composite_to_json()

static void composite_to_json ( Datum  composite, StringInfo  result, bool  use_line_feeds  )

static

Definition at line 574 of file lwgeom_out_geojson.c.

{
        HeapTupleHeader td;
        Oid                     tupType;
        int32           tupTypmod;
        TupleDesc       tupdesc;
        HeapTupleData tmptup,
                           *tuple;
        int                     i;
        bool            needsep = false;
        const char *sep;
 
        sep = use_line_feeds ? ",\n " : ",";
 
        td = DatumGetHeapTupleHeader(composite);
 
        /* Extract rowtype info and find a tupdesc */
        tupType = HeapTupleHeaderGetTypeId(td);
        tupTypmod = HeapTupleHeaderGetTypMod(td);
        tupdesc = lookup_rowtype_tupdesc(tupType, tupTypmod);
 
        /* Build a temporary HeapTuple control structure */
        tmptup.t_len = HeapTupleHeaderGetDatumLength(td);
        tmptup.t_data = td;
        tuple = &tmptup;
 
        appendStringInfoChar(result, '{');
 
        for (i = 0; i < tupdesc->natts; i++)
        {
                Datum           val;
                bool            isnull;
                char       *attname;
                JsonTypeCategory tcategory;
                Oid                     outfuncoid;
                Form_pg_attribute att = TupleDescAttr(tupdesc, i);
 
                if (att->attisdropped)
                        continue;
 
                if (needsep)
                        appendStringInfoString(result, sep);
                needsep = true;
 
                attname = NameStr(att->attname);
                escape_json(result, attname);
                appendStringInfoChar(result, ':');
 
                val = heap_getattr(tuple, i + 1, tupdesc, &isnull);
 
                if (isnull)
                {
                        tcategory = JSONTYPE_NULL;
                        outfuncoid = InvalidOid;
                }
                else
                        json_categorize_type(att->atttypid, &tcategory, &outfuncoid);
 
                datum_to_json(val, isnull, result, tcategory, outfuncoid, false);
        }
 
        appendStringInfoChar(result, '}');
        ReleaseTupleDesc(tupdesc);
}

References datum_to_json(), json_categorize_type(), JSONTYPE_NULL, and result.

Referenced by datum_to_json().

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