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Extended QPT to athena-timestream (#1857)
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93
.../main/java/com/amazonaws/athena/connectors/timestream/qpt/TimestreamQueryPassthrough.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,93 @@ | ||
| /*- | ||
| * #%L | ||
| * athena-timestream | ||
| * %% | ||
| * Copyright (C) 2019 Amazon Web Services | ||
| * %% | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * #L% | ||
| */ | ||
| package com.amazonaws.athena.connectors.timestream.qpt; | ||
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| import com.amazonaws.athena.connector.lambda.metadata.optimizations.querypassthrough.QueryPassthroughSignature; | ||
| import com.google.common.collect.ImmutableSet; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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|
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| import java.util.Arrays; | ||
| import java.util.List; | ||
| import java.util.Locale; | ||
| import java.util.Map; | ||
| import java.util.Set; | ||
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| public class TimestreamQueryPassthrough implements QueryPassthroughSignature | ||
| { | ||
| // Constant value representing the name of the query. | ||
| public static final String NAME = "query"; | ||
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| // Constant value representing the domain of the query. | ||
| public static final String SCHEMA_NAME = "system"; | ||
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| // List of arguments for the query, statically initialized as it always contains the same value. | ||
| public static final String QUERY = "QUERY"; | ||
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| public static final List<String> ARGUMENTS = Arrays.asList(QUERY); | ||
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| private static final Logger LOGGER = LoggerFactory.getLogger(TimestreamQueryPassthrough.class); | ||
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| @Override | ||
| public String getFunctionSchema() | ||
| { | ||
| return SCHEMA_NAME; | ||
| } | ||
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| @Override | ||
| public String getFunctionName() | ||
| { | ||
| return NAME; | ||
| } | ||
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| @Override | ||
| public List<String> getFunctionArguments() | ||
| { | ||
| return ARGUMENTS; | ||
| } | ||
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| @Override | ||
| public Logger getLogger() | ||
| { | ||
| return LOGGER; | ||
| } | ||
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| @Override | ||
| public void customConnectorVerifications(Map<String, String> engineQptArguments) | ||
| { | ||
| String customerPassedQuery = engineQptArguments.get(QUERY); | ||
| String upperCaseStatement = customerPassedQuery.trim().toUpperCase(Locale.ENGLISH); | ||
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| // Immediately check if the statement starts with "SELECT" | ||
| if (!upperCaseStatement.startsWith("SELECT")) { | ||
| throw new UnsupportedOperationException("Statement does not start with SELECT."); | ||
| } | ||
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| // List of disallowed keywords | ||
| Set<String> disallowedKeywords = ImmutableSet.of("INSERT", "UPDATE", "DELETE", "CREATE", "DROP", "ALTER"); | ||
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| // Check if the statement contains any disallowed keywords | ||
| for (String keyword : disallowedKeywords) { | ||
| if (upperCaseStatement.contains(keyword)) { | ||
| throw new UnsupportedOperationException("Unaccepted operation; only SELECT statements are allowed. Found: " + keyword); | ||
| } | ||
| } | ||
| } | ||
| } |