Add some comments

diff --git a/src/osm-db.c b/src/osm-db.c
index 865e25410b52472e70e3c9218d92038f03241efe..b4ba5ab1136c86085ef9d9fd7030bcdcbe85af37 100644 (file)
--- a/src/osm-db.c
+++ b/src/osm-db.c
@@ -213,6 +213,10 @@ if (w!=NULL) {
 gboolean
 osm_db_prepare(sqlite3 *db)
 {
+/*****************
+ * Place queries *
+ *****************/
+
 /* Select nearest place inside lat,lon+-range */
 DB_PREP(db, "select name,(($LAT-ilat)*($LAT-ilat))+(($LON-ilon)*($LON-ilon)) as d,"
                                        " ilat,ilon,places.nid,isin_p,isin_c "
@@ -231,7 +235,7 @@ DB_PREP(db, "select name,(($LAT-ilat)*($LAT-ilat))+(($LON-ilon)*($LON-ilon)) as
                                        " and places.nid=$NID order by d limit 1",
                                        sql.select_place);
 
-/* Search */
+/* Search place names */
 DB_PREP(db, "select places.nid,name,(($LAT-ilat)*($LAT-ilat))+(($LON-ilon)*($LON-ilon)) as d,"
                                        " rlat,rlon,type,isin_p,isin_c "
                                        " from places,nodes where "
@@ -239,7 +243,10 @@ DB_PREP(db, "select places.nid,name,(($LAT-ilat)*($LAT-ilat))+(($LON-ilon)*($LON
                                        " and name like $NAME order by d limit 200",
                                        sql.select_place_search);
 
-/* Ways */
+/***********************
+ * Way related queries *
+ ***********************/
+
 /* Select nearest ways inside lat,lon+-range */
 DB_PREP(db, "select w.wid,type,nodes,flags,"
                                        "(($LAT-n.ilat)*($LAT-n.ilat))+(($LON-n.ilon)*($LON-n.ilon)) as d,wn.f,wn.t,n.ilat,n.ilon "
@@ -251,6 +258,7 @@ DB_PREP(db, "select w.wid,type,nodes,flags,"
                                        " order by d",
                                        sql.select_way2);
 
+/* Search way names inside bbox, using both primary and secondary language names */
 DB_PREP(db, "select w.wid,w.name as name,"
                                        "(($LAT-ww.lat)*($LAT-ww.lat))+(($LON-ww.lon)*($LON-ww.lon)) as d,ww.lat,ww.lon "
                                        " from way_names as w,way as ww where "
@@ -264,19 +272,21 @@ DB_PREP(db, "select w.wid,w.name as name,"
                                        " ww.type between $WTS and $WTY and w.wid=ww.wid and n.name like $NAME "
                                        " and ww.lat between $LAT-$RANGE and $LAT+$RANGE "
                                        " and ww.lon between $LON-$RANGE and $LON+$RANGE "
-                                       " order by name limit 200",
+                                       " order by d, name limit 500",
                                        sql.select_way_name_search);
 
+/* Get way segment */
 DB_PREP(db, "select wn.t,ilat,ilon from way_n2n as wn,nodes where wid=? and wn.f=? and wn.t=nodes.nid limit 1",
                    sql.select_way_next_seg);
 
+/* Get way segment */
 DB_PREP(db, "select wn.f,ilat,ilon from way_n2n as wn,nodes where wid=? and wn.t=? and wn.f=nodes.nid limit 1",
                    sql.select_way_prev_seg);
 
-/* Way name */
+/* Get Way name */
 DB_PREP(db, "select name from way_names where wid=?", sql.select_way_name);
 
-/* Way ref and int_ref */
+/* Get Way ref and int_ref */
 DB_PREP(db, "select ref,int_ref from way_ref where rid=?", sql.select_way_ref);
 
 /* Get next, prev node + way information. For routing. */