Add comments about the need to avoid uninitialized bits in datatype values.
There was already one recommendation in the documentation about writing
C functions to ensure padding bytes are zeroes, but make it stronger.
Also fix an example that was still using direct assignment to a varlena
length word, which no longer works since the varvarlena changes.
Branch
------
REL9_0_STABLE
Details
-------
http://git.postgresql.org/pg/commitdiff/db3cf2529304f96eabedd21f292bc661d5772aee
Modified Files
--------------
doc/src/sgml/xfunc.sgml | 26 ++++++++++++++++++++------
1 files changed, 20 insertions(+), 6 deletions(-)