Gbase8s database sorts standard or raw result tables

When SELECT INTO Table Clause defines a persistent table to store the results of a query , Any nontrivial list in that clause

The expression must also declare an alias for the corresponding column in the newly created result table . Which column should be specified as the sort key of the result table ,ORDER

BY Clause must also refer to the same alias , Instead of specifying nontrivial tabular expressions .

for example , In the following nested queries ,tab56 Is the identifier of the result table , And tab56_col0 Yes subquery in Projection Clause

An alias for a nontrivial list expression defined in .ORDER BY Clause specifies the same subquery as the sort key , Not through

Its alias refers to that nontrivial column ：

SELECT ( SELECT tab54.tab54_col7 tab56_col0

FROM tab54

WHERE (tab54.tab54_col7 = -1423023 )

) tab56_col0,

“” tab56_col1

FROM tab57

WHERE tab57.tab57_col1 == -6296233

ORDER BY (

SELECT tab54.tab54_col7 tab56_col0

FROM tab54

WHERE (tab54.tab54_col7 = -1423023 )

) NULLS FIRST,2 NULLS FIRST

INTO tab56;

In the normal SELECT In the sentence , stay ORDER BY It is acceptable to specify nontrivial list expressions in the , But on one

from SELECT INTO Table Clause creates a result table for sorting ORDER BY Clause is not acceptable . On top

In the example , The database server returns SQL error -19828.

To avoid this error , The above example must be modified , Transform the nontrivial tabular expression from ORDER BY Clause remove , Take its alias

Replace that expression ：

SELECT ( SELECT tab54.tab54_col7 tab56_col0

FROM tab54

WHERE (tab54.tab54_col7 = -1423023 )

) tab56_col0,

“” tab56_col1

FROM tab57

WHERE tab57.tab57_col1 == -6296233

ORDER BY

tab56_col0 – Substituted alias for column expression in result table)

NULLS FIRST,2 NULLS FIRST

INTO tab56;