Refactor OpenSearch Relevance Functions out of Core #2019
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| package org.opensearch.sql.datasource.model; | ||
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| import static org.opensearch.sql.analysis.DataSourceSchemaIdentifierNameResolver.DEFAULT_DATASOURCE_NAME; | ||
| import static org.opensearch.sql.data.type.ExprCoreType.STRING; | ||
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| import com.google.common.collect.ImmutableMap; | ||
| import java.util.Map; | ||
| import java.util.Set; | ||
| import org.opensearch.sql.data.type.ExprType; | ||
| import org.opensearch.sql.datasource.DataSourceService; | ||
| import org.opensearch.sql.planner.logical.LogicalPlan; | ||
| import org.opensearch.sql.planner.physical.PhysicalPlan; | ||
| import org.opensearch.sql.storage.StorageEngine; | ||
| import org.opensearch.sql.storage.Table; | ||
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| public class EmptyDataSourceService { | ||
| private static DataSourceService emptyDataSourceService = | ||
| new DataSourceService() { | ||
| @Override | ||
| public DataSource getDataSource(String dataSourceName) { | ||
| return new DataSource( | ||
| DEFAULT_DATASOURCE_NAME, DataSourceType.OPENSEARCH, storageEngine()); | ||
| } | ||
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| @Override | ||
| public Set<DataSourceMetadata> getDataSourceMetadata(boolean isDefaultDataSourceRequired) { | ||
| return Set.of(); | ||
| } | ||
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| @Override | ||
| public DataSourceMetadata getDataSourceMetadata(String name) { | ||
| return null; | ||
| } | ||
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| @Override | ||
| public void createDataSource(DataSourceMetadata metadata) {} | ||
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| @Override | ||
| public void updateDataSource(DataSourceMetadata dataSourceMetadata) {} | ||
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| @Override | ||
| public void deleteDataSource(String dataSourceName) {} | ||
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| @Override | ||
| public Boolean dataSourceExists(String dataSourceName) { | ||
| return null; | ||
| } | ||
| }; | ||
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| private static StorageEngine storageEngine() { | ||
| Table table = | ||
| new Table() { | ||
| @Override | ||
| public boolean exists() { | ||
| return true; | ||
| } | ||
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| @Override | ||
| public void create(Map<String, ExprType> schema) { | ||
| throw new UnsupportedOperationException("Create table is not supported"); | ||
| } | ||
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| @Override | ||
| public Map<String, ExprType> getFieldTypes() { | ||
| return null; | ||
| } | ||
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| @Override | ||
| public PhysicalPlan implement(LogicalPlan plan) { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
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| public Map<String, ExprType> getReservedFieldTypes() { | ||
| return ImmutableMap.of("_test", STRING); | ||
| } | ||
| }; | ||
| return (dataSourceSchemaName, tableName) -> table; | ||
| } | ||
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| public static DataSourceService getEmptyDataSourceService() { | ||
| return emptyDataSourceService; | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| /* | ||
| * Copyright OpenSearch Contributors | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
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| package org.opensearch.sql.expression.function; | ||
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| import org.apache.commons.lang3.tuple.Pair; | ||
| import org.opensearch.sql.data.model.ExprValue; | ||
| import org.opensearch.sql.data.type.ExprType; | ||
| import org.opensearch.sql.expression.Expression; | ||
| import org.opensearch.sql.expression.FunctionExpression; | ||
| import org.opensearch.sql.expression.env.Environment; | ||
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| /** | ||
| * Nested Function Resolver returns a builder to resolve nested function expressions | ||
| */ | ||
| public class NestedFunctionResolver implements FunctionResolver { | ||
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| @Override | ||
| public Pair<FunctionSignature, FunctionBuilder> resolve(FunctionSignature unresolvedSignature) { | ||
| return Pair.of( | ||
| unresolvedSignature, | ||
| (functionProperties, arguments) -> | ||
| new FunctionExpression(BuiltinFunctionName.NESTED.getName(), arguments) { | ||
| @Override | ||
| public ExprValue valueOf(Environment<Expression, ExprValue> valueEnv) { | ||
| return valueEnv.resolve(getArguments().get(0)); | ||
| } | ||
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| @Override | ||
| public ExprType type() { | ||
| return getArguments().get(0).type(); | ||
| } | ||
| }); | ||
| } | ||
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| @Override | ||
| public FunctionName getFunctionName() { | ||
| return BuiltinFunctionName.NESTED.getName(); | ||
| } | ||
| } | ||
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Need a javadoc and a good description why it is here