# Numeric functions

Numeric functions return numeric values (integer, long, float, double, biginteger, bigdecimal). They generally take numeric values as inputs, though some take strings.

Function Definition Datatype constraint

+ - * /

Standard numeric operators

x in {integer, long, float, double, biginteger, bigdecimal}, return type is same as x [a]

ABS(x)

Absolute value of x

See standard numeric operators above

ACOS(x)

Arc cosine of x

x in {double, bigdecimal}, return type is double

ASIN(x)

Arc sine of x

x in {double, bigdecimal}, return type is double

ATAN(x)

Arc tangent of x

x in {double, bigdecimal}, return type is double

ATAN2(x,y)

Arc tangent of x and y

x, y in {double, bigdecimal}, return type is double

CEILING(x)

Ceiling of x

x in {double, float}, return type is double

COS(x)

Cosine of x

x in {double, bigdecimal}, return type is double

COT(x)

Cotangent of x

x in {double, bigdecimal}, return type is double

DEGREES(x)

x in {double, bigdecimal}, return type is double

EXP(x)

e^x

x in {double, float}, return type is double

FLOOR(x)

Floor of x

x in {double, float}, return type is double

FORMATBIGDECIMAL(x, y)

Formats x using format y

x is bigdecimal, y is string, returns string

FORMATBIGINTEGER(x, y)

Formats x using format y

x is biginteger, y is string, returns string

FORMATDOUBLE(x, y)

Formats x using format y

x is double, y is string, returns string

FORMATFLOAT(x, y)

Formats x using format y

x is float, y is string, returns string

FORMATINTEGER(x, y)

Formats x using format y

x is integer, y is string, returns string

FORMATLONG(x, y)

Formats x using format y

x is long, y is string, returns string

LOG(x)

Natural log of x (base e)

x in {double, float}, return type is double

LOG10(x)

Log of x (base 10)

x in {double, float}, return type is double

MOD(x, y)

Modulus (remainder of x / y)

x in {integer, long, float, double, biginteger, bigdecimal}, return type is same as x

PARSEBIGDECIMAL(x, y)

Parses x using format y

x, y are strings, returns bigdecimal

PARSEBIGINTEGER(x, y)

Parses x using format y

x, y are strings, returns biginteger

PARSEDOUBLE(x, y)

Parses x using format y

x, y are strings, returns double

PARSEFLOAT(x, y)

Parses x using format y

x, y are strings, returns float

PARSEINTEGER(x, y)

Parses x using format y

x, y are strings, returns integer

PARSELONG(x, y)

Parses x using format y

x, y are strings, returns long

PI()

Value of Pi

return is double

POWER(x,y)

x to the y power

x in {double, bigdecimal, biginteger}, return is the same type as x

x in {double, bigdecimal}, return type is double

RAND()

Returns a random number, using generator established so far in the query or initializing with system clock if necessary.

Returns double.

RAND(x)

Returns a random number, using new generator seeded with x. This should typically be called in an initialization query. It will only effect the random values returned by the Teiid RAND function and not the values from RAND functions evaluated by sources.

x is integer, returns double.

ROUND(x,y)

Round x to y places; negative values of y indicate places to the left of the decimal point

x in {integer, float, double, bigdecimal} y is integer, return is same type as x.

SIGN(x)

1 if x > 0, 0 if x = 0, -1 if x < 0

x in {integer, long, float, double, biginteger, bigdecimal}, return type is integer

SIN(x)

Sine value of x

x in {double, bigdecimal}, return type is double

SQRT(x)

Square root of x

x in {long, double, bigdecimal}, return type is double

TAN(x)

Tangent of x

x in {double, bigdecimal}, return type is double

BITAND(x, y)

Bitwise AND of x and y

x, y in {integer}, return type is integer

BITOR(x, y)

Bitwise OR of x and y

x, y in {integer}, return type is integer

BITXOR(x, y)

Bitwise XOR of x and y

x, y in {integer}, return type is integer

BITNOT(x)

Bitwise NOT of x

x in {integer}, return type is integer

[a] The precision and scale of non-bigdecimal arithmetic function functions results matches that of Java. The results of bigdecimal operations match Java, except for division, which uses a preferred scale of max(16, dividend.scale + divisor.precision + 1), which then has trailing zeros removed by setting the scale to max(dividend.scale, normalized scale).

Parsing numeric datatypes from strings

Teiid offers a set of functions you can use to parse numbers from strings. For each string, you need to provide the formatting of the string. These functions use the convention established by the java.text.DecimalFormat class to define the formats you can use with these functions. You can learn more about how this class defines numeric string formats by visiting the Sun Java Web site at the following URL for Sun Java.

For example, you could use these function calls, with the formatting string that adheres to the java.text.DecimalFormat convention, to parse strings and return the datatype you need:

Input String Function Call to Format String Output Value Output Datatype

'\$25.30'

parseDouble(cost, '\$,0.00;(\$,0.00)')

25.3

double

'25%'

parseFloat(percent, ',#0%')

25

float

'2,534.1'

parseFloat(total, ',0.;-,0.')

2534.1

float

'1.234E3'

parseLong(amt, '0.###E0')

1234

long

'1,234,567'

parseInteger(total, ',0;-,0')

1234567

integer

Formatting numeric datatypes as strings

Teiid offers a set of functions you can use to convert numeric datatypes into strings. For each string, you need to provide the formatting. These functions use the convention established within the java.text.DecimalFormat class to define the formats you can use with these functions. You can learn more about how this class defines numeric string formats by visiting the Sun Java Web site at the following URL for Sun Java .

For example, you could use these function calls, with the formatting string that adheres to the java.text.DecimalFormat convention, to format the numeric datatypes into strings:

Input Value Input Datatype Function Call to Format String Output String

25.3

double

formatDouble(cost, '\$,0.00;(\$,0.00)')

'\$25.30'

25

float

formatFloat(percent, ',#0%')

'25%'

2534.1

float

formatFloat(total, ',0.;-,0.')

'2,534.1'

1234

long

formatLong(amt, '0.###E0')

'1.234E3'

1234567

integer

formatInteger(total, ',0;-,0')

'1,234,567'