pgsql: Change the row constructor syntax (ROW(...)) so that list

Does this complete this TODO item?

o Allow UPDATE tab SET ROW (col, ...) = (...) for updating multiple
columns

---------------------------------------------------------------------------

Tom Lane wrote:

Log Message:
-----------
Change the row constructor syntax (ROW(...)) so that list elements foo.*
will be expanded to a list of their member fields, rather than creating
a nested rowtype field as formerly. (The old behavior is still available
by omitting '.*'.) This syntax is not allowed by the SQL spec AFAICS,
so changing its behavior doesn't violate the spec. The new behavior is
substantially more useful since it allows, for example, triggers to check
for data changes with 'if row(new.*) is distinct from row(old.*)'. Per
my recent proposal.

Modified Files:
--------------
pgsql/doc/src/sgml:
syntax.sgml (r1.106 -> r1.107)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/syntax.sgml.diff?r1=1.106&r2=1.107)
pgsql/src/backend/parser:
parse_expr.c (r1.192 -> r1.193)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_expr.c.diff?r1=1.192&r2=1.193)
parse_target.c (r1.143 -> r1.144)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_target.c.diff?r1=1.143&r2=1.144)
pgsql/src/include/parser:
parse_target.h (r1.39 -> r1.40)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/parser/parse_target.h.diff?r1=1.39&r2=1.40)
pgsql/src/test/regress/expected:
triggers.out (r1.22 -> r1.23)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/triggers.out.diff?r1=1.22&r2=1.23)
pgsql/src/test/regress/sql:
triggers.sql (r1.12 -> r1.13)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/triggers.sql.diff?r1=1.12&r2=1.13)

---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match

--
Bruce Momjian bruce@momjian.us
EnterpriseDB http://www.enterprisedb.com

+ If your life is a hard drive, Christ can be your backup. +

Bruce Momjian <bruce@momjian.us> writes:

Does this complete this TODO item?
o Allow UPDATE tab SET ROW (col, ...) = (...) for updating multiple
columns

No, that's unrelated.

regards, tom lane