How to Know the number of attrs?
typedef struct TupleDescData
{
int natts; /* number of attributes in the tuple */
Oid tdtypeid; /* composite type ID for tuple type */
int32 tdtypmod; /* typmod for tuple type */
int tdrefcount; /* reference count, or -1 if not counting */
TupleConstr *constr; /* constraints, or NULL if none */
/* attrs[N] is the description of Attribute Number N+1 */
FormData_pg_attribute attrs[FLEXIBLE_ARRAY_MEMBER];
} TupleDescData;
Hi, the attrs use FLEXIBLE_ARRAY_MEMBER, so which API should I use to get the real length of this array?
On 2023-09-24 20:56 +0800, jacktby jacktby wrote:
typedef struct TupleDescData
{
int natts; /* number of attributes in the tuple */
Oid tdtypeid; /* composite type ID for tuple type */
int32 tdtypmod; /* typmod for tuple type */
int tdrefcount; /* reference count, or -1 if not counting */
TupleConstr *constr; /* constraints, or NULL if none */
/* attrs[N] is the description of Attribute Number N+1 */
FormData_pg_attribute attrs[FLEXIBLE_ARRAY_MEMBER];
} TupleDescData;Hi, the attrs use FLEXIBLE_ARRAY_MEMBER, so which API should I use to
get the real length of this array?
Use the natts field of TupleDescData.
--
Erik