/* Upgrade ^#t global in "reg" region */ void trigger_upgrade(gd_region *reg) { boolean_t est_first_pass, do_upgrade, is_defined; boolean_t was_null = FALSE, is_null = FALSE; int seq_num, trig_seq_num; int currlabel; mval tmpmval, xecuteimval, *gvname, *tmpmv, *tmpmv2; int4 result, tmpint4; uint4 curend, gvname_prev, xecute_curend; uint4 hash_code, kill_hash_code; int count, i, xecutei, tncount; char *trigname, *trigindex, *ptr; char name_and_index[MAX_MIDENT_LEN + 1 + MAX_DIGITS_IN_INT]; char trigvn[MAX_MIDENT_LEN + 1 + MAX_DIGITS_IN_INT], nullbyte[1]; uint4 trigname_len, name_index_len; int ilen; sgmnt_addrs *csa; jnl_private_control *jpc; uint4 sts; int close_res; hash128_state_t hash_state, kill_hash_state; uint4 hash_totlen, kill_hash_totlen; int trig_protected_mval_push_count; # ifdef DEBUG int save_dollar_tlevel; # endif DCL_THREADGBL_ACCESS; SETUP_THREADGBL_ACCESS; assert(gv_cur_region == reg); assert(!dollar_tlevel); /* caller should have ensured this. this is needed as otherwise things get complicated. */ assert(!is_replicator); /* caller should have ensured this. this is needed so we dont bump jnl_seqno (if replicating) */ csa = &FILE_INFO(reg)->s_addrs; assert(csa->hdr->hasht_upgrade_needed); /* If before-image journaling is turned on in this region (does not matter if replication is turned on or not), * once this transaction is done, we need to switch to new journal file and cut the back link because * otherwise it is possible for backward journal recovery (or rollback) or source server to encounter * the journal records generated in this ^#t-upgrade-transaction in which case they dont know to handle * it properly (e.g. rollback or backward recovery does not know to restore csa->hdr->hasht_upgrade_needed * if it rolls back this transaction). To achieve this, we set hold_onto_crit to TRUE and do the jnl link * cut AFTER the transaction commits but before anyone else can sneak in to do any more updates. * Since most often we expect databases to be journaled, we do this hold_onto_crit even for the non-journaled case. */ grab_crit(reg); csa->hold_onto_crit = TRUE; DEBUG_ONLY(save_dollar_tlevel = dollar_tlevel); assert(!donot_INVOKE_MUMTSTART); DEBUG_ONLY(donot_INVOKE_MUMTSTART = TRUE); op_tstart(IMPLICIT_TSTART, TRUE, &literal_batch, 0); /* 0 ==> save no locals but RESTART OK */ ESTABLISH_NORET(trigger_upgrade_ch, est_first_pass); /* On a TP restart anywhere down below, this line is where the restart resumes execution from */ assert(donot_INVOKE_MUMTSTART); /* Make sure still set for every try/retry of TP transaction */ change_reg(); /* TP_CHANGE_REG wont work as we need to set sgm_info_ptr */ assert(NULL != cs_addrs); assert(csa == cs_addrs); SET_GVTARGET_TO_HASHT_GBL(csa); /* sets up gv_target */ assert(NULL != gv_target); INITIAL_HASHT_ROOT_SEARCH_IF_NEEDED; /* Needed to do every retry in case restart was due to an online rollback. * This also sets up gv_currkey */ /* Do actual upgrade of ^#t global. * * Below is a sample layout of the label 2 ^#t global * ------------------------------------------------------- * ^#t("#TNAME","x")="a"_$C(0)_"1" (present in DEFAULT only) * ^#t("#TRHASH",89771515,1)="a"_$C(0)_"1" (present in DEFAULT only) * ^#t("#TRHASH",106937755,1)="a"_$C(0)_"1" (present in DEFAULT only) * ^#t("a",1,"BHASH")="106937755" * ^#t("a",1,"CHSET")="M" * ^#t("a",1,"CMD")="S" * ^#t("a",1,"LHASH")="89771515" * ^#t("a",1,"TRIGNAME")="x#" * ^#t("a",1,"XECUTE")=" do ^twork" * ^#t("a","#COUNT")="1" * ^#t("a","#CYCLE")="1" * ^#t("a","#LABEL")="2" * * Below is a sample layout of the label 3 ^#t global * ------------------------------------------------------- * ^#t("#LABEL")="3" (present only after upgrade, not regular trigger load) * ^#t("#TNAME","x")="a"_$C(0)_"1" (present in CURRENT region) * ^#t("a",1,"BHASH")="71945627" * ^#t("a",1,"CHSET")="M" * ^#t("a",1,"CMD")="S" * ^#t("a",1,"LHASH")="71945627" * ^#t("a",1,"TRIGNAME")="x#" * ^#t("a",1,"XECUTE")=" do ^twork" * ^#t("a","#COUNT")="1" * ^#t("a","#CYCLE")="2" * ^#t("a","#LABEL")="3" * ^#t("a","#TRHASH",71945627,1)="a"_$C(0)_"1" * * Key aspects of the format change * ---------------------------------- * 1) New ^#t("#LABEL")="3" to indicate the format of the ^#t global. This is in addition to * ^#t("a","#LABEL") etc. which is already there. This way we have a #LABEL for not just the installed * triggers but also for the name information stored in the #TNAME nodes. * 2) In the BHASH and LHASH fields. The hash computation is different so there are more chances of BHASH and LHASH * matching in which case we store only one #TRHASH entry (instead of two). So thre is fewer ^#t records in the new * format in most cases. * 3) ^#t("a","#LABEL") bumps from 2 to 3. Similarly ^#t("a","#CYCLE") bumps by one (to make sure triggers for this * global get re-read if and when we implement an -ONLINE upgrade). * 4) DEFAULT used to have ^#t("#TNAME",...) nodes corresponding to triggers across ALL regions in the gbldir and * other regions used to have NO ^#t("#TNAME",...) nodes whereas after the upgrade every region have * ^#t("#TNAME",...) nodes corresponding to triggers installed in that region. So it is safer to kill ^#t("#TNAME") * nodes and add them as needed. * 5) #TRHASH has moved from ^#t() to ^#t(<gbl>). So it is safer to kill ^#t("#TRHASH") nodes and add them as needed. * * Below is a sample layout of the label 4 ^#t global * ------------------------------------------------------- * ^#t("#TNAME","x")="a"_$C(0)_"1" (present in CURRENT region) * ^#t("a",1,"BHASH")="71945627" * ^#t("a",1,"CHSET")="M" * ^#t("a",1,"CMD")="S" * ^#t("a",1,"LHASH")="71945627" * ^#t("a",1,"TRIGNAME")="x#" * ^#t("a",1,"XECUTE")=" do ^twork" * ^#t("a","#COUNT")="1" * ^#t("a","#CYCLE")="2" * ^#t("a","#LABEL")="4" * ^#t("a","#TRHASH",71945627,1)="a"_$C(0)_"1" * * Key aspects of the format change * ---------------------------------- * 1) Removed ^#t("#LABEL") as it is redundant information and trigger load does not include it * 2) Multiline triggers were incorrectly processed resulting in incorrect BHASH and LHASH values. Upgrade fixes this * 3) ^#t("a","#LABEL") bumps from 3 to 4. Similarly ^#t("a","#CYCLE") bumps by one (to make sure * triggers for this global get re-read if and when we implement an -ONLINE upgrade). */ tmpmv = &tmpmval; /* At all points maintain this relationship. The two are used interchangeably below */ if (gv_target->root) do_upgrade = TRUE; /* The below logic assumes ^#t global does not have any integrity errors */ assert(do_upgrade); /* caller should have not invoked us otherwise */ if (do_upgrade) { /* kill ^#t("#TRHASH"), ^#t("#TNAME") and ^#t("#LABEL") first. Regenerate each again as we process ^#t(<gbl>,...) */ csa->incr_db_trigger_cycle = TRUE; /* so that we increment csd->db_trigger_cycle at commit time. * this forces concurrent processes to read upgraded triggers. */ if (JNL_WRITE_LOGICAL_RECS(csa)) { /* Note that the ^#t upgrade is a physical layout change. But it has no logical change (i.e. users * see the same MUPIP TRIGGER -SELECT output as before). So write only a dummy LGTRIG journal * record for this operation. Hence write a string that starts with a trigger comment character ";". */ assert(!gv_cur_region->read_only); jnl_format(JNL_LGTRIG, NULL, (mval *)&literal_trigjnlrec, 0); } /* KILL ^#t("#LABEL") unconditionally */ BUILD_HASHT_SUB_CURRKEY(LITERAL_HASHLABEL, STRLEN(LITERAL_HASHLABEL)); if (0 != gvcst_data()) gvcst_kill(TRUE); /* KILL ^#t("#TNAME") unconditionally and regenerate */ BUILD_HASHT_SUB_CURRKEY(LITERAL_HASHTNAME, STRLEN(LITERAL_HASHTNAME)); if (0 != gvcst_data()) gvcst_kill(TRUE); /* KILL ^#t("#TRHASH") unconditionally and regenerate */ BUILD_HASHT_SUB_CURRKEY(LITERAL_HASHTRHASH, STRLEN(LITERAL_HASHTRHASH)); if (0 != gvcst_data()) gvcst_kill(TRUE); /* Loop through all global names for which ^#t(<gvn>) exists. The only first-level subscripts of ^#t starting * with # are #TNAME and #TRHASH in collation order. So after #TRHASH we expect to find subscripts that are * global names. Hence the HASHTRHASH code is placed AFTER the HASHTNAME code above. */ TREF(gd_targ_gvnh_reg) = NULL; /* needed so op_gvorder below goes through gvcst_order (i.e. focuses only * on the current region) and NOT through gvcst_spr_order (which does not * apply anyways in the case of ^#t). */ nullbyte[0] = '\0'; trig_protected_mval_push_count = 0; INCR_AND_PUSH_MV_STENT(gvname); /* Protect gvname from garbage collection */ do { op_gvorder(gvname); if (0 == gvname->str.len) break; assert(ARRAYSIZE(trigvn) > gvname->str.len); memcpy(&trigvn[0], gvname->str.addr, gvname->str.len); gvname->str.addr = &trigvn[0]; /* point away from stringpool to avoid stp_gcol issues */ /* Save gv_currkey->prev so it is restored before next call to op_gvorder (which cares about this field). * gv_currkey->prev gets tampered with in the for loop below (e.g. BUILD_HASHT_SUB_CURRKEY macro). * No need to do this for gv_currkey->end since the body of the for loop takes care of restoring it. */ gvname_prev = gv_currkey->prev; BUILD_HASHT_SUB_CURRKEY(gvname->str.addr, gvname->str.len); /* At this point, gv_currkey is ^#t(<gvn>) */ /* Increment ^#t(<gvn>,"#CYCLE") */ is_defined = gvtr_get_hasht_gblsubs((mval *)&literal_hashcycle, tmpmv); assert(is_defined); tmpint4 = mval2i(tmpmv); tmpint4++; i2mval(tmpmv, tmpint4); gvtr_set_hasht_gblsubs((mval *)&literal_hashcycle, tmpmv); /* Read ^#t(<gvn>,"#COUNT") */ is_defined = gvtr_get_hasht_gblsubs((mval *)&literal_hashcount, tmpmv); if (is_defined) { tmpint4 = mval2i(tmpmv); count = tmpint4; /* Get ^#t(<gvn>,"#LABEL"), error out for invalid values. Upgrade disallowed for label 1 triggers */ is_defined = gvtr_get_hasht_gblsubs((mval *)&literal_hashlabel, tmpmv); assert(is_defined); currlabel = mval2i(tmpmv); if ((V19_HASHT_GBL_LABEL_INT >= currlabel) || (HASHT_GBL_CURLABEL_INT <= currlabel)) rts_error_csa(CSA_ARG(csa) VARLSTCNT(8) ERR_TRIGUPBADLABEL, 6, currlabel, HASHT_GBL_CURLABEL_INT, gvname->str.len, gvname->str.addr, REG_LEN_STR(reg)); /* Set ^#t(<gvn>,"#LABEL")=HASHT_GBL_CURLABEL */ gvtr_set_hasht_gblsubs((mval *)&literal_hashlabel, (mval *)&literal_curlabel); } else count = 0; /* Kill ^#t(<gvn>,"#TRHASH") unconditionally and regenerate */ gvtr_kill_hasht_gblsubs((mval *)&literal_hashtrhash, TRUE); /* At this point, gv_currkey is ^#t(<gvn>) */ for (i = 1; i <= count; i++) { /* At this point, gv_currkey is ^#t(<gvn>) */ curend = gv_currkey->end; /* note gv_currkey->end before changing it so we can restore it later */ assert(KEY_DELIMITER == gv_currkey->base[curend]); assert(gv_target->gd_csa == cs_addrs); i2mval(tmpmv, i); COPY_SUBS_TO_GVCURRKEY(tmpmv, gv_cur_region, gv_currkey, was_null, is_null); /* At this point, gv_currkey is ^#t(<gvn>,i) */ /* Compute new LHASH and BHASH hash values. * LHASH uses : GVSUBS, XECUTE * BHASH uses : GVSUBS, DELIM, ZDELIM, PIECES, XECUTE * So reach each of these pieces and compute hash along the way. */ STR_PHASH_INIT(hash_state, hash_totlen); STR_PHASH_PROCESS(hash_state, hash_totlen, gvname->str.addr, gvname->str.len); STR_PHASH_PROCESS(hash_state, hash_totlen, nullbyte, 1); /* Read in ^#t(<gvn>,i,"GVSUBS") */ is_defined = gvtr_get_hasht_gblsubs((mval *)&literal_gvsubs, tmpmv); if (is_defined) { STR_PHASH_PROCESS(hash_state, hash_totlen, tmpmval.str.addr, tmpmval.str.len); STR_PHASH_PROCESS(hash_state, hash_totlen, nullbyte, 1); } /* Copy over SET hash state (2-tuple <state,totlen>) to KILL hash state before adding * the PIECES, DELIM, ZDELIM portions (those are only part of the SET hash). */ kill_hash_state = hash_state; kill_hash_totlen = hash_totlen; /* Read in ^#t(<gvn>,i,"PIECES") */ is_defined = gvtr_get_hasht_gblsubs((mval *)&literal_pieces, tmpmv); if (is_defined) { STR_PHASH_PROCESS(hash_state, hash_totlen, tmpmval.str.addr, tmpmval.str.len); STR_PHASH_PROCESS(hash_state, hash_totlen, nullbyte, 1); } /* Read in ^#t(<gvn>,i,"DELIM") */ is_defined = gvtr_get_hasht_gblsubs((mval *)&literal_delim, tmpmv); if (is_defined) { STR_PHASH_PROCESS(hash_state, hash_totlen, tmpmval.str.addr, tmpmval.str.len); STR_PHASH_PROCESS(hash_state, hash_totlen, nullbyte, 1); } /* Read in ^#t(<gvn>,i,"ZDELIM") */ is_defined = gvtr_get_hasht_gblsubs((mval *)&literal_zdelim, tmpmv); if (is_defined) { STR_PHASH_PROCESS(hash_state, hash_totlen, tmpmval.str.addr, tmpmval.str.len); STR_PHASH_PROCESS(hash_state, hash_totlen, nullbyte, 1); } /* Read in ^#t(<gvn>,i,"XECUTE"). * Note: The XECUTE portion of the trigger definition is used in SET and KILL hash. * But since we have started maintaining "hash_state" and "kill_hash_state" separately * (due to PIECES, DELIM, ZDELIM) we need to update the hash for both using same input string. */ is_defined = gvtr_get_hasht_gblsubs((mval *)&literal_xecute, tmpmv); if (is_defined) { STR_PHASH_PROCESS(hash_state, hash_totlen, tmpmval.str.addr, tmpmval.str.len); STR_PHASH_PROCESS(kill_hash_state, kill_hash_totlen, tmpmval.str.addr, tmpmval.str.len); } else { /* Multi-record XECUTE string */ /* At this point, gv_currkey is ^#t(<gvn>,i) */ xecute_curend = gv_currkey->end; /* note gv_currkey->end so we can restore it later */ assert(KEY_DELIMITER == gv_currkey->base[xecute_curend]); tmpmv2 = (mval *)&literal_xecute; COPY_SUBS_TO_GVCURRKEY(tmpmv2, gv_cur_region, gv_currkey, was_null, is_null); xecutei = 1; do { i2mval(&xecuteimval, xecutei); is_defined = gvtr_get_hasht_gblsubs(&xecuteimval, tmpmv); if (!is_defined) break; STR_PHASH_PROCESS(hash_state, hash_totlen, tmpmval.str.addr, tmpmval.str.len); STR_PHASH_PROCESS(kill_hash_state, kill_hash_totlen, tmpmval.str.addr, tmpmval.str.len); xecutei++; } while (TRUE); /* Restore gv_currkey to ^#t(<gvn>,i) */ gv_currkey->end = xecute_curend; gv_currkey->base[xecute_curend] = KEY_DELIMITER; } STR_PHASH_RESULT(hash_state, hash_totlen, hash_code); STR_PHASH_RESULT(kill_hash_state, kill_hash_totlen, kill_hash_code); /* Set ^#t(<gvn>,i,"LHASH") */ MV_FORCE_UMVAL(tmpmv, kill_hash_code); gvtr_set_hasht_gblsubs((mval *)&literal_lhash, tmpmv); /* Set ^#t(<gvn>,i,"BHASH") */ MV_FORCE_UMVAL(tmpmv, hash_code); gvtr_set_hasht_gblsubs((mval *)&literal_bhash, tmpmv); /* Read in ^#t(<gvn>,i,"TRIGNAME") to determine if #SEQNUM/#TNCOUNT needs to be maintained */ is_defined = gvtr_get_hasht_gblsubs((mval *)&literal_trigname, tmpmv); assert(is_defined); assert('#' == tmpmval.str.addr[tmpmval.str.len - 1]); tmpmval.str.len--; if ((tmpmval.str.len <= ARRAYSIZE(name_and_index)) && (NULL != (ptr = memchr(tmpmval.str.addr, '#', tmpmval.str.len)))) { /* Auto-generated name. Need to maintain #SEQNUM/#TNCOUNT */ /* Take copy of trigger name into non-stringpool location to avoid stp_gcol issues */ trigname_len = ptr - tmpmval.str.addr; ptr++; name_index_len = (tmpmval.str.addr + tmpmval.str.len) - ptr; assert(ARRAYSIZE(name_and_index) >= (trigname_len + 1 + name_index_len)); trigname = &name_and_index[0]; trigindex = ptr; memcpy(trigname, tmpmval.str.addr, tmpmval.str.len); A2I(ptr, ptr + name_index_len, trig_seq_num); /* At this point, gv_currkey is ^#t(<gvn>,i) */ /* $get(^#t("#TNAME",<trigger name>,"#SEQNUM")) */ BUILD_HASHT_SUB_SUB_SUB_CURRKEY(LITERAL_HASHTNAME, STR_LIT_LEN(LITERAL_HASHTNAME), trigname, trigname_len, LITERAL_HASHSEQNUM, STR_LIT_LEN(LITERAL_HASHSEQNUM)); seq_num = gvcst_get(tmpmv) ? mval2i(tmpmv) : 0; if (trig_seq_num > seq_num) { /* Set ^#t("#TNAME",<trigger name>,"#SEQNUM") = trig_seq_num */ SET_TRIGGER_GLOBAL_SUB_SUB_SUB_STR(LITERAL_HASHTNAME, STR_LIT_LEN(LITERAL_HASHTNAME), trigname, trigname_len, LITERAL_HASHSEQNUM, STR_LIT_LEN(LITERAL_HASHSEQNUM), trigindex, name_index_len, result); assert(PUT_SUCCESS == result); } /* set ^#t("#TNAME",<trigger name>,"#TNCOUNT")++ */ BUILD_HASHT_SUB_SUB_SUB_CURRKEY(LITERAL_HASHTNAME, STR_LIT_LEN(LITERAL_HASHTNAME), trigname, trigname_len, LITERAL_HASHTNCOUNT, STR_LIT_LEN(LITERAL_HASHTNCOUNT)); tncount = gvcst_get(tmpmv) ? mval2i(tmpmv) + 1 : 1; i2mval(tmpmv, tncount); SET_TRIGGER_GLOBAL_SUB_SUB_SUB_MVAL(LITERAL_HASHTNAME, STR_LIT_LEN(LITERAL_HASHTNAME), trigname, trigname_len, LITERAL_HASHTNCOUNT, STR_LIT_LEN(LITERAL_HASHTNCOUNT), tmpmval, result); trigname_len += 1 + name_index_len; /* in preparation for ^#t("#TNAME") set below */ assert(PUT_SUCCESS == result); BUILD_HASHT_SUB_CURRKEY(gvname->str.addr, gvname->str.len); /* At this point, gv_currkey is ^#t(<gvn>) */ } else { /* Take copy of trigger name into non-stringpool location to avoid stp_gcol issues */ trigname = &name_and_index[0]; /* in preparation for ^#t("#TNAME") set below */ trigname_len = MIN(tmpmval.str.len, ARRAYSIZE(name_and_index)); assert(ARRAYSIZE(name_and_index) >= trigname_len); memcpy(trigname, tmpmval.str.addr, trigname_len); /* Restore gv_currkey to what it was at beginning of for loop iteration */ gv_currkey->end = curend; gv_currkey->base[curend] = KEY_DELIMITER; } /* At this point, gv_currkey is ^#t(<gvn>) */ if (kill_hash_code != hash_code) gvtr_set_hashtrhash(gvname->str.addr, gvname->str.len, kill_hash_code, i); /* Set ^#t(<gvn>,"#TRHASH",hash_code,i) */ gvtr_set_hashtrhash(gvname->str.addr, gvname->str.len, hash_code, i); /* Set ^#t("#TNAME",<trigname>)=<gvn>_$c(0)_<trigindx> */ /* The upgrade assumes that the region does not contain two triggers with the same name. * V62000 and before could potentially have this out of design case. Once implemented * the trigger integrity check will warn users of this edge case */ ptr = &trigvn[gvname->str.len]; *ptr++ = '\0'; ilen = 0; I2A(ptr, ilen, i); ptr += ilen; assert(ptr <= ARRAYTOP(trigvn)); SET_TRIGGER_GLOBAL_SUB_SUB_STR(LITERAL_HASHTNAME, STR_LIT_LEN(LITERAL_HASHTNAME), trigname, trigname_len, trigvn, ptr - gvname->str.addr, result); assert(PUT_SUCCESS == result); BUILD_HASHT_SUB_CURRKEY(gvname->str.addr, gvname->str.len); /* At this point, gv_currkey is ^#t(<gvn>) */ } /* At this point, gv_currkey is ^#t(<gvn>) i.e. gv_currkey->end is correct but gv_currkey->prev * might have been tampered with. Restore it to proper value first. */ gv_currkey->prev = gvname_prev; gvname->mvtype = 0; /* can now be garbage collected in the next iteration */ } while (TRUE); } op_tcommit(); REVERT; /* remove our condition handler */ DEBUG_ONLY(donot_INVOKE_MUMTSTART = FALSE;) if (csa->hold_onto_crit)
/* Workhorse of fetching source for given trigger. */ STATICFNDEF void trigger_fill_xecute_buffer_read_trigger_source(gv_trigger_t *trigdsc) { enum cdb_sc cdb_status; int4 index; mstr gbl, xecute_buff; mval trig_index; sgmnt_addrs *csa; sgmnt_data_ptr_t csd; gvt_trigger_t *gvt_trigger; gv_namehead *gvt; gv_namehead *save_gv_target; gd_region *save_gv_cur_region; sgm_info *save_sgm_info_ptr; gv_key save_currkey[DBKEYALLOC(MAX_KEY_SZ)]; assert(0 < dollar_tlevel); assert(NULL != trigdsc); SAVE_TRIGGER_REGION_INFO(save_currkey); gvt_trigger = trigdsc->gvt_trigger; /* We now know our base block now */ index = trigdsc - gvt_trigger->gv_trig_array + 1; /* We now know our trigger index value */ i2mval(&trig_index, index); DBGTRIGR((stderr, "trigger_fill_xecute_buffer_read_trigger_source: entry $tlevel:%d\tindex:%d of %d\n", dollar_tlevel, index, gvt_trigger->num_gv_triggers)); gvt = gv_target = gvt_trigger->gv_target; /* gv_target contains global name */ gbl.addr = gvt->gvname.var_name.addr; gbl.len = gvt->gvname.var_name.len; /* Our situation is that while our desired gv_target has csa information, we don't know specifically * which global directory was in use so we can't run gv_bind_name() lest we find the given global * name in the wrong global directory thus running the wrong triggers. But we know this target is * properly formed since it had to be when it was recorded when the triggers were loaded. Because of * that, we can get the correct csa and gv_target and csa-region will point us to a region that will * work even if it isn't exactly the one we used to get to this trigger. */ TP_CHANGE_REG_IF_NEEDED(gvt->gd_csa->region); csa = cs_addrs; csd = csa->hdr; assert(csd == cs_data); tp_set_sgm(); /* See if we need to reload our triggers */ if ((csa->db_trigger_cycle != gvt->db_trigger_cycle) || (csa->db_dztrigger_cycle && (gvt->db_dztrigger_cycle != csa->db_dztrigger_cycle))) { /* The process' view of the triggers could be potentially stale. Restart to be safe. * Triggers can be invoked only by GT.M and Update process. Out of these, we expect only * GT.M to see restarts due to concurrent trigger changes. Update process is the only * updater on the secondary so we dont expect it to see any concurrent trigger changes * Assert accordingly. */ DBGTRIGR((stderr, "trigger_fill_xecute_buffer_read_trigger_source: stale trigger view\n")); assert(CDB_STAGNATE > t_tries); assert(IS_GTM_IMAGE); t_retry(cdb_sc_triggermod); } SET_GVTARGET_TO_HASHT_GBL(csa); INITIAL_HASHT_ROOT_SEARCH_IF_NEEDED; assert(0 == trigdsc->xecute_str.str.len); /* Make sure not replacing/losing a buffer */ xecute_buff.addr = trigger_gbl_fill_xecute_buffer(gbl.addr, gbl.len, &trig_index, NULL, (int4 *)&xecute_buff.len); trigdsc->xecute_str.str = xecute_buff; /* Restore gv_target/gv_currkey which need to be kept in sync */ RESTORE_TRIGGER_REGION_INFO(save_currkey); return; }