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  package org.apache.cayenne.dba.postgres;
  
  import org.apache.cayenne.access.DataNode;
  import org.apache.cayenne.access.jdbc.BatchAction;
  import org.apache.cayenne.dba.DbAdapter;
  import org.apache.cayenne.map.DbAttribute;
  import org.apache.cayenne.query.BatchQuery;
  
  import java.sql.Connection;
  import java.sql.PreparedStatement;
  import java.sql.SQLException;
  import java.util.Arrays;
  import java.util.Collection;
  
  public class PostgresBatchAction extends BatchAction {
  
      /**
       * @since 4.0
       */
      public PostgresBatchAction(BatchQuery query, DataNode dataNode, boolean runningAsBatch) {
          super(query, dataNode, runningAsBatch);
      }
  
      @Override
      protected PreparedStatement prepareStatement(Connection connection, String queryStr,
                                                   DbAdapter adapter, boolean generatedKeys) throws SQLException {
          if (generatedKeys) {
              Collection<DbAttribute> generatedAttributes = query.getDbEntity().getGeneratedAttributes();
              String[] generatedPKColumns = new String[generatedAttributes.size()];
  
              int i = 0;
              for (DbAttribute generatedAttribute : generatedAttributes) {
                  if (generatedAttribute.isPrimaryKey()) {
                      generatedPKColumns[i++] = generatedAttribute.getName().toLowerCase();
                  }
              }
  
              return connection.prepareStatement(queryStr, Arrays.copyOf(generatedPKColumns, i));
          }
  
          return connection.prepareStatement(queryStr);
      }
  
  }
  