Function GetCommandTagEnum

src/backend/tcop/cmdtag.c:73–98

* Search CommandTag by name * * Returns CommandTag, or CMDTAG_UNKNOWN if not recognized */

 * Returns CommandTag, or CMDTAG_UNKNOWN if not recognized
 */
CommandTag
GetCommandTagEnum(const char *commandname)
{
	const CommandTagBehavior *base,
			   *last,
			   *position;
	int			result;

	if (commandname == NULL || *commandname == '\0')
		return CMDTAG_UNKNOWN;

	base = tag_behavior;
	last = tag_behavior + lengthof(tag_behavior) - 1;
	while (last >= base)
	{
		position = base + ((last - base) >> 1);
		result = pg_strcasecmp(commandname, position->name);
		if (result == 0)
			return (CommandTag) (position - tag_behavior);
		else if (result < 0)
			last = position - 1;
		else
			base = position + 1;
	}
	return CMDTAG_UNKNOWN;
}