Class ColumnSchema (3.17.2)

Version 3.17.2

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ColumnSchema(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A column within a schema. Columns can be nested inside other columns.

.. _oneof: https://proto-plus-python.readthedocs.io/en/stable/fields.html#oneofs-mutually-exclusive-fields

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.
default_value	str Optional. Default value for the column.
ordinal_position	int Optional. Ordinal position
highest_indexing_type	google.cloud.datacatalog_v1.types.ColumnSchema.IndexingType Optional. Most important inclusion of this column.
subcolumns	MutableSequence[google.cloud.datacatalog_v1.types.ColumnSchema] Optional. Schema of sub-columns. A column can have zero or more sub-columns.
looker_column_spec	google.cloud.datacatalog_v1.types.ColumnSchema.LookerColumnSpec Looker specific column info of this column. This field is a member of oneof_ system_spec.
gc_rule	str Optional. Garbage collection policy for the column or column family. Applies to systems like Cloud Bigtable.

Classes

IndexingType

IndexingType(value)

Specifies inclusion of the column in an index

Values: INDEXING_TYPE_UNSPECIFIED (0): Unspecified. INDEXING_TYPE_NONE (1): Column not a part of an index. INDEXING_TYPE_NON_UNIQUE (2): Column Part of non unique index. INDEXING_TYPE_UNIQUE (3): Column part of unique index. INDEXING_TYPE_PRIMARY_KEY (4): Column part of the primary key.

LookerColumnSpec

LookerColumnSpec(mapping=None, *, ignore_unknown_fields=False, **kwargs)

Column info specific to Looker System.