docs: use alias in WHERE clause of full text search example

bmomjian · bmomjian · commit a6d7e9fb2816 · 2020-03-20T20:19:32.000-04:00
The current doc query specified an alias in the FROM clause and used in it the target list, but not in the WHERE clause. Reported-by: axykon@gmail.com Discussion: https://postgr.es/m/158316348159.30450.16075357948244298217@wrigleys.postgresql.org Backpatch-through: 9.5
diff --git a/doc/src/sgml/textsearch.sgml b/doc/src/sgml/textsearch.sgml
@@ -200,7 +200,7 @@ WHERE mid = 12;
 
 SELECT m.title || ' ' || m.author || ' ' || m.abstract || ' ' || d.body AS document
 FROM messages m, docs d
-WHERE mid = did AND mid = 12;
+WHERE m.mid = d.did AND m.mid = 12;
 </programlisting>
    </para>
 
