参见 src/backend/replication/walsender.c
/*
* Return a string constant representing the state. This is used
* in system views, and should *not* be translated.
*/
static const char *
WalSndGetStateString(WalSndState state)
{
switch (state)
{
case WALSNDSTATE_STARTUP:
return "startup";
case WALSNDSTATE_BACKUP:
return "backup";
case WALSNDSTATE_CATCHUP:
return "catchup";
case WALSNDSTATE_STREAMING:
return "streaming";
case WALSNDSTATE_STOPPING:
return "stopping";
}
return "UNKNOWN";
}
更改历史记录
WALSNDSTATE_STOPPING 添加到 PostgreSQL 9.4 及更高版本，作为错误修复提交 1cdc0ab9 的一部分。