iceberg/spec/
snapshot.rs

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16// under the License.
17
18/*!
19 * Snapshots
20 */
21use std::collections::HashMap;
22use std::sync::Arc;
23
24use chrono::{DateTime, Utc};
25use serde::{Deserialize, Serialize};
26use typed_builder::TypedBuilder;
27
28use super::table_metadata::SnapshotLog;
29use crate::error::{Result, timestamp_ms_to_utc};
30use crate::io::FileIO;
31use crate::spec::{ManifestList, SchemaId, SchemaRef, TableMetadata};
32use crate::{Error, ErrorKind};
33
34/// The ref name of the main branch of the table.
35pub const MAIN_BRANCH: &str = "main";
36/// Placeholder for snapshot ID. The field with this value must be replaced with the actual snapshot ID before it is committed.
37pub const UNASSIGNED_SNAPSHOT_ID: i64 = -1;
38
39/// Reference to [`Snapshot`].
40pub type SnapshotRef = Arc<Snapshot>;
41#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone)]
42#[serde(rename_all = "lowercase")]
43/// The operation field is used by some operations, like snapshot expiration, to skip processing certain snapshots.
44pub enum Operation {
45    /// Only data files were added and no files were removed.
46    Append,
47    /// Data and delete files were added and removed without changing table data;
48    /// i.e., compaction, changing the data file format, or relocating data files.
49    Replace,
50    /// Data and delete files were added and removed in a logical overwrite operation.
51    Overwrite,
52    /// Data files were removed and their contents logically deleted and/or delete files were added to delete rows.
53    Delete,
54}
55
56impl Operation {
57    /// Returns the string representation (lowercase) of the operation.
58    pub fn as_str(&self) -> &str {
59        match self {
60            Operation::Append => "append",
61            Operation::Replace => "replace",
62            Operation::Overwrite => "overwrite",
63            Operation::Delete => "delete",
64        }
65    }
66}
67
68#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone)]
69/// Summarises the changes in the snapshot.
70pub struct Summary {
71    /// The type of operation in the snapshot
72    pub operation: Operation,
73    /// Other summary data.
74    #[serde(flatten)]
75    pub additional_properties: HashMap<String, String>,
76}
77
78impl Default for Operation {
79    fn default() -> Operation {
80        Self::Append
81    }
82}
83
84#[derive(Debug, PartialEq, Eq, Clone)]
85/// Row range of a snapshot, contains first_row_id and added_rows_count.
86pub struct SnapshotRowRange {
87    /// The first _row_id assigned to the first row in the first data file in the first manifest.
88    pub first_row_id: u64,
89    /// The upper bound of the number of rows with assigned row IDs
90    pub added_rows: u64,
91}
92
93#[derive(Debug, PartialEq, Eq, Clone, TypedBuilder)]
94#[builder(field_defaults(setter(prefix = "with_")))]
95/// A snapshot represents the state of a table at some time and is used to access the complete set of data files in the table.
96pub struct Snapshot {
97    /// A unique long ID
98    pub(crate) snapshot_id: i64,
99    /// The snapshot ID of the snapshot’s parent.
100    /// Omitted for any snapshot with no parent
101    #[builder(default = None)]
102    pub(crate) parent_snapshot_id: Option<i64>,
103    /// A monotonically increasing long that tracks the order of
104    /// changes to a table.
105    pub(crate) sequence_number: i64,
106    /// A timestamp when the snapshot was created, used for garbage
107    /// collection and table inspection
108    pub(crate) timestamp_ms: i64,
109    /// The location of a manifest list for this snapshot that
110    /// tracks manifest files with additional metadata.
111    /// Currently we only support manifest list file, and manifest files are not supported.
112    #[builder(setter(into))]
113    pub(crate) manifest_list: String,
114    /// A string map that summarizes the snapshot changes, including operation.
115    pub(crate) summary: Summary,
116    /// ID of the table’s current schema when the snapshot was created.
117    #[builder(setter(strip_option(fallback = schema_id_opt)), default = None)]
118    pub(crate) schema_id: Option<SchemaId>,
119    /// Encryption Key ID
120    #[builder(default)]
121    pub(crate) encryption_key_id: Option<String>,
122    /// Row range of this snapshot, required when the table version supports row lineage.
123    /// Specify as a tuple of (first_row_id, added_rows_count)
124    #[builder(default, setter(!strip_option, transform = |first_row_id: u64, added_rows: u64| Some(SnapshotRowRange { first_row_id, added_rows })))]
125    // This is specified as a struct instead of two separate fields to ensure that both fields are either set or not set.
126    // The java implementations uses two separate fields, then sets `added_row_counts` to Null if `first_row_id` is set to Null.
127    // It throws an error if `added_row_counts` is set but `first_row_id` is not set, or if either of the two is negative.
128    // We handle all cases infallible using the rust type system.
129    pub(crate) row_range: Option<SnapshotRowRange>,
130}
131
132impl Snapshot {
133    /// Get the id of the snapshot
134    #[inline]
135    pub fn snapshot_id(&self) -> i64 {
136        self.snapshot_id
137    }
138
139    /// Get parent snapshot id.
140    #[inline]
141    pub fn parent_snapshot_id(&self) -> Option<i64> {
142        self.parent_snapshot_id
143    }
144
145    /// Get sequence_number of the snapshot. Is 0 for Iceberg V1 tables.
146    #[inline]
147    pub fn sequence_number(&self) -> i64 {
148        self.sequence_number
149    }
150    /// Get location of manifest_list file
151    #[inline]
152    pub fn manifest_list(&self) -> &str {
153        &self.manifest_list
154    }
155
156    /// Get summary of the snapshot
157    #[inline]
158    pub fn summary(&self) -> &Summary {
159        &self.summary
160    }
161    /// Get the timestamp of when the snapshot was created
162    #[inline]
163    pub fn timestamp(&self) -> Result<DateTime<Utc>> {
164        timestamp_ms_to_utc(self.timestamp_ms)
165    }
166
167    /// Get the timestamp of when the snapshot was created in milliseconds
168    #[inline]
169    pub fn timestamp_ms(&self) -> i64 {
170        self.timestamp_ms
171    }
172
173    /// Get the schema id of this snapshot.
174    #[inline]
175    pub fn schema_id(&self) -> Option<SchemaId> {
176        self.schema_id
177    }
178
179    /// Get the schema of this snapshot.
180    pub fn schema(&self, table_metadata: &TableMetadata) -> Result<SchemaRef> {
181        Ok(match self.schema_id() {
182            Some(schema_id) => table_metadata
183                .schema_by_id(schema_id)
184                .ok_or_else(|| {
185                    Error::new(
186                        ErrorKind::DataInvalid,
187                        format!("Schema with id {schema_id} not found"),
188                    )
189                })?
190                .clone(),
191            None => table_metadata.current_schema().clone(),
192        })
193    }
194
195    /// Get parent snapshot.
196    #[cfg(test)]
197    pub(crate) fn parent_snapshot(&self, table_metadata: &TableMetadata) -> Option<SnapshotRef> {
198        match self.parent_snapshot_id {
199            Some(id) => table_metadata.snapshot_by_id(id).cloned(),
200            None => None,
201        }
202    }
203
204    /// Load manifest list.
205    pub async fn load_manifest_list(
206        &self,
207        file_io: &FileIO,
208        table_metadata: &TableMetadata,
209    ) -> Result<ManifestList> {
210        let manifest_list_content = file_io.new_input(&self.manifest_list)?.read().await?;
211        ManifestList::parse_with_version(
212            &manifest_list_content,
213            // TODO: You don't really need the version since you could just project any Avro in
214            // the version that you'd like to get (probably always the latest)
215            table_metadata.format_version(),
216        )
217    }
218
219    #[allow(dead_code)]
220    pub(crate) fn log(&self) -> SnapshotLog {
221        SnapshotLog {
222            timestamp_ms: self.timestamp_ms,
223            snapshot_id: self.snapshot_id,
224        }
225    }
226
227    /// The row-id of the first newly added row in this snapshot. All rows added in this snapshot will
228    /// have a row-id assigned to them greater than this value. All rows with a row-id less than this
229    /// value were created in a snapshot that was added to the table (but not necessarily committed to
230    /// this branch) in the past.
231    ///
232    /// This field is optional but is required when the table version supports row lineage.
233    pub fn first_row_id(&self) -> Option<u64> {
234        self.row_range.as_ref().map(|r| r.first_row_id)
235    }
236
237    /// The total number of newly added rows in this snapshot. It should be the summation of {@link
238    /// ManifestFile#ADDED_ROWS_COUNT} for every manifest added in this snapshot.
239    ///
240    /// This field is optional but is required when the table version supports row lineage.
241    pub fn added_rows_count(&self) -> Option<u64> {
242        self.row_range.as_ref().map(|r| r.added_rows)
243    }
244
245    /// Returns the row range of this snapshot, if available.
246    /// This is a tuple containing (first_row_id, added_rows_count).
247    pub fn row_range(&self) -> Option<(u64, u64)> {
248        self.row_range
249            .as_ref()
250            .map(|r| (r.first_row_id, r.added_rows))
251    }
252
253    /// Get encryption key id, if available.
254    pub fn encryption_key_id(&self) -> Option<&str> {
255        self.encryption_key_id.as_deref()
256    }
257}
258
259pub(super) mod _serde {
260    /// This is a helper module that defines types to help with serialization/deserialization.
261    /// For deserialization the input first gets read into either the [SnapshotV1] or [SnapshotV2] struct
262    /// and then converted into the [Snapshot] struct. Serialization works the other way around.
263    /// [SnapshotV1] and [SnapshotV2] are internal struct that are only used for serialization and deserialization.
264    use std::collections::HashMap;
265
266    use serde::{Deserialize, Serialize};
267
268    use super::{Operation, Snapshot, Summary};
269    use crate::spec::SchemaId;
270    use crate::spec::snapshot::SnapshotRowRange;
271    use crate::{Error, ErrorKind};
272
273    #[derive(Debug, Serialize, Deserialize, PartialEq, Eq)]
274    #[serde(rename_all = "kebab-case")]
275    /// Defines the structure of a v2 snapshot for serialization/deserialization
276    pub(crate) struct SnapshotV3 {
277        pub snapshot_id: i64,
278        #[serde(skip_serializing_if = "Option::is_none")]
279        pub parent_snapshot_id: Option<i64>,
280        pub sequence_number: i64,
281        pub timestamp_ms: i64,
282        pub manifest_list: String,
283        pub summary: Summary,
284        #[serde(skip_serializing_if = "Option::is_none")]
285        pub schema_id: Option<SchemaId>,
286        pub first_row_id: u64,
287        pub added_rows: u64,
288        #[serde(skip_serializing_if = "Option::is_none")]
289        pub key_id: Option<String>,
290    }
291
292    #[derive(Debug, Serialize, Deserialize, PartialEq, Eq)]
293    #[serde(rename_all = "kebab-case")]
294    /// Defines the structure of a v2 snapshot for serialization/deserialization
295    pub(crate) struct SnapshotV2 {
296        pub snapshot_id: i64,
297        #[serde(skip_serializing_if = "Option::is_none")]
298        pub parent_snapshot_id: Option<i64>,
299        pub sequence_number: i64,
300        pub timestamp_ms: i64,
301        pub manifest_list: String,
302        pub summary: Summary,
303        #[serde(skip_serializing_if = "Option::is_none")]
304        pub schema_id: Option<SchemaId>,
305    }
306
307    #[derive(Debug, Serialize, Deserialize, PartialEq, Eq)]
308    #[serde(rename_all = "kebab-case")]
309    /// Defines the structure of a v1 snapshot for serialization/deserialization
310    pub(crate) struct SnapshotV1 {
311        pub snapshot_id: i64,
312        #[serde(skip_serializing_if = "Option::is_none")]
313        pub parent_snapshot_id: Option<i64>,
314        pub timestamp_ms: i64,
315        #[serde(skip_serializing_if = "Option::is_none")]
316        pub manifest_list: Option<String>,
317        #[serde(skip_serializing_if = "Option::is_none")]
318        pub manifests: Option<Vec<String>>,
319        #[serde(skip_serializing_if = "Option::is_none")]
320        pub summary: Option<Summary>,
321        #[serde(skip_serializing_if = "Option::is_none")]
322        pub schema_id: Option<SchemaId>,
323    }
324
325    impl From<SnapshotV3> for Snapshot {
326        fn from(s: SnapshotV3) -> Self {
327            Snapshot {
328                snapshot_id: s.snapshot_id,
329                parent_snapshot_id: s.parent_snapshot_id,
330                sequence_number: s.sequence_number,
331                timestamp_ms: s.timestamp_ms,
332                manifest_list: s.manifest_list,
333                summary: s.summary,
334                schema_id: s.schema_id,
335                encryption_key_id: s.key_id,
336                row_range: Some(SnapshotRowRange {
337                    first_row_id: s.first_row_id,
338                    added_rows: s.added_rows,
339                }),
340            }
341        }
342    }
343
344    impl TryFrom<Snapshot> for SnapshotV3 {
345        type Error = Error;
346
347        fn try_from(s: Snapshot) -> Result<Self, Self::Error> {
348            let row_range = s.row_range.ok_or_else(|| {
349                Error::new(
350                    crate::ErrorKind::DataInvalid,
351                    "v3 Snapshots must have first-row-id and rows-added fields set.".to_string(),
352                )
353            })?;
354
355            Ok(SnapshotV3 {
356                snapshot_id: s.snapshot_id,
357                parent_snapshot_id: s.parent_snapshot_id,
358                sequence_number: s.sequence_number,
359                timestamp_ms: s.timestamp_ms,
360                manifest_list: s.manifest_list,
361                summary: s.summary,
362                schema_id: s.schema_id,
363                first_row_id: row_range.first_row_id,
364                added_rows: row_range.added_rows,
365                key_id: s.encryption_key_id,
366            })
367        }
368    }
369
370    impl From<SnapshotV2> for Snapshot {
371        fn from(v2: SnapshotV2) -> Self {
372            Snapshot {
373                snapshot_id: v2.snapshot_id,
374                parent_snapshot_id: v2.parent_snapshot_id,
375                sequence_number: v2.sequence_number,
376                timestamp_ms: v2.timestamp_ms,
377                manifest_list: v2.manifest_list,
378                summary: v2.summary,
379                schema_id: v2.schema_id,
380                encryption_key_id: None,
381                row_range: None,
382            }
383        }
384    }
385
386    impl From<Snapshot> for SnapshotV2 {
387        fn from(v2: Snapshot) -> Self {
388            SnapshotV2 {
389                snapshot_id: v2.snapshot_id,
390                parent_snapshot_id: v2.parent_snapshot_id,
391                sequence_number: v2.sequence_number,
392                timestamp_ms: v2.timestamp_ms,
393                manifest_list: v2.manifest_list,
394                summary: v2.summary,
395                schema_id: v2.schema_id,
396            }
397        }
398    }
399
400    impl TryFrom<SnapshotV1> for Snapshot {
401        type Error = Error;
402
403        fn try_from(v1: SnapshotV1) -> Result<Self, Self::Error> {
404            Ok(Snapshot {
405                snapshot_id: v1.snapshot_id,
406                parent_snapshot_id: v1.parent_snapshot_id,
407                sequence_number: 0,
408                timestamp_ms: v1.timestamp_ms,
409                manifest_list: match (v1.manifest_list, v1.manifests) {
410                    (Some(file), None) => file,
411                    (Some(_), Some(_)) => {
412                        return Err(Error::new(
413                            ErrorKind::DataInvalid,
414                            "Invalid v1 snapshot, when manifest list provided, manifest files should be omitted",
415                        ));
416                    }
417                    (None, _) => {
418                        return Err(Error::new(
419                            ErrorKind::DataInvalid,
420                            "Unsupported v1 snapshot, only manifest list is supported",
421                        ));
422                    }
423                },
424                summary: v1.summary.unwrap_or(Summary {
425                    operation: Operation::default(),
426                    additional_properties: HashMap::new(),
427                }),
428                schema_id: v1.schema_id,
429                encryption_key_id: None,
430                row_range: None,
431            })
432        }
433    }
434
435    impl From<Snapshot> for SnapshotV1 {
436        fn from(v2: Snapshot) -> Self {
437            SnapshotV1 {
438                snapshot_id: v2.snapshot_id,
439                parent_snapshot_id: v2.parent_snapshot_id,
440                timestamp_ms: v2.timestamp_ms,
441                manifest_list: Some(v2.manifest_list),
442                summary: Some(v2.summary),
443                schema_id: v2.schema_id,
444                manifests: None,
445            }
446        }
447    }
448}
449
450#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone)]
451#[serde(rename_all = "kebab-case")]
452/// Iceberg tables keep track of branches and tags using snapshot references.
453pub struct SnapshotReference {
454    /// A reference’s snapshot ID. The tagged snapshot or latest snapshot of a branch.
455    pub snapshot_id: i64,
456    #[serde(flatten)]
457    /// Snapshot retention policy
458    pub retention: SnapshotRetention,
459}
460
461impl SnapshotReference {
462    /// Returns true if the snapshot reference is a branch.
463    pub fn is_branch(&self) -> bool {
464        matches!(self.retention, SnapshotRetention::Branch { .. })
465    }
466}
467
468impl SnapshotReference {
469    /// Create new snapshot reference
470    pub fn new(snapshot_id: i64, retention: SnapshotRetention) -> Self {
471        SnapshotReference {
472            snapshot_id,
473            retention,
474        }
475    }
476}
477
478#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone)]
479#[serde(rename_all = "lowercase", tag = "type")]
480/// The snapshot expiration procedure removes snapshots from table metadata and applies the table’s retention policy.
481pub enum SnapshotRetention {
482    #[serde(rename_all = "kebab-case")]
483    /// Branches are mutable named references that can be updated by committing a new snapshot as
484    /// the branch’s referenced snapshot using the Commit Conflict Resolution and Retry procedures.
485    Branch {
486        /// A positive number for the minimum number of snapshots to keep in a branch while expiring snapshots.
487        /// Defaults to table property history.expire.min-snapshots-to-keep.
488        #[serde(skip_serializing_if = "Option::is_none")]
489        min_snapshots_to_keep: Option<i32>,
490        /// A positive number for the max age of snapshots to keep when expiring, including the latest snapshot.
491        /// Defaults to table property history.expire.max-snapshot-age-ms.
492        #[serde(skip_serializing_if = "Option::is_none")]
493        max_snapshot_age_ms: Option<i64>,
494        /// For snapshot references except the main branch, a positive number for the max age of the snapshot reference to keep while expiring snapshots.
495        /// Defaults to table property history.expire.max-ref-age-ms. The main branch never expires.
496        #[serde(skip_serializing_if = "Option::is_none")]
497        max_ref_age_ms: Option<i64>,
498    },
499    #[serde(rename_all = "kebab-case")]
500    /// Tags are labels for individual snapshots.
501    Tag {
502        /// For snapshot references except the main branch, a positive number for the max age of the snapshot reference to keep while expiring snapshots.
503        /// Defaults to table property history.expire.max-ref-age-ms. The main branch never expires.
504        #[serde(skip_serializing_if = "Option::is_none")]
505        max_ref_age_ms: Option<i64>,
506    },
507}
508
509impl SnapshotRetention {
510    /// Create a new branch retention policy
511    pub fn branch(
512        min_snapshots_to_keep: Option<i32>,
513        max_snapshot_age_ms: Option<i64>,
514        max_ref_age_ms: Option<i64>,
515    ) -> Self {
516        SnapshotRetention::Branch {
517            min_snapshots_to_keep,
518            max_snapshot_age_ms,
519            max_ref_age_ms,
520        }
521    }
522}
523
524#[cfg(test)]
525mod tests {
526    use std::collections::HashMap;
527
528    use chrono::{TimeZone, Utc};
529
530    use crate::spec::TableMetadata;
531    use crate::spec::snapshot::_serde::SnapshotV1;
532    use crate::spec::snapshot::{Operation, Snapshot, Summary};
533
534    #[test]
535    fn schema() {
536        let record = r#"
537        {
538            "snapshot-id": 3051729675574597004,
539            "timestamp-ms": 1515100955770,
540            "summary": {
541                "operation": "append"
542            },
543            "manifest-list": "s3://b/wh/.../s1.avro",
544            "schema-id": 0
545        }
546        "#;
547
548        let result: Snapshot = serde_json::from_str::<SnapshotV1>(record)
549            .unwrap()
550            .try_into()
551            .unwrap();
552        assert_eq!(3051729675574597004, result.snapshot_id());
553        assert_eq!(
554            Utc.timestamp_millis_opt(1515100955770).unwrap(),
555            result.timestamp().unwrap()
556        );
557        assert_eq!(1515100955770, result.timestamp_ms());
558        assert_eq!(
559            Summary {
560                operation: Operation::Append,
561                additional_properties: HashMap::new()
562            },
563            *result.summary()
564        );
565        assert_eq!("s3://b/wh/.../s1.avro".to_string(), *result.manifest_list());
566    }
567
568    #[test]
569    fn test_snapshot_v1_to_v2_projection() {
570        use crate::spec::snapshot::_serde::SnapshotV1;
571
572        // Create a V1 snapshot (without sequence-number field)
573        let v1_snapshot = SnapshotV1 {
574            snapshot_id: 1234567890,
575            parent_snapshot_id: Some(987654321),
576            timestamp_ms: 1515100955770,
577            manifest_list: Some("s3://bucket/manifest-list.avro".to_string()),
578            manifests: None, // V1 can have either manifest_list or manifests, but not both
579            summary: Some(Summary {
580                operation: Operation::Append,
581                additional_properties: HashMap::from([
582                    ("added-files".to_string(), "5".to_string()),
583                    ("added-records".to_string(), "100".to_string()),
584                ]),
585            }),
586            schema_id: Some(1),
587        };
588
589        // Convert V1 to V2 - this should apply defaults for missing V2 fields
590        let v2_snapshot: Snapshot = v1_snapshot.try_into().unwrap();
591
592        // Verify V1→V2 projection defaults are applied correctly
593        assert_eq!(
594            v2_snapshot.sequence_number(),
595            0,
596            "V1 snapshot sequence_number should default to 0"
597        );
598
599        // Verify other fields are preserved correctly during conversion
600        assert_eq!(v2_snapshot.snapshot_id(), 1234567890);
601        assert_eq!(v2_snapshot.parent_snapshot_id(), Some(987654321));
602        assert_eq!(v2_snapshot.timestamp_ms(), 1515100955770);
603        assert_eq!(
604            v2_snapshot.manifest_list(),
605            "s3://bucket/manifest-list.avro"
606        );
607        assert_eq!(v2_snapshot.schema_id(), Some(1));
608        assert_eq!(v2_snapshot.summary().operation, Operation::Append);
609        assert_eq!(
610            v2_snapshot
611                .summary()
612                .additional_properties
613                .get("added-files"),
614            Some(&"5".to_string())
615        );
616    }
617
618    #[test]
619    fn test_v1_snapshot_with_manifest_list_and_manifests() {
620        {
621            let metadata = r#"
622    {
623        "format-version": 1,
624        "table-uuid": "d20125c8-7284-442c-9aea-15fee620737c",
625        "location": "s3://bucket/test/location",
626        "last-updated-ms": 1700000000000,
627        "last-column-id": 1,
628        "schema": {
629            "type": "struct",
630            "fields": [
631                {"id": 1, "name": "x", "required": true, "type": "long"}
632            ]
633        },
634        "partition-spec": [],
635        "properties": {},
636        "current-snapshot-id": 111111111,
637        "snapshots": [
638            {
639                "snapshot-id": 111111111,
640                "timestamp-ms": 1600000000000,
641                "summary": {"operation": "append"},
642                "manifest-list": "s3://bucket/metadata/snap-123.avro",
643                "manifests": ["s3://bucket/metadata/manifest-1.avro"]
644            }
645        ]
646    }
647    "#;
648
649            let result_both_manifest_list_and_manifest_set =
650                serde_json::from_str::<TableMetadata>(metadata);
651            assert!(result_both_manifest_list_and_manifest_set.is_err());
652            assert_eq!(
653                result_both_manifest_list_and_manifest_set
654                    .unwrap_err()
655                    .to_string(),
656                "DataInvalid => Invalid v1 snapshot, when manifest list provided, manifest files should be omitted"
657            )
658        }
659
660        {
661            let metadata = r#"
662    {
663        "format-version": 1,
664        "table-uuid": "d20125c8-7284-442c-9aea-15fee620737c",
665        "location": "s3://bucket/test/location",
666        "last-updated-ms": 1700000000000,
667        "last-column-id": 1,
668        "schema": {
669            "type": "struct",
670            "fields": [
671                {"id": 1, "name": "x", "required": true, "type": "long"}
672            ]
673        },
674        "partition-spec": [],
675        "properties": {},
676        "current-snapshot-id": 111111111,
677        "snapshots": [
678            {
679                "snapshot-id": 111111111,
680                "timestamp-ms": 1600000000000,
681                "summary": {"operation": "append"},
682                "manifests": ["s3://bucket/metadata/manifest-1.avro"]
683            }
684        ]
685    }
686    "#;
687            let result_missing_manifest_list = serde_json::from_str::<TableMetadata>(metadata);
688            assert!(result_missing_manifest_list.is_err());
689            assert_eq!(
690                result_missing_manifest_list.unwrap_err().to_string(),
691                "DataInvalid => Unsupported v1 snapshot, only manifest list is supported"
692            )
693        }
694    }
695
696    #[test]
697    fn test_snapshot_v1_to_v2_with_missing_summary() {
698        use crate::spec::snapshot::_serde::SnapshotV1;
699
700        // Create a V1 snapshot without summary (should get default)
701        let v1_snapshot = SnapshotV1 {
702            snapshot_id: 1111111111,
703            parent_snapshot_id: None,
704            timestamp_ms: 1515100955770,
705            manifest_list: Some("s3://bucket/manifest-list.avro".to_string()),
706            manifests: None,
707            summary: None, // V1 summary is optional
708            schema_id: None,
709        };
710
711        // Convert V1 to V2 - this should apply default summary
712        let v2_snapshot: Snapshot = v1_snapshot.try_into().unwrap();
713
714        // Verify defaults are applied correctly
715        assert_eq!(
716            v2_snapshot.sequence_number(),
717            0,
718            "V1 snapshot sequence_number should default to 0"
719        );
720        assert_eq!(
721            v2_snapshot.summary().operation,
722            Operation::Append,
723            "Missing V1 summary should default to Append operation"
724        );
725        assert!(
726            v2_snapshot.summary().additional_properties.is_empty(),
727            "Default summary should have empty additional_properties"
728        );
729
730        // Verify other fields
731        assert_eq!(v2_snapshot.snapshot_id(), 1111111111);
732        assert_eq!(v2_snapshot.parent_snapshot_id(), None);
733        assert_eq!(v2_snapshot.schema_id(), None);
734    }
735}
iceberg/spec/snapshot.rs

iceberg/spec/
snapshot.rs
