feat: Add support for Binary/LargeBinary/Utf8/LargeUtf8 data types in data page statistics
#11136
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Signed-off-by: Chojan Shang <psiace@apache.org>
Signed-off-by: Chojan Shang <psiace@apache.org>
Signed-off-by: Chojan Shang <psiace@apache.org>
alamb
approved these changes
Jun 27, 2024
| @@ -600,6 +600,18 @@ make_data_page_stats_iterator!( | |||
| Index::DOUBLE, | |||
| f64 | |||
| ); | |||
| make_data_page_stats_iterator!( | |||
| MinByteArrayDataPageStatsIterator, | |||
| |x: &PageIndex<ByteArray>| { x.min.clone() }, | |||
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I spent some time digging in the code and I found that this clone is cloning a Bytes (aka it is ref counted, and is not actually copying the bytes around)
| [<$stat_type_prefix ByteArrayDataPageStatsIterator>]::new($iterator).map(|x| { | ||
| x.into_iter().filter_map(|x| { | ||
| x.and_then(|x| { | ||
| let res = std::str::from_utf8(x.data()).map(|s| s.to_string()).ok(); |
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I played around with this code and was able to avoid the to_string() here but the code was more involved:
Some(DataType::Utf8) => {
let mut builder = StringBuilder::new();
let iterator = [<$stat_type_prefix ByteArrayDataPageStatsIterator>]::new($iterator);
for x in iterator {
for x in x.into_iter() {
let Some(x) = x else {
builder.append_null(); // no statistics value
continue;
};
let Ok(x) = std::str::from_utf8(x.data()) else {
log::debug!("Utf8 statistics is a non-UTF8 value, ignoring it.");
builder.append_null();
continue;
};
builder.append_value(x);
}
}
Ok(Arc::new(builder.finish()))
},I think this is a good one for now until we have a benchmark to optimize (aka #10934)
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findepi
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Jul 16, 2024
…types in data page statistics (apache#11136) * *: for binary Signed-off-by: Chojan Shang <psiace@apache.org> * *: for large binary Signed-off-by: Chojan Shang <psiace@apache.org> * feat: add utf8 and largeutf8 Signed-off-by: Chojan Shang <psiace@apache.org> --------- Signed-off-by: Chojan Shang <psiace@apache.org>
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Which issue does this PR close?
Part of #11026
Rationale for this change
What changes are included in this PR?
Are these changes tested?
Are there any user-facing changes?