prabhjyotsingh commented on a change in pull request #3425: [ZEPPELIN-4301] js
double precision loss problem
URL: https://github.com/apache/zeppelin/pull/3425#discussion_r327418103
##########
File path: zeppelin-web/src/app/tabledata/tabledata.js
##########
@@ -60,7 +60,7 @@ export default class TableData extends Dataset {
} else {
let valueOfCol;
if (!(col[0] === '0' || col[0] === '+' || col.length >
float64MaxDigits)) {
- if (!isNaN(valueOfCol = parseFloat(col)) && isFinite(col)) {
+ if (!isNaN(valueOfCol = col) && isFinite(col)) {
Review comment:
Will changing this (removing `parseFloat`) matter in this case? If I
understand it right, ideally it should not even come to this if.
Which makes me wonder what is `typeof col`, ideally that should be string,
and if it was a string and `col.length` in this case should have been 19, which
is greater than 16 (float64MaxDigits).
Also if it is not a string then that a limitation of JS itself, as this is
what I see on my browser console:
```
let col=6703273802681287331;
console.log(col);
6703273802681288000
```
Will try to repro this using JDBC interpreter, what I used to test is the
following paragraph:
```
%sh
echo -e "%table id\tage"
echo -e "6703273802681287331\t2"
```
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