devanshu0987 commented on issue #12709:
URL: https://github.com/apache/datafusion/issues/12709#issuecomment-3834607055
> it seems postgres will convert it to the hex representation
Yes. I used Cursor to find the implementation. Seems it does a hex_encode.
`src/backend/utils/adt/bytea.c`
```
Datum
byteaout(PG_FUNCTION_ARGS)
{
bytea *vlena = PG_GETARG_BYTEA_PP(0);
char *result;
char *rp;
if (bytea_output == BYTEA_OUTPUT_HEX)
{
/* Print hex format */
rp = result = palloc(VARSIZE_ANY_EXHDR(vlena) * 2 + 2 + 1);
*rp++ = '\\';
*rp++ = 'x';
rp += hex_encode(VARDATA_ANY(vlena), VARSIZE_ANY_EXHDR(vlena),
rp);
}
```
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