PL/pgSQL reference conventions - Amazon Redshift
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PL/pgSQL reference conventions

In this section, you can find the conventions that are used to write the syntax for the PL/pgSQL stored procedure language.

Character Description
CAPS Words in capital letters are keywords.
[ ] Brackets denote optional arguments. Multiple arguments in brackets indicate that you can choose any number of the arguments. In addition, arguments in brackets on separate lines indicate that the Amazon Redshift parser expects the arguments to be in the order that they are listed in the syntax.
{ } Braces indicate that you are required to choose one of the arguments inside the braces.
| Pipes indicate that you can choose between the arguments.
red italics Words in red italics indicate placeholders. Insert the appropriate value in place of the word in red italics.
. . . An ellipsis indicates that you can repeat the preceding element.
' Words in single quotation marks indicate that you must type the quotes.