Initial project import

tools/v/vlib/db/pg/compatibility.h

@@ -0,0 +1,16 @@
+
+#if !defined(PG_VERSION_NUM)
+#error VERROR_MESSAGE PG_VERSION_NUM is not defined. Please install the development headers for PostgreSQL, they are usually in a package named libpq-dev
+#endif
+
+#if PG_VERSION_NUM < 100000
+	#define CONNECTION_CHECK_WRITABLE 9
+#endif
+
+#if PG_VERSION_NUM < 100000
+	#define CONNECTION_CONSUME 10
+#endif
+
+#if PG_VERSION_NUM < 120000
+	#define CONNECTION_GSS_STARTUP 11
+#endif