Class: PGVectorStore
Provides support for writing and querying vector data in Postgres. Note: Can't be used with data created using the Python version of the vector store (https://docs.llamaindex.ai/en/stable/examples/vector_stores/postgres.html)
Implements
Constructors
constructor
• new PGVectorStore(config?): PGVectorStore
Constructs a new instance of the PGVectorStore
If the connectionString is not provided the following env variables are
used to connect to the DB:
PGHOST=your database host
PGUSER=your database user
PGPASSWORD=your database password
PGDATABASE=your database name
PGPORT=your database port
Parameters
| Name | Type | Description |
|---|---|---|
config? | Object | The configuration settings for the instance. |
config.connectionString? | string | The connection string (optional). |
config.dimensions? | number | The dimensions of the embedding model. |
config.schemaName? | string | The name of the schema (optional). Defaults to PGVECTOR_SCHEMA. |
config.tableName? | string | The name of the table (optional). Defaults to PGVECTOR_TABLE. |
Returns
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:44
Properties
collection
• Private collection: string = ""
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:19
connectionString
• Private connectionString: undefined | string = undefined
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:22
db
• Private Optional db: Client
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:25
dimensions
• Private dimensions: number = 1536
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:23
schemaName
• Private schemaName: string = PGVECTOR_SCHEMA
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:20
storesText
• storesText: boolean = true
Implementation of
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:17
tableName
• Private tableName: string = PGVECTOR_TABLE
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:21
Methods
add
▸ add(embeddingResults): Promise<string[]>
Adds vector record(s) to the table. NOTE: Uses the collection property controlled by setCollection/getCollection.
Parameters
| Name | Type | Description |
|---|---|---|
embeddingResults | BaseNode<Metadata>[] | The Nodes to be inserted, optionally including metadata tuples. |
Returns
Promise<string[]>
A list of zero or more id values for the created records.
Implementation of
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:181
checkSchema
▸ checkSchema(db): Promise<Client>
Parameters
| Name | Type |
|---|---|
db | Client |
Returns
Promise<Client>
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:106
clearCollection
▸ clearCollection(): Promise<QueryResult<any>>
Delete all vector records for the specified collection. NOTE: Uses the collection property controlled by setCollection/getCollection.
Returns
Promise<QueryResult<any>>
The result of the delete query.
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:142
client
▸ client(): Promise<Client>
Connects to the database specified in environment vars. This method also checks and creates the vector extension, the destination table and indexes if not found.
Returns
Promise<Client>
A connection to the database, or the error encountered while connecting/setting up.
Implementation of
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:133
delete
▸ delete(refDocId, deleteKwargs?): Promise<void>
Deletes a single record from the database by id. NOTE: Uses the collection property controlled by setCollection/getCollection.
Parameters
| Name | Type | Description |
|---|---|---|
refDocId | string | Unique identifier for the record to delete. |
deleteKwargs? | any | Required by VectorStore interface. Currently ignored. |
Returns
Promise<void>
Promise that resolves if the delete query did not throw an error.
Implementation of
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:219
getCollection
▸ getCollection(): string
Getter for the collection property. Using a collection allows for simple segregation of vector data, e.g. by user, source, or access-level. Leave/set blank to ignore the collection value when querying.
Returns
string
The currently-set collection value. Default is empty string.
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:74
getDataToInsert
▸ getDataToInsert(embeddingResults): any[][]
Parameters
| Name | Type |
|---|---|
embeddingResults | BaseNode<Metadata>[] |
Returns
any[][]
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:152
getDb
▸ getDb(): Promise<Client>
Returns
Promise<Client>
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:78
persist
▸ persist(persistPath, fs?): Promise<void>
Required by VectorStore interface. Currently ignored.
Parameters
| Name | Type |
|---|---|
persistPath | string |
fs? | GenericFileSystem |
Returns
Promise<void>
Resolved Promise.
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:302
query
▸ query(query, options?): Promise<VectorStoreQueryResult>
Query the vector store for the closest matching data to the query embeddings
Parameters
| Name | Type | Description |
|---|---|---|
query | VectorStoreQuery | The VectorStoreQuery to be used |
options? | any | Required by VectorStore interface. Currently ignored. |
Returns
Promise<VectorStoreQueryResult>
Zero or more Document instances with data from the vector store.
Implementation of
Defined in
packages/core/src/storage/vectorStore/PGVectorStore.ts:240
setCollection
▸ setCollection(coll): void
Setter for the collection property. Using a collection allows for simple segregation of vector data, e.g. by user, source, or access-level. Leave/set blank to ignore the collection value when querying.
Parameters
| Name | Type | Description |
|---|---|---|
coll | string | Name for the collection. |
Returns
void