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commit 147829456e3062c63a06b9c07ab2e9a22b7b664a
Author: Brent Doil <[email protected]>
AuthorDate: Thu Jan 25 12:02:55 2024 -0500

    Check for multi-column LIST partition keys
    
    Partitioned tabled with a LIST partition key
    containing multiple columns is not supported
    in GP7. Add a check to find and output the
    offending tables.
---
 src/bin/pg_upgrade/greenplum/check_gp.c | 74 ++++++++++++++++++++++++++++++++-
 1 file changed, 73 insertions(+), 1 deletion(-)

diff --git a/src/bin/pg_upgrade/greenplum/check_gp.c 
b/src/bin/pg_upgrade/greenplum/check_gp.c
index b0b1f4c121..3b8f12a8e3 100644
--- a/src/bin/pg_upgrade/greenplum/check_gp.c
+++ b/src/bin/pg_upgrade/greenplum/check_gp.c
@@ -25,7 +25,7 @@ static void check_partition_indexes(void);
 static void check_orphaned_toastrels(void);
 static void check_online_expansion(void);
 static void check_for_array_of_partition_table_types(ClusterInfo *cluster);
-
+static void check_multi_column_list_partition_keys(ClusterInfo *cluster);
 
 /*
  *     check_greenplum
@@ -44,6 +44,7 @@ check_greenplum(void)
        check_partition_indexes();
        check_orphaned_toastrels();
        check_for_array_of_partition_table_types(&old_cluster);
+       check_multi_column_list_partition_keys(&old_cluster);
 }
 
 /*
@@ -564,6 +565,77 @@ check_for_array_of_partition_table_types(ClusterInfo 
*cluster)
        check_ok();
 }
 
+static void
+check_multi_column_list_partition_keys(ClusterInfo *cluster)
+{
+       char                    output_path[MAXPGPATH];
+       FILE               *script = NULL;
+       bool                    found = false;
+       int                             dbnum;
+
+       prep_status("Checking for multi-column LIST partition keys");
+
+       snprintf(output_path, sizeof(output_path), "%s/%s",
+                        log_opts.basedir, "multi_column_list_partitions.txt");
+
+       for (dbnum = 0; dbnum < old_cluster.dbarr.ndbs; dbnum++)
+       {
+               PGresult   *res;
+               bool            db_used = false;
+               int                     ntups;
+               int                     rowno;
+               int                     i_nspname,
+                                       i_relname;
+               DbInfo     *active_db = &old_cluster.dbarr.dbs[dbnum];
+               PGconn     *conn = connectToServer(&old_cluster, 
active_db->db_name);
+
+               res = executeQueryOrDie(conn,
+                        "SELECT n.nspname, c.relname "
+                        "FROM pg_class c "
+                        "JOIN pg_namespace n on n.oid=c.relnamespace "
+                        "JOIN pg_partition p on p.parrelid=c.oid "
+                        "WHERE parkind = 'l' and parnatts > 1");
+
+               ntups = PQntuples(res);
+               i_nspname = PQfnumber(res, "nspname");
+               i_relname = PQfnumber(res, "relname");
+               for (rowno = 0; rowno < ntups; rowno++)
+               {
+                       found = true;
+                       if (script == NULL && (script = fopen_priv(output_path, 
"w")) == NULL)
+                               pg_fatal("could not open file \"%s\": %s\n",
+                                                output_path, strerror(errno));
+                       if (!db_used)
+                       {
+                               fprintf(script, "In database: %s\n", 
active_db->db_name);
+                               db_used = true;
+                       }
+                       fprintf(script, "  %s.%s\n",
+                                       PQgetvalue(res, rowno, i_nspname),
+                                       PQgetvalue(res, rowno, i_relname));
+               }
+
+               PQclear(res);
+               PQfinish(conn);
+       }
+
+       if (found)
+       {
+               fclose(script);
+               pg_log(PG_REPORT, "fatal\n");
+               gp_fatal_log(
+                          "| Your installation contains partitioned tables\n"
+                          "| with a LIST partition key containing multiple\n"
+                          "| columns, which is not supported anymore. 
Consider\n"
+                          "| modifying the partition key to use a single 
column\n"
+                          "| or dropping the tables. A list of the problem 
tables\n"
+                          "| is in the file:\n\t%s\n\n", output_path);
+       }
+       else
+               check_ok();
+}
+
+
 void
 setup_GPDB6_data_type_checks(ClusterInfo *cluster)
 {


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