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Numeric error suppression in jsonpath

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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
This commit is contained in:
Alexander Korotkov
2019-03-16 12:21:19 +03:00
parent 72b6460336
commit 16d489b0fe
7 changed files with 353 additions and 97 deletions
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doc/src/sgml/func.sgml
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@@ -12209,7 +12209,7 @@ table2-mapping
<para>
The <literal>@?</literal> and <literal>@@</literal> operators suppress
errors including: lacking object field or array element, unexpected JSON
item type.
item type and numeric errors.
This behavior might be helpful while searching over JSON document
collections of varying structure.
</para>