Mysql соединяет две таблицы concat после обработки

Question

Моя цель - представить данные из DOC_sql и MDT_sql в таблице. Невозможно найти решение о том, как эта связь должна быть реализована.

Целью является поиск документов и представление документов на основе совпадающих тегов.

Входные данные

CALL SearthDocuments('\'Book\',\'Currency\'', 'en_ENG'); 

Код

DELIMITER // 
CREATE PROCEDURE SearthDocuments(IN VAR_TT_names VARCHAR(255), VAR_LANG_prefix CHAR(6)) 
BEGIN 

SET @TT_sql = CONCAT('SELECT TAG_ID FROM TagTranslate WHERE TT_text IN (', VAR_TT_names, ')'); 
SET @DOC_ID_sql = CONCAT('SELECT DOC_ID FROM DocumentTag WHERE TAG_ID IN (', @TT_sql, ') GROUP BY DOC_ID HAVING COUNT(DOC_ID)'); 

SET @DOC_sql = CONCAT('SELECT * FROM VIEW_Document WHERE DOC_ID IN (', @DOC_ID_sql, ') AND LANG_prefix = "', VAR_LANG_prefix, '"'); 
SET @MDT_sql = CONCAT('SELECT DOC_ID, count(*) as TAG_HITS FROM DocumentTag WHERE TAG_ID IN (', @TT_sql, ') GROUP BY DOC_ID HAVING COUNT(DOC_ID)'); 

-- SET @COM_sql = CONCAT('?') 
-- PREPARE COM_stmt FROM @COM_sql; 
-- EXECUTE COM_stmt; 
-- DEALLOCATE PREPARE COM_stmt; 
END 
// DELIMITER ; 

Обе таблицы имеют идентификатор doc_id

ТАБЛИЦА: DOC_sql

DOC_ID, DT_ID, DT_desc, DT_title, A_name, LANG_prefix 

ТАБЛИЦА: MDT_sql

DOC_ID, TAG_HITS 

Answer 1

Вот решение проблемы. Рабочий код.

DELIMITER // 
    CREATE PROCEDURE SearthDocuments(IN VAR_TT_names VARCHAR(255), VAR_LANG_prefix CHAR(3)) 
    BEGIN 

    SET @TT_sql = CONCAT('SELECT TAG_ID FROM TagTranslate WHERE TT_text IN (', VAR_TT_names, ')'); 
    SET @DOC_ID_sql = CONCAT('SELECT DOC_ID FROM DocumentTag WHERE TAG_ID IN (', @TT_sql, ') GROUP BY DOC_ID HAVING COUNT(DOC_ID)'); 

    SET @DOC_sql = CONCAT('SELECT * FROM VIEW_Document WHERE DOC_ID IN (', @DOC_ID_sql, ') AND LANG_prefix = ',VAR_LANG_prefix); 
    SET @MDT_sql = CONCAT('SELECT DOC_ID, count(*) as TAG_HITS FROM DocumentTag WHERE TAG_ID IN (', @TT_sql, ') GROUP BY DOC_ID HAVING COUNT(DOC_ID)'); 

    SET @COM_sql = CONCAT(' 
     SELECT * FROM 
     (SELECT * FROM VIEW_Document WHERE DOC_ID IN (', @DOC_ID_sql, ') AND LANG_prefix = "',VAR_LANG_prefix,'") AS V_DOC 
     LEFT JOIN 
     (SELECT DOC_ID, count(*) as TAG_HITS FROM DocumentTag WHERE TAG_ID IN (', @TT_sql ,') GROUP BY DOC_ID HAVING COUNT(DOC_ID)) as Searth 
     on V_DOC.DOC_ID = Searth.DOC_ID ORDER BY TAG_HITS DESC;' 
    ); 

    PREPARE COM_stmt FROM @COM_sql; 
    EXECUTE COM_stmt; 
    DEALLOCATE PREPARE COM_stmt; 

END 
// DELIMITER ;