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diff --git a/libodb-pgsql/odb/pgsql/pgsql-types.hxx b/libodb-pgsql/odb/pgsql/pgsql-types.hxx
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+++ b/libodb-pgsql/odb/pgsql/pgsql-types.hxx
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+// file      : odb/pgsql/pgsql-types.hxx
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_PGSQL_PGSQL_TYPES_HXX
+#define ODB_PGSQL_PGSQL_TYPES_HXX
+
+#include <odb/pre.hxx>
+
+#include <cstddef>  // std::size_t
+
+#include <odb/pgsql/pgsql-fwd.hxx> // Oid
+
+namespace odb
+{
+  namespace pgsql
+  {
+    // The libpq result binding. This data structures is roughly modeled
+    // after MYSQL_BIND from MySQL.
+    //
+    // Types that may need to grow are bound as pointers to pointers to char
+    // array (normally in details::buffer) in order to allow simple offsetting
+    // in bulk operation support. Note that if we were to do the same for
+    // capacity, we could get rid of the buffer growth tracking altogether.
+    //
+    struct bind
+    {
+      enum buffer_type
+      {
+        boolean_, // Buffer is a bool; size, capacity, truncated are unused.
+        smallint, // Buffer is short; size, capacity, truncated are unused.
+        integer,  // Buffer is int; size, capacity, truncated are unused.
+        bigint,   // Buffer is long long; size, capacity, truncated are unused.
+        real,     // Buffer is float; size, capacity, truncated are unused.
+        double_,  // Buffer is double; size, capacity, truncated are unused.
+        numeric,  // Buffer is a pointer to pointer to char array.
+        date,     // Buffer is int; size, capacity, truncated are unused.
+        time,     // Buffer is long long; size, capacity, truncated are unused.
+        timestamp,// Buffer is long long; size, capacity, truncated are unused.
+        text,     // Buffer is a pointer to pointer to char array.
+        bytea,    // Buffer is a pointer to pointer to char array.
+        bit,      // Buffer is a pointer to char array.
+        varbit,   // Buffer is a pointer to pointer to char array.
+        uuid      // Buffer is a 16-byte char array; size capacity, truncated
+                  // are unused. Note: big-endian, in RFC 4122/4.1.2 order.
+      };
+
+      buffer_type type;
+      void* buffer;
+      std::size_t* size;
+      std::size_t capacity;
+      bool* is_null;
+      bool* truncated;
+    };
+  }
+}
+
+#include <odb/post.hxx>
+
+#endif // ODB_PGSQL_PGSQL_TYPES_HXX