2026-01-18 - 2026-07-18
Overview
1 Release published by 1 user
191 Issues closed from 1 user
Closed
#273 [PR #272] [MERGED] Feature: Support metadata based filtering for delete operations
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#272 [PR #270] [MERGED] fix: reindex&drop_index without schema
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#266 [PR #260] [MERGED] fix(docs): update command to install packages using uv & update port …
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#267 [PR #264] [MERGED] Feature: Add Document Retrieval with Metadata Filtering similar to Chroma Vector Store
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#268 [PR #261] [MERGED] Metadata json filtering
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#269 [PR #263] [MERGED] release: 0.0.16
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#270 [PR #267] [MERGED] Fix incorrect connection string format in README.md example
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#261 [PR #251] [MERGED] chore: update PGVectorStore How to guide
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#262 [PR #256] [MERGED] fix: Normalize scores in RRF ranking in hybrid search
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#263 [PR #255] [MERGED] fix: Normalize results in wighted sum ranking
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#264 [PR #257] [MERGED] fix: Fix hybrid search bugs
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#265 [PR #254] [MERGED] chore: Add psycopg binary as a dependency
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#257 [PR #244] [MERGED] feat: add async and sync hybrid search index creation methods
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#258 [PR #245] [MERGED] docs: Add documentation for Hybrid Search
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#259 [PR #243] [MERGED] fix : correct type checking against db column for embedding_column variable
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#252 [PR #230] [CLOSED] fix: Use JSONB for metadata column instead of JSON
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#253 [PR #231] [CLOSED] Feature: Add Document Retrieval with Metadata Filtering
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#254 [PR #233] [CLOSED] chore: add documentation for Hybrid Seach
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#255 [PR #239] [CLOSED] fix: PGVector --> PGVectorStore: migration fails for a custom db schema
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#256 [PR #242] [CLOSED] Fix/custom db schema
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#250 [PR #229] [CLOSED] fix: Use JSONB for metadata column instead of JSON
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#242 [PR #221] [MERGED] Release 0.0.15
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#243 [PR #218] [MERGED] Remove wrong async
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#244 [PR #219] [CLOSED] fix: remove async for sync method
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#245 [PR #222] [CLOSED] Fixed the bug of reindex and drop_index when specifying the schema
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#246 [PR #223] [MERGED] deps: add missing dependencies in test group
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#237 [PR #211] [MERGED] feat: Added Hybrid Search Config and Tests [1/N]
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#238 [PR #210] [MERGED] fix: Add support for a metadata column named id in PGVectorStore
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#239 [PR #212] [MERGED] ci: migrate to uv
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#240 [PR #217] [MERGED] Fixed support for VectorStore search filters with multiple $like/$ilike/$in/$nin on same column
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#232 [PR #206] [CLOSED] chore: Make the private variable __vs to semi private
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#234 [PR #207] [CLOSED] feat: Adding multi modal support for PGVectorStore
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#235 [PR #205] [MERGED] Update README.md
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#236 [PR #208] [MERGED] fix(deps): Allow Numpy 2.x to fix dependencies resolution on Python 3.13
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#227 [PR #199] [MERGED] docs: update tutorial
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#228 [PR #198] [MERGED] Update README.md
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#229 [PR #201] [MERGED] chore: Update vectorstore search to support inline embedding
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#230 [PR #200] [MERGED] chore(docs): Add an Async Explainer doc
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#231 [PR #203] [CLOSED] feat: Adding PGChatMessageHistory
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#222 [PR #193] [MERGED] docs: partial tutorial rework
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#223 [PR #195] [MERGED] feat: add drop table
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#224 [PR #194] [MERGED] docs: add how-to for PGVectorStore
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#225 [PR #196] [MERGED] Update README.md
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#226 [PR #197] [MERGED] Update README.md
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#217 [PR #188] [MERGED] release 0.0.14rc1
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#218 [PR #189] [MERGED] lint: run linter
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#219 [PR #190] [MERGED] 0.0.14 release and remove deprecation for now
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#220 [PR #191] [CLOSED] docs: streamline tutotiral
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#221 [PR #192] [CLOSED] docs: tutorial re-work
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#212 [PR #183] [MERGED] chore: Update PGVectorstore quickstart
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#213 [PR #184] [MERGED] Update README.md
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#214 [PR #185] [MERGED] fix: remove string filters and parameterize filters
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#215 [PR #186] [MERGED] update docker-compose file
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#216 [PR #187] [MERGED] lint: remove a few unused imports
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#207 [PR #178] [MERGED] docs(migration): Add migration script
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#208 [PR #177] [MERGED] docs: update PGVectorStore quickstart
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#209 [PR #176] [MERGED] docs: refactor the readme
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#211 [PR #181] [MERGED] add missing imports to readme
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#202 [PR #171] [CLOSED] chore(docs): Add sample notebook and documentation for PGVectorStore
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#203 [PR #172] [MERGED] chore(docs): Add sample notebook and documentation for PGVectorStore
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#204 [PR #173] [MERGED] docs: update the readme to note Google provided integrations
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#205 [PR #174] [MERGED] fix: Add setter for Chat Message History messages
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#206 [PR #175] [MERGED] feat: Add the PGVectorStore
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#197 [PR #164] [MERGED] Bump version 0.0.13
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#198 [PR #167] [MERGED] Removed the definition of the duplicate index on the id column and re…
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#199 [PR #168] [MERGED] feat: Add the PGVectorStore class
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#200 [PR #169] [MERGED] chore: Add deprecation warning for PGVector
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#201 [PR #170] [CLOSED] chore(docs): Add sample notebook and documentation for PGVectorStore
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#192 [PR #157] [CLOSED] Dependencies: Update to pgvector 0.3
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#193 [PR #158] [MERGED] Documentation: Add CONTRIBUTING.md and DEVELOPMENT.md
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#194 [PR #161] [MERGED] Dependencies: Add greenlet package to test dependency group
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#195 [PR #162] [CLOSED] update poetry lock file
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#196 [PR #163] [MERGED] Dependencies: Update to pgvector <0.4
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#189 [PR #148] [MERGED] Drop 3.8 support from CI
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#190 [PR #149] [MERGED] drop python 3.8 from CI
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#191 [PR #155] [MERGED] Allow langchain-postgres to work with numpy 2.x
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#182 [PR #140] [MERGED] langchain-standard-tests -> langchain-tests
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#183 [PR #141] [MERGED] no more git dependencies
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#184 [PR #145] [MERGED] bump langchain-tests
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#179 [PR #137] [MERGED] infra: disable pypi release attestations
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#180 [PR #132] [CLOSED] docs: update the readme to note Google provided integrations
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#175 [PR #123] [MERGED] docs: fix PGVector import examples
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#169 [PR #107] [CLOSED] fix bug: collection name initialize in PGVector class
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#170 [PR #113] [MERGED] Update _release.yml
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#171 [PR #114] [MERGED] Update _release.yml
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#172 [PR #115] [MERGED] Relax constraints in poetry file and bump version to 0.0.11
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#173 [PR #117] [MERGED] Release 0.0.12
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#174 [PR #116] [MERGED] release 0.0.11
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#162 [PR #99] [MERGED] address issue for mmr calculation
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#163 [PR #97] [MERGED] fix: use self.embeddings.aembed_* in async methods
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#164 [PR #102] [CLOSED] Full text search
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#165 [PR #103] [CLOSED] Added possibility to add indexes and filter by full text search
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#166 [PR #105] [MERGED] infra: delete release (not _release)
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#167 [PR #112] [MERGED] patch: revert unreleased upsert change
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#159 [PR #90] [MERGED] Release 0.0.10
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#160 [PR #95] [MERGED] standardizing doc string
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#161 [PR #96] [CLOSED] fix: use self.embeddings.aembed_* in async methods
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#153 [PR #83] [MERGED] Implementation of upsert, aupsert, get_by_ids, aget_by_ids
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#154 [PR #79] [CLOSED] wip: test out interface addition
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#155 [PR #84] [CLOSED] Update PGVector community plugin to support uid, directory_id, source_id indexing and search
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#151 [PR #75] [MERGED] Add transalor
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#152 [PR #76] [MERGED] Release 0.0.9
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#144 [PR #67] [MERGED] add unit tests for $in and $nin operators
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#145 [PR #62] [MERGED] Add support for the Negation('$not') operator
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#147 [PR #69] [MERGED] Add $not operator to list of supported operator in pgvector doc-string
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#148 [PR #70] [MERGED] Release 0.0.7
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#149 [PR #72] [MERGED] small:Change python version
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#150 [PR #73] [MERGED] Release 0.0.8
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#140 [PR #57] [MERGED] Add URL to source code to pyproject.toml
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#142 [PR #64] [MERGED] Add async mode for pgvector (v2)
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#143 [PR #66] [MERGED] pgvector document filters
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#135 [PR #50] [CLOSED] updated postgresql checkpoint to include metadata.
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#136 [PR #51] [MERGED] vectorstore: Fix in exists operator. Was working as null
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#137 [PR #52] [MERGED] BREAKING: remove langgraph checkpointer
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#138 [PR #53] [MERGED] Release 0.0.6
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#139 [PR #54] [MERGED] Update README.md
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#129 [PR #29] [MERGED] Add security policy
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#130 [PR #32] [CLOSED] Add async mode for pgvector
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#131 [PR #40] [MERGED] vectorstore: Add support to filter by IS NULL and IS NOT NULL criteria
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#132 [PR #49] [CLOSED] postgres: relax langgraph dep
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#133 [PR #48] [MERGED] Release 0.0.5
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#134 [PR #44] [MERGED] loosen core dep to tolerate 0.2
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#124 [PR #23] [MERGED] Update README.md
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#125 [PR #24] [MERGED] Fix broken tests
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#126 [PR #25] [MERGED] Update session management in vectorstore
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#127 [PR #27] [MERGED] Should be using uuid4 not uuid1
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#128 [PR #28] [MERGED] relax depndencies
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#120 [PR #19] [MERGED] Move the star
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#121 [PR #20] [MERGED] Fix handling of connections
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#122 [PR #21] [MERGED] Update embeddings_function -> embeddings
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#123 [PR #22] [MERGED] Update documentation
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#112 [PR #11] [MERGED] Update API to use create_tables and drop_tables consistently
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#113 [PR #12] [MERGED] Rename postgres checkpointer to postgres saver
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#114 [PR #13] [MERGED] Add release workflow
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#115 [PR #14] [MERGED] Update interface to accept pools
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#116 [PR #15] [MERGED] Update README with langgraph examples
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#117 [PR #18] [MERGED] Remove deprecated code from vectorstore
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#118 [PR #17] [MERGED] Add notebook for vectorstore and update bug in add_documents
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#119 [PR #16] [MERGED] Add langgraph+langchain-postgres example
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#107 [PR #6] [MERGED] Update env variables
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#108 [PR #7] [MERGED] Another env variable fix
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#109 [PR #8] [MERGED] bump timeout
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#110 [PR #9] [MERGED] Update readme
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#111 [PR #10] [MERGED] Some clean up
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#103 [PR #2] [MERGED] Set up CI
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#104 [PR #3] [MERGED] Mvoe integration tests to unit tests
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#105 [PR #4] [MERGED] Fix import in unit tests
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#106 [PR #5] [MERGED] Add docker-compose file
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#102 [PR #1] [MERGED] Update poetry file
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#96 update a langchain-postgres alpha 1.0.0a1 for langchain 1.0.0 alpha version
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#99 Support metadata-based filtering for delete operations
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#100 Bug: areindex and adrop_vector_index in AsyncPGVectorStore ignore the specified schema
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#89 Add support for pgvectorscale diskann index
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#91 AsyncPGVectorStore Metadata Filtering Not Working
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#92 support langchain-core==1.0.0
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#87 PostgresChatMessageHistory is not working with UTF8 character
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#88 [BUG] Wrong database type checking for embedding_column in PGVectorStore.create
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#80 [Documentation] Indicate dense vs sparse search in HybridSearchConfig
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#81 [BUG] Improvements in HybridSearchConfig — Modifications in Score Fusion Logic and Configuration
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#82 TypeError: Object of type HumanMessage is not JSON serializable
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#83 Expose aapply_hybrid_search_index in PGVectorStore
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#77 BlockingError(func_name) when using engine = PGEngine.from_connection_string(url=connection_string)
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#78 VectorStore search filters doesn't support multiple $like/$ilike/$in/$nin on same column
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#74 [bug] IntegrityError When Adding Texts to Vector Store with Metadata
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#75 Wrong async position
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#76 Does PGVector really need SQLAlchemy URLs? If so, why not psycopg3?
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#69 What is the purpose of the chat_message_histories.py file?
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#70 Package maintenance 2025-02
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#72 issues while running quickstart for pgvector
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#73 Incompatible with latest langchain-community version due to numpy dependency
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#66 Update dependencies to use/permit pgvector 0.3
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#57 Support newer versions of pgvector
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#47 Why should session_id be a valid UUID?
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#45 Release 0.0.9 missing upsert() (and aupsert()) methods for PGVector object
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#42 Bug: TypeError: argument 1 must be a string or unicode object: got Composed instead
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#37 PostgresSaver Implementation
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#38 Was 0.0.10 supposed to be released?
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#39 Async Retriever Error with SQLAlchemy - "cannot insert multiple commands into a prepared statement"
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#34 upgrading from 0.0.6 -> 0.0.9, getting _async_engine not found
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#36 psycopg module version error
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#32 Lacking CONTRIBUTING.MD
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#28 AsyncEngine error: using pgvector to embedding -- cannot insert multiple commands into a prepared statement [SQL: SELECT pg_advisory_xact_lock(1573678846307946496);CREATE EXTENSION IF NOT EXISTS vector
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#20 hybrid search
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#21 object has no attribute "embed_documents"
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#16 Could you clarify why the "contains" operator is not implemented?
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#11 Error while upgrading psycopg2 to psycopg with "from langchain_postgres import PGVector" and "langchain_postgres.vectorstores import PGVector"
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#12 Poetry Conflict: Importing Langchain-Postgres v^0.0.3 (current) + LangGraph v^0.0.48 (current)
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#13 Attribute Error raised when using "$nin" operator in filter
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#5 relation "langchain_pg_collection" does not exist
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#7 Error while trying to import psycopg with poetry
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#2 Error during retrieval
276 Issues created by 1 user
Opened
#1 Error while indexing
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#2 Error during retrieval
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#3 Potential solutions for being able to index different vector sizes?
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#4 CREATE EXTENSION fails with Azure Cosmos DB for PostgreSQL
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#5 relation "langchain_pg_collection" does not exist
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#6 metadata equality filter loss of performance
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#7 Error while trying to import psycopg with poetry
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#8 PostgresChatMessageHistory API break the usage of LCEL and Langserv
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#9 create a mechanism to migrate from community vectorstore to this implementation
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#10 Implementation Suggestion: for creating connection string from db params method
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#11 Error while upgrading psycopg2 to psycopg with "from langchain_postgres import PGVector" and "langchain_postgres.vectorstores import PGVector"
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#12 Poetry Conflict: Importing Langchain-Postgres v^0.0.3 (current) + LangGraph v^0.0.48 (current)
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#13 Attribute Error raised when using "$nin" operator in filter
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#14 Feature Request: ConversationBufferWindowMemory
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#15 Connection error use azure embedding
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#16 Could you clarify why the "contains" operator is not implemented?
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#17 Nested Metadata filtering broken
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#18 ChatMessageHistory does throw error after upgrading, neither sync nor async connection works
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#19 langchain-postgres on conda-forge
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#20 hybrid search
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#21 object has no attribute "embed_documents"
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#22 Support for the sparse embeddings
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#23 Support array comparisons
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#24 Add benchmarking
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#25 PGVector with Agents for querying a DB
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#26 Support for LangGraph checkpointer
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#27 Support for pgvector 0.3.x
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#28 AsyncEngine error: using pgvector to embedding -- cannot insert multiple commands into a prepared statement [SQL: SELECT pg_advisory_xact_lock(1573678846307946496);CREATE EXTENSION IF NOT EXISTS vector
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#29 How to query CollectionStore and EmbeddingStore models directly in a clean way?
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#30 $contain comperator not working with SelfQueryRetriever
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#31 feat: add IVFFlat index functionality to PGVector
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#32 Lacking CONTRIBUTING.MD
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#33 Rows returned from similarity_search with filter less than expected
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#34 upgrading from 0.0.6 -> 0.0.9, getting _async_engine not found
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#35 Feature Request: Support for Read-Only Endpoints in PG Vector Vector Store
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#36 psycopg module version error
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#37 PostgresSaver Implementation
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#38 Was 0.0.10 supposed to be released?
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#39 Async Retriever Error with SQLAlchemy - "cannot insert multiple commands into a prepared statement"
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#40 Filtering on nested metadata not allowed
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#41 pgvector - (psycopg.DataError) PostgreSQL text fields cannot contain NUL (0x00) bytes
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#42 Bug: TypeError: argument 1 must be a string or unicode object: got Composed instead
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#43 langchain v0.3 mentioned langchain-postgres==0.0.13
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#44 ValidationError: 1 validation error for Document metadata Input should be a valid dictionary
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#45 Release 0.0.9 missing upsert() (and aupsert()) methods for PGVector object
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#46 Metadata field not properly deserialized when using async_mode=True with PGVector
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#47 Why should session_id be a valid UUID?
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#48 How to use PostgresChatMessageHistory with async connections when using RunnableWithMessageHistory?
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#49 Feature Request: Support Deleting Vectors by Metadata in PGVector Class
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#50 Add Support for Asynchronous Connection Pooling in PostgresChatMessageHistory
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#51 Engine object is not being properly disposed in PGVector
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#52 delete_collection() Does Not Remove Records from upsertion_record Table
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#53 kwargs chain is broken in PGVector's search methods
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#54 Provide a way to override query building logic
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#55 Allow same id for different collections
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#56 Input text/embedding/metadata list length validation is missing
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#57 Support newer versions of pgvector
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#58 Array inclusion filter operation
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#59 any documentation for migration from old PGVector to the new one?
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#60 Ability to create more than a single embedding table per collection rather than single embedding table for all colleciton
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#61 any documentation for migration from old PGVector to the new one?
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#62 'PGVector' has no attribute 'acreate'
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#63 PGVector / Postgres connection is not automatically closed, and remains idle
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#64 Use Message ID for ID column
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#65 filter with $like
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#66 Update dependencies to use/permit pgvector 0.3
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#67 Outdated Documentation for langchain_postgres.checkpoint.PostgresSaver
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#68 Store initialization race condition - Table 'langchain_pg_collection' is already defined for this MetaData instance
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#69 What is the purpose of the chat_message_histories.py file?
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#70 Package maintenance 2025-02
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#71 Correct usage
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#72 issues while running quickstart for pgvector
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#73 Incompatible with latest langchain-community version due to numpy dependency
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#74 [bug] IntegrityError When Adding Texts to Vector Store with Metadata
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#75 Wrong async position
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#76 Does PGVector really need SQLAlchemy URLs? If so, why not psycopg3?
Opened
#77 BlockingError(func_name) when using engine = PGEngine.from_connection_string(url=connection_string)
Opened
#78 VectorStore search filters doesn't support multiple $like/$ilike/$in/$nin on same column
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#79 adelete does not delete embeddings
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#80 [Documentation] Indicate dense vs sparse search in HybridSearchConfig
Opened
#81 [BUG] Improvements in HybridSearchConfig — Modifications in Score Fusion Logic and Configuration
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#82 TypeError: Object of type HumanMessage is not JSON serializable
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#83 Expose aapply_hybrid_search_index in PGVectorStore
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#84 [PGVector] Unnecessary columns queried leads to high latency
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#85 Suggestion: init_vectorstore_table() should also create the schema
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#86 PGVectorStore fails with GoogleGenerativeAIEmbeddings
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#87 PostgresChatMessageHistory is not working with UTF8 character
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#88 [BUG] Wrong database type checking for embedding_column in PGVectorStore.create
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#89 Add support for pgvectorscale diskann index
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#90 Add Question-Level Caching to LangChain for RAG Pipelines
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#91 AsyncPGVectorStore Metadata Filtering Not Working
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#92 support langchain-core==1.0.0
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#93 PGVectorStore faild with AzureAIEmbeddingsModel (Document objects could not be iterable)
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#94 Updating reference docs for new site
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#95 support VectorChord (postgresql)
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#96 update a langchain-postgres alpha 1.0.0a1 for langchain 1.0.0 alpha version
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#97 Separate tables for collections and embeddings in PGVectorStore
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#98 How to use non-async PGEngine?
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#99 Support metadata-based filtering for delete operations
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#100 Bug: areindex and adrop_vector_index in AsyncPGVectorStore ignore the specified schema
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#101 AsyncPGVectorStore.as_retriever filter in search_kwargs is not translated to target langchain_metadata column
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#102 [PR #1] [MERGED] Update poetry file
Opened
#103 [PR #2] [MERGED] Set up CI
Opened
#104 [PR #3] [MERGED] Mvoe integration tests to unit tests
Opened
#105 [PR #4] [MERGED] Fix import in unit tests
Opened
#106 [PR #5] [MERGED] Add docker-compose file
Opened
#107 [PR #6] [MERGED] Update env variables
Opened
#108 [PR #7] [MERGED] Another env variable fix
Opened
#109 [PR #8] [MERGED] bump timeout
Opened
#110 [PR #9] [MERGED] Update readme
Opened
#111 [PR #10] [MERGED] Some clean up
Opened
#112 [PR #11] [MERGED] Update API to use create_tables and drop_tables consistently
Opened
#113 [PR #12] [MERGED] Rename postgres checkpointer to postgres saver
Opened
#114 [PR #13] [MERGED] Add release workflow
Opened
#115 [PR #14] [MERGED] Update interface to accept pools
Opened
#116 [PR #15] [MERGED] Update README with langgraph examples
Opened
#117 [PR #18] [MERGED] Remove deprecated code from vectorstore
Opened
#118 [PR #17] [MERGED] Add notebook for vectorstore and update bug in add_documents
Opened
#119 [PR #16] [MERGED] Add langgraph+langchain-postgres example
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#120 [PR #19] [MERGED] Move the star
Opened
#121 [PR #20] [MERGED] Fix handling of connections
Opened
#122 [PR #21] [MERGED] Update embeddings_function -> embeddings
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#123 [PR #22] [MERGED] Update documentation
Opened
#124 [PR #23] [MERGED] Update README.md
Opened
#125 [PR #24] [MERGED] Fix broken tests
Opened
#126 [PR #25] [MERGED] Update session management in vectorstore
Opened
#127 [PR #27] [MERGED] Should be using uuid4 not uuid1
Opened
#128 [PR #28] [MERGED] relax depndencies
Opened
#129 [PR #29] [MERGED] Add security policy
Opened
#130 [PR #32] [CLOSED] Add async mode for pgvector
Opened
#131 [PR #40] [MERGED] vectorstore: Add support to filter by IS NULL and IS NOT NULL criteria
Opened
#132 [PR #49] [CLOSED] postgres: relax langgraph dep
Opened
#133 [PR #48] [MERGED] Release 0.0.5
Opened
#134 [PR #44] [MERGED] loosen core dep to tolerate 0.2
Opened
#135 [PR #50] [CLOSED] updated postgresql checkpoint to include metadata.
Opened
#136 [PR #51] [MERGED] vectorstore: Fix in exists operator. Was working as null
Opened
#137 [PR #52] [MERGED] BREAKING: remove langgraph checkpointer
Opened
#138 [PR #53] [MERGED] Release 0.0.6
Opened
#139 [PR #54] [MERGED] Update README.md
Opened
#140 [PR #57] [MERGED] Add URL to source code to pyproject.toml
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#141 [PR #59] Support for jsonb array comparision for $in $nin operator
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#142 [PR #64] [MERGED] Add async mode for pgvector (v2)
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#143 [PR #66] [MERGED] pgvector document filters
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#144 [PR #67] [MERGED] add unit tests for $in and $nin operators
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#145 [PR #62] [MERGED] Add support for the Negation('$not') operator
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#146 [PR #60] Fix transactions not being committed
Opened
#147 [PR #69] [MERGED] Add $not operator to list of supported operator in pgvector doc-string
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#148 [PR #70] [MERGED] Release 0.0.7
Opened
#149 [PR #72] [MERGED] small:Change python version
Opened
#150 [PR #73] [MERGED] Release 0.0.8
Opened
#151 [PR #75] [MERGED] Add transalor
Opened
#152 [PR #76] [MERGED] Release 0.0.9
Opened
#153 [PR #83] [MERGED] Implementation of upsert, aupsert, get_by_ids, aget_by_ids
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#154 [PR #79] [CLOSED] wip: test out interface addition
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#155 [PR #84] [CLOSED] Update PGVector community plugin to support uid, directory_id, source_id indexing and search
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#156 [PR #77] Support for jsonb array comparision for $in $nin operator
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#157 [PR #91] Add support for HNSW and IVFFlat indexes, add tests
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#158 [PR #85] feat: add hnsw index functionality to PGVector
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#159 [PR #90] [MERGED] Release 0.0.10
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#160 [PR #95] [MERGED] standardizing doc string
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#161 [PR #96] [CLOSED] fix: use self.embeddings.aembed_* in async methods
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#162 [PR #99] [MERGED] address issue for mmr calculation
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#163 [PR #97] [MERGED] fix: use self.embeddings.aembed_* in async methods
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#164 [PR #102] [CLOSED] Full text search
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#165 [PR #103] [CLOSED] Added possibility to add indexes and filter by full text search
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#166 [PR #105] [MERGED] infra: delete release (not _release)
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#167 [PR #112] [MERGED] patch: revert unreleased upsert change
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#168 [PR #106] [feat]allow user to specify collection & embedding table names
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#169 [PR #107] [CLOSED] fix bug: collection name initialize in PGVector class
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#170 [PR #113] [MERGED] Update _release.yml
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#171 [PR #114] [MERGED] Update _release.yml
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#172 [PR #115] [MERGED] Relax constraints in poetry file and bump version to 0.0.11
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#173 [PR #117] [MERGED] Release 0.0.12
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#174 [PR #116] [MERGED] release 0.0.11
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#175 [PR #123] [MERGED] docs: fix PGVector import examples
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#176 [PR #119] feat: retrieve embeddings from database only when necessary
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#177 [PR #128] Enable Deletion of Vectors by Metadata in PGVector
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#178 [PR #130] Add Asynchronous Connection Pooling Support to PostgresChatMessageHistory
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#179 [PR #137] [MERGED] infra: disable pypi release attestations
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#180 [PR #132] [CLOSED] docs: update the readme to note Google provided integrations
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#181 [PR #125] Fix metadata deserialization in async mode for PGVector
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#182 [PR #140] [MERGED] langchain-standard-tests -> langchain-tests
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#183 [PR #141] [MERGED] no more git dependencies
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#184 [PR #145] [MERGED] bump langchain-tests
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#185 [PR #144] added a method to update session id in PostgresChatMessageHistory
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#186 [PR #138] Add support to specify custom table schema
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#187 [PR #147] Added latest PGVector features
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#188 [PR #146] add a new operator for array inclusion filtering
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#189 [PR #148] [MERGED] Drop 3.8 support from CI
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#190 [PR #149] [MERGED] drop python 3.8 from CI
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#191 [PR #155] [MERGED] Allow langchain-postgres to work with numpy 2.x
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#192 [PR #157] [CLOSED] Dependencies: Update to pgvector 0.3
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#193 [PR #158] [MERGED] Documentation: Add CONTRIBUTING.md and DEVELOPMENT.md
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#194 [PR #161] [MERGED] Dependencies: Add greenlet package to test dependency group
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#195 [PR #162] [CLOSED] update poetry lock file
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#196 [PR #163] [MERGED] Dependencies: Update to pgvector <0.4
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#197 [PR #164] [MERGED] Bump version 0.0.13
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#198 [PR #167] [MERGED] Removed the definition of the duplicate index on the id column and re…
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#199 [PR #168] [MERGED] feat: Add the PGVectorStore class
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#200 [PR #169] [MERGED] chore: Add deprecation warning for PGVector
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#201 [PR #170] [CLOSED] chore(docs): Add sample notebook and documentation for PGVectorStore
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#202 [PR #171] [CLOSED] chore(docs): Add sample notebook and documentation for PGVectorStore
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#203 [PR #172] [MERGED] chore(docs): Add sample notebook and documentation for PGVectorStore
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#204 [PR #173] [MERGED] docs: update the readme to note Google provided integrations
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#205 [PR #174] [MERGED] fix: Add setter for Chat Message History messages
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#206 [PR #175] [MERGED] feat: Add the PGVectorStore
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#207 [PR #178] [MERGED] docs(migration): Add migration script
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#208 [PR #177] [MERGED] docs: update PGVectorStore quickstart
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#209 [PR #176] [MERGED] docs: refactor the readme
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#210 [PR #179] refactor: vectorstores & chat_message_histories
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#211 [PR #181] [MERGED] add missing imports to readme
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#212 [PR #183] [MERGED] chore: Update PGVectorstore quickstart
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#213 [PR #184] [MERGED] Update README.md
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#214 [PR #185] [MERGED] fix: remove string filters and parameterize filters
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#215 [PR #186] [MERGED] update docker-compose file
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#216 [PR #187] [MERGED] lint: remove a few unused imports
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#217 [PR #188] [MERGED] release 0.0.14rc1
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#218 [PR #189] [MERGED] lint: run linter
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#219 [PR #190] [MERGED] 0.0.14 release and remove deprecation for now
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#220 [PR #191] [CLOSED] docs: streamline tutotiral
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#221 [PR #192] [CLOSED] docs: tutorial re-work
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#222 [PR #193] [MERGED] docs: partial tutorial rework
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#223 [PR #195] [MERGED] feat: add drop table
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#224 [PR #194] [MERGED] docs: add how-to for PGVectorStore
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#225 [PR #196] [MERGED] Update README.md
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#226 [PR #197] [MERGED] Update README.md
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#227 [PR #199] [MERGED] docs: update tutorial
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#228 [PR #198] [MERGED] Update README.md
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#229 [PR #201] [MERGED] chore: Update vectorstore search to support inline embedding
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#230 [PR #200] [MERGED] chore(docs): Add an Async Explainer doc
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#231 [PR #203] [CLOSED] feat: Adding PGChatMessageHistory
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#232 [PR #206] [CLOSED] chore: Make the private variable __vs to semi private
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#233 [PR #204] feature/hybrid-search
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#234 [PR #207] [CLOSED] feat: Adding multi modal support for PGVectorStore
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#235 [PR #205] [MERGED] Update README.md
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#236 [PR #208] [MERGED] fix(deps): Allow Numpy 2.x to fix dependencies resolution on Python 3.13
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#237 [PR #211] [MERGED] feat: Added Hybrid Search Config and Tests [1/N]
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#238 [PR #210] [MERGED] fix: Add support for a metadata column named id in PGVectorStore
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#239 [PR #212] [MERGED] ci: migrate to uv
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#240 [PR #217] [MERGED] Fixed support for VectorStore search filters with multiple $like/$ilike/$in/$nin on same column
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#241 [PR #209] Fix: Table 'langchain_pg_collection' is already defined for this MetaData instance
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#242 [PR #221] [MERGED] Release 0.0.15
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#243 [PR #218] [MERGED] Remove wrong async
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#244 [PR #219] [CLOSED] fix: remove async for sync method
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#245 [PR #222] [CLOSED] Fixed the bug of reindex and drop_index when specifying the schema
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#246 [PR #223] [MERGED] deps: add missing dependencies in test group
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#247 [PR #224] docs,chore: improve development documentation and fix tooling
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#248 [PR #228] feat: $contains_any and $contains_none operators for array-inclusion filtering
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#249 [PR #227] feat: support for DiskANN index
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#250 [PR #229] [CLOSED] fix: Use JSONB for metadata column instead of JSON
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#251 [PR #226] feat: support for Halfvec and Sparsevec vector types
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#252 [PR #230] [CLOSED] fix: Use JSONB for metadata column instead of JSON
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#253 [PR #231] [CLOSED] Feature: Add Document Retrieval with Metadata Filtering
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#254 [PR #233] [CLOSED] chore: add documentation for Hybrid Seach
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#255 [PR #239] [CLOSED] fix: PGVector --> PGVectorStore: migration fails for a custom db schema
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#256 [PR #242] [CLOSED] Fix/custom db schema
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#257 [PR #244] [MERGED] feat: add async and sync hybrid search index creation methods
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#258 [PR #245] [MERGED] docs: Add documentation for Hybrid Search
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#259 [PR #243] [MERGED] fix : correct type checking against db column for embedding_column variable
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#260 [PR #246] chore: Add deprecation warning for PGVector
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#261 [PR #251] [MERGED] chore: update PGVectorStore How to guide
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#262 [PR #256] [MERGED] fix: Normalize scores in RRF ranking in hybrid search
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#263 [PR #255] [MERGED] fix: Normalize results in wighted sum ranking
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#264 [PR #257] [MERGED] fix: Fix hybrid search bugs
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#265 [PR #254] [MERGED] chore: Add psycopg binary as a dependency
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#266 [PR #260] [MERGED] fix(docs): update command to install packages using uv & update port …
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#267 [PR #264] [MERGED] Feature: Add Document Retrieval with Metadata Filtering similar to Chroma Vector Store
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#268 [PR #261] [MERGED] Metadata json filtering
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#269 [PR #263] [MERGED] release: 0.0.16
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#270 [PR #267] [MERGED] Fix incorrect connection string format in README.md example
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#271 [PR #268] fix: tsquery only returns results if all keywords match
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#272 [PR #270] [MERGED] fix: reindex&drop_index without schema
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#273 [PR #272] [MERGED] Feature: Support metadata based filtering for delete operations
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#274 [PR #274] chore: Fix CVE-2025-68664
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#275 [PR #273] chore: add deprecation warning to PGVector
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#276 [PR #277] feat: timestamped chat history with session tracking