ColumnTypeInfo¶

class lsst.daf.butler.ColumnTypeInfo(timespan_cls: type[lsst.daf.butler.core.timespan.TimespanDatabaseRepresentation], universe: DimensionUniverse, dataset_id_spec: FieldSpec, run_key_spec: FieldSpec)¶

A struct that aggregates information about column types that can differ across data repositories due to Registry and dimension configuration.

Methods Summary

Create a specification for a table with the given relation columns.

Methods Documentation

make_relation_table_spec(columns: Iterable[ColumnTag], unique_keys: Iterable[Iterable[ColumnTag]] = ()) → TableSpec¶

Create a specification for a table with the given relation columns.

This is used primarily to create temporary tables for query results.

Parameters:

columnsIterable [ ColumnTag ]: Iterable of column identifiers.
unique_keysIterable [ Iterable [ ColumnTag ] ]: Unique constraints to add the table, as a nested iterable of (first) constraint and (second) the columns within that constraint.

Returns: