public async Task <IPhysicalOperator <RowHolder> > BuildStatement(Sql.sqlStatement statement, ITransaction tran, IPhysicalOperator <RowHolder> source, InputStringNormalizer stringNormalizer)
{
if (statement.Joins.Any())
{
IPhysicalOperator <RowHolder> currJoinSource = source;
for (int i = 0; i < statement.Joins.Length; i++)
{
if (!statement.Joins[i].Item2.IsInner)
{
throw new NotSupportedException("Only inner join is supported at this point.");
}
MetadataTable joinRightTable = await this.metadataManager.GetTableManager().GetByName(statement.Joins[i].Item1, tran).ConfigureAwait(false);
PhyOpScan scanOpRight = new PhyOpScan(joinRightTable.Collection, tran, joinRightTable.Columns, joinRightTable.TableName);
Func <RowHolder, bool> filter = (_) => true;
if (FSharpOption <Sql.where> .get_IsSome(statement.Joins[i].Item3))
{
filter = FilterStatementBuilder.EvalWhere(
statement.Joins[i].Item3.Value,
QueryProcessingAccessors.MergeColumns(currJoinSource.GetOutputColumns(), scanOpRight.GetOutputColumns()),
stringNormalizer);
}
currJoinSource = new PhyOpLoopInnerJoin(currJoinSource, scanOpRight, filter);
}
return(currJoinSource);
}
else
{
return(source);
}
}
public Task <IPhysicalOperator <RowHolder> > BuildStatement(Sql.sqlStatement statement, ITransaction tran, IPhysicalOperator <RowHolder> source, InputStringNormalizer inputStringNormalizer)
{
if (FSharpOption <Sql.where> .get_IsSome(statement.Where))
{
Sql.where whereStatement = statement.Where.Value;
IPhysicalOperator <RowHolder> filterOp = new PhyOpFilter(source, FilterStatementBuilder.EvalWhere(whereStatement, source.GetOutputColumns(), inputStringNormalizer));
return(Task.FromResult(filterOp));
}
else
{
return(Task.FromResult(source));
}
}