use TokenBigramSplitSymbolAlpha parser and MroongaBooleanFullText search key.

Note that similarity search in MroongaFullText search key does not give good results with TokenBigramSplitSymbolAlpha parser.

bt5/erp5_full_text_mroonga_catalog/CatalogMethodTemplateItem/portal_catalog/erp5_mysql_innodb/z_create_catalog_fulltext.xml

@@ -67,8 +67,8 @@ CREATE TABLE `catalog_full_text` (\n
   `title` varchar(255) default \'\',\n
   `description` text,\n
   PRIMARY KEY  (`uid`),\n
-  FULLTEXT `title` (`title`),\n
-  FULLTEXT `description` (`description`)\n
+  FULLTEXT `title` (`title`) COMMENT \'parser "TokenBigramSplitSymbolAlpha"\',\n
+  FULLTEXT `description` (`description`) COMMENT \'parser "TokenBigramSplitSymbolAlpha"\'\n
 ) ENGINE=mroonga;\n
 </string> </value>
         </item>

bt5/erp5_full_text_mroonga_catalog/CatalogMethodTemplateItem/portal_catalog/erp5_mysql_innodb/z_create_content_translation.xml

@@ -64,7 +64,7 @@
   `content_language` VARBINARY(100),\n
   `translated_text` TEXT,\n
   PRIMARY KEY (`uid`, `property_name`, `content_language`),\n
-  FULLTEXT KEY (`translated_text`)\n
+  FULLTEXT KEY (`translated_text`) COMMENT \'parser "TokenBigramSplitSymbolAlpha"\'\n
 ) ENGINE=mroonga;\n
 </string> </value>
         </item>

bt5/erp5_full_text_mroonga_catalog/CatalogMethodTemplateItem/portal_catalog/erp5_mysql_innodb/z_create_fulltext.xml

@@ -66,7 +66,7 @@ CREATE TABLE `full_text` (\n
   `uid` BIGINT UNSIGNED NOT NULL,\n
   `SearchableText` MEDIUMTEXT,\n
   PRIMARY KEY  (`uid`),\n
-  FULLTEXT `SearchableText` (`SearchableText`)\n
+  FULLTEXT `SearchableText` (`SearchableText`) COMMENT \'parser "TokenBigramSplitSymbolAlpha"\'\n
 ) ENGINE=mroonga;\n
 </string> </value>
         </item>

bt5/erp5_full_text_mroonga_catalog/CatalogSearchKeyTemplateItem/search_key_list.xml

 <key_list>
- <key>SearchableText | MroongaFullTextKey</key>
- <key>catalog_full_text.description | MroongaFullTextKey</key>
+ <key>SearchableText | MroongaBooleanFullTextKey</key>
+ <key>catalog_full_text.description | MroongaBooleanFullTextKey</key>
  <key>catalog_full_text.title | MroongaBooleanFullTextKey</key>
- <key>description | MroongaFullTextKey</key>
- <key>full_text.SearchableText | MroongaFullTextKey</key>
+ <key>description | MroongaBooleanFullTextKey</key>
+ <key>full_text.SearchableText | MroongaBooleanFullTextKey</key>
  <key>title | MroongaBooleanFullTextKey</key>
 </key_list>
\ No newline at end of file

bt5/erp5_full_text_mroonga_catalog/bt/template_catalog_search_key_list

-SearchableText | MroongaFullTextKey
-catalog_full_text.description | MroongaFullTextKey
+SearchableText | MroongaBooleanFullTextKey
+catalog_full_text.description | MroongaBooleanFullTextKey
 catalog_full_text.title | MroongaBooleanFullTextKey
-description | MroongaFullTextKey
-full_text.SearchableText | MroongaFullTextKey
+description | MroongaBooleanFullTextKey
+full_text.SearchableText | MroongaBooleanFullTextKey
 title | MroongaBooleanFullTextKey
\ No newline at end of file