Logic

if

if(condition,yesValue,noValue)

Controls conditional branching.

For example if(1=2,'a','b') will get b

multi_if

multi_if(condition1, then1, condition2, then2.. ,else) An easier way to write if/self or case/when.

case_with_expression

case_with_expression(expression, condition1, value1, condition2, value2, ..., default_value)

Timeplus supports CASE WHEN .. THEN .. ELSE .. END operator. It is used to evaluate a series of conditions and return a value based on the first condition that evaluates to true.

Timeplus supports two forms:

• CASE WHEN .. THEN .. ELSE .. END
• CASE .. WHEN .. THEN .. ELSE .. END

For example:

-- common form in other SQL databases
SELECT number,
CASE
    WHEN number % 2 = 0 THEN number + 1
    WHEN number % 2 = 1 THEN number * 10
    ELSE number
END AS result
FROM ..

-- the other form is optimized for constant value
-- this will be translated to case_with_expression(number, 0, 100, 1, 200, 0)
SELECT number,
CASE number
    WHEN 0 THEN 100
    WHEN 1 THEN 200
    ELSE 0
END AS result
FROM ..

sleep

sleep(seconds)

Not necessary as a logic function, but it is a function that can be used to pause the execution for a specified number of seconds.

For example select sleep(2) will pause the execution for 2 seconds.