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alter_collection_field()

This operation changes the specified collection field parameters.

Request Syntax​

alter_collection_field(
    collection_name: str, 
    field_name: str, 
    field_params: Dict,
    db_name="",
    timeout: Optional[float] = None,
    **kwargs,
)

PARAMETERS:

  • collection_name (str) -

    The name of the target collection.

  • field_name (str) -

    The name of the target field.

  • field_params (dict) -

    The field parameters to change. The properties not mentioned remains unchanged. Possible parameters vary with the field type.

    • max_length (int) -

      The maximum byte length for strings allowed to be inserted. Note that multibyte characters (e.g., Unicode characters) may occupy more than one byte each, so ensure the byte length of inserted strings does not exceed the specified limit. Value range: [1, 65,535].

      This is mandatory for a DataType.VARCHAR field.

    • max_capacity (int) -

      The number of elements in an Array field value.

      This is mandatory for a DataType.ARRAY field.

    • mmap_enabled (bool) -

      Whether Milvus maps the field data into memory instead of fully loading it. For details settings, refer to MMap-enabled Data Storage.

  • timeout (Optional[float]) -

    The timeout duration for this operation.

    Setting this to None indicates that this operation timeouts when any response arrives or any error occurs.

RETURN TYPE:

NoneType

RETURNS:

None

EXCEPTIONS:

  • MilvusException

    This exception will be raised when any error occurs during this operation, especially when the specified alias does not exist.

Example​

from pymilvus import MilvusClient

# 1. Create a milvus client
client = MilvusClient(
    uri="https://inxx-xxxxxxxxxxxx.api.gcp-us-west1.zillizcloud.com:19530",
    token="user:password"
)

# upsert properties
field_params = {"max_length": 1500}

client.alter_collection_field(
    collection_name="collection_name", 
    field_name="my_varchar",
    field_params=field_params
)