protected override void Generate(AlterColumnType op)
{
using (var sql = this.Writer())
{
sql.Write("ALTER TABLE ");
sql.Write(this.Quote(op.TableName));
sql.WriteLine();
sql.Indent++;
sql.Write("MODIFY ");//ORACLE 中，MODIFY 关键字后没有 COLUMN 关键字。
//Oracle 中如果可空性没有变化时，不能加到 Modify Column 之后。
bool? isRequired = null;
this.GenerateColumnDeclaration(sql, op.ColumnName, op.NewType, op.Length, isRequired, op.IsForeignKey);
this.AddRun(sql);
}
}
protected abstract void Generate(AlterColumnType op);
protected override void Generate(AlterColumnType op)
{
using (var sql = this.Writer())
{
sql.Write("ALTER TABLE ");
sql.Write(this.Quote(op.TableName));
sql.WriteLine();
sql.Indent++;
sql.Write("ALTER COLUMN ");
this.GenerateColumnDeclaration(sql, op.ColumnName, op.NewType, op.Length, op.IsRequired, op.IsForeignKey);
this.AddRun(sql);
}
}
