private void MergeConstraints(DataTable table)
{
for (int i = 0; i < table.Constraints.Count; i++)
{
Constraint constraint2 = table.Constraints[i];
Constraint constraint = constraint2.Clone(this.dataSet, this._IgnoreNSforTableLookup);
if (constraint == null)
{
this.dataSet.RaiseMergeFailed(table, Res.GetString("DataMerge_MissingConstraint", new object[] { constraint2.GetType().FullName, constraint2.ConstraintName }), this.missingSchemaAction);
}
else
{
Constraint constraint3 = constraint.Table.Constraints.FindConstraint(constraint);
if (constraint3 == null)
{
if (MissingSchemaAction.Add == this.missingSchemaAction)
{
try
{
constraint.Table.Constraints.Add(constraint);
}
catch (DuplicateNameException)
{
constraint.ConstraintName = "";
constraint.Table.Constraints.Add(constraint);
}
}
else if (MissingSchemaAction.Error == this.missingSchemaAction)
{
this.dataSet.RaiseMergeFailed(table, Res.GetString("DataMerge_MissingConstraint", new object[] { constraint2.GetType().FullName, constraint2.ConstraintName }), this.missingSchemaAction);
}
}
else
{
this.MergeExtendedProperties(constraint2.ExtendedProperties, constraint3.ExtendedProperties);
}
}
}
}
private void MergeConstraints(DataTable table)
{
// Merge constraints
for (int i = 0; i < table.Constraints.Count; i++)
{
Constraint src = table.Constraints[i];
Constraint dest = src.Clone(dataSet, _IgnoreNSforTableLookup);
if (dest == null)
{
dataSet.RaiseMergeFailed(table,
Res.GetString(Res.DataMerge_MissingConstraint, src.GetType().FullName, src.ConstraintName),
missingSchemaAction
);
}
else
{
Constraint cons = dest.Table.Constraints.FindConstraint(dest);
if (cons == null)
{
if (MissingSchemaAction.Add == missingSchemaAction)
{
try {
// try to keep the original name
dest.Table.Constraints.Add(dest);
}
catch (DuplicateNameException) {
// if fail, assume default name
dest.ConstraintName = "";
dest.Table.Constraints.Add(dest);
}
}
else if (MissingSchemaAction.Error == missingSchemaAction)
{
dataSet.RaiseMergeFailed(table,
Res.GetString(Res.DataMerge_MissingConstraint, src.GetType().FullName, src.ConstraintName),
missingSchemaAction
);
}
}
else
{
MergeExtendedProperties(src.ExtendedProperties, cons.ExtendedProperties);
}
}
}
}
public string GetSQLConstraintRemove(Constraint constraint)
{
if (constraint is PrimaryKeyConstraint)
return GetSQLConstraintRemove(constraint as PrimaryKeyConstraint);
if (constraint is UniqueConstraint)
return string.Format("DROP INDEX `{0}` ON `{1}`", constraint.Name, constraint.Table.Name);
if (constraint is CheckConstraint)
throw new NotImplementedException("SQLite doesn't support check constraints. Use trigger.");
if (constraint is ForeignKeyConstraint)
return string.Format("ALTER TABLE `{0}` DROP FOREIGN KEY `{1}`", constraint.Table.Name, constraint.Name);
throw new Exception("Unknown constraint type: " + constraint.GetType().Name);
}
public string GetSQLConstraintAdd(Constraint constraint)
{
if (constraint == null)
return "";
if (constraint is PrimaryKeyConstraint)
return GetSQLConstraintAdd(constraint as PrimaryKeyConstraint);
if (constraint is UniqueConstraint)
return GetSQLConstraintAdd(constraint as UniqueConstraint);
if (constraint is CheckConstraint)
return GetSQLConstraintAdd(constraint as CheckConstraint);
if (constraint is ForeignKeyConstraint)
return GetSQLConstraintAdd(constraint as ForeignKeyConstraint);
throw new Exception("Unknown constraint type: " + constraint.GetType().Name);
}
/// <summary>
/// 打印 Constraint 基本.
/// </summary>
/// <param name="sb">输出缓冲区.</param>
/// <param name="indent">缩进.</param>
/// <param name="obj">对象.</param>
private static void PrintConstraint_base(StringBuilder sb, int indent, Constraint obj)
{
int indentnext = indent + 1;
String indentstr = GetIndentStr(indent);
sb.AppendLine(string.Format("{0}# <{1}>", indentstr, obj.GetType().FullName));
sb.AppendLine(string.Format("{0}ConstraintName:\t{1}", indentstr, obj.ConstraintName));
sb.AppendLine(string.Format("{0}Table:\t{1}", indentstr, obj.Table.TableName));
sb.AppendLine(string.Format("{0}ExtendedProperties:\t{1}", indentstr, obj.ExtendedProperties));
PrintPropertyCollection(sb, indentnext, obj.ExtendedProperties);
}
