viirya commented on code in PR #1767:
URL: https://github.com/apache/arrow-rs/pull/1767#discussion_r888650741
##########
arrow/src/array/data.rs:
##########
@@ -999,6 +999,27 @@ impl ArrayData {
pub fn validate_dictionary_offset(&self) -> Result<()> {
match &self.data_type {
+ DataType::Decimal(p, _) => {
+ let values_buffer = &self.buffers[0];
+
+ for pos in 0..values_buffer.len() {
+ let raw_val = unsafe {
+ std::slice::from_raw_parts(
+ values_buffer.as_ptr().add(pos),
+ 16_usize,
+ )
+ };
+ let as_array = raw_val.try_into();
+ match as_array {
+ Ok(v) if raw_val.len() == 16 => {
Review Comment:
`data` is private. :disappointed:
I simplified it as:
```rust
for pos in 0..values_buffer.len() {
let raw_val = unsafe {
std::slice::from_raw_parts(
values_buffer.as_ptr().add(pos),
16_usize,
)
};
let value = i128::from_le_bytes(raw_val.try_into().unwrap());
validate_decimal_precision(value, *p)?;
}
```
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