presto-parser/src/main/java/io/prestosql/sql/SqlFormatter.java/SqlFormatter/visitShowTables
class SqlFormatter:        @Override
        protected Void visitShowTables(ShowTables node, Integer context)
        {
            builder.append("SHOW TABLES");

            node.getSchema().ifPresent(value ->
                    builder.append(" FROM ")
                            .append(formatName(value)));

            node.getLikePattern().ifPresent(value ->
                    builder.append(" LIKE ")
                            .append(formatStringLiteral(value)));

            node.getEscape().ifPresent(value ->
                    builder.append(" ESCAPE ")
                            .append(formatStringLiteral(value)));

            return null;
        }