/// <summary>
/// Outputs statements for dropping of aggregates that exist no more.
/// </summary>
/// <param name="writer">Writer the output should be written to.</param>
/// <param name="oldSchema">Original schema.</param>
/// <param name="newSchema">New schema.</param>
/// <param name="searchPathHelper">Search path helper.</param>
public static void Drop(StreamWriter writer, [NullGuard.AllowNull] PgSchema oldSchema, PgSchema newSchema, SearchPathHelper searchPathHelper)
{
if (oldSchema == null)
{
return;
}
// Drop aggregates that exist no more
foreach (PgAggregate oldAggregate in oldSchema.Aggregates)
{
if (!newSchema.ContainsAggregate(oldAggregate.Signature))
{
searchPathHelper.OutputSearchPath(writer);
writer.WriteLine();
writer.WriteLine(oldAggregate.DropSQL);
}
}
}
