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Diffstat (limited to 'src/interfaces/libpq++/pgcursordb.h')
| -rw-r--r-- | src/interfaces/libpq++/pgcursordb.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/interfaces/libpq++/pgcursordb.h b/src/interfaces/libpq++/pgcursordb.h new file mode 100644 index 0000000000..de1adafb2f --- /dev/null +++ b/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 |
