Re: querying within json

On 30/10/2014 16:48, David G Johnston wrote:
>>> CREATE INDEX idxgin_numeric_prop ON atable USING
>>> gin((json_col->'numeric_prop'));
>> I can add the index, but no evidence of it being used when I run a query
>> like this:
>> select * from atable where (json_col->>'numeric_prop')::numeric < 100;
> The index is storing text while the expression has been cast to numeric so,
> no, if what is shown above is exactly what you did then you would not be
> using the index.

So I tried to create the index to make it a numeric index using a cast 
(won't show the failed details) but failed.
Any suggestions on how to do this?

Tim
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