parthchandra commented on code in PR #682:
URL: https://github.com/apache/datafusion-comet/pull/682#discussion_r1683437858
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common/src/main/java/org/apache/comet/vector/CometVector.java:
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@@ -79,14 +79,23 @@ public Decimal getDecimal(int i, int precision, int scale) {
} else {
byte[] bytes = getBinaryDecimal(i);
BigInteger bigInteger = new BigInteger(bytes);
- BigDecimal javaDecimal = new BigDecimal(bigInteger, scale);
Review Comment:
This is only for precision > 18. `Decimal` internally keeps the value
either as BigDecimal or long. By assigning to BigInteger the Decimal
implementation will check if the value will fit in a long and if not then
convert to a BigDecimal. But we have already made the check to see if the value
will fit into a long so we can save that check by converting to BigDecimal
directly.
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