Class ColumnSchema (3.19.0)

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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.
range_element_type	google.cloud.datacatalog_v1.types.ColumnSchema.FieldElementType Optional. The subtype of the RANGE, if the type of this field is RANGE. If the type is RANGE, this field is required. Possible values for the field element type of a RANGE include: - DATE - DATETIME - TIMESTAMP
gc_rule	str Optional. Garbage collection policy for the column or column family. Applies to systems like Cloud Bigtable.

Classes

FieldElementType

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

Represents the type of a field element.

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.