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Revert "Revert promql changes"

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This reverts commit 78eb1623ec.
This commit is contained in:
Owen Williams 2023-12-08 12:48:07 -05:00
parent d6da51f70c
commit f66850c0fe
3 changed files with 484 additions and 575 deletions
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20
promql/parser/generated_parser.y
View file

@ -161,7 +161,7 @@ START_METRIC_SELECTOR
// Type definitions for grammar rules.
%type <matchers> label_match_list
%type <matcher> label_matcher
%type <item> aggregate_op grouping_label match_op maybe_label metric_identifier unary_op at_modifier_preprocessors
%type <item> aggregate_op grouping_label match_op maybe_label metric_identifier unary_op at_modifier_preprocessors string_identifier
%type <labels> label_set metric
%type <lblList> label_set_list
%type <label> label_set_item
@ -582,7 +582,11 @@ label_match_list: label_match_list COMMA label_matcher
;
label_matcher : IDENTIFIER match_op STRING
{ $$ = yylex.(*parser).newLabelMatcher($1, $2, $3); }
{ $$ = yylex.(*parser).newLabelMatcher($1, $2, $3); }
| string_identifier match_op STRING
{ $$ = yylex.(*parser).newLabelMatcher($1, $2, $3); }
| string_identifier
{ $$ = yylex.(*parser).newMetricNameMatcher($1); }
| IDENTIFIER match_op error
{ yylex.(*parser).unexpected("label matching", "string"); $$ = nil}
| IDENTIFIER error
@ -901,7 +905,17 @@ string_literal : STRING
PosRange: $1.PositionRange(),
}
}
;
;
string_identifier : STRING
{
$$ = Item{
Typ: METRIC_IDENTIFIER,
Pos: $1.PositionRange().Start,
Val: yylex.(*parser).unquoteString($1.Val),
}
}
;
/*
* Wrappers for optional arguments.

1018
promql/parser/generated_parser.y.go
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File diff suppressed because it is too large Load diff

21
promql/parser/parse.go
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@ -791,6 +791,18 @@ func (p *parser) checkAST(node Node) (typ ValueType) {
// Skip the check for non-empty matchers because an explicit
// metric name is a non-empty matcher.
break
} else {
// We also have to make sure a metric name was not set twice inside the
// braces.
foundMetricName := ""
for _, m := range n.LabelMatchers {
if m != nil && m.Name == labels.MetricName {
if foundMetricName != "" {
p.addParseErrf(n.PositionRange(), "metric name must not be set twice: %q or %q", foundMetricName, m.Value)
}
foundMetricName = m.Value
}
}
}
// A Vector selector must contain at least one non-empty matcher to prevent
@ -874,6 +886,15 @@ func (p *parser) newLabelMatcher(label, operator, value Item) *labels.Matcher {
return m
}
func (p *parser) newMetricNameMatcher(value Item) *labels.Matcher {
m, err := labels.NewMatcher(labels.MatchEqual, labels.MetricName, value.Val)
if err != nil {
p.addParseErr(value.PositionRange(), err)
}
return m
}
// addOffset is used to set the offset in the generated parser.
func (p *parser) addOffset(e Node, offset time.Duration) {
var orgoffsetp *time.Duration