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Gevik Babakhani wrote:
This patch implements the function parameter referencing by name as
discussed before.
Please find the version 1.0 of this patch at http://www.postgresql.nl/gevik/
The zip archive contains a combined and separate patches to make reviewing
easier.
How this patch is implemented:
As discussed before, a generic parser callback functionality has been
implemented
to create hooks from within the parser. The mechanism of handling refnames
acts only
when the parser is in context of parsing a function AND all of the previous
attempts to
recognize an unknown refname (also after implicit RTE) has failed. This way
the match
for a possible function parameter name is executed as a last measure.
notes:
- a new error code has been added: ERRCODE_UNDEFINED_FUNCTION_PARAMETER_NAME
- when a given refname is unrecognized after all matches, one of the two
following
error messages is shown:
a) there is no parameter %s defined for function %s
b) there is no parameter %s.%s defined for function %s or this \n is
an invalid reference to FROM-clause entry for table \%s\
- 2 new files have been added parse_callback.h and .c
- the patch also contains test for regression
- the main logic is implemented in transformColumnRef/ case 1 and case 2
- patch is created using VC++ 2005, tested on Win32 and RH4
Gevik Babakhani
PostgreSQL NL http://www.postgresql.nl
TrueSoftware BV http://www.truesoftware.nl
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