diff options
| author | Thomas Munro <tmunro@postgresql.org> | 2019-10-16 16:51:40 +1300 |
|---|---|---|
| committer | Thomas Munro <tmunro@postgresql.org> | 2019-10-16 17:28:24 +1300 |
| commit | d5ac14f9ccdda036358c9059d4a29836ebc0c440 (patch) | |
| tree | 3d7e1242ce542914a89467af88099bdccf116fbe /src/backend/utils/adt/pg_locale.c | |
| parent | 4351142e5843dc9fcb080a51aa082d63be59a5ab (diff) | |
| download | postgresql-d5ac14f9ccdda036358c9059d4a29836ebc0c440.tar.gz postgresql-d5ac14f9ccdda036358c9059d4a29836ebc0c440.zip | |
Use libc version as a collation version on glibc systems.
Using glibc's version string to detect potential collation definition
changes is not 100% reliable, but it's better than nothing. Currently
this affects only collations explicitly provided by "libc". More work
will be needed to handle the default collation.
Author: Thomas Munro, based on a suggestion from Christoph Berg
Reviewed-by: Peter Eisentraut
Discussion: https://postgr.es/m/4b76c6d4-ae5e-0dc6-7d0d-b5c796a07e34%402ndquadrant.com
Diffstat (limited to 'src/backend/utils/adt/pg_locale.c')
| -rw-r--r-- | src/backend/utils/adt/pg_locale.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/src/backend/utils/adt/pg_locale.c b/src/backend/utils/adt/pg_locale.c index 2a076a3dfd1..fcdbaae37b9 100644 --- a/src/backend/utils/adt/pg_locale.c +++ b/src/backend/utils/adt/pg_locale.c @@ -70,6 +70,10 @@ #include <unicode/ucnv.h> #endif +#ifdef __GLIBC__ +#include <gnu/libc-version.h> +#endif + #ifdef WIN32 /* * This Windows file defines StrNCpy. We don't need it here, so we undefine @@ -1499,7 +1503,7 @@ pg_newlocale_from_collation(Oid collid) char * get_collation_actual_version(char collprovider, const char *collcollate) { - char *collversion; + char *collversion = NULL; #ifdef USE_ICU if (collprovider == COLLPROVIDER_ICU) @@ -1523,7 +1527,13 @@ get_collation_actual_version(char collprovider, const char *collcollate) } else #endif - collversion = NULL; + if (collprovider == COLLPROVIDER_LIBC) + { +#if defined(__GLIBC__) + /* Use the glibc version because we don't have anything better. */ + collversion = pstrdup(gnu_get_libc_version()); +#endif + } return collversion; } |