public async Task <IPhysicalOperator <RowHolder> > BuildStatement(Sql.sqlStatement statement, ITransaction tran, IPhysicalOperator <RowHolder> source, InputStringNormalizer stringNormalizer)
{
if (source != null)
{
// For now source for scan must be null.
// with subquery expression this will change.
throw new ArgumentException();
}
string tableName = statement.Table;
MetadataTablesManager tableManager = metadataManager.GetTableManager();
MetadataTable table = await tableManager.GetByName(tableName, tran).ConfigureAwait(false);
// Since we currently don't support indexes we can only build scan operation.
return(new PhyOpScan(table.Collection, tran, table.Columns, table.TableName));
}
public async Task <PhyOpTableInsert> ParseInsertStatement(Sql.insertStatement insertStatement, ITransaction tran, InputStringNormalizer stringNormalizer)
{
string tableName = insertStatement.Table;
MetadataTablesManager tableManager = metadataManager.GetTableManager();
MetadataTable table = await tableManager.GetByName(tableName, tran).ConfigureAwait(false);
ColumnInfo[] columnInfosFromTable = table.Columns.Select(mt => mt.ColumnType).ToArray();
RowHolder rowHolder = new RowHolder(columnInfosFromTable);
int colNum = 0;
foreach (var value in insertStatement.Values)
{
if (value.IsFloat)
{
if (columnInfosFromTable[colNum].ColumnType == ColumnType.Double)
{
rowHolder.SetField <double>(colNum, ((Sql.value.Float)value).Item);
}
else
{
throw new InvalidColumnTypeException();
}
}
else if (value.IsInt)
{
if (columnInfosFromTable[colNum].ColumnType == ColumnType.Int)
{
rowHolder.SetField <int>(colNum, ((Sql.value.Int)value).Item);
}
else if (columnInfosFromTable[colNum].ColumnType == ColumnType.Double)
{
// Int can be cast to double without data loss.
rowHolder.SetField <double>(colNum, (double)((Sql.value.Int)value).Item);
}
else
{
throw new InvalidColumnTypeException();
}
}
else if (value.IsString)
{
if (columnInfosFromTable[colNum].ColumnType == ColumnType.String)
{
// TODO: For string heap (strings of variable length separate logic is needed.
string input = ((Sql.value.String)value).Item;
input = stringNormalizer.ApplyReplacementTokens(input);
rowHolder.SetField(colNum, input.ToCharArray());
}
else
{
throw new InvalidColumnTypeException();
}
}
else
{
throw new ArgumentException();
}
colNum++;
}
PhyOpStaticRowProvider opStatic = new PhyOpStaticRowProvider(rowHolder);
PhyOpTableInsert op = new PhyOpTableInsert(table.Collection, opStatic);
return(op);
}