From: | Eric Hanson <elhanson(at)gmail(dot)com> |
---|---|
To: | pgsql-general(at)postgresql(dot)org |
Subject: | express composite type literal as text |
Date: | 2015-02-22 18:07:52 |
Message-ID: | CACnWs=Xu-GtcksqVbt4gTMdMM8_4Wfhwno_70JNOPvXSbh9=2g@mail.gmail.com |
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Lists: | pgsql-bugs pgsql-general |
Hi,
How do I express a composite type literal as text?
I'm trying to use a composite type in a WHERE clause. The examples in the
docs
http://www.postgresql.org/docs/9.4/static/rowtypes.html
say:
CREATE TYPE complex AS (
r double precision,
i double precision
);
CREATE TYPE inventory_item AS (
name text,
supplier_id integer,
price numeric
);
CREATE TABLE on_hand (
item inventory_item,
count integer
);
INSERT INTO on_hand VALUES (ROW('fuzzy dice', 42, 1.99), 1000);
Now I want to query for that row, specifying the item in the WHERE clause.
I can't use the ROW() notation, because all values need to be represented
as text over a REST api. But I can't seem to get the text-based syntax to
work:
select * from on_hand where item='("fuzzy dice",42,1.99)';
yeilds
ERROR: input of anonymous composite types is not implemented
I've tried various forms of quote escaping and dollar quoting as the docs
suggest, but they all produce that same error:
select * from on_hand where item='(\\\"fuzzy dice\\\",42,1.99)';
select * from on_hand where item=$$("fuzzy dice",42,1.99)$$;
Thanks,
Eric
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