Research page - Unlocked buildings

* The research page now includes a list of buildings unlocked by each
technology when that technology is not in the "unknown" state.

legacyworlds-server-data/db-structure/parts/040-functions/030-tech.sql

@@ -391,6 +391,29 @@ CREATE VIEW tech.buildings_view
 				ON b.name_id = bld.buildable_id;
 
 
+/*
+ * Buildings / technology view
+ * ----------------------------
+ * 
+ * This view generates a parseable list of buildings unlocked by a technology
+ * for each technology.
+ * 
+ * Columns:
+ *		technology_name_id		The technology's name
+ *		technology_buildings	A list of comma-separated building identifiers
+ */
+DROP VIEW IF EXISTS defs.technology_buildings_view CASCADE;
+CREATE VIEW defs.technology_buildings_view
+	AS SELECT technology_name_id ,
+			array_to_string( array_agg( _name.name ) , ',' ) AS technology_buildings
+		FROM defs.technologies _tech
+			LEFT OUTER JOIN tech.buildings_view _building
+				USING ( technology_name_id )
+			LEFT OUTER JOIN defs.strings _name
+				ON _name.id = _building.name_id
+		GROUP BY technology_name_id;
+
+
 --
 -- Ships view
 --

legacyworlds-server-data/db-structure/parts/040-functions/045-empire-research.sql

@@ -447,6 +447,8 @@ CREATE VIEW emp.research_total_weights_view
  *								the technology is not supposed to be visible
  *		technology_dependencies	The technology's dependencies from the
  *									dependencies view
+ *		technology_buildings	The buildings which are unlocked when the
+ *									technology is implemented
  */
 DROP VIEW IF EXISTS emp.technologies_v2_view CASCADE;
 CREATE VIEW emp.technologies_v2_view
@@ -488,7 +490,13 @@ CREATE VIEW emp.technologies_v2_view
 				ELSE
 					NULL::INT
 			END ) AS technology_price ,
-			technology_dependencies
+			technology_dependencies ,
+			( CASE
+				WHEN emptech_visible THEN
+					technology_buildings
+				ELSE
+					''
+			END ) AS technology_buildings
 		FROM emp.technologies_v2
 			INNER JOIN emp.technology_visibility_view
 				USING ( technology_name_id , empire_id )
@@ -496,6 +504,8 @@ CREATE VIEW emp.technologies_v2_view
 				USING ( technology_name_id )
 			INNER JOIN defs.technology_dependencies_view
 				USING ( technology_name_id )
+			INNER JOIN defs.technology_buildings_view
+				USING ( technology_name_id )
 			INNER JOIN defs.strings _name_str
 				ON _name_str.id = _tech.technology_name_id
 			INNER JOIN defs.strings _cat_str