\dG tests and improvements

Commit 00f4c29 added support to use
expanded mode to all list meta-commands. This commit adds a test to make
sure that the support also works for new metacommand \dG added to list
property graphs.

a14707d introduced relation specific
headers in describe output. Adjust it for property graphs.

Ashutosh Bapat

Author: ashutosh-bapat

src/bin/psql/describe.c

@@ -4291,6 +4291,7 @@ listTables(const char *tabtypes, const char *pattern, bool verbose, bool showSys
 			(showMatViews) ? _("List of materialized views") :
 			(showSeq) ? _("List of sequences") :
 			(showForeign) ? _("List of foreign tables") :
+			(showPropGraphs) ? _("List of property graphs") :
 			"List of ???";		/* should not get here */
 		myopt.translate_header = true;
 		myopt.translate_columns = translate_columns;

src/test/regress/expected/create_property_graph.out

@@ -645,12 +645,20 @@ SELECT pg_get_propgraphdef('pg_type'::regclass);  -- error
 ERROR:  "pg_type" is not a property graph
 \a\t
 \dG g1
-                             List of relations
+                          List of property graphs
            Schema            | Name |      Type      |        Owner        
 -----------------------------+------+----------------+---------------------
  create_property_graph_tests | g1   | property graph | regress_graph_user1
 (1 row)
 
+\dGx g1
+List of property graphs
+-[ RECORD 1 ]-----------------------
+Schema | create_property_graph_tests
+Name   | g1
+Type   | property graph
+Owner  | regress_graph_user1
+
 -- TODO
 \d g1
 Property graph "create_property_graph_tests.g1"

src/test/regress/sql/create_property_graph.sql

@@ -248,6 +248,7 @@ SELECT pg_get_propgraphdef('pg_type'::regclass);  -- error
 \a\t
 
 \dG g1
+\dGx g1
 
 -- TODO
 \d g1