What is wrong with this a MySQL 5.6 procedure definition? Use a variable for table name [closed]
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02-11-2019 - |
Question
Just can't understand why it's throwing this error?
Error Code: 1064. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'NULL' at line 1
drop procedure if exists dividir_tabla_por_usuario;
delimiter //
create procedure dividir_tabla_por_usuario(tabla varchar(100), columna_usuario varchar(100), columna_fecha varchar(100))
begin
set @i = 0;
set @q1 = concat('select count(*) from (select distinct ', columna_usuario ,' from ', tabla , ' order by ', columna_usuario ,' asc) as t1 into @c');
prepare p1 from @q;
execute p1;
while @i <= @c do
set @r = 0;
set @q2 = concat('select * from ', tabla , ' where ', columna_usuario ,' = (select ', columna_usuario ,' from (select @r:=@r +1 as ord, ', columna_usuario ,' from (select distinct ', columna_usuario ,' from ', tabla , 'order by ', columna_usuario ,' asc) as t2) as t3 where ord = ', @i ,' ) order by ', columna_fecha ,' asc limit 30000');
prepare p2 from @q2;
execute p2;
set @i := @i + 1;
end while;
end//
delimiter ;
call dividir_tabla_por_usuario('mytable', 'mycolumn_1', 'mycolumn_2');
No correct solution
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