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libpq: have PQconnectdbParams() and PQpingParams accept "" as default

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Previously, these functions treated "" optin values as defaults in some
ways, but not in others, like when comparing to .pgpass.  Also, add
documentation to clarify that now "" and NULL use defaults, like
PQsetdbLogin() has always done.

BACKWARD INCOMPATIBILITY

Patch by Adrian Vondendriesch, docs by me

Report by Jeff Janes
This commit is contained in:
Bruce Momjian
2014-04-19 08:41:51 -04:00
parent 66b1084e2c
commit 13ecb822e8
2 changed files with 7 additions and 7 deletions
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2
src/interfaces/libpq/fe-connect.c
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@ -4357,7 +4357,7 @@ conninfo_array_parse(const char *const * keywords, const char *const * values,
const char *pname = keywords[i];
const char *pvalue = values[i];
if (pvalue != NULL)
if (pvalue != NULL && pvalue[0] != '\0')
{
/* Search for the param record */
for (option = options; option->keyword != NULL; option++)