anonymous_namespace{metadata.cc} Namespace Reference

Classes
class	Update_context
class	View_metadata_update_ctx
	Holds context during I_S table referencing view's status/column metadata update. More...

Functions
const dd::String_type	PLUGIN_VERSION_STRING ("plugin_version")
const dd::String_type	SERVER_I_S_TABLE_STRING ("server_i_s_table")
bool	store_in_dd (THD *thd, Update_context *ctx, ST_SCHEMA_TABLE *schema_table, unsigned int version)
	Store metadata from ST_SCHEMA_TABLE into DD tables. More...
static bool	store_plugin_metadata (THD *thd, plugin_ref plugin, Update_context *ctx)
	Helper method to store plugin IS table metadata into DD. More...
bool	store_plugin_and_referencing_views_metadata (THD *thd, plugin_ref plugin, void *arg)
	Store plugin IS table metadata into DD. More...
bool	update_plugins_I_S_metadata (THD *thd)
	Iterate through dynamic I_S plugins, and store I_S table metadata into dictionary, during MySQL server startup. More...
bool	create_system_views (THD *thd, bool is_non_dd_based)
bool	create_non_dd_based_system_views (THD *thd)
bool	update_server_I_S_metadata (THD *thd)
	Does following during server restart. More...
bool	initialize (THD *thd, bool non_dd_based_system_view)

Variables
unsigned int	UNKNOWN_PLUGIN_VERSION = -1

Function Documentation

create_non_dd_based_system_views()

bool anonymous_namespace{metadata.cc}::create_non_dd_based_system_views

(

THD *

thd

)

create_system_views()

bool anonymous_namespace{metadata.cc}::create_system_views	(	THD *	thd,
		bool	is_non_dd_based
	)

initialize()

bool anonymous_namespace{metadata.cc}::initialize	(	THD *	thd,
		bool	non_dd_based_system_view
	)

PLUGIN_VERSION_STRING()

const dd::String_type anonymous_namespace{metadata.cc}::PLUGIN_VERSION_STRING

(

"plugin_version"

)

SERVER_I_S_TABLE_STRING()

const dd::String_type anonymous_namespace{metadata.cc}::SERVER_I_S_TABLE_STRING

(

"server_i_s_table"

)

store_in_dd()

bool anonymous_namespace{metadata.cc}::store_in_dd	(	THD *	thd,
		Update_context *	ctx,
		ST_SCHEMA_TABLE *	schema_table,
		unsigned int	version
	)

Store metadata from ST_SCHEMA_TABLE into DD tables.

Store option plugin_version=version, if it is not UNKNOWN_PLUGIN_VERSION, otherwise store server_i_s_table=true.

Parameters

thd	Thread
ctx	Update context.
schema_table	Pointer to ST_SCHEMA_TABLE contain metadata of IS table.
version	Plugin version.

Returns

false on success, else true.

store_plugin_and_referencing_views_metadata()

bool anonymous_namespace{metadata.cc}::store_plugin_and_referencing_views_metadata	(	THD *	thd,
		plugin_ref	plugin,
		void *	arg
	)

Store plugin IS table metadata into DD.

Update column metadata of views referencing I_S plugin table. Skip storing, if the I_S name is already present in Update_context plugin names.

Parameters

thd	Thread ID
plugin	Reference to a plugin.
arg	Pointer to Context for I_S update.

Returns

false on success true when fails to store the metadata.

store_plugin_metadata()

static bool anonymous_namespace{metadata.cc}::store_plugin_metadata ( THD *  thd, plugin_ref  plugin, Update_context *  ctx  )

static

Helper method to store plugin IS table metadata into DD.

Skip storing, if the I_S name is already present in Update_context plugin names.

Parameters

thd	Thread ID
plugin	Reference to a plugin.
ctx	Pointer to Context for I_S update.

Return values

false	on success
true	when fails to store the metadata.

update_plugins_I_S_metadata()

bool anonymous_namespace{metadata.cc}::update_plugins_I_S_metadata

(

THD *

thd

)

Iterate through dynamic I_S plugins, and store I_S table metadata into dictionary, during MySQL server startup.

These are plugins that are loaded using server command line options.

Does following,

• Remove I_S table metadata for plugins that are not loaded.
• Store I_S table metadata of plugins that are newly loaded.

Parameters

thd

Thread

Returns

false on success, otherwise true.

update_server_I_S_metadata()

bool anonymous_namespace{metadata.cc}::update_server_I_S_metadata

(

THD *

thd

)

Does following during server restart.

• If I_S version is not changed, do nothing.
• Else, remove all I_S metadata that belongs to server.
• Store new server I_S metadata.
• Recreate I_S system views, which will update old I_S metadata because we execute CREATE OR REPLACE VIEW.

Parameters

thd

Thread

Returns

false on success, otherwise true.

Variable Documentation

UNKNOWN_PLUGIN_VERSION

unsigned int anonymous_namespace{metadata.cc}::UNKNOWN_PLUGIN_VERSION = -1