Merge branch 'main' into bootstrap-entitlements-for-testing

Author: mosche

build-tools-internal/src/test/java/org/elasticsearch/gradle/internal/release/ReleaseNotesGeneratorTest.java

@@ -19,6 +19,7 @@
 import java.util.Objects;
 
 import static org.elasticsearch.gradle.internal.release.GenerateReleaseNotesTask.getSortedBundlesWithUniqueChangelogs;
+import static org.hamcrest.Matchers.arrayContaining;
 import static org.hamcrest.Matchers.equalTo;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertThat;
@@ -100,7 +101,10 @@ public void testTemplate(String templateFilename, String outputFilename, List<Ch
             writeResource(outputFile, actualOutput);
             assertFalse("UPDATE_EXPECTED_OUTPUT should be set back to false after updating output", UPDATE_EXPECTED_OUTPUT);
         } else {
-            assertThat(actualOutput, equalTo(expectedOutput));
+            String[] expectedLines = expectedOutput.replace("\r", "").split("\n");
+            String[] actualLines = actualOutput.split("\n");
+
+            assertThat(actualLines, arrayContaining(expectedLines));
         }
     }
 

docs/changelog/127223.yaml

@@ -0,0 +1,5 @@
+pr: 127223
+summary: Wrap ES KNN queries with PatienceKNN query
+area: Vector Search
+type: feature
+issues: []

docs/changelog/129945.yaml

@@ -0,0 +1,5 @@
+pr: 129945
+summary: "Enhancement: ILM sets `indexing_complete` to true from `ReadOnly` action"
+area: ILM+SLM
+type: enhancement
+issues: []

docs/changelog/130251.yaml

@@ -0,0 +1,5 @@
+pr: 130251
+summary: Speed up (filtered) KNN queries for flat vector fields
+area: Vector Search
+type: enhancement
+issues: []

docs/changelog/130330.yaml

@@ -0,0 +1,6 @@
+pr: 130330
+summary: "TopNOperator, release Row on failure"
+area: ES|QL
+type: bug
+issues:
+ - 130215

docs/changelog/130344.yaml

@@ -0,0 +1,5 @@
+pr: 130344
+summary: "Fix queries with missing index, `skip_unavailable` and filters"
+area: ES|QL
+type: bug
+issues: []

docs/reference/elasticsearch/index-settings/index-modules.md

@@ -259,3 +259,6 @@ $$$index-esql-stored-fields-sequential-proportion$$$
 
 `index.esql.stored_fields_sequential_proportion`
 :   Tuning parameter for deciding when {{esql}} will load [Stored fields](/reference/elasticsearch/rest-apis/retrieve-selected-fields.md#stored-fields) using a strategy tuned for loading dense sequence of documents. Allows values between 0.0 and 1.0 and defaults to 0.2. Indices with documents smaller than 10kb may see speed improvements loading `text` fields by setting this lower.
+
+$$$index-dense-vector-hnsw-early-termination$$$ `index.dense_vector.hnsw_early_termination`
+:   Whether to apply _patience_ based early termination strategy to knn queries over HNSW graphs (see [paper](https://cs.uwaterloo.ca/~jimmylin/publications/Teofili_Lin_ECIR2025.pdf)). This is only applicable to `dense_vector` fields with `hnsw`, `int8_hnsw`, `int4_hnsw` and `bbq_hnsw` index types. Defaults to `false`.

docs/reference/query-languages/esql/_snippets/commands/examples/fork.csv-spec/simpleFork.md

@@ -0,0 +1,14 @@
+% This is generated by ESQL's AbstractFunctionTestCase. Do not edit it. See ../README.md for how to regenerate it.
+
+```esql
+FROM employees
+| FORK ( WHERE emp_no == 10001 )
+       ( WHERE emp_no == 10002 )
+| KEEP emp_no, _fork
+| SORT emp_no
+```
+
+| emp_no:integer | _fork:keyword |
+| --- | --- |
+| 10001 | fork1 |
+| 10002 | fork2 |

docs/reference/query-languages/esql/_snippets/commands/examples/fork.csv-spec/simpleForkWithStats.md

@@ -0,0 +1,19 @@
+% This is generated by ESQL's AbstractFunctionTestCase. Do not edit it. See ../README.md for how to regenerate it.
+
+```esql
+FROM books METADATA _score
+| WHERE author:"Faulkner"
+| EVAL score = round(_score, 2)
+| FORK (SORT score DESC, author | LIMIT 5 | KEEP author, score)
+       (STATS total = COUNT(*))
+| SORT _fork, score DESC, author
+```
+
+| author:text | score:double | _fork:keyword | total:long |
+| --- | --- | --- | --- |
+| William Faulkner | 2.39 | fork1 | null |
+| William Faulkner | 2.39 | fork1 | null |
+| Colleen Faulkner | 1.59 | fork1 | null |
+| Danny Faulkner | 1.59 | fork1 | null |
+| Keith Faulkner | 1.59 | fork1 | null |
+| null | null | fork2 | 18 |

docs/reference/query-languages/esql/_snippets/commands/layout/fork.md

@@ -0,0 +1,57 @@
+## `FORK` [esql-fork]
+
+```yaml {applies_to}
+serverless: preview
+stack: preview 9.1.0
+```
+
+The `FORK` processing command creates multiple execution branches to operate
+on the same input data and combines the results in a single output table.
+
+**Syntax**
+
+```esql
+FORK ( <processing_commands> ) ( <processing_commands> ) ... ( <processing_commands> )
+```
+
+**Description**
+
+The `FORK` processing command creates multiple execution branches to operate
+on the same input data and combines the results in a single output table. A discriminator column (`_fork`) is added to identify which branch each row came from.
+
+**Branch identification:**
+- The `_fork` column identifies each branch with values like `fork1`, `fork2`, `fork3`
+- Values correspond to the order branches are defined
+- `fork1` always indicates the first branch
+
+**Column handling:**
+- `FORK` branches can output different columns
+- Columns with the same name must have the same data type across all branches  
+- Missing columns are filled with `null` values
+
+**Row ordering:**
+- `FORK` preserves row order within each branch
+- Rows from different branches may be interleaved
+- Use `SORT _fork` to group results by branch
+
+::::{note}
+`FORK` branches default to `LIMIT 1000` if no `LIMIT` is provided.
+::::
+
+**Limitations**
+
+- `FORK` supports at most 8 execution branches.
+- Using remote cluster references and `FORK` is not supported.
+- Using more than one `FORK` command in a query is not supported.
+
+**Examples**
+
+In the following example, each `FORK` branch returns one row.
+Notice how `FORK` adds a `_fork` column that indicates which row the branch originates from:
+
+:::{include} ../examples/fork.csv-spec/simpleFork.md
+
+The next example, returns total number of rows that match the query along with
+the top five rows sorted by score.
+
+:::{include} ../examples/fork.csv-spec/simpleForkWithStats.md