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-rw-r--r--lib/arel/visitors/to_sql.rb4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/arel/visitors/to_sql.rb b/lib/arel/visitors/to_sql.rb
index 1d8cd35806..554f98da14 100644
--- a/lib/arel/visitors/to_sql.rb
+++ b/lib/arel/visitors/to_sql.rb
@@ -42,6 +42,10 @@ module Arel
# `getconstant` should be a hash lookup, and no object is duped when the
# value of the constant is pushed on the stack. Hence the crazy
# constants below.
+ #
+ # `matches` and `doesNotMatch` operate case-insensitively via Visitor subclasses
+ # specialized for specific databases when necessary.
+ #
WHERE = ' WHERE ' # :nodoc:
SPACE = ' ' # :nodoc: