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SqlHorizonController.java
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SqlHorizonController.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.carbondata.horizon.rest.controller;
import java.util.List;
import org.apache.carbondata.horizon.rest.model.validate.RequestValidator;
import org.apache.carbondata.horizon.rest.model.view.SqlRequest;
import org.apache.carbondata.horizon.rest.model.view.SqlResponse;
import org.apache.carbondata.horizon.rest.sql.SparkSqlWrapper;
import org.apache.carbondata.store.api.exception.StoreException;
import org.apache.spark.sql.AnalysisException;
import org.apache.spark.sql.Dataset;
import org.apache.spark.sql.Row;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class SqlHorizonController {
@RequestMapping(value = "/table/sql", produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<SqlResponse> sql(@RequestBody SqlRequest request) throws StoreException {
RequestValidator.validateSql(request);
List<Row> rows;
Dataset<Row> sqlDataFrame = null;
try {
sqlDataFrame = SparkSqlWrapper.sql(SqlHorizon.getSession(),
request.getSqlStatement());
rows = sqlDataFrame
.collectAsList();
} catch (AnalysisException e) {
throw new StoreException(e.getSimpleMessage());
} catch (Exception e) {
throw new StoreException(e.getMessage());
}
Object[][] result = new Object[rows.size()+1][];
result[0] = sqlDataFrame.schema().fieldNames();
for (int i = 0; i < rows.size(); i++) {
Row row = rows.get(i);
result[i+1] = new Object[row.size()];
for (int j = 0; j < row.size(); j++) {
result[i+1][j] = row.get(j);
}
}
return new ResponseEntity<>(
new SqlResponse(request, "SUCCESS", result), HttpStatus.OK);
}
@RequestMapping(value = "echosql")
public ResponseEntity<String> echosql(@RequestParam(name = "name") String name) {
return new ResponseEntity<>(String.valueOf("Welcome to SQL, " + name), HttpStatus.OK);
}
}