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Add NOT operator to VectorStore portable filter expressions

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- Add NOT expression type to the portable Filter.Expression model.
 - Add NOT to the Antlr grammar and implement the related parser listener method to generate Filter NOT expressions.
 - Add NOT support to the filter programming DSL.
 - Implement FilterHelper.negation for logically transform any boolean expression with NOT statements into
   semantically equivalent one with NOT applied to the leaf expressions.
 - Add tests for paresers, converters and vectorsores ITs.
 - Move the filter IN/NIN expansion logic to the FilterHelper
 - Factor out the filter IN/NIN boolean expression expansion logic out of Weaviate up to the FilterHelper.
 - add in/nin expantion FilterHelper tests
This commit is contained in:
Christian Tzolov
2023-11-23 21:29:48 +01:00
committed by Mark Pollack
parent e3e5070256
commit ac9ae589f4
25 changed files with 731 additions and 153 deletions
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6
vector-stores/spring-ai-pgvector-store/src/test/java/org/springframework/ai/vectorstore/PgVectorStoreIT.java
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@@ -182,6 +182,12 @@ public class PgVectorStoreIT {
assertThat(results.get(0).getId()).isIn(bgDocument.getId(), nlDocument.getId());
assertThat(results.get(1).getId()).isIn(bgDocument.getId(), nlDocument.getId());
results = vectorStore.similaritySearch(searchRequest
.withFilterExpression("NOT((country == 'BG' && year == 2020) || (country == 'NL'))"));
assertThat(results).hasSize(1);
assertThat(results.get(0).getId()).isEqualTo(bgDocument2.getId());
results = vectorStore.similaritySearch(SearchRequest.query("The World")
.withTopK(5)
.withSimilarityThresholdAll()