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