Reorganize files in pglablib

The enitities and containers of the catalog now go into catalog subfolder
Models go into model

pglablib/catalog/PgAttribute.h

@@ -0,0 +1,46 @@
+#ifndef PGATTRIBUTE_H
+#define PGATTRIBUTE_H
+
+#include "Pgsql_declare.h"
+#include <QString>
+#include <libpq-fe.h>
+#include <tuple>
+
+class PgClass;
+class PgDatabaseCatalog;
+
+class PgAttribute {
+public:
+	using Key = std::tuple<Oid, int16_t>;
+
+	Oid relid = InvalidOid;
+	QString name;
+	Oid typid = InvalidOid;
+	int32_t stattarget = 0;
+	int16_t num = 0;
+	int32_t ndims = 0; // array dimensions
+	int32_t typmod = -1;
+	bool notnull = false;
+	bool hasdef = false;
+	char identity = ' ';
+	bool isdropped = false;
+	bool islocal = true;
+	Oid collation = InvalidOid;
+	QString acl;
+	QString options;
+
+	QString defaultValue; ///< Comes from pg_attrdef table
+
+
+	bool operator==(Key _k) const { return relid == std::get<0>(_k) && num == std::get<1>(_k); }
+	bool operator==(const QString &n) const { return name == n; }
+	bool operator<(Key _k) const { return relid < std::get<0>(_k) || (relid == std::get<0>(_k) && num < std::get<1>(_k)); }
+	bool operator<(const PgAttribute &rhs) const { return relid < rhs.relid || (relid == rhs.relid && num < rhs.num); }
+
+	/// Return the part of the SQL create statement that can be reused for both the CREATE TABLE and ALTER TABLE ADD COLUMN
+	QString columnDefinition(const PgDatabaseCatalog &cat) const;
+	QString alterTableAddColumn(const PgDatabaseCatalog &cat, const PgClass &table) const;
+	QString alterTableDropColumn(const PgDatabaseCatalog &cat, const PgClass &table) const;
+};
+
+#endif // PGATTRIBUTE_H