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Prometheus Query Exemplars (opensearch-project#1782)
Signed-off-by: Vamsi Manohar <[email protected]>
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9 changes: 9 additions & 0 deletions
9
integ-test/src/test/resources/expectedOutput/ppl/explain_query_exemplars.json
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| { | ||
| "root": { | ||
| "name": "QueryExemplarsFunctionTableScanOperator", | ||
| "description": { | ||
| "request": "query_exemplars(app_ads_ad_requests_total, 1689228292, 1689232299)" | ||
| }, | ||
| "children": [] | ||
| } | ||
| } |
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105 changes: 105 additions & 0 deletions
105
...ensearch/sql/prometheus/functions/implementation/QueryExemplarFunctionImplementation.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| /* | ||
| * | ||
| * * Copyright OpenSearch Contributors | ||
| * * SPDX-License-Identifier: Apache-2.0 | ||
| * | ||
| */ | ||
|
|
||
| package org.opensearch.sql.prometheus.functions.implementation; | ||
|
|
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| import static org.opensearch.sql.prometheus.functions.resolver.QueryRangeTableFunctionResolver.ENDTIME; | ||
| import static org.opensearch.sql.prometheus.functions.resolver.QueryRangeTableFunctionResolver.QUERY; | ||
| import static org.opensearch.sql.prometheus.functions.resolver.QueryRangeTableFunctionResolver.STARTTIME; | ||
|
|
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| import java.util.List; | ||
| import java.util.stream.Collectors; | ||
| import org.opensearch.sql.data.model.ExprValue; | ||
| import org.opensearch.sql.data.type.ExprCoreType; | ||
| import org.opensearch.sql.data.type.ExprType; | ||
| import org.opensearch.sql.exception.ExpressionEvaluationException; | ||
| import org.opensearch.sql.expression.Expression; | ||
| import org.opensearch.sql.expression.FunctionExpression; | ||
| import org.opensearch.sql.expression.NamedArgumentExpression; | ||
| import org.opensearch.sql.expression.env.Environment; | ||
| import org.opensearch.sql.expression.function.FunctionName; | ||
| import org.opensearch.sql.expression.function.TableFunctionImplementation; | ||
| import org.opensearch.sql.prometheus.client.PrometheusClient; | ||
| import org.opensearch.sql.prometheus.request.PrometheusQueryExemplarsRequest; | ||
| import org.opensearch.sql.prometheus.storage.QueryExemplarsTable; | ||
| import org.opensearch.sql.storage.Table; | ||
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|
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| public class QueryExemplarFunctionImplementation extends FunctionExpression implements | ||
| TableFunctionImplementation { | ||
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|
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| private final FunctionName functionName; | ||
| private final List<Expression> arguments; | ||
| private final PrometheusClient prometheusClient; | ||
|
|
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| /** | ||
| * Required argument constructor. | ||
| * | ||
| * @param functionName name of the function | ||
| * @param arguments a list of arguments provided | ||
| */ | ||
| public QueryExemplarFunctionImplementation(FunctionName functionName, List<Expression> arguments, | ||
| PrometheusClient prometheusClient) { | ||
| super(functionName, arguments); | ||
| this.functionName = functionName; | ||
| this.arguments = arguments; | ||
| this.prometheusClient = prometheusClient; | ||
| } | ||
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| @Override | ||
| public ExprValue valueOf(Environment<Expression, ExprValue> valueEnv) { | ||
| throw new UnsupportedOperationException(String.format( | ||
| "Prometheus defined function [%s] is only " | ||
| + "supported in SOURCE clause with prometheus connector catalog", | ||
| functionName)); | ||
| } | ||
|
|
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| @Override | ||
| public ExprType type() { | ||
| return ExprCoreType.STRUCT; | ||
| } | ||
|
|
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| @Override | ||
| public String toString() { | ||
| List<String> args = arguments.stream() | ||
| .map(arg -> String.format("%s=%s", ((NamedArgumentExpression) arg) | ||
| .getArgName(), ((NamedArgumentExpression) arg).getValue().toString())) | ||
| .collect(Collectors.toList()); | ||
| return String.format("%s(%s)", functionName, String.join(", ", args)); | ||
| } | ||
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| @Override | ||
| public Table applyArguments() { | ||
| return new QueryExemplarsTable(prometheusClient, buildExemplarsQueryRequest(arguments)); | ||
| } | ||
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| private PrometheusQueryExemplarsRequest buildExemplarsQueryRequest(List<Expression> arguments) { | ||
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| PrometheusQueryExemplarsRequest request = new PrometheusQueryExemplarsRequest(); | ||
| arguments.forEach(arg -> { | ||
| String argName = ((NamedArgumentExpression) arg).getArgName(); | ||
| Expression argValue = ((NamedArgumentExpression) arg).getValue(); | ||
| ExprValue literalValue = argValue.valueOf(); | ||
| switch (argName) { | ||
| case QUERY: | ||
| request | ||
| .setQuery((String) literalValue.value()); | ||
| break; | ||
| case STARTTIME: | ||
| request.setStartTime(((Number) literalValue.value()).longValue()); | ||
| break; | ||
| case ENDTIME: | ||
| request.setEndTime(((Number) literalValue.value()).longValue()); | ||
| break; | ||
| default: | ||
| throw new ExpressionEvaluationException( | ||
| String.format("Invalid Function Argument:%s", argName)); | ||
| } | ||
| }); | ||
| return request; | ||
| } | ||
|
|
||
| } |
58 changes: 58 additions & 0 deletions
58
...org/opensearch/sql/prometheus/functions/resolver/QueryExemplarsTableFunctionResolver.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| /* | ||
| * Copyright OpenSearch Contributors | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
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| package org.opensearch.sql.prometheus.functions.resolver; | ||
|
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| import static org.opensearch.sql.data.type.ExprCoreType.LONG; | ||
| import static org.opensearch.sql.data.type.ExprCoreType.STRING; | ||
| import static org.opensearch.sql.prometheus.utils.TableFunctionUtils.getNamedArgumentsOfTableFunction; | ||
| import static org.opensearch.sql.prometheus.utils.TableFunctionUtils.validatePrometheusTableFunctionArguments; | ||
|
|
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| import java.util.List; | ||
| import lombok.RequiredArgsConstructor; | ||
| import org.apache.commons.lang3.tuple.Pair; | ||
| import org.opensearch.sql.expression.Expression; | ||
| import org.opensearch.sql.expression.function.FunctionBuilder; | ||
| import org.opensearch.sql.expression.function.FunctionName; | ||
| import org.opensearch.sql.expression.function.FunctionResolver; | ||
| import org.opensearch.sql.expression.function.FunctionSignature; | ||
| import org.opensearch.sql.prometheus.client.PrometheusClient; | ||
| import org.opensearch.sql.prometheus.functions.implementation.QueryExemplarFunctionImplementation; | ||
|
|
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| /** | ||
| * This class is for query_exemplars table function resolver {@link FunctionResolver}. | ||
| * It takes care of validating function arguments and also creating | ||
| * required {@link org.opensearch.sql.expression.function.TableFunctionImplementation} Class. | ||
| */ | ||
| @RequiredArgsConstructor | ||
| public class QueryExemplarsTableFunctionResolver implements FunctionResolver { | ||
|
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| private final PrometheusClient prometheusClient; | ||
| public static final String QUERY_EXEMPLARS = "query_exemplars"; | ||
|
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| public static final String QUERY = "query"; | ||
| public static final String STARTTIME = "starttime"; | ||
| public static final String ENDTIME = "endtime"; | ||
|
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| @Override | ||
| public Pair<FunctionSignature, FunctionBuilder> resolve(FunctionSignature unresolvedSignature) { | ||
| final FunctionName functionName = FunctionName.of(QUERY_EXEMPLARS); | ||
| FunctionSignature functionSignature = | ||
| new FunctionSignature(FunctionName.of(QUERY_EXEMPLARS), List.of(STRING, LONG, LONG)); | ||
| FunctionBuilder functionBuilder = (functionProperties, arguments) -> { | ||
| final List<String> argumentNames = List.of(QUERY, STARTTIME, ENDTIME); | ||
| validatePrometheusTableFunctionArguments(arguments, argumentNames); | ||
| List<Expression> namedArguments = getNamedArgumentsOfTableFunction(arguments, argumentNames); | ||
| return new QueryExemplarFunctionImplementation(functionName, | ||
| namedArguments, prometheusClient); | ||
| }; | ||
| return Pair.of(functionSignature, functionBuilder); | ||
| } | ||
|
|
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| @Override | ||
| public FunctionName getFunctionName() { | ||
| return FunctionName.of(QUERY_EXEMPLARS); | ||
| } | ||
| } |
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