Function hasNilValue

runtime/metricsview/query_expression_sql.go:233–235

(expr *Expression)

}

func hasNilValue(expr *Expression) bool {
	return expr != nil && expr.Value == nil && expr.Condition == nil && expr.Subquery == nil
}

// safeSQLIdentifierRegexp matches SQL identifiers that don't need to be escaped (alphanumeric and underscores, not starting with a digit).
var safeSQLIdentifierRegexp = regexp.MustCompile(`^[a-zA-Z_][a-zA-Z0-9_]*$`)