Appending to an array[] feild...[ ltree ]

Hi ,

We are undergoing a data consolidation process wherein we are making a common
repository of business profiles from various sources.

I require to store label paths like 1.1.1 , 1.1.2,1.1.3 etc in a feild
and i use ltree[] for fast searching.

The problem is in the ltree[] feild in need to store uniq paths and need
want to know if some utility functions exists.

For example if {1.1.1,1.1.2,1.1.3} is contained in a ltree[] record and i encounter
a path say 1.1.4 i need to update it to {1.1.1,1.1.2,1.1.3,1.1.4} in other words
i need to insert to the ltree[] feild. Does there exists any generic function
(or ltree[] specific function) to add an item in the array? (first question)

My another question is is there any way to matain uniqueness in a ltree[] feild
for example , suppose i now encounter {1.1.1} again i do not want to
update the record to {1.1.1,1.1.2,1.1.3,1.1.4,1.1.1} to want it to remain the same
ie,{1.1.1,1.1.2,1.1.3,1.1.4} becoz 1.1.1 is already present in the [] , does there
exists any function to probe an ltree[] feild for existance ?

Regards
Mallah.

--
Rajesh Kumar Mallah,
Project Manager (Development)
Infocom Network Limited, New Delhi
phone: +91(11)6152172 (221) (L) ,9811255597 (M)

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