Syntax
(IF-condition) ? (THEN-condition) : (ELSE-condition) where the ELSE-condition is optional
Condition: Key Operation `('String' | '1234.56' | Key | '')`
Operations: !=, ==, <, <=, =>, >, :=, where:
- := is used to set a key value
- others are for comparison as in C
Example
`(this/key != 'value') ? (then/key == some/other/key) : (or/key <= '125')`
Meaning: IF this/key NOT EQUAL TO 'value' THEN then/key MUST EQUAL some/other/key ELSE or/key MUST BE LESS THAN 125
Another full example:
kdb mount conditionals.dump /tmount/conditionals conditionals dump kdb set user/tmount/conditionals/fkey 3.0 kdb set user/tmount/conditionals/hkey hello kdb setmeta user/tmount/conditionals/key check/condition "(hkey == 'hello') ? (fkey == '3.0')" # success kdb setmeta user/tmount/conditionals/key check/condition "(hkey == 'hello') ? (fkey == '5.0')" # fail