pg_upgrade: preserve the timestamp epoch

This is useful for replication tools like Slony and Skytools.  This is a
backpatch of a74a4aa23bb95b590ff01ee564219d2eacea3706.

Report by Sergey Konoplev

Backpatch through 9.3

diff --git a/contrib/pg_upgrade/controldata.c b/contrib/pg_upgrade/controldata.c
index 13c95a2e2e90c081b3d496c3705c00fb78ccb86a..16f535b37b65693eefece8245ca1bc4f94436eee 100644 (file)
--- a/contrib/pg_upgrade/controldata.c
+++ b/contrib/pg_upgrade/controldata.c
@@ -233,16 +233,20 @@ get_control_data(ClusterInfo *cluster, bool live_check)
        }
        else if ((p = strstr(bufin, "Latest checkpoint's NextXID:")) != NULL)
        {
-           char       *op = strchr(p, '/');
+           p = strchr(p, ':');
+
+           if (p == NULL || strlen(p) <= 1)
+               pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 
-           if (op == NULL)
-               op = strchr(p, ':');
+           p++;                /* removing ':' char */
+           cluster->controldata.chkpnt_nxtepoch = str2uint(p);
 
-           if (op == NULL || strlen(op) <= 1)
+           p = strchr(p, '/');
+           if (p == NULL || strlen(p) <= 1)
                pg_fatal("%d: controldata retrieval problem\n", __LINE__);
 
-           op++;               /* removing ':' char */
-           cluster->controldata.chkpnt_nxtxid = str2uint(op);
+           p++;                /* removing '/' char */
+           cluster->controldata.chkpnt_nxtxid = str2uint(p);
            got_xid = true;
        }
        else if ((p = strstr(bufin, "Latest checkpoint's NextOID:")) != NULL)

diff --git a/contrib/pg_upgrade/pg_upgrade.c b/contrib/pg_upgrade/pg_upgrade.c
index 16ffd5f652a9d155148f1fca9086e9567040b4da..7a18e4e5f8a1d80a10fdf70058ec1b758339719e 100644 (file)
--- a/contrib/pg_upgrade/pg_upgrade.c
+++ b/contrib/pg_upgrade/pg_upgrade.c
@@ -422,12 +422,16 @@ copy_clog_xlog_xid(void)
    /* copy old commit logs to new data dir */
    copy_subdir_files("pg_clog");
 
-   /* set the next transaction id of the new cluster */
-   prep_status("Setting next transaction ID for new cluster");
+   /* set the next transaction id and epoch of the new cluster */
+   prep_status("Setting next transaction ID and epoch for new cluster");
    exec_prog(UTILITY_LOG_FILE, NULL, true,
              "\"%s/pg_resetxlog\" -f -x %u \"%s\"",
              new_cluster.bindir, old_cluster.controldata.chkpnt_nxtxid,
              new_cluster.pgdata);
+   exec_prog(UTILITY_LOG_FILE, NULL, true,
+             "\"%s/pg_resetxlog\" -f -e %u \"%s\"",
+             new_cluster.bindir, old_cluster.controldata.chkpnt_nxtepoch,
+             new_cluster.pgdata);
    check_ok();
 
    /*

diff --git a/contrib/pg_upgrade/pg_upgrade.h b/contrib/pg_upgrade/pg_upgrade.h
index 5619dc2c8dedcf74275f5d6564498c564d3f8d3b..5dc7895f9f5b1e46c0e9d28f0033a9417e7c7cf2 100644 (file)
--- a/contrib/pg_upgrade/pg_upgrade.h
+++ b/contrib/pg_upgrade/pg_upgrade.h
@@ -190,6 +190,7 @@ typedef struct
    char        nextxlogfile[25];
    uint32      chkpnt_tli;
    uint32      chkpnt_nxtxid;
+   uint32      chkpnt_nxtepoch;
    uint32      chkpnt_nxtoid;
    uint32      chkpnt_nxtmulti;
    uint32      chkpnt_nxtmxoff;