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/*!
* Manifest lists
*/
use std::{
io::Read,
iter::{repeat, Map, Repeat, Zip},
};
use apache_avro::{types::Value as AvroValue, Reader as AvroReader, Schema as AvroSchema};
use serde::{Deserialize, Serialize};
use serde_bytes::ByteBuf;
use crate::error::Error;
use self::_serde::{FieldSummarySerde, ManifestListEntryV1, ManifestListEntryV2};
use super::{
manifest::Content,
table_metadata::{FormatVersion, TableMetadata},
types::Type,
values::Value,
};
/// Iterator of ManifestFileEntries
pub struct ManifestListReader<'a, 'metadata, R: Read> {
reader: Map<
Zip<AvroReader<'a, R>, Repeat<&'metadata TableMetadata>>,
fn(
(Result<AvroValue, apache_avro::Error>, &TableMetadata),
) -> Result<ManifestListEntry, Error>,
>,
}
impl<'a, 'metadata, R: Read> Iterator for ManifestListReader<'a, 'metadata, R> {
type Item = Result<ManifestListEntry, Error>;
fn next(&mut self) -> Option<Self::Item> {
self.reader.next()
}
}
impl<'a, 'metadata, R: Read> ManifestListReader<'a, 'metadata, R> {
/// Create a new ManifestFile reader
pub fn new(
reader: R,
table_metadata: &'metadata TableMetadata,
) -> Result<Self, apache_avro::Error> {
Ok(Self {
reader: AvroReader::new(reader)?
.zip(repeat(table_metadata))
.map(avro_value_to_manifest_file),
})
}
}
#[derive(Debug, Serialize, PartialEq, Eq, Clone)]
#[serde(into = "ManifestListEntryEnum")]
/// A manifest list includes summary metadata that can be used to avoid scanning all of the manifests in a snapshot when planning a table scan.
/// This includes the number of added, existing, and deleted files, and a summary of values for each field of the partition spec used to write the manifest.
pub struct ManifestListEntry {
/// Table format version
pub format_version: FormatVersion,
/// Location of the manifest file
pub manifest_path: String,
/// Length of the manifest file in bytes
pub manifest_length: i64,
/// ID of a partition spec used to write the manifest; must be listed in table metadata partition-specs
pub partition_spec_id: i32,
/// The type of files tracked by the manifest, either data or delete files; 0 for all v1 manifests
pub content: Content,
/// The sequence number when the manifest was added to the table; use 0 when reading v1 manifest lists
pub sequence_number: i64,
/// The minimum sequence number of all data or delete files in the manifest; use 0 when reading v1 manifest lists
pub min_sequence_number: i64,
/// ID of the snapshot where the manifest file was added
pub added_snapshot_id: i64,
/// Number of entries in the manifest that have status ADDED (1), when null this is assumed to be non-zero
pub added_files_count: Option<i32>,
/// Number of entries in the manifest that have status EXISTING (0), when null this is assumed to be non-zero
pub existing_files_count: Option<i32>,
/// Number of entries in the manifest that have status DELETED (2), when null this is assumed to be non-zero
pub deleted_files_count: Option<i32>,
/// Number of rows in all of files in the manifest that have status ADDED, when null this is assumed to be non-zero
pub added_rows_count: Option<i64>,
/// Number of rows in all of files in the manifest that have status EXISTING, when null this is assumed to be non-zero
pub existing_rows_count: Option<i64>,
/// Number of rows in all of files in the manifest that have status DELETED, when null this is assumed to be non-zero
pub deleted_rows_count: Option<i64>,
/// A list of field summaries for each partition field in the spec. Each field in the list corresponds to a field in the manifest file’s partition spec.
pub partitions: Option<Vec<FieldSummary>>,
/// Implementation-specific key metadata for encryption
pub key_metadata: Option<ByteBuf>,
}
/// Entry in manifest file.
#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone)]
#[serde(untagged)]
pub enum ManifestListEntryEnum {
/// Version 2 of the manifest file
V2(ManifestListEntryV2),
/// Version 1 of the manifest file
V1(ManifestListEntryV1),
}
#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone)]
#[serde(into = "FieldSummarySerde")]
/// DataFile found in Manifest.
pub struct FieldSummary {
/// Whether the manifest contains at least one partition with a null value for the field
pub contains_null: bool,
/// Whether the manifest contains at least one partition with a NaN value for the field
pub contains_nan: Option<bool>,
/// Lower bound for the non-null, non-NaN values in the partition field, or null if all values are null or NaN.
/// If -0.0 is a value of the partition field, the lower_bound must not be +0.0
pub lower_bound: Option<Value>,
/// Upper bound for the non-null, non-NaN values in the partition field, or null if all values are null or NaN .
/// If +0.0 is a value of the partition field, the upper_bound must not be -0.0.
pub upper_bound: Option<Value>,
}
mod _serde {
use crate::spec::table_metadata::FormatVersion;
use super::{Content, FieldSummary, ManifestListEntry, ManifestListEntryEnum};
use serde::{Deserialize, Serialize};
use serde_bytes::ByteBuf;
#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone)]
/// A manifest list includes summary metadata that can be used to avoid scanning all of the manifests in a snapshot when planning a table scan.
/// This includes the number of added, existing, and deleted files, and a summary of values for each field of the partition spec used to write the manifest.
pub struct ManifestListEntryV2 {
/// Location of the manifest file
pub manifest_path: String,
/// Length of the manifest file in bytes
pub manifest_length: i64,
/// ID of a partition spec used to write the manifest; must be listed in table metadata partition-specs
pub partition_spec_id: i32,
/// The type of files tracked by the manifest, either data or delete files; 0 for all v1 manifests
pub content: Content,
/// The sequence number when the manifest was added to the table; use 0 when reading v1 manifest lists
pub sequence_number: i64,
/// The minimum sequence number of all data or delete files in the manifest; use 0 when reading v1 manifest lists
pub min_sequence_number: i64,
/// ID of the snapshot where the manifest file was added
pub added_snapshot_id: i64,
/// Number of entries in the manifest that have status ADDED (1), when null this is assumed to be non-zero
pub added_files_count: i32,
/// Number of entries in the manifest that have status EXISTING (0), when null this is assumed to be non-zero
pub existing_files_count: i32,
/// Number of entries in the manifest that have status DELETED (2), when null this is assumed to be non-zero
pub deleted_files_count: i32,
/// Number of rows in all of files in the manifest that have status ADDED, when null this is assumed to be non-zero
pub added_rows_count: i64,
/// Number of rows in all of files in the manifest that have status EXISTING, when null this is assumed to be non-zero
pub existing_rows_count: i64,
/// Number of rows in all of files in the manifest that have status DELETED, when null this is assumed to be non-zero
pub deleted_rows_count: i64,
/// A list of field summaries for each partition field in the spec. Each field in the list corresponds to a field in the manifest file’s partition spec.
pub partitions: Option<Vec<FieldSummarySerde>>,
/// Implementation-specific key metadata for encryption
pub key_metadata: Option<ByteBuf>,
}
#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone)]
/// A manifest list includes summary metadata that can be used to avoid scanning all of the manifests in a snapshot when planning a table scan.
/// This includes the number of added, existing, and deleted files, and a summary of values for each field of the partition spec used to write the manifest.
pub struct ManifestListEntryV1 {
/// Location of the manifest file
pub manifest_path: String,
/// Length of the manifest file in bytes
pub manifest_length: i64,
/// ID of a partition spec used to write the manifest; must be listed in table metadata partition-specs
pub partition_spec_id: i32,
/// ID of the snapshot where the manifest file was added
pub added_snapshot_id: i64,
/// Number of entries in the manifest that have status ADDED (1), when null this is assumed to be non-zero
pub added_files_count: Option<i32>,
/// Number of entries in the manifest that have status EXISTING (0), when null this is assumed to be non-zero
pub existing_files_count: Option<i32>,
/// Number of entries in the manifest that have status DELETED (2), when null this is assumed to be non-zero
pub deleted_files_count: Option<i32>,
/// Number of rows in all of files in the manifest that have status ADDED, when null this is assumed to be non-zero
pub added_rows_count: Option<i64>,
/// Number of rows in all of files in the manifest that have status EXISTING, when null this is assumed to be non-zero
pub existing_rows_count: Option<i64>,
/// Number of rows in all of files in the manifest that have status DELETED, when null this is assumed to be non-zero
pub deleted_rows_count: Option<i64>,
/// A list of field summaries for each partition field in the spec. Each field in the list corresponds to a field in the manifest file’s partition spec.
pub partitions: Option<Vec<FieldSummarySerde>>,
/// Implementation-specific key metadata for encryption
pub key_metadata: Option<ByteBuf>,
}
impl From<ManifestListEntry> for ManifestListEntryEnum {
fn from(value: ManifestListEntry) -> Self {
match &value.format_version {
FormatVersion::V2 => ManifestListEntryEnum::V2(value.into()),
FormatVersion::V1 => ManifestListEntryEnum::V1(value.into()),
}
}
}
impl From<ManifestListEntry> for ManifestListEntryV1 {
fn from(value: ManifestListEntry) -> Self {
ManifestListEntryV1 {
manifest_path: value.manifest_path,
manifest_length: value.manifest_length,
partition_spec_id: value.partition_spec_id,
added_snapshot_id: value.added_snapshot_id,
added_files_count: value.added_files_count,
existing_files_count: value.existing_files_count,
deleted_files_count: value.deleted_files_count,
added_rows_count: value.added_rows_count,
existing_rows_count: value.existing_rows_count,
deleted_rows_count: value.deleted_rows_count,
partitions: value
.partitions
.map(|v| v.into_iter().map(Into::into).collect()),
key_metadata: value.key_metadata,
}
}
}
impl From<ManifestListEntry> for ManifestListEntryV2 {
fn from(value: ManifestListEntry) -> Self {
ManifestListEntryV2 {
manifest_path: value.manifest_path,
manifest_length: value.manifest_length,
partition_spec_id: value.partition_spec_id,
content: value.content,
sequence_number: value.sequence_number,
min_sequence_number: value.min_sequence_number,
added_snapshot_id: value.added_snapshot_id,
added_files_count: value.added_files_count.unwrap(),
existing_files_count: value.existing_files_count.unwrap(),
deleted_files_count: value.deleted_files_count.unwrap(),
added_rows_count: value.added_rows_count.unwrap(),
existing_rows_count: value.existing_rows_count.unwrap(),
deleted_rows_count: value.deleted_rows_count.unwrap(),
partitions: value
.partitions
.map(|v| v.into_iter().map(Into::into).collect()),
key_metadata: value.key_metadata,
}
}
}
#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone)]
/// DataFile found in Manifest.
pub struct FieldSummarySerde {
/// Whether the manifest contains at least one partition with a null value for the field
pub contains_null: bool,
/// Whether the manifest contains at least one partition with a NaN value for the field
pub contains_nan: Option<bool>,
/// Lower bound for the non-null, non-NaN values in the partition field, or null if all values are null or NaN.
/// If -0.0 is a value of the partition field, the lower_bound must not be +0.0
pub lower_bound: Option<ByteBuf>,
/// Upper bound for the non-null, non-NaN values in the partition field, or null if all values are null or NaN .
/// If +0.0 is a value of the partition field, the upper_bound must not be -0.0.
pub upper_bound: Option<ByteBuf>,
}
impl From<FieldSummary> for FieldSummarySerde {
fn from(value: FieldSummary) -> Self {
FieldSummarySerde {
contains_null: value.contains_null,
contains_nan: value.contains_nan,
lower_bound: value.lower_bound.map(Into::into),
upper_bound: value.upper_bound.map(Into::into),
}
}
}
}
impl ManifestListEntry {
pub fn try_from_enum(
entry: ManifestListEntryEnum,
table_metadata: &TableMetadata,
) -> Result<ManifestListEntry, Error> {
match entry {
ManifestListEntryEnum::V2(entry) => {
ManifestListEntry::try_from_v2(entry, table_metadata)
}
ManifestListEntryEnum::V1(entry) => {
ManifestListEntry::try_from_v1(entry, table_metadata)
}
}
}
pub(crate) fn try_from_v2(
entry: _serde::ManifestListEntryV2,
table_metadata: &TableMetadata,
) -> Result<ManifestListEntry, Error> {
let partition_types = table_metadata.default_partition_spec()?.data_types(
&table_metadata
.current_schema(None)
.or(table_metadata
.refs
.values()
.next()
.ok_or(Error::NotFound("Current".to_string(), "schema".to_string()))
.and_then(|x| table_metadata.schema(x.snapshot_id)))
.unwrap()
.fields,
)?;
Ok(ManifestListEntry {
format_version: FormatVersion::V2,
manifest_path: entry.manifest_path,
manifest_length: entry.manifest_length,
partition_spec_id: entry.partition_spec_id,
content: entry.content,
sequence_number: entry.sequence_number,
min_sequence_number: entry.min_sequence_number,
added_snapshot_id: entry.added_snapshot_id,
added_files_count: Some(entry.added_files_count),
existing_files_count: Some(entry.existing_files_count),
deleted_files_count: Some(entry.deleted_files_count),
added_rows_count: Some(entry.added_rows_count),
existing_rows_count: Some(entry.existing_rows_count),
deleted_rows_count: Some(entry.deleted_rows_count),
partitions: entry
.partitions
.map(|v| {
v.into_iter()
.zip(partition_types.iter())
.map(|(x, d)| FieldSummary::try_from(x, d))
.collect::<Result<Vec<_>, Error>>()
})
.transpose()?,
key_metadata: entry.key_metadata,
})
}
pub(crate) fn try_from_v1(
entry: _serde::ManifestListEntryV1,
table_metadata: &TableMetadata,
) -> Result<ManifestListEntry, Error> {
let partition_types = table_metadata.default_partition_spec()?.data_types(
&table_metadata
.current_schema(None)
.or(table_metadata
.refs
.values()
.next()
.ok_or(Error::NotFound("Current".to_string(), "schema".to_string()))
.and_then(|x| table_metadata.schema(x.snapshot_id)))
.unwrap()
.fields,
)?;
Ok(ManifestListEntry {
format_version: FormatVersion::V1,
manifest_path: entry.manifest_path,
manifest_length: entry.manifest_length,
partition_spec_id: entry.partition_spec_id,
content: Content::Data,
sequence_number: 0,
min_sequence_number: 0,
added_snapshot_id: entry.added_snapshot_id,
added_files_count: entry.added_files_count,
existing_files_count: entry.existing_files_count,
deleted_files_count: entry.deleted_files_count,
added_rows_count: entry.added_rows_count,
existing_rows_count: entry.existing_rows_count,
deleted_rows_count: entry.deleted_rows_count,
partitions: entry
.partitions
.map(|v| {
v.into_iter()
.zip(partition_types.iter())
.map(|(x, d)| FieldSummary::try_from(x, d))
.collect::<Result<Vec<_>, Error>>()
})
.transpose()?,
key_metadata: entry.key_metadata,
})
}
}
impl FieldSummary {
fn try_from(value: _serde::FieldSummarySerde, data_type: &Type) -> Result<Self, Error> {
Ok(FieldSummary {
contains_null: value.contains_null,
contains_nan: value.contains_nan,
lower_bound: value
.lower_bound
.map(|x| Value::try_from_bytes(&x, data_type))
.transpose()?,
upper_bound: value
.upper_bound
.map(|x| Value::try_from_bytes(&x, data_type))
.transpose()?,
})
}
}
impl ManifestListEntry {
/// Get schema of the manifest list
pub fn schema(format_version: &FormatVersion) -> Result<AvroSchema, Error> {
let schema = match format_version {
FormatVersion::V1 => r#"
{
"type": "record",
"name": "manifest_list",
"fields": [
{
"name": "manifest_path",
"type": "string",
"field_id": 500
},
{
"name": "manifest_length",
"type": "long",
"field_id": 501
},
{
"name": "partition_spec_id",
"type": "int",
"field_id": 502
},
{
"name": "added_snapshot_id",
"type": "long",
"field_id": 503
},
{
"name": "added_files_count",
"type": [
"null",
"int"
],
"default": null,
"field_id": 504
},
{
"name": "existing_files_count",
"type": [
"null",
"int"
],
"default": null,
"field_id": 505
},
{
"name": "deleted_files_count",
"type": [
"null",
"int"
],
"default": null,
"field_id": 506
},
{
"name": "added_rows_count",
"type": [
"null",
"long"
],
"default": null,
"field_id": 512
},
{
"name": "existing_rows_count",
"type": [
"null",
"long"
],
"default": null,
"field_id": 513
},
{
"name": "deleted_rows_count",
"type": [
"null",
"long"
],
"default": null,
"field_id": 514
},
{
"name": "partitions",
"type": [
"null",
{
"type": "array",
"items": {
"type": "record",
"name": "field_summary",
"fields": [
{
"name": "contains_null",
"type": "boolean",
"field_id": 509
},
{
"name": "contains_nan",
"type": [
"null",
"boolean"
],
"field_id": 518
},
{
"name": "lower_bound",
"type": [
"null",
"bytes"
],
"field_id": 510
},
{
"name": "upper_bound",
"type": [
"null",
"bytes"
],
"field_id": 511
}
]
},
"element-id": 112
}
],
"default": null,
"field_id": 507
},
{
"name": "key_metadata",
"type": [
"null",
"bytes"
],
"field_id": 519
}
]
}
"#
.to_owned(),
&FormatVersion::V2 => r#"
{
"type": "record",
"name": "manifest_list",
"fields": [
{
"name": "manifest_path",
"type": "string",
"field_id": 500
},
{
"name": "manifest_length",
"type": "long",
"field_id": 501
},
{
"name": "partition_spec_id",
"type": "int",
"field_id": 502
},
{
"name": "content",
"type": "int",
"field_id": 517
},
{
"name": "sequence_number",
"type": "long",
"field_id": 515
},
{
"name": "min_sequence_number",
"type": "long",
"field_id": 516
},
{
"name": "added_snapshot_id",
"type": "long",
"field_id": 503
},
{
"name": "added_files_count",
"type": "int",
"field_id": 504
},
{
"name": "existing_files_count",
"type": "int",
"field_id": 505
},
{
"name": "deleted_files_count",
"type": "int",
"field_id": 506
},
{
"name": "added_rows_count",
"type": "long",
"field_id": 512
},
{
"name": "existing_rows_count",
"type": "long",
"field_id": 513
},
{
"name": "deleted_rows_count",
"type": "long",
"field_id": 514
},
{
"name": "partitions",
"type": [
"null",
{
"type": "array",
"items": {
"type": "record",
"name": "field_summary",
"fields": [
{
"name": "contains_null",
"type": "boolean",
"field_id": 509
},
{
"name": "contains_nan",
"type": [
"null",
"boolean"
],
"field_id": 518
},
{
"name": "lower_bound",
"type": [
"null",
"bytes"
],
"field_id": 510
},
{
"name": "upper_bound",
"type": [
"null",
"bytes"
],
"field_id": 511
}
]
},
"element-id": 112
}
],
"default": null,
"field_id": 507
},
{
"name": "key_metadata",
"type": [
"null",
"bytes"
],
"field_id": 519
}
]
}
"#
.to_owned(),
};
AvroSchema::parse_str(&schema).map_err(Into::into)
}
}
/// Convert an avro value to a [ManifestFile] according to the provided format version
pub(crate) fn avro_value_to_manifest_file(
value: (Result<AvroValue, apache_avro::Error>, &TableMetadata),
) -> Result<ManifestListEntry, Error> {
let entry = value.0?;
let table_metadata = value.1;
match table_metadata.format_version {
FormatVersion::V1 => ManifestListEntry::try_from_v1(
apache_avro::from_value::<_serde::ManifestListEntryV1>(&entry)?,
table_metadata,
),
FormatVersion::V2 => ManifestListEntry::try_from_v2(
apache_avro::from_value::<_serde::ManifestListEntryV2>(&entry)?,
table_metadata,
),
}
}
#[cfg(test)]
mod tests {
use std::collections::HashMap;
use super::*;
use crate::spec::{
partition::{PartitionField, PartitionSpecBuilder, Transform},
schema::Schema,
table_metadata::TableMetadataBuilder,
types::{PrimitiveType, StructField, StructTypeBuilder},
};
#[test]
pub fn test_manifest_list_v2() {
let table_metadata = TableMetadataBuilder::default()
.location("/")
.current_schema_id(1)
.schemas(HashMap::from_iter(vec![(
1,
Schema {
schema_id: 1,
identifier_field_ids: None,
fields: StructTypeBuilder::default()
.with_struct_field(StructField {
id: 0,
name: "date".to_string(),
required: true,
field_type: Type::Primitive(PrimitiveType::Date),
doc: None,
})
.build()
.unwrap(),
},
)]))
.default_spec_id(1)
.partition_specs(HashMap::from_iter(vec![(
1,
PartitionSpecBuilder::default()
.spec_id(1)
.with_partition_field(PartitionField {
source_id: 0,
field_id: 1000,
name: "day".to_string(),
transform: Transform::Day,
})
.build()
.unwrap(),
)]))
.build()
.unwrap();
let manifest_file = ManifestListEntry {
format_version: FormatVersion::V2,
manifest_path: "".to_string(),
manifest_length: 1200,
partition_spec_id: 0,
content: Content::Data,
sequence_number: 566,
min_sequence_number: 0,
added_snapshot_id: 39487483032,
added_files_count: Some(1),
existing_files_count: Some(2),
deleted_files_count: Some(0),
added_rows_count: Some(1000),
existing_rows_count: Some(8000),
deleted_rows_count: Some(0),
partitions: Some(vec![FieldSummary {
contains_null: true,
contains_nan: Some(false),
lower_bound: Some(Value::Date(1234)),
upper_bound: Some(Value::Date(76890)),
}]),
key_metadata: None,
};
let schema = ManifestListEntry::schema(&FormatVersion::V2).unwrap();
let mut writer = apache_avro::Writer::new(&schema, Vec::new());
writer.append_ser(manifest_file.clone()).unwrap();
let encoded = writer.into_inner().unwrap();
let reader = apache_avro::Reader::new(&*encoded).unwrap();
for record in reader {
let result =
apache_avro::from_value::<_serde::ManifestListEntryV2>(&record.unwrap()).unwrap();
assert_eq!(
manifest_file,
ManifestListEntry::try_from_v2(result, &table_metadata).unwrap()
);
}
}
#[test]
pub fn test_manifest_list_v1() {
let table_metadata = TableMetadataBuilder::default()
.format_version(FormatVersion::V1)
.location("/")
.current_schema_id(1)
.schemas(HashMap::from_iter(vec![(
1,
Schema {
schema_id: 1,
identifier_field_ids: None,
fields: StructTypeBuilder::default()
.with_struct_field(StructField {
id: 0,
name: "date".to_string(),
required: true,
field_type: Type::Primitive(PrimitiveType::Date),
doc: None,
})
.build()
.unwrap(),
},
)]))
.default_spec_id(1)
.partition_specs(HashMap::from_iter(vec![(
1,
PartitionSpecBuilder::default()
.spec_id(1)
.with_partition_field(PartitionField {
source_id: 0,
field_id: 1000,
name: "day".to_string(),
transform: Transform::Day,
})
.build()
.unwrap(),
)]))
.build()
.unwrap();
let manifest_file = ManifestListEntry {
format_version: FormatVersion::V1,
manifest_path: "".to_string(),
manifest_length: 1200,
partition_spec_id: 0,
content: Content::Data,
sequence_number: 0,
min_sequence_number: 0,
added_snapshot_id: 39487483032,
added_files_count: Some(1),
existing_files_count: Some(2),
deleted_files_count: Some(0),
added_rows_count: Some(1000),
existing_rows_count: Some(8000),
deleted_rows_count: Some(0),
partitions: Some(vec![FieldSummary {
contains_null: true,
contains_nan: Some(false),
lower_bound: Some(Value::Date(1234)),
upper_bound: Some(Value::Date(76890)),
}]),
key_metadata: None,
};
let schema = ManifestListEntry::schema(&FormatVersion::V1).unwrap();
let mut writer = apache_avro::Writer::new(&schema, Vec::new());
writer.append_ser(manifest_file.clone()).unwrap();
let encoded = writer.into_inner().unwrap();
let reader = apache_avro::Reader::new(&*encoded).unwrap();
for record in reader {
let result =
apache_avro::from_value::<_serde::ManifestListEntryV1>(&record.unwrap()).unwrap();
assert_eq!(
manifest_file,
ManifestListEntry::try_from_v1(result, &table_metadata).unwrap()
);
}
}
}