diff options
Diffstat (limited to 'src/backend/storage/lmgr/lmgr.c')
| -rw-r--r-- | src/backend/storage/lmgr/lmgr.c | 78 |
1 files changed, 77 insertions, 1 deletions
diff --git a/src/backend/storage/lmgr/lmgr.c b/src/backend/storage/lmgr/lmgr.c index bfcf388943c..6f6c609f53d 100644 --- a/src/backend/storage/lmgr/lmgr.c +++ b/src/backend/storage/lmgr/lmgr.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/storage/lmgr/lmgr.c,v 1.90 2007/01/05 22:19:38 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/storage/lmgr/lmgr.c,v 1.91 2007/06/19 20:13:21 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -635,3 +635,79 @@ LockTagIsTemp(const LOCKTAG *tag) } return false; /* default case */ } + + +/* + * Append a description of a lockable object to buf. + * + * Ideally we would print names for the numeric values, but that requires + * getting locks on system tables, which might cause problems since this is + * typically used to report deadlock situations. + */ +void +DescribeLockTag(StringInfo buf, const LOCKTAG *tag) +{ + switch (tag->locktag_type) + { + case LOCKTAG_RELATION: + appendStringInfo(buf, + _("relation %u of database %u"), + tag->locktag_field2, + tag->locktag_field1); + break; + case LOCKTAG_RELATION_EXTEND: + appendStringInfo(buf, + _("extension of relation %u of database %u"), + tag->locktag_field2, + tag->locktag_field1); + break; + case LOCKTAG_PAGE: + appendStringInfo(buf, + _("page %u of relation %u of database %u"), + tag->locktag_field3, + tag->locktag_field2, + tag->locktag_field1); + break; + case LOCKTAG_TUPLE: + appendStringInfo(buf, + _("tuple (%u,%u) of relation %u of database %u"), + tag->locktag_field3, + tag->locktag_field4, + tag->locktag_field2, + tag->locktag_field1); + break; + case LOCKTAG_TRANSACTION: + appendStringInfo(buf, + _("transaction %u"), + tag->locktag_field1); + break; + case LOCKTAG_OBJECT: + appendStringInfo(buf, + _("object %u of class %u of database %u"), + tag->locktag_field3, + tag->locktag_field2, + tag->locktag_field1); + break; + case LOCKTAG_USERLOCK: + /* reserved for old contrib code, now on pgfoundry */ + appendStringInfo(buf, + _("user lock [%u,%u,%u]"), + tag->locktag_field1, + tag->locktag_field2, + tag->locktag_field3); + break; + case LOCKTAG_ADVISORY: + appendStringInfo(buf, + _("advisory lock [%u,%u,%u,%u]"), + tag->locktag_field1, + tag->locktag_field2, + tag->locktag_field3, + tag->locktag_field4); + break; + default: + appendStringInfo(buf, + _("unrecognized locktag type %d"), + tag->locktag_type); + break; + } +} |