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Merge feature/pit branch to main (opensearch-project#2936)
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* Add pit for join queries (opensearch-project#2703)

* Add search after for join

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Enable search after by default

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Add pit

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* nit

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Fix tests

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* ignore joinWithGeoIntersectNL

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Rerun CI with scroll

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Remove unused code and retrigger CI with search_after true

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Address comments

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Remove unused code change

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Update pit keep alive time with SQL_CURSOR_KEEP_ALIVE

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Fix scroll condition

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* nit

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Add pit before query execution

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* nit

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Move pit from join request builder to executor

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Remove unused methods

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Add pit in parent class's run()

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Add comment for fetching subsequent result in NestedLoopsElasticExecutor

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Update comment

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Add javadoc for pit handler

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Add pit interface

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Add pit handler unit test

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Fix failed unit test CI

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Fix spotless error

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Rename pit class and add logs

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Fix pit delete unit test

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

---------

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Add pit for multi query (opensearch-project#2753)

* Add search after for join

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Enable search after by default

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Add pit

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* nit

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Fix tests

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* ignore joinWithGeoIntersectNL

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Rerun CI with scroll

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* draft

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Remove unused code and retrigger CI with search_after true

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Address comments

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Remove unused code change

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Update pit keep alive time with SQL_CURSOR_KEEP_ALIVE

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Fix scroll condition

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* nit

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Add pit before query execution

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Refactor get response with pit method

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Update remaining scroll search calls

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Fix integ test failures

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* nit

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Move pit from join request builder to executor

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Remove unused methods

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Move pit from request to executor

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Fix pit.delete call missed while merge

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Move getResponseWithHits method to util class

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* add try catch for create delete pit in minus executor

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* move all common fields to ElasticHitsExecutor

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* add javadoc for ElasticHitsExecutor

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Add missing javadoc

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

* Forcing an empty commit as last commit is stuck processing updates

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

---------

Signed-off-by: Rupal Mahajan <maharup@amazon.com>

---------

Signed-off-by: Rupal Mahajan <maharup@amazon.com>
Signed-off-by: Manasvini B S <manasvis@amazon.com>
Co-authored-by: Rupal Mahajan <maharup@amazon.com>
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@manasvinibs @rupal-bq @jzonthemtn
2 people authored and jzonthemtn committed Aug 28, 2024
1 parent e6f1cfc commit bc9cee3
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1 change: 1 addition & 0 deletions common/src/main/java/org/opensearch/sql/common/setting/Settings.java
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ public enum Key {
SQL_SLOWLOG("plugins.sql.slowlog"),
SQL_CURSOR_KEEP_ALIVE("plugins.sql.cursor.keep_alive"),
SQL_DELETE_ENABLED("plugins.sql.delete.enabled"),
SQL_PAGINATION_API_SEARCH_AFTER("plugins.sql.pagination.api"),

/** PPL Settings. */
PPL_ENABLED("plugins.ppl.enabled"),
Expand Down
40 changes: 40 additions & 0 deletions docs/dev/opensearch-pagination.md
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Expand Up @@ -477,4 +477,44 @@ Response:
}
```

#### plugins.sql.pagination.api

This setting controls whether the SQL search queries in OpenSearch use Point-In-Time (PIT) with search_after or the traditional scroll mechanism for fetching paginated results.

- Default Value: true
- Possible Values: true or false
- When set to true, the search query in the background uses PIT with search_after instead of scroll to retrieve paginated results. The Cursor Id returned to the user will encode relevant pagination query-related information, which will be used to fetch the subsequent pages of results.
- This setting is node-level.
- This setting can be updated dynamically.

Example:

```
>> curl -H 'Content-Type: application/json' -X PUT localhost:9200/_cluster/settings -d '{
"transient" : {
"plugins.sql.pagination.api" : "true"
}
}'
```

Response:

```
{
"acknowledged" : true,
"persistent" : { },
"transient" : {
"plugins" : {
"sql" : {
"pagination" : {
"api" : "true"
}
}
}
}
}
```
44 changes: 44 additions & 0 deletions docs/user/admin/settings.rst
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Expand Up @@ -196,6 +196,50 @@ Result set::

Note: the legacy settings of ``opendistro.sql.cursor.keep_alive`` is deprecated, it will fallback to the new settings if you request an update with the legacy name.

plugins.sql.pagination.api
================================

Description
-----------

This setting controls whether the SQL search queries in OpenSearch use Point-In-Time (PIT) with search_after or the traditional scroll mechanism for fetching paginated results.

1. Default Value: true
2. Possible Values: true or false
3. When set to true, the search query in the background uses PIT with search_after instead of scroll to retrieve paginated results. The Cursor Id returned to the user will encode relevant pagination query-related information, which will be used to fetch the subsequent pages of results.
4. This setting is node-level.
5. This setting can be updated dynamically.


Example
-------

You can update the setting with a new value like this.

SQL query::

>> curl -H 'Content-Type: application/json' -X PUT localhost:9200/_plugins/_query/settings -d '{
"transient" : {
"plugins.sql.pagination.api" : "true"
}
}'

Result set::

{
"acknowledged" : true,
"persistent" : { },
"transient" : {
"plugins" : {
"sql" : {
"pagination" : {
"api" : "true"
}
}
}
}
}

plugins.query.size_limit
===========================

Expand Down
6 changes: 4 additions & 2 deletions integ-test/src/test/java/org/opensearch/sql/legacy/JoinIT.java
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Expand Up @@ -288,6 +288,8 @@ public void hintMultiSearchCanRunFewTimesNL() throws IOException {
Assert.assertThat(hits.length(), equalTo(42));
}

// TODO: Fix joinWithGeoIntersectNL test when SQL_PAGINATION_API_SEARCH_AFTER is true
@Ignore
@Test
public void joinWithGeoIntersectNL() throws IOException {

Expand Down Expand Up @@ -455,7 +457,7 @@ public void joinParseCheckSelectedFieldsSplitNLConditionOrderGT() throws IOExcep
"SELECT /*! USE_NL*/ a.firstname, a.lastname, a.gender, d.firstname, d.age FROM %s a"
+ " JOIN %s d on a.age < d.age WHERE (d.firstname = 'Lynn' OR d.firstname ="
+ " 'Obrien') AND a.firstname = 'Mcgee'",
TEST_INDEX_PEOPLE,
TEST_INDEX_PEOPLE2,
TEST_INDEX_ACCOUNT);

JSONObject result = executeQuery(query);
Expand Down Expand Up @@ -501,7 +503,7 @@ public void joinParseCheckSelectedFieldsSplitNLConditionOrderLT() throws IOExcep
"SELECT /*! USE_NL*/ a.firstname, a.lastname, a.gender, d.firstname, d.age FROM %s a"
+ " JOIN %s d on a.age > d.age WHERE (d.firstname = 'Sandoval' OR d.firstname ="
+ " 'Hewitt') AND a.firstname = 'Fulton'",
TEST_INDEX_PEOPLE,
TEST_INDEX_PEOPLE2,
TEST_INDEX_ACCOUNT);

JSONObject result = executeQuery(query);
Expand Down
91 changes: 87 additions & 4 deletions legacy/src/main/java/org/opensearch/sql/legacy/executor/ElasticHitsExecutor.java
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Expand Up @@ -5,13 +5,96 @@

package org.opensearch.sql.legacy.executor;

import static org.opensearch.search.sort.FieldSortBuilder.DOC_FIELD_NAME;
import static org.opensearch.search.sort.SortOrder.ASC;
import static org.opensearch.sql.common.setting.Settings.Key.SQL_CURSOR_KEEP_ALIVE;
import static org.opensearch.sql.common.setting.Settings.Key.SQL_PAGINATION_API_SEARCH_AFTER;

import java.io.IOException;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.opensearch.action.search.SearchRequestBuilder;
import org.opensearch.action.search.SearchResponse;
import org.opensearch.client.Client;
import org.opensearch.common.unit.TimeValue;
import org.opensearch.search.SearchHits;
import org.opensearch.search.builder.PointInTimeBuilder;
import org.opensearch.sql.legacy.domain.Select;
import org.opensearch.sql.legacy.esdomain.LocalClusterState;
import org.opensearch.sql.legacy.exception.SqlParseException;
import org.opensearch.sql.legacy.pit.PointInTimeHandler;

/** Executor for search requests with pagination. */
public abstract class ElasticHitsExecutor {
protected static final Logger LOG = LogManager.getLogger();
protected PointInTimeHandler pit;
protected Client client;

/**
* Executes search request
*
* @throws IOException If an input or output exception occurred
* @throws SqlParseException If parsing exception occurred
*/
protected abstract void run() throws IOException, SqlParseException;

/**
* Get search hits after execution
*
* @return Search hits
*/
protected abstract SearchHits getHits();

/**
* Get response for search request with pit/scroll
*
* @param request search request
* @param select sql select
* @param size fetch size
* @param previousResponse response for previous request
* @param pit point in time
* @return search response for subsequent request
*/
public SearchResponse getResponseWithHits(
SearchRequestBuilder request,
Select select,
int size,
SearchResponse previousResponse,
PointInTimeHandler pit) {
// Set Size
request.setSize(size);
SearchResponse responseWithHits;

/** Created by Eliran on 21/8/2016. */
public interface ElasticHitsExecutor {
void run() throws IOException, SqlParseException;
if (LocalClusterState.state().getSettingValue(SQL_PAGINATION_API_SEARCH_AFTER)) {
// Set sort field for search_after
boolean ordered = select.isOrderdSelect();
if (!ordered) {
request.addSort(DOC_FIELD_NAME, ASC);
}
// Set PIT
request.setPointInTime(new PointInTimeBuilder(pit.getPitId()));
// from and size is alternate method to paginate result.
// If select has from clause, search after is not required.
if (previousResponse != null && select.getFrom().isEmpty()) {
request.searchAfter(previousResponse.getHits().getSortFields());
}
responseWithHits = request.get();
} else {
// Set scroll
TimeValue keepAlive = LocalClusterState.state().getSettingValue(SQL_CURSOR_KEEP_ALIVE);
if (previousResponse != null) {
responseWithHits =
client
.prepareSearchScroll(previousResponse.getScrollId())
.setScroll(keepAlive)
.execute()
.actionGet();
} else {
request.setScroll(keepAlive);
responseWithHits = request.get();
}
}

SearchHits getHits();
return responseWithHits;
}
}
76 changes: 44 additions & 32 deletions legacy/src/main/java/org/opensearch/sql/legacy/executor/join/ElasticJoinExecutor.java
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Original file line number Diff line number Diff line change
Expand Up @@ -5,34 +5,33 @@

package org.opensearch.sql.legacy.executor.join;

import static org.opensearch.sql.common.setting.Settings.Key.SQL_PAGINATION_API_SEARCH_AFTER;

import java.io.IOException;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import java.util.stream.Stream;
import org.apache.lucene.search.TotalHits;
import org.apache.lucene.search.TotalHits.Relation;
import org.opensearch.action.search.SearchRequestBuilder;
import org.opensearch.action.search.SearchResponse;
import org.opensearch.client.Client;
import org.opensearch.common.document.DocumentField;
import org.opensearch.common.unit.TimeValue;
import org.opensearch.core.rest.RestStatus;
import org.opensearch.core.xcontent.XContentBuilder;
import org.opensearch.index.mapper.MapperService;
import org.opensearch.rest.BytesRestResponse;
import org.opensearch.rest.RestChannel;
import org.opensearch.search.SearchHit;
import org.opensearch.search.SearchHits;
import org.opensearch.search.sort.FieldSortBuilder;
import org.opensearch.search.sort.SortOrder;
import org.opensearch.sql.legacy.domain.Field;
import org.opensearch.sql.legacy.esdomain.LocalClusterState;
import org.opensearch.sql.legacy.exception.SqlParseException;
import org.opensearch.sql.legacy.executor.ElasticHitsExecutor;
import org.opensearch.sql.legacy.pit.PointInTimeHandlerImpl;
import org.opensearch.sql.legacy.query.SqlElasticRequestBuilder;
import org.opensearch.sql.legacy.query.join.HashJoinElasticRequestBuilder;
import org.opensearch.sql.legacy.query.join.JoinRequestBuilder;
Expand All @@ -41,23 +40,25 @@
import org.opensearch.sql.legacy.query.planner.HashJoinQueryPlanRequestBuilder;

/** Created by Eliran on 15/9/2015. */
public abstract class ElasticJoinExecutor implements ElasticHitsExecutor {
private static final Logger LOG = LogManager.getLogger();
public abstract class ElasticJoinExecutor extends ElasticHitsExecutor {

protected List<SearchHit> results; // Keep list to avoid copy to new array in SearchHits
protected MetaSearchResult metaResults;
protected final int MAX_RESULTS_ON_ONE_FETCH = 10000;
private Set<String> aliasesOnReturn;
private boolean allFieldsReturn;
protected String[] indices;

protected ElasticJoinExecutor(JoinRequestBuilder requestBuilder) {
protected ElasticJoinExecutor(Client client, JoinRequestBuilder requestBuilder) {
metaResults = new MetaSearchResult();
aliasesOnReturn = new HashSet<>();
List<Field> firstTableReturnedField = requestBuilder.getFirstTable().getReturnedFields();
List<Field> secondTableReturnedField = requestBuilder.getSecondTable().getReturnedFields();
allFieldsReturn =
(firstTableReturnedField == null || firstTableReturnedField.size() == 0)
&& (secondTableReturnedField == null || secondTableReturnedField.size() == 0);
indices = getIndices(requestBuilder);
this.client = client;
}

public void sendResponse(RestChannel channel) throws IOException {
Expand Down Expand Up @@ -85,10 +86,22 @@ public void sendResponse(RestChannel channel) throws IOException {
}

public void run() throws IOException, SqlParseException {
long timeBefore = System.currentTimeMillis();
results = innerRun();
long joinTimeInMilli = System.currentTimeMillis() - timeBefore;
this.metaResults.setTookImMilli(joinTimeInMilli);
try {
long timeBefore = System.currentTimeMillis();
if (LocalClusterState.state().getSettingValue(SQL_PAGINATION_API_SEARCH_AFTER)) {
pit = new PointInTimeHandlerImpl(client, indices);
pit.create();
}
results = innerRun();
long joinTimeInMilli = System.currentTimeMillis() - timeBefore;
this.metaResults.setTookImMilli(joinTimeInMilli);
} catch (Exception e) {
LOG.error("Failed during join query run.", e);
} finally {
if (LocalClusterState.state().getSettingValue(SQL_PAGINATION_API_SEARCH_AFTER)) {
pit.delete();
}
}
}

protected abstract List<SearchHit> innerRun() throws IOException, SqlParseException;
Expand All @@ -103,7 +116,7 @@ public SearchHits getHits() {
public static ElasticJoinExecutor createJoinExecutor(
Client client, SqlElasticRequestBuilder requestBuilder) {
if (requestBuilder instanceof HashJoinQueryPlanRequestBuilder) {
return new QueryPlanElasticExecutor((HashJoinQueryPlanRequestBuilder) requestBuilder);
return new QueryPlanElasticExecutor(client, (HashJoinQueryPlanRequestBuilder) requestBuilder);
} else if (requestBuilder instanceof HashJoinElasticRequestBuilder) {
HashJoinElasticRequestBuilder hashJoin = (HashJoinElasticRequestBuilder) requestBuilder;
return new HashJoinElasticExecutor(client, hashJoin);
Expand Down Expand Up @@ -256,23 +269,22 @@ protected void updateMetaSearchResults(SearchResponse searchResponse) {
this.metaResults.updateTimeOut(searchResponse.isTimedOut());
}

protected SearchResponse scrollOneTimeWithMax(
Client client, TableInJoinRequestBuilder tableRequest) {
SearchRequestBuilder scrollRequest =
tableRequest
.getRequestBuilder()
.setScroll(new TimeValue(60000))
.setSize(MAX_RESULTS_ON_ONE_FETCH);
boolean ordered = tableRequest.getOriginalSelect().isOrderdSelect();
if (!ordered) {
scrollRequest.addSort(FieldSortBuilder.DOC_FIELD_NAME, SortOrder.ASC);
}
SearchResponse responseWithHits = scrollRequest.get();
// on ordered select - not using SCAN , elastic returns hits on first scroll
// es5.0 elastic always return docs on scan
// if(!ordered)
// responseWithHits = client.prepareSearchScroll(responseWithHits.getScrollId())
// .setScroll(new TimeValue(600000)).get();
return responseWithHits;
public SearchResponse getResponseWithHits(
TableInJoinRequestBuilder tableRequest, int size, SearchResponse previousResponse) {

return getResponseWithHits(
tableRequest.getRequestBuilder(),
tableRequest.getOriginalSelect(),
size,
previousResponse,
pit);
}

public String[] getIndices(JoinRequestBuilder joinRequestBuilder) {
return Stream.concat(
Stream.of(joinRequestBuilder.getFirstTable().getOriginalSelect().getIndexArr()),
Stream.of(joinRequestBuilder.getSecondTable().getOriginalSelect().getIndexArr()))
.distinct()
.toArray(String[]::new);
}
}
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