| 1143 | } |
| 1144 | |
| 1145 | void mysql_sql_parse(Item *item_where) { |
| 1146 | const Item::Type item_where_type = item_where->type(); |
| 1147 | switch (item_where_type) { |
| 1148 | case Item::FUNC_ITEM: { |
| 1149 | Item_func *item_func = (Item_func*) item_where; |
| 1150 | if (item_func->argument_count() > 0) { |
| 1151 | Item **item_end = (item_func->arguments()) |
| 1152 | + item_func->argument_count() - 1; |
| 1153 | if (item_func->argument_count() == 2 |
| 1154 | && (*(item_func->arguments()))->type() == Item::FIELD_ITEM |
| 1155 | && (*item_end)->type() == Item::FIELD_ITEM) { |
| 1156 | mysql_sql_parse_join(item_where); |
| 1157 | } else { |
| 1158 | String * field_print = new (thd->mem_root) String(); |
| 1159 | item_func->print(field_print, QT_ORDINARY); |
| 1160 | for (Item **child = item_func->arguments(); child <= item_end; |
| 1161 | child++) { |
| 1162 | if ((*child)->type() == Item::FIELD_ITEM) { |
| 1163 | if (options.verbose) |
| 1164 | sql_print_information("第%d步：开始解析where中的条件:%s \n", |
| 1165 | STEP_CNT++, field_print->c_ptr_safe()); |
| 1166 | if (item_func->functype() == Item_func::LIKE_FUNC |
| 1167 | && is_like_pre(field_print->c_ptr_safe())) { |
| 1168 | if (options.verbose) |
| 1169 | sql_print_information( |
| 1170 | "第%d步：条件%s 是like前缀匹配,跳过不分析. \n", |
| 1171 | STEP_CNT++, field_print->c_ptr_safe()); |
| 1172 | continue; |
| 1173 | } |
| 1174 | mysql_sql_parse_field(((Item_field *) (*child)), |
| 1175 | item_func->functype(), |
| 1176 | field_print->c_ptr_safe()); |
| 1177 | } |
| 1178 | } |
| 1179 | } |
| 1180 | } |
| 1181 | break; |
| 1182 | } |
| 1183 | case Item::COND_ITEM: { |
| 1184 | Item_cond *item_cond = (Item_cond*) item_where; |
| 1185 | switch (item_cond->functype()) { |
| 1186 | case Item_func::COND_AND_FUNC: { |
| 1187 | List_iterator<Item> li_item_cond(*item_cond->argument_list()); |
| 1188 | Item *item_abc; |
| 1189 | while ((item_abc = li_item_cond++)) { |
| 1190 | mysql_sql_parse(item_abc); |
| 1191 | } |
| 1192 | break; |
| 1193 | } |
| 1194 | case Item_func::COND_OR_FUNC: { |
| 1195 | break; |
| 1196 | } |
| 1197 | default: { |
| 1198 | break; |
| 1199 | } |
| 1200 | } |
| 1201 | break; |
| 1202 | } |
no test coverage detected