public ColumnSchema.Types.FieldElementType RangeElementType { get; set; }
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:
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["\u003cp\u003eThis page provides reference documentation for the \u003ccode\u003eColumnSchema\u003c/code\u003e class within the Google Cloud Data Catalog v1 API for .NET.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eColumnSchema\u003c/code\u003e class represents a column within a schema, which can contain nested sub-columns and is used to define the structure of data entries.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version of \u003ccode\u003eColumnSchema\u003c/code\u003e is 2.14.0, but documentation for other versions is also available, ranging from 1.2.0 up to the latest release.\u003c/p\u003e\n"],["\u003cp\u003eKey properties of the \u003ccode\u003eColumnSchema\u003c/code\u003e class include \u003ccode\u003eColumn\u003c/code\u003e (name), \u003ccode\u003eType\u003c/code\u003e, \u003ccode\u003eMode\u003c/code\u003e (nullable, required, repeated), \u003ccode\u003eDescription\u003c/code\u003e, \u003ccode\u003eSubcolumns\u003c/code\u003e, and \u003ccode\u003eOrdinalPosition\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe ColumnSchema class implements several interfaces such as \u003ccode\u003eIMessage\u003c/code\u003e, \u003ccode\u003eIEquatable\u003c/code\u003e, \u003ccode\u003eIDeepCloneable\u003c/code\u003e, and \u003ccode\u003eIBufferMessage\u003c/code\u003e.\u003c/p\u003e\n"]]],[],null,["# Data Catalog v1 API - Class ColumnSchema (2.16.0)\n\nVersion latestkeyboard_arrow_down\n\n- [2.16.0 (latest)](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/latest/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.15.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.15.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.14.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.14.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.13.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.13.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.12.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.12.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.11.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.11.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.10.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.10.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.9.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.9.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.8.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.8.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.7.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.7.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.6.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.6.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.5.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.5.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.4.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.4.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.3.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.3.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.2.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.2.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.1.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.1.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [2.0.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/2.0.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [1.8.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/1.8.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [1.7.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/1.7.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [1.6.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/1.6.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [1.5.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/1.5.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [1.4.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/1.4.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [1.3.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/1.3.0/Google.Cloud.DataCatalog.V1.ColumnSchema)\n- [1.2.0](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/1.2.0/Google.Cloud.DataCatalog.V1.ColumnSchema) \n\n public sealed class ColumnSchema : IMessage\u003cColumnSchema\u003e, IEquatable\u003cColumnSchema\u003e, IDeepCloneable\u003cColumnSchema\u003e, IBufferMessage, IMessage\n\nReference documentation and code samples for the Data Catalog v1 API class ColumnSchema.\n\nA column within a schema. Columns can be nested inside\nother columns. \n\nInheritance\n-----------\n\n[object](https://learn.microsoft.com/dotnet/api/system.object) \\\u003e ColumnSchema \n\nImplements\n----------\n\n[IMessage](https://cloud.google.com/dotnet/docs/reference/Google.Protobuf/latest/Google.Protobuf.IMessage-1.html)[ColumnSchema](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/latest/Google.Cloud.DataCatalog.V1.ColumnSchema), [IEquatable](https://learn.microsoft.com/dotnet/api/system.iequatable-1)[ColumnSchema](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/latest/Google.Cloud.DataCatalog.V1.ColumnSchema), [IDeepCloneable](https://cloud.google.com/dotnet/docs/reference/Google.Protobuf/latest/Google.Protobuf.IDeepCloneable-1.html)[ColumnSchema](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/latest/Google.Cloud.DataCatalog.V1.ColumnSchema), [IBufferMessage](https://cloud.google.com/dotnet/docs/reference/Google.Protobuf/latest/Google.Protobuf.IBufferMessage.html), [IMessage](https://cloud.google.com/dotnet/docs/reference/Google.Protobuf/latest/Google.Protobuf.IMessage.html) \n\nInherited Members\n-----------------\n\n[object.GetHashCode()](https://learn.microsoft.com/dotnet/api/system.object.gethashcode) \n[object.GetType()](https://learn.microsoft.com/dotnet/api/system.object.gettype) \n[object.ToString()](https://learn.microsoft.com/dotnet/api/system.object.tostring)\n\nNamespace\n---------\n\n[Google.Cloud.DataCatalog.V1](/dotnet/docs/reference/Google.Cloud.DataCatalog.V1/latest/Google.Cloud.DataCatalog.V1)\n\nAssembly\n--------\n\nGoogle.Cloud.DataCatalog.V1.dll\n\nConstructors\n------------\n\n### ColumnSchema()\n\n public ColumnSchema()\n\n### ColumnSchema(ColumnSchema)\n\n public ColumnSchema(ColumnSchema other)\n\nProperties\n----------\n\n### Column\n\n public string Column { get; set; }\n\nRequired. Name of the column.\n\nMust be a UTF-8 string without dots (.).\nThe maximum size is 64 bytes.\n\n### DefaultValue\n\n public string DefaultValue { get; set; }\n\nOptional. Default value for the column.\n\n### Description\n\n public string Description { get; set; }\n\nOptional. Description of the column. Default value is an empty string.\n\nThe description must be a UTF-8 string with the maximum size of 2000\nbytes.\n\n### GcRule\n\n public string GcRule { get; set; }\n\nOptional. Garbage collection policy for the column or column family.\nApplies to systems like Cloud Bigtable.\n\n### HighestIndexingType\n\n public ColumnSchema.Types.IndexingType HighestIndexingType { get; set; }\n\nOptional. Most important inclusion of this column.\n\n### LookerColumnSpec\n\n public ColumnSchema.Types.LookerColumnSpec LookerColumnSpec { get; set; }\n\nLooker specific column info of this column.\n\n### Mode\n\n public string Mode { get; set; }\n\nOptional. A column's mode indicates whether values in this column are\nrequired, nullable, or repeated.\n\nOnly `NULLABLE`, `REQUIRED`, and `REPEATED` values are supported.\nDefault mode is `NULLABLE`.\n\n### OrdinalPosition\n\n public int OrdinalPosition { get; set; }\n\nOptional. Ordinal position\n\n### RangeElementType\n\n public ColumnSchema.Types.FieldElementType RangeElementType { get; set; }\n\nOptional. The subtype of the RANGE, if the type of this field is RANGE. If\nthe type is RANGE, this field is required. Possible values for the field\nelement type of a RANGE include:\n\n- DATE\n- DATETIME\n- TIMESTAMP\n\n### Subcolumns\n\n public RepeatedField\u003cColumnSchema\u003e Subcolumns { get; }\n\nOptional. Schema of sub-columns. A column can have zero or more\nsub-columns.\n\n### SystemSpecCase\n\n public ColumnSchema.SystemSpecOneofCase SystemSpecCase { get; }\n\n### Type\n\n public string Type { get; set; }\n\nRequired. Type of the column.\n\nMust be a UTF-8 string with the maximum size of 128 bytes."]]
