WillAyd commented on code in PR #683:
URL: https://github.com/apache/arrow-nanoarrow/pull/683#discussion_r1850481037


##########
src/nanoarrow/common/inline_types.h:
##########
@@ -916,13 +922,14 @@ static inline void ArrowDecimalInit(struct ArrowDecimal* 
decimal, int32_t bitwid
   memset(decimal->words, 0, sizeof(decimal->words));
   decimal->precision = precision;
   decimal->scale = scale;
+  // n_words will be 0 for bitwidth == 32

Review Comment:
   Arrow C++ still operates against 64 bit words with decimals right? Guessing 
the 32 bit implementation upstream still needs to be worked out?
   
   
https://github.com/apache/arrow/blob/cd3321b28b0c9703e5d7105d6146c1270bbadd7f/cpp/src/arrow/util/decimal.cc#L527



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