graphos_core/execution/
vector.rs

1//! ValueVector for columnar data storage.
2
3use std::sync::Arc;
4
5use graphos_common::types::{EdgeId, LogicalType, NodeId, Value};
6
7/// Default vector capacity (tuples per vector).
8pub const DEFAULT_VECTOR_CAPACITY: usize = 2048;
9
10/// A columnar vector of values.
11///
12/// ValueVector stores data in columnar format for efficient SIMD processing
13/// and cache utilization during query execution.
14#[derive(Debug, Clone)]
15pub struct ValueVector {
16    /// The logical type of values in this vector.
17    data_type: LogicalType,
18    /// The actual data storage.
19    data: VectorData,
20    /// Number of valid entries.
21    len: usize,
22    /// Validity bitmap (true = valid, false = null).
23    validity: Option<Vec<bool>>,
24}
25
26/// Internal storage for vector data.
27#[derive(Debug, Clone)]
28enum VectorData {
29    /// Boolean values.
30    Bool(Vec<bool>),
31    /// 64-bit integers.
32    Int64(Vec<i64>),
33    /// 64-bit floats.
34    Float64(Vec<f64>),
35    /// Strings (stored as Arc for cheap cloning).
36    String(Vec<Arc<str>>),
37    /// Node IDs.
38    NodeId(Vec<NodeId>),
39    /// Edge IDs.
40    EdgeId(Vec<EdgeId>),
41    /// Generic values (fallback for complex types).
42    Generic(Vec<Value>),
43}
44
45impl ValueVector {
46    /// Creates a new empty generic vector.
47    #[must_use]
48    pub fn new() -> Self {
49        Self::with_capacity(LogicalType::Any, DEFAULT_VECTOR_CAPACITY)
50    }
51
52    /// Creates a new empty vector with the given type.
53    #[must_use]
54    pub fn with_type(data_type: LogicalType) -> Self {
55        Self::with_capacity(data_type, DEFAULT_VECTOR_CAPACITY)
56    }
57
58    /// Creates a vector from a slice of values.
59    pub fn from_values(values: &[Value]) -> Self {
60        let mut vec = Self::new();
61        for value in values {
62            vec.push_value(value.clone());
63        }
64        vec
65    }
66
67    /// Creates a new vector with the given capacity.
68    #[must_use]
69    pub fn with_capacity(data_type: LogicalType, capacity: usize) -> Self {
70        let data = match &data_type {
71            LogicalType::Bool => VectorData::Bool(Vec::with_capacity(capacity)),
72            LogicalType::Int8 | LogicalType::Int16 | LogicalType::Int32 | LogicalType::Int64 => {
73                VectorData::Int64(Vec::with_capacity(capacity))
74            }
75            LogicalType::Float32 | LogicalType::Float64 => {
76                VectorData::Float64(Vec::with_capacity(capacity))
77            }
78            LogicalType::String => VectorData::String(Vec::with_capacity(capacity)),
79            LogicalType::Node => VectorData::NodeId(Vec::with_capacity(capacity)),
80            LogicalType::Edge => VectorData::EdgeId(Vec::with_capacity(capacity)),
81            _ => VectorData::Generic(Vec::with_capacity(capacity)),
82        };
83
84        Self {
85            data_type,
86            data,
87            len: 0,
88            validity: None,
89        }
90    }
91
92    /// Returns the data type of this vector.
93    #[must_use]
94    pub fn data_type(&self) -> &LogicalType {
95        &self.data_type
96    }
97
98    /// Returns the number of entries in this vector.
99    #[must_use]
100    pub fn len(&self) -> usize {
101        self.len
102    }
103
104    /// Returns true if this vector is empty.
105    #[must_use]
106    pub fn is_empty(&self) -> bool {
107        self.len == 0
108    }
109
110    /// Returns true if the value at index is null.
111    #[must_use]
112    pub fn is_null(&self, index: usize) -> bool {
113        self.validity
114            .as_ref()
115            .map_or(false, |v| !v.get(index).copied().unwrap_or(true))
116    }
117
118    /// Sets the value at index to null.
119    pub fn set_null(&mut self, index: usize) {
120        if self.validity.is_none() {
121            self.validity = Some(vec![true; self.len]);
122        }
123        if let Some(validity) = &mut self.validity {
124            if index < validity.len() {
125                validity[index] = false;
126            }
127        }
128    }
129
130    /// Pushes a boolean value.
131    pub fn push_bool(&mut self, value: bool) {
132        if let VectorData::Bool(vec) = &mut self.data {
133            vec.push(value);
134            self.len += 1;
135        }
136    }
137
138    /// Pushes an integer value.
139    pub fn push_int64(&mut self, value: i64) {
140        if let VectorData::Int64(vec) = &mut self.data {
141            vec.push(value);
142            self.len += 1;
143        }
144    }
145
146    /// Pushes a float value.
147    pub fn push_float64(&mut self, value: f64) {
148        if let VectorData::Float64(vec) = &mut self.data {
149            vec.push(value);
150            self.len += 1;
151        }
152    }
153
154    /// Pushes a string value.
155    pub fn push_string(&mut self, value: impl Into<Arc<str>>) {
156        if let VectorData::String(vec) = &mut self.data {
157            vec.push(value.into());
158            self.len += 1;
159        }
160    }
161
162    /// Pushes a node ID.
163    pub fn push_node_id(&mut self, value: NodeId) {
164        if let VectorData::NodeId(vec) = &mut self.data {
165            vec.push(value);
166            self.len += 1;
167        }
168    }
169
170    /// Pushes an edge ID.
171    pub fn push_edge_id(&mut self, value: EdgeId) {
172        if let VectorData::EdgeId(vec) = &mut self.data {
173            vec.push(value);
174            self.len += 1;
175        }
176    }
177
178    /// Pushes a generic value.
179    pub fn push_value(&mut self, value: Value) {
180        // Handle null values specially - push a default and mark as null
181        if matches!(value, Value::Null) {
182            match &mut self.data {
183                VectorData::Bool(vec) => vec.push(false),
184                VectorData::Int64(vec) => vec.push(0),
185                VectorData::Float64(vec) => vec.push(0.0),
186                VectorData::String(vec) => vec.push("".into()),
187                VectorData::NodeId(vec) => vec.push(NodeId::new(0)),
188                VectorData::EdgeId(vec) => vec.push(EdgeId::new(0)),
189                VectorData::Generic(vec) => vec.push(Value::Null),
190            }
191            self.len += 1;
192            self.set_null(self.len - 1);
193            return;
194        }
195
196        match (&mut self.data, &value) {
197            (VectorData::Bool(vec), Value::Bool(b)) => vec.push(*b),
198            (VectorData::Int64(vec), Value::Int64(i)) => vec.push(*i),
199            (VectorData::Float64(vec), Value::Float64(f)) => vec.push(*f),
200            (VectorData::String(vec), Value::String(s)) => vec.push(s.clone()),
201            (VectorData::Generic(vec), _) => vec.push(value),
202            _ => {
203                // Type mismatch - push a default value to maintain vector alignment
204                match &mut self.data {
205                    VectorData::Bool(vec) => vec.push(false),
206                    VectorData::Int64(vec) => vec.push(0),
207                    VectorData::Float64(vec) => vec.push(0.0),
208                    VectorData::String(vec) => vec.push("".into()),
209                    VectorData::NodeId(vec) => vec.push(NodeId::new(0)),
210                    VectorData::EdgeId(vec) => vec.push(EdgeId::new(0)),
211                    VectorData::Generic(vec) => vec.push(value),
212                }
213            }
214        }
215        self.len += 1;
216    }
217
218    /// Gets a boolean value at index.
219    #[must_use]
220    pub fn get_bool(&self, index: usize) -> Option<bool> {
221        if self.is_null(index) {
222            return None;
223        }
224        if let VectorData::Bool(vec) = &self.data {
225            vec.get(index).copied()
226        } else {
227            None
228        }
229    }
230
231    /// Gets an integer value at index.
232    #[must_use]
233    pub fn get_int64(&self, index: usize) -> Option<i64> {
234        if self.is_null(index) {
235            return None;
236        }
237        if let VectorData::Int64(vec) = &self.data {
238            vec.get(index).copied()
239        } else {
240            None
241        }
242    }
243
244    /// Gets a float value at index.
245    #[must_use]
246    pub fn get_float64(&self, index: usize) -> Option<f64> {
247        if self.is_null(index) {
248            return None;
249        }
250        if let VectorData::Float64(vec) = &self.data {
251            vec.get(index).copied()
252        } else {
253            None
254        }
255    }
256
257    /// Gets a string value at index.
258    #[must_use]
259    pub fn get_string(&self, index: usize) -> Option<&str> {
260        if self.is_null(index) {
261            return None;
262        }
263        if let VectorData::String(vec) = &self.data {
264            vec.get(index).map(|s| s.as_ref())
265        } else {
266            None
267        }
268    }
269
270    /// Gets a node ID at index.
271    #[must_use]
272    pub fn get_node_id(&self, index: usize) -> Option<NodeId> {
273        if self.is_null(index) {
274            return None;
275        }
276        if let VectorData::NodeId(vec) = &self.data {
277            vec.get(index).copied()
278        } else {
279            None
280        }
281    }
282
283    /// Gets an edge ID at index.
284    #[must_use]
285    pub fn get_edge_id(&self, index: usize) -> Option<EdgeId> {
286        if self.is_null(index) {
287            return None;
288        }
289        if let VectorData::EdgeId(vec) = &self.data {
290            vec.get(index).copied()
291        } else {
292            None
293        }
294    }
295
296    /// Gets a value at index as a generic Value.
297    #[must_use]
298    pub fn get_value(&self, index: usize) -> Option<Value> {
299        if self.is_null(index) {
300            return Some(Value::Null);
301        }
302
303        match &self.data {
304            VectorData::Bool(vec) => vec.get(index).map(|&v| Value::Bool(v)),
305            VectorData::Int64(vec) => vec.get(index).map(|&v| Value::Int64(v)),
306            VectorData::Float64(vec) => vec.get(index).map(|&v| Value::Float64(v)),
307            VectorData::String(vec) => vec.get(index).map(|v| Value::String(v.clone())),
308            VectorData::NodeId(vec) => vec.get(index).map(|&v| Value::Int64(v.as_u64() as i64)),
309            VectorData::EdgeId(vec) => vec.get(index).map(|&v| Value::Int64(v.as_u64() as i64)),
310            VectorData::Generic(vec) => vec.get(index).cloned(),
311        }
312    }
313
314    /// Alias for get_value.
315    #[must_use]
316    pub fn get(&self, index: usize) -> Option<Value> {
317        self.get_value(index)
318    }
319
320    /// Alias for push_value.
321    pub fn push(&mut self, value: Value) {
322        self.push_value(value);
323    }
324
325    /// Returns a slice of the underlying boolean data.
326    #[must_use]
327    pub fn as_bool_slice(&self) -> Option<&[bool]> {
328        if let VectorData::Bool(vec) = &self.data {
329            Some(vec)
330        } else {
331            None
332        }
333    }
334
335    /// Returns a slice of the underlying integer data.
336    #[must_use]
337    pub fn as_int64_slice(&self) -> Option<&[i64]> {
338        if let VectorData::Int64(vec) = &self.data {
339            Some(vec)
340        } else {
341            None
342        }
343    }
344
345    /// Returns a slice of the underlying float data.
346    #[must_use]
347    pub fn as_float64_slice(&self) -> Option<&[f64]> {
348        if let VectorData::Float64(vec) = &self.data {
349            Some(vec)
350        } else {
351            None
352        }
353    }
354
355    /// Returns a slice of the underlying node ID data.
356    #[must_use]
357    pub fn as_node_id_slice(&self) -> Option<&[NodeId]> {
358        if let VectorData::NodeId(vec) = &self.data {
359            Some(vec)
360        } else {
361            None
362        }
363    }
364
365    /// Returns a slice of the underlying edge ID data.
366    #[must_use]
367    pub fn as_edge_id_slice(&self) -> Option<&[EdgeId]> {
368        if let VectorData::EdgeId(vec) = &self.data {
369            Some(vec)
370        } else {
371            None
372        }
373    }
374
375    /// Returns the logical type of this vector.
376    #[must_use]
377    pub fn logical_type(&self) -> LogicalType {
378        self.data_type.clone()
379    }
380
381    /// Copies a row from this vector to the destination vector.
382    ///
383    /// The destination vector should have a compatible type. The value at `row`
384    /// is read from this vector and pushed to the destination vector.
385    pub fn copy_row_to(&self, row: usize, dest: &mut ValueVector) {
386        if self.is_null(row) {
387            dest.push_value(Value::Null);
388            return;
389        }
390
391        match &self.data {
392            VectorData::Bool(vec) => {
393                if let Some(&v) = vec.get(row) {
394                    dest.push_bool(v);
395                }
396            }
397            VectorData::Int64(vec) => {
398                if let Some(&v) = vec.get(row) {
399                    dest.push_int64(v);
400                }
401            }
402            VectorData::Float64(vec) => {
403                if let Some(&v) = vec.get(row) {
404                    dest.push_float64(v);
405                }
406            }
407            VectorData::String(vec) => {
408                if let Some(v) = vec.get(row) {
409                    dest.push_string(v.clone());
410                }
411            }
412            VectorData::NodeId(vec) => {
413                if let Some(&v) = vec.get(row) {
414                    dest.push_node_id(v);
415                }
416            }
417            VectorData::EdgeId(vec) => {
418                if let Some(&v) = vec.get(row) {
419                    dest.push_edge_id(v);
420                }
421            }
422            VectorData::Generic(vec) => {
423                if let Some(v) = vec.get(row) {
424                    dest.push_value(v.clone());
425                }
426            }
427        }
428    }
429
430    /// Clears all data from this vector.
431    pub fn clear(&mut self) {
432        match &mut self.data {
433            VectorData::Bool(vec) => vec.clear(),
434            VectorData::Int64(vec) => vec.clear(),
435            VectorData::Float64(vec) => vec.clear(),
436            VectorData::String(vec) => vec.clear(),
437            VectorData::NodeId(vec) => vec.clear(),
438            VectorData::EdgeId(vec) => vec.clear(),
439            VectorData::Generic(vec) => vec.clear(),
440        }
441        self.len = 0;
442        self.validity = None;
443    }
444}
445
446impl Default for ValueVector {
447    fn default() -> Self {
448        Self::new()
449    }
450}
451
452#[cfg(test)]
453mod tests {
454    use super::*;
455
456    #[test]
457    fn test_int64_vector() {
458        let mut vec = ValueVector::with_type(LogicalType::Int64);
459
460        vec.push_int64(1);
461        vec.push_int64(2);
462        vec.push_int64(3);
463
464        assert_eq!(vec.len(), 3);
465        assert_eq!(vec.get_int64(0), Some(1));
466        assert_eq!(vec.get_int64(1), Some(2));
467        assert_eq!(vec.get_int64(2), Some(3));
468    }
469
470    #[test]
471    fn test_string_vector() {
472        let mut vec = ValueVector::with_type(LogicalType::String);
473
474        vec.push_string("hello");
475        vec.push_string("world");
476
477        assert_eq!(vec.len(), 2);
478        assert_eq!(vec.get_string(0), Some("hello"));
479        assert_eq!(vec.get_string(1), Some("world"));
480    }
481
482    #[test]
483    fn test_null_values() {
484        let mut vec = ValueVector::with_type(LogicalType::Int64);
485
486        vec.push_int64(1);
487        vec.push_int64(2);
488        vec.push_int64(3);
489
490        assert!(!vec.is_null(1));
491        vec.set_null(1);
492        assert!(vec.is_null(1));
493
494        assert_eq!(vec.get_int64(0), Some(1));
495        assert_eq!(vec.get_int64(1), None); // Null
496        assert_eq!(vec.get_int64(2), Some(3));
497    }
498
499    #[test]
500    fn test_get_value() {
501        let mut vec = ValueVector::with_type(LogicalType::Int64);
502        vec.push_int64(42);
503
504        let value = vec.get_value(0);
505        assert_eq!(value, Some(Value::Int64(42)));
506    }
507
508    #[test]
509    fn test_slice_access() {
510        let mut vec = ValueVector::with_type(LogicalType::Int64);
511        vec.push_int64(1);
512        vec.push_int64(2);
513        vec.push_int64(3);
514
515        let slice = vec.as_int64_slice().unwrap();
516        assert_eq!(slice, &[1, 2, 3]);
517    }
518
519    #[test]
520    fn test_clear() {
521        let mut vec = ValueVector::with_type(LogicalType::Int64);
522        vec.push_int64(1);
523        vec.push_int64(2);
524
525        vec.clear();
526
527        assert!(vec.is_empty());
528        assert_eq!(vec.len(), 0);
529    }
530}
graphos_core/execution/vector.rs

graphos_core/execution/
vector.rs
