grn_scanner *
grn_scanner_open(grn_ctx *ctx,
grn_obj *expr,
grn_operator op,
grn_bool record_exist)
{
grn_scanner *scanner;
scanner = GRN_MALLOC(sizeof(grn_scanner));
if (!scanner) {
return NULL;
}
scanner->source_expr = expr;
scanner->expr = grn_expr_rewrite(ctx, expr);
if (!scanner->expr) {
scanner->expr = expr;
}
scanner->sis = grn_scan_info_build(ctx,
scanner->expr,
&(scanner->n_sis),
op,
record_exist);
if (!scanner->sis) {
grn_scanner_close(ctx, scanner);
return NULL;
}
return scanner;
}
/*
* Rewrites expression.
*
* @example
* expression.parse("age >= 10 AND age < 20",
* :syntax => :script)
* expression.rewrite # => New rewritten expression.
* # It'll use between(age, 10, "include", 20, "exclude")
*
* @overload rewrite
* @return [Groonga::Expression, nil] new rewritten expression when
* the expression is rewritten, `nil` otherwise.
*
* @since 5.1.0
*/
static VALUE
rb_grn_expression_rewrite (VALUE self)
{
grn_ctx *context = NULL;
grn_obj *expression;
grn_obj *rewritten_expression;
rb_grn_expression_deconstruct(SELF(self), &expression, &context,
NULL, NULL,
NULL, NULL, NULL);
rewritten_expression = grn_expr_rewrite(context, expression);
return GRNOBJECT2RVAL(Qnil, context, rewritten_expression, GRN_TRUE);
}
