pgsql: Numeric error suppression in jsonpath

Numeric error suppression in jsonpath

Add support of numeric error suppression to jsonpath as it's required by
standard. This commit doesn't use PG_TRY()/PG_CATCH() in order to implement
that. Instead, it provides internal versions of numeric functions used, which
support error suppression.

Discussion: https://postgr.es/m/fcc6fc6a-b497-f39a-923d-aa34d0c588e8%402ndQuadrant.com
Author: Alexander Korotkov, Nikita Glukhov
Reviewed-by: Tomas Vondra

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/16d489b0fe058e527619f5e9d92fd7ca3c6c2994

Modified Files
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doc/src/sgml/func.sgml | 2 +-
src/backend/utils/adt/float.c | 68 ++++++--
src/backend/utils/adt/jsonpath_exec.c | 78 ++++++---
src/backend/utils/adt/numeric.c | 252 ++++++++++++++++++++++-----
src/include/utils/float.h | 3 +
src/include/utils/numeric.h | 12 ++
src/test/regress/expected/jsonb_jsonpath.out | 35 +++-
7 files changed, 353 insertions(+), 97 deletions(-)