1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
//! Reading Iceberg manifest files
use crate::error::{Error, Result};
use crate::io::FileIO;
use apache_avro::types::Value;
use apache_avro::Reader as AvroReader;
/// Information about a data file discovered from manifests
#[derive(Debug, Clone)]
pub struct DataFileEntry {
/// Path to the data file
pub file_path: String,
/// Number of records in the file
pub record_count: i64,
/// Size of the file in bytes
pub file_size_in_bytes: i64,
/// File format (e.g., "PARQUET")
pub file_format: String,
}
/// Information about a manifest file entry in a manifest list
#[derive(Debug, Clone)]
pub struct ManifestFileInfo {
/// Path to the manifest file
pub manifest_path: String,
/// Size of the manifest file in bytes
pub manifest_length: i64,
/// Partition spec ID
pub partition_spec_id: i32,
/// Content type (0 = DATA, 1 = DELETES)
pub content: i32,
/// Sequence number
pub sequence_number: i64,
/// Minimum sequence number
pub min_sequence_number: i64,
/// Snapshot ID that added this manifest
pub added_snapshot_id: i64,
/// Number of files added
pub added_files_count: i32,
/// Number of existing files
pub existing_files_count: i32,
/// Number of deleted files
pub deleted_files_count: i32,
/// Number of rows added
pub added_rows_count: i64,
/// Number of existing rows
pub existing_rows_count: i64,
/// Number of deleted rows
pub deleted_rows_count: i64,
}
/// Reads manifest list files
pub struct ManifestListReader;
fn extract_int(value: &Value) -> Option<i32> {
match value {
Value::Int(n) => Some(*n),
Value::Union(_, boxed) => extract_int(boxed),
_ => None,
}
}
fn extract_long(value: &Value) -> Option<i64> {
match value {
Value::Long(n) => Some(*n),
Value::Union(_, boxed) => extract_long(boxed),
_ => None,
}
}
impl ManifestListReader {
/// Read a manifest list and return the paths to manifest files
pub async fn read(file_io: &FileIO, manifest_list_path: &str) -> Result<Vec<String>> {
let bytes = file_io.read(manifest_list_path).await?;
let reader = AvroReader::new(&bytes[..])
.map_err(|e| Error::invalid_input(format!("Failed to read manifest list: {}", e)))?;
let mut manifest_paths = Vec::new();
for value in reader {
let value = value.map_err(|e| {
Error::invalid_input(format!("Failed to parse manifest list entry: {}", e))
})?;
// Extract manifest_path from the Avro record
if let apache_avro::types::Value::Record(fields) = value {
for (name, field_value) in fields {
if name == "manifest_path" {
if let apache_avro::types::Value::String(path) = field_value {
manifest_paths.push(path);
}
}
}
}
}
Ok(manifest_paths)
}
/// Read a manifest list and return detailed manifest file information
pub async fn read_entries(
file_io: &FileIO,
manifest_list_path: &str,
) -> Result<Vec<ManifestFileInfo>> {
let bytes = file_io.read(manifest_list_path).await?;
let reader = AvroReader::new(&bytes[..])
.map_err(|e| Error::invalid_input(format!("Failed to read manifest list: {}", e)))?;
let mut entries = Vec::new();
for value in reader {
let value = value.map_err(|e| {
Error::invalid_input(format!("Failed to parse manifest list entry: {}", e))
})?;
if let Value::Record(fields) = value {
let mut info = ManifestFileInfo {
manifest_path: String::new(),
manifest_length: 0,
partition_spec_id: 0,
content: 0,
sequence_number: 0,
min_sequence_number: 0,
added_snapshot_id: 0,
added_files_count: 0,
existing_files_count: 0,
deleted_files_count: 0,
added_rows_count: 0,
existing_rows_count: 0,
deleted_rows_count: 0,
};
for (name, field_value) in fields {
match name.as_str() {
"manifest_path" => {
if let Value::String(s) = field_value {
info.manifest_path = s;
}
}
"manifest_length" => {
if let Value::Long(n) = field_value {
info.manifest_length = n;
}
}
"partition_spec_id" => {
if let Value::Int(n) = field_value {
info.partition_spec_id = n;
}
}
"content" => {
if let Value::Int(n) = field_value {
info.content = n;
}
}
"sequence_number" => {
if let Value::Long(n) = field_value {
info.sequence_number = n;
}
}
"min_sequence_number" => {
if let Value::Long(n) = field_value {
info.min_sequence_number = n;
}
}
"added_snapshot_id" => {
if let Value::Long(n) = field_value {
info.added_snapshot_id = n;
}
}
"added_files_count" => {
if let Some(n) = extract_int(&field_value) {
info.added_files_count = n;
}
}
"existing_files_count" => {
if let Some(n) = extract_int(&field_value) {
info.existing_files_count = n;
}
}
"deleted_files_count" => {
if let Some(n) = extract_int(&field_value) {
info.deleted_files_count = n;
}
}
"added_rows_count" => {
if let Some(n) = extract_long(&field_value) {
info.added_rows_count = n;
}
}
"existing_rows_count" => {
if let Some(n) = extract_long(&field_value) {
info.existing_rows_count = n;
}
}
"deleted_rows_count" => {
if let Some(n) = extract_long(&field_value) {
info.deleted_rows_count = n;
}
}
_ => {}
}
}
entries.push(info);
}
}
Ok(entries)
}
}
/// Reads manifest files
pub struct ManifestReader;
impl ManifestReader {
/// Read a manifest and return data file entries (excluding deleted files)
pub async fn read(file_io: &FileIO, manifest_path: &str) -> Result<Vec<DataFileEntry>> {
let bytes = file_io.read(manifest_path).await?;
let reader = AvroReader::new(&bytes[..])
.map_err(|e| Error::invalid_input(format!("Failed to read manifest: {}", e)))?;
let mut data_files = Vec::new();
for value in reader {
let value = value.map_err(|e| {
Error::invalid_input(format!("Failed to parse manifest entry: {}", e))
})?;
// Parse the manifest entry
if let apache_avro::types::Value::Record(fields) = value {
let mut status: Option<i32> = None;
let mut data_file_value: Option<apache_avro::types::Value> = None;
for (name, field_value) in fields {
match name.as_str() {
"status" => {
if let apache_avro::types::Value::Int(s) = field_value {
status = Some(s);
}
}
"data_file" => {
data_file_value = Some(field_value);
}
_ => {}
}
}
// Skip deleted entries (status = 2)
if let Some(s) = status {
if s == 2 {
continue;
}
}
// Parse data_file record
if let Some(apache_avro::types::Value::Record(data_file_fields)) = data_file_value {
let mut file_path: Option<String> = None;
let mut file_format: Option<String> = None;
let mut record_count: Option<i64> = None;
let mut file_size: Option<i64> = None;
for (name, field_value) in data_file_fields {
match name.as_str() {
"file_path" => {
if let apache_avro::types::Value::String(s) = field_value {
file_path = Some(s);
}
}
"file_format" => {
if let apache_avro::types::Value::String(s) = field_value {
file_format = Some(s);
}
}
"record_count" => {
if let apache_avro::types::Value::Long(n) = field_value {
record_count = Some(n);
}
}
"file_size_in_bytes" => {
if let apache_avro::types::Value::Long(n) = field_value {
file_size = Some(n);
}
}
_ => {}
}
}
if let (Some(path), Some(format), Some(count), Some(size)) =
(file_path, file_format, record_count, file_size)
{
data_files.push(DataFileEntry {
file_path: path,
file_format: format,
record_count: count,
file_size_in_bytes: size,
});
}
}
}
}
Ok(data_files)
}
}