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Title: langgraph.store.postgres | LangChain Reference

Open Graph Title: langgraph.store.postgres

X Title: langgraph.store.postgres

Description: Python API reference for langgraph.store.postgres. Part of the LangChain ecosystem.

Open Graph Description: Python API reference for langgraph.store.postgres. Part of the LangChain ecosystem.

X Description: Python API reference for langgraph.store.postgres. Part of the LangChain ecosystem.

Opengraph URL: https://reference.langchain.com/python/langgraph.store.postgres

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Links:

LangChain Reference home pagehttps://reference.langchain.com/
GitHubhttps://github.com/langchain-ai
Main Docshttps://docs.langchain.com/oss/python/langgraph
Deep Agentshttps://reference.langchain.com/python/deepagents
LangChainhttps://reference.langchain.com/python/langchain/overview
LangGraphhttps://reference.langchain.com/python/langgraph/overview
Integrationshttps://reference.langchain.com/python/integrations/overview
LangSmithhttps://reference.langchain.com/python/langsmith
Overviewhttps://reference.langchain.com/python/langgraph/overview
LangGraph Checkpointhttps://reference.langchain.com/python/langgraph.checkpoint
LangGraph Storehttps://reference.langchain.com/python/langgraph.store
Checkpoint Postgreshttps://reference.langchain.com/python/langgraph.checkpoint.postgres
Store Postgreshttps://reference.langchain.com/python/langgraph.store.postgres
Checkpoint SQLitehttps://reference.langchain.com/python/langgraph.checkpoint.sqlite
LangGraph Prebuilthttps://reference.langchain.com/python/langgraph.prebuilt
LangGraph CLIhttps://reference.langchain.com/python/langgraph-cli
LangGraph SDKhttps://reference.langchain.com/python/langgraph-sdk
LangGraph Supervisorhttps://reference.langchain.com/python/langgraph-supervisor
LangGraph Swarmhttps://reference.langchain.com/python/langgraph-swarm
https://chat.langchain.com/
LangGraph Checkpointhttps://reference.langchain.com/python/langgraph.checkpoint
LangGraph Storehttps://reference.langchain.com/python/langgraph.store
Checkpoint Postgreshttps://reference.langchain.com/python/langgraph.checkpoint.postgres
Store Postgreshttps://reference.langchain.com/python/langgraph.store.postgres
Checkpoint SQLitehttps://reference.langchain.com/python/langgraph.checkpoint.sqlite
LangGraph Prebuilthttps://reference.langchain.com/python/langgraph.prebuilt
LangGraph CLIhttps://reference.langchain.com/python/langgraph-cli
LangGraph SDKhttps://reference.langchain.com/python/langgraph-sdk
LangGraph Supervisorhttps://reference.langchain.com/python/langgraph-supervisor
LangGraph Swarmhttps://reference.langchain.com/python/langgraph-swarm
https://pypi.org/project/langgraph-checkpoint-postgres/#history
https://opensource.org/licenses/MIT
https://pypistats.org/packages/langgraph-checkpoint-postgres
https://x.com/langchain_oss
LangSmithhttps://www.langchain.com/langsmith
LangSmithhttps://www.langchain.com/langsmith
Psycopg installation docshttps://www.psycopg.org/psycopg3/docs/basic/install.html
API referencehttps://reference.langchain.com/python/langgraph.checkpoint.postgres
LangGraph Docshttps://docs.langchain.com/oss/python/langgraph/overview
langgraph-checkpoint READMEhttps://github.com/langchain-ai/langgraph/tree/main/libs/checkpoint#serde
how-to guidehttps://langchain-ai.github.io/langgraph/how-tos/persistence_postgres/
Releaseshttps://docs.langchain.com/oss/python/release-policy
Versioninghttps://docs.langchain.com/oss/python/versioning
Contributing Guidehttps://docs.langchain.com/oss/python/contributing/overview
ClassMigrationA database migration with optional conditions and parameters.https://reference.langchain.com/python/langgraph.store.postgres/base/Migration
ClassPoolConfigConnection pool settings for PostgreSQL connections. Controls connection lifecycle and resource utilization: Small pools (1-5) suit low-concurrency workloads Larger pools handle concurrent reque https://reference.langchain.com/python/langgraph.store.postgres/base/PoolConfig
ClassANNIndexConfigConfiguration for vector index in PostgreSQL store.https://reference.langchain.com/python/langgraph.store.postgres/base/ANNIndexConfig
ClassHNSWConfigConfiguration for HNSW (Hierarchical Navigable Small World) index.https://reference.langchain.com/python/langgraph.store.postgres/base/HNSWConfig
ClassIVFFlatConfigIVFFlat index divides vectors into lists, and then searches a subset of those lists that are closest to the query vector. It has faster build times and uses less memory than HNSW, but has lower queryhttps://reference.langchain.com/python/langgraph.store.postgres/base/IVFFlatConfig
ClassPostgresIndexConfigConfiguration for vector embeddings in PostgreSQL store with pgvector-specific options. Extends EmbeddingConfig with additional configuration for pgvector index and vector types.https://reference.langchain.com/python/langgraph.store.postgres/base/PostgresIndexConfig
ClassBasePostgresStorehttps://reference.langchain.com/python/langgraph.store.postgres/base/BasePostgresStore
ClassPostgresStorePostgres-backed store with optional vector search using pgvector. Basic setup and usage: from langgraph.store.postgres import PostgresStore from psyco https://reference.langchain.com/python/langgraph.store.postgres/base/PostgresStore
ClassRowhttps://reference.langchain.com/python/langgraph.store.postgres/base/Row
ClassAsyncPostgresStoreAsynchronous Postgres-backed store with optional vector search using pgvector. Basic setup and usage: from langgraph.store.postgres import AsyncPostgresSt https://reference.langchain.com/python/langgraph.store.postgres/aio/AsyncPostgresStore
Functionget_distance_operatorGet the distance operator and score expression based on config.https://reference.langchain.com/python/langgraph.store.postgres/base/get_distance_operator
Modulepostgreshttps://reference.langchain.com/python/langgraph.store.postgres
Modulebasehttps://reference.langchain.com/python/langgraph.store.postgres/base
Moduleaiohttps://reference.langchain.com/python/langgraph.store.postgres/aio

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