boolean_t gvcst_queryget(mval *val)
{
bool found, is_hidden, is_dummy = FALSE, sn_tpwrapped;
boolean_t est_first_pass;
char save_currkey[SIZEOF(gv_key) + DBKEYSIZE(MAX_KEY_SZ)];
gv_key *save_gv_currkey;
int save_dollar_tlevel;
DEBUG_ONLY(save_dollar_tlevel = dollar_tlevel);
found = gvcst_queryget2(val, NULL);
# ifdef UNIX
assert(save_dollar_tlevel == dollar_tlevel);
CHECK_HIDDEN_SUBSCRIPT(gv_altkey, is_hidden);
if (found && IS_SN_DUMMY(val->str.len, val->str.addr))
is_dummy = TRUE;
if (!found || (!is_dummy && !is_hidden))
return found;
IF_SN_DISALLOWED_AND_NO_SPAN_IN_DB(return found);
SAVE_GV_CURRKEY;
if (!dollar_tlevel)
{
sn_tpwrapped = TRUE;
op_tstart((IMPLICIT_TSTART), TRUE, &literal_batch, 0);
ESTABLISH_NORET(gvcst_queryget_ch, est_first_pass);
GVCST_ROOT_SEARCH_AND_PREP(est_first_pass);
} else
sn_tpwrapped = FALSE;
found = gvcst_query();
COPY_KEY(gv_currkey, gv_altkey); /* set gv_currkey to gv_altkey */
found = gvcst_get(val);
INCR_GVSTATS_COUNTER(cs_addrs, cs_addrs->nl, n_get, (gtm_uint64_t) -1); /* only counted externally as one get */
INCR_GVSTATS_COUNTER(cs_addrs, cs_addrs->nl, n_query, (gtm_uint64_t) -1);
if (sn_tpwrapped)
{
op_tcommit();
REVERT; /* remove our condition handler */
}
RESTORE_GV_CURRKEY;
assert(save_dollar_tlevel == dollar_tlevel);
# endif
return found;
}
boolean_t gvcst_gblmod(mval *v)
{
boolean_t gblmod, is_dummy;
enum cdb_sc status;
int key_size, key_size2, data_len;
srch_hist *alt_history;
blk_hdr_ptr_t bp;
rec_hdr_ptr_t rp;
unsigned short match, match2, rsiz, offset_to_value, oldend;
srch_blk_status *bh;
sm_uc_ptr_t b_top;
trans_num tn_to_compare;
T_BEGIN_READ_NONTP_OR_TP(ERR_GBLMODFAIL);
assert(t_tries < CDB_STAGNATE || cs_addrs->now_crit); /* we better hold crit in the final retry (TP & non-TP) */
for (;;)
{
gblmod = TRUE;
if (cdb_sc_normal == (status = gvcst_search(gv_currkey, NULL)))
{
alt_history = gv_target->alt_hist;
alt_history->h[0].blk_num = 0;
VMS_ONLY(
if (cs_addrs->hdr->resync_tn >= ((blk_hdr_ptr_t)gv_target->hist.h[0].buffaddr)->tn)
gblmod = FALSE;
)
# ifdef UNIX
tn_to_compare = ((blk_hdr_ptr_t)gv_target->hist.h[0].buffaddr)->tn;
bh = gv_target->hist.h;
bp = (blk_hdr_ptr_t) bh->buffaddr;
rp = (rec_hdr_ptr_t) (bh->buffaddr + bh->curr_rec.offset);
b_top = bh->buffaddr + bp->bsiz;
GET_USHORT(rsiz, &rp->rsiz);
key_size = gv_currkey->end + 1;
data_len = rsiz + EVAL_CMPC(rp) - SIZEOF(rec_hdr) - key_size;
match = bh->curr_rec.match;
if (key_size == match)
{
if ((0 > data_len) || ((sm_uc_ptr_t)rp + rsiz > b_top))
{
status = cdb_sc_rmisalign1;
t_retry(status);
continue;
}
offset_to_value = SIZEOF(rec_hdr) + key_size - EVAL_CMPC(rp);
/* If it could be a spanning node, i.e., has special value, then try to get tn from the
* block that contains the first special subscript. Since dummy nodes always have the
* same value, the tn number is not updated It s enough to do only the first piece
* since all pieces of a spanning node are killed before an update is applied.
*/
if (IS_SN_DUMMY(data_len, (sm_uc_ptr_t)rp + offset_to_value))
{
oldend = gv_currkey->end;
APPEND_HIDDEN_SUB(gv_currkey);
if (cdb_sc_normal == (status = gvcst_search(gv_currkey, alt_history)))
{
key_size2 = gv_currkey->end + 1;
match = alt_history->h[0].curr_rec.match;
if (key_size2 == match)
tn_to_compare = ((blk_hdr_ptr_t)alt_history->h[0].buffaddr)->tn;
}
else
{
gv_currkey->end = oldend;
gv_currkey->base[gv_currkey->end - 1] = KEY_DELIMITER;
gv_currkey->base[gv_currkey->end] = KEY_DELIMITER;
t_retry(status);
continue;
}
gv_currkey->end = oldend;
gv_currkey->base[gv_currkey->end - 1] = KEY_DELIMITER;
gv_currkey->base[gv_currkey->end] = KEY_DELIMITER;
}
}
if (cs_addrs->hdr->zqgblmod_tn > tn_to_compare)
gblmod = FALSE;
# endif
if (!dollar_tlevel)
{
if ((trans_num)0 == t_end(&gv_target->hist, 0 == alt_history->h[0].blk_num ? NULL : alt_history,
TN_NOT_SPECIFIED))
continue;
} else
{
status = tp_hist(0 == alt_history->h[0].blk_num ? NULL : alt_history);
if (cdb_sc_normal != status)
{
t_retry(status);
continue;
}
}
return gblmod;
}