<p>
This message includes an SQL command (or commands) expressed as a text string.
<p>
The possible response messages from the backend are
{@link CommandComplete}, {@link RowDesc}, {@link DataRow}, {@link EmptyQueryResponse}, {@link ErrorResponse},
{@link ReadyForQuery} and {@link NoticeResponse}
<p> This message includes an SQL command (or commands) expressed as a text string. <p> The possible response messages from the backend are {@link CommandComplete}, {@link RowDesc}, {@link DataRow}, {@link EmptyQueryResponse}, {@link ErrorResponse}, {@link ReadyForQuery} and {@link NoticeResponse}