Coverage for python/lsst/daf/relation/_exceptions.py: 100%

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1# This file is part of daf_relation. 

2# 

3# Developed for the LSST Data Management System. 

4# This product includes software developed by the LSST Project 

5# (http://www.lsst.org). 

6# See the COPYRIGHT file at the top-level directory of this distribution 

7# for details of code ownership. 

8# 

9# This program is free software: you can redistribute it and/or modify 

10# it under the terms of the GNU General Public License as published by 

11# the Free Software Foundation, either version 3 of the License, or 

12# (at your option) any later version. 

13# 

14# This program is distributed in the hope that it will be useful, 

15# but WITHOUT ANY WARRANTY; without even the implied warranty of 

16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

17# GNU General Public License for more details. 

18# 

19# You should have received a copy of the GNU General Public License 

20# along with this program. If not, see <http://www.gnu.org/licenses/>. 

21 

22from __future__ import annotations 

23 

24__all__ = ( 

25 "EngineError", 

26 "ColumnError", 

27 "RelationalAlgebraError", 

28) 

29 

30 

31class RelationalAlgebraError(RuntimeError): 

32 """Exception type raised to indicate problems in the definition of a 

33 relation tree. 

34 """ 

35 

36 

37class EngineError(RelationalAlgebraError): 

38 """Exception type raised to indicate that a relation tree is incompatible 

39 with an engine, or has inconsistent engines. 

40 """ 

41 

42 

43class ColumnError(RelationalAlgebraError): 

44 """Exception type raised to indicate problems in a relation's columns 

45 and/or unique keys. 

46 """