In this blog post, let’s learn about the error message “251 ORDER BY or GROUP BY column number is too big.” in Hydra and the description of the error.
Error Message
251 ORDER BY or GROUP BY column number is too big.
Error Details
When you select INTO TEMP, you are creating a table. As with any table, the columns of a temporary table must all have names. When you select a single column, the column in the temporary table receives the same name. When you select an expression, you must supply a name using a column alias, as in the following example:
SELECT order_num, ship_date, ship_date + 14 expected FROM orders INTO TEMP ord_dates
The temporary table ord_dates has three columns, which are named order_num, ship_date, and expected. The same principle applies to a view: each column must have a name. When you select every column of a view from a table, the view can have the same column names by default. When you derive any column of a view from an expression, you must give all the columns explicit names, as in the following example:
CREATE VIEW ord_dates(order_num, ship_date, expected) AS SELECT order_num, ship_date, ship_date + 14 FROM orders