dd::Column_statistics Class Reference

#include <column_statistics.h>

Inheritance diagram for dd::Column_statistics:

Public Types
typedef Column_statistics_impl	Impl
typedef Column_statistics	Cache_partition
typedef tables::Column_statistics	DD_table
typedef Primary_id_key	Id_key
typedef Item_name_key	Name_key
typedef Void_key	Aux_key

Public Member Functions
bool	update_id_key (Id_key *key) const
bool	update_name_key (Name_key *key) const
bool	update_aux_key (Aux_key *) const
	~Column_statistics () override=default
virtual const String_type &	schema_name () const =0
virtual void	set_schema_name (const String_type &schema_name)=0
virtual const String_type &	table_name () const =0
virtual void	set_table_name (const String_type &table_name)=0
virtual const String_type &	column_name () const =0
virtual void	set_column_name (const String_type &column_name)=0
virtual const histograms::Histogram *	histogram () const =0
virtual void	set_histogram (const histograms::Histogram *histogram)=0
virtual void	serialize (Sdi_wcontext *wctx, Sdi_writer *w) const =0
	Converts *this into json. More...
virtual bool	deserialize (Sdi_rcontext *rctx, const RJ_Value &val)=0
	Re-establishes the state of *this by reading sdi information from the rapidjson DOM subobject provided. More...
String_type	create_name () const
void	create_mdl_key (MDL_key *key) const
virtual Column_statistics *	clone () const =0
virtual Column_statistics *	clone_dropped_object_placeholder () const =0
	Allocate a new object which can serve as a placeholder for the original object in the Dictionary_client's dropped registry. More...
Public Member Functions inherited from dd::Entity_object
virtual Object_id	id () const =0
	The unique dictionary object id. More...
virtual bool	is_persistent () const =0
	Is dictionary object persistent in dictionary tables ? More...
virtual const String_type &	name () const =0
virtual void	set_name (const String_type &name)=0
Public Member Functions inherited from dd::Weak_object
virtual void	debug_print (String_type &outb) const =0
	Weak_object ()=default
	Weak_object (const Weak_object &)=default
virtual	~Weak_object ()=default

Static Public Member Functions
static bool	update_id_key (Id_key *key, Object_id id)
static bool	update_name_key (Name_key *key, const String_type &name)
static String_type	create_name (const String_type &schema_name, const String_type &table_name, const String_type &column_name)
static void	create_mdl_key (const String_type &schema_name, const String_type &table_name, const String_type &column_name, MDL_key *key)

Protected Attributes
MEM_ROOT	m_mem_root
	MEM_ROOT on which the histogram data is allocated. More...

Member Typedef Documentation

Aux_key

typedef Void_key dd::Column_statistics::Aux_key

Cache_partition

typedef Column_statistics dd::Column_statistics::Cache_partition

DD_table

typedef tables::Column_statistics dd::Column_statistics::DD_table

Id_key

typedef Primary_id_key dd::Column_statistics::Id_key

Impl

typedef Column_statistics_impl dd::Column_statistics::Impl

Name_key

typedef Item_name_key dd::Column_statistics::Name_key

Constructor & Destructor Documentation

~Column_statistics()

dd::Column_statistics::~Column_statistics ( )

overridedefault

Member Function Documentation

clone()

virtual Column_statistics * dd::Column_statistics::clone ( ) const

pure virtual

Implemented in dd::Column_statistics_impl.

clone_dropped_object_placeholder()

virtual Column_statistics * dd::Column_statistics::clone_dropped_object_placeholder ( ) const

pure virtual

Allocate a new object which can serve as a placeholder for the original object in the Dictionary_client's dropped registry.

Such object has the same keys as the original but has no other info and as result occupies less memory.

Implemented in dd::Column_statistics_impl.

column_name()

virtual const String_type & dd::Column_statistics::column_name ( ) const

pure virtual

Implemented in dd::Column_statistics_impl.

create_mdl_key() [1/2]

void dd::Column_statistics::create_mdl_key ( const String_type &  schema_name, const String_type &  table_name, const String_type &  column_name, MDL_key *  key  )

static

create_mdl_key() [2/2]

void dd::Column_statistics::create_mdl_key ( MDL_key *  key ) const

inline

create_name() [1/2]

String_type dd::Column_statistics::create_name ( ) const

inline

create_name() [2/2]

String_type dd::Column_statistics::create_name ( const String_type &  schema_name, const String_type &  table_name, const String_type &  column_name  )

static

deserialize()

virtual bool dd::Column_statistics::deserialize ( Sdi_rcontext *  rctx, const RJ_Value &  val  )

pure virtual

Re-establishes the state of *this by reading sdi information from the rapidjson DOM subobject provided.

Cross-references encountered within this object are tracked in sdictx, so that they can be updated when the entire object graph has been established.

Parameters

rctx	stores book-keeping information for the deserialization process
val	subobject of rapidjson DOM containing json representation of this object

Implemented in dd::Column_statistics_impl.

histogram()

virtual const histograms::Histogram * dd::Column_statistics::histogram ( ) const

pure virtual

Implemented in dd::Column_statistics_impl.

schema_name()

virtual const String_type & dd::Column_statistics::schema_name ( ) const

pure virtual

Implemented in dd::Column_statistics_impl.

serialize()

virtual void dd::Column_statistics::serialize ( Sdi_wcontext *  wctx, Sdi_writer *  w  ) const

pure virtual

Converts *this into json.

Converts all member variables that are to be included in the sdi into json by transforming them appropriately and passing them to the rapidjson writer provided.

Parameters

wctx	opaque context for data needed by serialization
w	rapidjson writer which will perform conversion to json

Implemented in dd::Column_statistics_impl.

set_column_name()

virtual void dd::Column_statistics::set_column_name ( const String_type &  column_name )

pure virtual

Implemented in dd::Column_statistics_impl.

set_histogram()

virtual void dd::Column_statistics::set_histogram ( const histograms::Histogram *  histogram )

pure virtual

Implemented in dd::Column_statistics_impl.

set_schema_name()

virtual void dd::Column_statistics::set_schema_name ( const String_type &  schema_name )

pure virtual

Implemented in dd::Column_statistics_impl.

set_table_name()

virtual void dd::Column_statistics::set_table_name ( const String_type &  table_name )

pure virtual

Implemented in dd::Column_statistics_impl.

table_name()

virtual const String_type & dd::Column_statistics::table_name ( ) const

pure virtual

Implemented in dd::Column_statistics_impl.

update_aux_key()

bool dd::Column_statistics::update_aux_key ( Aux_key *  ) const

inline

update_id_key() [1/2]

bool dd::Column_statistics::update_id_key ( Id_key *  key ) const

inline

update_id_key() [2/2]

bool dd::Column_statistics::update_id_key ( Id_key *  key, Object_id  id  )

static

update_name_key() [1/2]

bool dd::Column_statistics::update_name_key ( Name_key *  key ) const

inline

update_name_key() [2/2]

bool dd::Column_statistics::update_name_key ( Name_key *  key, const String_type &  name  )

static

Member Data Documentation

m_mem_root

MEM_ROOT dd::Column_statistics::m_mem_root

protected

MEM_ROOT on which the histogram data is allocated.

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The documentation for this class was generated from the following files:

• sql/dd/types/column_statistics.h
• sql/dd/impl/types/column_statistics_impl.cc