langchain_community.vectorstores.singlestoredb.SingleStoreDB¶

class langchain_community.vectorstores.singlestoredb.SingleStoreDB(embedding: Embeddings, *, distance_strategy: DistanceStrategy = DistanceStrategy.DOT_PRODUCT, table_name: str = 'embeddings', content_field: str = 'content', metadata_field: str = 'metadata', vector_field: str = 'vector', id_field: str = 'id', use_vector_index: bool = False, vector_index_name: str = '', vector_index_options: Optional[dict] = None, vector_size: int = 1536, use_full_text_search: bool = False, pool_size: int = 5, max_overflow: int = 10, timeout: float = 30, **kwargs: Any)[source]¶

SingleStore DB vector store.

The prerequisite for using this class is the installation of the singlestoredb Python package.

The SingleStoreDB vectorstore can be created by providing an embedding function and the relevant parameters for the database connection, connection pool, and optionally, the names of the table and the fields to use.

Initialize with necessary components.

Parameters

  • embedding (Embeddings) – A text embedding model.

  • distance_strategy (DistanceStrategy, optional) –

    Determines the strategy employed for calculating the distance between vectors in the embedding space. Defaults to DOT_PRODUCT. Available options are: - DOT_PRODUCT: Computes the scalar product of two vectors.

    This is the default behavior

    • EUCLIDEAN_DISTANCE: Computes the Euclidean distance between

      two vectors. This metric considers the geometric distance in the vector space, and might be more suitable for embeddings that rely on spatial relationships. This metric is not compatible with the WEIGHTED_SUM search strategy.

  • table_name (str, optional) – Specifies the name of the table in use. Defaults to “embeddings”.

  • content_field (str, optional) – Specifies the field to store the content. Defaults to “content”.

  • metadata_field (str, optional) – Specifies the field to store metadata. Defaults to “metadata”.

  • vector_field (str, optional) – Specifies the field to store the vector. Defaults to “vector”.

  • id_field (str, optional) – Specifies the field to store the id. Defaults to “id”.

  • use_vector_index (bool, optional) – Toggles the use of a vector index. Works only with SingleStoreDB 8.5 or later. Defaults to False. If set to True, vector_size parameter is required to be set to a proper value.

  • vector_index_name (str, optional) – Specifies the name of the vector index. Defaults to empty. Will be ignored if use_vector_index is set to False.

  • vector_index_options (dict, optional) –

    Specifies the options for the vector index. Defaults to {}. Will be ignored if use_vector_index is set to False. The options are: index_type (str, optional): Specifies the type of the index.

    Defaults to IVF_PQFS.

    For more options, please refer to the SingleStoreDB documentation: https://docs.singlestore.com/cloud/reference/sql-reference/vector-functions/vector-indexing/

  • vector_size (int, optional) – Specifies the size of the vector. Defaults to 1536. Required if use_vector_index is set to True. Should be set to the same value as the size of the vectors stored in the vector_field.

  • use_full_text_search (bool, optional) – Toggles the use a full-text index on the document content. Defaults to False. If set to True, the table will be created with a full-text index on the content field, and the simularity_search method will all using TEXT_ONLY, FILTER_BY_TEXT, FILTER_BY_VECTOR, and WIGHTED_SUM search strategies. If set to False, the simularity_search method will only allow VECTOR_ONLY search strategy.

  • pool (Following arguments pertain to the connection) –

  • pool_size (int, optional) – Determines the number of active connections in the pool. Defaults to 5.

  • max_overflow (int, optional) – Determines the maximum number of connections allowed beyond the pool_size. Defaults to 10.

  • timeout (float, optional) – Specifies the maximum wait time in seconds for establishing a connection. Defaults to 30.

  • connection (database) –

  • host (str, optional) – Specifies the hostname, IP address, or URL for the database connection. The default scheme is “mysql”.

  • user (str, optional) – Database username.

  • password (str, optional) – Database password.

  • port (int, optional) – Database port. Defaults to 3306 for non-HTTP connections, 80 for HTTP connections, and 443 for HTTPS connections.

  • database (str, optional) – Database name.

  • the (Additional optional arguments provide further customization over) –

  • connection –

  • pure_python (bool, optional) – Toggles the connector mode. If True, operates in pure Python mode.

  • local_infile (bool, optional) – Allows local file uploads.

  • charset (str, optional) – Specifies the character set for string values.

  • ssl_key (str, optional) – Specifies the path of the file containing the SSL key.

  • ssl_cert (str, optional) – Specifies the path of the file containing the SSL certificate.

  • ssl_ca (str, optional) – Specifies the path of the file containing the SSL certificate authority.

  • ssl_cipher (str, optional) – Sets the SSL cipher list.

  • ssl_disabled (bool, optional) – Disables SSL usage.

  • ssl_verify_cert (bool, optional) – Verifies the server’s certificate. Automatically enabled if ssl_ca is specified.

  • ssl_verify_identity (bool, optional) – Verifies the server’s identity.

  • conv (dict[int, Callable], optional) – A dictionary of data conversion functions.

  • credential_type (str, optional) – Specifies the type of authentication to use: auth.PASSWORD, auth.JWT, or auth.BROWSER_SSO.

  • autocommit (bool, optional) – Enables autocommits.

  • results_type (str, optional) – Determines the structure of the query results: tuples, namedtuples, dicts.

  • results_format (str, optional) – Deprecated. This option has been renamed to results_type.

  • kwargs (Any) –

Examples

Basic Usage:

from langchain_openai import OpenAIEmbeddings
from langchain_community.vectorstores import SingleStoreDB

vectorstore = SingleStoreDB(
    OpenAIEmbeddings(),
    host="https://user:password@127.0.0.1:3306/database"
)

Advanced Usage:

from langchain_openai import OpenAIEmbeddings
from langchain_community.vectorstores import SingleStoreDB

vectorstore = SingleStoreDB(
    OpenAIEmbeddings(),
    distance_strategy=DistanceStrategy.EUCLIDEAN_DISTANCE,
    host="127.0.0.1",
    port=3306,
    user="user",
    password="password",
    database="db",
    table_name="my_custom_table",
    pool_size=10,
    timeout=60,
)

Using environment variables:

from langchain_openai import OpenAIEmbeddings
from langchain_community.vectorstores import SingleStoreDB

os.environ['SINGLESTOREDB_URL'] = 'me:p455w0rd@s2-host.com/my_db'
vectorstore = SingleStoreDB(OpenAIEmbeddings())

Using vector index:

from langchain_openai import OpenAIEmbeddings
from langchain_community.vectorstores import SingleStoreDB

os.environ['SINGLESTOREDB_URL'] = 'me:p455w0rd@s2-host.com/my_db'
vectorstore = SingleStoreDB(
    OpenAIEmbeddings(),
    use_vector_index=True,
)

Using full-text index:

Attributes

embeddings

Access the query embedding object if available.

Methods

__init__(embedding, *[, distance_strategy, ...])

Initialize with necessary components.

aadd_documents(documents, **kwargs)

Run more documents through the embeddings and add to the vectorstore.

aadd_texts(texts[, metadatas])

Run more texts through the embeddings and add to the vectorstore.

add_documents(documents, **kwargs)

Run more documents through the embeddings and add to the vectorstore.

add_images(uris[, metadatas, embeddings])

Run images through the embeddings and add to the vectorstore.

add_texts(texts[, metadatas, embeddings])

Add more texts to the vectorstore.

adelete([ids])

Delete by vector ID or other criteria.

afrom_documents(documents, embedding, **kwargs)

Return VectorStore initialized from documents and embeddings.

afrom_texts(texts, embedding[, metadatas])

Return VectorStore initialized from texts and embeddings.

amax_marginal_relevance_search(query[, k, ...])

Return docs selected using the maximal marginal relevance.

amax_marginal_relevance_search_by_vector(...)

Return docs selected using the maximal marginal relevance.

as_retriever(**kwargs)

Return VectorStoreRetriever initialized from this VectorStore.

asearch(query, search_type, **kwargs)

Return docs most similar to query using specified search type.

asimilarity_search(query[, k])

Return docs most similar to query.

asimilarity_search_by_vector(embedding[, k])

Return docs most similar to embedding vector.

asimilarity_search_with_relevance_scores(query)

Return docs and relevance scores in the range [0, 1], asynchronously.

asimilarity_search_with_score(*args, **kwargs)

Run similarity search with distance asynchronously.

delete([ids])

Delete by vector ID or other criteria.

from_documents(documents, embedding, **kwargs)

Return VectorStore initialized from documents and embeddings.

from_texts(texts, embedding[, metadatas, ...])

Create a SingleStoreDB vectorstore from raw documents. This is a user-friendly interface that: 1. Embeds documents. 2. Creates a new table for the embeddings in SingleStoreDB. 3. Adds the documents to the newly created table. This is intended to be a quick way to get started. :param texts: List of texts to add to the vectorstore. :type texts: List[str] :param embedding: A text embedding model. :type embedding: Embeddings :param metadatas: Optional list of metadatas. Defaults to None. :type metadatas: Optional[List[dict]], optional :param distance_strategy: Determines the strategy employed for calculating the distance between vectors in the embedding space. Defaults to DOT_PRODUCT. Available options are: - DOT_PRODUCT: Computes the scalar product of two vectors. This is the default behavior - EUCLIDEAN_DISTANCE: Computes the Euclidean distance between two vectors. This metric considers the geometric distance in the vector space, and might be more suitable for embeddings that rely on spatial relationships. This metric is not compatible with the WEIGHTED_SUM search strategy. :type distance_strategy: DistanceStrategy, optional :param table_name: Specifies the name of the table in use. Defaults to "embeddings". :type table_name: str, optional :param content_field: Specifies the field to store the content. Defaults to "content". :type content_field: str, optional :param metadata_field: Specifies the field to store metadata. Defaults to "metadata". :type metadata_field: str, optional :param vector_field: Specifies the field to store the vector. Defaults to "vector". :type vector_field: str, optional :param id_field: Specifies the field to store the id. Defaults to "id". :type id_field: str, optional :param use_vector_index: Toggles the use of a vector index. Works only with SingleStoreDB 8.5 or later. Defaults to False. If set to True, vector_size parameter is required to be set to a proper value. :type use_vector_index: bool, optional :param vector_index_name: Specifies the name of the vector index. Defaults to empty. Will be ignored if use_vector_index is set to False. :type vector_index_name: str, optional :param vector_index_options: Specifies the options for the vector index. Defaults to {}. Will be ignored if use_vector_index is set to False. The options are: index_type (str, optional): Specifies the type of the index. Defaults to IVF_PQFS. For more options, please refer to the SingleStoreDB documentation: https://docs.singlestore.com/cloud/reference/sql-reference/vector-functions/vector-indexing/ :type vector_index_options: dict, optional :param vector_size: Specifies the size of the vector. Defaults to 1536. Required if use_vector_index is set to True. Should be set to the same value as the size of the vectors stored in the vector_field. :type vector_size: int, optional :param use_full_text_search: Toggles the use a full-text index on the document content. Defaults to False. If set to True, the table will be created with a full-text index on the content field, and the simularity_search method will all using TEXT_ONLY, FILTER_BY_TEXT, FILTER_BY_VECTOR, and WIGHTED_SUM search strategies. If set to False, the simularity_search method will only allow VECTOR_ONLY search strategy. :type use_full_text_search: bool, optional :param pool_size: Determines the number of active connections in the pool. Defaults to 5. :type pool_size: int, optional :param max_overflow: Determines the maximum number of connections allowed beyond the pool_size. Defaults to 10. :type max_overflow: int, optional :param timeout: Specifies the maximum wait time in seconds for establishing a connection. Defaults to 30. :type timeout: float, optional :param Additional optional arguments provide further customization over the: :param database connection: :param pure_python: Toggles the connector mode. If True, operates in pure Python mode. :type pure_python: bool, optional :param local_infile: Allows local file uploads. :type local_infile: bool, optional :param charset: Specifies the character set for string values. :type charset: str, optional :param ssl_key: Specifies the path of the file containing the SSL key. :type ssl_key: str, optional :param ssl_cert: Specifies the path of the file containing the SSL certificate. :type ssl_cert: str, optional :param ssl_ca: Specifies the path of the file containing the SSL certificate authority. :type ssl_ca: str, optional :param ssl_cipher: Sets the SSL cipher list. :type ssl_cipher: str, optional :param ssl_disabled: Disables SSL usage. :type ssl_disabled: bool, optional :param ssl_verify_cert: Verifies the server's certificate. Automatically enabled if ssl_ca is specified. :type ssl_verify_cert: bool, optional :param ssl_verify_identity: Verifies the server's identity. :type ssl_verify_identity: bool, optional :param conv: A dictionary of data conversion functions. :type conv: dict[int, Callable], optional :param credential_type: Specifies the type of authentication to use: auth.PASSWORD, auth.JWT, or auth.BROWSER_SSO. :type credential_type: str, optional :param autocommit: Enables autocommits. :type autocommit: bool, optional :param results_type: Determines the structure of the query results: tuples, namedtuples, dicts. :type results_type: str, optional :param results_format: Deprecated. This option has been renamed to results_type. :type results_format: str, optional.

max_marginal_relevance_search(query[, k, ...])

Return docs selected using the maximal marginal relevance.

max_marginal_relevance_search_by_vector(...)

Return docs selected using the maximal marginal relevance.

search(query, search_type, **kwargs)

Return docs most similar to query using specified search type.

similarity_search(query[, k, filter, ...])

Returns the most similar indexed documents to the query text.

similarity_search_by_vector(embedding[, k])

Return docs most similar to embedding vector.

similarity_search_with_relevance_scores(query)

Return docs and relevance scores in the range [0, 1].

similarity_search_with_score(query[, k, ...])

Return docs most similar to query.
__init__(embedding: Embeddings, *, distance_strategy: DistanceStrategy = DistanceStrategy.DOT_PRODUCT, table_name: str = 'embeddings', content_field: str = 'content', metadata_field: str = 'metadata', vector_field: str = 'vector', id_field: str = 'id', use_vector_index: bool = False, vector_index_name: str = '', vector_index_options: Optional[dict] = None, vector_size: int = 1536, use_full_text_search: bool = False, pool_size: int = 5, max_overflow: int = 10, timeout: float = 30, **kwargs: Any)[source]¶

Initialize with necessary components.

Parameters

  • embedding (Embeddings) – A text embedding model.

  • distance_strategy (DistanceStrategy, optional) –

    Determines the strategy employed for calculating the distance between vectors in the embedding space. Defaults to DOT_PRODUCT. Available options are: - DOT_PRODUCT: Computes the scalar product of two vectors.

    This is the default behavior

    • EUCLIDEAN_DISTANCE: Computes the Euclidean distance between

      two vectors. This metric considers the geometric distance in the vector space, and might be more suitable for embeddings that rely on spatial relationships. This metric is not compatible with the WEIGHTED_SUM search strategy.

  • table_name (str, optional) – Specifies the name of the table in use. Defaults to “embeddings”.

  • content_field (str, optional) – Specifies the field to store the content. Defaults to “content”.

  • metadata_field (str, optional) – Specifies the field to store metadata. Defaults to “metadata”.

  • vector_field (str, optional) – Specifies the field to store the vector. Defaults to “vector”.

  • id_field (str, optional) – Specifies the field to store the id. Defaults to “id”.

  • use_vector_index (bool, optional) – Toggles the use of a vector index. Works only with SingleStoreDB 8.5 or later. Defaults to False. If set to True, vector_size parameter is required to be set to a proper value.

  • vector_index_name (str, optional) – Specifies the name of the vector index. Defaults to empty. Will be ignored if use_vector_index is set to False.

  • vector_index_options (dict, optional) –

    Specifies the options for the vector index. Defaults to {}. Will be ignored if use_vector_index is set to False. The options are: index_type (str, optional): Specifies the type of the index.

    Defaults to IVF_PQFS.

    For more options, please refer to the SingleStoreDB documentation: https://docs.singlestore.com/cloud/reference/sql-reference/vector-functions/vector-indexing/

  • vector_size (int, optional) – Specifies the size of the vector. Defaults to 1536. Required if use_vector_index is set to True. Should be set to the same value as the size of the vectors stored in the vector_field.

  • use_full_text_search (bool, optional) – Toggles the use a full-text index on the document content. Defaults to False. If set to True, the table will be created with a full-text index on the content field, and the simularity_search method will all using TEXT_ONLY, FILTER_BY_TEXT, FILTER_BY_VECTOR, and WIGHTED_SUM search strategies. If set to False, the simularity_search method will only allow VECTOR_ONLY search strategy.

  • pool (Following arguments pertain to the connection) –

  • pool_size (int, optional) – Determines the number of active connections in the pool. Defaults to 5.

  • max_overflow (int, optional) – Determines the maximum number of connections allowed beyond the pool_size. Defaults to 10.

  • timeout (float, optional) – Specifies the maximum wait time in seconds for establishing a connection. Defaults to 30.

  • connection (database) –

  • host (str, optional) – Specifies the hostname, IP address, or URL for the database connection. The default scheme is “mysql”.

  • user (str, optional) – Database username.

  • password (str, optional) – Database password.

  • port (int, optional) – Database port. Defaults to 3306 for non-HTTP connections, 80 for HTTP connections, and 443 for HTTPS connections.

  • database (str, optional) – Database name.

  • the (Additional optional arguments provide further customization over) –

  • connection –

  • pure_python (bool, optional) – Toggles the connector mode. If True, operates in pure Python mode.

  • local_infile (bool, optional) – Allows local file uploads.

  • charset (str, optional) – Specifies the character set for string values.

  • ssl_key (str, optional) – Specifies the path of the file containing the SSL key.

  • ssl_cert (str, optional) – Specifies the path of the file containing the SSL certificate.

  • ssl_ca (str, optional) – Specifies the path of the file containing the SSL certificate authority.

  • ssl_cipher (str, optional) – Sets the SSL cipher list.

  • ssl_disabled (bool, optional) – Disables SSL usage.

  • ssl_verify_cert (bool, optional) – Verifies the server’s certificate. Automatically enabled if ssl_ca is specified.

  • ssl_verify_identity (bool, optional) – Verifies the server’s identity.

  • conv (dict[int, Callable], optional) – A dictionary of data conversion functions.

  • credential_type (str, optional) – Specifies the type of authentication to use: auth.PASSWORD, auth.JWT, or auth.BROWSER_SSO.

  • autocommit (bool, optional) – Enables autocommits.

  • results_type (str, optional) – Determines the structure of the query results: tuples, namedtuples, dicts.

  • results_format (str, optional) – Deprecated. This option has been renamed to results_type.

  • kwargs (Any) –

Examples

Basic Usage:

from langchain_openai import OpenAIEmbeddings
from langchain_community.vectorstores import SingleStoreDB

vectorstore = SingleStoreDB(
    OpenAIEmbeddings(),
    host="https://user:password@127.0.0.1:3306/database"
)

Advanced Usage:

from langchain_openai import OpenAIEmbeddings
from langchain_community.vectorstores import SingleStoreDB

vectorstore = SingleStoreDB(
    OpenAIEmbeddings(),
    distance_strategy=DistanceStrategy.EUCLIDEAN_DISTANCE,
    host="127.0.0.1",
    port=3306,
    user="user",
    password="password",
    database="db",
    table_name="my_custom_table",
    pool_size=10,
    timeout=60,
)

Using environment variables:

from langchain_openai import OpenAIEmbeddings
from langchain_community.vectorstores import SingleStoreDB

os.environ['SINGLESTOREDB_URL'] = 'me:p455w0rd@s2-host.com/my_db'
vectorstore = SingleStoreDB(OpenAIEmbeddings())

Using vector index:

from langchain_openai import OpenAIEmbeddings
from langchain_community.vectorstores import SingleStoreDB

os.environ['SINGLESTOREDB_URL'] = 'me:p455w0rd@s2-host.com/my_db'
vectorstore = SingleStoreDB(
    OpenAIEmbeddings(),
    use_vector_index=True,
)

Using full-text index:

async aadd_documents(documents: List[Document], **kwargs: Any) → List[str]¶

Run more documents through the embeddings and add to the vectorstore.

Parameters

  • (List[Document] (documents) – Documents to add to the vectorstore.

  • documents (List[Document]) –

  • kwargs (Any) –

Returns

List of IDs of the added texts.

Return type

List[str]

async aadd_texts(texts: Iterable[str], metadatas: Optional[List[dict]] = None, **kwargs: Any) → List[str]¶

Run more texts through the embeddings and add to the vectorstore.

Parameters

  • texts (Iterable[str]) –

  • metadatas (Optional[List[dict]]) –

  • kwargs (Any) –

Return type

List[str]

add_documents(documents: List[Document], **kwargs: Any) → List[str]¶

Run more documents through the embeddings and add to the vectorstore.

Parameters

  • (List[Document] (documents) – Documents to add to the vectorstore.

  • documents (List[Document]) –

  • kwargs (Any) –

Returns

List of IDs of the added texts.

Return type

List[str]

add_images(uris: List[str], metadatas: Optional[List[dict]] = None, embeddings: Optional[List[List[float]]] = None, **kwargs: Any) → List[str][source]¶

Run images through the embeddings and add to the vectorstore.

Parameters

  • List[str] (uris) – File path to images. Each URI will be added to the vectorstore as document content.

  • metadatas (Optional[List[dict]], optional) – Optional list of metadatas. Defaults to None.

  • embeddings (Optional[List[List[float]]], optional) – Optional pre-generated embeddings. Defaults to None.

  • uris (List[str]) –

  • kwargs (Any) –

Returns

empty list

Return type

List[str]

add_texts(texts: Iterable[str], metadatas: Optional[List[dict]] = None, embeddings: Optional[List[List[float]]] = None, **kwargs: Any) → List[str][source]¶

Add more texts to the vectorstore.

Parameters

  • texts (Iterable[str]) – Iterable of strings/text to add to the vectorstore.

  • metadatas (Optional[List[dict]], optional) – Optional list of metadatas. Defaults to None.

  • embeddings (Optional[List[List[float]]], optional) – Optional pre-generated embeddings. Defaults to None.

  • kwargs (Any) –

Returns

empty list

Return type

List[str]

async adelete(ids: Optional[List[str]] = None, **kwargs: Any) → Optional[bool]¶

Delete by vector ID or other criteria.

Parameters

  • ids (Optional[List[str]]) – List of ids to delete.

  • **kwargs (Any) – Other keyword arguments that subclasses might use.

Returns

True if deletion is successful, False otherwise, None if not implemented.

Return type

Optional[bool]

async classmethod afrom_documents(documents: List[Document], embedding: Embeddings, **kwargs: Any) → VST¶

Return VectorStore initialized from documents and embeddings.

Parameters

  • documents (List[Document]) –

  • embedding (Embeddings) –

  • kwargs (Any) –

Return type

VST

async classmethod afrom_texts(texts: List[str], embedding: Embeddings, metadatas: Optional[List[dict]] = None, **kwargs: Any) → VST¶

Return VectorStore initialized from texts and embeddings.

Parameters

  • texts (List[str]) –

  • embedding (Embeddings) –

  • metadatas (Optional[List[dict]]) –

  • kwargs (Any) –

Return type

VST

Return docs selected using the maximal marginal relevance.

Maximal marginal relevance optimizes for similarity to query AND diversity among selected documents.

Parameters

  • query (str) – Text to look up documents similar to.

  • k (int) – Number of Documents to return. Defaults to 4.

  • fetch_k (int) – Number of Documents to fetch to pass to MMR algorithm.

  • lambda_mult (float) – Number between 0 and 1 that determines the degree of diversity among the results with 0 corresponding to maximum diversity and 1 to minimum diversity. Defaults to 0.5.

  • kwargs (Any) –

Returns

List of Documents selected by maximal marginal relevance.

Return type

List[Document]

async amax_marginal_relevance_search_by_vector(embedding: List[float], k: int = 4, fetch_k: int = 20, lambda_mult: float = 0.5, **kwargs: Any) → List[Document]¶

Return docs selected using the maximal marginal relevance.

Parameters

  • embedding (List[float]) –

  • k (int) –

  • fetch_k (int) –

  • lambda_mult (float) –

  • kwargs (Any) –

Return type

List[Document]

as_retriever(**kwargs: Any) → VectorStoreRetriever¶

Return VectorStoreRetriever initialized from this VectorStore.

Parameters

  • search_type (Optional[str]) – Defines the type of search that the Retriever should perform. Can be “similarity” (default), “mmr”, or “similarity_score_threshold”.

  • search_kwargs (Optional[Dict]) –

    Keyword arguments to pass to the search function. Can include things like:

    k: Amount of documents to return (Default: 4) score_threshold: Minimum relevance threshold

    for similarity_score_threshold

    fetch_k: Amount of documents to pass to MMR algorithm (Default: 20) lambda_mult: Diversity of results returned by MMR;

    1 for minimum diversity and 0 for maximum. (Default: 0.5)

    filter: Filter by document metadata

  • kwargs (Any) –

Returns

Retriever class for VectorStore.

Return type

VectorStoreRetriever

Examples:

# Retrieve more documents with higher diversity
# Useful if your dataset has many similar documents
docsearch.as_retriever(
    search_type="mmr",
    search_kwargs={'k': 6, 'lambda_mult': 0.25}
)

# Fetch more documents for the MMR algorithm to consider
# But only return the top 5
docsearch.as_retriever(
    search_type="mmr",
    search_kwargs={'k': 5, 'fetch_k': 50}
)

# Only retrieve documents that have a relevance score
# Above a certain threshold
docsearch.as_retriever(
    search_type="similarity_score_threshold",
    search_kwargs={'score_threshold': 0.8}
)

# Only get the single most similar document from the dataset
docsearch.as_retriever(search_kwargs={'k': 1})

# Use a filter to only retrieve documents from a specific paper
docsearch.as_retriever(
    search_kwargs={'filter': {'paper_title':'GPT-4 Technical Report'}}
)
async asearch(query: str, search_type: str, **kwargs: Any) → List[Document]¶

Return docs most similar to query using specified search type.

Parameters

  • query (str) –

  • search_type (str) –

  • kwargs (Any) –

Return type

List[Document]

Return docs most similar to query.

Parameters

  • query (str) –

  • k (int) –

  • kwargs (Any) –

Return type

List[Document]

async asimilarity_search_by_vector(embedding: List[float], k: int = 4, **kwargs: Any) → List[Document]¶

Return docs most similar to embedding vector.

Parameters

  • embedding (List[float]) –

  • k (int) –

  • kwargs (Any) –

Return type

List[Document]

async asimilarity_search_with_relevance_scores(query: str, k: int = 4, **kwargs: Any) → List[Tuple[Document, float]]¶

Return docs and relevance scores in the range [0, 1], asynchronously.

0 is dissimilar, 1 is most similar.

Parameters

  • query (str) – input text

  • k (int) – Number of Documents to return. Defaults to 4.

  • **kwargs (Any) –

    kwargs to be passed to similarity search. Should include: score_threshold: Optional, a floating point value between 0 to 1 to

    filter the resulting set of retrieved docs

Returns

List of Tuples of (doc, similarity_score)

Return type

List[Tuple[Document, float]]

async asimilarity_search_with_score(*args: Any, **kwargs: Any) → List[Tuple[Document, float]]¶

Run similarity search with distance asynchronously.

Parameters

  • args (Any) –

  • kwargs (Any) –

Return type

List[Tuple[Document, float]]

delete(ids: Optional[List[str]] = None, **kwargs: Any) → Optional[bool]¶

Delete by vector ID or other criteria.

Parameters

  • ids (Optional[List[str]]) – List of ids to delete.

  • **kwargs (Any) – Other keyword arguments that subclasses might use.

Returns

True if deletion is successful, False otherwise, None if not implemented.

Return type

Optional[bool]

classmethod from_documents(documents: List[Document], embedding: Embeddings, **kwargs: Any) → VST¶

Return VectorStore initialized from documents and embeddings.

Parameters

  • documents (List[Document]) –

  • embedding (Embeddings) –

  • kwargs (Any) –

Return type

VST

classmethod from_texts(texts: List[str], embedding: Embeddings, metadatas: Optional[List[dict]] = None, distance_strategy: DistanceStrategy = DistanceStrategy.DOT_PRODUCT, table_name: str = 'embeddings', content_field: str = 'content', metadata_field: str = 'metadata', vector_field: str = 'vector', id_field: str = 'id', use_vector_index: bool = False, vector_index_name: str = '', vector_index_options: Optional[dict] = None, vector_size: int = 1536, use_full_text_search: bool = False, pool_size: int = 5, max_overflow: int = 10, timeout: float = 30, **kwargs: Any) → SingleStoreDB[source]¶

Create a SingleStoreDB vectorstore from raw documents. This is a user-friendly interface that:

  1. Embeds documents.

  2. Creates a new table for the embeddings in SingleStoreDB.

  3. Adds the documents to the newly created table.

This is intended to be a quick way to get started. :param texts: List of texts to add to the vectorstore. :type texts: List[str] :param embedding: A text embedding model. :type embedding: Embeddings :param metadatas: Optional list of metadatas.

Defaults to None.

Parameters

  • distance_strategy (DistanceStrategy, optional) –

    Determines the strategy employed for calculating the distance between vectors in the embedding space. Defaults to DOT_PRODUCT. Available options are: - DOT_PRODUCT: Computes the scalar product of two vectors.

    This is the default behavior

    • EUCLIDEAN_DISTANCE: Computes the Euclidean distance between

      two vectors. This metric considers the geometric distance in the vector space, and might be more suitable for embeddings that rely on spatial relationships. This metric is not compatible with the WEIGHTED_SUM search strategy.

  • table_name (str, optional) – Specifies the name of the table in use. Defaults to “embeddings”.

  • content_field (str, optional) – Specifies the field to store the content. Defaults to “content”.

  • metadata_field (str, optional) – Specifies the field to store metadata. Defaults to “metadata”.

  • vector_field (str, optional) – Specifies the field to store the vector. Defaults to “vector”.

  • id_field (str, optional) – Specifies the field to store the id. Defaults to “id”.

  • use_vector_index (bool, optional) – Toggles the use of a vector index. Works only with SingleStoreDB 8.5 or later. Defaults to False. If set to True, vector_size parameter is required to be set to a proper value.

  • vector_index_name (str, optional) – Specifies the name of the vector index. Defaults to empty. Will be ignored if use_vector_index is set to False.

  • vector_index_options (dict, optional) –

    Specifies the options for the vector index. Defaults to {}. Will be ignored if use_vector_index is set to False. The options are: index_type (str, optional): Specifies the type of the index.

    Defaults to IVF_PQFS.

    For more options, please refer to the SingleStoreDB documentation: https://docs.singlestore.com/cloud/reference/sql-reference/vector-functions/vector-indexing/

  • vector_size (int, optional) – Specifies the size of the vector. Defaults to 1536. Required if use_vector_index is set to True. Should be set to the same value as the size of the vectors stored in the vector_field.

  • use_full_text_search (bool, optional) – Toggles the use a full-text index on the document content. Defaults to False. If set to True, the table will be created with a full-text index on the content field, and the simularity_search method will all using TEXT_ONLY, FILTER_BY_TEXT, FILTER_BY_VECTOR, and WIGHTED_SUM search strategies. If set to False, the simularity_search method will only allow VECTOR_ONLY search strategy.

  • pool_size (int, optional) – Determines the number of active connections in the pool. Defaults to 5.

  • max_overflow (int, optional) – Determines the maximum number of connections allowed beyond the pool_size. Defaults to 10.

  • timeout (float, optional) – Specifies the maximum wait time in seconds for establishing a connection. Defaults to 30.

  • the (Additional optional arguments provide further customization over) –

  • connection (database) –

  • pure_python (bool, optional) – Toggles the connector mode. If True, operates in pure Python mode.

  • local_infile (bool, optional) – Allows local file uploads.

  • charset (str, optional) – Specifies the character set for string values.

  • ssl_key (str, optional) – Specifies the path of the file containing the SSL key.

  • ssl_cert (str, optional) – Specifies the path of the file containing the SSL certificate.

  • ssl_ca (str, optional) – Specifies the path of the file containing the SSL certificate authority.

  • ssl_cipher (str, optional) – Sets the SSL cipher list.

  • ssl_disabled (bool, optional) – Disables SSL usage.

  • ssl_verify_cert (bool, optional) – Verifies the server’s certificate. Automatically enabled if ssl_ca is specified.

  • ssl_verify_identity (bool, optional) – Verifies the server’s identity.

  • conv (dict[int, Callable], optional) – A dictionary of data conversion functions.

  • credential_type (str, optional) – Specifies the type of authentication to use: auth.PASSWORD, auth.JWT, or auth.BROWSER_SSO.

  • autocommit (bool, optional) – Enables autocommits.

  • results_type (str, optional) – Determines the structure of the query results: tuples, namedtuples, dicts.

  • results_format (str, optional) – Deprecated. This option has been renamed to results_type.

  • texts (List[str]) –

  • embedding (Embeddings) –

  • metadatas (Optional[List[dict]], optional) –

  • kwargs (Any) –

Return type

SingleStoreDB

Example

from langchain_community.vectorstores import SingleStoreDB
from langchain_openai import OpenAIEmbeddings

s2 = SingleStoreDB.from_texts(
    texts,
    OpenAIEmbeddings(),
    host="username:password@localhost:3306/database"
)

Return docs selected using the maximal marginal relevance.

Maximal marginal relevance optimizes for similarity to query AND diversity among selected documents.

Parameters

  • query (str) – Text to look up documents similar to.

  • k (int) – Number of Documents to return. Defaults to 4.

  • fetch_k (int) – Number of Documents to fetch to pass to MMR algorithm.

  • lambda_mult (float) – Number between 0 and 1 that determines the degree of diversity among the results with 0 corresponding to maximum diversity and 1 to minimum diversity. Defaults to 0.5.

  • kwargs (Any) –

Returns

List of Documents selected by maximal marginal relevance.

Return type

List[Document]

max_marginal_relevance_search_by_vector(embedding: List[float], k: int = 4, fetch_k: int = 20, lambda_mult: float = 0.5, **kwargs: Any) → List[Document]¶

Return docs selected using the maximal marginal relevance.

Maximal marginal relevance optimizes for similarity to query AND diversity among selected documents.

Parameters

  • embedding (List[float]) – Embedding to look up documents similar to.

  • k (int) – Number of Documents to return. Defaults to 4.

  • fetch_k (int) – Number of Documents to fetch to pass to MMR algorithm.

  • lambda_mult (float) – Number between 0 and 1 that determines the degree of diversity among the results with 0 corresponding to maximum diversity and 1 to minimum diversity. Defaults to 0.5.

  • kwargs (Any) –

Returns

List of Documents selected by maximal marginal relevance.

Return type

List[Document]

search(query: str, search_type: str, **kwargs: Any) → List[Document]¶

Return docs most similar to query using specified search type.

Parameters

  • query (str) –

  • search_type (str) –

  • kwargs (Any) –

Return type

List[Document]

Returns the most similar indexed documents to the query text.

Uses cosine similarity.

Parameters

  • query (str) – The query text for which to find similar documents.

  • k (int) – The number of documents to return. Default is 4.

  • filter (dict) – A dictionary of metadata fields and values to filter by. Default is None.

  • search_strategy (SearchStrategy) –

    The search strategy to use. Default is SearchStrategy.VECTOR_ONLY. Available options are: - SearchStrategy.VECTOR_ONLY: Searches only by vector similarity. - SearchStrategy.TEXT_ONLY: Searches only by text similarity. This

    option is only available if use_full_text_search is True.

    • SearchStrategy.FILTER_BY_TEXT: Filters by text similarity and

      searches by vector similarity. This option is only available if use_full_text_search is True.

    • SearchStrategy.FILTER_BY_VECTOR: Filters by vector similarity and

      searches by text similarity. This option is only available if use_full_text_search is True.

    • SearchStrategy.WEIGHTED_SUM: Searches by a weighted sum of text and

      vector similarity. This option is only available if use_full_text_search is True and distance_strategy is DOT_PRODUCT.

  • filter_threshold (float) – The threshold for filtering by text or vector similarity. Default is 0. This option has effect only if search_strategy is SearchStrategy.FILTER_BY_TEXT or SearchStrategy.FILTER_BY_VECTOR.

  • text_weight (float) – The weight of text similarity in the weighted sum search strategy. Default is 0.5. This option has effect only if search_strategy is SearchStrategy.WEIGHTED_SUM.

  • vector_weight (float) – The weight of vector similarity in the weighted sum search strategy. Default is 0.5. This option has effect only if search_strategy is SearchStrategy.WEIGHTED_SUM.

  • vector_select_count_multiplier (int) – The multiplier for the number of vectors to select when using the vector index. Default is 10. This parameter has effect only if use_vector_index is True and search_strategy is SearchStrategy.WEIGHTED_SUM or SearchStrategy.FILTER_BY_TEXT. The number of vectors selected will be k * vector_select_count_multiplier. This is needed due to the limitations of the vector index.

  • kwargs (Any) –

Returns

A list of documents that are most similar to the query text.

Return type

List[Document]

Examples

Basic Usage: .. code-block:: python

from langchain_community.vectorstores import SingleStoreDB from langchain_openai import OpenAIEmbeddings

s2 = SingleStoreDB.from_documents(

docs, OpenAIEmbeddings(), host=”username:password@localhost:3306/database”

) results = s2.similarity_search(“query text”, 1,

{“metadata_field”: “metadata_value”})

Different Search Strategies: .. code-block:: python

from langchain_community.vectorstores import SingleStoreDB from langchain_openai import OpenAIEmbeddings

s2 = SingleStoreDB.from_documents(

docs, OpenAIEmbeddings(), host=”username:password@localhost:3306/database”, use_full_text_search=True, use_vector_index=True,

) results = s2.similarity_search(“query text”, 1,

search_strategy=SingleStoreDB.SearchStrategy.FILTER_BY_TEXT, filter_threshold=0.5)

Weighted Sum Search Strategy: .. code-block:: python

from langchain_community.vectorstores import SingleStoreDB from langchain_openai import OpenAIEmbeddings

s2 = SingleStoreDB.from_documents(

docs, OpenAIEmbeddings(), host=”username:password@localhost:3306/database”, use_full_text_search=True, use_vector_index=True,

) results = s2.similarity_search(“query text”, 1,

search_strategy=SingleStoreDB.SearchStrategy.WEIGHTED_SUM, text_weight=0.3, vector_weight=0.7)

similarity_search_by_vector(embedding: List[float], k: int = 4, **kwargs: Any) → List[Document]¶

Return docs most similar to embedding vector.

Parameters

  • embedding (List[float]) – Embedding to look up documents similar to.

  • k (int) – Number of Documents to return. Defaults to 4.

  • kwargs (Any) –

Returns

List of Documents most similar to the query vector.

Return type

List[Document]

similarity_search_with_relevance_scores(query: str, k: int = 4, **kwargs: Any) → List[Tuple[Document, float]]¶

Return docs and relevance scores in the range [0, 1].

0 is dissimilar, 1 is most similar.

Parameters

  • query (str) – input text

  • k (int) – Number of Documents to return. Defaults to 4.

  • **kwargs (Any) –

    kwargs to be passed to similarity search. Should include: score_threshold: Optional, a floating point value between 0 to 1 to

    filter the resulting set of retrieved docs

Returns

List of Tuples of (doc, similarity_score)

Return type

List[Tuple[Document, float]]

similarity_search_with_score(query: str, k: int = 4, filter: Optional[dict] = None, search_strategy: SearchStrategy = SearchStrategy.VECTOR_ONLY, filter_threshold: float = 1, text_weight: float = 0.5, vector_weight: float = 0.5, vector_select_count_multiplier: int = 10, **kwargs: Any) → List[Tuple[Document, float]][source]¶

Return docs most similar to query. Uses cosine similarity.

Parameters

  • query (str) – Text to look up documents similar to.

  • k (int) – Number of Documents to return. Defaults to 4.

  • filter (Optional[dict]) – A dictionary of metadata fields and values to filter by. Defaults to None.

  • search_strategy (SearchStrategy) –

    The search strategy to use. Default is SearchStrategy.VECTOR_ONLY. Available options are: - SearchStrategy.VECTOR_ONLY: Searches only by vector similarity. - SearchStrategy.TEXT_ONLY: Searches only by text similarity. This

    option is only available if use_full_text_search is True.

    • SearchStrategy.FILTER_BY_TEXT: Filters by text similarity and

      searches by vector similarity. This option is only available if use_full_text_search is True.

    • SearchStrategy.FILTER_BY_VECTOR: Filters by vector similarity and

      searches by text similarity. This option is only available if use_full_text_search is True.

    • SearchStrategy.WEIGHTED_SUM: Searches by a weighted sum of text and

      vector similarity. This option is only available if use_full_text_search is True and distance_strategy is DOT_PRODUCT.

  • filter_threshold (float) – The threshold for filtering by text or vector similarity. Default is 0. This option has effect only if search_strategy is SearchStrategy.FILTER_BY_TEXT or SearchStrategy.FILTER_BY_VECTOR.

  • text_weight (float) – The weight of text similarity in the weighted sum search strategy. Default is 0.5. This option has effect only if search_strategy is SearchStrategy.WEIGHTED_SUM.

  • vector_weight (float) – The weight of vector similarity in the weighted sum search strategy. Default is 0.5. This option has effect only if search_strategy is SearchStrategy.WEIGHTED_SUM.

  • vector_select_count_multiplier (int) – The multiplier for the number of vectors to select when using the vector index. Default is 10. This parameter has effect only if use_vector_index is True and search_strategy is SearchStrategy.WEIGHTED_SUM or SearchStrategy.FILTER_BY_TEXT. The number of vectors selected will be k * vector_select_count_multiplier. This is needed due to the limitations of the vector index.

  • kwargs (Any) –

Returns

List of Documents most similar to the query and score for each document.

Raises

ValueError – If the search strategy is not supported with the distance strategy.

Return type

List[Tuple[Document, float]]

Examples

Basic Usage: .. code-block:: python

from langchain_community.vectorstores import SingleStoreDB from langchain_openai import OpenAIEmbeddings

s2 = SingleStoreDB.from_documents(

docs, OpenAIEmbeddings(), host=”username:password@localhost:3306/database”

) results = s2.similarity_search_with_score(“query text”, 1,

{“metadata_field”: “metadata_value”})

Different Search Strategies:

from langchain_community.vectorstores import SingleStoreDB
from langchain_openai import OpenAIEmbeddings

s2 = SingleStoreDB.from_documents(
    docs,
    OpenAIEmbeddings(),
    host="username:password@localhost:3306/database",
    use_full_text_search=True,
    use_vector_index=True,
)
results = s2.similarity_search_with_score("query text", 1,
        search_strategy=SingleStoreDB.SearchStrategy.FILTER_BY_VECTOR,
        filter_threshold=0.5)

Weighted Sum Search Strategy: .. code-block:: python

from langchain_community.vectorstores import SingleStoreDB from langchain_openai import OpenAIEmbeddings

s2 = SingleStoreDB.from_documents(

docs, OpenAIEmbeddings(), host=”username:password@localhost:3306/database”, use_full_text_search=True, use_vector_index=True,

) results = s2.similarity_search_with_score(“query text”, 1,

search_strategy=SingleStoreDB.SearchStrategy.WEIGHTED_SUM, text_weight=0.3, vector_weight=0.7)

Examples using SingleStoreDB¶