Thread: pgsql: Catch syntax error in generated column definition

Catch syntax error in generated column definition

The syntax

    GENERATED BY DEFAULT AS (expr)

is not allowed but we have to accept it in the grammar to avoid
shift/reduce conflicts because of the similar syntax for identity
columns.  The existing code just ignored this, incorrectly.  Add an
explicit error check and a bespoke error message.

Reported-by: Justin Pryzby <pryzby@telsasoft.com>

Branch
------
master

Details
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https://git.postgresql.org/pg/commitdiff/7241911782a7420e38b6e50b57d304ea48bc5362

Modified Files
--------------
src/backend/parser/gram.y               | 13 +++++++++++++
src/test/regress/expected/generated.out |  5 +++++
src/test/regress/sql/generated.sql      |  3 +++
3 files changed, 21 insertions(+)