Resolve "Improve GENERATED support"

pglablib/catalog/PgSequence.h

@@ -5,23 +5,44 @@
 
 class PgSequence: public PgClass {
 public:
+    enum Direction {
+        Ascending,
+        Descending
+    };
+
+    // values that define the trigger
+    // in recent versions from the catalog
 	Oid typid = InvalidOid;
-	int64_t last = 0;
 	int64_t start = 0;
 	int64_t increment = 0;
 	int64_t max = 0;
 	int64_t min = 0;
 	int64_t cache = 0;
-	int64_t log = 0;
 	bool cycled = false;
-	bool called = false;
 
 	bool priv_usage = false;
 	bool priv_select = false;
 	bool priv_update = false;
 
+    // Sequence state data, retrieved by SELECTing the sequence
+    int64_t last = 0;
+    int64_t log = 0; // shows how many fetches are left before new wal log
+    bool called = false;
+
 	using PgClass::PgClass;
 	QString createSql() const;
+
+    Direction direction() const
+    {
+        return increment < 0 ? Descending : Ascending;
+    }
+    int64_t defaultMin() const;
+    int64_t defaultMax() const;
+    int64_t defaultStart() const;
+    int64_t defaultIncrement() const;
+    int64_t defaultCache() const;
+    // other option defaults are 1
+    QString nonDefaultOptionsString() const;
 };
 
 #endif // PGSEQUENCE_H