diff options
Diffstat (limited to 'src/include/utils/typcache.h')
| -rw-r--r-- | src/include/utils/typcache.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/include/utils/typcache.h b/src/include/utils/typcache.h index f25448d316f..217d064da52 100644 --- a/src/include/utils/typcache.h +++ b/src/include/utils/typcache.h @@ -76,11 +76,14 @@ typedef struct TypeCacheEntry /* * Tuple descriptor if it's a composite type (row type). NULL if not * composite or information hasn't yet been requested. (NOTE: this is a - * reference-counted tupledesc.) To simplify caching dependent info, - * tupDescSeqNo is incremented each time tupDesc is rebuilt in a session. + * reference-counted tupledesc.) + * + * To simplify caching dependent info, tupDesc_identifier is an identifier + * for this tupledesc that is unique for the life of the process, and + * changes anytime the tupledesc does. Zero if not yet determined. */ TupleDesc tupDesc; - int64 tupDescSeqNo; + uint64 tupDesc_identifier; /* * Fields computed when TYPECACHE_RANGE_INFO is requested. Zeroes if not @@ -138,6 +141,9 @@ typedef struct TypeCacheEntry #define TYPECACHE_HASH_EXTENDED_PROC 0x4000 #define TYPECACHE_HASH_EXTENDED_PROC_FINFO 0x8000 +/* This value will not equal any valid tupledesc identifier, nor 0 */ +#define INVALID_TUPLEDESC_IDENTIFIER ((uint64) 1) + /* * Callers wishing to maintain a long-lived reference to a domain's constraint * set must store it in one of these. Use InitDomainConstraintRef() and @@ -179,6 +185,8 @@ extern TupleDesc lookup_rowtype_tupdesc_domain(Oid type_id, int32 typmod, extern void assign_record_type_typmod(TupleDesc tupDesc); +extern uint64 assign_record_type_identifier(Oid type_id, int32 typmod); + extern int compare_values_of_enum(TypeCacheEntry *tcache, Oid arg1, Oid arg2); extern size_t SharedRecordTypmodRegistryEstimate(void); |