diff options
Diffstat (limited to 'lib/sql_algebra/relations/predicates/equality_predicate.rb')
| -rw-r--r-- | lib/sql_algebra/relations/predicates/equality_predicate.rb | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/sql_algebra/relations/predicates/equality_predicate.rb b/lib/sql_algebra/relations/predicates/equality_predicate.rb new file mode 100644 index 0000000000..2d206e6c12 --- /dev/null +++ b/lib/sql_algebra/relations/predicates/equality_predicate.rb @@ -0,0 +1,7 @@ +class EqualityPredicate < BinaryPredicate + def ==(other) + self.class == other.class and + ((attribute1.eql?(other.attribute1) and attribute2.eql?(other.attribute2)) or + (attribute1.eql?(other.attribute2) and attribute2.eql?(other.attribute1))) + end +end
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