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PostgreSQL

Postgres文档存储 #

基类：EventKVDocumentStore

Postgres 文档（节点）存储。

用于文档和节点对象的Postgres存储。

参数：

名称 类型 描述 默认
postgres_kvstore PostgresKVStore

Postgres 键值存储

 required
namespace str

文档存储的命名空间

 None
batch_size int

批量操作的批次大小

 DEFAULT_BATCH_SIZE
workflows/handler.py 中的源代码llama_index/storage/docstore/postgres/base.py 
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class PostgresDocumentStore(KVDocumentStore):
    """
    Postgres Document (Node) store.

    A Postgres store for Document and Node objects.

    Args:
        postgres_kvstore (PostgresKVStore): Postgres key-value store
        namespace (str): namespace for the docstore
        batch_size (int): batch size for bulk operations

    """

    def __init__(
        self,
        postgres_kvstore: PostgresKVStore,
        namespace: Optional[str] = None,
        batch_size: int = DEFAULT_BATCH_SIZE,
    ) -> None:
        """Init a PostgresDocumentStore."""
        super().__init__(postgres_kvstore, namespace=namespace, batch_size=batch_size)

    @classmethod
    def from_uri(
        cls,
        uri: str,
        namespace: Optional[str] = None,
        table_name: str = "docstore",
        schema_name: str = "public",
        perform_setup: bool = True,
        debug: bool = False,
        use_jsonb: bool = False,
    ) -> "PostgresDocumentStore":
        """Load a PostgresDocumentStore from a Postgres URI."""
        postgres_kvstore = PostgresKVStore.from_uri(
            uri=uri,
            table_name=table_name,
            schema_name=schema_name,
            perform_setup=perform_setup,
            debug=debug,
            use_jsonb=use_jsonb,
        )
        return cls(postgres_kvstore, namespace)

    @classmethod
    def from_params(
        cls,
        host: Optional[str] = None,
        port: Optional[str] = None,
        database: Optional[str] = None,
        user: Optional[str] = None,
        password: Optional[str] = None,
        namespace: Optional[str] = None,
        table_name: str = "docstore",
        schema_name: str = "public",
        perform_setup: bool = True,
        debug: bool = False,
        use_jsonb: bool = False,
    ) -> "PostgresDocumentStore":
        """Load a PostgresDocumentStore from a Postgres host and port."""
        postgres_kvstore = PostgresKVStore.from_params(
            host=host,
            port=port,
            database=database,
            user=user,
            password=password,
            table_name=table_name,
            schema_name=schema_name,
            perform_setup=perform_setup,
            debug=debug,
            use_jsonb=use_jsonb,
        )
        return cls(postgres_kvstore, namespace)

from_uri classmethod #

from_uri(uri: str, namespace: Optional[str] = None, table_name: str = 'docstore', schema_name: str = 'public', perform_setup: bool = True, debug: bool = False, use_jsonb: bool = False) -> PostgresDocumentStore

从Postgres URI加载PostgresDocumentStore。

workflows/handler.py 中的源代码llama_index/storage/docstore/postgres/base.py 
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@classmethod
def from_uri(
    cls,
    uri: str,
    namespace: Optional[str] = None,
    table_name: str = "docstore",
    schema_name: str = "public",
    perform_setup: bool = True,
    debug: bool = False,
    use_jsonb: bool = False,
) -> "PostgresDocumentStore":
    """Load a PostgresDocumentStore from a Postgres URI."""
    postgres_kvstore = PostgresKVStore.from_uri(
        uri=uri,
        table_name=table_name,
        schema_name=schema_name,
        perform_setup=perform_setup,
        debug=debug,
        use_jsonb=use_jsonb,
    )
    return cls(postgres_kvstore, namespace)

from_params classmethod #

from_params(host: Optional[str] = None, port: Optional[str] = None, database: Optional[str] = None, user: Optional[str] = None, password: Optional[str] = None, namespace: Optional[str] = None, table_name: str = 'docstore', schema_name: str = 'public', perform_setup: bool = True, debug: bool = False, use_jsonb: bool = False) -> PostgresDocumentStore

从Postgres主机和端口加载PostgresDocumentStore。

workflows/handler.py 中的源代码llama_index/storage/docstore/postgres/base.py 
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@classmethod
def from_params(
    cls,
    host: Optional[str] = None,
    port: Optional[str] = None,
    database: Optional[str] = None,
    user: Optional[str] = None,
    password: Optional[str] = None,
    namespace: Optional[str] = None,
    table_name: str = "docstore",
    schema_name: str = "public",
    perform_setup: bool = True,
    debug: bool = False,
    use_jsonb: bool = False,
) -> "PostgresDocumentStore":
    """Load a PostgresDocumentStore from a Postgres host and port."""
    postgres_kvstore = PostgresKVStore.from_params(
        host=host,
        port=port,
        database=database,
        user=user,
        password=password,
        table_name=table_name,
        schema_name=schema_name,
        perform_setup=perform_setup,
        debug=debug,
        use_jsonb=use_jsonb,
    )
    return cls(postgres_kvstore, namespace)

选项： 成员：- PostgresDocumentStore