rest actions #58246 [Rest Api Compatibility] Typed endpoints for RestUpdateAction and RestDeleteAction #73115
• RestGetAction (Remove types from Get/MultiGet #46587) feature branch compatible Compatible version of typed Index And Get API #53228 for get only in order to make index tests pass on master [REST Compatible API] Typed endpoints for Index and Get APIs #69131
• RestGetSourceAction (Remove types from _source endpoint #46931) [Rest Api Compatibility] Typed endpoints for get_source api #73957
• RestIndexAction (Remove type field from DocWriteRequest and associated Response objects #47671) feature branch compatible Compatible version of typed Index And Get API #53228 on master [REST Compatible API] Typed endpoints for Index and Get APIs #69131
• RestMultiGetAction (Remove types from Get/MultiGet #46587) in master [Rest Api Compatibility] Typed endpoint for multiget api #73878
• RestMultiTermVectorsAction (Removes typed endpoint from search and related APIs #41640) feature branch compatible Compatible logic for Removes typed endpoint from search and related APIs #54572 [Rest Api Compatibility] Typed endpoints for search and related endpoints #72155
• RestTermVectorsAction (Removes typed endpoint from search and related APIs #41640) feature branch compatible Compatible logic for Removes typed endpoint from search and related APIs #54572 [Rest Api Compatibility] Typed endpoints for search and related endpoints #72155
• RestUpdateAction (Remove type field from DocWriteRequest and associated Response objects #47671) feature branch compatible Compatible Delete and Update rest actions #58246 [Rest Api Compatibility] Typed endpoints for RestUpdateAction and RestDeleteAction #73115
• RestCountAction (Removes types from SearchRequest and QueryShardContext #42112) [Rest Api Compatibility] Typed endpoints for search _count api #73958
• RestExplainAction (Remove types from explain API #46926) [Rest Api Compatibility] Typed endpoints for explain api #73901
• RestMultiSearchAction (Removes typed endpoint from search and related APIs #41640) feature branch compatible Compatible logic for Removes typed endpoint from search and related APIs #54572 [Rest Api Compatibility] Typed endpoints for search and related endpoints #72155
• RestSearchAction (Removes typed endpoint from search and related APIs #41640) feature branch compatible Compatible logic for Removes typed endpoint from search and related APIs #54572 [Rest Api Compatibility] Typed endpoints for search and related endpoints #72155
• RestGraphAction (Remove types from Graph API #46935) [Rest Api Compatibility] Typed and xpack graph explore api #74185
• RestSimulatePipelineAction Remove type metadata from ingest documents #50131 [Rest Api Compatibility] Type metadata for docs used in simulate request #74222
• Remove types from Request objects
• SearchRequest (Removes types from SearchRequest and QueryShardContext #42112)
• QueryShardContext (Removes types from SearchRequest and QueryShardContext #42112)
• TermVectorsRequest (Removes type from TermVectors APIs #42198) and MoreLikeThisQuery [Rest Api Compatibility] MoreLikeThisQuery with types #75123
• ValidateQueryRequest (Remove types from ValidateQuery API #46927) [Rest Api Compatibility] Validate Query typed api #74171
• ExplainRequest (Remove types from explain API #46926)
• RoutingMissingException (Remove types from Get/MultiGet #46587) just a message has changed. not implementing
• Remove types from the query DSL
• AbstractGeometryQueryBuilder (Remove types from GeoShapeQueryBuilder #47792) [Rest Api Compatibility] Allow for type in geo shape query #74553
• TermsQueryBuilder (Remove types from TermsLookup #46943) [Rest Api Compatibility] Typed TermLookups #74544
• PercolateQueryBuilder (Remove types from percolate query API #46985) [Rest Api Compatibility] Types for Percolate Query Api #74698
• Remove support for include_type_name in index creation, mapping and template APIs. Remove include_type_name parameter from REST layer #48632 feature branch compatible Compatible logic for include_type_param and RestCreateIndexAction #54197 on master [Rest Compatible Api] include_type_name parameter #70966
• Remove type parameters from the node client
• prepareIndex()
• prepareDelete()
• prepareUpdate()
• PutMappingRequest
• Remove _type from GET responses (Remove types from Get/MultiGet #46587)
• Remove _type from _search responses. (Remove _type from SearchHit #46942)
• Remove searches on the _type field (e.g. in terms lookup and percolator queries)
• Remove type query Remove type query #47207
• Disallow using the _type field in queries (such as term and wildcard). (Add NestedPathFieldMapper to store nested path information #51100)
• Remove types from watcher's IndexAction (Remove type from Watcher IndexAction #47986)
• Remove types from WatcherSearchTemplateRequest. (Remove types from WatcherSearchTemplateRequest #51112)
• Remove deprecated typed methods on the high-level REST client. Remove deprecated include-type methods from HLRC indices client #48471

SHOULD

• Remove types from TermsLookup (Remove types from TermsLookup #46943)

• Remove type from SourceToParse (Don't persist type information to translog #47229)

• Remove types from IndexShard.applyXOperation methods (Upgrade to Lucene 8.5.0-snapshot-c4475920b08 (#52950) #52977

• Remove code that is related to the _default_ mapping. (Remove default mapping #44945)

• Remove the _type mapping field? (Add NestedPathFieldMapper to store nested path information #51100)

• InternalIndexingStats only needs one stats instance Remove per-type indexing stats #47203

KNOWN BUGS/ TRAPS

• Index creation and put template requests can accept malformed mappings: Index creation requests can accept malformed mappings. #38266

Remaining:

• REST-layer version compatibility
• Rewrite Removal of Types doc to point to 7x branch Remove [removal-of-types] docs page, and point to 7x docs #53670
• Master nodes should refuse to join a cluster with multi-typed index templates Handling index templates with multiple mapping types #53018
• Test rolling upgrades from 7x with typed mappings and templates Create upgrade tests for typed mappings #48800
• Remove ability to reference _type in scripts via LeafDocLookup Remove deprecation warning when doc scripts refer to '_type' field #53605
• Add deprecation warning to TermsLookup#parseTermsLookup() in 7x when type is included Emit deprecation warning when TermsLookup contains a type #53731
• Remove TypeFieldMapper

Longer term:

• Merge back FieldMapper and MappedFieldType (issue: Merge FieldMapper and MappedFieldType #41058)
• Remove String type parameter from all internal code, eg. MapperService.

[professorlevi]

Hi, I use elasticsearch at work and I love it wanted to learn more about elasticsearch so I thought of contributing to it. I was thinking if there are issues which I can work on as a new contributor. Thanks!

[pgomulka]

@syedsouban thank you for your interest in contributing to Elasticsearch. Have a look into these issues for the work that might be good for new contributors. good first issue low hanging fruit