public IXTable Build(IXTable source, XDatabaseContext context)
{
// Set can be evaluated in parallel, so keep parallel
return(source.WrapParallel(context.Parser, (part) =>
new Set(
part,
context.Parser.NextOutputColumnName(part),
context.Parser.NextColumn(part, context))
));
}
public IXTable Build(IXTable source, XDatabaseContext context)
{
Dictionary <string, string> columnNameMappings = new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
while (context.Parser.HasAnotherPart)
{
columnNameMappings[context.Parser.NextColumnName(source)] = context.Parser.NextOutputColumnName(source);
}
// Rename can be evaluated in parallel, so keep parallel
return(source.WrapParallel(context.Parser, (part) => new Rename(part, columnNameMappings)));
}
public IXTable Build(IXTable source, XDatabaseContext context)
{
List <string> columnNames = new List <string>();
while (context.Parser.HasAnotherPart)
{
columnNames.Add(context.Parser.NextColumnName(source));
}
// Remove can be evaluated in parallel, so keep parallel
return(source.WrapParallel(context.Parser, (part) => new Remove(part, columnNames)));
}
public IXTable Build(IXTable source, XDatabaseContext context)
{
// Select can be evaluated in parallel, so keep parallel
return(source.WrapParallel(context.Parser, (part) =>
{
List <IXColumn> columns = new List <IXColumn>();
do
{
IXColumn column = context.Parser.NextColumn(part, context);
columns.Add(column);
if (String.IsNullOrEmpty(column.ColumnDetails.Name))
{
throw new ArgumentException($"Column {columns.Count} passed to 'Column' wasn't assigned a name. Use 'AS [Name]' to assign names to every column selected.");
}
} while (context.Parser.HasAnotherPart);
return new Select(part, columns);
}));
}
public IXTable Build(IXTable source, XDatabaseContext context)
{
// Where can be evaluated in parallel, so keep parallel
return(source.WrapParallel(context.Parser, (part) => new Where(part, context.Parser.NextExpression(part, context))));
}
public IXTable Build(IXTable source, XDatabaseContext context)
{
// Cast can be evaluated in parallel, so keep parallel
return(source.WrapParallel(context.Parser, (part) => new Cast(part, _castFunctionBuilder.Build(part, context))));
}