mysql tutorial stored procedures

  • 2020-05-07 20:33:41
  • OfStack

Nevertheless looked for some on the net, discover to have 1 characteristic -- cannot come out namely total record number, simply oneself research. Finally, I've got it. It's not very efficient, but I think it's good. Post the code directly: it is also a record of learning mysql.

CREATE PROCEDURE p_pageList 
  ( 
  m_pageNo int , 
  m_perPageCnt int , 
  m_column varchar(1000) , 
  m_table varchar(1000) , 
  m_condition varchar(1000), 
  m_orderBy varchar(200) , 
  out m_totalPageCnt int 
  ) 
  BEGIN 
  SET @pageCnt = 1; --  The total number of records  
  SET @limitStart = (m_pageNo - 1)*m_perPageCnt; 
  SET @limitEnd = m_perPageCnt; 
  SET @sqlCnt = CONCAT('select count(1) into @pageCnt from ',m_table); --  This statement is critical to get the total value  
  SET @sql = CONCAT('select ',m_column,' from ',m_table); 
  IF m_condition IS NOT NULL AND m_condition <> '' THEN 
  SET @sql = CONCAT(@sql,' where ',m_condition); 
  SET @sqlCnt = CONCAT(@sqlCnt,' where ',m_condition); 
  END IF; 
  IF m_orderBy IS NOT NULL AND m_orderBy <> '' THEN 
  SET @sql = CONCAT(@sql,' order by ',m_orderBy); 
  END IF; 
  SET @sql = CONCAT(@sql, ' limit ', @limitStart, ',', @limitEnd); 
  PREPARE s_cnt from @sqlCnt; 
  EXECUTE s_cnt; 
  DEALLOCATE PREPARE s_cnt; 
  SET m_totalPageCnt = @pageCnt; 
  PREPARE record from @sql; 
  EXECUTE record; 
  DEALLOCATE PREPARE record; 
  END 

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