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SqlServerMigrationsSqlGenerator.DropDefaultConstraint Metode

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Definisi

Ruang nama:
Microsoft.EntityFrameworkCore.Migrations
Rakitan:
Microsoft.EntityFrameworkCore.SqlServer.dll
Paket:
Microsoft.EntityFrameworkCore.SqlServer v1.0.6
Paket:
Microsoft.EntityFrameworkCore.SqlServer v1.1.6
Paket:
Microsoft.EntityFrameworkCore.SqlServer v2.0.3
Paket:
Microsoft.EntityFrameworkCore.SqlServer v2.1.11
Paket:
Microsoft.EntityFrameworkCore.SqlServer v2.2.6
Paket:
Microsoft.EntityFrameworkCore.SqlServer v3.0.0
Paket:
Microsoft.EntityFrameworkCore.SqlServer v3.1.0
Paket:
Microsoft.EntityFrameworkCore.SqlServer v5.0.0
Paket:
Microsoft.EntityFrameworkCore.SqlServer v6.0.0
Paket:
Microsoft.EntityFrameworkCore.SqlServer v7.0.0
Paket:
Microsoft.EntityFrameworkCore.SqlServer v8.0.0

Menghasilkan fragmen SQL untuk menghilangkan batasan default untuk kolom.

protected virtual void DropDefaultConstraint (string schema, string tableName, string columnName, Microsoft.EntityFrameworkCore.Migrations.MigrationCommandListBuilder builder);
protected virtual void DropDefaultConstraint (string? schema, string tableName, string columnName, Microsoft.EntityFrameworkCore.Migrations.MigrationCommandListBuilder builder);
abstract member DropDefaultConstraint : string * string * string * Microsoft.EntityFrameworkCore.Migrations.MigrationCommandListBuilder -> unit
override this.DropDefaultConstraint : string * string * string * Microsoft.EntityFrameworkCore.Migrations.MigrationCommandListBuilder -> unit
Protected Overridable Sub DropDefaultConstraint (schema As String, tableName As String, columnName As String, builder As MigrationCommandListBuilder)

Parameter

schema
String

Skema yang berisi tabel.

tableName
String

Tabel yang berisi kolom.

columnName
String

Kolom .

builder
MigrationCommandListBuilder

Penyusun perintah yang digunakan untuk menambahkan fragmen SQL.

Berlaku untuk