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OpenSearchPPLParser.g4
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/*
* Copyright OpenSearch Contributors
* SPDX-License-Identifier: Apache-2.0
*/
parser grammar OpenSearchPPLParser;
options { tokenVocab = OpenSearchPPLLexer; }
root
: pplStatement? EOF
;
// statement
pplStatement
: dmlStatement
;
dmlStatement
: (explainCommand PIPE)? queryStatement
;
queryStatement
: pplCommands (PIPE commands)*
;
subSearch
: searchCommand (PIPE commands)*
;
// commands
pplCommands
: searchCommand
| describeCommand
;
commands
: whereCommand
| correlateCommand
| joinCommand
| fieldsCommand
| statsCommand
| dedupCommand
| sortCommand
| headCommand
| topCommand
| rareCommand
| evalCommand
| grokCommand
| parseCommand
| patternsCommand
| lookupCommand
| renameCommand
| fillnullCommand
| fieldsummaryCommand
| flattenCommand
| expandCommand
| trendlineCommand
| appendcolCommand
;
commandName
: SEARCH
| DESCRIBE
| SHOW
| AD
| ML
| KMEANS
| WHERE
| CORRELATE
| JOIN
| FIELDS
| STATS
| EVENTSTATS
| DEDUP
| EXPLAIN
| SORT
| HEAD
| TOP
| TOP_APPROX
| RARE
| RARE_APPROX
| EVAL
| GROK
| PARSE
| PATTERNS
| LOOKUP
| RENAME
| EXPAND
| FILLNULL
| FIELDSUMMARY
| FLATTEN
| TRENDLINE
| APPENDCOL
;
searchCommand
: (SEARCH)? fromClause # searchFrom
| (SEARCH)? fromClause logicalExpression # searchFromFilter
| (SEARCH)? logicalExpression fromClause # searchFilterFrom
;
fieldsummaryCommand
: FIELDSUMMARY (fieldsummaryParameter)*
;
fieldsummaryParameter
: INCLUDEFIELDS EQUAL fieldList # fieldsummaryIncludeFields
| NULLS EQUAL booleanLiteral # fieldsummaryNulls
;
describeCommand
: DESCRIBE tableSourceClause
;
explainCommand
: EXPLAIN explainMode
;
explainMode
: FORMATTED
| COST
| CODEGEN
| EXTENDED
| SIMPLE
;
showDataSourcesCommand
: SHOW DATASOURCES
;
whereCommand
: WHERE logicalExpression
;
correlateCommand
: CORRELATE correlationType FIELDS LT_PRTHS fieldList RT_PRTHS (scopeClause)? mappingList
;
correlationType
: SELF
| EXACT
| APPROXIMATE
;
scopeClause
: SCOPE LT_PRTHS fieldExpression COMMA value = literalValue (unit = timespanUnit)? RT_PRTHS
;
mappingList
: MAPPING LT_PRTHS ( mappingClause (COMMA mappingClause)* ) RT_PRTHS
;
mappingClause
: left = qualifiedName comparisonOperator right = qualifiedName # mappingCompareExpr
;
fieldsCommand
: FIELDS (PLUS | MINUS)? fieldList
;
renameCommand
: RENAME renameClasue (COMMA renameClasue)*
;
statsCommand
: (STATS | EVENTSTATS) (PARTITIONS EQUAL partitions = integerLiteral)? (ALLNUM EQUAL allnum = booleanLiteral)? (DELIM EQUAL delim = stringLiteral)? statsAggTerm (COMMA statsAggTerm)* (statsByClause)? (DEDUP_SPLITVALUES EQUAL dedupsplit = booleanLiteral)?
;
dedupCommand
: DEDUP (number = integerLiteral)? fieldList (KEEPEMPTY EQUAL keepempty = booleanLiteral)? (CONSECUTIVE EQUAL consecutive = booleanLiteral)?
;
sortCommand
: SORT sortbyClause
;
evalCommand
: EVAL evalClause (COMMA evalClause)*
;
headCommand
: HEAD (number = integerLiteral)? (FROM from = integerLiteral)?
;
topCommand
: (TOP | TOP_APPROX) (number = integerLiteral)? fieldList (byClause)?
;
rareCommand
: (RARE | RARE_APPROX) (number = integerLiteral)? fieldList (byClause)?
;
grokCommand
: GROK (source_field = expression) (pattern = stringLiteral)
;
parseCommand
: PARSE (source_field = expression) (pattern = stringLiteral)
;
patternsCommand
: PATTERNS (patternsParameter)* (source_field = expression)
;
patternsParameter
: (NEW_FIELD EQUAL new_field = stringLiteral)
| (PATTERN EQUAL pattern = stringLiteral)
;
patternsMethod
: PUNCT
| REGEX
;
// lookup
lookupCommand
: LOOKUP tableSource lookupMappingList ((APPEND | REPLACE) outputCandidateList)?
;
lookupMappingList
: lookupPair (COMMA lookupPair)*
;
outputCandidateList
: lookupPair (COMMA lookupPair)*
;
// The lookup pair will generate a K-V pair.
// The format is Key -> Alias(outputFieldName, inputField), Value -> outputField. For example:
// 1. When lookupPair is "name AS cName", the key will be Alias(cName, Field(name)), the value will be Field(cName)
// 2. When lookupPair is "dept", the key is Alias(dept, Field(dept)), value is Field(dept)
lookupPair
: inputField = fieldExpression (AS outputField = fieldExpression)?
;
fillnullCommand
: FILLNULL (fillNullWithTheSameValue
| fillNullWithFieldVariousValues)
;
fillNullWithTheSameValue
: WITH nullReplacement = valueExpression IN nullableFieldList = fieldList
;
fillNullWithFieldVariousValues
: USING nullableReplacementExpression (COMMA nullableReplacementExpression)*
;
nullableReplacementExpression
: nullableField = fieldExpression EQUAL nullableReplacement = valueExpression
;
expandCommand
: EXPAND fieldExpression (AS alias = qualifiedName)?
;
flattenCommand
: FLATTEN fieldExpression (AS alias = identifierSeq)?
;
trendlineCommand
: TRENDLINE (SORT sortField)? trendlineClause (trendlineClause)*
;
trendlineClause
: trendlineType LT_PRTHS numberOfDataPoints = INTEGER_LITERAL COMMA field = fieldExpression RT_PRTHS (AS alias = qualifiedName)?
;
trendlineType
: SMA
| WMA
;
appendcolCommand
: APPENDCOL (OVERRIDE EQUAL override = booleanLiteral)? LT_SQR_PRTHS commands (PIPE commands)* RT_SQR_PRTHS
;
kmeansCommand
: KMEANS (kmeansParameter)*
;
kmeansParameter
: (CENTROIDS EQUAL centroids = integerLiteral)
| (ITERATIONS EQUAL iterations = integerLiteral)
| (DISTANCE_TYPE EQUAL distance_type = stringLiteral)
;
adCommand
: AD (adParameter)*
;
adParameter
: (NUMBER_OF_TREES EQUAL number_of_trees = integerLiteral)
| (SHINGLE_SIZE EQUAL shingle_size = integerLiteral)
| (SAMPLE_SIZE EQUAL sample_size = integerLiteral)
| (OUTPUT_AFTER EQUAL output_after = integerLiteral)
| (TIME_DECAY EQUAL time_decay = decimalLiteral)
| (ANOMALY_RATE EQUAL anomaly_rate = decimalLiteral)
| (CATEGORY_FIELD EQUAL category_field = stringLiteral)
| (TIME_FIELD EQUAL time_field = stringLiteral)
| (DATE_FORMAT EQUAL date_format = stringLiteral)
| (TIME_ZONE EQUAL time_zone = stringLiteral)
| (TRAINING_DATA_SIZE EQUAL training_data_size = integerLiteral)
| (ANOMALY_SCORE_THRESHOLD EQUAL anomaly_score_threshold = decimalLiteral)
;
mlCommand
: ML (mlArg)*
;
mlArg
: (argName = ident EQUAL argValue = literalValue)
;
// clauses
fromClause
: SOURCE EQUAL tableOrSubqueryClause
| INDEX EQUAL tableOrSubqueryClause
;
tableOrSubqueryClause
: LT_SQR_PRTHS subSearch RT_SQR_PRTHS (AS alias = qualifiedName)?
| tableSourceClause
;
// One tableSourceClause will generate one Relation node with/without one alias
// even if the relation contains more than one table sources.
// These table sources in one relation will be readed one by one in OpenSearch.
// But it may have different behaivours in different execution backends.
// For example, a Spark UnresovledRelation node only accepts one data source.
tableSourceClause
: tableSource (COMMA tableSource)* (AS alias = qualifiedName)?
;
// join
joinCommand
: (joinType) JOIN sideAlias joinHintList? joinCriteria? right = tableOrSubqueryClause
;
joinType
: INNER?
| CROSS
| LEFT OUTER?
| RIGHT OUTER?
| FULL OUTER?
| LEFT? SEMI
| LEFT? ANTI
;
sideAlias
: (LEFT EQUAL leftAlias = ident)? COMMA? (RIGHT EQUAL rightAlias = ident)?
;
joinCriteria
: ON logicalExpression
;
joinHintList
: hintPair (COMMA? hintPair)*
;
hintPair
: leftHintKey = LEFT_HINT DOT ID EQUAL leftHintValue = ident #leftHint
| rightHintKey = RIGHT_HINT DOT ID EQUAL rightHintValue = ident #rightHint
;
renameClasue
: orignalField = wcFieldExpression AS renamedField = wcFieldExpression
;
byClause
: BY fieldList
;
statsByClause
: BY fieldList
| BY bySpanClause
| BY bySpanClause COMMA fieldList
;
bySpanClause
: spanClause (AS alias = qualifiedName)?
;
spanClause
: SPAN LT_PRTHS fieldExpression COMMA value = literalValue (unit = timespanUnit)? RT_PRTHS
;
sortbyClause
: sortField (COMMA sortField)*
;
evalClause
: fieldExpression EQUAL expression
| geoipCommand
;
geoipCommand
: fieldExpression EQUAL GEOIP LT_PRTHS ipAddress = functionArg (COMMA properties = geoIpPropertyList)? RT_PRTHS
;
// aggregation terms
statsAggTerm
: statsFunction (AS alias = wcFieldExpression)?
;
// aggregation functions
statsFunction
: statsFunctionName LT_PRTHS valueExpression RT_PRTHS # statsFunctionCall
| COUNT LT_PRTHS RT_PRTHS # countAllFunctionCall
| (DISTINCT_COUNT | DC | DISTINCT_COUNT_APPROX) LT_PRTHS valueExpression RT_PRTHS # distinctCountFunctionCall
| percentileFunctionName = (PERCENTILE | PERCENTILE_APPROX) LT_PRTHS valueExpression COMMA percent = integerLiteral RT_PRTHS # percentileFunctionCall
;
statsFunctionName
: AVG
| COUNT
| SUM
| MIN
| MAX
| STDDEV_SAMP
| STDDEV_POP
;
// expressions
expression
: logicalExpression
| valueExpression
;
logicalExpression
: NOT logicalExpression # logicalNot
| LT_PRTHS logicalExpression RT_PRTHS # parentheticLogicalExpr
| comparisonExpression # comparsion
| left = logicalExpression (AND)? right = logicalExpression # logicalAnd
| left = logicalExpression OR right = logicalExpression # logicalOr
| left = logicalExpression XOR right = logicalExpression # logicalXor
| booleanExpression # booleanExpr
;
comparisonExpression
: left = valueExpression comparisonOperator right = valueExpression # compareExpr
| valueExpression NOT? IN valueList # inExpr
| expr1 = functionArg NOT? BETWEEN expr2 = functionArg AND expr3 = functionArg # between
;
valueExpressionList
: valueExpression
| LT_PRTHS valueExpression (COMMA valueExpression)* RT_PRTHS
;
valueExpression
: left = valueExpression binaryOperator = (STAR | DIVIDE | MODULE) right = valueExpression # binaryArithmetic
| left = valueExpression binaryOperator = (PLUS | MINUS) right = valueExpression # binaryArithmetic
| primaryExpression # valueExpressionDefault
| positionFunction # positionFunctionCall
| caseFunction # caseExpr
| timestampFunction # timestampFunctionCall
| LT_PRTHS valueExpression RT_PRTHS # parentheticValueExpr
| LT_SQR_PRTHS subSearch RT_SQR_PRTHS # scalarSubqueryExpr
| ident ARROW expression # lambda
| LT_PRTHS ident (COMMA ident)+ RT_PRTHS ARROW expression # lambda
;
primaryExpression
: evalFunctionCall
| fieldExpression
| literalValue
| dataTypeFunctionCall
;
positionFunction
: positionFunctionName LT_PRTHS functionArg IN functionArg RT_PRTHS
;
booleanExpression
: booleanFunctionCall # booleanFunctionCallExpr
| isEmptyExpression # isEmptyExpr
| valueExpressionList NOT? IN LT_SQR_PRTHS subSearch RT_SQR_PRTHS # inSubqueryExpr
| EXISTS LT_SQR_PRTHS subSearch RT_SQR_PRTHS # existsSubqueryExpr
| cidrMatchFunctionCall # cidrFunctionCallExpr
;
isEmptyExpression
: (ISEMPTY | ISBLANK) LT_PRTHS functionArg RT_PRTHS
;
caseFunction
: CASE LT_PRTHS logicalExpression COMMA valueExpression (COMMA logicalExpression COMMA valueExpression)* (ELSE valueExpression)? RT_PRTHS
;
relevanceExpression
: singleFieldRelevanceFunction
| multiFieldRelevanceFunction
;
// Field is a single column
singleFieldRelevanceFunction
: singleFieldRelevanceFunctionName LT_PRTHS field = relevanceField COMMA query = relevanceQuery (COMMA relevanceArg)* RT_PRTHS
;
// Field is a list of columns
multiFieldRelevanceFunction
: multiFieldRelevanceFunctionName LT_PRTHS LT_SQR_PRTHS field = relevanceFieldAndWeight (COMMA field = relevanceFieldAndWeight)* RT_SQR_PRTHS COMMA query = relevanceQuery (COMMA relevanceArg)* RT_PRTHS
;
// tables
tableSource
: tableQualifiedName
| ID_DATE_SUFFIX
;
tableFunction
: qualifiedName LT_PRTHS functionArgs RT_PRTHS
;
// fields
fieldList
: fieldExpression (COMMA fieldExpression)*
;
wcFieldList
: wcFieldExpression (COMMA wcFieldExpression)*
;
sortField
: (PLUS | MINUS)? sortFieldExpression
;
sortFieldExpression
: fieldExpression
// TODO #963: Implement 'num', 'str', and 'ip' sort syntax
| AUTO LT_PRTHS fieldExpression RT_PRTHS
| STR LT_PRTHS fieldExpression RT_PRTHS
| IP LT_PRTHS fieldExpression RT_PRTHS
| NUM LT_PRTHS fieldExpression RT_PRTHS
;
fieldExpression
: qualifiedName
;
wcFieldExpression
: wcQualifiedName
;
// functions
evalFunctionCall
: evalFunctionName LT_PRTHS functionArgs RT_PRTHS
;
// cast function
dataTypeFunctionCall
: CAST LT_PRTHS expression AS convertedDataType RT_PRTHS
;
// boolean functions
booleanFunctionCall
: conditionFunctionBase LT_PRTHS functionArgs RT_PRTHS
;
cidrMatchFunctionCall
: CIDRMATCH LT_PRTHS ipAddress = functionArg COMMA cidrBlock = functionArg RT_PRTHS
;
convertedDataType
: typeName = DATE
| typeName = TIME
| typeName = TIMESTAMP
| typeName = INT
| typeName = INTEGER
| typeName = DOUBLE
| typeName = LONG
| typeName = FLOAT
| typeName = STRING
| typeName = BOOLEAN
;
evalFunctionName
: mathematicalFunctionName
| dateTimeFunctionName
| textFunctionName
| conditionFunctionBase
| systemFunctionName
| positionFunctionName
| coalesceFunctionName
| cryptographicFunctionName
| jsonFunctionName
| collectionFunctionName
| lambdaFunctionName
;
functionArgs
: (functionArg (COMMA functionArg)*)?
;
functionArg
: (ident EQUAL)? valueExpression
;
relevanceArg
: relevanceArgName EQUAL relevanceArgValue
;
relevanceArgName
: ALLOW_LEADING_WILDCARD
| ANALYZER
| ANALYZE_WILDCARD
| AUTO_GENERATE_SYNONYMS_PHRASE_QUERY
| BOOST
| CUTOFF_FREQUENCY
| DEFAULT_FIELD
| DEFAULT_OPERATOR
| ENABLE_POSITION_INCREMENTS
| ESCAPE
| FIELDS
| FLAGS
| FUZZINESS
| FUZZY_MAX_EXPANSIONS
| FUZZY_PREFIX_LENGTH
| FUZZY_REWRITE
| FUZZY_TRANSPOSITIONS
| LENIENT
| LOW_FREQ_OPERATOR
| MAX_DETERMINIZED_STATES
| MAX_EXPANSIONS
| MINIMUM_SHOULD_MATCH
| OPERATOR
| PHRASE_SLOP
| PREFIX_LENGTH
| QUOTE_ANALYZER
| QUOTE_FIELD_SUFFIX
| REWRITE
| SLOP
| TIE_BREAKER
| TIME_ZONE
| TYPE
| ZERO_TERMS_QUERY
;
relevanceFieldAndWeight
: field = relevanceField
| field = relevanceField weight = relevanceFieldWeight
| field = relevanceField BIT_XOR_OP weight = relevanceFieldWeight
;
relevanceFieldWeight
: integerLiteral
| decimalLiteral
;
relevanceField
: qualifiedName
| stringLiteral
;
relevanceQuery
: relevanceArgValue
;
relevanceArgValue
: qualifiedName
| literalValue
;
mathematicalFunctionName
: ABS
| CBRT
| CEIL
| CEILING
| CONV
| CRC32
| E
| EXP
| FLOOR
| LN
| LOG
| LOG10
| LOG2
| MOD
| PI
| POW
| POWER
| RAND
| ROUND
| SIGN
| SIGNUM
| SQRT
| TRUNCATE
| trigonometricFunctionName
;
trigonometricFunctionName
: ACOS
| ASIN
| ATAN
| ATAN2
| COS
| COT
| DEGREES
| RADIANS
| SIN
| TAN
;
cryptographicFunctionName
: MD5
| SHA1
| SHA2
;
dateTimeFunctionName
: ADDDATE
| ADDTIME
| CONVERT_TZ
| CURDATE
| CURRENT_DATE
| CURRENT_TIME
| CURRENT_TIMESTAMP
| CURRENT_TIMEZONE
| CURTIME
| DATE
| DATEDIFF
| DATETIME
| DATE_ADD
| DATE_FORMAT
| DATE_SUB
| DAY
| DAYNAME
| DAYOFMONTH
| DAYOFWEEK
| DAYOFYEAR
| DAY_OF_MONTH
| DAY_OF_WEEK
| DAY_OF_YEAR
| FROM_DAYS
| FROM_UNIXTIME
| HOUR
| HOUR_OF_DAY
| LAST_DAY
| LOCALTIME
| LOCALTIMESTAMP
| MAKEDATE
| MAKE_DATE
| MAKETIME
| MICROSECOND
| MINUTE
| MINUTE_OF_DAY
| MINUTE_OF_HOUR
| MONTH
| MONTHNAME
| MONTH_OF_YEAR
| NOW
| PERIOD_ADD
| PERIOD_DIFF
| QUARTER
| SECOND
| SECOND_OF_MINUTE
| SEC_TO_TIME
| STR_TO_DATE
| SUBDATE
| SUBTIME
| SYSDATE
| TIME
| TIMEDIFF
| TIMESTAMP
| TIME_FORMAT
| TIME_TO_SEC
| TO_DAYS
| TO_SECONDS
| UNIX_TIMESTAMP
| UTC_DATE
| UTC_TIME
| UTC_TIMESTAMP
| WEEK
| WEEKDAY
| WEEK_OF_YEAR
| YEAR
| YEARWEEK
| relativeTimeFunctionName
;
relativeTimeFunctionName
: RELATIVE_TIMESTAMP
| EARLIEST
| LATEST
;
getFormatFunction
: GET_FORMAT LT_PRTHS getFormatType COMMA functionArg RT_PRTHS
;
getFormatType
: DATE
| DATETIME
| TIME
| TIMESTAMP
;
extractFunction
: EXTRACT LT_PRTHS datetimePart FROM functionArg RT_PRTHS
;
simpleDateTimePart
: MICROSECOND
| SECOND
| MINUTE
| HOUR
| DAY
| WEEK
| MONTH
| QUARTER
| YEAR
;
complexDateTimePart
: SECOND_MICROSECOND
| MINUTE_MICROSECOND
| MINUTE_SECOND
| HOUR_MICROSECOND
| HOUR_SECOND
| HOUR_MINUTE
| DAY_MICROSECOND
| DAY_SECOND
| DAY_MINUTE
| DAY_HOUR
| YEAR_MONTH
;
datetimePart
: simpleDateTimePart
| complexDateTimePart
;
timestampFunction
: timestampFunctionName LT_PRTHS simpleDateTimePart COMMA firstArg = functionArg COMMA secondArg = functionArg RT_PRTHS
;
timestampFunctionName
: TIMESTAMPADD
| TIMESTAMPDIFF
;
// condition function return boolean value
conditionFunctionBase
: LIKE
| IF
| ISNULL
| ISNOTNULL
| IFNULL
| NULLIF
| ISPRESENT
| JSON_VALID
| EARLIEST
| LATEST
;
systemFunctionName
: TYPEOF
;
textFunctionName
: SUBSTR
| SUBSTRING
| TRIM
| LTRIM
| RTRIM
| LOWER
| UPPER
| CONCAT
| CONCAT_WS
| LENGTH
| STRCMP
| RIGHT
| LEFT
| ASCII
| LOCATE
| REPLACE
| REVERSE
| ISEMPTY
| ISBLANK
;
jsonFunctionName
: JSON
| JSON_OBJECT
| JSON_ARRAY
| JSON_ARRAY_LENGTH
| TO_JSON_STRING
| JSON_EXTRACT
| JSON_DELETE
| JSON_APPEND
| JSON_KEYS
| JSON_VALID
// | JSON_EXTEND
// | JSON_SET
// | JSON_ARRAY_ALL_MATCH
// | JSON_ARRAY_ANY_MATCH
// | JSON_ARRAY_FILTER
// | JSON_ARRAY_MAP
// | JSON_ARRAY_REDUCE
;
collectionFunctionName
: ARRAY
| ARRAY_LENGTH
;
lambdaFunctionName
: FORALL
| EXISTS
| FILTER
| TRANSFORM
| REDUCE
;
positionFunctionName
: POSITION
;
coalesceFunctionName
: COALESCE
;
geoIpPropertyList
: geoIpProperty (COMMA geoIpProperty)*
;
geoIpProperty
: COUNTRY_ISO_CODE
| COUNTRY_NAME
| CONTINENT_NAME
| REGION_ISO_CODE
| REGION_NAME
| CITY_NAME
| TIME_ZONE
| LOCATION
;
// operators
comparisonOperator
: EQUAL
| NOT_EQUAL
| LESS
| NOT_LESS
| GREATER
| NOT_GREATER
| REGEXP
;
singleFieldRelevanceFunctionName
: MATCH
| MATCH_PHRASE
| MATCH_BOOL_PREFIX
| MATCH_PHRASE_PREFIX
;
multiFieldRelevanceFunctionName
: SIMPLE_QUERY_STRING
| MULTI_MATCH
| QUERY_STRING
;
// literals and values
literalValue
: stringLiteral
| integerLiteral
| decimalLiteral
| booleanLiteral
| datetimeLiteral //#datetime
| intervalLiteral
;
intervalLiteral
: INTERVAL valueExpression intervalUnit
;
stringLiteral
: DQUOTA_STRING
| SQUOTA_STRING
;
integerLiteral
: (PLUS | MINUS)? INTEGER_LITERAL
;
decimalLiteral
: (PLUS | MINUS)? DECIMAL_LITERAL
;
booleanLiteral
: TRUE
| FALSE
;
// Date and Time Literal, follow ANSI 92
datetimeLiteral
: dateLiteral