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mysqlsqlstored-procedurestemp-tables

MySql: how to create temp table by using dynamic select statement?


As you can understand from the title I want to create a temp table by using a dynamic select statement. Here is my codes:

 declare  strwhere varchar(30);
if hour(now()) >= 16 and minute(now()) >=30 then
    set strwhere = ' day(now()) +1 ';
else 
    set strwhere = '  day(now()) ';
end if;
set @query = concat("select  pc.customerid,
                    deliverytimespanid,
                    pc.id,
                    ca.districtid,
                    pc.status,
                    pc.orderid,
                    deliverydatetime
                from packages as pc
                inner join  customeraddresses as ca on ca.id = pc.addressid
                where pc.status = 1
                and day(pc.deliverydatetime) =",strwhere,"
                and month(pc.deliverydatetime) = month(now()) 
                and year(pc.deliverydatetime) = year(now()) ");

prepare resultset from @query;
execute resultset;
deallocate prepare resultset;
create temporary table if not exists table2 as (select * from resultset);

It returns

resultset doesn't exist.

How should I select the result?


Solution

  • Create the table with the SELECT statement. Also you can shorten your WHERE clause.

    declare  strwhere varchar(30);
    if hour(now()) >= 16 and minute(now()) >=30 then
        set strwhere = ' CURDATE() + INTERVAL 1 DAY ';
    else 
        set strwhere = '  CURDATE() ';
    end if;
    set @query = concat("CREATE TEMPORARY TABLE table2 AS
                        SELECT  pc.customerid,
                        deliverytimespanid,
                        pc.id,
                        ca.districtid,
                        pc.status,
                        pc.orderid,
                        deliverydatetime
                    from packages as pc
                    inner join  customeraddresses as ca on ca.id = pc.addressid
                    where pc.status = 1
                    and pc.deliverydatetime =",strwhere,"
                    );
    
    prepare resultset from @query;
    execute resultset;
    deallocate prepare resultset;