JDBC escape syntax for fn keyword

You can specify functions in JDBC escape syntax, by using the fn keyword.

Syntax

{fn functionCall}

where functionCall is the name of one of the following scalar functions:

abs

Returns the absolute value of a number.

abs(NumericExpression)

The JDBC escape syntax {fn abs(NumericExpression)} is equivalent to the built-in syntax ABSOLUTE(NumericExpression). For more information, see the ABS or ABSVAL function.

acos

Returns the arc cosine of a specified number.

acos(number)

The JDBC escape syntax {fn acos(number)} is equivalent to the built-in syntax ACOS(number). For more information, see the ACOS function.

asin

Returns the arc sine of a specified number.

asin(number)

The JDBC escape syntax {fn asin(number)} is equivalent to the built-in syntax ASIN(number). For more information, see the ASIN function.

atan

Returns the arc tangent of a specified number.

atan(number)

The JDBC escape syntax {fn atan(number)} is equivalent to the built-in syntax ATAN(number). For more information, see the ATAN function.

ceiling

Rounds the specified number up, and returns the smallest number that is greater than or equal to the specified number.

ceiling(number)

The JDBC escape syntax {fn ceiling(number)} is equivalent to the built-in syntax CEILING(number). For more information, see the CEIL or CEILING function function.

concat

Returns the concatenation of character strings.

concat(CharacterExpression, CharacterExpression)

Character string formed by appending the second string to the first string. If either string is null, the result is NULL. The JDBC escape syntax {fn concat (CharacterExpression, CharacterExpression) is equivalent to the built-in syntax { CharacterExpression || CharacterExpression }. For more information, see the Concatenation function.

cos

Returns the cosine of a specified number.

cos(number)

The JDBC escape syntax {fn cos(number)} is equivalent to the built-in syntax COS(number). For more information, see the COS function function.

degrees

Converts a specified number from radians to degrees.

degrees(number)

The JDBC escape syntax {fn degrees(number)} is equivalent to the built-in syntax DEGREES(number). For more information, see the DEGREES function function.

exp

Returns e raised to the power of the specified number.

exp(number)

The JDBC escape syntax {fn exp(number)} is equivalent to the built-in syntax EXP(number). For more information, see the EXP function function.

floor

Rounds the specified number down, and returns the largest number that is less than or equal to the specified number.

floor(number)

The JDBC escape syntax {fn floor(number)} is equivalent to the built-in syntax FLOOR(number). For more information, see the FLOOR function function.

locate

Returns the position in the second CharacterExpression of the first occurrence of the first CharacterExpression. Searches from the beginning of the second CharacterExpression, unless the startIndex parameter is specified.

locate(CharacterExpression,CharacterExpression [, startIndex] )

The JDBC escape syntax {fn locate(CharacterExpression,CharacterExpression [, startIndex] )} is equivalent to the built-in syntax LOCATE(CharacterExpression, CharacterExpression [, StartPosition] ). For more information, see the LOCATE. function

log

Returns the natural logarithm (base e) of the specified number.

log(number) 

The JDBC escape syntax {fn log(number)} is equivalent to the built-in syntax LOG(number). For more information, see the LN or LOG function function.

log10

Returns the base-10 logarithm of the specified number.

log10(number)

The JDBC escape syntax {fn log10(number)} is equivalent to the built-in syntax LOG10(number). For more information, see the LOG10 function function.

mod

Returns the remainder (modulus) of argument 1 divided by argument 2. The result is negative only if argument 1 is negative.

mod(integer_type, integer_type)

For more information, see the MOD function.

pi

Returns a value that is closer than any other value to pi.

pi()

The JDBC escape syntax {fn pi()} is equivalent to the built-in syntax PI(). For more information, see the PI function function.

radians

Converts a specified number from degrees to radians.

radians(number)

The JDBC escape syntax {fn radians(number)} is equivalent to the built-in syntax RADIANS(number). For more information, see the RADIANS function function.

sin

Returns the sine of a specified number.

sin(number)

The JDBC escape syntax {fn sin(number)} is equivalent to the built-in syntax SIN(number). For more information, see the SIN function.

sqrt

Returns the square root of floating point number.

sqrt(FloatingPointExpression)

The JDBC escape syntax {fn sqrt (FloatingPointExpression)} is equivalent to the built-in syntax SQRT(FloatingPointExpression). For more information, see the SQRT function.

substring

Forms a character string by extracting length characters from the CharacterExpression beginning at startIndex. The index of the first character in the CharacterExpression is 1.

substring(CharacterExpression, startIndex, length)

tan

Returns the tangent of a specified number.

tan(number)

The JDBC escape syntax {fn tan(number)} is equivalent to the built-in syntax TAN(number). For more information, see the TAN function.

TIMESTAMPADD

Use the TIMESTAMPADD function to add the value of an interval to a timestamp. The function applies the integer to the specified timestamp based on the interval type and returns the sum as a new timestamp. You can subtract from the timestamp by using negative integers.

The TIMESTAMPADD is a JDBC escaped function, and is only accessible by using the JDBC escape function syntax.

TIMESTAMPADD( interval, integerExpression, timestampExpression )

To perform TIMESTAMPADD on dates and times, it is necessary to convert the dates and times to timestamps. Dates are converted to timestamps by putting 00:00:00.0 in the time-of-day fields. Times are converted to timestamps by putting the current date in the date fields.

You should not put a datetime column inside of a timestamp arithmetic function in WHERE clauses because the optimizer will not use any index on the column.

TIMESTAMPDIFF

Use the TIMESTAMPDIFF function to find the difference between two timestamp values at a specified interval. For example, the function can return the number of minutes between two specified timestamps.

The TIMESTAMPDIFF is a JDBC escaped function, and is only accessible by using the JDBC escape function syntax.

TIMESTAMPDIFF( interval, timestampExpression1, timestampExpression2 )

To perform TIMESTAMPDIFF on dates and times, it is necessary to convert the dates and times to timestamps. Dates are converted to timestamps by putting 00:00:00.0 in the time-of-day fields. Times are converted to timestamps by putting the current date in the date fields.

You should not put a datetime column inside of a timestamp arithmetic function in WHERE clauses because the optimizer will not use any index on the column.

Valid intervals for TIMESTAMPADD and TIMESTAMPDIFF

The TIMESTAMPADD and TIMESTAMPDIFF functions are used to perform arithmetic with timestamps. These two functions use the following valid intervals for arithmetic operations:

• SQL_TSI_DAY
• SQL_TSI_FRAC_SECOND
• SQL_TSI_HOUR
• SQL_TSI_MINUTE
• SQL_TSI_MONTH
• SQL_TSI_QUARTER
• SQL_TSI_SECOND
• SQL_TSI_WEEK
• SQL_TSI_YEAR

{fn TIMESTAMPADD( SQL_TSI_MONTH, 1, CURRENT_TIMESTAMP)}

{fn TIMESTAMPDIFF(SQL_TSI_WEEK, CURRENT_TIMESTAMP, 
  timestamp('2008-01-01-12.00.00.000000'))}