On Sat, May 26, 2018 at 6:37 PM, Adrian Klaver <adrian.klaver@xxxxxxxxxxx> wrote:
https://www.postgresql.org/docs/10/static/sql-update.html
"column_name
The name of a column in the table named by table_name. The column name can be qualified with a subfield name or array subscript, if needed. Do not include the table's name in the specification of a target column — for example, UPDATE table_name SET table_name.col = 1 is invalid.
"
So it should be:
SET letters = el.letters
Thank you Adrian, this has worked