README

• infos = Information about the conditionals plugin is in keys below
• infos/author = Thomas Waser thoma.nosp@m.s.wa.nosp@m.ser@l.nosp@m.ibel.nosp@m.ektra.nosp@m..org
• infos/licence = BSD
• infos/needs =
• infos/provides =
• infos/placements = presetstorage
• infos/description =

This plugin uses if-then-else like conditions stored in the metakey check/condition to validate data.

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