Method update

pkg/sql/sem/tree/regexp_cache.go:115–122

update invalidates the regular expression for the given pattern. If a new regular expression is passed in, it is inserted into the cache.

(key RegexpCacheKey, re *regexp.Regexp)

// update invalidates the regular expression for the given pattern.
// If a new regular expression is passed in, it is inserted into the cache.
func (rc *RegexpCache) update(key RegexpCacheKey, re *regexp.Regexp) {
	rc.mu.Lock()
	defer rc.mu.Unlock()
	rc.cache.Del(key)
	if re != nil {
		rc.cache.Add(key, re)
	}
}

// Len returns the number of compiled regular expressions in the cache.
func (rc *RegexpCache) Len() int {