public async Task <bool> Exists(TableCreateDefinition def, ITransaction tran)
{
await foreach (RowHolder rh in pageListCollection.Iterate(tran))
{
PagePointerOffsetPair stringPointer = rh.GetField <PagePointerOffsetPair>(1);
if (def.TableName == new string(await stringHeap.Fetch(stringPointer, tran)))
{
return(true);
}
}
return(false);
}
public async IAsyncEnumerable <MetadataColumn> Iterate(ITransaction tran)
{
await foreach (RowHolder rh in pageListCollection.Iterate(tran))
{
PagePointerOffsetPair stringPointer = rh.GetField <PagePointerOffsetPair>(MetadataColumn.ColumnNameColumnPos);
char[] columnName = await this.stringHeap.Fetch(stringPointer, tran);
yield return(new MetadataColumn(
rh.GetField <int>(MetadataColumn.ColumnIdColumnPos),
rh.GetField <int>(MetadataColumn.TableIdColumnPos),
new string(columnName),
new ColumnInfo((ColumnType)rh.GetField <int>(MetadataColumn.ColumnTypeColumnPos), rh.GetField <int>(MetadataColumn.ColumnTypeLength))));
}
}