#class pq\Query\Expr

A query expression.

Properties:#

• protected string $expression#
  The expression.
• protected pq\Query\Expr $next#
  The next expression in a linked list.

Functions:#

• Expr::__construct#

  Create a new expression.

  void pq\Query\Expr::__construct(string $e[, string ...$args])

• Expr::__toString#

  Retrieve the string representation.

  string pq\Query\Expr::__toString()

• Expr::add#

  Add an expression at the end of the linked list.

  pq\Query\Expr pq\Query\Expr::add(pq\Query\Expr $next)

• Expr::isNull#

  Whether the expression is the literal NULL.

  bool pq\Query\Expr::isNull()