mirror of
https://github.com/prometheus/prometheus.git
synced 2025-09-21 05:41:01 +02:00
2aaeefe8e1
* fix(parser): wrong end position aggregate expression Fixes: https://github.com/prometheus/prometheus/issues/16053 The position range of nested aggregate expression was wrong, for the expression "(sum(foo))" the position of "sum(foo)" should be 1-9, but the parser could not decide the end of the expression on pos 9, instead it read ahead to pos 10 and then emitted the aggregate. But we only kept the last closing position (10) and wrote that into the aggregate. The reason for this is that the parser cannot know from "(sum(foo)" alone if the aggregate is finished. It could be finished as in "(sum(foo))" but equally it could continue with group modifier as "(sum(foo) by (bar))". Previous fix in #16041 tried to keep track of parenthesis, but that is complicated because the error happens after closing two parenthesis. That fix introduced new bugs. This fix now addresses the issue directly. Since we have to step outside the parser state machine anyway, we can just add an algorithm to detect and fix the issue. That's Lexer.findPrevRightParen(). Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>
1245 lines
48 KiB
Plaintext
1245 lines
48 KiB
Plaintext
// Copyright 2019 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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%{
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package parser
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import (
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"math"
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"strconv"
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"time"
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"github.com/prometheus/prometheus/model/labels"
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"github.com/prometheus/prometheus/model/value"
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"github.com/prometheus/prometheus/model/histogram"
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"github.com/prometheus/prometheus/promql/parser/posrange"
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"github.com/prometheus/common/model"
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)
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%}
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%union {
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node Node
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item Item
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matchers []*labels.Matcher
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matcher *labels.Matcher
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label labels.Label
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labels labels.Labels
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lblList []labels.Label
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strings []string
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series []SequenceValue
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histogram *histogram.FloatHistogram
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descriptors map[string]interface{}
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bucket_set []float64
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int int64
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uint uint64
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float float64
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}
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%token <item>
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EQL
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BLANK
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COLON
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COMMA
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COMMENT
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DURATION
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EOF
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ERROR
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IDENTIFIER
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LEFT_BRACE
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LEFT_BRACKET
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LEFT_PAREN
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OPEN_HIST
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CLOSE_HIST
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METRIC_IDENTIFIER
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NUMBER
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RIGHT_BRACE
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RIGHT_BRACKET
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RIGHT_PAREN
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SEMICOLON
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SPACE
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STRING
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TIMES
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// Histogram Descriptors.
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%token histogramDescStart
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%token <item>
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SUM_DESC
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COUNT_DESC
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SCHEMA_DESC
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OFFSET_DESC
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NEGATIVE_OFFSET_DESC
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BUCKETS_DESC
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NEGATIVE_BUCKETS_DESC
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ZERO_BUCKET_DESC
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ZERO_BUCKET_WIDTH_DESC
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CUSTOM_VALUES_DESC
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COUNTER_RESET_HINT_DESC
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%token histogramDescEnd
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// Operators.
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%token operatorsStart
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%token <item>
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ADD
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DIV
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EQLC
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EQL_REGEX
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GTE
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GTR
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LAND
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LOR
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LSS
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LTE
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LUNLESS
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MOD
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MUL
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NEQ
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NEQ_REGEX
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POW
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SUB
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AT
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ATAN2
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%token operatorsEnd
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// Aggregators.
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%token aggregatorsStart
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%token <item>
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AVG
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BOTTOMK
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COUNT
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COUNT_VALUES
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GROUP
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MAX
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MIN
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QUANTILE
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STDDEV
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STDVAR
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SUM
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TOPK
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LIMITK
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LIMIT_RATIO
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%token aggregatorsEnd
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// Keywords.
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%token keywordsStart
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%token <item>
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BOOL
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BY
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GROUP_LEFT
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GROUP_RIGHT
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IGNORING
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OFFSET
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ON
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WITHOUT
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%token keywordsEnd
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// Preprocessors.
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%token preprocessorStart
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%token <item>
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START
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END
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STEP
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%token preprocessorEnd
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// Counter reset hints.
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%token counterResetHintsStart
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%token <item>
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UNKNOWN_COUNTER_RESET
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COUNTER_RESET
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NOT_COUNTER_RESET
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GAUGE_TYPE
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%token counterResetHintsEnd
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// Start symbols for the generated parser.
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%token startSymbolsStart
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%token
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START_METRIC
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START_SERIES_DESCRIPTION
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START_EXPRESSION
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START_METRIC_SELECTOR
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%token startSymbolsEnd
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// Type definitions for grammar rules.
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%type <matchers> label_match_list
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%type <matcher> label_matcher
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%type <item> aggregate_op grouping_label match_op maybe_label metric_identifier unary_op at_modifier_preprocessors string_identifier counter_reset_hint min_max
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%type <labels> label_set metric
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%type <lblList> label_set_list
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%type <label> label_set_item
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%type <strings> grouping_label_list grouping_labels maybe_grouping_labels
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%type <series> series_item series_values
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%type <histogram> histogram_series_value
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%type <descriptors> histogram_desc_map histogram_desc_item
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%type <bucket_set> bucket_set bucket_set_list
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%type <int> int
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%type <uint> uint
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%type <float> number series_value signed_number signed_or_unsigned_number
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%type <node> step_invariant_expr aggregate_expr aggregate_modifier bin_modifier binary_expr bool_modifier expr function_call function_call_args function_call_body group_modifiers label_matchers matrix_selector number_duration_literal offset_expr on_or_ignoring paren_expr string_literal subquery_expr unary_expr vector_selector duration_expr paren_duration_expr positive_duration_expr offset_duration_expr
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%start start
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// Operators are listed with increasing precedence.
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%left LOR
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%left LAND LUNLESS
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%left EQLC GTE GTR LSS LTE NEQ
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%left ADD SUB
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%left MUL DIV MOD ATAN2
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%right POW
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// Offset modifiers do not have associativity.
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%nonassoc OFFSET
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// This ensures that it is always attempted to parse range or subquery selectors when a left
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// bracket is encountered.
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%right LEFT_BRACKET
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%%
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start :
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START_METRIC metric
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{ yylex.(*parser).generatedParserResult = $2 }
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| START_SERIES_DESCRIPTION series_description
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| START_EXPRESSION /* empty */ EOF
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{ yylex.(*parser).addParseErrf(posrange.PositionRange{}, "no expression found in input")}
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| START_EXPRESSION expr
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{ yylex.(*parser).generatedParserResult = $2 }
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| START_METRIC_SELECTOR vector_selector
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{ yylex.(*parser).generatedParserResult = $2 }
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| start EOF
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| error /* If none of the more detailed error messages are triggered, we fall back to this. */
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{ yylex.(*parser).unexpected("","") }
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;
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expr :
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aggregate_expr
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| binary_expr
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| function_call
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| matrix_selector
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| number_duration_literal
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| offset_expr
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| paren_expr
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| string_literal
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| subquery_expr
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| unary_expr
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| vector_selector
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| step_invariant_expr
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| duration_expr
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;
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/*
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* Aggregations.
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*/
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aggregate_expr : aggregate_op aggregate_modifier function_call_body
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{ $$ = yylex.(*parser).newAggregateExpr($1, $2, $3, false) }
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| aggregate_op function_call_body aggregate_modifier
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{ $$ = yylex.(*parser).newAggregateExpr($1, $3, $2, false) }
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| aggregate_op function_call_body
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{ $$ = yylex.(*parser).newAggregateExpr($1, &AggregateExpr{}, $2, true) }
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| aggregate_op error
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{
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yylex.(*parser).unexpected("aggregation","");
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$$ = yylex.(*parser).newAggregateExpr($1, &AggregateExpr{}, Expressions{}, false)
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}
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;
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aggregate_modifier:
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BY grouping_labels
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{
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$$ = &AggregateExpr{
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Grouping: $2,
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}
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}
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| WITHOUT grouping_labels
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{
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$$ = &AggregateExpr{
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Grouping: $2,
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Without: true,
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}
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}
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;
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/*
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* Binary expressions.
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*/
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// Operator precedence only works if each of those is listed separately.
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binary_expr : expr ADD bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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| expr ATAN2 bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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| expr DIV bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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| expr EQLC bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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| expr GTE bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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| expr GTR bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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| expr LAND bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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| expr LOR bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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| expr LSS bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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| expr LTE bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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| expr LUNLESS bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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| expr MOD bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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| expr MUL bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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| expr NEQ bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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| expr POW bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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| expr SUB bin_modifier expr { $$ = yylex.(*parser).newBinaryExpression($1, $2, $3, $4) }
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;
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// Using left recursion for the modifier rules, helps to keep the parser stack small and
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// reduces allocations.
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bin_modifier : group_modifiers;
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bool_modifier : /* empty */
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{ $$ = &BinaryExpr{
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VectorMatching: &VectorMatching{Card: CardOneToOne},
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}
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}
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| BOOL
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{ $$ = &BinaryExpr{
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VectorMatching: &VectorMatching{Card: CardOneToOne},
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ReturnBool: true,
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}
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}
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;
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on_or_ignoring : bool_modifier IGNORING grouping_labels
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{
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$$ = $1
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$$.(*BinaryExpr).VectorMatching.MatchingLabels = $3
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}
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| bool_modifier ON grouping_labels
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{
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$$ = $1
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$$.(*BinaryExpr).VectorMatching.MatchingLabels = $3
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$$.(*BinaryExpr).VectorMatching.On = true
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}
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;
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group_modifiers: bool_modifier /* empty */
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| on_or_ignoring /* empty */
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| on_or_ignoring GROUP_LEFT maybe_grouping_labels
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{
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$$ = $1
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$$.(*BinaryExpr).VectorMatching.Card = CardManyToOne
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$$.(*BinaryExpr).VectorMatching.Include = $3
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}
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| on_or_ignoring GROUP_RIGHT maybe_grouping_labels
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{
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$$ = $1
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$$.(*BinaryExpr).VectorMatching.Card = CardOneToMany
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$$.(*BinaryExpr).VectorMatching.Include = $3
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}
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;
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grouping_labels : LEFT_PAREN grouping_label_list RIGHT_PAREN
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{ $$ = $2 }
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| LEFT_PAREN grouping_label_list COMMA RIGHT_PAREN
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{ $$ = $2 }
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| LEFT_PAREN RIGHT_PAREN
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{ $$ = []string{} }
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| error
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{ yylex.(*parser).unexpected("grouping opts", "\"(\""); $$ = nil }
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;
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grouping_label_list:
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grouping_label_list COMMA grouping_label
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{ $$ = append($1, $3.Val) }
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| grouping_label
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{ $$ = []string{$1.Val} }
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| grouping_label_list error
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{ yylex.(*parser).unexpected("grouping opts", "\",\" or \")\""); $$ = $1 }
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;
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grouping_label : maybe_label
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{
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if !model.LabelName($1.Val).IsValid() {
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yylex.(*parser).addParseErrf($1.PositionRange(),"invalid label name for grouping: %q", $1.Val)
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}
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$$ = $1
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}
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| STRING {
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unquoted := yylex.(*parser).unquoteString($1.Val)
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if !model.LabelName(unquoted).IsValid() {
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yylex.(*parser).addParseErrf($1.PositionRange(),"invalid label name for grouping: %q", unquoted)
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}
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$$ = $1
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$$.Pos++
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$$.Val = unquoted
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}
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| error
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{ yylex.(*parser).unexpected("grouping opts", "label"); $$ = Item{} }
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;
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/*
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* Function calls.
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*/
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function_call : IDENTIFIER function_call_body
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{
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fn, exist := getFunction($1.Val, yylex.(*parser).functions)
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if !exist{
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yylex.(*parser).addParseErrf($1.PositionRange(),"unknown function with name %q", $1.Val)
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}
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if fn != nil && fn.Experimental && !EnableExperimentalFunctions {
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yylex.(*parser).addParseErrf($1.PositionRange(),"function %q is not enabled", $1.Val)
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}
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$$ = &Call{
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Func: fn,
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Args: $2.(Expressions),
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PosRange: posrange.PositionRange{
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Start: $1.Pos,
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End: yylex.(*parser).lastClosing,
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},
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}
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}
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;
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function_call_body: LEFT_PAREN function_call_args RIGHT_PAREN
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{ $$ = $2 }
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| LEFT_PAREN RIGHT_PAREN
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{$$ = Expressions{}}
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;
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function_call_args: function_call_args COMMA expr
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{ $$ = append($1.(Expressions), $3.(Expr)) }
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| expr
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{ $$ = Expressions{$1.(Expr)} }
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| function_call_args COMMA
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{
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yylex.(*parser).addParseErrf($2.PositionRange(), "trailing commas not allowed in function call args")
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$$ = $1
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}
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;
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/*
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* Expressions inside parentheses.
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*/
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paren_expr : LEFT_PAREN expr RIGHT_PAREN
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{ $$ = &ParenExpr{Expr: $2.(Expr), PosRange: mergeRanges(&$1, &$3)} }
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;
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/*
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* Offset modifiers.
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*/
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positive_duration_expr : duration_expr
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{
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if numLit, ok := $1.(*NumberLiteral); ok {
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if numLit.Val <= 0 {
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yylex.(*parser).addParseErrf(numLit.PositionRange(), "duration must be greater than 0")
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$$ = &NumberLiteral{Val: 0} // Return 0 on error.
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break
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}
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$$ = $1
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break
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}
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$$ = $1
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}
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;
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offset_expr: expr OFFSET offset_duration_expr
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{
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if numLit, ok := $3.(*NumberLiteral); ok {
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yylex.(*parser).addOffset($1, time.Duration(math.Round(numLit.Val*float64(time.Second))))
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$$ = $1
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break
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}
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yylex.(*parser).addOffsetExpr($1, $3.(*DurationExpr))
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$$ = $1
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}
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| expr OFFSET error
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{ yylex.(*parser).unexpected("offset", "number, duration, or step()"); $$ = $1 }
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;
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/*
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* @ modifiers.
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*/
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step_invariant_expr: expr AT signed_or_unsigned_number
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{
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yylex.(*parser).setTimestamp($1, $3)
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$$ = $1
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}
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| expr AT at_modifier_preprocessors LEFT_PAREN RIGHT_PAREN
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{
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yylex.(*parser).setAtModifierPreprocessor($1, $3)
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$$ = $1
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}
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| expr AT error
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{ yylex.(*parser).unexpected("@", "timestamp"); $$ = $1 }
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;
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at_modifier_preprocessors: START | END;
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/*
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* Subquery and range selectors.
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*/
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matrix_selector : expr LEFT_BRACKET positive_duration_expr RIGHT_BRACKET
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{
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var errMsg string
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vs, ok := $1.(*VectorSelector)
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if !ok{
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errMsg = "ranges only allowed for vector selectors"
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} else if vs.OriginalOffset != 0{
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errMsg = "no offset modifiers allowed before range"
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} else if vs.Timestamp != nil {
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errMsg = "no @ modifiers allowed before range"
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}
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if errMsg != ""{
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errRange := mergeRanges(&$2, &$4)
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yylex.(*parser).addParseErrf(errRange, "%s", errMsg)
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}
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var rangeNl time.Duration
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if numLit, ok := $3.(*NumberLiteral); ok {
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rangeNl = time.Duration(math.Round(numLit.Val*float64(time.Second)))
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}
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rangeExpr, _ := $3.(*DurationExpr)
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$$ = &MatrixSelector{
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VectorSelector: $1.(Expr),
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Range: rangeNl,
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RangeExpr: rangeExpr,
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EndPos: yylex.(*parser).lastClosing,
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}
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}
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;
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|
|
subquery_expr : expr LEFT_BRACKET positive_duration_expr COLON positive_duration_expr RIGHT_BRACKET
|
|
{
|
|
var rangeNl time.Duration
|
|
var stepNl time.Duration
|
|
if numLit, ok := $3.(*NumberLiteral); ok {
|
|
rangeNl = time.Duration(math.Round(numLit.Val*float64(time.Second)))
|
|
}
|
|
rangeExpr, _ := $3.(*DurationExpr)
|
|
if numLit, ok := $5.(*NumberLiteral); ok {
|
|
stepNl = time.Duration(math.Round(numLit.Val*float64(time.Second)))
|
|
}
|
|
stepExpr, _ := $5.(*DurationExpr)
|
|
$$ = &SubqueryExpr{
|
|
Expr: $1.(Expr),
|
|
Range: rangeNl,
|
|
RangeExpr: rangeExpr,
|
|
Step: stepNl,
|
|
StepExpr: stepExpr,
|
|
EndPos: $6.Pos + 1,
|
|
}
|
|
}
|
|
| expr LEFT_BRACKET positive_duration_expr COLON RIGHT_BRACKET
|
|
{
|
|
var rangeNl time.Duration
|
|
if numLit, ok := $3.(*NumberLiteral); ok {
|
|
rangeNl = time.Duration(math.Round(numLit.Val*float64(time.Second)))
|
|
}
|
|
rangeExpr, _ := $3.(*DurationExpr)
|
|
$$ = &SubqueryExpr{
|
|
Expr: $1.(Expr),
|
|
Range: rangeNl,
|
|
RangeExpr: rangeExpr,
|
|
EndPos: $5.Pos + 1,
|
|
}
|
|
}
|
|
| expr LEFT_BRACKET positive_duration_expr COLON positive_duration_expr error
|
|
{ yylex.(*parser).unexpected("subquery selector", "\"]\""); $$ = $1 }
|
|
| expr LEFT_BRACKET positive_duration_expr COLON error
|
|
{ yylex.(*parser).unexpected("subquery selector", "number, duration, or step() or \"]\""); $$ = $1 }
|
|
| expr LEFT_BRACKET positive_duration_expr error
|
|
{ yylex.(*parser).unexpected("subquery or range", "\":\" or \"]\""); $$ = $1 }
|
|
| expr LEFT_BRACKET error
|
|
{ yylex.(*parser).unexpected("subquery or range selector", "number, duration, or step()"); $$ = $1 }
|
|
;
|
|
|
|
/*
|
|
* Unary expressions.
|
|
*/
|
|
|
|
unary_expr :
|
|
/* Gives the rule the same precedence as MUL. This aligns with mathematical conventions. */
|
|
unary_op expr %prec MUL
|
|
{
|
|
if nl, ok := $2.(*NumberLiteral); ok {
|
|
if $1.Typ == SUB {
|
|
nl.Val *= -1
|
|
}
|
|
nl.PosRange.Start = $1.Pos
|
|
$$ = nl
|
|
} else {
|
|
$$ = &UnaryExpr{Op: $1.Typ, Expr: $2.(Expr), StartPos: $1.Pos}
|
|
}
|
|
}
|
|
;
|
|
|
|
/*
|
|
* Vector selectors.
|
|
*/
|
|
|
|
vector_selector: metric_identifier label_matchers
|
|
{
|
|
vs := $2.(*VectorSelector)
|
|
vs.PosRange = mergeRanges(&$1, vs)
|
|
vs.Name = $1.Val
|
|
yylex.(*parser).assembleVectorSelector(vs)
|
|
$$ = vs
|
|
}
|
|
| metric_identifier
|
|
{
|
|
vs := &VectorSelector{
|
|
Name: $1.Val,
|
|
LabelMatchers: []*labels.Matcher{},
|
|
PosRange: $1.PositionRange(),
|
|
}
|
|
yylex.(*parser).assembleVectorSelector(vs)
|
|
$$ = vs
|
|
}
|
|
| label_matchers
|
|
{
|
|
vs := $1.(*VectorSelector)
|
|
yylex.(*parser).assembleVectorSelector(vs)
|
|
$$ = vs
|
|
}
|
|
;
|
|
|
|
label_matchers : LEFT_BRACE label_match_list RIGHT_BRACE
|
|
{
|
|
$$ = &VectorSelector{
|
|
LabelMatchers: $2,
|
|
PosRange: mergeRanges(&$1, &$3),
|
|
}
|
|
}
|
|
| LEFT_BRACE label_match_list COMMA RIGHT_BRACE
|
|
{
|
|
$$ = &VectorSelector{
|
|
LabelMatchers: $2,
|
|
PosRange: mergeRanges(&$1, &$4),
|
|
}
|
|
}
|
|
| LEFT_BRACE RIGHT_BRACE
|
|
{
|
|
$$ = &VectorSelector{
|
|
LabelMatchers: []*labels.Matcher{},
|
|
PosRange: mergeRanges(&$1, &$2),
|
|
}
|
|
}
|
|
;
|
|
|
|
label_match_list: label_match_list COMMA label_matcher
|
|
{
|
|
if $1 != nil{
|
|
$$ = append($1, $3)
|
|
} else {
|
|
$$ = $1
|
|
}
|
|
}
|
|
| label_matcher
|
|
{ $$ = []*labels.Matcher{$1}}
|
|
| label_match_list error
|
|
{ yylex.(*parser).unexpected("label matching", "\",\" or \"}\""); $$ = $1 }
|
|
;
|
|
|
|
label_matcher : IDENTIFIER match_op STRING
|
|
{ $$ = yylex.(*parser).newLabelMatcher($1, $2, $3); }
|
|
| string_identifier match_op STRING
|
|
{ $$ = yylex.(*parser).newLabelMatcher($1, $2, $3); }
|
|
| string_identifier
|
|
{ $$ = yylex.(*parser).newMetricNameMatcher($1); }
|
|
| string_identifier match_op error
|
|
{ yylex.(*parser).unexpected("label matching", "string"); $$ = nil}
|
|
| IDENTIFIER match_op error
|
|
{ yylex.(*parser).unexpected("label matching", "string"); $$ = nil}
|
|
| IDENTIFIER error
|
|
{ yylex.(*parser).unexpected("label matching", "label matching operator"); $$ = nil }
|
|
| error
|
|
{ yylex.(*parser).unexpected("label matching", "identifier or \"}\""); $$ = nil}
|
|
;
|
|
|
|
/*
|
|
* Metric descriptions.
|
|
*/
|
|
|
|
metric : metric_identifier label_set
|
|
{ b := labels.NewBuilder($2); b.Set(labels.MetricName, $1.Val); $$ = b.Labels() }
|
|
| label_set
|
|
{$$ = $1}
|
|
;
|
|
|
|
|
|
metric_identifier: AVG | BOTTOMK | BY | COUNT | COUNT_VALUES | GROUP | IDENTIFIER | LAND | LOR | LUNLESS | MAX | METRIC_IDENTIFIER | MIN | OFFSET | QUANTILE | STDDEV | STDVAR | SUM | TOPK | WITHOUT | START | END | LIMITK | LIMIT_RATIO | STEP;
|
|
|
|
label_set : LEFT_BRACE label_set_list RIGHT_BRACE
|
|
{ $$ = labels.New($2...) }
|
|
| LEFT_BRACE label_set_list COMMA RIGHT_BRACE
|
|
{ $$ = labels.New($2...) }
|
|
| LEFT_BRACE RIGHT_BRACE
|
|
{ $$ = labels.New() }
|
|
| /* empty */
|
|
{ $$ = labels.New() }
|
|
;
|
|
|
|
label_set_list : label_set_list COMMA label_set_item
|
|
{ $$ = append($1, $3) }
|
|
| label_set_item
|
|
{ $$ = []labels.Label{$1} }
|
|
| label_set_list error
|
|
{ yylex.(*parser).unexpected("label set", "\",\" or \"}\"", ); $$ = $1 }
|
|
|
|
;
|
|
|
|
label_set_item : IDENTIFIER EQL STRING
|
|
{ $$ = labels.Label{Name: $1.Val, Value: yylex.(*parser).unquoteString($3.Val) } }
|
|
| string_identifier EQL STRING
|
|
{ $$ = labels.Label{Name: $1.Val, Value: yylex.(*parser).unquoteString($3.Val) } }
|
|
| string_identifier
|
|
{ $$ = labels.Label{Name: labels.MetricName, Value: $1.Val} }
|
|
| IDENTIFIER EQL error
|
|
{ yylex.(*parser).unexpected("label set", "string"); $$ = labels.Label{}}
|
|
| string_identifier EQL error
|
|
{ yylex.(*parser).unexpected("label set", "string"); $$ = labels.Label{}}
|
|
| IDENTIFIER error
|
|
{ yylex.(*parser).unexpected("label set", "\"=\""); $$ = labels.Label{}}
|
|
| error
|
|
{ yylex.(*parser).unexpected("label set", "identifier or \"}\""); $$ = labels.Label{} }
|
|
;
|
|
|
|
/*
|
|
* Series descriptions:
|
|
* A separate language that is used to generate series values promtool.
|
|
* It is included in the promQL parser, because it shares common functionality, such as parsing a metric.
|
|
* The syntax is described in https://prometheus.io/docs/prometheus/latest/configuration/unit_testing_rules/#series
|
|
*/
|
|
|
|
series_description: metric series_values
|
|
{
|
|
yylex.(*parser).generatedParserResult = &seriesDescription{
|
|
labels: $1,
|
|
values: $2,
|
|
}
|
|
}
|
|
;
|
|
|
|
series_values : /*empty*/
|
|
{ $$ = []SequenceValue{} }
|
|
| series_values SPACE series_item
|
|
{ $$ = append($1, $3...) }
|
|
| series_values SPACE
|
|
{ $$ = $1 }
|
|
| error
|
|
{ yylex.(*parser).unexpected("series values", ""); $$ = nil }
|
|
;
|
|
|
|
series_item : BLANK
|
|
{ $$ = []SequenceValue{{Omitted: true}}}
|
|
| BLANK TIMES uint
|
|
{
|
|
$$ = []SequenceValue{}
|
|
for i:=uint64(0); i < $3; i++{
|
|
$$ = append($$, SequenceValue{Omitted: true})
|
|
}
|
|
}
|
|
| series_value
|
|
{ $$ = []SequenceValue{{Value: $1}}}
|
|
| series_value TIMES uint
|
|
{
|
|
$$ = []SequenceValue{}
|
|
// Add an additional value for time 0, which we ignore in tests.
|
|
for i:=uint64(0); i <= $3; i++{
|
|
$$ = append($$, SequenceValue{Value: $1})
|
|
}
|
|
}
|
|
| series_value signed_number TIMES uint
|
|
{
|
|
$$ = []SequenceValue{}
|
|
// Add an additional value for time 0, which we ignore in tests.
|
|
for i:=uint64(0); i <= $4; i++{
|
|
$$ = append($$, SequenceValue{Value: $1})
|
|
$1 += $2
|
|
}
|
|
}
|
|
// Histogram descriptions (part of unit testing).
|
|
| histogram_series_value
|
|
{
|
|
$$ = []SequenceValue{{Histogram:$1}}
|
|
}
|
|
| histogram_series_value TIMES uint
|
|
{
|
|
$$ = []SequenceValue{}
|
|
// Add an additional value for time 0, which we ignore in tests.
|
|
for i:=uint64(0); i <= $3; i++{
|
|
$$ = append($$, SequenceValue{Histogram:$1})
|
|
//$1 += $2
|
|
}
|
|
}
|
|
| histogram_series_value ADD histogram_series_value TIMES uint
|
|
{
|
|
val, err := yylex.(*parser).histogramsIncreaseSeries($1,$3,$5)
|
|
if err != nil {
|
|
yylex.(*parser).addSemanticError(err)
|
|
}
|
|
$$ = val
|
|
}
|
|
| histogram_series_value SUB histogram_series_value TIMES uint
|
|
{
|
|
val, err := yylex.(*parser).histogramsDecreaseSeries($1,$3,$5)
|
|
if err != nil {
|
|
yylex.(*parser).addSemanticError(err)
|
|
}
|
|
$$ = val
|
|
}
|
|
;
|
|
|
|
series_value : IDENTIFIER
|
|
{
|
|
if $1.Val != "stale" {
|
|
yylex.(*parser).unexpected("series values", "number or \"stale\"")
|
|
}
|
|
$$ = math.Float64frombits(value.StaleNaN)
|
|
}
|
|
| number
|
|
| signed_number
|
|
;
|
|
|
|
histogram_series_value
|
|
: OPEN_HIST histogram_desc_map SPACE CLOSE_HIST
|
|
{
|
|
$$ = yylex.(*parser).buildHistogramFromMap(&$2)
|
|
}
|
|
| OPEN_HIST histogram_desc_map CLOSE_HIST
|
|
{
|
|
$$ = yylex.(*parser).buildHistogramFromMap(&$2)
|
|
}
|
|
| OPEN_HIST SPACE CLOSE_HIST
|
|
{
|
|
m := yylex.(*parser).newMap()
|
|
$$ = yylex.(*parser).buildHistogramFromMap(&m)
|
|
}
|
|
| OPEN_HIST CLOSE_HIST
|
|
{
|
|
m := yylex.(*parser).newMap()
|
|
$$ = yylex.(*parser).buildHistogramFromMap(&m)
|
|
}
|
|
;
|
|
|
|
histogram_desc_map
|
|
: histogram_desc_map SPACE histogram_desc_item
|
|
{
|
|
$$ = *(yylex.(*parser).mergeMaps(&$1,&$3))
|
|
}
|
|
| histogram_desc_item
|
|
{
|
|
$$ = $1
|
|
}
|
|
| histogram_desc_map error {
|
|
yylex.(*parser).unexpected("histogram description", "histogram description key, e.g. buckets:[5 10 7]")
|
|
}
|
|
;
|
|
|
|
histogram_desc_item
|
|
: SCHEMA_DESC COLON int
|
|
{
|
|
$$ = yylex.(*parser).newMap()
|
|
$$["schema"] = $3
|
|
}
|
|
| SUM_DESC COLON signed_or_unsigned_number
|
|
{
|
|
$$ = yylex.(*parser).newMap()
|
|
$$["sum"] = $3
|
|
}
|
|
| COUNT_DESC COLON signed_or_unsigned_number
|
|
{
|
|
$$ = yylex.(*parser).newMap()
|
|
$$["count"] = $3
|
|
}
|
|
| ZERO_BUCKET_DESC COLON signed_or_unsigned_number
|
|
{
|
|
$$ = yylex.(*parser).newMap()
|
|
$$["z_bucket"] = $3
|
|
}
|
|
| ZERO_BUCKET_WIDTH_DESC COLON number
|
|
{
|
|
$$ = yylex.(*parser).newMap()
|
|
$$["z_bucket_w"] = $3
|
|
}
|
|
| CUSTOM_VALUES_DESC COLON bucket_set
|
|
{
|
|
$$ = yylex.(*parser).newMap()
|
|
$$["custom_values"] = $3
|
|
}
|
|
| BUCKETS_DESC COLON bucket_set
|
|
{
|
|
$$ = yylex.(*parser).newMap()
|
|
$$["buckets"] = $3
|
|
}
|
|
| OFFSET_DESC COLON int
|
|
{
|
|
$$ = yylex.(*parser).newMap()
|
|
$$["offset"] = $3
|
|
}
|
|
| NEGATIVE_BUCKETS_DESC COLON bucket_set
|
|
{
|
|
$$ = yylex.(*parser).newMap()
|
|
$$["n_buckets"] = $3
|
|
}
|
|
| NEGATIVE_OFFSET_DESC COLON int
|
|
{
|
|
$$ = yylex.(*parser).newMap()
|
|
$$["n_offset"] = $3
|
|
}
|
|
| COUNTER_RESET_HINT_DESC COLON counter_reset_hint
|
|
{
|
|
$$ = yylex.(*parser).newMap()
|
|
$$["counter_reset_hint"] = $3
|
|
}
|
|
;
|
|
|
|
bucket_set : LEFT_BRACKET bucket_set_list SPACE RIGHT_BRACKET
|
|
{
|
|
$$ = $2
|
|
}
|
|
| LEFT_BRACKET bucket_set_list RIGHT_BRACKET
|
|
{
|
|
$$ = $2
|
|
}
|
|
;
|
|
|
|
bucket_set_list : bucket_set_list SPACE signed_or_unsigned_number
|
|
{
|
|
$$ = append($1, $3)
|
|
}
|
|
| signed_or_unsigned_number
|
|
{
|
|
$$ = []float64{$1}
|
|
}
|
|
| bucket_set_list error
|
|
;
|
|
|
|
counter_reset_hint : UNKNOWN_COUNTER_RESET | COUNTER_RESET | NOT_COUNTER_RESET | GAUGE_TYPE;
|
|
|
|
/*
|
|
* Keyword lists.
|
|
*/
|
|
|
|
aggregate_op : AVG | BOTTOMK | COUNT | COUNT_VALUES | GROUP | MAX | MIN | QUANTILE | STDDEV | STDVAR | SUM | TOPK | LIMITK | LIMIT_RATIO;
|
|
|
|
// Inside of grouping options label names can be recognized as keywords by the lexer. This is a list of keywords that could also be a label name.
|
|
maybe_label : AVG | BOOL | BOTTOMK | BY | COUNT | COUNT_VALUES | GROUP | GROUP_LEFT | GROUP_RIGHT | IDENTIFIER | IGNORING | LAND | LOR | LUNLESS | MAX | METRIC_IDENTIFIER | MIN | OFFSET | ON | QUANTILE | STDDEV | STDVAR | SUM | TOPK | START | END | ATAN2 | LIMITK | LIMIT_RATIO | STEP;
|
|
|
|
unary_op : ADD | SUB;
|
|
|
|
match_op : EQL | NEQ | EQL_REGEX | NEQ_REGEX ;
|
|
|
|
/*
|
|
* Literals.
|
|
*/
|
|
|
|
number_duration_literal : NUMBER
|
|
{
|
|
$$ = &NumberLiteral{
|
|
Val: yylex.(*parser).number($1.Val),
|
|
PosRange: $1.PositionRange(),
|
|
}
|
|
}
|
|
| DURATION
|
|
{
|
|
var err error
|
|
var dur time.Duration
|
|
dur, err = parseDuration($1.Val)
|
|
if err != nil {
|
|
yylex.(*parser).addParseErr($1.PositionRange(), err)
|
|
}
|
|
$$ = &NumberLiteral{
|
|
Val: dur.Seconds(),
|
|
PosRange: $1.PositionRange(),
|
|
Duration: true,
|
|
}
|
|
}
|
|
;
|
|
|
|
number : NUMBER
|
|
{
|
|
$$ = yylex.(*parser).number($1.Val)
|
|
}
|
|
| DURATION
|
|
{
|
|
var err error
|
|
var dur time.Duration
|
|
dur, err = parseDuration($1.Val)
|
|
if err != nil {
|
|
yylex.(*parser).addParseErr($1.PositionRange(), err)
|
|
}
|
|
$$ = dur.Seconds()
|
|
}
|
|
;
|
|
|
|
signed_number : ADD number { $$ = $2 }
|
|
| SUB number { $$ = -$2 }
|
|
;
|
|
|
|
signed_or_unsigned_number: number | signed_number ;
|
|
|
|
uint : NUMBER
|
|
{
|
|
var err error
|
|
$$, err = strconv.ParseUint($1.Val, 10, 64)
|
|
if err != nil {
|
|
yylex.(*parser).addParseErrf($1.PositionRange(), "invalid repetition in series values: %s", err)
|
|
}
|
|
}
|
|
;
|
|
|
|
int : SUB uint { $$ = -int64($2) }
|
|
| uint { $$ = int64($1) }
|
|
;
|
|
|
|
string_literal : STRING
|
|
{
|
|
$$ = &StringLiteral{
|
|
Val: yylex.(*parser).unquoteString($1.Val),
|
|
PosRange: $1.PositionRange(),
|
|
}
|
|
}
|
|
;
|
|
|
|
string_identifier : STRING
|
|
{
|
|
$$ = Item{
|
|
Typ: METRIC_IDENTIFIER,
|
|
Pos: $1.PositionRange().Start,
|
|
Val: yylex.(*parser).unquoteString($1.Val),
|
|
}
|
|
}
|
|
;
|
|
|
|
/*
|
|
* Wrappers for optional arguments.
|
|
*/
|
|
|
|
maybe_grouping_labels: /* empty */ { $$ = nil }
|
|
| grouping_labels
|
|
;
|
|
|
|
/*
|
|
* Duration expressions.
|
|
*/
|
|
|
|
// offset_duration_expr is needed to handle expressions like "foo offset -2^2" correctly.
|
|
// Without this rule, such expressions would be parsed as "foo offset (-2^2)" due to operator precedence.
|
|
// With this rule, they are parsed as "(foo offset -2)^2", which is the expected behavior without parentheses.
|
|
offset_duration_expr : number_duration_literal
|
|
{
|
|
nl := $1.(*NumberLiteral)
|
|
if nl.Val > 1<<63/1e9 || nl.Val < -(1<<63)/1e9 {
|
|
yylex.(*parser).addParseErrf(nl.PosRange, "duration out of range")
|
|
$$ = &NumberLiteral{Val: 0}
|
|
break
|
|
}
|
|
$$ = nl
|
|
}
|
|
| unary_op number_duration_literal
|
|
{
|
|
nl := $2.(*NumberLiteral)
|
|
if $1.Typ == SUB {
|
|
nl.Val *= -1
|
|
}
|
|
if nl.Val > 1<<63/1e9 || nl.Val < -(1<<63)/1e9 {
|
|
yylex.(*parser).addParseErrf($1.PositionRange(), "duration out of range")
|
|
$$ = &NumberLiteral{Val: 0}
|
|
break
|
|
}
|
|
nl.PosRange.Start = $1.Pos
|
|
$$ = nl
|
|
}
|
|
| STEP LEFT_PAREN RIGHT_PAREN
|
|
{
|
|
$$ = &DurationExpr{
|
|
Op: STEP,
|
|
StartPos: $1.PositionRange().Start,
|
|
EndPos: $3.PositionRange().End,
|
|
}
|
|
}
|
|
| unary_op STEP LEFT_PAREN RIGHT_PAREN
|
|
{
|
|
$$ = &DurationExpr{
|
|
Op: $1.Typ,
|
|
RHS: &DurationExpr{
|
|
Op: STEP,
|
|
StartPos: $2.PositionRange().Start,
|
|
EndPos: $4.PositionRange().End,
|
|
},
|
|
StartPos: $1.Pos,
|
|
}
|
|
}
|
|
| min_max LEFT_PAREN duration_expr COMMA duration_expr RIGHT_PAREN
|
|
{
|
|
$$ = &DurationExpr{
|
|
Op: $1.Typ,
|
|
StartPos: $1.PositionRange().Start,
|
|
EndPos: $6.PositionRange().End,
|
|
LHS: $3.(Expr),
|
|
RHS: $5.(Expr),
|
|
}
|
|
}
|
|
| unary_op min_max LEFT_PAREN duration_expr COMMA duration_expr RIGHT_PAREN
|
|
{
|
|
$$ = &DurationExpr{
|
|
Op: $1.Typ,
|
|
StartPos: $1.Pos,
|
|
EndPos: $6.PositionRange().End,
|
|
RHS: &DurationExpr{
|
|
Op: $2.Typ,
|
|
StartPos: $2.PositionRange().Start,
|
|
EndPos: $6.PositionRange().End,
|
|
LHS: $4.(Expr),
|
|
RHS: $6.(Expr),
|
|
},
|
|
}
|
|
}
|
|
| unary_op LEFT_PAREN duration_expr RIGHT_PAREN %prec MUL
|
|
{
|
|
de := $3.(*DurationExpr)
|
|
de.Wrapped = true
|
|
if $1.Typ == SUB {
|
|
$$ = &DurationExpr{
|
|
Op: SUB,
|
|
RHS: de,
|
|
StartPos: $1.Pos,
|
|
}
|
|
break
|
|
}
|
|
$$ = $3
|
|
}
|
|
| duration_expr
|
|
;
|
|
|
|
min_max: MIN | MAX ;
|
|
|
|
duration_expr : number_duration_literal
|
|
{
|
|
nl := $1.(*NumberLiteral)
|
|
if nl.Val > 1<<63/1e9 || nl.Val < -(1<<63)/1e9 {
|
|
yylex.(*parser).addParseErrf(nl.PosRange, "duration out of range")
|
|
$$ = &NumberLiteral{Val: 0}
|
|
break
|
|
}
|
|
$$ = nl
|
|
}
|
|
| unary_op duration_expr %prec MUL
|
|
{
|
|
switch expr := $2.(type) {
|
|
case *NumberLiteral:
|
|
if $1.Typ == SUB {
|
|
expr.Val *= -1
|
|
}
|
|
if expr.Val > 1<<63/1e9 || expr.Val < -(1<<63)/1e9 {
|
|
yylex.(*parser).addParseErrf($1.PositionRange(), "duration out of range")
|
|
$$ = &NumberLiteral{Val: 0}
|
|
break
|
|
}
|
|
expr.PosRange.Start = $1.Pos
|
|
$$ = expr
|
|
break
|
|
case *DurationExpr:
|
|
if $1.Typ == SUB {
|
|
$$ = &DurationExpr{
|
|
Op: SUB,
|
|
RHS: expr,
|
|
StartPos: $1.Pos,
|
|
}
|
|
break
|
|
}
|
|
$$ = expr
|
|
break
|
|
default:
|
|
yylex.(*parser).addParseErrf($1.PositionRange(), "expected number literal or duration expression")
|
|
$$ = &NumberLiteral{Val: 0}
|
|
break
|
|
}
|
|
}
|
|
| duration_expr ADD duration_expr
|
|
{
|
|
yylex.(*parser).experimentalDurationExpr($1.(Expr))
|
|
$$ = &DurationExpr{Op: ADD, LHS: $1.(Expr), RHS: $3.(Expr)}
|
|
}
|
|
| duration_expr SUB duration_expr
|
|
{
|
|
yylex.(*parser).experimentalDurationExpr($1.(Expr))
|
|
$$ = &DurationExpr{Op: SUB, LHS: $1.(Expr), RHS: $3.(Expr)}
|
|
}
|
|
| duration_expr MUL duration_expr
|
|
{
|
|
yylex.(*parser).experimentalDurationExpr($1.(Expr))
|
|
$$ = &DurationExpr{Op: MUL, LHS: $1.(Expr), RHS: $3.(Expr)}
|
|
}
|
|
| duration_expr DIV duration_expr
|
|
{
|
|
yylex.(*parser).experimentalDurationExpr($1.(Expr))
|
|
if nl, ok := $3.(*NumberLiteral); ok && nl.Val == 0 {
|
|
yylex.(*parser).addParseErrf($2.PositionRange(), "division by zero")
|
|
$$ = &NumberLiteral{Val: 0}
|
|
break
|
|
}
|
|
$$ = &DurationExpr{Op: DIV, LHS: $1.(Expr), RHS: $3.(Expr)}
|
|
}
|
|
| duration_expr MOD duration_expr
|
|
{
|
|
yylex.(*parser).experimentalDurationExpr($1.(Expr))
|
|
if nl, ok := $3.(*NumberLiteral); ok && nl.Val == 0 {
|
|
yylex.(*parser).addParseErrf($2.PositionRange(), "modulo by zero")
|
|
$$ = &NumberLiteral{Val: 0}
|
|
break
|
|
}
|
|
$$ = &DurationExpr{Op: MOD, LHS: $1.(Expr), RHS: $3.(Expr)}
|
|
}
|
|
| duration_expr POW duration_expr
|
|
{
|
|
yylex.(*parser).experimentalDurationExpr($1.(Expr))
|
|
$$ = &DurationExpr{Op: POW, LHS: $1.(Expr), RHS: $3.(Expr)}
|
|
}
|
|
| STEP LEFT_PAREN RIGHT_PAREN
|
|
{
|
|
$$ = &DurationExpr{
|
|
Op: STEP,
|
|
StartPos: $1.PositionRange().Start,
|
|
EndPos: $3.PositionRange().End,
|
|
}
|
|
}
|
|
| min_max LEFT_PAREN duration_expr COMMA duration_expr RIGHT_PAREN
|
|
{
|
|
$$ = &DurationExpr{
|
|
Op: $1.Typ,
|
|
StartPos: $1.PositionRange().Start,
|
|
EndPos: $6.PositionRange().End,
|
|
LHS: $3.(Expr),
|
|
RHS: $5.(Expr),
|
|
}
|
|
}
|
|
| paren_duration_expr
|
|
;
|
|
|
|
paren_duration_expr : LEFT_PAREN duration_expr RIGHT_PAREN
|
|
{
|
|
yylex.(*parser).experimentalDurationExpr($2.(Expr))
|
|
if durationExpr, ok := $2.(*DurationExpr); ok {
|
|
durationExpr.Wrapped = true
|
|
$$ = durationExpr
|
|
break
|
|
}
|
|
$$ = $2
|
|
}
|
|
;
|
|
|
|
%%
|