FirebirdSQL logo
 About the Firebird 5.0 Language ReferenceData Types and Subtypes 

Comments

Comments may be present in SQL scripts, SQL statements and PSQL modules.A comment can be any text, usually used to document how particular parts of the code work.The parser ignores the text of comments.

Firebird supports two types of comments: block (or bracketed) and in-line (or simple).

Syntax
<comment> ::= <block comment> | <single-line comment>

<block comment> ::=
  /* <character>[<character> ...] */

<single-line comment> ::=
  -- <character>[<character> ...]<end line>

Block comments start with the /* character pair and end with the */ character pair.Text in block comments may be of any length and can occupy multiple lines.

In-line comments start with a pair of hyphen characters, -- and continue until the first linebreak (end of line).

Example
CREATE PROCEDURE P(APARAM INT)
  RETURNS (B INT)
AS
BEGIN
  /* This text will be ignored during the execution of the statement
     since it is a comment
  */
  B = A + 1; -- In-line comment
  SUSPEND;
END