/// <summary>
/// Get the SQL string to drop this Constraint in the database.
/// </summary>
/// <param name="dialect">The <see cref="Dialect.Dialect"/> to use for SQL rules.</param>
/// <param name="defaultCatalog"></param>
/// <param name="defaultSchema"></param>
/// <returns>
/// A string that contains the SQL to drop this Constraint.
/// </returns>
public override string SqlDropString(Dialect.Dialect dialect, string defaultCatalog, string defaultSchema)
{
string ifExists = dialect.GetIfExistsDropConstraint(Table, Name);
string drop = string.Format("alter table {0}{1}", Table.GetQualifiedName(dialect, defaultCatalog, defaultSchema), dialect.GetDropPrimaryKeyConstraintString(Name));
string end = dialect.GetIfExistsDropConstraintEnd(Table, Name);
return ifExists + Environment.NewLine + drop + Environment.NewLine + end;
}
public static string BuildSqlDropIndexString(Dialect.Dialect dialect, Table table, string name, string defaultCatalog, string defaultSchema)
{
string ifExists = dialect.GetIfExistsDropConstraint(table, name);
string drop = string.Format("drop index {0}", StringHelper.Qualify(table.GetQualifiedName(dialect, defaultCatalog, defaultSchema), name));
string end = dialect.GetIfExistsDropConstraintEnd(table, name);
return ifExists + Environment.NewLine + drop + Environment.NewLine + end;
}
/// <summary>
/// Get the SQL string to drop this Constraint in the database.
/// </summary>
/// <param name="dialect">The <see cref="Dialect.Dialect"/> to use for SQL rules.</param>
/// <param name="defaultCatalog"></param>
/// <param name="defaultSchema"></param>
/// <returns>
/// A string that contains the SQL to drop this Constraint.
/// </returns>
public override string SqlDropString(Dialect.Dialect dialect, string defaultCatalog, string defaultSchema)
{
var useCatalog = "";
if (!String.IsNullOrEmpty(Table.Catalog))
{
useCatalog = string.Format("use {0} ", Table.Catalog);
}
string ifExists = dialect.GetIfExistsDropConstraint(Table, Name);
string drop = string.Format("alter table {0}{1}", Table.GetQualifiedName(dialect, defaultCatalog, defaultSchema), dialect.GetDropPrimaryKeyConstraintString(Name));
string end = dialect.GetIfExistsDropConstraintEnd(Table, Name);
return useCatalog + ifExists + Environment.NewLine + drop + Environment.NewLine + end;
}
/// <summary>
/// Generates the SQL string to drop this Constraint in the database.
/// </summary>
/// <param name="dialect">The <see cref="Dialect.Dialect"/> to use for SQL rules.</param>
/// <param name="defaultSchema"></param>
/// <param name="defaultCatalog"></param>
/// <returns>
/// A string that contains the SQL to drop this Constraint.
/// </returns>
public virtual string SqlDropString(Dialect.Dialect dialect, string defaultCatalog, string defaultSchema)
{
if (IsGenerated(dialect))
{
string ifExists = dialect.GetIfExistsDropConstraint(Table, Name);
string drop =
string.Format("alter table {0} drop constraint {1}", Table.GetQualifiedName(dialect, defaultCatalog, defaultSchema), Name);
string end = dialect.GetIfExistsDropConstraintEnd(Table, Name);
return ifExists + System.Environment.NewLine + drop + System.Environment.NewLine + end;
}
else
{
return null;
}
}