Module custom 

Custom parameters: the names a session may set without a definition, which PostgreSQL keeps as string placeholders (assignable_custom_variable_name).

Functions

check_assignable_custom_name

Check that a session may create a placeholder for name, which no definition names: a valid custom name outside every prefix that a loaded library reserves.

reserved_placeholder_warning

The warning that removes a placeholder whose prefix a library reserves as it loads (MarkGUCPrefixReserved).

unrecognized_parameter

unrecognized configuration parameter "name", which SHOW, RESET of a single-part name and current_setting report for a name nothing defines.

valid_custom_name

Whether name is two or more simple identifiers separated by dots (valid_custom_variable_name). A component starts with a letter, an underscore or a byte of a multibyte character, and continues with those, digits and $.