From: Sebastian Hammer <quinn@indexdata.com>
Date: Mon, 1 Dec 2008 05:10:31 +0000 (+0000)
Subject: Added setting to specify pqf prefix, to support database subset selection, etc.
X-Git-Tag: v1.1.0~69
X-Git-Url: http://git.indexdata.com/?a=commitdiff_plain;h=f8892da7570d4e365d36d2de128cc581f5240980;p=pazpar2-moved-to-github.git

Added setting to specify pqf prefix, to support database subset selection, etc.
---

diff --git a/doc/pazpar2_conf.xml b/doc/pazpar2_conf.xml
index b75981d..f81464a 100644
--- a/doc/pazpar2_conf.xml
+++ b/doc/pazpar2_conf.xml
@@ -820,6 +820,19 @@
 	</para>
       </listitem>
     </varlistentry>
+
+    <varlistentry>
+      <term>pz:pqf_prefix</term>
+      <listitem>
+        <para>
+	  Allows you to specify an arbitrary PQF query language substring. The provided
+	  string is prefixed the user's query after it has been normalized to PQF
+	  internally in pazpar2. This allows you to attach complex 'filters' to
+	  queries for a gien target, sometimes necessary to select sub-catalogs
+	  in union catalog systems, etc.
+	</para>
+      </listitem>
+    </varlistentry>
    </variablelist>
   </refsect2>
 
diff --git a/src/client.c b/src/client.c
index 0a8860d..ad63e3c 100644
--- a/src/client.c
+++ b/src/client.c
@@ -591,6 +591,7 @@ int client_parse_query(struct client *cl, const char *query)
     int cerror, cpos;
     CCL_bibset ccl_map = prepare_cclmap(cl);
     const char *sru = session_setting_oneval(sdb, PZ_SRU);
+    const char *pqf_prefix = session_setting_oneval(sdb, PZ_PQF_PREFIX);
 
     if (!ccl_map)
         return -1;
@@ -605,6 +606,11 @@ int client_parse_query(struct client *cl, const char *query)
         return -1;
     }
     wrbuf_rewind(se->wrbuf);
+    if (*pqf_prefix)
+    {
+        wrbuf_puts(se->wrbuf, pqf_prefix);
+        wrbuf_puts(se->wrbuf, " ");
+    }
     ccl_pquery(se->wrbuf, cn);
     xfree(cl->pquery);
     cl->pquery = xstrdup(wrbuf_cstr(se->wrbuf));
diff --git a/src/settings.c b/src/settings.c
index 8ab368a..284ed84 100644
--- a/src/settings.c
+++ b/src/settings.c
@@ -65,6 +65,7 @@ static char *hard_settings[] = {
     "pz:apdulog",
     "pz:sru",
     "pz:sru_version",
+    "pz:pqf_prefix",
     0
 };
 
diff --git a/src/settings.h b/src/settings.h
index ca0af1f..7678ab5 100644
--- a/src/settings.h
+++ b/src/settings.h
@@ -37,6 +37,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 #define PZ_APDULOG       14
 #define PZ_SRU           15
 #define PZ_SRU_VERSION   16
+#define PZ_PQF_PREFIX    17
 
 struct setting
 {