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Commit352f6f2

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Add collation versions for Windows.
On Vista and later, use GetNLSVersionEx() to request collation versioninformation.Reviewed-by: Juan José Santamaría Flecha <juanjo.santamaria@gmail.com>Discussion:https://postgr.es/m/CA%2BhUKGJvqup3s%2BJowVTcacZADO6dOhfdBmvOPHLS3KXUJu41Jw%40mail.gmail.com
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‎src/backend/utils/adt/pg_locale.c

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@@ -1555,6 +1555,33 @@ get_collation_actual_version(char collprovider, const char *collcollate)
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/* Use the glibc version because we don't have anything better. */
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collversion=pstrdup(gnu_get_libc_version());
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#elif defined(WIN32)&&_WIN32_WINNT >=0x0600
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/*
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* If we are targeting Windows Vista and above, we can ask for a name
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* given a collation name (earlier versions required a location code
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* that we don't have).
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*/
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NLSVERSIONINFOEXversion= {sizeof(NLSVERSIONINFOEX)};
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WCHARwide_collcollate[LOCALE_NAME_MAX_LENGTH];
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/* These would be invalid arguments, but have no version. */
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if (pg_strcasecmp("c",collcollate)==0||
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pg_strcasecmp("posix",collcollate)==0)
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returnNULL;
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/* For all other names, ask the OS. */
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MultiByteToWideChar(CP_ACP,0,collcollate,-1,wide_collcollate,
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LOCALE_NAME_MAX_LENGTH);
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if (!GetNLSVersionEx(COMPARE_STRING,wide_collcollate,&version))
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ereport(ERROR,
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(errmsg("could not get collation version for locale \"%s\": error code %lu",
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collcollate,
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GetLastError())));
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collversion=psprintf("%d.%d,%d.%d",
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(version.dwNLSVersion >>8)&0xFFFF,
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version.dwNLSVersion&0xFF,
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(version.dwDefinedVersion >>8)&0xFFFF,
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version.dwDefinedVersion&0xFF);
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#endif
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}
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