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Signed-off-by: Vamsi Manohar <[email protected]>
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196
plugin/src/main/java/org/opensearch/sql/plugin/queryengine/PPLQueryEngine.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,196 @@ | ||
| package org.opensearch.sql.plugin.queryengine; | ||
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| import java.io.IOException; | ||
| import java.util.ArrayList; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
| import java.util.Locale; | ||
| import org.apache.lucene.search.TotalHits; | ||
| import org.opensearch.action.search.SearchRequest; | ||
| import org.opensearch.action.search.SearchResponse; | ||
| import org.opensearch.action.search.ShardSearchFailure; | ||
| import org.opensearch.core.ParseField; | ||
| import org.opensearch.core.action.ActionListener; | ||
| import org.opensearch.core.common.io.stream.StreamInput; | ||
| import org.opensearch.core.common.io.stream.StreamOutput; | ||
| import org.opensearch.core.xcontent.XContentBuilder; | ||
| import org.opensearch.core.xcontent.XContentParser; | ||
| import org.opensearch.search.SearchHit; | ||
| import org.opensearch.search.SearchHits; | ||
| import org.opensearch.search.aggregations.InternalAggregations; | ||
| import org.opensearch.search.externalengine.QueryEngine; | ||
| import org.opensearch.search.externalengine.QueryEngineExtBuilder; | ||
| import org.opensearch.search.internal.InternalSearchResponse; | ||
| import org.opensearch.sql.common.response.ResponseListener; | ||
| import org.opensearch.sql.data.model.ExprValue; | ||
| import org.opensearch.sql.executor.ExecutionEngine; | ||
| import org.opensearch.sql.ppl.PPLService; | ||
| import org.opensearch.sql.ppl.domain.PPLQueryRequest; | ||
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| public class PPLQueryEngine extends QueryEngine { | ||
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| public static final String NAME = "ppl"; | ||
| private static PPLService pplService; | ||
| private String query; | ||
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| public static void initialize(PPLService pplService) { | ||
| PPLQueryEngine.pplService = pplService; | ||
| } | ||
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| @Override | ||
| public void executeQuery( | ||
| SearchRequest searchRequest, ActionListener<SearchResponse> actionListener) { | ||
| PPLQueryRequest pplQueryRequest = new PPLQueryRequest(query, null, "_search", "json"); | ||
| pplService.execute( | ||
| pplQueryRequest, | ||
| new ResponseListener<>() { | ||
| @Override | ||
| public void onResponse(ExecutionEngine.QueryResponse queryResponse) { | ||
| SearchResponse searchResponse = | ||
| transformFromQueryResponseToSearchResponse(queryResponse); | ||
| actionListener.onResponse(searchResponse); | ||
| } | ||
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| @Override | ||
| public void onFailure(Exception e) { | ||
| actionListener.onFailure(e); | ||
| } | ||
| }); | ||
| } | ||
|
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| private SearchResponse transformFromQueryResponseToSearchResponse( | ||
| ExecutionEngine.QueryResponse queryResponse) { | ||
| SearchHit[] hits = new SearchHit[0]; | ||
| return new SearchResponse( | ||
| new InternalSearchResponse( | ||
| new SearchHits(hits, new TotalHits(0L, TotalHits.Relation.EQUAL_TO), 0.0F), | ||
| (InternalAggregations) null, | ||
| null, | ||
| null, | ||
| false, | ||
| (Boolean) null, | ||
| 1, | ||
| Collections.emptyList(), | ||
| List.of(new PPLQueryEngine.PPLResponseExternalBuilder(queryResponse))), | ||
| (String) null, | ||
| 0, | ||
| 0, | ||
| 0, | ||
| 0L, | ||
| ShardSearchFailure.EMPTY_ARRAY, | ||
| SearchResponse.Clusters.EMPTY, | ||
| null); | ||
| } | ||
|
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| static class PPLResponseExternalBuilder extends QueryEngineExtBuilder { | ||
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| static ParseField DUMMY_FIELD = new ParseField("ppl"); | ||
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| protected final ExecutionEngine.QueryResponse queryResponse; | ||
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| public PPLResponseExternalBuilder(ExecutionEngine.QueryResponse queryResponse) { | ||
| this.queryResponse = queryResponse; | ||
| } | ||
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| public PPLResponseExternalBuilder(StreamInput in) throws IOException { | ||
| this.queryResponse = null; | ||
| } | ||
|
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| @Override | ||
| public String getWriteableName() { | ||
| return DUMMY_FIELD.getPreferredName(); | ||
| } | ||
|
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| @Override | ||
| public void writeTo(StreamOutput out) throws IOException { | ||
| out.writeString("1"); | ||
| } | ||
|
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| @Override | ||
| public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException { | ||
| // Serialize the schema | ||
| builder.startObject(NAME); | ||
| ArrayList<String> columnNames = new ArrayList<>(); | ||
| builder.startArray("schema"); | ||
| for (ExecutionEngine.Schema.Column column : queryResponse.getSchema().getColumns()) { | ||
| builder.startObject(); | ||
| String columnName = getColumnName(column); | ||
| columnNames.add(columnName); | ||
| builder.field("name", columnName); | ||
| builder.field("type", column.getExprType().typeName().toLowerCase(Locale.ROOT)); | ||
| builder.endObject(); | ||
| } | ||
| builder.endArray(); | ||
| builder.startArray("datarows"); | ||
| for (ExprValue result : queryResponse.getResults()) { | ||
| builder.startArray(); | ||
| for (String columnName : columnNames) { | ||
| builder.value(result.tupleValue().get(columnName).value()); | ||
| } | ||
| builder.endArray(); | ||
| } | ||
| builder.endArray(); | ||
| builder.field("total", queryResponse.getResults().size()); | ||
| builder.field("size", queryResponse.getResults().size()); | ||
| builder.endObject(); | ||
| return builder; | ||
| } | ||
|
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| @Override | ||
| public int hashCode() { | ||
| return 0; | ||
| } | ||
|
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| @Override | ||
| public boolean equals(Object obj) { | ||
| if (obj == null) { | ||
| return false; | ||
| } | ||
| return true; | ||
| } | ||
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| public static PPLQueryEngine.PPLResponseExternalBuilder parse(XContentParser parser) | ||
| throws IOException { | ||
| return null; | ||
| } | ||
|
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| private String getColumnName(ExecutionEngine.Schema.Column column) { | ||
| return (column.getAlias() != null) ? column.getAlias() : column.getName(); | ||
| } | ||
|
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| } | ||
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| public PPLQueryEngine(String query) { | ||
| this.query = query; | ||
| } | ||
|
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| public PPLQueryEngine(StreamInput in) {} | ||
|
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| @Override | ||
| public String getWriteableName() { | ||
| return NAME; | ||
| } | ||
|
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| @Override | ||
| public void writeTo(StreamOutput out) throws IOException {} | ||
|
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| @Override | ||
| public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException { | ||
| return null; | ||
| } | ||
|
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| public static QueryEngine fromXContent(XContentParser parser) throws IOException { | ||
| XContentParser.Token token; | ||
| String query = ""; | ||
| while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) { | ||
| String fieldName = parser.currentName(); | ||
| token = parser.nextToken(); | ||
| if (fieldName.equals("query")) { | ||
| query = parser.textOrNull(); | ||
| } | ||
| } | ||
| return new PPLQueryEngine(query); | ||
| } | ||
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|
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| } |
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