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kelvichkelvich
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merge with pg_tstmd repo
2 parents e6885f3 + b507fd2 commit a8b2483

30 files changed

+1349
-151
lines changed

‎.gitignore

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@@ -38,3 +38,4 @@ lib*.pc
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/Debug/
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/Release/
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/tmp_install/
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‎contrib/pg_tsdtm/Makefile

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@@ -14,3 +14,10 @@ top_builddir = ../..
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include $(top_builddir)/src/Makefile.global
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include $(top_srcdir)/contrib/contrib-global.mk
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endif
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# ifndef PG_CONFIG
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# PG_CONFIG = pg_config
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# endif
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# PGXS := $(shell $(PG_CONFIG) --pgxs)
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# include $(PGXS)

‎contrib/pg_tsdtm/dtm_recovery/dtm_recovery.cpp

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#include <iostream>
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#include <string>
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#include <vector>
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#include <set>
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#include <pqxx/connection>
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#include <pqxx/transaction>
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#include <pqxx/nontransaction>
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using namespace std;
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using namespace pqxx;
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int main (int argc, char* argv[])
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{
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if (argc == 1){
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printf("Use -h to show usage options\n");
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return 1;
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}
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vector<string> connections;
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set<string> prepared_xacts;
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set<string> committed_xacts;
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bool verbose = false;
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for (int i = 1; i < argc; i++) {
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if (argv[i][0] == '-') {
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switch (argv[i][1]) {
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case 'C':
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case 'c':
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connections.push_back(string(argv[++i]));
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continue;
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case 'v':
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verbose = true;
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continue;
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}
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}
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printf("Perform recovery of pg_tsdtm cluster.\n"
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"Usage: dtm_recovery {options}\n"
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"Options:\n"
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"\t-c STR\tdatabase connection string\n"
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"\t-v\tverbose mode: print extra information while processing\n");
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return 1;
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}
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if (verbose) {
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cout << "Collecting information about prepared transactions...\n";
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}
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for (vector<string>::iterator ic = connections.begin(); ic != connections.end(); ++ic)
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{
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if (verbose) {
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cout << "Connecting to " << *ic << "...\n";
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}
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connection con(*ic);
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work txn(con);
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result r = txn.exec("select gid from pg_prepared_xacts");
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for (result::const_iterator it = r.begin(); it != r.end(); ++it)
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{
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string gid = it.at("gid").as(string());
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prepared_xacts.insert(gid);
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}
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txn.commit();
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}
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if (verbose) {
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cout << "Prepared transactions: ";
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for (set<string>::iterator it = prepared_xacts.begin(); it != prepared_xacts.end(); ++it)
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{
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cout << *it << ", ";
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}
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cout << "\nChecking which of them are committed...\n";
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}
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for (vector<string>::iterator ic = connections.begin(); ic != connections.end(); ++ic)
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{
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if (verbose) {
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cout << "Connecting to " << *ic << "...\n";
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}
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connection con(*ic);
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work txn(con);
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con.prepare("commit-check", "select * from pg_committed_xacts where gid=$1");
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for (set<string>::iterator it = prepared_xacts.begin(); it != prepared_xacts.end(); ++it)
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{
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string gid = *it;
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result r = txn.prepared("commit-check")(gid).exec();
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if (!r.empty()) {
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committed_xacts.insert(gid);
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}
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}
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txn.commit();
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}
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if (verbose) {
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cout << "Committed transactions: ";
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for (set<string>::iterator it = committed_xacts.begin(); it != committed_xacts.end(); ++it)
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{
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cout << *it << ", ";
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}
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cout << "\nCommitting them at all nodes...\n";
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}
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for (vector<string>::iterator ic = connections.begin(); ic != connections.end(); ++ic)
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{
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if (verbose) {
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cout << "Connecting to " << *ic << "...\n";
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}
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connection con(*ic);
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work txn(con);
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con.prepare("commit-check", "select * from pg_committed_xacts where gid=$1");
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con.prepare("commit-prepared", "commit prepared $1");
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con.prepare("rollback-prepared", "rollback prepared $1");
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result r = txn.exec("select gid from pg_prepared_xacts");
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for (result::const_iterator it = r.begin(); it != r.end(); ++it)
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{
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string gid = it.at("gid").as(string());
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result rc = txn.prepared("commit-check")(gid).exec();
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if (rc.empty()) {
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if (committed_xacts.find(gid) != committed_xacts.end()) {
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if (verbose) {
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cout << "Commit transaction " << gid << "\n";
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}
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txn.prepared("commit-prepared")(gid);
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} else {
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if (verbose) {
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cout << "Rollback transaction " << gid << "\n";
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}
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txn.prepared("rollback-prepared")(gid);
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}
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}
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}
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txn.commit();
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}
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if (verbose) {
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cout << "Recovery completed\n";
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}
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return 0;
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}

‎contrib/pg_tsdtm/dtm_recovery/makefile

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CXX=g++
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CXXFLAGS=-g -Wall -O0 -pthread
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all: dtm_recovery
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dtm_recovery: dtm_recovery.cpp
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$(CXX) $(CXXFLAGS) -o dtm_recovery dtm_recovery.cpp -lpqxx
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clean:
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rm -f dtm_recovery

‎contrib/pg_tsdtm/pg_dtm--1.0.sql

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@@ -20,3 +20,7 @@ LANGUAGE C;
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CREATE FUNCTION dtm_end_prepare(gtid cstring, csn bigint) RETURNS void
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AS 'MODULE_PATHNAME','dtm_end_prepare'
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LANGUAGE C;
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CREATE FUNCTION dtm_get_csn(xid integer) RETURNS bigint
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AS 'MODULE_PATHNAME','dtm_get_csn'
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LANGUAGE C;

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