From: Matt S Trout <mst@shadowcat.co.uk>
Date: Mon, 30 Sep 2019 19:23:32 +0000 (+0000)
Subject: doc is op expander
X-Git-Tag: v1.90_01~59
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=9b49ddc3237d4efe1948503b1a90b869a0c51d4a;p=dbsrgits%2FSQL-Abstract.git

doc is op expander
---

diff --git a/lib/SQL/Abstract/Reference.pm b/lib/SQL/Abstract/Reference.pm
index e1ed68a..343f60a 100644
--- a/lib/SQL/Abstract/Reference.pm
+++ b/lib/SQL/Abstract/Reference.pm
@@ -854,4 +854,33 @@ A non-trivial LHS is expanded with ident as the default rather than value:
   (x, y) IN ( (?, ?), (?, ?) )
   [ 1, 2, 3, 4 ]
 
+=head2 and/or ops
+
+expands the same way as a plain arrayref/hashref expression but with the
+logic type set to the op name.
+
+=head2 is op
+
+Expands is and is_not to null checks, RHS value must be undef:
+
+  # expr
+  { -is => [ 'foo', undef ] }
+
+  # aqt
+  { -op => [ 'is_null', { -ident => [ 'foo' ] } ] }
+
+  # query
+  foo IS NULL
+  []
+
+  # expr
+  { bar => { -is_not => undef } }
+
+  # aqt
+  { -op => [ 'is_not_null', { -ident => [ 'bar' ] } ] }
+
+  # query
+  bar IS NOT NULL
+  []
+
 =cut