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Teradata.Client.Provider
Entity Table Columns Schema
.NET Data Provider for Teradata > Developer's Guide > ADO.NET Entity Provider for Teradata > Entity Provider Store Schemas > Entity Provider Store Schema Collection > Entity Table Columns Schema
.NET CORE   This feature is not supported by the .NET Core implementation of the Data Provider.

The Columns schema returns information about Columns of any TABLE object by accessing the Advanced SQL Engine Data Dictionary views. It will access DBC.COLUMNS[V] or DBC.COLUMNS[V]X Data Dictionary view based on UseXViews Connection setting.

Column Name Data Type Description
Id String Returns a unique Id for the table COLUMN.
Name String Returns the name of the COLUMN.
Ordinal Int32 Returns the position of the column in the TABLE.
IsNullable Boolean Returns a code to indicate whether or not the column may have a null value:

  • true indicates it may have a null value.
  • false indicates it may not have a null value.
ColumnType TypeSpecification  
ColumnType.TypeName String Returns the SQL Data Type name. TypeName will return the User Defined Type name if the column is a UDT.
ColumnType.MaxLength Int32? Returns the maximum length of the Column for the following Data Types:

  • BYTE or VARBYTE
  • CHAR or VARCHAR
  • BLOB or CLOB
  • Time With Time Zone
  • All Interval Data Types
  • All Period Types
ColumnType.Precision Int32? Returns information about the maximum number of digits (base 10) that can be stored in a Numeric data type:

  • ByteInt, SmallInt, Integer and BigInt
  • Decimal or Numeric
  • Float or Double Precision
ColumnType.DateTimePrecision Int32? Returns information about the maximum numbers of fractional seconds to the right of the decimal point for the following data types:

  • Timestamp and Timestamp With Time Zone
  • Time and Time With Time Zone
  • Interval Day To Second
  • Interval Hour To Second
  • Interval Minute To Second
  • Interval Second
ColumnType.Scale Int32? Returns information about the maximum number of fractional digits (base 10) to the right of the decimal point for Decimal data type.
Collation Collation This field is always set to NULL.
CharacterSet CharacterSet
CharacterSet.CatalogName String This field is always set to NULL.
CharacterSet.SchemaName String This field is always set to NULL.
CharacterSet.Name String Returns information about the column character data type:

  • Unicode
  • KanjiSJIS
  • Graphic
  • Kanji1
  • NULL
ColumnType.IsMultiSet Boolean This field is always set to False.
IsIdentity Boolean Returns:

  • false indicating the column is not identity column.
  • true indicating the column is an identity column.
IsStoreGenerated Boolean This field is always set to False.
Default String Returns any default value assigned to the column.

 

 

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