Re: JSONB spaces in text presentation

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(at)hogranch(dot)com> 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

>
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> john r pierce 37N 122W
> somewhere on the middle of the left coast
>
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--
С уважением,
Ащепков Илья koctep(at)gmail(dot)com