On 09/24/2014 12:44 AM, Ilya I. Ashchepkov wrote:
I'm sorry about sending email several times. I haven't understand, was it sent by gmail or not. On Wed, Sep 24, 2014 at 2:30 PM, John R Pierce <pierce@xxxxxxxxxxxx <mailto:pierce@xxxxxxxxxxxx>> wrote: On 9/24/2014 12:23 AM, Ilya I. Ashchepkov wrote: Is spaces is necessary in text presentation of JSONB? In my data resulting text contains ~12% of spaces. can you show us an example of this? One record # select data from events.data limit 1; {"can": {"lls": {"1": 76.4}, "mhs": 4674.85, "rpm": 168.888, "speed": 74, "runned": 166855895, "fuel_consumption": 74213.5}, "crc": 10084, "gps": 1, "gsm": {"signal": 100}, "lls": {"1": 733, "2": 717}, "used": 19, "speed": 87.4, "valid": 1, "msg_id": 89, "runned": 72.75, "boot_no": 256, "digital": {"in": {"1": 1, "2": 0, "3": 0, "4": 0, "5": 0, "6": 0}, "out": {"1": 0, "2": 0}}, "visible": 20, "ignition": 1, "location": {"course": 265, "altitude": 143, "latitude": 55.127888997395836, "longitude": 80.8046142578125}, "protocol": 4, "coldstart": 1, "timesource": "terminal", "receiver_on": 1, "external_power": 28.07, "internal_power": 4.19} Whitespacis percents in this record: # select array_length(regexp_split_to_array(data::text, text ' '), 1)*100./length(data::text) from events.data limit 1; ?column? --------------------- 12.3417721518987342 Whitespace in test data # select count(*),avg(array_length(regexp_split_to_array(data::text, text ' '), 1)*100./length(data::text)) from events.data ; count | avg --------+--------------------- 242222 | 12.3649234646118312
The only thing I can of is to use json not jsonb. Modified example taken from docs:
http://www.postgresql.org/docs/9.4/static/datatype-json.html test=# SELECT '{"bar":"baz","balance":7.77,"active":false}'::jsonb; jsonb -------------------------------------------------- {"bar": "baz", "active": false, "balance": 7.77} test=# SELECT '{"bar":"baz","balance":7.77,"active":false}'::json; json --------------------------------------------- {"bar":"baz","balance":7.77,"active":false} json will return exactly what was put in. -- Adrian Klaver adrian.klaver@xxxxxxxxxxx -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
