• abs
• acos
• asin
• atan
• ceil
• cos
• exp
• first
• floor
• format
• high
• is_nan
• is_null
• last
• length
• log
• log10
• low
• now
• pow
• sin
• sqrt
• strchar
• strftime
• substr
• tan

abs

Description

Get absolute value

Domain

Numeric -> double

Syntax

abs ( expression )

Example

./iquery -q "filter(matrix, abs(A) > 1)"

acos

Description

Calculate arc cosine

Domain

Numeric -> double

Syntax

acos ( expression )

Example

./iquery -q "apply(matrix, res, acos(A))"

asin

Description

Calculate arc sine

Domain

Numeric -> double

Syntax

asin ( expression )

Example

./iquery -q "apply(matrix, res, asin(A))"

atan

Description

Calculate arc tangent

Domain

Numeric -> double

Syntax

atan ( expression )

Example

./iquery -q "apply(matrix, res, atan(A))"

ceil

Description

Get smallest integer number greater or equal than specified

Domain

Numeric -> double

Syntax

ceil ( expression )

Example

./iquery -q "apply(matrix, res, ceil(A))"

strchar

Description

Get first char of the string. SciDB doesn't explicitly support char literal. 'x' is treated as string with length 1. If you need to use character in some query predicate, you should use char function to convert string to character.

Domain

String -> char

Syntax

strchar ( expression )

Example

./iquery -q "filter(Scan, Code=strchar('A'))"

strftime

Description

Print data according to specified format (see documantation of libc strftime function).

Domain

DateTime, String -> String

Syntax

strftime ( date, format )

Example

./iquery -q "apply(Products, expired, strftime(expiration_date, '%D'))"

substr

Description

Get substring of the string.

Domain

String, Integer, Integer -> String

Syntax

substr ( string, offset, length )

Example

./iquery -q "apply(Scan, ExpirationDate, subftime(Expired, '%D'))"

cos

Description

Calculate cosine

Domain

Numeric -> double

Syntax

cos ( expression )

Example

./iquery -q "apply(matrix, res, cos(A))"

exp

Description

Calculate exponent

Domain

Numeric -> double

Syntax

exp ( expression )

Example

./iquery -q "apply(matrix, res, exp(A))"

first

Description

Get first coordinate of specified dimension. If array has only one dimension, then dimension specifier can be omitted. Dimension is specified either by name, either by index (zero based poistion of dimension in array descriptor).

Domain

(string, string) -> integer

Syntax

first ( array-name [ , dimesnion-spec ] )

Example

./iquery -q "subarray(vec, first('vec') + 1, length('vec'))"

floor

Description

Get largest integer number smaller or equal than specified

Domain

Numeric -> double

Syntax

floor ( expression )

Example

./iquery -q "apply(matrix, res, floor(A))"

format

Description

Printf double value using sptring format string

Domain

(double, string) -> string

Syntax

format ( expression, format-string )

Example

./iquery -q "apply(matrix, fx, format(x, '%.20f'))"

high

Description

Get maximal coordinate for specified dimension. If array has only one dimension, then dimension specifier can be omitted. Dimension is specified either by name, either by index (zero based poistion of dimension in array descriptor).

Domain

(string, string) -> integer

Syntax

high ( array-name [ , dimesnion-spec ] )

Example

./iquery -q "subarray(vec, high('vec') - 1, high('vec'))"

is_null

Description

Check if expression value is null

Domain

(any) -> boolean

Syntax

is_null ( expression ] )

Example

./iquery -q "filter(vec, is_null(x))"

is_nan

Description

Check if double value is NAN

Domain

(double) -> boolean

Syntax

is_nan ( expression ] )

Example

./iquery -q "filter(vec, is_nan(x))"

last

Description

Get last coordinate of specified dimension. If array has only one dimension, then dimension specifier can be omitted. Dimension is specified either by name, either by index (zero based poistion of dimension in array descriptor).

Domain

(string, string) -> integer

Syntax

last ( array-name [ , dimesnion-spec ] )

Example

./iquery -q "subarray(vec, 1, last('vec') - 1)"

length

Description

Get length of sepcified dimension of the array. If array has only one dimension, then dimension specifier can be omitted. Dimension is specified either by name, either by index (zero based poistion of dimension in array descriptor).

Domain

(string, string) -> integer

Syntax

length ( array-name [ , dimesnion-spec ] )

Example

./iquery -q "subarray(vec, 1, length('vec'))"

log

Description

Calculate natural logarithm

Domain

Numeric -> double

Syntax

log ( expression )

Example

./iquery -q "apply(matrix, res, log(A))"

log10

Description

Calculate decimal logarithm

Domain

Numeric -> double

Syntax

log10 ( expression )

Example

./iquery -q "apply(matrix, res, log10(A))"

low

Description

Get minumum coordinate for specified dimension. If array has only one dimension, then dimension specifier can be omitted. Dimension is specified either by name, either by index (zero based poistion of dimension in array descriptor).

Domain

(string, string) -> integer

Syntax

low ( array-name [ , dimesnion-spec ] )

Example

./iquery -q "subarray(vec, low('vec') - 1, low('vec'))"

now

Description

Get current system time

Domain

None -> DateTime

Syntax

now ( )

Example

./iquery -q "filter(Product, Expired <= now())"

pow

Description

Raise number to the power

Domain

Numeric, Numeric -> double

Syntax

pow ( expression, expression )

Example

./iquery -q "apply(matrix, cube, pow(A, 3))"

sin

Description

Calculate sine

Domain

Numeric -> double

Syntax

sin ( expression )

Example

./iquery -q "apply(matrix, res, sin(A))"

sqrt

Description

Calculate square root

Domain

Numeric -> double

Syntax

sqrt ( expression )

Example

./iquery -q "apply(matrix, res, sqrt(A))"

tan

Description

Calculate tangent

Domain

Numeric -> double

Syntax

tan ( expression )

Example

./iquery -q "apply(matrix, res, tan(A))"