Bring in Leo's <lsh@lubrizol.com> massive changes to libpq++

src/interfaces/libpq++/pgcursordb.h

@@ -0,0 +1,61 @@
+/*-------------------------------------------------------------------------
+ *
+ * pgcursordb.h
+ *    
+ *
+ *   DESCRIPTION
+ *		Postgres Cursor Database Class: 
+ *		   Query Postgres backend using a cursor
+ *
+ *   NOTES
+ *      Currently under construction.
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ *-------------------------------------------------------------------------
+ */
+ 
+#ifndef PGCURSOR_H
+#define PGCURSOR_H
+
+#include "pgtransdb.h"
+
+
+// ****************************************************************
+//
+// PgCursor - a class for querying databases using a cursor
+//
+// ****************************************************************
+// This is the database access class that declares a cursor and
+// manipulates data through it.  The interface will introduce some
+// ease of use through the methods that will allow cursor specific
+// operations, like fetch, forward, etc.
+class PgCursor : public PgTransaction {
+public:
+  PgCursor(const char* dbName, const char* cursor);	// use reasonable defaults
+  // connect to the database with given environment and database name
+  PgCursor(const PgEnv& env, const char* dbName, const char* cursor);
+  PgCursor(const PgConnection&, const char* cursor);
+  virtual ~PgCursor();	// close connection and clean up
+  
+  // Commands associated with cursor interface
+  int Declare(const string& query, int binary = 0);	// Declare a cursor with given name
+  int Fetch(const char* dir = "FORWARD");		// Fetch ALL tuples in given direction
+  int Fetch(unsigned num, const char* dir = "FORWARD");	// Fetch specified amount of tuples
+  int Close();	// Close the cursor
+  
+  // Accessors to the cursor name
+  const char* Cursor() const { return pgCursor.c_str(); }
+  void Cursor(const string& cursor) { pgCursor = cursor; }
+  
+protected:
+  int Fetch(const string& num, const string& dir);
+  
+protected:
+  string pgCursor;
+  
+protected:
+  PgCursor() : PgTransaction() {}	// Do not connect
+}; // End PgCursor Class Declaration
+
+#endif	// PGCURSOR_H