[8.19] Add clarification to semantic_text documentation on default quantization and lexical search support

docs/reference/mapping/types/semantic-text.asciidoc

@@ -18,6 +18,7 @@ If you don’t specify an inference endpoint, the `inference_id` field defaults
 
 Using `semantic_text`, you won't need to specify how to generate embeddings for your data, or how to index it.
 The {infer} endpoint automatically determines the embedding generation, indexing, and query to use.
+Newly created indices with `semantic_text` fields using dense embeddings will be <<dense-vector-quantization,quantized>> to `bbq_hnsw` automatically.
 
 If you use the preconfigured `.elser-2-elasticsearch` endpoint, you can set up `semantic_text` with the following API request:
 
@@ -225,7 +226,8 @@ In these cases - when you use `sparse_vector` or `dense_vector` field types inst
 For indices containing `semantic_text` fields, updates that use scripts have the following behavior:
 
 * Are supported through the https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-update[Update API].
-* Are not supported through the https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-bulk-1[Bulk API] and will fail. Even if the script targets non-`semantic_text` fields, the update will fail when the index contains a `semantic_text` field.
+* Are not supported through the https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-bulk-1[Bulk API] and will fail.
+Even if the script targets non-`semantic_text` fields, the update will fail when the index contains a `semantic_text` field.
 
 [discrete]
 [[copy-to-support]]

docs/reference/query-dsl/match-query.asciidoc

@@ -1,19 +1,18 @@
 [[query-dsl-match-query]]
 === Match query
+
 ++++
 <titleabbrev>Match</titleabbrev>
 ++++
 
-Returns documents that match a provided text, number, date or boolean value. The
-provided text is analyzed before matching.
-
-The `match` query is the standard query for performing a full-text search,
-including options for fuzzy matching.
+Returns documents that match a provided text, number, date or boolean value.
+The provided text is analyzed before matching.
 
-`Match` will also work against <<semantic-text, semantic_text>> fields,
-however when performing `match` queries against `semantic_text` fields options
-that specifically target lexical search such as `fuzziness` or `analyzer` will be ignored.
+The `match` query is the standard query for performing a full-text search, including options for fuzzy matching.
 
+`Match` will also work against <<semantic-text, semantic_text>> fields.
+As `semantic_text` does not support lexical text search, `match` queries against `semantic_text` fields will automatically perform the correct semantic search.
+Because of this, options that specifically target lexical search such as `fuzziness` or `analyzer` will be ignored.
 
 [[match-query-ex-request]]
 ==== Example request
@@ -32,85 +31,89 @@ GET /_search
 }
 --------------------------------------------------
 
-
 [[match-top-level-params]]
 ==== Top-level parameters for `match`
 
 `<field>`::
 (Required, object) Field you wish to search.
 
-
 [[match-field-params]]
 ==== Parameters for `<field>`
+
 `query`::
 +
 --
 (Required) Text, number, boolean value or date you wish to find in the provided
 `<field>`.
 
-The `match` query <<analysis,analyzes>> any provided text before performing a
-search. This means the `match` query can search <<text,`text`>> fields for
-analyzed tokens rather than an exact term.
+The `match` query <<analysis,analyzes>> any provided text before performing a search.
+This means the `match` query can search <<text,`text`>> fields for analyzed tokens rather than an exact term.
 --
 
 `analyzer`::
 (Optional, string) <<analysis,Analyzer>> used to convert the text in the `query`
-value into tokens. Defaults to the <<specify-index-time-analyzer,index-time
-analyzer>> mapped for the `<field>`. If no analyzer is mapped, the index's
-default analyzer is used.
+value into tokens.
+Defaults to the <<specify-index-time-analyzer,index-time analyzer>> mapped for the `<field>`.
+If no analyzer is mapped, the index's default analyzer is used.
 
 `auto_generate_synonyms_phrase_query`::
 +
 --
 (Optional, Boolean) If `true`, <<query-dsl-match-query-phrase,match phrase>>
-queries are automatically created for multi-term synonyms. Defaults to `true`.
+queries are automatically created for multi-term synonyms.
+Defaults to `true`.
 
-See <<query-dsl-match-query-synonyms,Use synonyms with match query>> for an
-example.
+See <<query-dsl-match-query-synonyms,Use synonyms with match query>> for an example.
 --
 
 `boost`::
 +
 --
 (Optional, float) Floating point number used to decrease or increase the
-<<relevance-scores,relevance scores>> of the query. Defaults to `1.0`.
+<<relevance-scores,relevance scores>> of the query.
+Defaults to `1.0`.
 
-Boost values are relative to the default value of `1.0`. A boost value between
-`0` and `1.0` decreases the relevance score. A value greater than `1.0`
+Boost values are relative to the default value of `1.0`.
+A boost value between
+`0` and `1.0` decreases the relevance score.
+A value greater than `1.0`
 increases the relevance score.
 --
 
 `fuzziness`::
-(Optional, string) Maximum edit distance allowed for matching. See <<fuzziness>>
-for valid values and more information. See <<query-dsl-match-query-fuzziness>>
+(Optional, string) Maximum edit distance allowed for matching.
+See <<fuzziness>>
+for valid values and more information.
+See <<query-dsl-match-query-fuzziness>>
 for an example.
 
 `max_expansions`::
-(Optional, integer) Maximum number of terms to which the query will
-expand. Defaults to `50`.
+(Optional, integer) Maximum number of terms to which the query will expand.
+Defaults to `50`.
 
 `prefix_length`::
-(Optional, integer) Number of beginning characters left unchanged for fuzzy
-matching. Defaults to `0`.
+(Optional, integer) Number of beginning characters left unchanged for fuzzy matching.
+Defaults to `0`.
 
 `fuzzy_transpositions`::
-(Optional, Boolean) If `true`, edits for fuzzy matching include
-transpositions of two adjacent characters (ab → ba). Defaults to `true`.
+(Optional, Boolean) If `true`, edits for fuzzy matching include transpositions of two adjacent characters (ab → ba).
+Defaults to `true`.
 
 `fuzzy_rewrite`::
 +
 --
-(Optional, string) Method used to rewrite the query. See the
-<<query-dsl-multi-term-rewrite, `rewrite` parameter>> for valid values and more
-information.
+(Optional, string) Method used to rewrite the query.
+See the
+<<query-dsl-multi-term-rewrite, `rewrite` parameter>> for valid values and more information.
 
 If the `fuzziness` parameter is not `0`, the `match` query uses a `fuzzy_rewrite`
 method of `top_terms_blended_freqs_${max_expansions}` by default.
 --
 
 `lenient`::
 (Optional, Boolean) If `true`, format-based errors, such as providing a text
-`query` value for a <<number,numeric>> field, are ignored. Defaults to `false`.
+`query` value for a <<number,numeric>> field, are ignored.
+Defaults to `false`.
 
 `operator`::
 +
@@ -130,16 +133,17 @@ AND of AND Hungary`.
 `minimum_should_match`::
 +
 --
-(Optional, string) Minimum number of clauses that must match for a document to
-be returned. See the <<query-dsl-minimum-should-match, `minimum_should_match`
+(Optional, string) Minimum number of clauses that must match for a document to be returned.
+See the <<query-dsl-minimum-should-match, `minimum_should_match`
 parameter>> for valid values and more information.
 --
 
 `zero_terms_query`::
 +
 --
 (Optional, string) Indicates whether no documents are returned if the `analyzer`
-removes all tokens, such as when using a `stop` filter. Valid values are:
+removes all tokens, such as when using a `stop` filter.
+Valid values are:
 
 `none` (Default)::
 No documents are returned if the `analyzer` removes all tokens.
@@ -151,15 +155,15 @@ query.
 See <<query-dsl-match-query-zero>> for an example.
 --
 
-
 [[match-query-notes]]
 ==== Notes
 
 [[query-dsl-match-query-short-ex]]
 ===== Short request example
 
 You can simplify the match query syntax by combining the `<field>` and `query`
-parameters. For example:
+parameters.
+For example:
 
 [source,console]
 ----
@@ -176,11 +180,11 @@ GET /_search
 [[query-dsl-match-query-boolean]]
 ===== How the match query works
 
-The `match` query is of type `boolean`. It means that the text
-provided is analyzed and the analysis process constructs a boolean query
-from the provided text. The `operator` parameter can be set to `or` or `and`
-to control the boolean clauses (defaults to `or`). The minimum number of
-optional `should` clauses to match can be set using the
+The `match` query is of type `boolean`.
+It means that the text provided is analyzed and the analysis process constructs a boolean query from the provided text.
+The `operator` parameter can be set to `or` or `and`
+to control the boolean clauses (defaults to `or`).
+The minimum number of optional `should` clauses to match can be set using the
 <<query-dsl-minimum-should-match,`minimum_should_match`>>
 parameter.
 
@@ -201,13 +205,11 @@ GET /_search
 }
 --------------------------------------------------
 
-The `analyzer` can be set to control which analyzer will perform the
-analysis process on the text. It defaults to the field explicit mapping
-definition, or the default search analyzer.
+The `analyzer` can be set to control which analyzer will perform the analysis process on the text.
+It defaults to the field explicit mapping definition, or the default search analyzer.
 
-The `lenient` parameter can be set to `true` to ignore exceptions caused by
-data-type mismatches,  such as trying to query a numeric field with a text
-query string. Defaults to `false`.
+The `lenient` parameter can be set to `true` to ignore exceptions caused by data-type mismatches, such as trying to query a numeric field with a text query string.
+Defaults to `false`.
 
 [[query-dsl-match-query-fuzziness]]
 ===== Fuzziness in the match query
@@ -218,17 +220,12 @@ See <<fuzziness>> for allowed settings.
 The `prefix_length` and
 `max_expansions` can be set in this case to control the fuzzy process.
 If the fuzzy option is set the query will use `top_terms_blended_freqs_${max_expansions}`
-as its <<query-dsl-multi-term-rewrite,rewrite
-method>> the `fuzzy_rewrite` parameter allows to control how the query will get
-rewritten.
+as its <<query-dsl-multi-term-rewrite,rewrite method>> the `fuzzy_rewrite` parameter allows to control how the query will get rewritten.
 
-Fuzzy transpositions (`ab` -> `ba`) are allowed by default but can be disabled
-by setting `fuzzy_transpositions` to `false`.
+Fuzzy transpositions (`ab` -> `ba`) are allowed by default but can be disabled by setting `fuzzy_transpositions` to `false`.
 
-NOTE: Fuzzy matching is not applied to terms with synonyms or in cases where the
-analysis process produces multiple tokens at the same position. Under the hood
-these terms are expanded to a special synonym query that blends term frequencies,
-which does not support fuzzy expansion.
+NOTE: Fuzzy matching is not applied to terms with synonyms or in cases where the analysis process produces multiple tokens at the same position.
+Under the hood these terms are expanded to a special synonym query that blends term frequencies, which does not support fuzzy expansion.
 
 [source,console]
 --------------------------------------------------
@@ -247,9 +244,9 @@ GET /_search
 
 [[query-dsl-match-query-zero]]
 ===== Zero terms query
-If the analyzer used removes all tokens in a query like a `stop` filter
-does, the default behavior is to match no documents at all. In order to
-change that the `zero_terms_query` option can be used, which accepts
+
+If the analyzer used removes all tokens in a query like a `stop` filter does, the default behavior is to match no documents at all.
+In order to change that the `zero_terms_query` option can be used, which accepts
 `none` (default) and `all` which corresponds to a `match_all` query.
 
 [source,console]
@@ -271,8 +268,8 @@ GET /_search
 [[query-dsl-match-query-synonyms]]
 ===== Synonyms
 
-The `match` query supports multi-terms synonym expansion with the <<analysis-synonym-graph-tokenfilter,
-synonym_graph>> token filter. When this filter is used, the parser creates a phrase query for each multi-terms synonyms.
+The `match` query supports multi-terms synonym expansion with the <<analysis-synonym-graph-tokenfilter, synonym_graph>> token filter.
+When this filter is used, the parser creates a phrase query for each multi-terms synonyms.
 For example, the following synonym: `"ny, new york"` would produce:
 
 `(ny OR ("new york"))`

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/fulltext/Match.java

@@ -148,6 +148,7 @@ public class Match extends FullTextFunction implements OptionalArgument, PostAna
 
             Match can be used on fields from the text family like <<text, text>> and <<semantic-text, semantic_text>>,
             as well as other field types like keyword, boolean, dates, and numeric types.
+            When Match is used on a <<semantic-text, semantic_text>> field, it will perform a semantic query on the field.
 
             Match can use <<esql-function-named-params,function named parameters>> to specify additional options for the match query.
             All <<match-field-params,match query parameters>> are supported.