Hi, On Friday 03 April 2009 05:03:37 Tony Liao wrote: > now I want to insert default value [] to prefix column,because if the > prefix column is NULL,the returns are not I want (with prefix @>'text').I > alter column prefix default [],it return error: > ERROR: syntax error at or near "[" > LINE 2: ALTER COLUMN prefix SET DEFAULT [];
You need to have the value protected into quotes, as it's a literal:
dim=# create table tl(a prefix_range default '[]');
CREATE TABLE
dim=# \d tl
Table "public.tl"
Column | Type | Modifiers
--------+--------------+----------------------------
a | prefix_range | default '[]'::prefix_range
--
dim
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