Examples with MergeEngine io.shardingjdbc.core.merger.MergeEngine used on opensource projects

Example 1 with MergeEngine

use of io.shardingjdbc.core.merger.MergeEngine in project sharding-jdbc by shardingjdbc.

the class ShardingPreparedStatement method executeQuery.

@Override
public ResultSet executeQuery() throws SQLException {
    ResultSet result;
    try {
        Collection<PreparedStatementUnit> preparedStatementUnits = route();
        List<ResultSet> resultSets = new PreparedStatementExecutor(getConnection().getShardingContext().getExecutorEngine(), routeResult.getSqlStatement().getType(), preparedStatementUnits, getParameters()).executeQuery();
        List<QueryResult> queryResults = new ArrayList<>(resultSets.size());
        for (ResultSet each : resultSets) {
            queryResults.add(new JDBCQueryResult(each));
        }
        MergeEngine mergeEngine = MergeEngineFactory.newInstance(connection.getShardingContext().getShardingRule(), queryResults, routeResult.getSqlStatement());
        result = new ShardingResultSet(resultSets, mergeEngine.merge(), this);
    } finally {
        clearBatch();
    }
    currentResultSet = result;
    return result;
}

Example 2 with MergeEngine

use of io.shardingjdbc.core.merger.MergeEngine in project sharding-jdbc by shardingjdbc.

the class ShardingStatement method getResultSet.

@Override
public ResultSet getResultSet() throws SQLException {
    if (null != currentResultSet) {
        return currentResultSet;
    }
    if (1 == routedStatements.size() && routeResult.getSqlStatement() instanceof DQLStatement) {
        currentResultSet = routedStatements.iterator().next().getResultSet();
        return currentResultSet;
    }
    List<ResultSet> resultSets = new ArrayList<>(routedStatements.size());
    List<QueryResult> queryResults = new ArrayList<>(routedStatements.size());
    for (Statement each : routedStatements) {
        ResultSet resultSet = each.getResultSet();
        resultSets.add(resultSet);
        queryResults.add(new JDBCQueryResult(resultSet));
    }
    if (routeResult.getSqlStatement() instanceof SelectStatement || routeResult.getSqlStatement() instanceof DALStatement) {
        MergeEngine mergeEngine = MergeEngineFactory.newInstance(connection.getShardingContext().getShardingRule(), queryResults, routeResult.getSqlStatement());
        currentResultSet = new ShardingResultSet(resultSets, mergeEngine.merge(), this);
    }
    return currentResultSet;
}

Example 3 with MergeEngine

use of io.shardingjdbc.core.merger.MergeEngine in project sharding-jdbc by shardingjdbc.

the class ShardingStatement method executeQuery.

@Override
public ResultSet executeQuery(final String sql) throws SQLException {
    ResultSet result;
    try {
        List<ResultSet> resultSets = generateExecutor(sql).executeQuery();
        List<QueryResult> queryResults = new ArrayList<>(resultSets.size());
        for (ResultSet each : resultSets) {
            queryResults.add(new JDBCQueryResult(each));
        }
        MergeEngine mergeEngine = MergeEngineFactory.newInstance(connection.getShardingContext().getShardingRule(), queryResults, routeResult.getSqlStatement());
        result = new ShardingResultSet(resultSets, mergeEngine.merge(), this);
    } finally {
        currentResultSet = null;
    }
    currentResultSet = result;
    return result;
}

Example 4 with MergeEngine

use of io.shardingjdbc.core.merger.MergeEngine in project sharding-jdbc by shardingjdbc.

the class ShardingPreparedStatement method getResultSet.

@Override
public ResultSet getResultSet() throws SQLException {
    if (null != currentResultSet) {
        return currentResultSet;
    }
    if (1 == routedStatements.size() && routeResult.getSqlStatement() instanceof DQLStatement) {
        currentResultSet = routedStatements.iterator().next().getResultSet();
        return currentResultSet;
    }
    List<ResultSet> resultSets = new ArrayList<>(routedStatements.size());
    List<QueryResult> queryResults = new ArrayList<>(routedStatements.size());
    for (PreparedStatement each : routedStatements) {
        ResultSet resultSet = each.getResultSet();
        resultSets.add(resultSet);
        queryResults.add(new JDBCQueryResult(resultSet));
    }
    if (routeResult.getSqlStatement() instanceof SelectStatement || routeResult.getSqlStatement() instanceof DALStatement) {
        MergeEngine mergeEngine = MergeEngineFactory.newInstance(connection.getShardingContext().getShardingRule(), queryResults, routeResult.getSqlStatement());
        currentResultSet = new ShardingResultSet(resultSets, mergeEngine.merge(), this);
    }
    return currentResultSet;
}