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https://github.com/pgvector/pgvector.git
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Compare commits
23 Commits
v0.8.0
...
windows-ar
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13
.github/workflows/build.yml
vendored
13
.github/workflows/build.yml
vendored
@@ -46,8 +46,8 @@ jobs:
|
||||
fail-fast: false
|
||||
matrix:
|
||||
include:
|
||||
- postgres: 16
|
||||
os: macos-14
|
||||
- postgres: 17
|
||||
os: macos-15
|
||||
- postgres: 14
|
||||
os: macos-13
|
||||
steps:
|
||||
@@ -70,12 +70,13 @@ jobs:
|
||||
tar xf $TAG.tar.gz
|
||||
mv postgres-$TAG postgres
|
||||
env:
|
||||
TAG: ${{ matrix.postgres == 16 && 'REL_16_2' || 'REL_14_11' }}
|
||||
TAG: ${{ matrix.postgres == 17 && 'REL_17_2' || 'REL_14_15' }}
|
||||
- run: make prove_installcheck PROVE_FLAGS="-I ./postgres/src/test/perl -I ./test/perl"
|
||||
env:
|
||||
PERL5LIB: /Users/runner/perl5/lib/perl5
|
||||
- run: make clean && $(brew --prefix llvm@15)/bin/scan-build --status-bugs make
|
||||
- run: make clean && $(brew --prefix llvm@$LLVM_VERSION)/bin/scan-build --status-bugs make
|
||||
env:
|
||||
LLVM_VERSION: ${{ matrix.os == 'macos-15' && 18 || 15 }}
|
||||
PG_CFLAGS: -DUSE_ASSERT_CHECKING
|
||||
windows:
|
||||
runs-on: windows-latest
|
||||
@@ -86,7 +87,7 @@ jobs:
|
||||
with:
|
||||
postgres-version: 14
|
||||
- run: |
|
||||
call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat" && ^
|
||||
call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars32.bat" && ^
|
||||
nmake /NOLOGO /F Makefile.win && ^
|
||||
nmake /NOLOGO /F Makefile.win install && ^
|
||||
nmake /NOLOGO /F Makefile.win installcheck && ^
|
||||
@@ -125,7 +126,7 @@ jobs:
|
||||
- uses: actions/checkout@v4
|
||||
- uses: ankane/setup-postgres-valgrind@v1
|
||||
with:
|
||||
postgres-version: 16
|
||||
postgres-version: 17
|
||||
check-ub: yes
|
||||
- run: make OPTFLAGS=""
|
||||
- run: sudo --preserve-env=PG_CONFIG make install
|
||||
|
||||
2
LICENSE
2
LICENSE
@@ -1,4 +1,4 @@
|
||||
Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
|
||||
Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
|
||||
|
||||
Portions Copyright (c) 1994, The Regents of the University of California
|
||||
|
||||
|
||||
111
README.md
111
README.md
@@ -52,8 +52,6 @@ nmake /F Makefile.win
|
||||
nmake /F Makefile.win install
|
||||
```
|
||||
|
||||
Note: Postgres 17 is not supported yet due to an upstream issue
|
||||
|
||||
See the [installation notes](#installation-notes---windows) if you run into issues
|
||||
|
||||
You can also install it with [Docker](#docker) or [conda-forge](#conda-forge).
|
||||
@@ -84,7 +82,7 @@ Get the nearest neighbors by L2 distance
|
||||
SELECT * FROM items ORDER BY embedding <-> '[3,1,2]' LIMIT 5;
|
||||
```
|
||||
|
||||
Also supports inner product (`<#>`), cosine distance (`<=>`), and L1 distance (`<+>`, added in 0.7.0)
|
||||
Also supports inner product (`<#>`), cosine distance (`<=>`), and L1 distance (`<+>`)
|
||||
|
||||
Note: `<#>` returns the negative inner product since Postgres only supports `ASC` order index scans on operators
|
||||
|
||||
@@ -148,9 +146,9 @@ Supported distance functions are:
|
||||
- `<->` - L2 distance
|
||||
- `<#>` - (negative) inner product
|
||||
- `<=>` - cosine distance
|
||||
- `<+>` - L1 distance (added in 0.7.0)
|
||||
- `<~>` - Hamming distance (binary vectors, added in 0.7.0)
|
||||
- `<%>` - Jaccard distance (binary vectors, added in 0.7.0)
|
||||
- `<+>` - L1 distance
|
||||
- `<~>` - Hamming distance (binary vectors)
|
||||
- `<%>` - Jaccard distance (binary vectors)
|
||||
|
||||
Get the nearest neighbors to a row
|
||||
|
||||
@@ -237,19 +235,19 @@ Cosine distance
|
||||
CREATE INDEX ON items USING hnsw (embedding vector_cosine_ops);
|
||||
```
|
||||
|
||||
L1 distance - added in 0.7.0
|
||||
L1 distance
|
||||
|
||||
```sql
|
||||
CREATE INDEX ON items USING hnsw (embedding vector_l1_ops);
|
||||
```
|
||||
|
||||
Hamming distance - added in 0.7.0
|
||||
Hamming distance
|
||||
|
||||
```sql
|
||||
CREATE INDEX ON items USING hnsw (embedding bit_hamming_ops);
|
||||
```
|
||||
|
||||
Jaccard distance - added in 0.7.0
|
||||
Jaccard distance
|
||||
|
||||
```sql
|
||||
CREATE INDEX ON items USING hnsw (embedding bit_jaccard_ops);
|
||||
@@ -258,9 +256,9 @@ CREATE INDEX ON items USING hnsw (embedding bit_jaccard_ops);
|
||||
Supported types are:
|
||||
|
||||
- `vector` - up to 2,000 dimensions
|
||||
- `halfvec` - up to 4,000 dimensions (added in 0.7.0)
|
||||
- `bit` - up to 64,000 dimensions (added in 0.7.0)
|
||||
- `sparsevec` - up to 1,000 non-zero elements (added in 0.7.0)
|
||||
- `halfvec` - up to 4,000 dimensions
|
||||
- `bit` - up to 64,000 dimensions
|
||||
- `sparsevec` - up to 1,000 non-zero elements
|
||||
|
||||
### Index Options
|
||||
|
||||
@@ -314,7 +312,7 @@ Note: Do not set `maintenance_work_mem` so high that it exhausts the memory on t
|
||||
|
||||
Like other index types, it’s faster to create an index after loading your initial data
|
||||
|
||||
Starting with 0.6.0, you can also speed up index creation by increasing the number of parallel workers (2 by default)
|
||||
You can also speed up index creation by increasing the number of parallel workers (2 by default)
|
||||
|
||||
```sql
|
||||
SET max_parallel_maintenance_workers = 7; -- plus leader
|
||||
@@ -367,7 +365,7 @@ Cosine distance
|
||||
CREATE INDEX ON items USING ivfflat (embedding vector_cosine_ops) WITH (lists = 100);
|
||||
```
|
||||
|
||||
Hamming distance - added in 0.7.0
|
||||
Hamming distance
|
||||
|
||||
```sql
|
||||
CREATE INDEX ON items USING ivfflat (embedding bit_hamming_ops) WITH (lists = 100);
|
||||
@@ -376,8 +374,8 @@ CREATE INDEX ON items USING ivfflat (embedding bit_hamming_ops) WITH (lists = 10
|
||||
Supported types are:
|
||||
|
||||
- `vector` - up to 2,000 dimensions
|
||||
- `halfvec` - up to 4,000 dimensions (added in 0.7.0)
|
||||
- `bit` - up to 64,000 dimensions (added in 0.7.0)
|
||||
- `halfvec` - up to 4,000 dimensions
|
||||
- `bit` - up to 64,000 dimensions
|
||||
|
||||
### Query Options
|
||||
|
||||
@@ -549,8 +547,6 @@ Note: If this is lower than `ivfflat.probes`, `ivfflat.probes` will be used
|
||||
|
||||
## Half-Precision Vectors
|
||||
|
||||
*Added in 0.7.0*
|
||||
|
||||
Use the `halfvec` type to store half-precision vectors
|
||||
|
||||
```sql
|
||||
@@ -559,8 +555,6 @@ CREATE TABLE items (id bigserial PRIMARY KEY, embedding halfvec(3));
|
||||
|
||||
## Half-Precision Indexing
|
||||
|
||||
*Added in 0.7.0*
|
||||
|
||||
Index vectors at half precision for smaller indexes
|
||||
|
||||
```sql
|
||||
@@ -582,24 +576,16 @@ CREATE TABLE items (id bigserial PRIMARY KEY, embedding bit(3));
|
||||
INSERT INTO items (embedding) VALUES ('000'), ('111');
|
||||
```
|
||||
|
||||
Get the nearest neighbors by Hamming distance (added in 0.7.0)
|
||||
Get the nearest neighbors by Hamming distance
|
||||
|
||||
```sql
|
||||
SELECT * FROM items ORDER BY embedding <~> '101' LIMIT 5;
|
||||
```
|
||||
|
||||
Or (before 0.7.0)
|
||||
|
||||
```sql
|
||||
SELECT * FROM items ORDER BY bit_count(embedding # '101') LIMIT 5;
|
||||
```
|
||||
|
||||
Also supports Jaccard distance (`<%>`)
|
||||
|
||||
## Binary Quantization
|
||||
|
||||
*Added in 0.7.0*
|
||||
|
||||
Use expression indexing for binary quantization
|
||||
|
||||
```sql
|
||||
@@ -622,8 +608,6 @@ SELECT * FROM (
|
||||
|
||||
## Sparse Vectors
|
||||
|
||||
*Added in 0.7.0*
|
||||
|
||||
Use the `sparsevec` type to store sparse vectors
|
||||
|
||||
```sql
|
||||
@@ -657,8 +641,6 @@ You can use [Reciprocal Rank Fusion](https://github.com/pgvector/pgvector-python
|
||||
|
||||
## Indexing Subvectors
|
||||
|
||||
*Added in 0.7.0*
|
||||
|
||||
Use expression indexing to index subvectors
|
||||
|
||||
```sql
|
||||
@@ -801,8 +783,12 @@ C | [pgvector-c](https://github.com/pgvector/pgvector-c)
|
||||
C++ | [pgvector-cpp](https://github.com/pgvector/pgvector-cpp)
|
||||
C#, F#, Visual Basic | [pgvector-dotnet](https://github.com/pgvector/pgvector-dotnet)
|
||||
Crystal | [pgvector-crystal](https://github.com/pgvector/pgvector-crystal)
|
||||
D | [pgvector-d](https://github.com/pgvector/pgvector-d)
|
||||
Dart | [pgvector-dart](https://github.com/pgvector/pgvector-dart)
|
||||
Elixir | [pgvector-elixir](https://github.com/pgvector/pgvector-elixir)
|
||||
Erlang | [pgvector-erlang](https://github.com/pgvector/pgvector-erlang)
|
||||
Fortran | [pgvector-fortran](https://github.com/pgvector/pgvector-fortran)
|
||||
Gleam | [pgvector-gleam](https://github.com/pgvector/pgvector-gleam)
|
||||
Go | [pgvector-go](https://github.com/pgvector/pgvector-go)
|
||||
Haskell | [pgvector-haskell](https://github.com/pgvector/pgvector-haskell)
|
||||
Java, Kotlin, Groovy, Scala | [pgvector-java](https://github.com/pgvector/pgvector-java)
|
||||
@@ -816,6 +802,7 @@ Perl | [pgvector-perl](https://github.com/pgvector/pgvector-perl)
|
||||
PHP | [pgvector-php](https://github.com/pgvector/pgvector-php)
|
||||
Python | [pgvector-python](https://github.com/pgvector/pgvector-python)
|
||||
R | [pgvector-r](https://github.com/pgvector/pgvector-r)
|
||||
Raku | [pgvector-raku](https://github.com/pgvector/pgvector-raku)
|
||||
Ruby | [pgvector-ruby](https://github.com/pgvector/pgvector-ruby), [Neighbor](https://github.com/ankane/neighbor)
|
||||
Rust | [pgvector-rust](https://github.com/pgvector/pgvector-rust)
|
||||
Swift | [pgvector-swift](https://github.com/pgvector/pgvector-swift)
|
||||
@@ -937,7 +924,7 @@ ALTER TABLE items ALTER COLUMN embedding SET STORAGE PLAIN;
|
||||
|
||||
#### Why are there less results for a query after adding an HNSW index?
|
||||
|
||||
Results are limited by the size of the dynamic candidate list (`hnsw.ef_search`). There may be even less results due to dead tuples or filtering conditions in the query. We recommend setting `hnsw.ef_search` to at least twice the `LIMIT` of the query. If you need more than 500 results, use an IVFFlat index instead.
|
||||
Results are limited by the size of the dynamic candidate list (`hnsw.ef_search`), which is 40 by default. There may be even less results due to dead tuples or filtering conditions in the query. Enabling [iterative index scans](#iterative-index-scans) can help address this.
|
||||
|
||||
Also, note that `NULL` vectors are not indexed (as well as zero vectors for cosine distance).
|
||||
|
||||
@@ -949,7 +936,7 @@ The index was likely created with too little data for the number of lists. Drop
|
||||
DROP INDEX index_name;
|
||||
```
|
||||
|
||||
Results can also be limited by the number of probes (`ivfflat.probes`).
|
||||
Results can also be limited by the number of probes (`ivfflat.probes`). Enabling [iterative index scans](#iterative-index-scans) can address this.
|
||||
|
||||
Also, note that `NULL` vectors are not indexed (as well as zero vectors for cosine distance).
|
||||
|
||||
@@ -1116,7 +1103,13 @@ Note: Replace `17` with your Postgres server version
|
||||
|
||||
### Missing SDK
|
||||
|
||||
If compilation fails and the output includes `warning: no such sysroot directory` on Mac, reinstall Xcode Command Line Tools.
|
||||
If compilation fails and the output includes `warning: no such sysroot directory` on Mac, your Postgres installation points to a path that no longer exists.
|
||||
|
||||
```sh
|
||||
pg_config --cppflags
|
||||
```
|
||||
|
||||
Reinstall Postgres to fix this.
|
||||
|
||||
### Portability
|
||||
|
||||
@@ -1134,6 +1127,14 @@ make OPTFLAGS=""
|
||||
|
||||
If compilation fails with `Cannot open include file: 'postgres.h': No such file or directory`, make sure `PGROOT` is correct.
|
||||
|
||||
### Mismatched Architecture
|
||||
|
||||
If compilation fails with `error C2196: case value '4' already used`, make sure `vcvars64.bat` was called.
|
||||
|
||||
### Missing Symbol
|
||||
|
||||
If linking fails with `unresolved external symbol float_to_shortest_decimal_bufn` with Postgres 17.0-17.2, upgrade to Postgres 17.3+.
|
||||
|
||||
### Permissions
|
||||
|
||||
If installation fails with `Access is denied`, re-run the installation instructions as an administrator.
|
||||
@@ -1158,6 +1159,12 @@ cd pgvector
|
||||
docker build --pull --build-arg PG_MAJOR=17 -t myuser/pgvector .
|
||||
```
|
||||
|
||||
If you increase `maintenance_work_mem`, make sure `--shm-size` is at least that size to avoid an error with parallel HNSW index builds.
|
||||
|
||||
```sh
|
||||
docker run --shm-size=1g ...
|
||||
```
|
||||
|
||||
### Homebrew
|
||||
|
||||
With Homebrew Postgres, you can use:
|
||||
@@ -1203,7 +1210,7 @@ Note: Replace `17` with your Postgres server version
|
||||
Install the FreeBSD package with:
|
||||
|
||||
```sh
|
||||
pkg install postgresql15-pgvector
|
||||
pkg install postgresql16-pgvector
|
||||
```
|
||||
|
||||
or the port with:
|
||||
@@ -1245,36 +1252,6 @@ You can check the version in the current database with:
|
||||
SELECT extversion FROM pg_extension WHERE extname = 'vector';
|
||||
```
|
||||
|
||||
## Upgrade Notes
|
||||
|
||||
### 0.6.0
|
||||
|
||||
#### Postgres 12
|
||||
|
||||
If upgrading with Postgres 12, remove this line from `sql/vector--0.5.1--0.6.0.sql`:
|
||||
|
||||
```sql
|
||||
ALTER TYPE vector SET (STORAGE = external);
|
||||
```
|
||||
|
||||
Then run `make install` and `ALTER EXTENSION vector UPDATE;`.
|
||||
|
||||
#### Docker
|
||||
|
||||
The Docker image is now published in the `pgvector` org, and there are tags for each supported version of Postgres (rather than a `latest` tag).
|
||||
|
||||
```sh
|
||||
docker pull pgvector/pgvector:pg16
|
||||
# or
|
||||
docker pull pgvector/pgvector:0.6.0-pg16
|
||||
```
|
||||
|
||||
Also, if you’ve increased `maintenance_work_mem`, make sure `--shm-size` is at least that size to avoid an error with parallel HNSW index builds.
|
||||
|
||||
```sh
|
||||
docker run --shm-size=1g ...
|
||||
```
|
||||
|
||||
## Thanks
|
||||
|
||||
Thanks to:
|
||||
|
||||
@@ -8,6 +8,9 @@
|
||||
#error "Requires PostgreSQL 13+"
|
||||
#endif
|
||||
|
||||
/* Check architecture in first header */
|
||||
StaticAssertDecl(sizeof(Datum) == SIZEOF_DATUM, "Architecture mismatch");
|
||||
|
||||
extern uint64 (*BitHammingDistance) (uint32 bytes, unsigned char *ax, unsigned char *bx, uint64 distance);
|
||||
extern double (*BitJaccardDistance) (uint32 bytes, unsigned char *ax, unsigned char *bx, uint64 ab, uint64 aa, uint64 bb);
|
||||
|
||||
|
||||
@@ -126,7 +126,7 @@ typedef struct HnswNeighborArray HnswNeighborArray;
|
||||
|
||||
#define HnswPtrDeclare(type, relptrtype, ptrtype) \
|
||||
relptr_declare(type, relptrtype); \
|
||||
typedef union { type *ptr; relptrtype relptr; } ptrtype;
|
||||
typedef union { type *ptr; relptrtype relptr; } ptrtype
|
||||
|
||||
/* Pointers that can be absolute or relative */
|
||||
/* Use char for DatumPtr so works with Pointer */
|
||||
|
||||
@@ -1393,7 +1393,7 @@ hnsw_halfvec_support(PG_FUNCTION_ARGS)
|
||||
};
|
||||
|
||||
PG_RETURN_POINTER(&typeInfo);
|
||||
};
|
||||
}
|
||||
|
||||
FUNCTION_PREFIX PG_FUNCTION_INFO_V1(hnsw_bit_support);
|
||||
Datum
|
||||
@@ -1406,7 +1406,7 @@ hnsw_bit_support(PG_FUNCTION_ARGS)
|
||||
};
|
||||
|
||||
PG_RETURN_POINTER(&typeInfo);
|
||||
};
|
||||
}
|
||||
|
||||
FUNCTION_PREFIX PG_FUNCTION_INFO_V1(hnsw_sparsevec_support);
|
||||
Datum
|
||||
@@ -1419,4 +1419,4 @@ hnsw_sparsevec_support(PG_FUNCTION_ARGS)
|
||||
};
|
||||
|
||||
PG_RETURN_POINTER(&typeInfo);
|
||||
};
|
||||
}
|
||||
|
||||
@@ -9,6 +9,10 @@
|
||||
#include "storage/lmgr.h"
|
||||
#include "utils/memutils.h"
|
||||
|
||||
#if PG_VERSION_NUM >= 180000
|
||||
#define vacuum_delay_point() vacuum_delay_point(false)
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Check if deleted list contains an index TID
|
||||
*/
|
||||
|
||||
@@ -360,7 +360,7 @@ InitBuildState(IvfflatBuildState * buildstate, Relation heap, Relation index, In
|
||||
buildstate->sortdesc = CreateTemplateTupleDesc(3);
|
||||
TupleDescInitEntry(buildstate->sortdesc, (AttrNumber) 1, "list", INT4OID, -1, 0);
|
||||
TupleDescInitEntry(buildstate->sortdesc, (AttrNumber) 2, "tid", TIDOID, -1, 0);
|
||||
TupleDescInitEntry(buildstate->sortdesc, (AttrNumber) 3, "vector", buildstate->tupdesc->attrs[0].atttypid, -1, 0);
|
||||
TupleDescInitEntry(buildstate->sortdesc, (AttrNumber) 3, "vector", TupleDescAttr(buildstate->tupdesc, 0)->atttypid, -1, 0);
|
||||
|
||||
buildstate->slot = MakeSingleTupleTableSlot(buildstate->sortdesc, &TTSOpsVirtual);
|
||||
|
||||
|
||||
@@ -355,7 +355,7 @@ ivfflat_halfvec_support(PG_FUNCTION_ARGS)
|
||||
};
|
||||
|
||||
PG_RETURN_POINTER(&typeInfo);
|
||||
};
|
||||
}
|
||||
|
||||
FUNCTION_PREFIX PG_FUNCTION_INFO_V1(ivfflat_bit_support);
|
||||
Datum
|
||||
@@ -370,4 +370,4 @@ ivfflat_bit_support(PG_FUNCTION_ARGS)
|
||||
};
|
||||
|
||||
PG_RETURN_POINTER(&typeInfo);
|
||||
};
|
||||
}
|
||||
|
||||
@@ -5,6 +5,10 @@
|
||||
#include "ivfflat.h"
|
||||
#include "storage/bufmgr.h"
|
||||
|
||||
#if PG_VERSION_NUM >= 180000
|
||||
#define vacuum_delay_point() vacuum_delay_point(false)
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Bulk delete tuples from the index
|
||||
*/
|
||||
|
||||
@@ -123,6 +123,12 @@ SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
||||
[0,0,0]
|
||||
(3 rows)
|
||||
|
||||
TRUNCATE t;
|
||||
SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
||||
val
|
||||
-----
|
||||
(0 rows)
|
||||
|
||||
RESET hnsw.iterative_scan;
|
||||
RESET hnsw.ef_search;
|
||||
DROP TABLE t;
|
||||
|
||||
@@ -110,6 +110,15 @@ SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
||||
[1,1,1]
|
||||
(2 rows)
|
||||
|
||||
TRUNCATE t;
|
||||
NOTICE: ivfflat index created with little data
|
||||
DETAIL: This will cause low recall.
|
||||
HINT: Drop the index until the table has more data.
|
||||
SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
||||
val
|
||||
-----
|
||||
(0 rows)
|
||||
|
||||
RESET ivfflat.iterative_scan;
|
||||
RESET ivfflat.max_probes;
|
||||
DROP TABLE t;
|
||||
|
||||
@@ -70,6 +70,9 @@ SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
||||
SET hnsw.iterative_scan = relaxed_order;
|
||||
SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
||||
|
||||
TRUNCATE t;
|
||||
SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
||||
|
||||
RESET hnsw.iterative_scan;
|
||||
RESET hnsw.ef_search;
|
||||
DROP TABLE t;
|
||||
|
||||
@@ -59,6 +59,9 @@ SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
||||
SET ivfflat.max_probes = 2;
|
||||
SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
||||
|
||||
TRUNCATE t;
|
||||
SELECT * FROM t ORDER BY val <-> '[3,3,3]';
|
||||
|
||||
RESET ivfflat.iterative_scan;
|
||||
RESET ivfflat.max_probes;
|
||||
DROP TABLE t;
|
||||
|
||||
Reference in New Issue
Block a user