OdbcRollback Function

Action

Rolls back the current transaction. All SQL statements since the last call of the OdbcConnect, OdbcCommit or OdbcRollback function are rolled back.

Include file

ODBC.bdh

Syntax

OdbcRollback( in hConnection : number ): boolean;

Return value

true if successful
false otherwise

Parameter	Description
hConnection	Handle to a database connection.

Example

var
  hEnv, hDbc : number;
  cCursor    : cursor;

dcltrans
  transaction TMain
  begin
    OdbcAlloc(SQL_HANDLE_ENV, hEnv);
    OdbcAlloc(SQL_HANDLE_DBC, hDbc, hEnv);
    OdbcConnect(hDbc, "DSN=database;UID=user;PWD=pass;");
    OdbcOpen(cCursor, hDbc);
    OdbcPrepare(cCursor, sqlInsert);
    OdbcBind(cCursor, ":1", SQL_C_CHAR, 32);
    OdbcBind(cCursor, ":2", SQL_C_LONG);
    OdbcSetString(cCursor, ":1", "Bob", 1);
    OdbcSetInt(cCursor, ":2", 25, 1);
    OdbcSetString(cCursor, ":1", "Marcy", 2);
    OdbcSetInt(cCursor, ":2", 33, 2);
    OdbcExecute(cCursor);
    OdbcClose(cCursor, SQL_DROP);
    OdbcRollback(hDbc);
    OdbcDisconnect(hDbc);
    OdbcFree(hDbc);
    OdbcFree(hEnv);
  end TMain;

dclsql
  sqlInsert:
    INSERT INTO persons (name, age) VALUES (?, ?);