diff --git a/src/bin/psql/command.c b/src/bin/psql/command.c
index 49d4c0e3ce..c450972f27 100644
--- a/src/bin/psql/command.c
+++ b/src/bin/psql/command.c
@@ -769,7 +769,10 @@ exec_command_d(PsqlScanState scan_state, bool active_branch, const char *cmd)
 				success = describeTablespaces(pattern, show_verbose);
 				break;
 			case 'c':
-				success = listConversions(pattern, show_verbose, show_system);
+				if (strncmp(cmd, "dco", 3) == 0 || strncmp(cmd, "dcoS", 4) == 0) /* Constraint */
+					success = listConstraints(pattern, show_system);
+				else
+					success = listConversions(pattern, show_verbose, show_system); /* Conversion */
 				break;
 			case 'C':
 				success = listCasts(pattern, show_verbose);
diff --git a/src/bin/psql/describe.c b/src/bin/psql/describe.c
index ea721d963a..bd1ec2df5f 100644
--- a/src/bin/psql/describe.c
+++ b/src/bin/psql/describe.c
@@ -4815,6 +4815,61 @@ listExtendedStats(const char *pattern)
 	return true;
 }
 
+/*
+ * \dco
+ *
+ * Describes constraints
+ */
+bool
+listConstraints(const char *pattern, bool showSystem)
+{
+	PQExpBufferData buf;
+	PGresult   *res;
+	printQueryOpt myopt = pset.popt;
+
+	initPQExpBuffer(&buf);
+	printfPQExpBuffer(&buf,
+					  "SELECT \n"
+					  "n.nspname AS \"%s\", \n"
+					  "cst.conname AS \"%s\", \n"
+					  "pg_catalog.pg_get_constraintdef(cst.oid) AS \"%s\", \n"
+					  "c.relname AS \"%s\" \n"
+					  "FROM pg_constraint cst \n"
+					  "JOIN pg_namespace n ON n.oid = cst.connamespace \n"
+					  "JOIN pg_class c ON c.oid = cst.conrelid \n",
+					  gettext_noop("Schema"),
+					  gettext_noop("Name"),
+					  gettext_noop("Definition"),
+					  gettext_noop("Table")
+	);
+
+	if (!showSystem && !pattern)
+		appendPQExpBufferStr(&buf,
+							 "WHERE n.nspname <> 'pg_catalog' \n"
+							 "  AND n.nspname <> 'information_schema' \n");
+
+	processSQLNamePattern(pset.db, &buf, pattern,
+						  !showSystem && !pattern, false,
+						  "n.nspname", "cst.conname",
+						  NULL, "pg_catalog.pg_table_is_visible(cst.conrelid)");
+
+	appendPQExpBufferStr(&buf, "ORDER BY 1, 2, 3;");
+
+	res = PSQLexec(buf.data);
+	termPQExpBuffer(&buf);
+	if (!res)
+		return false;
+
+	myopt.nullPrint = NULL;
+	myopt.title = _("List of constsraints");
+	myopt.translate_header = true;
+
+	printQuery(res, &myopt, pset.queryFout, false, pset.logfile);
+
+	PQclear(res);
+	return true;
+}
+
 /*
  * \dC
  *
diff --git a/src/bin/psql/describe.h b/src/bin/psql/describe.h
index 71b320f1fc..53e51db036 100644
--- a/src/bin/psql/describe.h
+++ b/src/bin/psql/describe.h
@@ -76,6 +76,9 @@ extern bool listDomains(const char *pattern, bool verbose, bool showSystem);
 /* \dc */
 extern bool listConversions(const char *pattern, bool verbose, bool showSystem);
 
+/* \dco */
+extern bool listConstraints(const char *pattern, bool showSystem);
+
 /* \dC */
 extern bool listCasts(const char *pattern, bool verbose);