whpg-vector release notes

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The whpg-vector documentation describes the latest version, including minor releases and patches. These release notes cover what's new in each release.

0.7.4

Release date: September 20, 2026

  • Fixed locking for parallel HNSW index builds.
  • Fixed compilation error with GCC 14 on i386 when SSE2 is not enabled.

0.7.3

  • Fixed failed to add index item error with sparsevec.
  • Fixed compilation error with FreeBSD ARM.
  • Fixed compilation warning with MSVC and Postgres 16.

0.7.2

  • Fixed initialization fork for indexes on unlogged tables.

0.7.1

  • Improved performance of on-disk HNSW index builds.
  • Fixed undefined symbol error with GCC 8.
  • Fixed compilation error with universal binaries on Mac.
  • Fixed compilation warning with Clang < 14.

0.7.0

  • Added halfvec type.
  • Added sparsevec type.
  • Added support for indexing bit type.
  • Added support for indexing L1 distance with HNSW.
  • Added binary_quantize function.
  • Added hamming_distance function.
  • Added jaccard_distance function.
  • Added l2_normalize function.
  • Added subvector function.
  • Added concatenate operator for vectors.
  • Added CPU dispatching for distance functions on Linux x86-64.
  • Updated comparison operators to support vectors with different dimensions.

0.6.2

  • Reduced lock contention with parallel HNSW index builds.

0.6.1

  • Fixed error with ANALYZE and vectors with different dimensions.
  • Fixed segmentation fault with shared_preload_libraries.
  • Fixed vector subtraction being marked as commutative.

0.6.0

If upgrading with Postgres 12 or Docker, see the upgrade notes in the pgvector repository.

  • Added support for parallel index builds for HNSW.
  • Added validation for GUC parameters.
  • Changed storage for vector from extended to external.
  • Improved performance of HNSW.
  • Reduced memory usage for HNSW index builds.
  • Reduced WAL generation for HNSW index builds.
  • Fixed error with logical replication.
  • Fixed invalid memory alloc request size error with HNSW index builds.
  • Moved Docker image to pgvector org.
  • Added Docker tags for each supported version of Postgres.
  • Dropped support for Postgres 11.

0.5.1

  • Improved performance of HNSW index builds.
  • Added check for MVCC-compliant snapshot for index scans.

0.5.0

  • Added HNSW index type.
  • Added support for parallel index builds for IVFFlat.
  • Added l1_distance function.
  • Added element-wise multiplication for vectors.
  • Added sum aggregate.
  • Improved performance of distance functions.
  • Fixed out of range results for cosine distance.
  • Fixed results for NULL and NaN distances for IVFFlat.

0.4.4

  • Improved error message for malformed vector literal.
  • Fixed segmentation fault with text input.
  • Fixed consecutive delimiters with text input.

0.4.3

  • Improved cost estimation.
  • Improved support for spaces with text input.
  • Fixed infinite and NaN values with binary input.
  • Fixed infinite values with vector addition and subtraction.
  • Fixed infinite values with list centers.
  • Fixed compilation error when float8 is pass by reference.
  • Fixed compilation error on PowerPC.
  • Fixed segmentation fault with index creation on i386.

0.4.2

  • Added notice when index created with little data.
  • Fixed dimensions check for some direct function calls.
  • Fixed installation error with Postgres 12.0-12.2.

0.4.1

  • Improved performance of cosine distance.
  • Fixed index scan count.

0.4.0

If upgrading with Postgres < 13, see the upgrade note in the pgvector repository.

  • Changed text representation for vector elements to match real.
  • Changed storage for vector from plain to extended.
  • Increased max dimensions for vector from 1024 to 16000.
  • Increased max dimensions for index from 1024 to 2000.
  • Improved accuracy of text parsing for certain inputs.
  • Added avg aggregate for vector.
  • Added experimental support for Windows.
  • Dropped support for Postgres 10.

0.3.2

  • Fixed invalid memory alloc request size error.

0.3.1

If upgrading from 0.2.7 or 0.3.0, recreate all ivfflat indexes after upgrading to ensure all data is indexed.

  • Fixed issue with inserts silently corrupting ivfflat indexes (introduced in 0.2.7).
  • Fixed segmentation fault with index creation when lists > 6500.

0.3.0

  • Added support for Postgres 15.
  • Dropped support for Postgres 9.6.

0.2.7

  • Fixed unexpected data beyond EOF error.

0.2.6

  • Improved performance of index creation for Postgres < 12.

0.2.5

  • Reduced memory usage during index creation.
  • Fixed index creation exceeding maintenance_work_mem.
  • Fixed error with index creation when lists > 1600.

0.2.4

  • Added support for parallel vacuum.
  • Fixed issue with index not reusing space.

0.2.3

  • Added indexing progress for Postgres 12+.
  • Improved interrupt handling during index creation.

0.2.2

  • Fixed compilation error on Mac ARM.

0.2.1

  • Fixed operator is not unique error.

0.2.0

  • Added support for Postgres 14.

0.1.8

  • Added cast for vector to real[].

0.1.7

  • Added cast for numeric[] to vector.

0.1.6

  • Fixed segmentation fault with COUNT.

0.1.5

  • Reduced memory usage during index creation.

0.1.4

  • Fixed kmeans for inner product.
  • Fixed multiple definition error with GCC 10.

0.1.3

  • Added Dockerfile.
  • Fixed version.

0.1.2

  • Vectorized distance calculations.
  • Improved cost estimation.

0.1.1

  • Added binary representation for COPY.
  • Marked functions as PARALLEL SAFE.

0.1.0

  • First release.

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