$:begin declare v_sqlcounts varchar(4000); declare v_sqlselect varchar(4000); #拼接查詢總記錄的SQL語句 set v_sqlcounts = concat('select count(*) into @recordcount from ',p_tables,p_where); #select v_sqlcounts;leave $; set @sqlcounts = v_sqlcounts; prepare stmt from @sqlcounts; execute stmt; deallocate prepare stmt; #獲取動態SQL語句返回值 set p_recordcount = @recordcount; #根據總記錄跳數計算出總頁數 set p_pagecount = ceiling((p_recordcount+0.0)/p_pagesize); if p_pageindex <1 then set p_pageindex = 1; elseif p_pageindex > p_pagecount and p_pagecount <> 0 then set p_pageindex = p_pagecount; end if; #拼接分頁查詢記錄的動態SQL語句 set v_sqlselect = concat('select ',p_cloumns,' from ',p_tables,p_where,if(p_order is not null,p_order,''),' limit ',(p_pageindex-1)*p_pagesize,' , ',p_pagesize); #select v_sqlselect;leave $; set @sqlselect = v_sqlselect; prepare stmtselect from @sqlselect; execute stmtselect; deallocate prepare stmtselect; end $
復制代碼 代碼如下:
#拼接查詢總記錄的SQL語句 set v_sqlcounts = concat('select count(*) into @recordcount from ',v_tables,v_where); set @sqlcounts := v_sqlcounts; #預處理動態SQL prepare stmt from @sqlcounts; #傳遞動態SQL內參數 set @s1= categoryid; execute stmt using @s1; deallocate prepare stmt; #獲取動態SQL語句返回值 set recordcount = @recordcount;
#拼接查詢總記錄的SQL語句 set v_sqlcounts = concat('select count(*) into @recordcount from ',v_tables,v_where); set @sqlcounts := v_sqlcounts; #預處理動態SQL prepare stmt from @sqlcounts; #傳遞動態SQL內參數 set @s1= categoryid; execute stmt using @s1; deallocate prepare stmt; #獲取動態SQL語句返回值 set recordcount = @recordcount; 以上我上再做存儲過程分頁里用到動態SQL里將查詢到的count記錄條數通過變量@recordcount放到recordcount里面了。 mysql的IF ELSE和其他數據庫的判斷有點不一樣，簡單的判斷語句如下。
