Function get_funcs_for_compression

src/backend/catalog/pg_attribute_encoding.c:78–96

* Get the set of functions implementing a compression algorithm. * * Intercept requests for "none", since that is not a real compression * implementation but a fake one to indicate no compression desired. */

 * implementation but a fake one to indicate no compression desired.
 */
PGFunction *
get_funcs_for_compression(char *compresstype)
{
	PGFunction *func = NULL;

	if (compresstype == NULL ||
		compresstype[0] == '\0' ||
		pg_strcasecmp("none", compresstype) == 0)
	{
		return func;
	}
	else
	{
		func = GetCompressionImplementation(compresstype);

		Assert(PointerIsValid(func));
	}
	return func;
}

/*
 * Get datum representations of the attoptions field in pg_attribute_encoding