diff options
Diffstat (limited to 'src/backend/postmaster/postmaster.c')
| -rw-r--r-- | src/backend/postmaster/postmaster.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c index b7f99fc18d3..5db01d104a1 100644 --- a/src/backend/postmaster/postmaster.c +++ b/src/backend/postmaster/postmaster.c @@ -1884,10 +1884,23 @@ retry1: port->cmdline_options = pstrdup(valptr); else if (strcmp(nameptr, "replication") == 0) { - if (!parse_bool(valptr, &am_walsender)) + /* + * Due to backward compatibility concerns the replication + * parameter is a hybrid beast which allows the value to be + * either boolean or the string 'database'. The latter + * connects to a specific database which is e.g. required for + * logical decoding while. + */ + if (strcmp(valptr, "database") == 0) + { + am_walsender = true; + am_db_walsender = true; + } + else if (!parse_bool(valptr, &am_walsender)) ereport(FATAL, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), - errmsg("invalid value for boolean option \"replication\""))); + errmsg("invalid value for parameter \"replication\""), + errhint("Valid values are: false, 0, true, 1, database."))); } else { @@ -1968,8 +1981,15 @@ retry1: if (strlen(port->user_name) >= NAMEDATALEN) port->user_name[NAMEDATALEN - 1] = '\0'; - /* Walsender is not related to a particular database */ - if (am_walsender) + /* + * Normal walsender backends, e.g. for streaming replication, are not + * connected to a particular database. But walsenders used for logical + * replication need to connect to a specific database. We allow streaming + * replication commands to be issued even if connected to a database as it + * can make sense to first make a basebackup and then stream changes + * starting from that. + */ + if (am_walsender && !am_db_walsender) port->database_name[0] = '\0'; /* |