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fix: parse var len of decimal for parquet statistic #837

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merged 3 commits into from
Jan 3, 2025
Merged

fix: parse var len of decimal for parquet statistic #837

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15b433c
fix parse var len of decimal for parquet statistic
Dec 24, 2024
34c134c
fix test
Jan 2, 2025
77a6cbe
reuse BigInt logic to decode
Jan 2, 2025
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9 changes: 8 additions & 1 deletion crates/iceberg/src/arrow/schema.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,7 @@ use arrow_array::{
};
use arrow_schema::{DataType, Field, Fields, Schema as ArrowSchema, TimeUnit};
use bitvec::macros::internal::funty::Fundamental;
use num_bigint::BigInt;
use parquet::arrow::PARQUET_FIELD_ID_META_KEY;
use parquet::file::statistics::Statistics;
use rust_decimal::prelude::ToPrimitive;
Expand Down Expand Up @@ -739,9 +740,15 @@ macro_rules! get_parquet_stat_as_datum {
let Some(bytes) = stats.[<$limit_type _bytes_opt>]() else {
return Ok(None);
};
let unscaled_value = BigInt::from_signed_bytes_be(bytes);
Some(Datum::new(
primitive_type.clone(),
PrimitiveLiteral::Int128(i128::from_be_bytes(bytes.try_into()?)),
PrimitiveLiteral::Int128(unscaled_value.to_i128().ok_or_else(|| {
Error::new(
ErrorKind::DataInvalid,
format!("Can't convert bytes to i128: {:?}", bytes),
)
})?),
))
}
(
Expand Down
246 changes: 245 additions & 1 deletion crates/iceberg/src/writer/file_writer/parquet_writer.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -478,15 +478,18 @@ mod tests {
use anyhow::Result;
use arrow_array::types::Int64Type;
use arrow_array::{
Array, ArrayRef, BooleanArray, Int32Array, Int64Array, ListArray, RecordBatch, StructArray,
Array, ArrayRef, BooleanArray, Decimal128Array, Int32Array, Int64Array, ListArray,
RecordBatch, StructArray,
};
use arrow_schema::{DataType, SchemaRef as ArrowSchemaRef};
use arrow_select::concat::concat_batches;
use parquet::arrow::PARQUET_FIELD_ID_META_KEY;
use rust_decimal::Decimal;
use tempfile::TempDir;
use uuid::Uuid;

use super::*;
use crate::arrow::schema_to_arrow_schema;
use crate::io::FileIOBuilder;
use crate::spec::{PrimitiveLiteral, Struct, *};
use crate::writer::file_writer::location_generator::test::MockLocationGenerator;
Expand Down Expand Up @@ -1169,4 +1172,245 @@ mod tests {

Ok(())
}

#[tokio::test]
async fn test_decimal_bound() -> Result<()> {
let temp_dir = TempDir::new().unwrap();
let file_io = FileIOBuilder::new_fs_io().build().unwrap();
let loccation_gen =
MockLocationGenerator::new(temp_dir.path().to_str().unwrap().to_string());
let file_name_gen =
DefaultFileNameGenerator::new("test".to_string(), None, DataFileFormat::Parquet);

// test 1.1 and 2.2
let schema = Arc::new(
Schema::builder()
.with_fields(vec![NestedField::optional(
0,
"decimal",
Type::Primitive(PrimitiveType::Decimal {
precision: 28,
scale: 10,
}),
)
.into()])
.build()
.unwrap(),
);
let arrow_schema: ArrowSchemaRef = Arc::new(schema_to_arrow_schema(&schema).unwrap());
let mut pw = ParquetWriterBuilder::new(
WriterProperties::builder().build(),
schema.clone(),
file_io.clone(),
loccation_gen.clone(),
file_name_gen.clone(),
)
.build()
.await?;
let col0 = Arc::new(
Decimal128Array::from(vec![Some(22000000000), Some(11000000000)])
.with_data_type(DataType::Decimal128(28, 10)),
) as ArrayRef;
let to_write = RecordBatch::try_new(arrow_schema.clone(), vec![col0]).unwrap();
pw.write(&to_write).await?;
let res = pw.close().await?;
assert_eq!(res.len(), 1);
let data_file = res
.into_iter()
.next()
.unwrap()
.content(crate::spec::DataContentType::Data)
.partition(Struct::empty())
.build()
.unwrap();
assert_eq!(
data_file.upper_bounds().get(&0),
Some(Datum::decimal_with_precision(Decimal::new(22000000000_i64, 10), 28).unwrap())
.as_ref()
);
assert_eq!(
data_file.lower_bounds().get(&0),
Some(Datum::decimal_with_precision(Decimal::new(11000000000_i64, 10), 28).unwrap())
.as_ref()
);

// test -1.1 and -2.2
let schema = Arc::new(
Schema::builder()
.with_fields(vec![NestedField::optional(
0,
"decimal",
Type::Primitive(PrimitiveType::Decimal {
precision: 28,
scale: 10,
}),
)
.into()])
.build()
.unwrap(),
);
let arrow_schema: ArrowSchemaRef = Arc::new(schema_to_arrow_schema(&schema).unwrap());
let mut pw = ParquetWriterBuilder::new(
WriterProperties::builder().build(),
schema.clone(),
file_io.clone(),
loccation_gen.clone(),
file_name_gen.clone(),
)
.build()
.await?;
let col0 = Arc::new(
Decimal128Array::from(vec![Some(-22000000000), Some(-11000000000)])
.with_data_type(DataType::Decimal128(28, 10)),
) as ArrayRef;
let to_write = RecordBatch::try_new(arrow_schema.clone(), vec![col0]).unwrap();
pw.write(&to_write).await?;
let res = pw.close().await?;
assert_eq!(res.len(), 1);
let data_file = res
.into_iter()
.next()
.unwrap()
.content(crate::spec::DataContentType::Data)
.partition(Struct::empty())
.build()
.unwrap();
assert_eq!(
data_file.upper_bounds().get(&0),
Some(Datum::decimal_with_precision(Decimal::new(-11000000000_i64, 10), 28).unwrap())
.as_ref()
);
assert_eq!(
data_file.lower_bounds().get(&0),
Some(Datum::decimal_with_precision(Decimal::new(-22000000000_i64, 10), 28).unwrap())
.as_ref()
);

// test max and min of rust_decimal
let decimal_max = Decimal::MAX;
let decimal_min = Decimal::MIN;
assert_eq!(decimal_max.scale(), decimal_min.scale());
let schema = Arc::new(
Schema::builder()
.with_fields(vec![NestedField::optional(
0,
"decimal",
Type::Primitive(PrimitiveType::Decimal {
precision: 38,
scale: decimal_max.scale(),
}),
)
.into()])
.build()
.unwrap(),
);
let arrow_schema: ArrowSchemaRef = Arc::new(schema_to_arrow_schema(&schema).unwrap());
let mut pw = ParquetWriterBuilder::new(
WriterProperties::builder().build(),
schema,
file_io.clone(),
loccation_gen,
file_name_gen,
)
.build()
.await?;
let col0 = Arc::new(
Decimal128Array::from(vec![
Some(decimal_max.mantissa()),
Some(decimal_min.mantissa()),
])
.with_data_type(DataType::Decimal128(38, 0)),
) as ArrayRef;
let to_write = RecordBatch::try_new(arrow_schema.clone(), vec![col0]).unwrap();
pw.write(&to_write).await?;
let res = pw.close().await?;
assert_eq!(res.len(), 1);
let data_file = res
.into_iter()
.next()
.unwrap()
.content(crate::spec::DataContentType::Data)
.partition(Struct::empty())
.build()
.unwrap();
assert_eq!(
data_file.upper_bounds().get(&0),
Some(Datum::decimal(decimal_max).unwrap()).as_ref()
);
assert_eq!(
data_file.lower_bounds().get(&0),
Some(Datum::decimal(decimal_min).unwrap()).as_ref()
);

// test max and min for scale 38
// # TODO
// Readd this case after resolve https://github.com/apache/iceberg-rust/issues/669
// let schema = Arc::new(
// Schema::builder()
// .with_fields(vec![NestedField::optional(
// 0,
// "decimal",
// Type::Primitive(PrimitiveType::Decimal {
// precision: 38,
// scale: 0,
// }),
// )
// .into()])
// .build()
// .unwrap(),
// );
// let arrow_schema: ArrowSchemaRef = Arc::new(schema_to_arrow_schema(&schema).unwrap());
// let mut pw = ParquetWriterBuilder::new(
// WriterProperties::builder().build(),
// schema,
// file_io.clone(),
// loccation_gen,
// file_name_gen,
// )
// .build()
// .await?;
// let col0 = Arc::new(
// Decimal128Array::from(vec![
// Some(99999999999999999999999999999999999999_i128),
// Some(-99999999999999999999999999999999999999_i128),
// ])
// .with_data_type(DataType::Decimal128(38, 0)),
// ) as ArrayRef;
// let to_write = RecordBatch::try_new(arrow_schema.clone(), vec![col0]).unwrap();
// pw.write(&to_write).await?;
// let res = pw.close().await?;
// assert_eq!(res.len(), 1);
// let data_file = res
// .into_iter()
// .next()
// .unwrap()
// .content(crate::spec::DataContentType::Data)
// .partition(Struct::empty())
// .build()
// .unwrap();
// assert_eq!(
// data_file.upper_bounds().get(&0),
// Some(Datum::new(
// PrimitiveType::Decimal {
// precision: 38,
// scale: 0
// },
// PrimitiveLiteral::Int128(99999999999999999999999999999999999999_i128)
// ))
// .as_ref()
// );
// assert_eq!(
// data_file.lower_bounds().get(&0),
// Some(Datum::new(
// PrimitiveType::Decimal {
// precision: 38,
// scale: 0
// },
// PrimitiveLiteral::Int128(-99999999999999999999999999999999999999_i128)
// ))
// .as_ref()
// );

Ok(())
}
}
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