public SourceColumn(SourceColumn column, bool allowNull) // NOT NULL => NULL
{
Source = column.Source;
SourceColumnName = column.SourceColumnName;
ColumnDbType = column.ColumnDbType;
AllowNull = allowNull;
}
protected QueryColumnBase(QueryColumnSourceBase source)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
Source = source;
}
internal bool TryFindSource(string sourceNameOrAlias, out QueryColumnSourceBase source)
{
if (this.sources.TryGetValue(sourceNameOrAlias, out source))
{
return(true);
}
return(false);
}
internal QueryColumnBase AddOutputColumn(QueryColumnBase outputColumn)
{
if (!IsOutputColumnResolved(outputColumn.OutputColumnName, out QueryColumnBase col))
{
QueryColumnSourceBase source = ContainsSourceId(outputColumn.SourceId);
if (source != null)
{
col = AddResolveOutputColumn(new QueryColumnE(source, outputColumn.OutputColumnName, outputColumn.SourceColumnName, outputColumn.ColumnDbType, outputColumn.AllowNull));
}
else
{
if (outputColumn.Source is QuerySourceOnNull)
{
return(AddResolveOutputColumn(outputColumn));
}
else if (outputColumn.Source is QuerySourceOnConstant)
{
return(AddResolveOutputColumn(outputColumn));
}
else if (outputColumn.Source is QuerySourceOnVariable)
{
return(AddResolveOutputColumn(outputColumn));
}
else
{
// APPLY ( SELECT ... => the source is not in this query specification!!
//throw new NotSupportedException("Output column not registered.");
return(AddResolveOutputColumn(outputColumn));
}
}
}
if (!col.ColumnDbType.HasValue)
{
if (outputColumn.ColumnDbType.HasValue)
{
col.SetColumnDbType(outputColumn.ColumnDbType.Value); // mismatched output queries?!?!
}
else
{
// Output column type not resolved!
}
}
if (!outputColumn.ColumnDbType.HasValue)
{
// throw new ArgumentException("Output column type not resolved.", nameof(outputColumn));
}
return(outputColumn);
}
public QueryColumnE(QueryColumnSourceBase source, string outputColumnName, string sourceColumnName, DbType?columnDbType, bool?allowNull)
: base(source)
{
if (string.IsNullOrEmpty(outputColumnName))
{
throw new ArgumentNullException(nameof(outputColumnName));
}
this.outputColumnName = outputColumnName;
this._sourceColumnName = sourceColumnName;
this._columnDbType = columnDbType;
this._allowNull = allowNull;
}
public SourceColumnType(QueryColumnSourceBase source, string sourceColumnName, DbType columnDbType, bool allowNull)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (string.IsNullOrEmpty(sourceColumnName))
{
throw new ArgumentNullException(nameof(sourceColumnName));
}
Source = source;
SourceColumnName = sourceColumnName;
ColumnDbType = columnDbType;
AllowNull = allowNull;
}
internal void AddMqeColumnSource(QueryColumnSourceBase source)
{
sources.Add(source.Key, source);
}
internal void SetTargetAsSource(QueryColumnSourceBase source)
{
_source = source;
}
