Parameter toast_tuple_target controls TOAST for new rows

Specifies the point at which we try to move long column values
into TOAST tables.

No effect on existing rows.

Discussion: 
https://postgr.es/m/CANP8+jKsVmw6CX6YP9z7zqkTzcKV1+Uzr3XjKcZW=2ya00o...@mail.gmail.com

Author: Simon Riggs <si...@2ndqudrant.com>
Reviewed-by: Andrew Dunstan <andrew.duns...@2ndquadrant.com>

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/c2513365a0a85e77d3c21adb92fe12cfbe0d1897

Modified Files
--------------
doc/src/sgml/ref/alter_table.sgml      |  2 +-
doc/src/sgml/ref/create_table.sgml     | 21 +++++++++++++++
src/backend/access/common/reloptions.c | 12 +++++++++
src/backend/access/heap/tuptoaster.c   |  2 +-
src/include/utils/rel.h                |  9 +++++++
src/test/regress/expected/strings.out  | 47 ++++++++++++++++++++++++++++++++++
src/test/regress/sql/strings.sql       | 19 ++++++++++++++
7 files changed, 110 insertions(+), 2 deletions(-)

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