Function classifyOmniParseError

backend/plugin/parser/tidb/metrics.go:63–74

classifyOmniParseError maps an omni parse error + the input SQL into a counter label. The input SQL is required because the omni error string does not always echo the offending keyword (notably for CREATE SEQUENCE). Returns "unknown" for nil error or any error+sql whose haystack contains no known Ti

(err error, sql string)

// Returns "unknown" for nil error or any error+sql whose haystack contains
// no known Tier-4 keyword.
func classifyOmniParseError(err error, sql string) string {
	if err == nil {
		return "unknown"
	}
	haystack := strings.ToUpper(err.Error() + " " + sql)
	for _, p := range omniFallbackReasonPatterns {
		if strings.Contains(haystack, p.pattern) {
			return p.reason
		}
	}
	return "unknown"
}