checkpointpostgres==2.0.0

langgraph-checkpoint-postgres 2.0.0

Summary of Changes

• Removed PostgreSQL ltree extension dependency: Now using standard text columns with LIKE queries instead of specialized ltree type, improving compatibility with PostgreSQL instances (PR #1948)
• Fixed search operations: Corrected namespace handling in both sync and async store implementations (PR #1935)
• Enhanced namespace processing: Improved handling of different data types and patterns for namespaces (PR #1948)
• Upgraded dependency: Now depends on langgraph-checkpoint 2.0.0

Detailed Changes

langgraph.store.postgres.base.BasePostgresStore

• Removed requirement for PostgreSQL ltree extension (PR #1948)
• Changed prefix column type from ltree to text (PR #1948)
• Updated database index from gist to btree with text_pattern_ops for prefix lookups (PR #1948)
• Replaced ltree-specific namespace queries with standard SQL LIKE queries (PR #1948)
• Improved handling of wildcard patterns in namespaces (PR #1948)

langgraph.store.postgres.base.PostgresStore

• Fixed search operations to correctly handle namespace prefixes (PR #1935)
• Enhanced namespace decoding with the new _decode_ns_bytes utility function (PR #1935)

langgraph.store.postgres.aio.AsyncPostgresStore

• Fixed search operations to correctly handle namespace prefixes (PR #1935)
• Enhanced namespace decoding with the new _decode_ns_bytes utility function (PR #1935)

langgraph.store.postgres.base.Row

• Updated type definition to use string for prefix instead of bytes (PR #1948)