Deprecate filtering on _type. (#29468)

As indices are only allowed to have one type now, and types are going away in
the future, we should deprecate filtering by `_type`.

Relates #15613

Author: jpountz

docs/painless/painless-getting-started.asciidoc

@@ -239,7 +239,7 @@ their last name:
 
 [source,js]
 ----------------------------------------------------------------
-POST hockey/player/_update_by_query
+POST hockey/_update_by_query
 {
   "script": {
     "lang": "painless",
@@ -260,7 +260,7 @@ names start with a consonant and end with a vowel:
 
 [source,js]
 ----------------------------------------------------------------
-POST hockey/player/_update_by_query
+POST hockey/_update_by_query
 {
   "script": {
     "lang": "painless",
@@ -281,7 +281,7 @@ remove all of the vowels in all of their last names:
 
 [source,js]
 ----------------------------------------------------------------
-POST hockey/player/_update_by_query
+POST hockey/_update_by_query
 {
   "script": {
     "lang": "painless",
@@ -297,7 +297,7 @@ method so it supports `$1` and `\1` for replacements:
 
 [source,js]
 ----------------------------------------------------------------
-POST hockey/player/_update_by_query
+POST hockey/_update_by_query
 {
   "script": {
     "lang": "painless",
@@ -319,7 +319,7 @@ This will make all of the vowels in the hockey player's last names upper case:
 
 [source,js]
 ----------------------------------------------------------------
-POST hockey/player/_update_by_query
+POST hockey/_update_by_query
 {
   "script": {
     "lang": "painless",
@@ -337,7 +337,7 @@ last names upper case:
 
 [source,js]
 ----------------------------------------------------------------
-POST hockey/player/_update_by_query
+POST hockey/_update_by_query
 {
   "script": {
     "lang": "painless",

docs/reference/aggregations/bucket/significanttext-aggregation.asciidoc

@@ -38,7 +38,7 @@ Example:
 
 [source,js]
 --------------------------------------------------
-GET news/article/_search
+GET news/_search
 {
     "query" : {
         "match" : {"content" : "Bird flu"}
@@ -153,7 +153,7 @@ We can drill down into examples of these documents to see why pozmantier is conn
 
 [source,js]
 --------------------------------------------------
-GET news/article/_search
+GET news/_search
 {
   "query": {
     "simple_query_string": {
@@ -221,7 +221,7 @@ with the `filter_duplicate_text` setting turned on:
 
 [source,js]
 --------------------------------------------------
-GET news/article/_search
+GET news/_search
 {
   "query": {
     "match": {
@@ -424,7 +424,7 @@ context:
 
 [source,js]
 --------------------------------------------------
-GET news/article/_search
+GET news/_search
 {
     "query" : {
         "match" : {
@@ -463,7 +463,7 @@ will be analyzed using the `source_fields` parameter:
 
 [source,js]
 --------------------------------------------------
-GET news/article/_search
+GET news/_search
 {
     "query" : {
         "match" : {

docs/reference/aggregations/metrics/percentile-rank-aggregation.asciidoc

@@ -217,7 +217,7 @@ had a value.
 
 [source,js]
 --------------------------------------------------
-GET latency/data/_search
+GET latency/_search
 {
     "size": 0,
     "aggs" : {

docs/reference/docs/delete-by-query.asciidoc

@@ -75,7 +75,7 @@ Back to the API format, this will delete tweets from the `twitter` index:
 
 [source,js]
 --------------------------------------------------
-POST twitter/_doc/_delete_by_query?conflicts=proceed
+POST twitter/_delete_by_query?conflicts=proceed
 {
   "query": {
     "match_all": {}
@@ -85,12 +85,12 @@ POST twitter/_doc/_delete_by_query?conflicts=proceed
 // CONSOLE
 // TEST[setup:twitter]
 
-It's also possible to delete documents of multiple indexes and multiple
-types at once, just like the search API:
+It's also possible to delete documents of multiple indexes at once, just like
+the search API:
 
 [source,js]
 --------------------------------------------------
-POST twitter,blog/_docs,post/_delete_by_query
+POST twitter,blog/_delete_by_query
 {
   "query": {
     "match_all": {}

docs/reference/docs/update-by-query.asciidoc

@@ -67,7 +67,7 @@ Back to the API format, this will update tweets from the `twitter` index:
 
 [source,js]
 --------------------------------------------------
-POST twitter/_doc/_update_by_query?conflicts=proceed
+POST twitter/_update_by_query?conflicts=proceed
 --------------------------------------------------
 // CONSOLE
 // TEST[setup:twitter]
@@ -145,12 +145,12 @@ This API doesn't allow you to move the documents it touches, just modify their
 source. This is intentional! We've made no provisions for removing the document
 from its original location.
 
-It's also possible to do this whole thing on multiple indexes and multiple
-types at once, just like the search API:
+It's also possible to do this whole thing on multiple indexes at once, just
+like the search API:
 
 [source,js]
 --------------------------------------------------
-POST twitter,blog/_doc,post/_update_by_query
+POST twitter,blog/_update_by_query
 --------------------------------------------------
 // CONSOLE
 // TEST[s/^/PUT twitter\nPUT blog\n/]

docs/reference/search/search.asciidoc

@@ -12,8 +12,7 @@ that match the query. The query can either be provided using a simple
 All search APIs can be applied across multiple types within an index, and
 across multiple indices with support for the
 <<multi-index,multi index syntax>>. For
-example, we can search on all documents across all types within the
-twitter index:
+example, we can search on all documents within the twitter index:
 
 [source,js]
 --------------------------------------------------
@@ -22,15 +21,6 @@ GET /twitter/_search?q=user:kimchy
 // CONSOLE
 // TEST[setup:twitter]
 
-We can also search within specific types:
-
-[source,js]
---------------------------------------------------
-GET /twitter/tweet,user/_search?q=user:kimchy
---------------------------------------------------
-// CONSOLE
-// TEST[setup:twitter]
-
 We can also search all tweets with a certain tag across several indices
 (for example, when each user has his own index):
 

modules/aggs-matrix-stats/src/test/resources/rest-api-spec/test/stats/20_empty_bucket.yml

@@ -35,14 +35,12 @@
   - do:
       search:
         index: empty_bucket_idx
-        type: test
 
   - match: {hits.total: 2}
 
   - do:
       search:
         index: empty_bucket_idx
-        type:  test
         body: {"aggs": {"histo": {"histogram": {"field": "val1", "interval": 1, "min_doc_count": 0}, "aggs": { "mfs" : { "matrix_stats": {"fields": ["value", "val1"]} } } } } }
 
   - match: {hits.total: 2}

modules/aggs-matrix-stats/src/test/resources/rest-api-spec/test/stats/30_single_value_field.yml

@@ -130,7 +130,6 @@ setup:
   - do:
       search:
         index: unmapped
-        type:  test
         body: {"aggs": { "mfs" : { "matrix_stats": {"fields": ["val1", "val2", "val3"]} } } }
 
   - match: {hits.total: 0}
@@ -142,7 +141,6 @@ setup:
   - do:
       search:
         index: test
-        type:  test
         body: {"aggs": { "mfs" : { "matrix_stats": {"fields": ["val1", "val3"]} } } }
 
   - match: {hits.total: 15}
@@ -155,7 +153,6 @@ setup:
   - do:
       search:
         index: [test, unmapped]
-        type:  test
         body: {"aggs": { "mfs" : { "matrix_stats": {"fields": ["val1", "val2", "val3"]} } } }
 
   - match: {hits.total: 15}
@@ -169,7 +166,6 @@ setup:
   - do:
       search:
         index: [test, unmapped]
-        type:  test
         body: {"aggs": { "mfs" : { "matrix_stats": {"fields": ["val1", "val2", "val3"], "missing" : {"val2" : 10} } } } }
 
   - match: {hits.total: 15}
@@ -184,7 +180,6 @@ setup:
       catch: /parsing_exception/
       search:
         index: test
-        type:  test
         body: {"aggs": { "mfs" : { "matrix_stats": {"fields": ["val1", "val2"], "script" : { "my_script" : {"source" : "1 + doc['val1'].value", "lang" : "js"} } } } } }
 
 ---
@@ -194,5 +189,4 @@ setup:
       catch: /parsing_exception/
       search:
         index: test
-        type:  test
         body: {"aggs": { "mfs" : { "matrix_stats": {"fields": ["val1", "val2", "val3"], "script" : { "my_script" : {"source" : "my_var + doc['val1'].value", "params" : { "my_var" : 1 }, "lang" : "js" } } } } } }

modules/aggs-matrix-stats/src/test/resources/rest-api-spec/test/stats/40_multi_value_field.yml

@@ -130,7 +130,6 @@ setup:
   - do:
       search:
         index: unmapped
-        type:  test
         body: {"aggs": { "mfs" : { "matrix_stats": {"fields": ["val1", "val2", "vals"]} } } }
 
   - match: {hits.total: 0}
@@ -142,7 +141,6 @@ setup:
   - do:
       search:
         index: test
-        type:  test
         body: {"aggs": { "mfs" : { "matrix_stats": {"fields": ["val1", "vals"], "mode" : "max"} } } }
 
   - match: {hits.total: 15}
@@ -156,7 +154,6 @@ setup:
   - do:
       search:
         index: test
-        type:  test
         body: {"aggs": { "mfs" : { "matrix_stats": {"fields": ["val1", "vals"], "mode" : "min"} } } }
 
   - match: {hits.total: 15}
@@ -170,7 +167,6 @@ setup:
   - do:
       search:
         index: [test, unmapped]
-        type:  test
         body: {"aggs": { "mfs" : { "matrix_stats": {"fields": ["val1", "val2", "vals"]} } } }
 
   - match: {hits.total: 15}
@@ -184,7 +180,6 @@ setup:
   - do:
       search:
         index: [test, unmapped]
-        type:  test
         body: {"aggs": { "mfs" : { "matrix_stats": {"fields": ["val1", "val2", "vals"], "missing" : {"val2" : 10, "vals" : 5 } } } } }
 
   - match: {hits.total: 15}
@@ -199,7 +194,6 @@ setup:
       catch: /parsing_exception/
       search:
         index: test
-        type:  test
         body: {"aggs": { "mfs" : { "matrix_stats": {"fields": ["vals", "val3"], "script" : { "my_script" : {"source" : "1 + doc['val1'].value", "lang" : "js"} } } } } }
 
 ---
@@ -209,5 +203,4 @@ setup:
       catch: /parsing_exception/
       search:
         index: test
-        type:  test
         body: {"aggs": { "mfs" : { "matrix_stats": {"fields": ["val1", "val3", "vals"], "script" : { "my_script" : {"source" : "my_var + doc['val1'].value", "params" : { "my_var" : 1 }, "lang" : "js" } } } } } }

rest-api-spec/src/main/resources/rest-api-spec/test/create/60_refresh.yml

@@ -18,7 +18,6 @@
  - do:
       search:
           index:   test_1
-          type:    test
           body:
             query:   { term: { _id: 1 }}
 
@@ -36,7 +35,6 @@
  - do:
       search:
           index:   test_1
-          type:    test
           body:
             query:   { term: { _id: 2 }}
 
@@ -56,7 +54,6 @@
  - do:
       search:
           index:   test_1
-          type:    test
           body:
             query:   { term: { _id: 1 }}
 
@@ -76,7 +73,6 @@
  - do:
       search:
           index:   create_60_refresh_1
-          type:    test
           body:
             query:   { term: { _id: create_60_refresh_id1 }}
  - match: { hits.total: 1 }