MigrationBuilder.AlterColumn Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Overloads
AlterColumn<T>(String, String, String, Nullable<Boolean>, Nullable<Int32>, Boolean, String, Boolean, Object, String, String)
public virtual Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation> AlterColumn<T> (string name, string table, string type = default, bool? unicode = default, int? maxLength = default, bool rowVersion = false, string schema = default, bool nullable = false, object defaultValue = default, string defaultValueSql = default, string computedColumnSql = default);abstract member AlterColumn : string * string * string * Nullable<bool> * Nullable<int> * bool * string * bool * obj * string * string -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation>
override this.AlterColumn : string * string * string * Nullable<bool> * Nullable<int> * bool * string * bool * obj * string * string -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation>Public Overridable Function AlterColumn(Of T) (name As String, table As String, Optional type As String = Nothing, Optional unicode As Nullable(Of Boolean) = Nothing, Optional maxLength As Nullable(Of Integer) = Nothing, Optional rowVersion As Boolean = false, Optional schema As String = Nothing, Optional nullable As Boolean = false, Optional defaultValue As Object = Nothing, Optional defaultValueSql As String = Nothing, Optional computedColumnSql As String = Nothing) As OperationBuilder(Of AlterColumnOperation)Type Parameters
- T
Parameters
- name
- String
- table
- String
- type
- String
- rowVersion
- Boolean
- schema
- String
- nullable
- Boolean
- defaultValue
- Object
- defaultValueSql
- String
- computedColumnSql
- String
Returns
Applies to
AlterColumn<T>(String, String, String, Nullable<Boolean>, Nullable<Int32>, Boolean, String, Boolean, Object, String, String, Type, String, Nullable<Boolean>, Nullable<Int32>, Boolean, Boolean, Object, String, String)
- Source:
- MigrationBuilder.cs
- Source:
- MigrationBuilder.cs
Builds an AlterColumnOperation to alter an existing column.
public virtual Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.AlterOperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation> AlterColumn<T> (string name, string table, string type = default, bool? unicode = default, int? maxLength = default, bool rowVersion = false, string schema = default, bool nullable = false, object defaultValue = default, string defaultValueSql = default, string computedColumnSql = default, Type oldClrType = default, string oldType = default, bool? oldUnicode = default, int? oldMaxLength = default, bool oldRowVersion = false, bool oldNullable = false, object oldDefaultValue = default, string oldDefaultValueSql = default, string oldComputedColumnSql = default);public virtual Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.AlterOperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation> AlterColumn<T> (string name, string table, string type, bool? unicode, int? maxLength, bool rowVersion, string schema, bool nullable, object defaultValue, string defaultValueSql, string computedColumnSql, Type oldClrType, string oldType, bool? oldUnicode, int? oldMaxLength, bool oldRowVersion, bool oldNullable, object oldDefaultValue, string oldDefaultValueSql, string oldComputedColumnSql);abstract member AlterColumn : string * string * string * Nullable<bool> * Nullable<int> * bool * string * bool * obj * string * string * Type * string * Nullable<bool> * Nullable<int> * bool * bool * obj * string * string -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.AlterOperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation>
override this.AlterColumn : string * string * string * Nullable<bool> * Nullable<int> * bool * string * bool * obj * string * string * Type * string * Nullable<bool> * Nullable<int> * bool * bool * obj * string * string -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.AlterOperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation>Public Overridable Function AlterColumn(Of T) (name As String, table As String, Optional type As String = Nothing, Optional unicode As Nullable(Of Boolean) = Nothing, Optional maxLength As Nullable(Of Integer) = Nothing, Optional rowVersion As Boolean = false, Optional schema As String = Nothing, Optional nullable As Boolean = false, Optional defaultValue As Object = Nothing, Optional defaultValueSql As String = Nothing, Optional computedColumnSql As String = Nothing, Optional oldClrType As Type = Nothing, Optional oldType As String = Nothing, Optional oldUnicode As Nullable(Of Boolean) = Nothing, Optional oldMaxLength As Nullable(Of Integer) = Nothing, Optional oldRowVersion As Boolean = false, Optional oldNullable As Boolean = false, Optional oldDefaultValue As Object = Nothing, Optional oldDefaultValueSql As String = Nothing, Optional oldComputedColumnSql As String = Nothing) As AlterOperationBuilder(Of AlterColumnOperation)Public Overridable Function AlterColumn(Of T) (name As String, table As String, type As String, unicode As Nullable(Of Boolean), maxLength As Nullable(Of Integer), rowVersion As Boolean, schema As String, nullable As Boolean, defaultValue As Object, defaultValueSql As String, computedColumnSql As String, oldClrType As Type, oldType As String, oldUnicode As Nullable(Of Boolean), oldMaxLength As Nullable(Of Integer), oldRowVersion As Boolean, oldNullable As Boolean, oldDefaultValue As Object, oldDefaultValueSql As String, oldComputedColumnSql As String) As AlterOperationBuilder(Of AlterColumnOperation)Type Parameters
- T
The CLR type that the column is mapped to.
Parameters
- name
- String
The column name.
- table
- String
The name of the table that contains the column.
- type
- String
The store/database type of the column.
Indicates whether or not the column can contain Unicode data, or null if not specified or not applicable.
The maximum length of data that can be stored in the column, or null if not specified or not applicable.
- rowVersion
- Boolean
Indicates whether or not the column acts as an automatic concurrency token, such as a rowversion/timestamp column in SQL Server.
- schema
- String
The schema that contains the table, or null if the default schema should be used.
- nullable
- Boolean
Indicates whether or not the column can store NULL values.
- defaultValue
- Object
The default value for the column.
- defaultValueSql
- String
The SQL expression to use for the column's default constraint.
- computedColumnSql
- String
The SQL expression to use to compute the column value.
- oldClrType
- Type
The CLR type that the column was previously mapped to. Can be null, in which case previous value is considered unknown.
- oldType
- String
The previous store/database type of the column. Can be null, in which case previous value is considered unknown.
Indicates whether or not the column could previously contain Unicode data, or null if not specified or not applicable.
The previous maximum length of data that can be stored in the column, or null if not specified or not applicable.
- oldRowVersion
- Boolean
Indicates whether or not the column previously acted as an automatic concurrency token, such as a rowversion/timestamp column
in SQL Server. Can be null, in which case previous value is considered unknown.
- oldNullable
- Boolean
Indicates whether or not the column could previously store NULL values. Can be null, in which case previous value is
considered unknown.
- oldDefaultValue
- Object
The previous default value for the column. Can be null, in which case previous value is considered unknown.
- oldDefaultValueSql
- String
The previous SQL expression used for the column's default constraint. Can be null, in which case previous value is considered
unknown.
- oldComputedColumnSql
- String
The previous SQL expression used to compute the column value. Can be null, in which case previous value is considered unknown.
Returns
A builder to allow annotations to be added to the operation.
Applies to
AlterColumn<T>(String, String, String, Nullable<Boolean>, Nullable<Int32>, Boolean, String, Boolean, Object, String, String, Type, String, Nullable<Boolean>, Nullable<Int32>, Boolean, Boolean, Object, String, String, Nullable<Boolean>, Nullable<Boolean>)
- Source:
- MigrationBuilder.cs
- Source:
- MigrationBuilder.cs
Builds an AlterColumnOperation to alter an existing column.
public virtual Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.AlterOperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation> AlterColumn<T> (string name, string table, string type = default, bool? unicode = default, int? maxLength = default, bool rowVersion = false, string schema = default, bool nullable = false, object defaultValue = default, string defaultValueSql = default, string computedColumnSql = default, Type oldClrType = default, string oldType = default, bool? oldUnicode = default, int? oldMaxLength = default, bool oldRowVersion = false, bool oldNullable = false, object oldDefaultValue = default, string oldDefaultValueSql = default, string oldComputedColumnSql = default, bool? fixedLength = default, bool? oldFixedLength = default);abstract member AlterColumn : string * string * string * Nullable<bool> * Nullable<int> * bool * string * bool * obj * string * string * Type * string * Nullable<bool> * Nullable<int> * bool * bool * obj * string * string * Nullable<bool> * Nullable<bool> -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.AlterOperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation>
override this.AlterColumn : string * string * string * Nullable<bool> * Nullable<int> * bool * string * bool * obj * string * string * Type * string * Nullable<bool> * Nullable<int> * bool * bool * obj * string * string * Nullable<bool> * Nullable<bool> -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.AlterOperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation>Public Overridable Function AlterColumn(Of T) (name As String, table As String, Optional type As String = Nothing, Optional unicode As Nullable(Of Boolean) = Nothing, Optional maxLength As Nullable(Of Integer) = Nothing, Optional rowVersion As Boolean = false, Optional schema As String = Nothing, Optional nullable As Boolean = false, Optional defaultValue As Object = Nothing, Optional defaultValueSql As String = Nothing, Optional computedColumnSql As String = Nothing, Optional oldClrType As Type = Nothing, Optional oldType As String = Nothing, Optional oldUnicode As Nullable(Of Boolean) = Nothing, Optional oldMaxLength As Nullable(Of Integer) = Nothing, Optional oldRowVersion As Boolean = false, Optional oldNullable As Boolean = false, Optional oldDefaultValue As Object = Nothing, Optional oldDefaultValueSql As String = Nothing, Optional oldComputedColumnSql As String = Nothing, Optional fixedLength As Nullable(Of Boolean) = Nothing, Optional oldFixedLength As Nullable(Of Boolean) = Nothing) As AlterOperationBuilder(Of AlterColumnOperation)Type Parameters
- T
The CLR type that the column is mapped to.
Parameters
- name
- String
The column name.
- table
- String
The name of the table that contains the column.
- type
- String
The store/database type of the column.
Indicates whether or not the column can contain Unicode data, or null if not specified or not applicable.
The maximum length of data that can be stored in the column, or null if not specified or not applicable.
- rowVersion
- Boolean
Indicates whether or not the column acts as an automatic concurrency token, such as a rowversion/timestamp column in SQL Server.
- schema
- String
The schema that contains the table, or null if the default schema should be used.
- nullable
- Boolean
Indicates whether or not the column can store NULL values.
- defaultValue
- Object
The default value for the column.
- defaultValueSql
- String
The SQL expression to use for the column's default constraint.
- computedColumnSql
- String
The SQL expression to use to compute the column value.
- oldClrType
- Type
The CLR type that the column was previously mapped to. Can be null, in which case previous value is considered unknown.
- oldType
- String
The previous store/database type of the column. Can be null, in which case previous value is considered unknown.
Indicates whether or not the column could previously contain Unicode data, or null if not specified or not applicable.
The previous maximum length of data that can be stored in the column, or null if not specified or not applicable.
- oldRowVersion
- Boolean
Indicates whether or not the column previously acted as an automatic concurrency token, such as a rowversion/timestamp column
in SQL Server. Can be null, in which case previous value is considered unknown.
- oldNullable
- Boolean
Indicates whether or not the column could previously store NULL values. Can be null, in which case previous value is
considered unknown.
- oldDefaultValue
- Object
The previous default value for the column. Can be null, in which case previous value is considered unknown.
- oldDefaultValueSql
- String
The previous SQL expression used for the column's default constraint. Can be null, in which case previous value is considered
unknown.
- oldComputedColumnSql
- String
The previous SQL expression used to compute the column value. Can be null, in which case previous value is considered unknown.
Indicates whether or not the column is constrained to fixed-length data.
Indicates whether or not the column was previously constrained to fixed-length data.
Returns
A builder to allow annotations to be added to the operation.
Applies to
AlterColumn<T>(String, String, String, Nullable<Boolean>, Nullable<Int32>, Boolean, String, Boolean, Object, String, String, Type, String, Nullable<Boolean>, Nullable<Int32>, Boolean, Boolean, Object, String, String, Nullable<Boolean>, Nullable<Boolean>, String, String)
- Source:
- MigrationBuilder.cs
- Source:
- MigrationBuilder.cs
Builds an AlterColumnOperation to alter an existing column.
public virtual Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.AlterOperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation> AlterColumn<T> (string name, string table, string type = default, bool? unicode = default, int? maxLength = default, bool rowVersion = false, string schema = default, bool nullable = false, object defaultValue = default, string defaultValueSql = default, string computedColumnSql = default, Type oldClrType = default, string oldType = default, bool? oldUnicode = default, int? oldMaxLength = default, bool oldRowVersion = false, bool oldNullable = false, object oldDefaultValue = default, string oldDefaultValueSql = default, string oldComputedColumnSql = default, bool? fixedLength = default, bool? oldFixedLength = default, string comment = default, string oldComment = default);abstract member AlterColumn : string * string * string * Nullable<bool> * Nullable<int> * bool * string * bool * obj * string * string * Type * string * Nullable<bool> * Nullable<int> * bool * bool * obj * string * string * Nullable<bool> * Nullable<bool> * string * string -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.AlterOperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation>
override this.AlterColumn : string * string * string * Nullable<bool> * Nullable<int> * bool * string * bool * obj * string * string * Type * string * Nullable<bool> * Nullable<int> * bool * bool * obj * string * string * Nullable<bool> * Nullable<bool> * string * string -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.AlterOperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation>Public Overridable Function AlterColumn(Of T) (name As String, table As String, Optional type As String = Nothing, Optional unicode As Nullable(Of Boolean) = Nothing, Optional maxLength As Nullable(Of Integer) = Nothing, Optional rowVersion As Boolean = false, Optional schema As String = Nothing, Optional nullable As Boolean = false, Optional defaultValue As Object = Nothing, Optional defaultValueSql As String = Nothing, Optional computedColumnSql As String = Nothing, Optional oldClrType As Type = Nothing, Optional oldType As String = Nothing, Optional oldUnicode As Nullable(Of Boolean) = Nothing, Optional oldMaxLength As Nullable(Of Integer) = Nothing, Optional oldRowVersion As Boolean = false, Optional oldNullable As Boolean = false, Optional oldDefaultValue As Object = Nothing, Optional oldDefaultValueSql As String = Nothing, Optional oldComputedColumnSql As String = Nothing, Optional fixedLength As Nullable(Of Boolean) = Nothing, Optional oldFixedLength As Nullable(Of Boolean) = Nothing, Optional comment As String = Nothing, Optional oldComment As String = Nothing) As AlterOperationBuilder(Of AlterColumnOperation)Type Parameters
- T
The CLR type that the column is mapped to.
Parameters
- name
- String
The column name.
- table
- String
The name of the table that contains the column.
- type
- String
The store/database type of the column.
Indicates whether or not the column can contain Unicode data, or null if not specified or not applicable.
The maximum length of data that can be stored in the column, or null if not specified or not applicable.
- rowVersion
- Boolean
Indicates whether or not the column acts as an automatic concurrency token, such as a rowversion/timestamp column in SQL Server.
- schema
- String
The schema that contains the table, or null if the default schema should be used.
- nullable
- Boolean
Indicates whether or not the column can store NULL values.
- defaultValue
- Object
The default value for the column.
- defaultValueSql
- String
The SQL expression to use for the column's default constraint.
- computedColumnSql
- String
The SQL expression to use to compute the column value.
- oldClrType
- Type
The CLR type that the column was previously mapped to. Can be null, in which case previous value is considered unknown.
- oldType
- String
The previous store/database type of the column. Can be null, in which case previous value is considered unknown.
Indicates whether or not the column could previously contain Unicode data, or null if not specified or not applicable.
The previous maximum length of data that can be stored in the column, or null if not specified or not applicable.
- oldRowVersion
- Boolean
Indicates whether or not the column previously acted as an automatic concurrency token, such as a rowversion/timestamp column
in SQL Server. Can be null, in which case previous value is considered unknown.
- oldNullable
- Boolean
Indicates whether or not the column could previously store NULL values. Can be null, in which case previous value is
considered unknown.
- oldDefaultValue
- Object
The previous default value for the column. Can be null, in which case previous value is considered unknown.
- oldDefaultValueSql
- String
The previous SQL expression used for the column's default constraint. Can be null, in which case previous value is considered
unknown.
- oldComputedColumnSql
- String
The previous SQL expression used to compute the column value. Can be null, in which case previous value is considered unknown.
Indicates whether or not the column is constrained to fixed-length data.
Indicates whether or not the column was previously constrained to fixed-length data.
- comment
- String
A comment to associate with the column.
- oldComment
- String
The previous comment to associate with the column.
Returns
A builder to allow annotations to be added to the operation.
Applies to
AlterColumn<T>(String, String, String, Nullable<Boolean>, Nullable<Int32>, Boolean, String, Boolean, Object, String, String, Type, String, Nullable<Boolean>, Nullable<Int32>, Boolean, Boolean, Object, String, String, Nullable<Boolean>, Nullable<Boolean>, String, String, String, String, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, Nullable<Boolean>)
- Source:
- MigrationBuilder.cs
- Source:
- MigrationBuilder.cs
- Source:
- MigrationBuilder.cs
- Source:
- MigrationBuilder.cs
- Source:
- MigrationBuilder.cs
Builds an AlterColumnOperation to alter an existing column.
public virtual Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.AlterOperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation> AlterColumn<T> (string name, string table, string type = default, bool? unicode = default, int? maxLength = default, bool rowVersion = false, string schema = default, bool nullable = false, object defaultValue = default, string defaultValueSql = default, string computedColumnSql = default, Type oldClrType = default, string oldType = default, bool? oldUnicode = default, int? oldMaxLength = default, bool oldRowVersion = false, bool oldNullable = false, object oldDefaultValue = default, string oldDefaultValueSql = default, string oldComputedColumnSql = default, bool? fixedLength = default, bool? oldFixedLength = default, string comment = default, string oldComment = default, string collation = default, string oldCollation = default, int? precision = default, int? oldPrecision = default, int? scale = default, int? oldScale = default, bool? stored = default, bool? oldStored = default);public virtual Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.AlterOperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation> AlterColumn<T> (string name, string table, string? type = default, bool? unicode = default, int? maxLength = default, bool rowVersion = false, string? schema = default, bool nullable = false, object? defaultValue = default, string? defaultValueSql = default, string? computedColumnSql = default, Type? oldClrType = default, string? oldType = default, bool? oldUnicode = default, int? oldMaxLength = default, bool oldRowVersion = false, bool oldNullable = false, object? oldDefaultValue = default, string? oldDefaultValueSql = default, string? oldComputedColumnSql = default, bool? fixedLength = default, bool? oldFixedLength = default, string? comment = default, string? oldComment = default, string? collation = default, string? oldCollation = default, int? precision = default, int? oldPrecision = default, int? scale = default, int? oldScale = default, bool? stored = default, bool? oldStored = default);abstract member AlterColumn : string * string * string * Nullable<bool> * Nullable<int> * bool * string * bool * obj * string * string * Type * string * Nullable<bool> * Nullable<int> * bool * bool * obj * string * string * Nullable<bool> * Nullable<bool> * string * string * string * string * Nullable<int> * Nullable<int> * Nullable<int> * Nullable<int> * Nullable<bool> * Nullable<bool> -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.AlterOperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation>
override this.AlterColumn : string * string * string * Nullable<bool> * Nullable<int> * bool * string * bool * obj * string * string * Type * string * Nullable<bool> * Nullable<int> * bool * bool * obj * string * string * Nullable<bool> * Nullable<bool> * string * string * string * string * Nullable<int> * Nullable<int> * Nullable<int> * Nullable<int> * Nullable<bool> * Nullable<bool> -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.AlterOperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AlterColumnOperation>Public Overridable Function AlterColumn(Of T) (name As String, table As String, Optional type As String = Nothing, Optional unicode As Nullable(Of Boolean) = Nothing, Optional maxLength As Nullable(Of Integer) = Nothing, Optional rowVersion As Boolean = false, Optional schema As String = Nothing, Optional nullable As Boolean = false, Optional defaultValue As Object = Nothing, Optional defaultValueSql As String = Nothing, Optional computedColumnSql As String = Nothing, Optional oldClrType As Type = Nothing, Optional oldType As String = Nothing, Optional oldUnicode As Nullable(Of Boolean) = Nothing, Optional oldMaxLength As Nullable(Of Integer) = Nothing, Optional oldRowVersion As Boolean = false, Optional oldNullable As Boolean = false, Optional oldDefaultValue As Object = Nothing, Optional oldDefaultValueSql As String = Nothing, Optional oldComputedColumnSql As String = Nothing, Optional fixedLength As Nullable(Of Boolean) = Nothing, Optional oldFixedLength As Nullable(Of Boolean) = Nothing, Optional comment As String = Nothing, Optional oldComment As String = Nothing, Optional collation As String = Nothing, Optional oldCollation As String = Nothing, Optional precision As Nullable(Of Integer) = Nothing, Optional oldPrecision As Nullable(Of Integer) = Nothing, Optional scale As Nullable(Of Integer) = Nothing, Optional oldScale As Nullable(Of Integer) = Nothing, Optional stored As Nullable(Of Boolean) = Nothing, Optional oldStored As Nullable(Of Boolean) = Nothing) As AlterOperationBuilder(Of AlterColumnOperation)Type Parameters
- T
The CLR type that the column is mapped to.
Parameters
- name
- String
The column name.
- table
- String
The name of the table that contains the column.
- type
- String
The store/database type of the column.
Indicates whether or not the column can contain Unicode data, or null if not specified or not applicable.
The maximum length of data that can be stored in the column, or null if not specified or not applicable.
- rowVersion
- Boolean
Indicates whether or not the column acts as an automatic concurrency token, such as a rowversion/timestamp column in SQL Server.
- schema
- String
The schema that contains the table, or null if the default schema should be used.
- nullable
- Boolean
Indicates whether or not the column can store null values.
- defaultValue
- Object
The default value for the column.
- defaultValueSql
- String
The SQL expression to use for the column's default constraint.
- computedColumnSql
- String
The SQL expression to use to compute the column value.
- oldClrType
- Type
The CLR type that the column was previously mapped to. Can be null, in which case previous value is considered
unknown.
- oldType
- String
The previous store/database type of the column. Can be null, in which case previous value is considered unknown.
Indicates whether or not the column could previously contain Unicode data, or null if not specified or not
applicable.
The previous maximum length of data that can be stored in the column, or null if not specified or not applicable.
- oldRowVersion
- Boolean
Indicates whether or not the column previously acted as an automatic concurrency token, such as a rowversion/timestamp column
in SQL Server. Can be null, in which case previous value is considered unknown.
- oldNullable
- Boolean
Indicates whether or not the column could previously store null values. Can be null, in which
case previous value is
considered unknown.
- oldDefaultValue
- Object
The previous default value for the column. Can be null, in which case previous value is considered unknown.
- oldDefaultValueSql
- String
The previous SQL expression used for the column's default constraint. Can be null, in which case previous value is
considered
unknown.
- oldComputedColumnSql
- String
The previous SQL expression used to compute the column value. Can be null, in which case previous value is
considered unknown.
Indicates whether or not the column is constrained to fixed-length data.
Indicates whether or not the column was previously constrained to fixed-length data.
- comment
- String
A comment to associate with the column.
- oldComment
- String
The previous comment to associate with the column.
- collation
- String
A collation to apply to the column.
- oldCollation
- String
The previous collation to apply to the column.
The maximum number of digits that is allowed in this column, or null if not specified or not applicable.
The previous maximum number of digits that is allowed in this column, or null if not specified or not applicable.
The maximum number of decimal places that is allowed in this column, or null if not specified or not applicable.
The previous maximum number of decimal places that is allowed in this column, or null if not specified or not
applicable.
Whether the value of the previous computed column was stored in the database or not.
Returns
A builder to allow annotations to be added to the operation.
Remarks
See Database migrations for more information and examples.
Applies to
Entity Framework