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85 lines
3.1 KiB
C++
85 lines
3.1 KiB
C++
/* -*- c-basic-offset: 2 -*- */
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/*
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Copyright(C) 2013 Kouhei Sutou <kou@clear-code.com>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
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*/
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#ifndef MRN_CONDITION_CONVERTER_HPP_
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#define MRN_CONDITION_CONVERTER_HPP_
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#include <mrn_mysql_compat.h>
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#include <item_cmpfunc.h>
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#include <groonga.h>
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namespace mrn {
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class ConditionConverter {
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public:
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ConditionConverter(grn_ctx *ctx, grn_obj *table, bool is_storage_mode);
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~ConditionConverter();
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bool is_convertable(const Item *item);
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unsigned int count_match_against(const Item *item);
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// caller must check "where" can be convertable by
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// is_convertable(). This method doesn't validate "where".
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void convert(const Item *where, grn_obj *expression);
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private:
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enum NormalizedType {
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STRING_TYPE,
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INT_TYPE,
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TIME_TYPE,
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UNSUPPORTED_TYPE,
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};
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grn_ctx *ctx_;
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grn_obj *table_;
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bool is_storage_mode_;
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grn_obj column_name_;
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grn_obj value_;
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bool is_convertable(const Item_cond *cond_item);
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bool is_convertable(const Item_func *func_item);
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bool is_convertable_binary_operation(const Item_field *field_item,
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Item *value_item,
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Item_func::Functype func_type);
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bool is_convertable_between(const Item_field *field_item,
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Item *min_item,
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Item *max_item);
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bool is_valid_time_value(const Item_field *field_item,
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Item *value_item);
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bool get_time_value(const Item_field *field_item,
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Item *value_item,
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MYSQL_TIME *mysql_time);
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bool have_index(const Item_field *field_item, grn_operator _operator);
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bool have_index(const Item_field *field_item, Item_func::Functype func_type);
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NormalizedType normalize_field_type(enum_field_types field_type);
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void convert_binary_operation(const Item_func *func_item,
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grn_obj *expression,
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grn_operator _operator);
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void convert_between(const Item_func *func_item, grn_obj *expression);
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void append_field_value(const Item_field *field_item,
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grn_obj *expression);
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void append_const_item(const Item_field *field_item,
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Item *const_item,
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grn_obj *expression);
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};
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}
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#endif /* MRN_CONDITION_CONVERTER_HPP_ */
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