org.apache.pinot.client.PreparedStatement Maven / Gradle / Ivy
/**
* 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.pinot.client;
import java.util.concurrent.Future;
/**
* A prepared statement, which is used to escape query parameters sent to Pinot.
*/
public class PreparedStatement {
private final Connection _connection;
private final String _statement;
private final String[] _parameters;
private final String _queryFormat;
@Deprecated
PreparedStatement(Connection connection, String query) {
_connection = connection;
_statement = query;
_parameters = new String[getQuestionMarkCount(query)];
_queryFormat = "pql";
}
PreparedStatement(Connection connection, Request request) {
_connection = connection;
_statement = request.getQuery();
_parameters = new String[getQuestionMarkCount(request.getQuery())];
_queryFormat = request.getQueryFormat();
}
private int getQuestionMarkCount(String query) {
int questionMarkCount = 0;
int index = query.indexOf('?');
while (index != -1) {
questionMarkCount++;
index = query.indexOf('?', index + 1);
}
return questionMarkCount;
}
private String fillStatementWithParameters() {
String statement = _statement;
for (String parameter : _parameters) {
statement = statement.replaceFirst("\\?", parameter);
}
return statement;
}
/**
* Executes this prepared statement.
*
* @return The query results
*/
public ResultSetGroup execute() {
return _connection.execute(new Request(_queryFormat, fillStatementWithParameters()));
}
/**
* Executes this prepared statement asynchronously.
*
* @return The query results
*/
public Future executeAsync() {
return _connection.executeAsync(new Request(_queryFormat, fillStatementWithParameters()));
}
/**
* Replaces the given parameter by its value.
*
* @param parameterIndex The index of the parameter to replace
* @param value The value of the parameter to replace
*/
public void setString(int parameterIndex, String value) {
_parameters[parameterIndex] = "'" + value.replace("'", "''") + "'";
}
/**
* Replaces the given parameter by its value.
*
* @param parameterIndex The index of the parameter to replace
* @param value The value of the parameter to replace
*/
public void setInt(int parameterIndex, int value) {
_parameters[parameterIndex] = String.valueOf(value);
}
/**
* Replaces the given parameter by its value.
*
* @param parameterIndex The index of the parameter to replace
* @param value The value of the parameter to replace
*/
public void setLong(int parameterIndex, long value) {
_parameters[parameterIndex] = String.valueOf(value);
}
/**
* Replaces the given parameter by its value.
*
* @param parameterIndex The index of the parameter to replace
* @param value The value of the parameter to replace
*/
public void setFloat(int parameterIndex, float value) {
_parameters[parameterIndex] = String.valueOf(value);
}
/**
* Replaces the given parameter by its value.
*
* @param parameterIndex The index of the parameter to replace
* @param value The value of the parameter to replace
*/
public void setDouble(int parameterIndex, double value) {
_parameters[parameterIndex] = String.valueOf(value);
}
}