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Address offline feedback

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Signed-off-by: Marco Pracucci <marco@pracucci.com>
This commit is contained in:
Marco Pracucci 2023-09-29 15:14:37 +02:00
parent 5ae9c194ce
commit 3ed2ca3c4c
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GPG key ID: 74C1BD403D2DF9B5
1 changed files with 5 additions and 5 deletions
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10
model/labels/regexp.go
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@ -528,20 +528,20 @@ func stringMatcherFromRegexpInternal(re *syntax.Regexp) StringMatcher {
matches, matchesCaseSensitive := findSetMatchesInternal(re, "")
if len(matches) == 0 {
if len(matches) == 0 && len(re.Sub) == 2 {
// We have not find fixed set matches. We look for other known cases that
// we can optimize.
switch {
// Literal as prefix.
case right == nil && len(re.Sub) == 2 && re.Sub[0].Op == syntax.OpLiteral:
// Prefix is literal.
case right == nil && re.Sub[0].Op == syntax.OpLiteral:
right = stringMatcherFromRegexpInternal(re.Sub[1])
if right != nil {
matches = []string{string(re.Sub[0].Rune)}
matchesCaseSensitive = !isCaseInsensitive(re.Sub[0])
}
// Literal as suffix.
case left == nil && len(re.Sub) == 2 && re.Sub[1].Op == syntax.OpLiteral:
// Suffix is literal.
case left == nil && re.Sub[1].Op == syntax.OpLiteral:
left = stringMatcherFromRegexpInternal(re.Sub[0])
if left != nil {
matches = []string{string(re.Sub[1].Rune)}