protected virtual Command OnCreateTable(IMetadata sourceMetadata, IMetadata targetMetadata, IComparerContext context)
{
var command = new Command();
var isGtt = MetadataRelationType == MetadataRelationType.GlobalTemporaryPreserve || MetadataRelationType == MetadataRelationType.GlobalTemporaryDelete;
var isExternal = MetadataRelationType == MetadataRelationType.External;
command.Append("CREATE ");
if (isGtt)
{
command.Append("GLOBAL TEMPORARY ");
}
command.Append($"TABLE {RelationName.AsSqlIndentifier()} ");
if (isExternal)
{
command.Append($"EXTERNAL '{SqlHelper.DoubleSingleQuotes(ExternalFile)}' ");
}
command.Append("(");
command.AppendLine();
InsertColumns(command, sourceMetadata, targetMetadata, context, false);
command.AppendLine();
command.Append(")");
if (isGtt)
{
command.AppendLine();
command.Append($"ON COMMIT {MetadataRelationType.ToDescription()} ROWS");
}
if (SqlSecurity != null)
{
command.AppendLine();
command.Append($"SQL SECURITY {SqlHelper.SqlSecurityString(SqlSecurity)}");
}
return(command);
}
protected virtual Command OnCreateTable(IMetadata sourceMetadata, IMetadata targetMetadata, IComparerContext context)
{
var command = new Command();
var isGtt = MetadataRelationType == MetadataRelationType.GLOBAL_TEMPORARY_PRESERVE || MetadataRelationType == MetadataRelationType.GLOBAL_TEMPORARY_DELETE;
var isExternal = MetadataRelationType == MetadataRelationType.EXTERNAL;
command.Append("CREATE ");
if (isGtt)
{
command.Append("GLOBAL TEMPORARY ");
}
command.Append($"TABLE {RelationName.AsSqlIndentifier()} ");
if (isExternal)
{
command.Append($"EXTERNAL '{SqlHelper.DoubleSingleQuotes(ExternalFile)}' ");
}
command.Append("(");
command.AppendLine();
InsertColumns(command, sourceMetadata, targetMetadata, context, false);
command.AppendLine();
command.Append(")");
if (isGtt)
{
command.AppendLine();
command.Append($"ON COMMIT {MetadataRelationType.ToDescription()} ROWS");
}
return(command);
}