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| #include "postgres.h" | |
| #include "catalog/pg_type.h" | |
| #include "utils/lsyscache.h" | |
| #include "fmgr.h" | |
| #include "utils/rangetypes.h" | |
| #include "utils/multirangetypes.h" | |
| PG_MODULE_MAGIC; | |
| Datum myfun(PG_FUNCTION_ARGS); | |
| PG_FUNCTION_INFO_V1(myfun); | |
| Datum myfun(PG_FUNCTION_ARGS) | |
| { | |
| int range_count=2; | |
| RangeType* ranges[range_count]; | |
| TypeCacheEntry *rangetyp; | |
| int typooid = INT8RANGEOID; | |
| RangeBound lower; | |
| RangeBound upper; | |
| MultirangeType *mr; | |
| //Oid mltrngtypid = get_fn_expr_rettype(fcinfo->flinfo); | |
| //elog(WARNING, "%d",mltrngtypid); | |
| //cache=get_range_io_data(fcinfo,INT8RANGEOID, IOFunc_input); | |
| rangetyp = range_get_typcache(fcinfo, INT8RANGEOID); | |
| lower.lower=true; | |
| upper.lower=false; | |
| lower.infinite=false; | |
| upper.infinite=false; | |
| lower.inclusive=true; | |
| upper.inclusive=true; | |
| for (int i=0;i<range_count;i++) | |
| { | |
| lower.val = Int64GetDatum(10*i); | |
| upper.val = Int64GetDatum(10*i+5); | |
| ranges[i] = make_range(rangetyp, &lower, &upper, false); | |
| } | |
| //MultirangeIOData *cache = get_multirange_io_data(fcinfo, typoid, IOFunc_input); | |
| //rangetyp = cache->typcache->rngtype; | |
| rangetyp = multirange_get_typcache(fcinfo, INT8MULTIRANGEOID); | |
| mr = make_multirange(INT8MULTIRANGEOID, rangetyp->rngtype, range_count, ranges); | |
| PG_RETURN_MULTIRANGE_P(mr); | |
| // https://github.com/postgres/postgres/blob/07d683b54af854098cc559d4b8640905f9efa0ea/src/backend/utils/adt/multirangetypes.c#L641 | |
| } |
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