Class: Swift::DB::Mysql::Statement

Inherits:
Object
  • Object
show all
Defined in:
ext/swift/db/mysql/statement.c

Instance Method Summary collapse

Constructor Details

#initialize(adapter, sql) ⇒ Object 



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# File 'ext/swift/db/mysql/statement.c', line 53

VALUE db_mysql_statement_initialize(VALUE self, VALUE adapter, VALUE sql) {
    MYSQL *connection;
    Statement *s = db_mysql_statement_handle(self);

    s->adapter   = adapter;
    connection   = db_mysql_adapter_handle_safe(adapter)->connection;
    s->statement = mysql_stmt_init(connection);
    sql          = TO_S(sql);

    if (mysql_stmt_prepare(s->statement, RSTRING_PTR(sql), RSTRING_LEN(sql)) != 0)
        rb_raise(eSwiftRuntimeError, "%s", mysql_stmt_error(s->statement));

    return self;
}

Instance Method Details

#execute(*args) ⇒ Object 



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# File 'ext/swift/db/mysql/statement.c', line 75

VALUE db_mysql_statement_execute(int argc, VALUE *argv, VALUE self) {
    int n;
    VALUE bind, data, result, typecast_bind;
    MYSQL_BIND *mysql_bind;
    char MYSQL_BOOL_TRUE = 1, MYSQL_BOOL_FALSE = 0;

    Statement *s = db_mysql_statement_handle_safe(self);
    Command command = {.statement = s->statement, .status = 0};

    rb_scan_args(argc, argv, "00*", &bind);

    mysql_stmt_free_result(s->statement);

    if (RARRAY_LEN(bind) > 0) {
        n = mysql_stmt_param_count(s->statement);
        if (RARRAY_LEN(bind) != n)
            rb_raise(eSwiftArgumentError, "expected %d bind arguments got %d instead", n, RARRAY_LEN(bind));
        mysql_bind = (MYSQL_BIND *)malloc(sizeof(MYSQL_BIND) * RARRAY_LEN(bind));
        memset(mysql_bind, 0, sizeof(MYSQL_BIND) * RARRAY_LEN(bind));

        typecast_bind = rb_ary_new();
        rb_gc_register_address(&typecast_bind);
        rb_gc_register_address(&bind);
        for (n = 0; n < RARRAY_LEN(bind); n++) {
            data = rb_ary_entry(bind, n);
            if (NIL_P(data)) {
                mysql_bind[n].is_null     = &MYSQL_BOOL_TRUE;
                mysql_bind[n].buffer_type = MYSQL_TYPE_NULL;
            }
            else {
                data = typecast_to_string(data);
                rb_ary_push(typecast_bind, data);
                mysql_bind[n].is_null       = &MYSQL_BOOL_FALSE;
                mysql_bind[n].buffer_type   = MYSQL_TYPE_STRING;
                mysql_bind[n].buffer        = RSTRING_PTR(data);
                mysql_bind[n].buffer_length = RSTRING_LEN(data);
            }
        }

        if (mysql_stmt_bind_param(s->statement, mysql_bind) != 0) {
            rb_gc_unregister_address(&typecast_bind);
            rb_gc_unregister_address(&bind);
            free(mysql_bind);
            rb_raise(eSwiftRuntimeError, mysql_stmt_error(s->statement));
        }

        GVL_NOLOCK(nogvl_mysql_statement_execute, &command, RUBY_UBF_IO, 0);
        rb_gc_unregister_address(&typecast_bind);
        rb_gc_unregister_address(&bind);
        free(mysql_bind);
    }
    else {
        if ((n = mysql_stmt_param_count(s->statement)) > 0)
            rb_raise(eSwiftArgumentError, "expected %d bind arguments got 0 instead", n);
        GVL_NOLOCK(nogvl_mysql_statement_execute, &command, RUBY_UBF_IO, 0);
    }

    if (command.status != 0)
        rb_raise(eSwiftRuntimeError, mysql_stmt_error(s->statement));

    result = db_mysql_result_allocate(cDMR);
    return db_mysql_result_from_statement(result, self);
}

#release ⇒ Object 



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# File 'ext/swift/db/mysql/statement.c', line 139

VALUE db_mysql_statement_release(VALUE self) {
    Statement *s = db_mysql_statement_handle(self);
    if (s->statement) {
        mysql_stmt_free_result(s->statement);
        mysql_stmt_close(s->statement);
        s->statement = 0;
        return Qtrue;
    }
    return Qfalse;
}