A column within a schema. Columns can be nested inside
other columns.
Attributes
Name
Description
column
str
Required. Name of the column.
Must be a UTF-8 string without dots (.).
The maximum size is 64 bytes.
type_
str
Required. Type of the column.
Must be a UTF-8 string with the maximum size of
128 bytes.
description
str
Optional. Description of the column. Default
value is an empty string.
The description must be a UTF-8 string with the
maximum size of 2000 bytes.
mode
str
Optional. A column's mode indicates whether values in this
column are required, nullable, or repeated.
Only ``NULLABLE``, ``REQUIRED``, and ``REPEATED`` values are
supported. Default mode is ``NULLABLE``.
subcolumns
Sequence[google.cloud.datacatalog_v1.types.ColumnSchema]
Optional. Schema of sub-columns. A column can
have zero or more sub-columns.