diff --git a/src/manage_pg_server.c b/src/manage_pg_server.c
index 1772b20f5..85cd8afa8 100644
--- a/src/manage_pg_server.c
+++ b/src/manage_pg_server.c
@@ -37,54 +37,6 @@
 PG_MODULE_MAGIC;
 #endif
 
-/**
- * @brief Create a string from a portion of text.
- *
- * @param[in]  text_arg  Text.
- * @param[in]  length    Length to create.
- *
- * @return Freshly allocated string.
- */
-static char *
-textndup (text *text_arg, int length)
-{
-  char *ret;
-  ret = palloc (length + 1);
-  memcpy (ret, VARDATA (text_arg), length);
-  ret[length] = 0;
-  return ret;
-}
-
-/**
- * @brief Get the maximum number of hosts.
- *
- * @return The maximum number of hosts.
- */
-static int
-get_max_hosts ()
-{
-  int ret;
-  int max_hosts = 4095;
-  SPI_connect ();
-  ret = SPI_exec ("SELECT coalesce ((SELECT value FROM meta"
-                  "                  WHERE name = 'max_hosts'),"
-                  "                 '4095');", /* Same as MANAGE_MAX_HOSTS. */
-                  1); /* Max 1 row returned. */
-  if (SPI_processed > 0 && ret > 0 && SPI_tuptable != NULL)
-    {
-      char *cell;
-
-      cell = SPI_getvalue (SPI_tuptable->vals[0], SPI_tuptable->tupdesc, 1);
-      elog (DEBUG1, "cell: %s", cell);
-      if (cell)
-        max_hosts = atoi (cell);
-    }
-  elog (DEBUG1, "done");
-  SPI_finish ();
-
-  return max_hosts;
-}
-
 /**
  * @brief Define function for Postgres.
  */
@@ -97,35 +49,11 @@ PG_FUNCTION_INFO_V1 (sql_hosts_contains);
  *
  * @return Postgres Datum.
  */
+ __attribute__((deprecated))
 Datum
 sql_hosts_contains (PG_FUNCTION_ARGS)
 {
-  if (PG_ARGISNULL (0) || PG_ARGISNULL (1))
-    PG_RETURN_BOOL (0);
-  else
-    {
-      text *hosts_arg, *find_host_arg;
-      char *hosts, *find_host;
-      int max_hosts, ret;
-
-      hosts_arg = PG_GETARG_TEXT_P(0);
-      hosts = textndup (hosts_arg, VARSIZE (hosts_arg) - VARHDRSZ);
-
-      find_host_arg = PG_GETARG_TEXT_P(1);
-      find_host = textndup (find_host_arg, VARSIZE (find_host_arg) - VARHDRSZ);
-
-      max_hosts = get_max_hosts ();
-
-      if (hosts_str_contains ((gchar *) hosts, (gchar *) find_host,
-                              max_hosts))
-        ret = 1;
-      else
-        ret = 0;
-
-      pfree (hosts);
-      pfree (find_host);
-      PG_RETURN_BOOL (ret);
-    }
+  PG_RETURN_NULL ();
 }
 
 /**
@@ -200,46 +128,11 @@ PG_FUNCTION_INFO_V1 (sql_next_time_ical);
  *
  * @return Postgres Datum.
  */
+ __attribute__((deprecated))
 Datum
 sql_next_time_ical (PG_FUNCTION_ARGS)
 {
-  char *ical_string, *zone;
-  int periods_offset;
-  int32 ret;
-
-  if (PG_NARGS() < 1 || PG_ARGISNULL (0))
-    {
-      PG_RETURN_NULL ();
-    }
-  else
-    {
-      text* ical_string_arg;
-      ical_string_arg = PG_GETARG_TEXT_P (0);
-      ical_string = textndup (ical_string_arg,
-                              VARSIZE (ical_string_arg) - VARHDRSZ);
-    }
-
-  if (PG_NARGS() < 2 || PG_ARGISNULL (1))
-    zone = NULL;
-  else
-    {
-      text* timezone_arg;
-      timezone_arg = PG_GETARG_TEXT_P (1);
-      zone = textndup (timezone_arg, VARSIZE (timezone_arg) - VARHDRSZ);
-    }
-
-  if (PG_NARGS() < 3)
-    periods_offset = 0;
-  else
-    periods_offset = PG_GETARG_INT32 (2);
-
-  ret = icalendar_next_time_from_string (ical_string, zone,
-                                         periods_offset);
-  if (ical_string)
-    pfree (ical_string);
-  if (zone)
-    pfree (zone);
-  PG_RETURN_INT32 (ret);
+  PG_RETURN_NULL ();
 }
 
 /**
@@ -254,43 +147,11 @@ PG_FUNCTION_INFO_V1 (sql_max_hosts);
  *
  * @return Postgres Datum.
  */
+ __attribute__((deprecated))
 Datum
 sql_max_hosts (PG_FUNCTION_ARGS)
 {
-  if (PG_ARGISNULL (0))
-    PG_RETURN_INT32 (0);
-  else
-    {
-      text *hosts_arg;
-      char *hosts, *exclude, *clean_hosts, *clean_exclude;
-      int ret, max_hosts;
-
-      hosts_arg = PG_GETARG_TEXT_P (0);
-      hosts = textndup (hosts_arg, VARSIZE (hosts_arg) - VARHDRSZ);
-      clean_hosts = clean_hosts_string (hosts);
-
-      if (PG_ARGISNULL (1))
-        {
-          exclude = palloc (1);
-          exclude[0] = 0;
-          clean_exclude = NULL;
-        }
-      else
-        {
-          text *exclude_arg;
-          exclude_arg = PG_GETARG_TEXT_P (1);
-          exclude = textndup (exclude_arg, VARSIZE (exclude_arg) - VARHDRSZ);
-          clean_exclude = clean_hosts_string (exclude);
-        }
-
-      max_hosts = get_max_hosts ();
-      ret = manage_count_hosts_max (clean_hosts, clean_exclude, max_hosts);
-      pfree (hosts);
-      pfree (exclude);
-      g_free (clean_hosts);
-      g_free (clean_exclude);
-      PG_RETURN_INT32 (ret);
-    }
+  PG_RETURN_NULL ();
 }
 
 /**
@@ -324,32 +185,11 @@ PG_FUNCTION_INFO_V1 (sql_regexp);
  *
  * @return Postgres Datum.
  */
+ __attribute__((deprecated))
 Datum
 sql_regexp (PG_FUNCTION_ARGS)
 {
-  if (PG_ARGISNULL (0) || PG_ARGISNULL (1))
-    PG_RETURN_BOOL (0);
-  else
-    {
-      text *string_arg, *regexp_arg;
-      char *string, *regexp;
-      int ret;
-
-      regexp_arg = PG_GETARG_TEXT_P(1);
-      regexp = textndup (regexp_arg, VARSIZE (regexp_arg) - VARHDRSZ);
-
-      string_arg = PG_GETARG_TEXT_P(0);
-      string = textndup (string_arg, VARSIZE (string_arg) - VARHDRSZ);
-
-      if (g_regex_match_simple ((gchar *) regexp, (gchar *) string, 0, 0))
-        ret = 1;
-      else
-        ret = 0;
-
-      pfree (string);
-      pfree (regexp);
-      PG_RETURN_BOOL (ret);
-    }
+  PG_RETURN_NULL ();
 }
 
 /**