Client-side rows
A row variable is sometimes called a client-side row. When you declare a row variable, you must declare the row variable name, allocate memory, and perform operations on the row.
To access the elements of a row variable, you specify the
variable in the collection-derived table clause of a SELECT or UPDATE
statement. When either of these statements contains a collection-derived
table clause,
Informix® ESQL/C performs
the select or update operation on the row variable; it does
not send these statements to the database server for execution. For
example, Informix®
ESQL/C executes
the update operation on the row variable, a_row, that
the following UPDATE statement specifies:
EXEC SQL update table(:a_row) set fld1 = 6;To access fields of a row type, you must use the SELECT or UPDATE statements with the collection-derived table clause.
For more information about the collection-derived table clause, see Access a collection.