Appendix B: Message Selector Syntax

Overview

A message selector is a string expression whose syntax is based on a subset of the SQL-92 conditional expression syntax. The syntax is composed of:

• Literals

• Identifiers

• Whitespace

• Expressions

• Logical operators

• Comparison operators

• Arithmetic operators

The tables below provide a handy reference of the main components and construction rules. Note that all selector syntax is case-insensitive.