[Maria-developers] doubts about show ___ any information table plugin

hi guys ! :) i was reading this: https://mariadb.com/kb/en/mariadb/development/mariadb-internals-documentatio... and i'm with some doubts... automatically parser translate "_" to space? for example table A_B, i could use SHOW A B ? about the FLUSH what it does? any example of what it should do? like... i know we can reset some information counters, it's a 'shortcut' to avoid something like "SET pluginvariable=0"? if yes, maybe we could add some example at KB page, i'm with doubts, maybe a dba without knowledge about plugin internal will not understand thanks :) -- Roberto Spadim SPAEmpresarial Eng. Automação e Controle