NarekDW opened a new pull request, #4074:
URL: https://github.com/apache/hive/pull/4074
### What changes were proposed in this pull request?
Add support for converting big numbers between different radixes, without an
overflow.
For example such a query:
```sql
SELECT
conv(9223372036854775807, 36, 16),
conv(9223372036854775807, 36, -16),
conv(-9223372036854775807, 36, 16),
conv(-9223372036854775807, 36, -16)
FROM src tablesample (1 rows);
```
Should give a correct result, like:
```
12DDAC15F246BAF8C0D551AC7 12DDAC15F246BAF8C0D551AC7
D2253EA0DB945073F2AAE539 -12DDAC15F246BAF8C0D551AC7
```
### Why are the changes needed?
Add support for converting big numbers between different radixes, without an
overflow.
### Does this PR introduce _any_ user-facing change?
Yes, it allows users to convert big numbers without an overflow among
different bases.
### How was this patch tested?
By existing unit tests.
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