pgsql: Table function support for PL/Python

Table function support for PL/Python

This allows functions with multiple OUT parameters returning both one
or multiple records (RECORD or SETOF RECORD).

Jan Urbański, reviewed by Hitoshi Harada

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/bc411f25c14f65b459de5dbc96ac79e7741ef9ee

Modified Files
--------------
doc/src/sgml/plpython.sgml                      |   36 ++-
src/pl/plpython/Makefile                        |    1 +
src/pl/plpython/expected/plpython_composite.out |  361 +++++++++++++++++++++++
src/pl/plpython/expected/plpython_record.out    |   14 +-
src/pl/plpython/expected/plpython_trigger.out   |   18 ++
src/pl/plpython/plpython.c                      |  177 ++++++++++--
src/pl/plpython/sql/plpython_composite.sql      |  168 +++++++++++
src/pl/plpython/sql/plpython_record.sql         |    4 +-
src/pl/plpython/sql/plpython_trigger.sql        |   20 ++
9 files changed, 748 insertions(+), 51 deletions(-)