List all databases in the Mochow instance.

Returns:
    str: A string containing the names of all databases.

Create a database in the Mochow instance.

Args:
    database_name (str): Name of the database.

Returns:
    str: A message indicating the success of database creation.

Switch to a different database.

Args:
    database_name (str): Name of the database to use.

Returns:
    str: A message indicating the success of the database switch.

List all tables in the current database.

Returns:
    str: A string containing the names of all tables.

Describe table details in the Mochow instance.

Args:
    table_name (str): Name of the table to describe.

Returns:
    str: A string containing the details of the table.

Get the table statistics in the Mochow instance.

Args:
    table_name (str): Name of the table to get statistics.

Returns:
    str: A string containing the table statistics.

Create a vector index on a vector type field in the Mochow instance.

Args:
    table_name (str): Name of the table.
    index_name (str): Name of the index.
    field_name (str): Name of the vector field.
    index_type (str): Type of vector index. Supported values are "HNSW", "HNSWPQ", "HNSWSQ".
    metric_type (str): Distance metric. Supported values are "L2", "COSINE", "IP".
    params (Optional[dict[str, Any]]): Additional vector index parameters.

Returns:
    str: A message indicating the success of index creation.

Describe index details in the Mochow instance.

Args:
    table_name (str): Name of the table.
    index_name (str): Name of the index to describe.

Returns:
    str: A string containing the details of the index.

Rebuild the vector index in the Mochow instance.

Args:
    table_name (str): Name of the table.
    index_name (str): Name of the vector index to rebuild.

Returns:
    str: A message indicating the success of index rebuild initiation.

Delete rows with a filter expression in the Mochow instance.

Args:
    table_name (str): Name of the table.
    filter_expr (str): Filter expression to select data to delete.

Returns:
    str: A message indicating the success of data deletion.

Drop the vector index in the Mochow instance.

Args:
    table_name (str): Name of the table.
    index_name (str): Name of the vector index to drop.

Returns:
    str: A message indicating the success of index drop.

Select rows with a filter expression in the Mochow instance.

Args:
    table_name (str): Name of the table.
    filter_expr (str): Filter expression to select data. Defaults to None.
    limit (int): Maximum number of results. Defaults to 10.
    output_fields (Optional[list[str]]): Fields to return in the results. Defaults to None.

Returns:
    str: A string containing the selected rows.

Perform vector similarity search combining vector similarity and scalar attribute filtering in the Mochow instance.

Args:
    table_name (str): Name of the table to search.
    vector (list[float]): Search vector.
    vector_field (str): Target field containing vectors to search. Defaults to "vector".
    limit (int): Maximum number of results. Defaults to 10.
    output_fields (Optional[list[str]]): Fields to return in the results. Defaults to None.
    filter_expr (Optional[str]): Filter expression for scalar attributes. Defaults to None.
    params: Additional vector search parameters

Returns:
    str: A string containing the vector search results.

Perform full text search combining BM25 similarity and scalar attribute filtering in the Mochow instance.

Args:
    table_name (str): Name of the table to search.
    index_name (str): Name of the inverted index to perform full text search.
    search_text (str): Text to search.
    limit (int): Maximum number of results. Defaults to 10.
    output_fields (Optional[list[str]]): Fields to return in the results. Defaults to None.

Returns:
    str: A string containing the full text search results.