Class: RDO::MySQL::Driver

Inherits:
Driver
  • Object
show all
Defined in:
lib/rdo/mysql/driver.rb

Overview

Principal RDO driver class for MySQL.

Instance Method Summary collapse

Instance Method Details

#close ⇒ Object

Close the connection to MySQL



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# File 'ext/rdo_mysql/driver.c', line 104

static VALUE rdo_mysql_driver_close(VALUE self) {
  RDOMySQLDriver * driver;
  Data_Get_Struct(self, RDOMySQLDriver, driver);

  mysql_close(driver->conn);
  driver->conn     = NULL;
  driver->is_open  = 0;
  driver->encoding = -1;

  return Qtrue;
}

#execute(*, self) ⇒ Object

Execute a statement with possible bind parameters



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# File 'ext/rdo_mysql/driver.c', line 169

static VALUE rdo_mysql_driver_execute(int argc, VALUE * args, VALUE self) {
  if (argc < 1) {
    rb_raise(rb_eArgError, "wrong number of arguments (0 for 1)");
  }

  RDOMySQLDriver * driver;
  Data_Get_Struct(self, RDOMySQLDriver, driver);

  if (!(driver->is_open)) {
    RDO_ERROR("Cannot execute query: connection is not open");
  }

  rdo_mysql_driver_normalize_date_times_bang(&args[1], argc - 1);
  rdo_mysql_driver_normalize_sets_bang(&args[1], argc - 1);

  VALUE stmt = RDO_INTERPOLATE(self, args, argc);

  if (mysql_real_query(driver->conn,
        RSTRING_PTR(stmt),
        RSTRING_LEN(stmt)) != 0) {
    RDO_ERROR("Failed to execute query: %s", mysql_error(driver->conn));
  }

  MYSQL_RES * res = mysql_store_result(driver->conn);

  return RDO_RESULT(rdo_mysql_tuple_list_new(res, driver->encoding),
      rdo_mysql_result_info_new(driver->conn, res));
}

#open ⇒ Object

Open a connection to MySQL



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# File 'ext/rdo_mysql/driver.c', line 52

static VALUE rdo_mysql_driver_open(VALUE self) {
  RDOMySQLDriver * driver;
  Data_Get_Struct(self, RDOMySQLDriver, driver);

  if (driver->is_open) {
    return Qtrue;
  }

  if (!(driver->conn = mysql_init(NULL))) {
    RDO_ERROR("Failed to connect to MySQL. Could not allocate memory.");
  }

  VALUE host = rb_funcall(self, rb_intern("host"), 0);
  VALUE port = rb_funcall(self, rb_intern("port"), 0);
  VALUE user = rb_funcall(self, rb_intern("user"), 0);
  VALUE pass = rb_funcall(self, rb_intern("password"), 0);
  VALUE db   = rb_funcall(self, rb_intern("database"), 0);

  Check_Type(host, T_STRING);
  Check_Type(port, T_FIXNUM);
  Check_Type(user, T_STRING);
  Check_Type(pass, T_STRING);
  Check_Type(db,   T_STRING);

  if (!mysql_real_connect(driver->conn,
        RSTRING_PTR(host),
        RSTRING_PTR(user),
        RSTRING_PTR(pass),
        RSTRING_PTR(db),
        NUM2INT(port),
        NULL, // UNIX socket
        0)) {
    RDO_ERROR("MySQL connection failed: %s", mysql_error(driver->conn));
  } else {
    driver->is_open  = 1;
    driver->encoding = rb_enc_find_index(
        RSTRING_PTR(rb_funcall(self, rb_intern("encoding"), 0)));
    rb_funcall(self, rb_intern("after_open"), 0);
  }

  return Qtrue;
}

#open? ⇒ Boolean

Return true if the connection is open

Returns:

  • (Boolean) 


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# File 'ext/rdo_mysql/driver.c', line 96

static VALUE rdo_mysql_driver_open_p(VALUE self) {
  RDOMySQLDriver * driver;
  Data_Get_Struct(self, RDOMySQLDriver, driver);

  return driver->is_open ? Qtrue : Qfalse;
}

#quote(obj) ⇒ Object

Quote values for safe insertion into a statement



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# File 'ext/rdo_mysql/driver.c', line 117

static VALUE rdo_mysql_driver_quote(VALUE self, VALUE obj) {
  if (TYPE(obj) != T_STRING) {
    obj = RDO_OBJ_TO_S(obj);
  }

  RDOMySQLDriver * driver;
  Data_Get_Struct(self, RDOMySQLDriver, driver);

  if (!(driver->is_open)) {
    RDO_ERROR("Unable to quote value: connection is closed");
  }

  char quoted[RSTRING_LEN(obj) * 2 + 1];

  mysql_real_escape_string(driver->conn,
      quoted, RSTRING_PTR(obj), RSTRING_LEN(obj));

  return rb_str_new2(quoted);
}