mito2/memtable/
simple_bulk_memtable.rs

1// Copyright 2023 Greptime Team
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#[cfg(any(test, feature = "test"))]
16mod test_only;
17
18use std::collections::HashSet;
19use std::fmt::{Debug, Formatter};
20use std::sync::atomic::{AtomicI64, AtomicU64, AtomicUsize, Ordering};
21use std::sync::{Arc, RwLock};
22use std::time::{Duration, Instant};
23
24use api::v1::OpType;
25use datatypes::vectors::Helper;
26use mito_codec::key_values::KeyValue;
27use rayon::prelude::*;
28use snafu::{OptionExt, ResultExt};
29use store_api::metadata::RegionMetadataRef;
30use store_api::storage::{ColumnId, SequenceNumber};
31
32use crate::flush::WriteBufferManagerRef;
33use crate::memtable::bulk::part::BulkPart;
34use crate::memtable::stats::WriteMetrics;
35use crate::memtable::time_series::Series;
36use crate::memtable::{
37    AllocTracker, BoxedBatchIterator, IterBuilder, KeyValues, MemScanMetrics, Memtable, MemtableId,
38    MemtableRange, MemtableRangeContext, MemtableRanges, MemtableRef, MemtableStats,
39};
40use crate::metrics::MEMTABLE_ACTIVE_SERIES_COUNT;
41use crate::read::dedup::LastNonNullIter;
42use crate::read::scan_region::PredicateGroup;
43use crate::read::Batch;
44use crate::region::options::MergeMode;
45use crate::{error, metrics};
46
47pub struct SimpleBulkMemtable {
48    id: MemtableId,
49    region_metadata: RegionMetadataRef,
50    alloc_tracker: AllocTracker,
51    max_timestamp: AtomicI64,
52    min_timestamp: AtomicI64,
53    max_sequence: AtomicU64,
54    dedup: bool,
55    merge_mode: MergeMode,
56    num_rows: AtomicUsize,
57    series: RwLock<Series>,
58}
59
60impl Drop for SimpleBulkMemtable {
61    fn drop(&mut self) {
62        MEMTABLE_ACTIVE_SERIES_COUNT.dec();
63    }
64}
65
66impl SimpleBulkMemtable {
67    pub fn new(
68        id: MemtableId,
69        region_metadata: RegionMetadataRef,
70        write_buffer_manager: Option<WriteBufferManagerRef>,
71        dedup: bool,
72        merge_mode: MergeMode,
73    ) -> Self {
74        let dedup = if merge_mode == MergeMode::LastNonNull {
75            false
76        } else {
77            dedup
78        };
79        let series = RwLock::new(Series::with_capacity(&region_metadata, 1024, 8192));
80
81        Self {
82            id,
83            region_metadata,
84            alloc_tracker: AllocTracker::new(write_buffer_manager),
85            max_timestamp: AtomicI64::new(i64::MIN),
86            min_timestamp: AtomicI64::new(i64::MAX),
87            max_sequence: AtomicU64::new(0),
88            dedup,
89            merge_mode,
90            num_rows: AtomicUsize::new(0),
91            series,
92        }
93    }
94
95    fn build_projection(&self, projection: Option<&[ColumnId]>) -> HashSet<ColumnId> {
96        if let Some(projection) = projection {
97            projection.iter().copied().collect()
98        } else {
99            self.region_metadata
100                .field_columns()
101                .map(|c| c.column_id)
102                .collect()
103        }
104    }
105
106    fn write_key_value(&self, kv: KeyValue, stats: &mut WriteMetrics) {
107        let ts = kv.timestamp();
108        let sequence = kv.sequence();
109        let op_type = kv.op_type();
110        let mut series = self.series.write().unwrap();
111        let size = series.push(ts, sequence, op_type, kv.fields());
112        stats.value_bytes += size;
113        // safety: timestamp of kv must be both present and a valid timestamp value.
114        let ts = kv.timestamp().as_timestamp().unwrap().unwrap().value();
115        stats.min_ts = stats.min_ts.min(ts);
116        stats.max_ts = stats.max_ts.max(ts);
117    }
118
119    /// Updates memtable stats.
120    fn update_stats(&self, stats: WriteMetrics) {
121        self.alloc_tracker
122            .on_allocation(stats.key_bytes + stats.value_bytes);
123        self.num_rows.fetch_add(stats.num_rows, Ordering::SeqCst);
124        self.max_timestamp.fetch_max(stats.max_ts, Ordering::SeqCst);
125        self.min_timestamp.fetch_min(stats.min_ts, Ordering::SeqCst);
126        self.max_sequence
127            .fetch_max(stats.max_sequence, Ordering::SeqCst);
128    }
129
130    #[cfg(test)]
131    fn schema(&self) -> &RegionMetadataRef {
132        &self.region_metadata
133    }
134}
135
136impl Debug for SimpleBulkMemtable {
137    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
138        f.debug_struct("SimpleBulkMemtable").finish()
139    }
140}
141
142impl Memtable for SimpleBulkMemtable {
143    fn id(&self) -> MemtableId {
144        self.id
145    }
146
147    fn write(&self, kvs: &KeyValues) -> error::Result<()> {
148        let mut stats = WriteMetrics::default();
149        let max_sequence = kvs.max_sequence();
150        for kv in kvs.iter() {
151            self.write_key_value(kv, &mut stats);
152        }
153        stats.max_sequence = max_sequence;
154        stats.num_rows = kvs.num_rows();
155        self.update_stats(stats);
156        Ok(())
157    }
158
159    fn write_one(&self, kv: KeyValue) -> error::Result<()> {
160        debug_assert_eq!(0, kv.num_primary_keys());
161        let mut stats = WriteMetrics::default();
162        self.write_key_value(kv, &mut stats);
163        stats.num_rows = 1;
164        stats.max_sequence = kv.sequence();
165        self.update_stats(stats);
166        Ok(())
167    }
168
169    fn write_bulk(&self, part: BulkPart) -> error::Result<()> {
170        let rb = &part.batch;
171
172        let ts = Helper::try_into_vector(
173            rb.column_by_name(&self.region_metadata.time_index_column().column_schema.name)
174                .with_context(|| error::InvalidRequestSnafu {
175                    region_id: self.region_metadata.region_id,
176                    reason: "Timestamp not found",
177                })?,
178        )
179        .context(error::ConvertVectorSnafu)?;
180
181        let sequence = part.sequence;
182
183        let fields: Vec<_> = self
184            .region_metadata
185            .field_columns()
186            .map(|f| {
187                let array = rb.column_by_name(&f.column_schema.name).ok_or_else(|| {
188                    error::InvalidRequestSnafu {
189                        region_id: self.region_metadata.region_id,
190                        reason: format!("Column {} not found", f.column_schema.name),
191                    }
192                    .build()
193                })?;
194                Helper::try_into_vector(array).context(error::ConvertVectorSnafu)
195            })
196            .collect::<error::Result<Vec<_>>>()?;
197
198        let mut series = self.series.write().unwrap();
199        let extend_timer = metrics::REGION_WORKER_HANDLE_WRITE_ELAPSED
200            .with_label_values(&["bulk_extend"])
201            .start_timer();
202        series.extend(ts, OpType::Put as u8, sequence, fields)?;
203        extend_timer.observe_duration();
204
205        self.update_stats(WriteMetrics {
206            key_bytes: 0,
207            value_bytes: part.estimated_size(),
208            min_ts: part.min_ts,
209            max_ts: part.max_ts,
210            num_rows: part.num_rows(),
211            max_sequence: sequence,
212        });
213        Ok(())
214    }
215
216    #[cfg(any(test, feature = "test"))]
217    fn iter(
218        &self,
219        projection: Option<&[ColumnId]>,
220        _predicate: Option<table::predicate::Predicate>,
221        sequence: Option<SequenceNumber>,
222    ) -> error::Result<BoxedBatchIterator> {
223        let iter = self.create_iter(projection, sequence)?.build(None)?;
224
225        if self.merge_mode == MergeMode::LastNonNull {
226            let iter = LastNonNullIter::new(iter);
227            Ok(Box::new(iter))
228        } else {
229            Ok(Box::new(iter))
230        }
231    }
232
233    fn ranges(
234        &self,
235        projection: Option<&[ColumnId]>,
236        predicate: PredicateGroup,
237        sequence: Option<SequenceNumber>,
238    ) -> error::Result<MemtableRanges> {
239        let start_time = Instant::now();
240        let projection = Arc::new(self.build_projection(projection));
241        let values = self.series.read().unwrap().read_to_values();
242        let contexts = values
243            .into_par_iter()
244            .filter_map(|v| {
245                let filtered = match v
246                    .to_batch(&[], &self.region_metadata, &projection, self.dedup)
247                    .and_then(|mut b| {
248                        b.filter_by_sequence(sequence)?;
249                        Ok(b)
250                    }) {
251                    Ok(filtered) => filtered,
252                    Err(e) => {
253                        return Some(Err(e));
254                    }
255                };
256                if filtered.is_empty() {
257                    None
258                } else {
259                    Some(Ok(filtered))
260                }
261            })
262            .map(|result| {
263                result.map(|batch| {
264                    let num_rows = batch.num_rows();
265                    let builder = BatchRangeBuilder {
266                        batch,
267                        merge_mode: self.merge_mode,
268                        scan_cost: start_time.elapsed(),
269                    };
270                    (
271                        num_rows,
272                        Arc::new(MemtableRangeContext::new(
273                            self.id,
274                            Box::new(builder),
275                            predicate.clone(),
276                        )),
277                    )
278                })
279            })
280            .collect::<error::Result<Vec<_>>>()?;
281
282        let ranges = contexts
283            .into_iter()
284            .enumerate()
285            .map(|(idx, (num_rows, context))| (idx, MemtableRange::new(context, num_rows)))
286            .collect();
287
288        Ok(MemtableRanges {
289            ranges,
290            stats: self.stats(),
291        })
292    }
293
294    fn is_empty(&self) -> bool {
295        self.series.read().unwrap().is_empty()
296    }
297
298    fn freeze(&self) -> error::Result<()> {
299        self.series.write().unwrap().freeze(&self.region_metadata);
300        Ok(())
301    }
302
303    fn stats(&self) -> MemtableStats {
304        let estimated_bytes = self.alloc_tracker.bytes_allocated();
305        let num_rows = self.num_rows.load(Ordering::Relaxed);
306        if num_rows == 0 {
307            // no rows ever written
308            return MemtableStats {
309                estimated_bytes,
310                time_range: None,
311                num_rows: 0,
312                num_ranges: 0,
313                max_sequence: 0,
314                series_count: 0,
315            };
316        }
317        let ts_type = self
318            .region_metadata
319            .time_index_column()
320            .column_schema
321            .data_type
322            .clone()
323            .as_timestamp()
324            .expect("Timestamp column must have timestamp type");
325        let max_timestamp = ts_type.create_timestamp(self.max_timestamp.load(Ordering::Relaxed));
326        let min_timestamp = ts_type.create_timestamp(self.min_timestamp.load(Ordering::Relaxed));
327        MemtableStats {
328            estimated_bytes,
329            time_range: Some((min_timestamp, max_timestamp)),
330            num_rows,
331            num_ranges: 1,
332            max_sequence: self.max_sequence.load(Ordering::Relaxed),
333            series_count: 1,
334        }
335    }
336
337    fn fork(&self, id: MemtableId, metadata: &RegionMetadataRef) -> MemtableRef {
338        Arc::new(Self::new(
339            id,
340            metadata.clone(),
341            self.alloc_tracker.write_buffer_manager(),
342            self.dedup,
343            self.merge_mode,
344        ))
345    }
346}
347
348#[derive(Clone)]
349pub struct BatchRangeBuilder {
350    pub batch: Batch,
351    pub merge_mode: MergeMode,
352    scan_cost: Duration,
353}
354
355impl IterBuilder for BatchRangeBuilder {
356    fn build(&self, metrics: Option<MemScanMetrics>) -> error::Result<BoxedBatchIterator> {
357        let batch = self.batch.clone();
358        if let Some(metrics) = metrics {
359            let inner = crate::memtable::MemScanMetricsData {
360                total_series: 1,
361                num_rows: batch.num_rows(),
362                num_batches: 1,
363                scan_cost: self.scan_cost,
364            };
365            metrics.merge_inner(&inner);
366        }
367
368        let iter = Iter {
369            batch: Some(Ok(batch)),
370        };
371
372        if self.merge_mode == MergeMode::LastNonNull {
373            Ok(Box::new(LastNonNullIter::new(iter)))
374        } else {
375            Ok(Box::new(iter))
376        }
377    }
378}
379
380struct Iter {
381    batch: Option<error::Result<Batch>>,
382}
383
384impl Iterator for Iter {
385    type Item = error::Result<Batch>;
386
387    fn next(&mut self) -> Option<Self::Item> {
388        self.batch.take()
389    }
390}
391
392#[cfg(test)]
393mod tests {
394    use std::sync::Arc;
395
396    use api::v1::helper::row;
397    use api::v1::value::ValueData;
398    use api::v1::{Mutation, OpType, Rows, SemanticType};
399    use common_recordbatch::DfRecordBatch;
400    use common_time::Timestamp;
401    use datatypes::arrow::array::{ArrayRef, Float64Array, RecordBatch, TimestampMillisecondArray};
402    use datatypes::arrow_array::StringArray;
403    use datatypes::data_type::ConcreteDataType;
404    use datatypes::prelude::{ScalarVector, Vector};
405    use datatypes::schema::ColumnSchema;
406    use datatypes::value::Value;
407    use datatypes::vectors::TimestampMillisecondVector;
408    use store_api::metadata::{ColumnMetadata, RegionMetadataBuilder};
409    use store_api::storage::{RegionId, SequenceNumber};
410
411    use super::*;
412    use crate::read;
413    use crate::read::dedup::DedupReader;
414    use crate::read::merge::MergeReaderBuilder;
415    use crate::read::{BatchReader, Source};
416    use crate::region::options::MergeMode;
417    use crate::test_util::column_metadata_to_column_schema;
418
419    fn new_test_metadata() -> RegionMetadataRef {
420        let mut builder = RegionMetadataBuilder::new(1.into());
421        builder
422            .push_column_metadata(ColumnMetadata {
423                column_schema: ColumnSchema::new(
424                    "ts",
425                    ConcreteDataType::timestamp_millisecond_datatype(),
426                    false,
427                ),
428                semantic_type: SemanticType::Timestamp,
429                column_id: 1,
430            })
431            .push_column_metadata(ColumnMetadata {
432                column_schema: ColumnSchema::new("f1", ConcreteDataType::float64_datatype(), true),
433                semantic_type: SemanticType::Field,
434                column_id: 2,
435            })
436            .push_column_metadata(ColumnMetadata {
437                column_schema: ColumnSchema::new("f2", ConcreteDataType::string_datatype(), true),
438                semantic_type: SemanticType::Field,
439                column_id: 3,
440            });
441        Arc::new(builder.build().unwrap())
442    }
443
444    fn new_test_memtable(dedup: bool, merge_mode: MergeMode) -> SimpleBulkMemtable {
445        SimpleBulkMemtable::new(1, new_test_metadata(), None, dedup, merge_mode)
446    }
447
448    fn build_key_values(
449        metadata: &RegionMetadataRef,
450        sequence: SequenceNumber,
451        row_values: &[(i64, f64, String)],
452        op_type: OpType,
453    ) -> KeyValues {
454        let column_schemas: Vec<_> = metadata
455            .column_metadatas
456            .iter()
457            .map(column_metadata_to_column_schema)
458            .collect();
459
460        let rows: Vec<_> = row_values
461            .iter()
462            .map(|(ts, f1, f2)| {
463                row(vec![
464                    ValueData::TimestampMillisecondValue(*ts),
465                    ValueData::F64Value(*f1),
466                    ValueData::StringValue(f2.clone()),
467                ])
468            })
469            .collect();
470        let mutation = Mutation {
471            op_type: op_type as i32,
472            sequence,
473            rows: Some(Rows {
474                schema: column_schemas,
475                rows,
476            }),
477            write_hint: None,
478        };
479        KeyValues::new(metadata, mutation).unwrap()
480    }
481
482    #[test]
483    fn test_write_and_iter() {
484        let memtable = new_test_memtable(false, MergeMode::LastRow);
485        memtable
486            .write(&build_key_values(
487                &memtable.region_metadata,
488                0,
489                &[(1, 1.0, "a".to_string())],
490                OpType::Put,
491            ))
492            .unwrap();
493        memtable
494            .write(&build_key_values(
495                &memtable.region_metadata,
496                1,
497                &[(2, 2.0, "b".to_string())],
498                OpType::Put,
499            ))
500            .unwrap();
501
502        let mut iter = memtable.iter(None, None, None).unwrap();
503        let batch = iter.next().unwrap().unwrap();
504        assert_eq!(2, batch.num_rows());
505        assert_eq!(2, batch.fields().len());
506        let ts_v = batch
507            .timestamps()
508            .as_any()
509            .downcast_ref::<TimestampMillisecondVector>()
510            .unwrap();
511        assert_eq!(Value::Timestamp(Timestamp::new_millisecond(1)), ts_v.get(0));
512        assert_eq!(Value::Timestamp(Timestamp::new_millisecond(2)), ts_v.get(1));
513    }
514
515    #[test]
516    fn test_projection() {
517        let memtable = new_test_memtable(false, MergeMode::LastRow);
518        memtable
519            .write(&build_key_values(
520                &memtable.region_metadata,
521                0,
522                &[(1, 1.0, "a".to_string())],
523                OpType::Put,
524            ))
525            .unwrap();
526
527        let mut iter = memtable.iter(None, None, None).unwrap();
528        let batch = iter.next().unwrap().unwrap();
529        assert_eq!(1, batch.num_rows());
530        assert_eq!(2, batch.fields().len());
531
532        let ts_v = batch
533            .timestamps()
534            .as_any()
535            .downcast_ref::<TimestampMillisecondVector>()
536            .unwrap();
537        assert_eq!(Value::Timestamp(Timestamp::new_millisecond(1)), ts_v.get(0));
538
539        // Only project column 2 (f1)
540        let projection = vec![2];
541        let mut iter = memtable.iter(Some(&projection), None, None).unwrap();
542        let batch = iter.next().unwrap().unwrap();
543
544        assert_eq!(1, batch.num_rows());
545        assert_eq!(1, batch.fields().len()); // only f1
546        assert_eq!(2, batch.fields()[0].column_id);
547    }
548
549    #[test]
550    fn test_dedup() {
551        let memtable = new_test_memtable(true, MergeMode::LastRow);
552        memtable
553            .write(&build_key_values(
554                &memtable.region_metadata,
555                0,
556                &[(1, 1.0, "a".to_string())],
557                OpType::Put,
558            ))
559            .unwrap();
560        memtable
561            .write(&build_key_values(
562                &memtable.region_metadata,
563                1,
564                &[(1, 2.0, "b".to_string())],
565                OpType::Put,
566            ))
567            .unwrap();
568        let mut iter = memtable.iter(None, None, None).unwrap();
569        let batch = iter.next().unwrap().unwrap();
570
571        assert_eq!(1, batch.num_rows()); // deduped to 1 row
572        assert_eq!(2.0, batch.fields()[0].data.get(0).as_f64_lossy().unwrap()); // last write wins
573    }
574
575    #[test]
576    fn test_write_one() {
577        let memtable = new_test_memtable(false, MergeMode::LastRow);
578        let kvs = build_key_values(
579            &memtable.region_metadata,
580            0,
581            &[(1, 1.0, "a".to_string())],
582            OpType::Put,
583        );
584        let kv = kvs.iter().next().unwrap();
585        memtable.write_one(kv).unwrap();
586
587        let mut iter = memtable.iter(None, None, None).unwrap();
588        let batch = iter.next().unwrap().unwrap();
589        assert_eq!(1, batch.num_rows());
590    }
591
592    #[tokio::test]
593    async fn test_write_dedup() {
594        let memtable = new_test_memtable(true, MergeMode::LastRow);
595        let kvs = build_key_values(
596            &memtable.region_metadata,
597            0,
598            &[(1, 1.0, "a".to_string())],
599            OpType::Put,
600        );
601        let kv = kvs.iter().next().unwrap();
602        memtable.write_one(kv).unwrap();
603        memtable.freeze().unwrap();
604
605        let kvs = build_key_values(
606            &memtable.region_metadata,
607            1,
608            &[(1, 1.0, "a".to_string())],
609            OpType::Delete,
610        );
611        let kv = kvs.iter().next().unwrap();
612        memtable.write_one(kv).unwrap();
613
614        let ranges = memtable
615            .ranges(None, PredicateGroup::default(), None)
616            .unwrap();
617        let mut source = vec![];
618        for r in ranges.ranges.values() {
619            source.push(Source::Iter(r.build_iter().unwrap()));
620        }
621
622        let reader = MergeReaderBuilder::from_sources(source)
623            .build()
624            .await
625            .unwrap();
626
627        let mut reader = DedupReader::new(reader, read::dedup::LastRow::new(false));
628        let mut num_rows = 0;
629        while let Some(b) = reader.next_batch().await.unwrap() {
630            num_rows += b.num_rows();
631        }
632        assert_eq!(num_rows, 1);
633    }
634
635    #[tokio::test]
636    async fn test_delete_only() {
637        let memtable = new_test_memtable(true, MergeMode::LastRow);
638        let kvs = build_key_values(
639            &memtable.region_metadata,
640            0,
641            &[(1, 1.0, "a".to_string())],
642            OpType::Delete,
643        );
644        let kv = kvs.iter().next().unwrap();
645        memtable.write_one(kv).unwrap();
646        memtable.freeze().unwrap();
647
648        let ranges = memtable
649            .ranges(None, PredicateGroup::default(), None)
650            .unwrap();
651        let mut source = vec![];
652        for r in ranges.ranges.values() {
653            source.push(Source::Iter(r.build_iter().unwrap()));
654        }
655
656        let reader = MergeReaderBuilder::from_sources(source)
657            .build()
658            .await
659            .unwrap();
660
661        let mut reader = DedupReader::new(reader, read::dedup::LastRow::new(false));
662        let mut num_rows = 0;
663        while let Some(b) = reader.next_batch().await.unwrap() {
664            num_rows += b.num_rows();
665            assert_eq!(b.num_rows(), 1);
666            assert_eq!(b.op_types().get_data(0).unwrap(), OpType::Delete as u8);
667        }
668        assert_eq!(num_rows, 1);
669    }
670
671    #[tokio::test]
672    async fn test_single_range() {
673        let memtable = new_test_memtable(true, MergeMode::LastRow);
674        let kvs = build_key_values(
675            &memtable.region_metadata,
676            0,
677            &[(1, 1.0, "a".to_string())],
678            OpType::Put,
679        );
680        memtable.write_one(kvs.iter().next().unwrap()).unwrap();
681
682        let kvs = build_key_values(
683            &memtable.region_metadata,
684            1,
685            &[(1, 2.0, "b".to_string())],
686            OpType::Put,
687        );
688        memtable.write_one(kvs.iter().next().unwrap()).unwrap();
689        memtable.freeze().unwrap();
690
691        let ranges = memtable
692            .ranges(None, PredicateGroup::default(), None)
693            .unwrap();
694        assert_eq!(ranges.ranges.len(), 1);
695        let range = ranges.ranges.into_values().next().unwrap();
696        let mut reader = range.context.builder.build(None).unwrap();
697
698        let mut num_rows = 0;
699        while let Some(b) = reader.next().transpose().unwrap() {
700            num_rows += b.num_rows();
701            assert_eq!(b.fields()[1].data.get(0).as_string(), Some("b".to_string()));
702        }
703        assert_eq!(num_rows, 1);
704    }
705
706    #[test]
707    fn test_write_bulk() {
708        let memtable = new_test_memtable(false, MergeMode::LastRow);
709        let arrow_schema = memtable.schema().schema.arrow_schema().clone();
710        let arrays = vec![
711            Arc::new(TimestampMillisecondArray::from(vec![1, 2])) as ArrayRef,
712            Arc::new(Float64Array::from(vec![1.0, 2.0])) as ArrayRef,
713            Arc::new(StringArray::from(vec!["a", "b"])) as ArrayRef,
714        ];
715        let rb = DfRecordBatch::try_new(arrow_schema, arrays).unwrap();
716
717        let part = BulkPart {
718            batch: rb,
719            sequence: 1,
720            min_ts: 1,
721            max_ts: 2,
722            timestamp_index: 0,
723            raw_data: None,
724        };
725        memtable.write_bulk(part).unwrap();
726
727        let mut iter = memtable.iter(None, None, None).unwrap();
728        let batch = iter.next().unwrap().unwrap();
729        assert_eq!(2, batch.num_rows());
730
731        let stats = memtable.stats();
732        assert_eq!(1, stats.max_sequence);
733        assert_eq!(2, stats.num_rows);
734        assert_eq!(
735            Some((Timestamp::new_millisecond(1), Timestamp::new_millisecond(2))),
736            stats.time_range
737        );
738
739        let kvs = build_key_values(
740            &memtable.region_metadata,
741            2,
742            &[(3, 3.0, "c".to_string())],
743            OpType::Put,
744        );
745        memtable.write(&kvs).unwrap();
746        let mut iter = memtable.iter(None, None, None).unwrap();
747        let batch = iter.next().unwrap().unwrap();
748        assert_eq!(3, batch.num_rows());
749        assert_eq!(
750            vec![1, 2, 3],
751            batch
752                .timestamps()
753                .as_any()
754                .downcast_ref::<TimestampMillisecondVector>()
755                .unwrap()
756                .iter_data()
757                .map(|t| { t.unwrap().0.value() })
758                .collect::<Vec<_>>()
759        );
760    }
761
762    #[test]
763    fn test_is_empty() {
764        let memtable = new_test_memtable(false, MergeMode::LastRow);
765        assert!(memtable.is_empty());
766
767        memtable
768            .write(&build_key_values(
769                &memtable.region_metadata,
770                0,
771                &[(1, 1.0, "a".to_string())],
772                OpType::Put,
773            ))
774            .unwrap();
775        assert!(!memtable.is_empty());
776    }
777
778    #[test]
779    fn test_stats() {
780        let memtable = new_test_memtable(false, MergeMode::LastRow);
781        let stats = memtable.stats();
782        assert_eq!(0, stats.num_rows);
783        assert!(stats.time_range.is_none());
784
785        memtable
786            .write(&build_key_values(
787                &memtable.region_metadata,
788                0,
789                &[(1, 1.0, "a".to_string())],
790                OpType::Put,
791            ))
792            .unwrap();
793        let stats = memtable.stats();
794        assert_eq!(1, stats.num_rows);
795        assert!(stats.time_range.is_some());
796    }
797
798    #[test]
799    fn test_fork() {
800        let memtable = new_test_memtable(false, MergeMode::LastRow);
801        memtable
802            .write(&build_key_values(
803                &memtable.region_metadata,
804                0,
805                &[(1, 1.0, "a".to_string())],
806                OpType::Put,
807            ))
808            .unwrap();
809
810        let forked = memtable.fork(2, &memtable.region_metadata);
811        assert!(forked.is_empty());
812    }
813
814    #[test]
815    fn test_sequence_filter() {
816        let memtable = new_test_memtable(false, MergeMode::LastRow);
817        memtable
818            .write(&build_key_values(
819                &memtable.region_metadata,
820                0,
821                &[(1, 1.0, "a".to_string())],
822                OpType::Put,
823            ))
824            .unwrap();
825        memtable
826            .write(&build_key_values(
827                &memtable.region_metadata,
828                1,
829                &[(2, 2.0, "b".to_string())],
830                OpType::Put,
831            ))
832            .unwrap();
833
834        // Filter with sequence 0 should only return first write
835        let mut iter = memtable.iter(None, None, Some(0)).unwrap();
836        let batch = iter.next().unwrap().unwrap();
837        assert_eq!(1, batch.num_rows());
838        assert_eq!(1.0, batch.fields()[0].data.get(0).as_f64_lossy().unwrap());
839    }
840
841    fn rb_with_large_string(
842        ts: i64,
843        string_len: i32,
844        region_meta: &RegionMetadataRef,
845    ) -> RecordBatch {
846        let schema = region_meta.schema.arrow_schema().clone();
847        RecordBatch::try_new(
848            schema,
849            vec![
850                Arc::new(StringArray::from_iter_values(
851                    ["a".repeat(string_len as usize).to_string()].into_iter(),
852                )) as ArrayRef,
853                Arc::new(TimestampMillisecondArray::from_iter_values(
854                    [ts].into_iter(),
855                )) as ArrayRef,
856            ],
857        )
858        .unwrap()
859    }
860
861    #[tokio::test]
862    async fn test_write_read_large_string() {
863        let mut builder = RegionMetadataBuilder::new(RegionId::new(123, 456));
864        builder
865            .push_column_metadata(ColumnMetadata {
866                column_schema: ColumnSchema::new("k0", ConcreteDataType::string_datatype(), false),
867                semantic_type: SemanticType::Field,
868                column_id: 0,
869            })
870            .push_column_metadata(ColumnMetadata {
871                column_schema: ColumnSchema::new(
872                    "ts",
873                    ConcreteDataType::timestamp_millisecond_datatype(),
874                    false,
875                ),
876                semantic_type: SemanticType::Timestamp,
877                column_id: 1,
878            })
879            .primary_key(vec![]);
880        let region_meta = Arc::new(builder.build().unwrap());
881        let memtable =
882            SimpleBulkMemtable::new(0, region_meta.clone(), None, true, MergeMode::LastRow);
883        memtable
884            .write_bulk(BulkPart {
885                batch: rb_with_large_string(0, i32::MAX, &region_meta),
886                max_ts: 0,
887                min_ts: 0,
888                sequence: 0,
889                timestamp_index: 1,
890                raw_data: None,
891            })
892            .unwrap();
893
894        memtable.freeze().unwrap();
895        memtable
896            .write_bulk(BulkPart {
897                batch: rb_with_large_string(1, 3, &region_meta),
898                max_ts: 1,
899                min_ts: 1,
900                sequence: 1,
901                timestamp_index: 1,
902                raw_data: None,
903            })
904            .unwrap();
905        let MemtableRanges { ranges, .. } = memtable
906            .ranges(None, PredicateGroup::default(), None)
907            .unwrap();
908        let mut source = if ranges.len() == 1 {
909            let only_range = ranges.into_values().next().unwrap();
910            Source::Iter(only_range.build_iter().unwrap())
911        } else {
912            let sources = ranges
913                .into_values()
914                .map(|r| r.build_iter().map(Source::Iter))
915                .collect::<error::Result<Vec<_>>>()
916                .unwrap();
917            let merge_reader = MergeReaderBuilder::from_sources(sources)
918                .build()
919                .await
920                .unwrap();
921            Source::Reader(Box::new(merge_reader))
922        };
923
924        let mut rows = 0;
925        while let Some(b) = source.next_batch().await.unwrap() {
926            rows += b.num_rows();
927        }
928        assert_eq!(rows, 2);
929    }
930}
mito2/memtable/simple_bulk_memtable.rs

mito2/memtable/
simple_bulk_memtable.rs
