KuduSchema Class Reference

A representation of a table's schema. More...

#include <schema.h>

Public Member Functions
	KuduSchema (const KuduSchema &other)
Status	Reset (const std::vector< KuduColumnSchema > &columns, int key_columns) WARN_UNUSED_RESULT
bool	Equals (const KuduSchema &other) const
bool	operator== (const KuduSchema &rhs) const
bool	operator!= (const KuduSchema &rhs) const
KuduColumnSchema	Column (size_t idx) const
bool	HasColumn (const std::string &col_name, KuduColumnSchema *col_schema) const
size_t	num_columns () const
void	GetPrimaryKeyColumnIndexes (std::vector< int > *indexes) const
int	GetAutoIncrementingColumnIndex () const
KuduPartialRow *	NewRow () const
std::string	ToString () const
Assign/copy the schema
KuduSchema &	operator= (const KuduSchema &other)
void	CopyFrom (const KuduSchema &other)

Static Public Member Functions
static const char *const	GetAutoIncrementingColumnName ()

Detailed Description

A representation of a table's schema.

Constructor & Destructor Documentation

KuduSchema()

kudu::client::KuduSchema::KuduSchema

(

const KuduSchema &

other

)

Create a KuduSchema object as a copy of the other one.

Parameters

[in]

other

The other KuduSchema object to use as a reference.

Member Function Documentation

Column()

KuduColumnSchema kudu::client::KuduSchema::Column

(

size_t

idx

)

const

Parameters

[in]

idx

Column index.

Returns

Schema for the specified column.

CopyFrom()

void kudu::client::KuduSchema::CopyFrom

(

const KuduSchema &

other

)

Parameters

[in]

other

The source KuduSchema object to use as a reference.

Equals()

bool kudu::client::KuduSchema::Equals

(

const KuduSchema &

other

)

const

Check whether the schema is identical to the other one.

Deprecated

use operator==(const KuduSchema&) instead

Parameters

[in]

other

The other KuduSchema object to compare with.

Returns

true iff this KuduSchema object is identical to the specified one.

GetAutoIncrementingColumnIndex()

int kudu::client::KuduSchema::GetAutoIncrementingColumnIndex

(

)

const

Get the index of the auto incrementing column within this Schema.

Attention

In current versions of Kudu, key column indexes will always be contiguous indexes starting with 0. The auto incrementing column is always the last key column. However, in future versions this assumption may not hold, so callers should not assume it is the case.

Returns

The index of the auto incrementing column. If the column does not exist the return value is -1.

GetAutoIncrementingColumnName()

const char *const kudu::client::KuduSchema::GetAutoIncrementingColumnName ( )

static

Utility function to return the actual name of the auto incrementing column.

Returns

The name of the auto incrementing column.

GetPrimaryKeyColumnIndexes()

void kudu::client::KuduSchema::GetPrimaryKeyColumnIndexes

(

std::vector< int > *

indexes

)

const

Get the indexes of the primary key columns within this Schema.

Attention

In current versions of Kudu, these will always be contiguous column indexes starting with 0. However, in future versions this assumption may not hold, so callers should not assume it is the case.

Parameters

[out]

indexes

The placeholder for the result.

HasColumn()

bool kudu::client::KuduSchema::HasColumn	(	const std::string &	col_name,
		KuduColumnSchema *	col_schema ) const

Parameters

[in]	col_name	Column name.
[out]	col_schema	If not null pointer, then the schema for the specified column.

Returns

true iff the specified column exists.

NewRow()

KuduPartialRow * kudu::client::KuduSchema::NewRow

(

)

const

Create a new row corresponding to this schema.

Note

The new row refers to this KuduSchema object, so it must be destroyed before the KuduSchema object to avoid dangling pointers.

Returns

A pointer to the newly created row. The caller takes ownership of the created row.

num_columns()

size_t kudu::client::KuduSchema::num_columns

(

)

const

Returns

The number of columns in the schema.

operator!=()

bool kudu::client::KuduSchema::operator!=

(

const KuduSchema &

rhs

)

const

Check whether the schema is not identical to the other one.

Parameters

[in]

rhs

KuduSchema object to compare this one with.

Returns

true iff this KuduSchema object is not identical to the specified one.

operator=()

KuduSchema & kudu::client::KuduSchema::operator=

(

const KuduSchema &

other

)

Parameters

[in]

other

The source KuduSchema object to use as a reference.

Returns

Copy of 'other'

operator==()

bool kudu::client::KuduSchema::operator==

(

const KuduSchema &

rhs

)

const

Check whether the schema is identical to the other one.

Parameters

[in]

rhs

KuduSchema object to compare this one with.

Returns

true iff this KuduSchema object is identical to the specified one.

Reset()

Status kudu::client::KuduSchema::Reset	(	const std::vector< KuduColumnSchema > &	columns,
		int	key_columns )

Deprecated

This method will be removed soon.

Todo

Remove KuduSchema::Reset().

Note

KuduSchema::Reset() is deprecated API. It does not support non-unique primary key and does not add auto incrementing column.

Parameters

[in]	columns	Per-column schema information.
[in]	key_columns	Number of key columns in the schema.

Returns

Operation result status.

ToString()

std::string kudu::client::KuduSchema::ToString

(

)

const

Stringify this KuduSchema.

Returns

A string describing this schema.

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

• include/kudu/client/schema.h