GitHub user anuragknoldus opened a pull request:
https://github.com/apache/incubator-carbondata/pull/535
[CARBONDATA-542] Abnormal behaviour of Int datatype
**Analysis:** Currently Short and Int datatypes are treated as long and at
the time of storing in carbon data files delta compression is used which
compresses the data based on min and max values of the column.
While parsing the values for these datatypes, we use Double data type
parser and extract long value from that. Code snippet as below.
Double.valueOf(msrValue).longValue(). During Double parsing, the value
precision is lost. Integers greater than +9007199254740992 or less than
-9007199254740992 may not have an exact representation and the sparseness
increases exponentially as integers increase above the positive or decrease
below the negative values, respectively.
**Fix:** Parse the values based on their datatypes to avoid this problem
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/anuragknoldus/incubator-carbondata
CARBONDATA-542
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-carbondata/pull/535.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #535
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commit c940906a60a088894f91aa9cd793efd564966ed2
Author: Anurag <anu...@knoldus.com>
Date: 2017-01-13T11:38:55Z
manage parsing for integer value
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