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Data transformation expression usage in mapping data flow

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APPLIES TO: Azure Data Factory Azure Synapse Analytics

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Data flows are available both in Azure Data Factory and Azure Synapse Pipelines. This article applies to mapping data flows. If you are new to transformations, please refer to the introductory article Transform data using a mapping data flow.

The following articles provide details about usage of all expressions and functions supported by Azure Data Factory and Azure Synapse Analytics in mapping data flows. For summaries of each type of function supported, reference the following articles:

Alphabetical listing of all functions

Following is an alphabetical listing of all functions available in mapping data flows.

A

abs

abs(<value1> : number) => number

Absolute value of a number.

  • abs(-20) -> 20
  • abs(10) -> 10

acos

acos(<value1> : number) => double

Calculates a cosine inverse value.

  • acos(1) -> 0.0

add

add(<value1> : any, <value2> : any) => any

Adds a pair of strings or numbers. Adds a date to a number of days. Adds a duration to a timestamp. Appends one array of similar type to another. Same as the + operator.

  • add(10, 20) -> 30
  • 10 + 20 -> 30
  • add('ice', 'cream') -> 'icecream'
  • 'ice' + 'cream' + ' cone' -> 'icecream cone'
  • add(toDate('2012-12-12'), 3) -> toDate('2012-12-15')
  • toDate('2012-12-12') + 3 -> toDate('2012-12-15')
  • [10, 20] + [30, 40] -> [10, 20, 30, 40]
  • toTimestamp('2019-02-03 05:19:28.871', 'yyyy-MM-dd HH:mm:ss.SSS') + (days(1) + hours(2) - seconds(10)) -> toTimestamp('2019-02-04 07:19:18.871', 'yyyy-MM-dd HH:mm:ss.SSS')

addDays

addDays(<date/timestamp> : datetime, <days to add> : integral) => datetime

Add days to a date or timestamp. Same as the + operator for date.

  • addDays(toDate('2016-08-08'), 1) -> toDate('2016-08-09')

addMonths

addMonths(<date/timestamp> : datetime, <months to add> : integral, [<value3> : string]) => datetime

Add months to a date or timestamp. You can optionally pass a timezone.

  • addMonths(toDate('2016-08-31'), 1) -> toDate('2016-09-30')
  • addMonths(toTimestamp('2016-09-30 10:10:10'), -1) -> toTimestamp('2016-08-31 10:10:10')

and

and(<value1> : boolean, <value2> : boolean) => boolean

Logical AND operator. Same as &&.

  • and(true, false) -> false
  • true && false -> false

approxDistinctCount

approxDistinctCount(<value1> : any, [ <value2> : double ]) => long

Gets the approximate aggregate count of distinct values for a column. The optional second parameter is to control the estimation error.

  • approxDistinctCount(ProductID, .05) => long

array

array([<value1> : any], ...) => array

Creates an array of items. All items should be of the same type. If no items are specified, an empty string array is the default. Same as a [] creation operator.

  • array('Seattle', 'Washington')
  • ['Seattle', 'Washington']
  • ['Seattle', 'Washington'][1]
  • 'Washington'

ascii

ascii(<Input> : string) => number

Returns the numeric value of the input character. If the input string has more than one character, the numeric value of the first character is returned

  • ascii('A') -> 65
  • ascii('a') -> 97

asin

asin(<value1> : number) => double

Calculates an inverse sine value.

  • asin(0) -> 0.0

assertErrorMessages

assertErrorMessages() => map

Returns a map of all error messages for the row with assert ID as the key.

Examples

  • assertErrorMessages() => ['assert1': 'This row failed on assert1.', 'assert2': 'This row failed on assert2.']. In this example, at(assertErrorMessages(), 'assert1') would return 'This row failed on assert1.'

associate

reassociate(<value1> : map, <value2> : binaryFunction) => map

Creates a map of key/values. All the keys & values should be of the same type. If no items are specified, it's defaulted to a map of string to string type. Same as a [ -> ] creation operator. Keys and values should alternate with each other.

  • associate('fruit', 'apple', 'vegetable', 'carrot' )=> ['fruit' -> 'apple', 'vegetable' -> 'carrot']

at

at(<value1> : array/map, <value2> : integer/key type) => array

Finds the element at an array index. The index is 1-based. Out of bounds index results in a null value. Finds a value in a map given a key. If the key is not found, it returns null.

  • at(['apples', 'pears'], 1) => 'apples'
  • at(['fruit' -> 'apples', 'vegetable' -> 'carrot'], 'fruit') => 'apples'

atan

atan(<value1> : number) => double

Calculates an inverse tangent value.

  • atan(0) -> 0.0

atan2

atan2(<value1> : number, <value2> : number) => double

Returns the angle in radians between the positive x-axis of a plane and the point given by the coordinates.

  • atan2(0, 0) -> 0.0

avg

avg(<value1> : number) => number

Gets the average of values of a column.

  • avg(sales)

avgIf

avgIf(<value1> : boolean, <value2> : number) => number

Based on a criteria gets the average of values of a column.

  • avgIf(region == 'West', sales)

B

between

between(<value1> : any, <value2> : any, <value3> : any) => boolean

Checks if the first value is in between two other values inclusively. Numeric, string and datetime values can be compared

  • between(10, 5, 24)
  • true
  • between(currentDate(), currentDate() + 10, currentDate() + 20)
  • false

bitwiseAnd

bitwiseAnd(<value1> : integral, <value2> : integral) => integral

Bitwise And operator across integral types. Same as & operator

  • bitwiseAnd(0xf4, 0xef)
  • 0xe4
  • (0xf4 & 0xef)
  • 0xe4

bitwiseOr

bitwiseOr(<value1> : integral, <value2> : integral) => integral

Bitwise Or operator across integral types. Same as | operator

  • bitwiseOr(0xf4, 0xef)
  • 0xff
  • (0xf4 | 0xef)
  • 0xff

bitwiseXor

bitwiseXor(<value1> : any, <value2> : any) => any

Bitwise Or operator across integral types. Same as | operator

  • bitwiseXor(0xf4, 0xef)
  • 0x1b
  • (0xf4 ^ 0xef)
  • 0x1b
  • (true ^ false)
  • true
  • (true ^ true)
  • false

blake2b

blake2b(<value1> : integer, <value2> : any, ...) => string

Calculates the Blake2 digest of set of column of varying primitive datatypes given a bit length, which can only be multiples of 8 between 8 & 512. It can be used to calculate a fingerprint for a row

  • blake2b(256, 'gunchus', 8.2, 'bojjus', true, toDate('2010-4-4'))
  • 'c9521a5080d8da30dffb430c50ce253c345cc4c4effc315dab2162dac974711d'

blake2bBinary

blake2bBinary(<value1> : integer, <value2> : any, ...) => binary

Calculates the Blake2 digest of set of column of varying primitive datatypes given a bit length, which can only be multiples of 8 between 8 & 512. It can be used to calculate a fingerprint for a row

  • blake2bBinary(256, 'gunchus', 8.2, 'bojjus', true, toDate('2010-4-4'))
  • unHex('c9521a5080d8da30dffb430c50ce253c345cc4c4effc315dab2162dac974711d')

byItem

byItem(<parent column> : any, <column name> : string) => any

Find a sub item within a structure or array of structure. If there are multiple matches, the first match is returned. If no match it returns a NULL value. The returned value has to be type converted by one of the type conversion actions(? date, ? string ...). Column names known at design time should be addressed just by their name. Computed inputs aren't supported but you can use parameter substitutions

  • byItem( byName('customer'), 'orderItems') ? (itemName as string, itemQty as integer)
  • byItem( byItem( byName('customer'), 'orderItems'), 'itemName') ? string

byName

byName(<column name> : string, [<stream name> : string]) => any

Selects a column value by name in the stream. You can pass an optional stream name as the second argument. If there are multiple matches, the first match is returned. If no match it returns a NULL value. The returned value has to be type converted by one of the type conversion functions(TO_DATE, TO_STRING ...). Column names known at design time should be addressed just by their name. Computed inputs aren't supported but you can use parameter substitutions.

  • toString(byName('parent'))
  • toLong(byName('income'))
  • toBoolean(byName('foster'))
  • toLong(byName($debtCol))
  • toString(byName('Bogus Column'))
  • toString(byName('Bogus Column', 'DeriveStream'))

byNames

byNames(<column names> : array, [<stream name> : string]) => any

Select an array of columns by name in the stream. You can pass an optional stream name as the second argument. If there are multiple matches, the first match is returned. If there are no matches for a column, the entire output is a NULL value. The returned value requires a type conversion function (toDate, toString, ...). Column names known at design time should be addressed just by their name. Computed inputs aren't supported but you can use parameter substitutions.

  • toString(byNames(['parent', 'child']))
  • byNames(['parent']) ? string
  • toLong(byNames(['income']))
  • byNames(['income']) ? long
  • toBoolean(byNames(['foster']))
  • toLong(byNames($debtCols))
  • toString(byNames(['a Column']))
  • toString(byNames(['a Column'], 'DeriveStream'))
  • byNames(['orderItem']) ? (itemName as string, itemQty as integer)

byOrigin

byOrigin(<column name> : string, [<origin stream name> : string]) => any

Selects a column value by name in the origin stream. The second argument is the origin stream name. If there are multiple matches, the first match is returned. If no match it returns a NULL value. The returned value has to be type converted by one of the type conversion functions(TO_DATE, TO_STRING ...). Column names known at design time should be addressed just by their name. Computed inputs aren't supported but you can use parameter substitutions.

  • toString(byOrigin('ancestor', 'ancestorStream'))

byOrigins

byOrigins(<column names> : array, [<origin stream name> : string]) => any

Selects an array of columns by name in the stream. The second argument is the stream where it originated from. If there are multiple matches, the first match is returned. If no match it returns a NULL value. The returned value has to be type converted by one of the type conversion functions(TO_DATE, TO_STRING ...) Column names known at design time should be addressed just by their name. Computed inputs aren't supported but you can use parameter substitutions.

  • toString(byOrigins(['ancestor1', 'ancestor2'], 'ancestorStream'))

byPath

byPath(<value1> : string, [<streamName> : string]) => any

Finds a hierarchical path by name in the stream. You can pass an optional stream name as the second argument. If no such path is found, it returns null. Column names/paths known at design time should be addressed just by their name or dot notation path. Computed inputs aren't supported but you can use parameter substitutions.

  • byPath('grandpa.parent.child') => column

byPosition

byPosition(<position> : integer) => any

Selects a column value by its relative position(1 based) in the stream. If the position is out of bounds, it returns a NULL value. The returned value has to be type converted by one of the type conversion functions(TO_DATE, TO_STRING ...) Computed inputs aren't supported but you can use parameter substitutions.

  • toString(byPosition(1))
  • toDecimal(byPosition(2), 10, 2)
  • toBoolean(byName(4))
  • toString(byName($colName))
  • toString(byPosition(1234))

C

case

case(<condition> : boolean, <true_expression> : any, <false_expression> : any, ...) => any

Based on alternating conditions applies one value or the other. If the number of inputs are even, the other is defaulted to NULL for last condition.

  • case(10 + 20 == 30, 'dumbo', 'gumbo') -> 'dumbo'
  • case(10 + 20 == 25, 'bojjus', 'do' < 'go', 'gunchus') -> 'gunchus'
  • isNull(case(10 + 20 == 25, 'bojjus', 'do' > 'go', 'gunchus')) -> true
  • case(10 + 20 == 25, 'bojjus', 'do' > 'go', 'gunchus', 'dumbo') -> 'dumbo'

cbrt

cbrt(<value1> : number) => double

Calculates the cube root of a number.

  • cbrt(8) -> 2.0

ceil

ceil(<value1> : number) => number

Returns the smallest integer not smaller than the number.

  • ceil(-0.1) -> 0

char

char(<Input> : number) => string

Returns the ascii character represented by the input number. If number is greater than 256, the result is equivalent to char(number % 256)

  • char(65) -> 'A'
  • char(97) -> 'a'

coalesce

coalesce(<value1> : any, ...) => any

Returns the first not null value from a set of inputs. All inputs should be of the same type.

  • coalesce(10, 20) -> 10
  • coalesce(toString(null), toString(null), 'dumbo', 'bo', 'go') -> 'dumbo'

collect

collect(<value1> : any) => array

Collects all values of the expression in the aggregated group into an array. Structures can be collected and transformed to alternate structures during this process. The number of items will be equal to the number of rows in that group and can contain null values. The number of collected items should be small.

  • collect(salesPerson)
  • collect(firstName + lastName))
  • collect(@(name = salesPerson, sales = salesAmount) )

collectUnique

collectUnique(<value1> : any) => array

Collects all values of the expression in the aggregated group into a unique array. Structures can be collected and transformed to alternate structures during this process. The number of items will be equal to the number of rows in that group and can contain null values. The number of collected items should be small.

  • collect(salesPerson)
  • collect(firstName + lastName))
  • collect(@(name = salesPerson, sales = salesAmount) )

columnNames

columnNames(<value1> : string, i><value1> : boolean) => array

Gets the names of all output columns for a stream. You can pass an optional stream name as the first argument. The second argument is also optional, with false as the default. If you set the second argument to true(), ADF will return only columns that are drifted via schema drift.

  • columnNames()
  • columnNames('DeriveStream')
  • columnNames('DeriveStream', true())
  • columnNames('', true())

columns

columns([<stream name> : string]) => any

Gets the values of all output columns for a stream. You can pass an optional stream name as the second argument.

  • columns()
  • columns('DeriveStream')

compare

compare(<value1> : any, <value2> : any) => integer

Compares two values of the same type. Returns negative integer if value1 < value2, 0 if value1 == value2, positive value if value1 > value2.

  • (compare(12, 24) < 1) -> true
  • (compare('dumbo', 'dum') > 0) -> true

concat

concat(<this> : string, <that> : string, ...) => string

Concatenates a variable number of strings together. Same as the + operator with strings.

  • concat('dataflow', 'is', 'awesome') -> 'dataflowisawesome'
  • 'dataflow' + 'is' + 'awesome' -> 'dataflowisawesome'
  • isNull('sql' + null) -> true

concatWS

concatWS(<separator> : string, <this> : string, <that> : string, ...) => string

Concatenates a variable number of strings together with a separator. The first parameter is the separator.

  • concatWS(' ', 'dataflow', 'is', 'awesome') -> 'dataflow is awesome'
  • isNull(concatWS(null, 'dataflow', 'is', 'awesome')) -> true
  • concatWS(' is ', 'dataflow', 'awesome') -> 'dataflow is awesome'

contains

contains(<value1> : array, <value2> : unaryfunction) => boolean

Returns true if any element in the provided array evaluates as true in the provided predicate. Contains expects a reference to one element in the predicate function as #item.

  • contains([1, 2, 3, 4], #item == 3) -> true
  • contains([1, 2, 3, 4], #item > 5) -> false

cos

cos(<value1> : number) => double

Calculates a cosine value.

  • cos(10) -> -0.8390715290764524

cosh

cosh(<value1> : number) => double

Calculates a hyperbolic cosine of a value.

  • cosh(0) -> 1.0

count

count([<value1> : any]) => long

Gets the aggregate count of values. If the optional column(s) is specified, it ignores NULL values in the count.

  • count(custId)
  • count(custId, custName)
  • count()
  • count(iif(isNull(custId), 1, NULL))

countAll

countAll([<value1> : any]) => long

Gets the aggregate count of values including nulls.

  • countAll(custId)
  • countAll()

countDistinct

countDistinct(<value1> : any, [<value2> : any], ...) => long

Gets the aggregate count of distinct values of a set of columns.

  • countDistinct(custId, custName)

countAllDistinct

countAllDistinct(<value1> : any, [<value2> : any], ...) => long

Gets the aggregate count of distinct values of a set of columns including nulls.

  • countAllDistinct(custId, custName)

countIf

countIf(<value1> : boolean, [<value2> : any]) => long

Based on a criteria gets the aggregate count of values. If the optional column is specified, it ignores NULL values in the count.

  • countIf(state == 'CA' && commission < 10000, name)

covariancePopulation

covariancePopulation(<value1> : number, <value2> : number) => double

Gets the population covariance between two columns.

  • covariancePopulation(sales, profit)

covariancePopulationIf

covariancePopulationIf(<value1> : boolean, <value2> : number, <value3> : number) => double

Based on a criteria, gets the population covariance of two columns.

  • covariancePopulationIf(region == 'West', sales)

covarianceSample

covarianceSample(<value1> : number, <value2> : number) => double

Gets the sample covariance of two columns.

  • covarianceSample(sales, profit)

covarianceSampleIf

covarianceSampleIf(<value1> : boolean, <value2> : number, <value3> : number) => double

Based on a criteria, gets the sample covariance of two columns.

  • covarianceSampleIf(region == 'West', sales, profit)

crc32

crc32(<value1> : any, ...) => long

Calculates the CRC32 hash of set of column of varying primitive datatypes given a bit length, which can only be of values 0(256), 224, 256, 384, 512. It can be used to calculate a fingerprint for a row.

  • crc32(256, 'gunchus', 8.2, 'bojjus', true, toDate('2010-4-4')) -> 3630253689L

cumeDist

cumeDist() => integer

The CumeDist function computes the position of a value relative to all values in the partition. The result is the number of rows preceding or equal to the current row in the ordering of the partition divided by the total number of rows in the window partition. Any tie values in the ordering will evaluate to the same position.

  • cumeDist()

currentDate

currentDate([<value1> : string]) => date

Gets the current date when this job starts to run. You can pass an optional timezone in the form of 'GMT', 'PST', 'UTC', 'America/Cayman'. The local timezone of the data factory's data center/region is used as the default. Refer to Java's SimpleDateFormat class for available formats. https://docs.oracle.com/javase/8/docs/api/java/text/SimpleDateFormat.html.

  • currentDate() == toDate('2250-12-31') -> false
  • currentDate('PST') == toDate('2250-12-31') -> false
  • currentDate('America/New_York') == toDate('2250-12-31') -> false

currentTimestamp

currentTimestamp() => timestamp

Gets the current timestamp when the job starts to run with local time zone.

  • currentTimestamp() == toTimestamp('2250-12-31 12:12:12') -> false

currentUTC

currentUTC([<value1> : string]) => timestamp

Gets the current timestamp as UTC. If you want your current time to be interpreted in a different timezone than your cluster time zone, you can pass an optional timezone in the form of 'GMT', 'PST', 'UTC', 'America/Cayman'. It's defaulted to the current timezone. Refer to Java's SimpleDateFormat class for available formats. https://docs.oracle.com/javase/8/docs/api/java/text/SimpleDateFormat.html. To convert the UTC time to a different timezone use fromUTC().

  • currentUTC() == toTimestamp('2050-12-12 19:18:12') -> false
  • currentUTC() != toTimestamp('2050-12-12 19:18:12') -> true
  • fromUTC(currentUTC(), 'Asia/Seoul') != toTimestamp('2050-12-12 19:18:12') -> true

D

dayOfMonth

dayOfMonth(<value1> : datetime) => integer

Gets the day of the month given a date.

  • dayOfMonth(toDate('2018-06-08')) -> 8

dayOfWeek

dayOfWeek(<value1> : datetime) => integer

Gets the day of the week given a date. 1 - Sunday, 2 - Monday ..., 7 - Saturday.

  • dayOfWeek(toDate('2018-06-08')) -> 6

dayOfYear

dayOfYear(<value1> : datetime) => integer

Gets the day of the year given a date.

  • dayOfYear(toDate('2016-04-09')) -> 100

days

days(<value1> : integer) => long

Duration in milliseconds for number of days.

  • days(2) -> 172800000L

decode

decode(<Input> : any, <Charset> : string) => binary

Decodes the encoded input data into a string based on the given charset. A second (optional) argument can be used to specify which charset to use - 'US-ASCII', 'ISO-8859-1', 'UTF-8' (default), 'UTF-16BE', 'UTF-16LE', 'UTF-16'

  • decode(array(toByte(97),toByte(98),toByte(99)), 'US-ASCII') -> abc

degrees

degrees(<value1> : number) => double

Converts radians to degrees.

  • degrees(3.141592653589793) -> 180

denseRank

denseRank() => integer

Computes the rank of a value in a group of values specified in a window's order by clause. The result is one plus the number of rows preceding or equal to the current row in the ordering of the partition. The values won't produce gaps in the sequence. Dense Rank works even when data isn't sorted and looks for change in values.

  • denseRank()

distinct

distinct(<value1> : array) => array

Returns a distinct set of items from an array.

  • distinct([10, 20, 30, 10]) => [10, 20, 30]

divide

divide(<value1> : any, <value2> : any) => any

Divides pair of numbers. Same as the / operator.

  • divide(20, 10) -> 2
  • 20 / 10 -> 2

dropLeft

dropLeft(<value1> : string, <value2> : integer) => string

Removes as many characters from the left of the string. If the drop requested exceeds the length of the string, an empty string is returned.

  • dropLeft('bojjus', 2) => 'jjus'
  • dropLeft('cake', 10) => ''

dropRight

dropRight(<value1> : string, <value2> : integer) => string

Removes as many characters from the right of the string. If the drop requested exceeds the length of the string, an empty string is returned.

  • dropRight('bojjus', 2) => 'bojj'
  • dropRight('cake', 10) => ''

E

encode

encode(<Input> : string, <Charset> : string) => binary

Encodes the input string data into binary based on a charset. A second (optional) argument can be used to specify which charset to use - 'US-ASCII', 'ISO-8859-1', 'UTF-8' (default), 'UTF-16BE', 'UTF-16LE', 'UTF-16'

  • encode('abc', 'US-ASCII') -> array(toByte(97),toByte(98),toByte(99))

Input string: string, Charset: string) => binary

endsWith

endsWith(<string> : string, <substring to check> : string) => boolean

Checks if the string ends with the supplied string.

  • endsWith('dumbo', 'mbo') -> true

equals

equals(<value1> : any, <value2> : any) => boolean

Comparison equals operator. Same as == operator.

  • equals(12, 24) -> false
  • 12 == 24 -> false
  • 'bad' == 'bad' -> true
  • isNull('good' == toString(null)) -> true
  • isNull(null == null) -> true

equalsIgnoreCase

equalsIgnoreCase(<value1> : string, <value2> : string) => boolean

Comparison equals operator ignoring case. Same as <=> operator.

  • 'abc'<=>'Abc' -> true
  • equalsIgnoreCase('abc', 'Abc') -> true

escape

escape(<string_to_escape> : string, <format> : string) => string

Escapes a string according to a format. Literal values for acceptable format are 'json', 'xml', 'ecmascript', 'html', 'java'.

except

except(<value1> : array, <value2> : array) => array

Returns a difference set of one array from another dropping duplicates.

  • except([10, 20, 30], [20, 40]) => [10, 30]

expr

expr(<expr> : string) => any

Results in an expression from a string. This is the same as writing this expression in a non-literal form. This can be used to pass parameters as string representations.

  • expr('price * discount') => any

F

factorial

factorial(<value1> : number) => long

Calculates the factorial of a number.

  • factorial(5) -> 120

false

false() => boolean

Always returns a false value. Use the function syntax(false()) if there's a column named 'false'.

  • (10 + 20 > 30) -> false
  • (10 + 20 > 30) -> false()

filter

filter(<value1> : array, <value2> : unaryfunction) => array

Filters elements out of the array that don't meet the provided predicate. Filter expects a reference to one element in the predicate function as #item.

  • filter([1, 2, 3, 4], #item > 2) -> [3, 4]
  • filter(['a', 'b', 'c', 'd'], #item == 'a' || #item == 'b') -> ['a', 'b']

find

find(<value1> : array, <value2> : unaryfunction) => any

Find the first item from an array that matches the condition. It takes a filter function where you can address the item in the array as #item. For deeply nested maps you can refer to the parent maps using the #item_n(#item_1, #item_2...) notation.

  • find([10, 20, 30], #item > 10) -> 20
  • find(['azure', 'data', 'factory'], length(#item) > 4) -> 'azure'
  • find([ @( name = 'Daniel', types = [ @(mood = 'jovial', behavior = 'terrific'), @(mood = 'grumpy', behavior = 'bad') ] ), @( name = 'Mark', types = [ @(mood = 'happy', behavior = 'awesome'), @(mood = 'calm', behavior = 'reclusive') ] ) ], contains(#item.types, #item.mood=='happy') /*Filter out the happy kid*/ )
  • @( name = 'Mark', types = [ @(mood = 'happy', behavior = 'awesome'), @(mood = 'calm', behavior = 'reclusive') ] )

first

first(<value1> : any, [<value2> : boolean]) => any

Gets the first value of a column group. If the second parameter ignoreNulls is omitted, it's assumed false.

  • first(sales)
  • first(sales, false)

flatten

flatten(<array> : array, <value2> : array ..., <value2> : boolean) => array

Flattens array or arrays into a single array. Arrays of atomic items are returned unaltered. The last argument is optional and is defaulted to false to flatten recursively more than one level deep.

  • flatten([['bojjus', 'girl'], ['gunchus', 'boy']]) => ['bojjus', 'girl', 'gunchus', 'boy']
  • flatten([[['bojjus', 'gunchus']]] , true) => ['bojjus', 'gunchus']

floor

floor(<value1> : number) => number

Returns the largest integer not greater than the number.

  • floor(-0.1) -> -1

fromBase64

fromBase64(<value1> : string, <encoding type> : string) => string

Decodes the given base64-encoded string. You can optionally pass the encoding type.

  • fromBase64('Z3VuY2h1cw==') -> 'gunchus'
  • fromBase64('SGVsbG8gV29ybGQ=', 'Windows-1252') -> 'Hello World'

fromUTC

fromUTC(<value1> : timestamp, [<value2> : string]) => timestamp

Converts to the timestamp from UTC. You can optionally pass the timezone in the form of 'GMT', 'PST', 'UTC', 'America/Cayman'. It's defaulted to the current timezone. Refer to Java's SimpleDateFormat class for available formats. https://docs.oracle.com/javase/8/docs/api/java/text/SimpleDateFormat.html.

  • fromUTC(currentTimestamp()) == toTimestamp('2050-12-12 19:18:12') -> false
  • fromUTC(currentTimestamp(), 'Asia/Seoul') != toTimestamp('2050-12-12 19:18:12') -> true

G

greater

greater(<value1> : any, <value2> : any) => boolean

Comparison greater operator. Same as > operator.

  • greater(12, 24) -> false
  • ('dumbo' > 'dum') -> true
  • (toTimestamp('2019-02-05 08:21:34.890', 'yyyy-MM-dd HH:mm:ss.SSS') > toTimestamp('2019-02-03 05:19:28.871', 'yyyy-MM-dd HH:mm:ss.SSS')) -> true

greaterOrEqual

greaterOrEqual(<value1> : any, <value2> : any) => boolean

Comparison greater than or equal operator. Same as >= operator.

  • greaterOrEqual(12, 12) -> true
  • ('dumbo' >= 'dum') -> true

greatest

greatest(<value1> : any, ...) => any

Returns the greatest value among the list of values as input skipping null values. Returns null if all inputs are null.

  • greatest(10, 30, 15, 20) -> 30
  • greatest(10, toInteger(null), 20) -> 20
  • greatest(toDate('2010-12-12'), toDate('2011-12-12'), toDate('2000-12-12')) -> toDate('2011-12-12')
  • greatest(toTimestamp('2019-02-03 05:19:28.871', 'yyyy-MM-dd HH:mm:ss.SSS'), toTimestamp('2019-02-05 08:21:34.890', 'yyyy-MM-dd HH:mm:ss.SSS')) -> toTimestamp('2019-02-05 08:21:34.890', 'yyyy-MM-dd HH:mm:ss.SSS')

H

hasColumn

hasColumn(<column name> : string, [<stream name> : string]) => boolean

Checks for a column value by name in the stream. You can pass an optional stream name as the second argument. Column names known at design time should be addressed just by their name. Computed inputs aren't supported but you can use parameter substitutions.

  • hasColumn('parent')

hasError

hasError([<value1> : string]) => boolean

Checks if the assert with provided ID is marked as error.

Examples

  • hasError('assert1')
  • hasError('assert2')

hasPath

hasPath(<value1> : string, [<streamName> : string]) => boolean

Checks if a certain hierarchical path exists by name in the stream. You can pass an optional stream name as the second argument. Column names/paths known at design time should be addressed just by their name or dot notation path. Computed inputs aren't supported but you can use parameter substitutions.

  • hasPath('grandpa.parent.child') => boolean

hex

hex(<value1>: binary) => string

Returns a hex string representation of a binary value

  • hex(toBinary([toByte(0x1f), toByte(0xad), toByte(0xbe)])) -> '1fadbe'

hour

hour(<value1> : timestamp, [<value2> : string]) => integer

Gets the hour value of a timestamp. You can pass an optional timezone in the form of 'GMT', 'PST', 'UTC', 'America/Cayman'. The local timezone is used as the default. Refer to Java's SimpleDateFormat class for available formats. https://docs.oracle.com/javase/8/docs/api/java/text/SimpleDateFormat.html.

  • hour(toTimestamp('2009-07-30 12:58:59')) -> 12
  • hour(toTimestamp('2009-07-30 12:58:59'), 'PST') -> 12

hours

hours(<value1> : integer) => long

Duration in milliseconds for number of hours.

  • hours(2) -> 7200000L

I

iif

iif(<condition> : boolean, <true_expression> : any, [<false_expression> : any]) => any

Based on a condition applies one value or the other. If other is unspecified, it's considered NULL. Both the values must be compatible(numeric, string...).

  • iif(10 + 20 == 30, 'dumbo', 'gumbo') -> 'dumbo'
  • iif(10 > 30, 'dumbo', 'gumbo') -> 'gumbo'
  • iif(month(toDate('2018-12-01')) == 12, 345.12, 102.67) -> 345.12

iifNull

iifNull(<value1> : any, [<value2> : any], ...) => any

Given two or more inputs, returns the first not null item. This function is equivalent to coalesce.

  • iifNull(10, 20) -> 10
  • iifNull(null, 20, 40) -> 20
  • iifNull('azure', 'data', 'factory') -> 'azure'
  • iifNull(null, 'data', 'factory') -> 'data'

in

in(<array of items> : array, <item to find> : any) => boolean

Checks if an item is in the array.

  • in([10, 20, 30], 10) -> true
  • in(['good', 'kid'], 'bad') -> false

initCap

initCap(<value1> : string) => string

Converts the first letter of every word to uppercase. Words are identified as separated by whitespace.

  • initCap('cool iceCREAM') -> 'Cool Icecream'

instr

instr(<string> : string, <substring to find> : string) => integer

Finds the position(1 based) of the substring within a string. 0 is returned if not found.

  • instr('dumbo', 'mbo') -> 3
  • instr('microsoft', 'o') -> 5
  • instr('good', 'bad') -> 0

intersect

intersect(<value1> : array, <value2> : array) => array

Returns an intersection set of distinct items from 2 arrays.

  • intersect([10, 20, 30], [20, 40]) => [20]

isBitSet

isBitSet (<value1> : array, <value2>:integer ) => boolean

Checks if a bit position is set in this bitset

  • isBitSet(toBitSet([10, 32, 98]), 10) => true

isBoolean

isBoolean(<value1>: string) => boolean

Checks if the string value is a boolean value according to the rules of toBoolean()

  • isBoolean('true') -> true
  • isBoolean('no') -> true
  • isBoolean('microsoft') -> false

isByte

isByte(<value1> : string) => boolean

Checks if the string value is a byte value given an optional format according to the rules of toByte()

  • isByte('123') -> true
  • isByte('chocolate') -> false

isDate

isDate (<value1> : string, [<format>: string]) => boolean

Checks if the input date string is a date using an optional input date format. Refer to Java's SimpleDateFormat for available formats. If the input date format is omitted, default format is yyyy-[M]M-[d]d. Accepted formats are [ yyyy, yyyy-[M]M, yyyy-[M]M-[d]d, yyyy-[M]M-[d]dT* ]

  • isDate('2012-8-18') -> true
  • isDate('12/18--234234' -> 'MM/dd/yyyy') -> false

isDecimal

isDecimal (<value1> : string) => boolean

Checks if the string value is a decimal value given an optional format according to the rules of toDecimal()

  • isDecimal('123.45') -> true
  • isDecimal('12/12/2000') -> false

isDelete

isDelete([<value1> : integer]) => boolean

Checks if the row is marked for delete. For transformations taking more than one input stream you can pass the (1-based) index of the stream. The stream index should be either 1 or 2 and the default value is 1.

  • isDelete()
  • isDelete(1)

isDistinct

isDistinct(<value1> : any , <value1> : any) => boolean

Finds if a column or set of columns is distinct. It doesn't count null as a distinct value

  • isDistinct(custId, custName) => boolean

isDouble

isDouble (<value1> : string, [<format>: string]) => boolean

Checks if the string value is a double value given an optional format according to the rules of toDouble()

  • isDouble('123') -> true
  • isDouble('$123.45' -> '$###.00') -> true
  • isDouble('icecream') -> false

isError

isError([<value1> : integer]) => boolean

Checks if the row is marked as error. For transformations taking more than one input stream you can pass the (1-based) index of the stream. The stream index should be either 1 or 2 and the default value is 1.

  • isError()
  • isError(1)

isFloat

isFloat (<value1> : string, [<format>: string]) => boolean

Checks if the string value is a float value given an optional format according to the rules of toFloat()

  • isFloat('123') -> true
  • isFloat('$123.45' -> '$###.00') -> true
  • isFloat('icecream') -> false

isIgnore

isIgnore([<value1> : integer]) => boolean

Checks if the row is marked to be ignored. For transformations taking more than one input stream you can pass the (1-based) index of the stream. The stream index should be either 1 or 2 and the default value is 1.

  • isIgnore()
  • isIgnore(1)

isInsert

isInsert([<value1> : integer]) => boolean

Checks if the row is marked for insert. For transformations taking more than one input stream you can pass the (1-based) index of the stream. The stream index should be either 1 or 2 and the default value is 1.

  • isInsert()
  • isInsert(1)

isInteger

isInteger (<value1> : string, [<format>: string]) => boolean

Checks if the string value is an integer value given an optional format according to the rules of toInteger()

  • isInteger('123') -> true
  • isInteger('$123' -> '$###') -> true
  • isInteger('microsoft') -> false

isLong

isLong (<value1> : string, [<format>: string]) => boolean

Checks if the string value is a long value given an optional format according to the rules of toLong()

  • isLong('123') -> true
  • isLong('$123' -> '$###') -> true
  • isLong('gunchus') -> false

isMatch

isMatch([<value1> : integer]) => boolean

Checks if the row is matched at lookup. For transformations taking more than one input stream you can pass the (1-based) index of the stream. The stream index should be either 1 or 2 and the default value is 1.

  • isMatch()
  • isMatch(1)

isNan

isNan (<value1> : integral) => boolean

Check if this isn't a number.

  • isNan(10.2) => false

isNull

isNull(<value1> : any) => boolean

Checks if the value is NULL.

  • isNull(NULL()) -> true
  • isNull('') -> false

isShort

isShort (<value1> : string, [<format>: string]) => boolean

Checks if the string value is a short value given an optional format according to the rules of toShort()

  • isShort('123') -> true
  • isShort('$123' -> '$###') -> true
  • isShort('microsoft') -> false

isTimestamp

isTimestamp (<value1> : string, [<format>: string]) => boolean

Checks if the input date string is a timestamp using an optional input timestamp format. Refer to Java's SimpleDateFormat for available formats. If the timestamp is omitted the default pattern yyyy-[M]M-[d]d hh:mm:ss[.f...] is used. You can pass an optional timezone in the form of 'GMT', 'PST', 'UTC', 'America/Cayman'. Timestamp supports up to millisecond accuracy with value of 999 Refer to Java's SimpleDateFormat for available formats.

  • isTimestamp('2016-12-31 00:12:00') -> true
  • isTimestamp('2016-12-31T00:12:00' -> 'yyyy-MM-dd\\'T\\'HH:mm:ss' -> 'PST') -> true
  • isTimestamp('2012-8222.18') -> false

isUpdate

isUpdate([<value1> : integer]) => boolean

Checks if the row is marked for update. For transformations taking more than one input stream you can pass the (1-based) index of the stream. The stream index should be either 1 or 2 and the default value is 1.

  • isUpdate()
  • isUpdate(1)

isUpsert

isUpsert([<value1> : integer]) => boolean

Checks if the row is marked for insert. For transformations taking more than one input stream you can pass the (1-based) index of the stream. The stream index should be either 1 or 2 and the default value is 1.

  • isUpsert()
  • isUpsert(1)

J

jaroWinkler

jaroWinkler(<value1> : string, <value2> : string) => double

Gets the JaroWinkler distance between two strings.

  • jaroWinkler('frog', 'frog') => 1.0

K

keyValues

keyValues(<value1> : array, <value2> : array) => map

Creates a map of key/values. The first parameter is an array of keys and second is the array of values. Both arrays should have equal length.

  • keyValues(['bojjus', 'appa'], ['gunchus', 'ammi']) => ['bojjus' -> 'gunchus', 'appa' -> 'ammi']

kurtosis

kurtosis(<value1> : number) => double

Gets the kurtosis of a column.

  • kurtosis(sales)

kurtosisIf

kurtosisIf(<value1> : boolean, <value2> : number) => double

Based on a criteria, gets the kurtosis of a column.

  • kurtosisIf(region == 'West', sales)

L

lag

lag(<value> : any, [<number of rows to look before> : number], [<default value> : any]) => any

Gets the value of the first parameter evaluated n rows before the current row. The second parameter is the number of rows to look back and the default value is 1. If there aren't as many rows a value of null is returned unless a default value is specified.

  • lag(amount, 2)
  • lag(amount, 2000, 100)

last

last(<value1> : any, [<value2> : boolean]) => any

Gets the last value of a column group. If the second parameter ignoreNulls is omitted, it's assumed false.

  • last(sales)
  • last(sales, false)

lastDayOfMonth

lastDayOfMonth(<value1> : datetime) => date

Gets the last date of the month given a date.

  • lastDayOfMonth(toDate('2009-01-12')) -> toDate('2009-01-31')

lead

lead(<value> : any, [<number of rows to look after> : number], [<default value> : any]) => any

Gets the value of the first parameter evaluated n rows after the current row. The second parameter is the number of rows to look forward and the default value is 1. If there aren't as many rows a value of null is returned unless a default value is specified.

  • lead(amount, 2)
  • lead(amount, 2000, 100)

least

least(<value1> : any, ...) => any

Comparison lesser than or equal operator. Same as <= operator.

  • least(10, 30, 15, 20) -> 10
  • least(toDate('2010-12-12'), toDate('2011-12-12'), toDate('2000-12-12')) -> toDate('2000-12-12')

left

left(<string to subset> : string, <number of characters> : integral) => string

Extracts a substring start at index 1 with number of characters. Same as SUBSTRING(str, 1, n).

  • left('bojjus', 2) -> 'bo'
  • left('bojjus', 20) -> 'bojjus'

length

length(<value1> : string) => integer

Returns the length of the string.

  • length('dumbo') -> 5

lesser

lesser(<value1> : any, <value2> : any) => boolean

Comparison less operator. Same as < operator.

  • lesser(12, 24) -> true
  • ('abcd' < 'abc') -> false
  • (toTimestamp('2019-02-03 05:19:28.871', 'yyyy-MM-dd HH:mm:ss.SSS') < toTimestamp('2019-02-05 08:21:34.890', 'yyyy-MM-dd HH:mm:ss.SSS')) -> true

lesserOrEqual

lesserOrEqual(<value1> : any, <value2> : any) => boolean

Comparison lesser than or equal operator. Same as <= operator.

  • lesserOrEqual(12, 12) -> true
  • ('dumbo' <= 'dum') -> false

levenshtein

levenshtein(<from string> : string, <to string> : string) => integer

Gets the levenshtein distance between two strings.

  • levenshtein('boys', 'girls') -> 4

like

like(<string> : string, <pattern match> : string) => boolean

The pattern is a string that is matched literally. The exceptions are the following special symbols: _ matches any one character in the input (similar to . in posix regular expressions) % matches zero or more characters in the input (similar to .* in posix regular expressions). The escape character is ''. If an escape character precedes a special symbol or another escape character, the following character is matched literally. It's invalid to escape any other character.

  • like('icecream', 'ice%') -> true

locate

locate(<substring to find> : string, <string> : string, [<from index - 1-based> : integral]) => integer

Finds the position(1 based) of the substring within a string starting a certain position. If the position is omitted, it's considered from the beginning of the string. 0 is returned if not found.

  • locate('mbo', 'dumbo') -> 3
  • locate('o', 'microsoft', 6) -> 7
  • locate('bad', 'good') -> 0

log

log(<value1> : number, [<value2> : number]) => double

Calculates log value. An optional base can be supplied else a Euler number if used.

  • log(100, 10) -> 2

log10

log10(<value1> : number) => double

Calculates log value based on 10 base.

  • log10(100) -> 2

lookup

lookup(key, key2, ...) => complex[]

Looks up the first row from the cached sink using the specified keys that match the keys from the cached sink.

  • cacheSink#lookup(movieId)

lower

lower(<value1> : string) => string

Lowercases a string.

  • lower('GunChus') -> 'gunchus'

lpad

lpad(<string to pad> : string, <final padded length> : integral, <padding> : string) => string

Left pads the string by the supplied padding until it is of a certain length. If the string is equal to or greater than the length, then it's trimmed to the length.

  • lpad('dumbo', 10, '-') -> '-----dumbo'
  • lpad('dumbo', 4, '-') -> 'dumb'

ltrim

ltrim(<string to trim> : string, [<trim characters> : string]) => string

Left trims a string of leading characters. If second parameter is unspecified, it trims whitespace. Else it trims any character specified in the second parameter.

  • ltrim(' dumbo ') -> 'dumbo '
  • ltrim('!--!du!mbo!', '-!') -> 'du!mbo!'

M

map

map(<value1> : array, <value2> : unaryfunction) => any

Maps each element of the array to a new element using the provided expression. Map expects a reference to one element in the expression function as #item.

  • map([1, 2, 3, 4], #item + 2) -> [3, 4, 5, 6]
  • map(['a', 'b', 'c', 'd'], #item + '_processed') -> ['a_processed', 'b_processed', 'c_processed', 'd_processed']

mapAssociation

mapAssociation(<value1> : map, <value2> : binaryFunction) => array

Transforms a map by associating the keys to new values. Returns an array. It takes a mapping function where you can address the item as #key and current value as #value.

  • mapAssociation(['bojjus' -> 'gunchus', 'appa' -> 'ammi'], @(key = #key, value = #value)) => [@(key = 'bojjus', value = 'gunchus'), @(key = 'appa', value = 'ammi')]

mapIf

mapIf (<value1> : array, <value2> : binaryfunction, <value3>: binaryFunction) => any

Conditionally maps an array to another array of same or smaller length. The values can be of any datatype including structTypes. It takes a mapping function where you can address the item in the array as #item and current index as #index. For deeply nested maps you can refer to the parent maps using the #item_[n](#item_1, #index_1...) notation.

  • mapIf([10, 20, 30], #item > 10, #item + 5) -> [25, 35]
  • mapIf(['icecream', 'cake', 'soda'], length(#item) > 4, upper(#item)) -> ['ICECREAM', 'CAKE']

mapIndex

mapIndex(<value1> : array, <value2> : binaryfunction) => any

Maps each element of the array to a new element using the provided expression. Map expects a reference to one element in the expression function as #item and a reference to the element index as #index.

  • mapIndex([1, 2, 3, 4], #item + 2 + #index) -> [4, 6, 8, 10]

mapLoop

mapLoop(<value1> : integer, <value2> : unaryfunction) => any

Loops through from 1 to length to create an array of that length. It takes a mapping function where you can address the index in the array as #index. For deeply nested maps you can refer to the parent maps using the #index_n(#index_1, #index_2...) notation.

  • mapLoop(3, #index * 10) -> [10, 20, 30]

max

max(<value1> : any) => any

Gets the maximum value of a column.

  • max(sales)

maxIf

maxIf(<value1> : boolean, <value2> : any) => any

Based on a criteria, gets the maximum value of a column.

  • maxIf(region == 'West', sales)

md5

md5(<value1> : any, ...) => string

Calculates the MD5 digest of set of column of varying primitive datatypes and returns a 32-character hex string. It can be used to calculate a fingerprint for a row.

  • md5(5, 'gunchus', 8.2, 'bojjus', true, toDate('2010-4-4')) -> '4ce8a880bd621a1ffad0bca905e1bc5a'

mean

mean(<value1> : number) => number

Gets the mean of values of a column. Same as AVG.

  • mean(sales)

meanIf

meanIf(<value1> : boolean, <value2> : number) => number

Based on a criteria gets the mean of values of a column. Same as avgIf.

  • meanIf(region == 'West', sales)

millisecond

millisecond(<value1> : timestamp, [<value2> : string]) => integer

Gets the millisecond value of a date. You can pass an optional timezone in the form of 'GMT', 'PST', 'UTC', 'America/Cayman'. The local timezone is used as the default. Refer to Java's SimpleDateFormat class for available formats. https://docs.oracle.com/javase/8/docs/api/java/text/SimpleDateFormat.html.

  • millisecond(toTimestamp('2009-07-30 12:58:59.871', 'yyyy-MM-dd HH:mm:ss.SSS')) -> 871

milliseconds

milliseconds(<value1> : integer) => long

Duration in milliseconds for number of milliseconds.

  • milliseconds(2) -> 2L

min

min(<value1> : any) => any

Gets the minimum value of a column.

  • min(sales)

minIf

minIf(<value1> : boolean, <value2> : any) => any

Based on a criteria, gets the minimum value of a column.

  • minIf(region == 'West', sales)

minus

minus(<value1> : any, <value2> : any) => any

Subtracts numbers. Subtract number of days from a date. Subtract duration from a timestamp. Subtract two timestamps to get difference in milliseconds. Same as the - operator.

  • minus(20, 10) -> 10
  • 20 - 10 -> 10
  • minus(toDate('2012-12-15'), 3) -> toDate('2012-12-12')
  • toDate('2012-12-15') - 3 -> toDate('2012-12-12')
  • toTimestamp('2019-02-03 05:19:28.871', 'yyyy-MM-dd HH:mm:ss.SSS') + (days(1) + hours(2) - seconds(10)) -> toTimestamp('2019-02-04 07:19:18.871', 'yyyy-MM-dd HH:mm:ss.SSS')
  • toTimestamp('2019-02-03 05:21:34.851', 'yyyy-MM-dd HH:mm:ss.SSS') - toTimestamp('2019-02-03 05:21:36.923', 'yyyy-MM-dd HH:mm:ss.SSS') -> -2072

minute

minute(<value1> : timestamp, [<value2> : string]) => integer

Gets the minute value of a timestamp. You can pass an optional timezone in the form of 'GMT', 'PST', 'UTC', 'America/Cayman'. The local timezone is used as the default. Refer to Java's SimpleDateFormat class for available formats. https://docs.oracle.com/javase/8/docs/api/java/text/SimpleDateFormat.html.

  • minute(toTimestamp('2009-07-30 12:58:59')) -> 58
  • minute(toTimestamp('2009-07-30 12:58:59'), 'PST') -> 58

minutes

minutes(<value1> : integer) => long

Duration in milliseconds for number of minutes.

  • minutes(2) -> 120000L

mlookup

mlookup(key, key2, ...) => complex[]

Looks up the all matching rows from the cached sink using the specified keys that match the keys from the cached sink.

  • cacheSink#mlookup(movieId)

mod

mod(<value1> : any, <value2> : any) => any

Modulus of pair of numbers. Same as the % operator.

  • mod(20, 8) -> 4
  • 20 % 8 -> 4

month

month(<value1> : datetime) => integer

Gets the month value of a date or timestamp.

  • month(toDate('2012-8-8')) -> 8

monthsBetween

monthsBetween(<from date/timestamp> : datetime, <to date/timestamp> : datetime, [<roundoff> : boolean], [<time zone> : string]) => double

Gets the number of months between two dates. You can round off the calculation. You can pass an optional timezone in the form of 'GMT', 'PST', 'UTC', 'America/Cayman'. The local timezone is used as the default. Refer to Java's SimpleDateFormat class for available formats. https://docs.oracle.com/javase/8/docs/api/java/text/SimpleDateFormat.html.

  • monthsBetween(toTimestamp('1997-02-28 10:30:00'), toDate('1996-10-30')) -> 3.94959677

multiply

multiply(<value1> : any, <value2> : any) => any

Multiplies pair of numbers. Same as the * operator.

  • multiply(20, 10) -> 200
  • 20 * 10 -> 200

N

negate

negate(<value1> : number) => number

Negates a number. Turns positive numbers to negative and vice versa.

  • negate(13) -> -13

nextSequence

nextSequence() => long

Returns the next unique sequence. The number is consecutive only within a partition and is prefixed by the partitionId.

  • nextSequence() == 12313112 -> false

normalize

normalize(<String to normalize> : string) => string

Normalizes the string value to separate accented unicode characters.

  • regexReplace(normalize('bo²s'), `\p{M}`, '') -> 'boys'

not

not(<value1> : boolean) => boolean

Logical negation operator.

  • not(true) -> false
  • not(10 == 20) -> true

notEquals

notEquals(<value1> : any, <value2> : any) => boolean

Comparison not equals operator. Same as != operator.

  • 12 != 24 -> true
  • 'bojjus' != 'bo' + 'jjus' -> false

nTile

nTile([<value1> : integer]) => integer

The NTile function divides the rows for each window partition into n buckets ranging from 1 to at most n. Bucket values will differ by at most 1. If the number of rows in the partition doesn't divide evenly into the number of buckets, then the remainder values are distributed one per bucket, starting with the first bucket. The NTile function is useful for the calculation of tertiles, quartiles, deciles, and other common summary statistics. The function calculates two variables during initialization: The size of a regular bucket will have one extra row added to it. Both variables are based on the size of the current partition. During the calculation process the function keeps track of the current row number, the current bucket number, and the row number at which the bucket will change (bucketThreshold). When the current row number reaches bucket threshold, the bucket value is increased by one and the threshold is increased by the bucket size (plus one extra if the current bucket is padded).

  • nTile()
  • nTile(numOfBuckets)

null

null() => null

Returns a NULL value. Use the function syntax(null()) if there's a column named 'null'. Any operation that uses will result in a NULL.

  • isNull('dumbo' + null) -> true
  • isNull(10 * null) -> true
  • isNull('') -> false
  • isNull(10 + 20) -> false
  • isNull(10/0) -> true

O

or

or(<value1> : boolean, <value2> : boolean) => boolean

Logical OR operator. Same as ||.

  • or(true, false) -> true
  • true || false -> true

originColumns

originColumns(<streamName> : string) => any

Gets all output columns for an origin stream where columns were created. Must be enclosed in another function.

  • array(toString(originColumns('source1')))

output

output() => any

Returns the first row of the results of the cache sink

  • cacheSink#output()

outputs

output() => any

Returns the entire output row set of the results of the cache sink

  • cacheSink#outputs()

P

partitionId

partitionId() => integer

Returns the current partition ID the input row is in.

  • partitionId()

pMod

pMod(<value1> : any, <value2> : any) => any

Positive Modulus of pair of numbers.

  • pmod(-20, 8) -> 4

power

power(<value1> : number, <value2> : number) => double

Raises one number to the power of another.

  • power(10, 2) -> 100

R

radians

radians(<value1> : number) => double

Converts degrees to radians

  • radians(180) => 3.141592653589793

random

random(<value1> : integral) => long

Returns a random number given an optional seed within a partition. The seed should be a fixed value and is used with the partitionId to produce random values

  • random(1) == 1 -> false

rank

rank() => integer

Computes the rank of a value in a group of values specified in a window's order by clause. The result is one plus the number of rows preceding or equal to the current row in the ordering of the partition. The values will produce gaps in the sequence. Rank works even when data isn't sorted and looks for change in values.

  • rank()

reassociate

reassociate(<value1> : map, <value2> : binaryFunction) => map

Transforms a map by associating the keys to new values. It takes a mapping function where you can address the item as #key and current value as #value.

  • reassociate(['fruit' -> 'apple', 'vegetable' -> 'tomato'], substring(#key, 1, 1) + substring(#value, 1, 1)) => ['fruit' -> 'fa', 'vegetable' -> 'vt']

reduce

reduce(<value1> : array, <value2> : any, <value3> : binaryfunction, <value4> : unaryfunction) => any

Accumulates elements in an array. Reduce expects a reference to an accumulator and one element in the first expression function as #acc and #item and it expects the resulting value as #result to be used in the second expression function.

  • toString(reduce(['1', '2', '3', '4'], '0', #acc + #item, #result)) -> '01234'

regexExtract

regexExtract(<string> : string, <regex to find> : string, [<match group 1-based index> : integral]) => string

Extract a matching substring for a given regex pattern. The last parameter identifies the match group and is defaulted to 1 if omitted. Use <regex>(back quote) to match a string without escaping. Index 0 returns all matches. Without match groups, index 1 and above won’t return any result.

  • regexExtract('Cost is between 600 and 800 dollars', '(\\d+) and (\\d+)', 2) -> '800'
  • regexExtract('Cost is between 600 and 800 dollars', `(\d+) and (\d+)`, 2) -> '800'

regexMatch

regexMatch(<string> : string, <regex to match> : string) => boolean

Checks if the string matches the given regex pattern. Use <regex>(back quote) to match a string without escaping.

  • regexMatch('200.50', '(\\d+).(\\d+)') -> true
  • regexMatch('200.50', `(\d+).(\d+)`) -> true

regexReplace

regexReplace(<string> : string, <regex to find> : string, <substring to replace> : string) => string

Replace all occurrences of a regex pattern with another substring in the given string Use <regex>(back quote) to match a string without escaping.

  • regexReplace('100 and 200', '(\\d+)', 'bojjus') -> 'bojjus and bojjus'
  • regexReplace('100 and 200', `(\d+)`, 'gunchus') -> 'gunchus and gunchus'

regexSplit

regexSplit(<string to split> : string, <regex expression> : string) => array

Splits a string based on a delimiter based on regex and returns an array of strings.

  • regexSplit('bojjusAgunchusBdumbo', `[CAB]`) -> ['bojjus', 'gunchus', 'dumbo']
  • regexSplit('bojjusAgunchusBdumboC', `[CAB]`) -> ['bojjus', 'gunchus', 'dumbo', '']
  • (regexSplit('bojjusAgunchusBdumboC', `[CAB]`)[1]) -> 'bojjus'
  • isNull(regexSplit('bojjusAgunchusBdumboC', `[CAB]`)[20]) -> true

replace

replace(<string> : string, <substring to find> : string, [<substring to replace> : string]) => string

Replace all occurrences of a substring with another substring in the given string. If the last parameter is omitted, it's default to empty string.

  • replace('doggie dog', 'dog', 'cat') -> 'catgie cat'
  • replace('doggie dog', 'dog', '') -> 'gie '
  • replace('doggie dog', 'dog') -> 'gie '

reverse

reverse(<value1> : string) => string

Reverses a string.

  • reverse('gunchus') -> 'suhcnug'

right(<string to subset> : string, <number of characters> : integral) => string

Extracts a substring with number of characters from the right. Same as SUBSTRING(str, LENGTH(str) - n, n).

  • right('bojjus', 2) -> 'us'
  • right('bojjus', 20) -> 'bojjus'

rlike

rlike(<string> : string, <pattern match> : string) => boolean

Checks if the string matches the given regex pattern.

  • rlike('200.50', `(\d+).(\d+)`) -> true
  • rlike('bogus', `M[0-9]+.*`) -> false

round

round(<number> : number, [<scale to round> : number], [<rounding option> : integral]) => double

Rounds a number given an optional scale and an optional rounding mode. If the scale is omitted, it's defaulted to 0. If the mode is omitted, it's defaulted to ROUND_HALF_UP(5). The values for rounding include

  1. ROUND_UP - Rounding mode to round away from zero.
  2. ROUND_DOWN - Rounding mode to round towards zero.
  3. ROUND_CEILING - Rounding mode to round towards positive infinity. [Same as ROUND_UP if input is positive. If negative, behaves as ROUND_DOWN. Ex = -1.1 would be -1.0 with ROUND_CEILING and -2 with ROUND_UP]
  4. ROUND_FLOOR - Rounding mode to round towards negative infinity. [Same as ROUND_DOWN if input is positive. If negative, behaves as ROUND_UP]
  5. ROUND_HALF_UP - Rounding mode to round towards “nearest neighbor” unless both neighbors are equidistant, in which case ROUND_UP. [Most common + default for Dataflow].
  6. ROUND_HALF_DOWN - Rounding mode to round towards “nearest neighbor” unless both neighbors are equidistant, in which case ROUND_DOWN.
  7. ROUND_HALF_EVEN - Rounding mode to round towards the “nearest neighbor” unless both neighbors are equidistant, in which case, round towards the even neighbor.
  8. ROUND_UNNECESSARY - Rounding mode to assert that the round operation has an exact result, hence no rounding is necessary.
  • round(100.123) -> 100.0
  • round(2.5, 0) -> 3.0
  • round(5.3999999999999995, 2, 7) -> 5.40

rowNumber

rowNumber() => integer

Assigns a sequential row numbering for rows in a window starting with 1.

  • rowNumber()

rpad

rpad(<string to pad> : string, <final padded length> : integral, <padding> : string) => string

Right pads the string by the supplied padding until it is of a certain length. If the string is equal to or greater than the length, then it's trimmed to the length.

  • rpad('dumbo', 10, '-') -> 'dumbo-----'
  • rpad('dumbo', 4, '-') -> 'dumb'
  • rpad('dumbo', 8, '<>') -> 'dumbo<><'

rtrim

rtrim(<string to trim> : string, [<trim characters> : string]) => string

Right trims a string of trailing characters. If second parameter is unspecified, it trims whitespace. Else it trims any character specified in the second parameter.

  • rtrim(' dumbo ') -> ' dumbo'
  • rtrim('!--!du!mbo!', '-!') -> '!--!du!mbo'

S

second

second(<value1> : timestamp, [<value2> : string]) => integer

Gets the second value of a date. You can pass an optional timezone in the form of 'GMT', 'PST', 'UTC', 'America/Cayman'. The local timezone is used as the default. Refer to Java's SimpleDateFormat class for available formats. https://docs.oracle.com/javase/8/docs/api/java/text/SimpleDateFormat.html.

  • second(toTimestamp('2009-07-30 12:58:59')) -> 59

seconds

seconds(<value1> : integer) => long

Duration in milliseconds for number of seconds.

  • seconds(2) -> 2000L

setBitSet

setBitSet (<value1>: array, <value2>:array) => array

Sets bit positions in this bitset

  • setBitSet(toBitSet([10, 32]), [98]) => [4294968320L, 17179869184L]

sha1

sha1(<value1> : any, ...) => string

Calculates the SHA-1 digest of set of column of varying primitive datatypes and returns a 40-character hex string. It can be used to calculate a fingerprint for a row.

  • sha1(5, 'gunchus', 8.2, 'bojjus', true, toDate('2010-4-4')) -> '46d3b478e8ec4e1f3b453ac3d8e59d5854e282bb'

sha2

sha2(<value1> : integer, <value2> : any, ...) => string

Calculates the SHA-2 digest of set of column of varying primitive datatypes given a bit length, which can only be of values 0(256), 224, 256, 384, 512. It can be used to calculate a fingerprint for a row.

  • sha2(256, 'gunchus', 8.2, 'bojjus', true, toDate('2010-4-4')) -> 'afe8a553b1761c67d76f8c31ceef7f71b66a1ee6f4e6d3b5478bf68b47d06bd3'

sin

sin(<value1> : number) => double

Calculates a sine value.

  • sin(2) -> 0.9092974268256817

sinh

sinh(<value1> : number) => double

Calculates a hyperbolic sine value.

  • sinh(0) -> 0.0

size

size(<value1> : any) => integer

Finds the size of an array or map type

  • size(['element1', 'element2']) -> 2
  • size([1,2,3]) -> 3

skewness

skewness(<value1> : number) => double

Gets the skewness of a column.

  • skewness(sales)

skewnessIf

skewnessIf(<value1> : boolean, <value2> : number) => double

Based on a criteria, gets the skewness of a column.

  • skewnessIf(region == 'West', sales)

slice

slice(<array to slice> : array, <from 1-based index> : integral, [<number of items> : integral]) => array

Extracts a subset of an array from a position. Position is 1 based. If the length is omitted, it's defaulted to end of the string.

  • slice([10, 20, 30, 40], 1, 2) -> [10, 20]
  • slice([10, 20, 30, 40], 2) -> [20, 30, 40]
  • slice([10, 20, 30, 40], 2)[1] -> 20
  • isNull(slice([10, 20, 30, 40], 2)[0]) -> true
  • isNull(slice([10, 20, 30, 40], 2)[20]) -> true
  • slice(['a', 'b', 'c', 'd'], 8) -> []

sort

sort(<value1> : array, <value2> : binaryfunction) => array

Sorts the array using the provided predicate function. Sort expects a reference to two consecutive elements in the expression function as #item1 and #item2.

  • sort([4, 8, 2, 3], compare(#item1, #item2)) -> [2, 3, 4, 8]
  • sort(['a3', 'b2', 'c1'], iif(right(#item1, 1) >= right(#item2, 1), 1, -1)) -> ['c1', 'b2', 'a3']

soundex

soundex(<value1> : string) => string

Gets the soundex code for the string.

  • soundex('genius') -> 'G520'

split

split(<string to split> : string, <split characters> : string) => array

Splits a string based on a delimiter and returns an array of strings.

  • split('bojjus,guchus,dumbo', ',') -> ['bojjus', 'guchus', 'dumbo']
  • split('bojjus,guchus,dumbo', '|') -> ['bojjus,guchus,dumbo']
  • split('bojjus, guchus, dumbo', ', ') -> ['bojjus', 'guchus', 'dumbo']
  • split('bojjus, guchus, dumbo', ', ')[1] -> 'bojjus'
  • isNull(split('bojjus, guchus, dumbo', ', ')[0]) -> true
  • isNull(split('bojjus, guchus, dumbo', ', ')[20]) -> true
  • split('bojjusguchusdumbo', ',') -> ['bojjusguchusdumbo']

sqrt

sqrt(<value1> : number) => double

Calculates the square root of a number.

  • sqrt(9) -> 3

startsWith

startsWith(<string> : string, <substring to check> : string) => boolean

Checks if the string starts with the supplied string.

  • startsWith('dumbo', 'du') -> true

stddev

stddev(<value1> : number) => double

Gets the standard deviation of a column.

  • stdDev(sales)

stddevIf

stddevIf(<value1> : boolean, <value2> : number) => double

Based on a criteria, gets the standard deviation of a column.

  • stddevIf(region == 'West', sales)

stddevPopulation

stddevPopulation(<value1> : number) => double

Gets the population standard deviation of a column.

  • stddevPopulation(sales)

stddevPopulationIf

stddevPopulationIf(<value1> : boolean, <value2> : number) => double

Based on a criteria, gets the population standard deviation of a column.

  • stddevPopulationIf(region == 'West', sales)

stddevSample

stddevSample(<value1> : number) => double

Gets the sample standard deviation of a column.

  • stddevSample(sales)

stddevSampleIf

stddevSampleIf(<value1> : boolean, <value2> : number) => double

Based on a criteria, gets the sample standard deviation of a column.

  • stddevSampleIf(region == 'West', sales)

subDays

subDays(<date/timestamp> : datetime, <days to subtract> : integral) => datetime

Subtract days from a date or timestamp. Same as the - operator for date.

  • subDays(toDate('2016-08-08'), 1) -> toDate('2016-08-07')

subMonths

subMonths(<date/timestamp> : datetime, <months to subtract> : integral) => datetime

Subtract months from a date or timestamp.

  • subMonths(toDate('2016-09-30'), 1) -> toDate('2016-08-31')

substring

substring(<string to subset> : string, <from 1-based index> : integral, [<number of characters> : integral]) => string

Extracts a substring of a certain length from a position. Position is 1 based. If the length is omitted, it's defaulted to end of the string.

  • substring('Cat in the hat', 5, 2) -> 'in'
  • substring('Cat in the hat', 5, 100) -> 'in the hat'
  • substring('Cat in the hat', 5) -> 'in the hat'
  • substring('Cat in the hat', 100, 100) -> ''

substringIndex

substringIndex(<string to subset> : string, <delimiter> : string, <count of delimiter occurences> : integral]) => string

Extracts the substring before count occurrences of the delimiter. If count is positive, everything to the left of the final delimiter (counting from the left) is returned. If count is negative, everything to the right of the final delimiter (counting from the right) is returned.

  • substringIndex('111-222-333', '-', 1) -> '111'
  • substringIndex('111-222-333', '-', 2) -> '111-222'
  • substringIndex('111-222-333', '-', -1) -> '333'
  • substringIndex('111-222-333', '-', -2) -> '222-333'

sum

sum(<value1> : number) => number

Gets the aggregate sum of a numeric column.

  • sum(col)

sumDistinct

sumDistinct(<value1> : number) => number

Gets the aggregate sum of distinct values of a numeric column.

  • sumDistinct(col)

sumDistinctIf

sumDistinctIf(<value1> : boolean, <value2> : number) => number

Based on criteria gets the aggregate sum of a numeric column. The condition can be based on any column.

  • sumDistinctIf(state == 'CA' && commission < 10000, sales)
  • sumDistinctIf(true, sales)

sumIf

sumIf(<value1> : boolean, <value2> : number) => number

Based on criteria gets the aggregate sum of a numeric column. The condition can be based on any column.

  • sumIf(state == 'CA' && commission < 10000, sales)
  • sumIf(true, sales)

T

tan

tan(<value1> : number) => double

Calculates a tangent value.

  • tan(0) -> 0.0

tanh

tanh(<value1> : number) => double

Calculates a hyperbolic tangent value.

  • tanh(0) -> 0.0

toBase64

toBase64(<value1> : string, <encoding type> : string]) => string

Encodes the given string in base64. You can optionally pass the encoding type

  • toBase64('bojjus') -> 'Ym9qanVz'
  • toBase64('± 25000, € 5.000,- |', 'Windows-1252') -> 'sSAyNTAwMCwggCA1LjAwMCwtIHw='

toBinary

toBinary(<value1> : any) => binary

Converts any numeric/date/timestamp/string to binary representation.

  • toBinary(3) -> [0x11]

toBoolean

toBoolean(<value1> : string) => boolean

Converts a value of ('t', 'true', 'y', 'yes', '1') to true and ('f', 'false', 'n', 'no', '0') to false and NULL for any other value.

  • toBoolean('true') -> true
  • toBoolean('n') -> false
  • isNull(toBoolean('truthy')) -> true

toByte

toByte(<value> : any, [<format> : string], [<locale> : string]) => byte

Converts any numeric or string to a byte value. An optional Java decimal format can be used for the conversion.

  • toByte(123)
  • 123
  • toByte(0xFF)
  • -1
  • toByte('123')
  • 123

toDate

toDate(<string> : any, [<date format> : string]) => date

Converts input date string to date using an optional input date format. Refer to Java's SimpleDateFormat class for available formats. If the input date format is omitted, default format is yyyy-[M]M-[d]d. Accepted formats are :[ yyyy, yyyy-[M]M, yyyy-[M]M-[d]d, yyyy-[M]M-[d]dT* ].

  • toDate('2012-8-18') -> toDate('2012-08-18')
  • toDate('12/18/2012', 'MM/dd/yyyy') -> toDate('2012-12-18')

toDecimal

toDecimal(<value> : any, [<precision> : integral], [<scale> : integral], [<format> : string], [<locale> : string]) => decimal(10,0)

Converts any numeric or string to a decimal value. If precision and scale aren't specified, it's defaulted to (10,2). An optional Java decimal format can be used for the conversion. An optional locale format in the form of BCP47 language like en-US, de, zh-CN.

  • toDecimal(123.45) -> 123.45
  • toDecimal('123.45', 8, 4) -> 123.4500
  • toDecimal('$123.45', 8, 4,'$###.00') -> 123.4500
  • toDecimal('Ç123,45', 10, 2, 'Ç###,##', 'de') -> 123.45

toDouble

toDouble(<value> : any, [<format> : string], [<locale> : string]) => double

Converts any numeric or string to a double value. An optional Java decimal format can be used for the conversion. An optional locale format in the form of BCP47 language like en-US, de, zh-CN.

  • toDouble(123.45) -> 123.45
  • toDouble('123.45') -> 123.45
  • toDouble('$123.45', '$###.00') -> 123.45
  • toDouble('Ç123,45', 'Ç###,##', 'de') -> 123.45

toFloat

toFloat(<value> : any, [<format> : string], [<locale> : string]) => float

Converts any numeric or string to a float value. An optional Java decimal format can be used for the conversion. Truncates any double.

  • toFloat(123.45) -> 123.45f
  • toFloat('123.45') -> 123.45f
  • toFloat('$123.45', '$###.00') -> 123.45f

toInteger

toInteger(<value> : any, [<format> : string], [<locale> : string]) => integer

Converts any numeric or string to an integer value. An optional Java decimal format can be used for the conversion. Truncates any long, float, double.

  • toInteger(123) -> 123
  • toInteger('123') -> 123
  • toInteger('$123', '$###') -> 123

toLong

toLong(<value> : any, [<format> : string], [<locale> : string]) => long

Converts any numeric or string to a long value. An optional Java decimal format can be used for the conversion. Truncates any float, double.

  • toLong(123) -> 123
  • toLong('123') -> 123
  • toLong('$123', '$###') -> 123

topN

topN(<column/expression> : any, <count> : long, <n> : integer) => array

Gets the top N values for this column based on the count argument.

  • topN(custId, count, 5)
  • topN(productId, num_sales, 10)

toShort

toShort(<value> : any, [<format> : string], [<locale> : string]) => short

Converts any numeric or string to a short value. An optional Java decimal format can be used for the conversion. Truncates any integer, long, float, double.

  • toShort(123) -> 123
  • toShort('123') -> 123
  • toShort('$123', '$###') -> 123

toString

toString(<value> : any, [<number format/date format> : string], [<date locale> : string]) => string

Converts a primitive datatype to a string. For numbers and date a format can be specified. If unspecified the system default is picked.Java decimal format is used for numbers. Refer to Java SimpleDateFormat for all possible date formats; the default format is yyyy-MM-dd. For date or timestamp a locale can be optionally specified.

  • toString(10) -> '10'
  • toString('engineer') -> 'engineer'
  • toString(123456.789, '##,###.##') -> '123,456.79'
  • toString(123.78, '000000.000') -> '000123.780'
  • toString(12345, '##0.#####E0') -> '12.345E3'
  • toString(toDate('2018-12-31')) -> '2018-12-31'
  • isNull(toString(toDate('2018-12-31', 'MM/dd/yy'))) -> true
  • toString(4 == 20) -> 'false'
  • toString(toDate('12/31/18', 'MM/dd/yy', 'es-ES'), 'MM/dd/yy', 'de-DE')

toTimestamp

toTimestamp(<string> : any, [<timestamp format> : string], [<time zone> : string]) => timestamp

Converts a string to a timestamp given an optional timestamp format. If the timestamp is omitted the default pattern yyyy-[M]M-[d]d hh:mm:ss[.f...] is used. You can pass an optional timezone in the form of 'GMT', 'PST', 'UTC', 'America/Cayman'. Timestamp supports up to millisecond accuracy with value of 999. Refer to Java's SimpleDateFormat class for available formats. https://docs.oracle.com/javase/8/docs/api/java/text/SimpleDateFormat.html.

  • toTimestamp('2016-12-31 00:12:00') -> toTimestamp('2016-12-31 00:12:00')
  • toTimestamp('2016-12-31T00:12:00', 'yyyy-MM-dd\'T\'HH:mm:ss', 'PST') -> toTimestamp('2016-12-31 00:12:00')
  • toTimestamp('12/31/2016T00:12:00', 'MM/dd/yyyy\'T\'HH:mm:ss') -> toTimestamp('2016-12-31 00:12:00')
  • millisecond(toTimestamp('2019-02-03 05:19:28.871', 'yyyy-MM-dd HH:mm:ss.SSS')) -> 871

toUTC

toUTC(<value1> : timestamp, [<value2> : string]) => timestamp

Converts the timestamp to UTC. You can pass an optional timezone in the form of 'GMT', 'PST', 'UTC', 'America/Cayman'. It's defaulted to the current timezone. Refer to Java's SimpleDateFormat class for available formats. https://docs.oracle.com/javase/8/docs/api/java/text/SimpleDateFormat.html.

  • toUTC(currentTimestamp()) == toTimestamp('2050-12-12 19:18:12') -> false
  • toUTC(currentTimestamp(), 'Asia/Seoul') != toTimestamp('2050-12-12 19:18:12') -> true

translate

translate(<string to translate> : string, <lookup characters> : string, <replace characters> : string) => string

Replace one set of characters by another set of characters in the string. Characters have 1 to 1 replacement.

  • translate('(bojjus)', '()', '[]') -> '[bojjus]'
  • translate('(gunchus)', '()', '[') -> '[gunchus'

trim

trim(<string to trim> : string, [<trim characters> : string]) => string

Trims a string of leading and trailing characters. If second parameter is unspecified, it trims whitespace. Else it trims any character specified in the second parameter.

  • trim(' dumbo ') -> 'dumbo'
  • trim('!--!du!mbo!', '-!') -> 'dumbo'

true

true() => boolean

Always returns a true value. Use the function syntax(true()) if there's a column named 'true'.

  • (10 + 20 == 30) -> true
  • (10 + 20 == 30) -> true()

typeMatch

typeMatch(<type> : string, <base type> : string) => boolean

Matches the type of the column. Can only be used in pattern expressions.number matches short, integer, long, double, float or decimal, integral matches short, integer, long, fractional matches double, float, decimal and datetime matches date or timestamp type.

  • typeMatch(type, 'number')
  • typeMatch('date', 'datetime')

U

unescape

unescape(<string_to_escape> : string, <format> : string) => string

Unescapes a string according to a format. Literal values for acceptable format are 'json', 'xml', 'ecmascript', 'html', 'java'.

  • unescape('{\\\\\"value\\\\\": 10}', 'json')
  • '{\\\"value\\\": 10}'

unfold

unfold (<value1>: array) => any

Unfolds an array into a set of rows and repeats the values for the remaining columns in every row.

  • unfold(addresses) => any
  • unfold( @(name = salesPerson, sales = salesAmount) ) => any

unhex

unhex(<value1>: string) => binary

Unhexes a binary value from its string representation. This can be used with sha2, md5 to convert from string to binary representation

  • unhex('1fadbe') -> toBinary([toByte(0x1f), toByte(0xad), toByte(0xbe)])
  • unhex(md5(5, 'gunchus', 8.2, 'bojjus', true, toDate('2010-4-4'))) -> toBinary([toByte(0x4c),toByte(0xe8),toByte(0xa8),toByte(0x80),toByte(0xbd),toByte(0x62),toByte(0x1a),toByte(0x1f),toByte(0xfa),toByte(0xd0),toByte(0xbc),toByte(0xa9),toByte(0x05),toByte(0xe1),toByte(0xbc),toByte(0x5a)])

union

union(<value1>: array, <value2> : array) => array

Returns a union set of distinct items from 2 arrays.

  • union([10, 20, 30], [20, 40]) => [10, 20, 30, 40]

upper

upper(<value1> : string) => string

Uppercases a string.

  • upper('bojjus') -> 'BOJJUS'

uuid

uuid() => string

Returns the generated UUID.

  • uuid()

V

variance

variance(<value1> : number) => double

Gets the variance of a column.

  • variance(sales)

varianceIf

varianceIf(<value1> : boolean, <value2> : number) => double

Based on a criteria, gets the variance of a column.

  • varianceIf(region == 'West', sales)

variancePopulation

variancePopulation(<value1> : number) => double

Gets the population variance of a column.

  • variancePopulation(sales)

variancePopulationIf

variancePopulationIf(<value1> : boolean, <value2> : number) => double

Based on a criteria, gets the population variance of a column.

  • variancePopulationIf(region == 'West', sales)

varianceSample

varianceSample(<value1> : number) => double

Gets the unbiased variance of a column.

  • varianceSample(sales)

varianceSampleIf

varianceSampleIf(<value1> : boolean, <value2> : number) => double

Based on a criteria, gets the unbiased variance of a column.

  • varianceSampleIf(region == 'West', sales)

W

weekOfYear

weekOfYear(<value1> : datetime) => integer

Gets the week of the year given a date.

  • weekOfYear(toDate('2008-02-20')) -> 8

weeks

weeks(<value1> : integer) => long

Duration in milliseconds for number of weeks.

  • weeks(2) -> 1209600000L

X

xor

xor(<value1> : boolean, <value2> : boolean) => boolean

Logical XOR operator. Same as ^ operator.

  • xor(true, false) -> true
  • xor(true, true) -> false
  • true ^ false -> true

Y

year

year(<value1> : datetime) => integer

Gets the year value of a date.

  • year(toDate('2012-8-8')) -> 2012

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