On 13/04/2016 11:53, Vitaly Burovoy wrote:
On 4/13/16, Vitaly Burovoy <vitaly.burovoy@xxxxxxxxx> wrote:
On 4/13/16, sighup <rts@xxxxxxxxx> wrote:
Hi, please excuse either my stupidity or naivety regarding this but I'm
a bit confused. Give the following basic table structure :
TABLE Data (
ID INT NOT NULL,
Markers jsonb NOT NULL
);
And the following data:
INSERT INTO Data (ID, Markers) VALUES(1, '[ {"idle": true, "items": 8,
"done": 0}, {"idle": true, "items": 8, "done": 0}]') ;
Prerequisite:
CREATE TYPE myrowtype AS (idle bool, items int, done int);
Couple examples:
How can I extract the value of the 'items' key either as two rows
SELECT (jsonb_populate_recordset(NULL::myrowtype, Markers)).items
FROM Data WHERE (ID = X);
and or a sum of both.
SELECT sum(items) FROM(
SELECT (jsonb_populate_recordset(NULL::myrowtype, Markers)).items
FROM Data WHERE (ID = X)
)AS t;
You should use a proper function "jsonb_populate_recordset" [1].
[1] http://www.postgresql.org/docs/9.5/static/functions-json.html
Hello Vitaly,
I have just tried this and of course it works, thank you ever so much
for your time and effort I genuinely appreciate it.
--
Bill
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