Main interface class to a read/write table. More...

#include <Table.h>

Inheritance diagram for casa::Table:

Public Types
enum	TableOption { Old, New, NewNoReplace, Scratch, Update, Delete }
	Define the possible options how a table can be opened. More...
enum	TableType { Plain, Memory }
	Define the possible table types. More...
enum	EndianFormat { BigEndian, LittleEndian, LocalEndian, AipsrcEndian }
	Define the possible endian formats in which table data can be stored. More...
typedef void	ScratchCallback (const String &name, Bool isScratch, const String &oldName)
	Define the signature of the function being called when the state of a scratch table changes (i.e.
Public Member Functions
	Table ()
	Create a null Table object (i.e.
	Table (const String &tableName, TableOption=Table::Old, const TSMOption &=TSMOption())
	Create a table object for an existing table.
	Table (const String &tableName, const TableLock &lockOptions, TableOption=Table::Old, const TSMOption &=TSMOption())
	Table (const String &tableName, const String &tableDescName, TableOption=Table::Old, const TSMOption &=TSMOption())
	Table (const String &tableName, const String &tableDescName, const TableLock &lockOptions, TableOption=Table::Old, const TSMOption &=TSMOption())
	Table (TableType, EndianFormat=Table::AipsrcEndian, const TSMOption &=TSMOption())
	Make a new empty table (plain (scratch) or memory type).
	Table (SetupNewTable &, uInt nrrow=0, Bool initialize=False, EndianFormat=Table::AipsrcEndian, const TSMOption &=TSMOption())
	Make a table object for a new table, which can thereafter be used for reading and writing.
	Table (SetupNewTable &, TableType, uInt nrrow=0, Bool initialize=False, EndianFormat=Table::AipsrcEndian, const TSMOption &=TSMOption())
	Table (SetupNewTable &, TableType, const TableLock &lockOptions, uInt nrrow=0, Bool initialize=False, EndianFormat=Table::AipsrcEndian, const TSMOption &=TSMOption())
	Table (SetupNewTable &, TableLock::LockOption, uInt nrrow=0, Bool initialize=False, EndianFormat=Table::AipsrcEndian, const TSMOption &=TSMOption())
	Table (SetupNewTable &, const TableLock &lockOptions, uInt nrrow=0, Bool initialize=False, EndianFormat=Table::AipsrcEndian, const TSMOption &=TSMOption())
	Table (const Block< Table > &tables, const Block< String > &subTables=Block< String >(), const String &subDirName=String())
	Create a table object as the virtual concatenation of one or more of existing tables.
	Table (const Block< String > &tableNames, const Block< String > &subTables=Block< String >(), TableOption=Table::Old, const TSMOption &=TSMOption(), const String &subDirName=String())
	Table (const Block< String > &tableNames, const Block< String > &subTables, const TableLock &lockOptions, TableOption=Table::Old, const TSMOption &=TSMOption())
	Table (const Table &)
	Copy constructor (reference semantics).
	~Table ()
	The destructor flushes (i.e.
Table &	operator= (const Table &)
	Assignment (reference semantics).
Block< String >	getPartNames (Bool recursive=False) const
	Get the names of the tables this table consists of.
Bool	isSameRoot (const Table &other) const
	Is the root table of this table the same as that of the other one?
void	closeSubTables () const
	Close all open subtables.
void	reopenRW ()
	Try to reopen the table for read/write access.
Table::EndianFormat	endianFormat () const
	Get the endian format in which the table is stored.
Bool	isMultiUsed (Bool checkSubTables=False) const
	Is the table used (i.e.
const TableLock &	lockOptions () const
	Get the locking options.
Bool	hasLock (FileLocker::LockType=FileLocker::Write) const
	Has this process the read or write lock, thus can the table be read or written safely?
Bool	hasLock (Bool write) const
Bool	lock (FileLocker::LockType=FileLocker::Write, uInt nattempts=0)
	Try to lock the table for read or write access (default is write).
Bool	lock (Bool write, uInt nattempts=0)
void	unlock ()
	Unlock the table.
Bool	hasDataChanged ()
	Determine if column or keyword table data have changed (or is being changed) since the last time this function was called.
void	flush (Bool fsync=False, Bool recursive=False)
	Flush the table, i.e.
void	resync ()
	Resynchronize the Table object with the table file.
Bool	isNull () const
	Test if the object is null, i.e.
void	throwIfNull () const
	Throw an exception if the object is null, i.e.
void	showStructure (std::ostream &, Bool showDataMans=True, Bool showColumns=True, Bool showSubTables=False, Bool sortColumns=False) const
	Show the structure of the table.
Bool	isRootTable () const
	Test if this table is the root table (ie.
Bool	isWritable () const
	Test if this table is opened as writable.
Bool	isColumnWritable (const String &columnName) const
	Test if the given column is writable.
Bool	isColumnWritable (uInt columnIndex) const
Bool	isColumnStored (const String &columnName) const
	Test if the given column is stored (otherwise it is virtual).
Bool	isColumnStored (uInt columnIndex) const
const TableRecord &	keywordSet () const
	Get readonly access to the table keyword set.
TableRecord &	rwKeywordSet ()
	Get read/write access to the table keyword set.
const TableInfo &	tableInfo () const
	Get access to the TableInfo object.
TableInfo &	tableInfo ()
void	flushTableInfo () const
	Write the TableInfo object.
const TableDesc &	tableDesc () const
	Get the table description.
TableDesc	actualTableDesc () const
Record	dataManagerInfo () const
	Return all data managers used and the columns served by them.
const String &	tableName () const
	Get the table name.
void	rename (const String &newName, TableOption)
	Rename the table and all its subtables.
void	copy (const String &newName, TableOption, Bool noRows=False) const
	Copy the table and all its subtables.
void	deepCopy (const String &newName, TableOption, Bool valueCopy=False, EndianFormat=AipsrcEndian, Bool noRows=False) const
void	deepCopy (const String &newName, const Record &dataManagerInfo, TableOption, Bool valueCopy=False, EndianFormat=AipsrcEndian, Bool noRows=False) const
Table	copyToMemoryTable (const String &name, Bool noRows=False) const
	Make a copy of a table to a MemoryTable object.
TableType	tableType () const
	Get the table type.
int	tableOption () const
	Get the table option.
void	markForDelete ()
	Mark the table for delete.
void	unmarkForDelete ()
	Unmark the table for delete.
Bool	isMarkedForDelete () const
	Test if the table is marked for delete.
uInt	nrow () const
	Get the number of rows.
Bool	canAddRow () const
	Test if it is possible to add a row to this table.
void	addRow (uInt nrrow=1, Bool initialize=False)
	Add one or more rows at the end of the table.
Bool	canRemoveRow () const
	Test if it is possible to remove a row from this table.
void	removeRow (uInt rownr)
	Remove the given row(s).
void	removeRow (const Vector< uInt > &rownrs)
TableExprNode	nodeRownr (uInt origin=0) const
	Create a TableExprNode object for the rownumber function.
TableExprNode	nodeRandom () const
	Create a TableExprNode object for the rand function.
Table	operator() (const TableExprNode &, uInt maxRow=0) const
	Select rows from a table using an select expression consisting of TableExprNode objects.
Table	operator() (const Vector< uInt > &rownrs) const
	Select rows using a vector of row numbers.
Table	operator() (const Block< Bool > &mask) const
	Select rows using a mask block.
Table	project (const Block< String > &columnNames) const
	Project the given columns (i.e.
Table	operator& (const Table &) const
	Do logical operations on a table.
Table	operator\| (const Table &) const
	Union with another table.
Table	operator- (const Table &) const
	Subtract another table.
Table	operator^ (const Table &) const
	Xor with another table.
Table	operator! () const
	Take complement.
Table	sort (const String &columnName, int=Sort::Ascending, int=Sort::HeapSort) const
	Sort a table on one or more columns of scalars.
Table	sort (const Block< String > &columnNames, int=Sort::Ascending, int=Sort::HeapSort) const
	Sort on multiple columns.
Table	sort (const Block< String > &columnNames, const Block< Int > &sortOrders, int=Sort::HeapSort) const
	Sort on multiple columns.
Table	sort (const Block< String > &columnNames, const Block< CountedPtr< BaseCompare > > &compareObjects, const Block< Int > &sortOrders, int=Sort::HeapSort) const
	Sort on multiple columns.
Vector< uInt >	rowNumbers () const
	Get a vector of row numbers in the root table of rows in this table.
Vector< uInt >	rowNumbers (const Table &that, Bool tryFast=False) const
	Get a vector of row numbers in that table of rows in this table.
void	addColumn (const ColumnDesc &columnDesc, Bool addToParent=True)
	Add a column to the table.
void	addColumn (const ColumnDesc &columnDesc, const String &dataManager, Bool byName, Bool addToParent=True)
	Use an existing data manager with the given name or type.
void	addColumn (const ColumnDesc &columnDesc, const DataManager &dataManager, Bool addToParent=True)
	Use the given data manager (which is a new one).
void	addColumn (const TableDesc &tableDesc, const DataManager &dataManager, Bool addToParent=True)
	Add a bunch of columns using the given new data manager.
void	addColumn (const TableDesc &tableDesc, const Record &dataManagerInfo, Bool addToParent=True)
Bool	canRemoveColumn (const String &columnName) const
	Test if columns can be removed.
Bool	canRemoveColumn (const Vector< String > &columnNames) const
void	removeColumn (const String &columnName)
	Remove columns.
void	removeColumn (const Vector< String > &columnName)
Bool	canRenameColumn (const String &columnName) const
	Test if a column can be renamed.
void	renameColumn (const String &newName, const String &oldName)
	Rename a column.
void	renameHypercolumn (const String &newName, const String &oldName)
void	getTableKeyword (AipsIO &, Bool openWritable)
	Read a table from AipsIO (for `TableKeywords`).
DataManager *	findDataManager (const String &name, Bool byColumn=False) const
	Find the data manager with the given name or for the given column name.

TableExprNode	key (const String &keywordName) const
	Create a TableExprNode object for a column or for a keyword in the table keyword set.
TableExprNode	key (const Vector< String > &fieldNames) const
TableExprNode	col (const String &columnName) const
TableExprNode	col (const String &columnName, const Vector< String > &fieldNames) const
TableExprNode	keyCol (const String &name, const Vector< String > &fieldNames) const
Static Public Member Functions
static ScratchCallback *	setScratchCallback (ScratchCallback *)
	Set the pointer to the ScratchCallback function.
static Table	openTable (const String &tableName, TableOption=Table::Old, const TSMOption &=TSMOption())
	Try to open a table.
static Table	openTable (const String &tableName, const TableLock &lockOptions, TableOption=Table::Old, const TSMOption &=TSMOption())
static Bool	canDeleteTable (const String &tableName, Bool checkSubTables=False)
	Can the table be deleted? If true, function deleteTable can safely be called.
static Bool	canDeleteTable (String &message, const String &tableName, Bool checkSubTables=False)
static void	deleteTable (const String &tableName, Bool checkSubTables=False)
	Delete the table.
static Bool	isOpened (const String &tableName)
	Is the table used (i.e.
static uInt	nAutoLocks ()
	Determine the number of locked tables opened with the AutoLock option (Locked table means locked for read and/or write).
static void	relinquishAutoLocks (Bool all=False)
	Unlock locked tables opened with the AutoLock option.
static Vector< String >	getLockedTables (FileLocker::LockType=FileLocker::Read, int lockOption=-1)
	Get the names of tables locked in this process.
static Bool	isNativeDataType (DataType dtype)
	Test if the given data type is native to the table system.
static String	fileName (const String &tableName)
	Make the table file name.
static Bool	isReadable (const String &tableName, bool throwIf=False)
	Test if a table with the given name exists and is readable.
static uInt	getLayout (TableDesc &desc, const String &tableName)
	Return the layout of a table (i.e.
static TableInfo	tableInfo (const String &tableName)
	Get the table info of the table with the given name.
static Bool	isWritable (const String &tableName, bool throwIf=False)
	Test if a table with the given name exists and is writable.
static Vector< String >	nonWritableFiles (const String &tableName)
	Find the non-writable files in a table.
Protected Member Functions
	Table (BaseTable *, Bool countIt=True)
	Construct a Table object from a BaseTable*.
void	open (const String &name, const String &type, int tableOption, const TableLock &lockOptions, const TSMOption &tsmOpt)
	Open an existing table.
Protected Attributes
BaseTable *	baseTabPtr_p
Bool	isCounted_p
uInt	lastModCounter_p
Static Protected Attributes
static ScratchCallback *	scratchCallback_p
Private Member Functions
BaseTable *	baseTablePtr () const
	Get the pointer to the underlying BaseTable.
BaseTable *	lookCache (const String &name, int tableOption, const TableLock &tableInfo)
	Look in the cache if the table is already open.
Bool	fastRowNumbers (const Vector< uInt > &v1, const Vector< uInt > &v2, Vector< uInt > &rows) const
	Try if v1 is a subset of v2 and fill rows with its indices in v2.
void	showColumnInfo (ostream &os, const TableDesc &, uInt maxNameLength, const Array< String > &columnNames, Bool sort) const
	Show the info of the given columns.
Static Private Member Functions
static BaseTable *	makeBaseTable (const String &name, const String &type, int tableOption, const TableLock &lockOptions, const TSMOption &tsmOpt, Bool addToCache, uInt locknr)
	Construct a BaseTable object from the table file.
Friends
class	TableColumn
class	BaseTable
class	PlainTable
class	MemoryTable
class	RefTable
class	ConcatTable
class	TableIterator
class	RODataManAccessor
class	TableExprNode
class	TableExprNodeRep
AipsIO &	operator<< (AipsIO &, const Table &)
	Write a table to AipsIO (for `TypedKeywords<Table>`).
AipsIO &	operator>> (AipsIO &, Table &)
	Read a table from AipsIO (for `TypedKeywords<Table>`).
ostream &	operator<< (ostream &, const Table &)
	Write a table to ostream (for `TypedKeywords<Table>`).

Detailed Description

Main interface class to a read/write table.

Intended use:

Public interface

Review Status

Reviewed By:: TPPR
Date Reviewed:: 08.11.94
Test programs:: tTable

Prerequisite

Synopsis

Class Table can be used to create a new table or to access an existing table in read/write or readonly mode.

To access the data in a Table, objects have to be created to access the columns. These objects are TableColumn, ScalarColumn<T> and ArrayColumn<T>, which can be created via their constructors. Furthermore the Table has a TableRecord object for holding keywords which can be read or written using the appropriate functions.

To open an existing table, a simple Table constructor can be used. The possible construct options are:

Old readonly table (default option)
Update update existing table
Delete delete table

The function openTable makes it possible to open a subtable of a table in a convenient way, even if the table is only a reference to another table (e.g., a selection).

Creating a new table requires more work, because columns have to be bound to storage managers or virtual column engines. Class SetupNewTable is needed for this purpose. The Tables module documentation explains in more detail how to create a table. When creating a table, it can be specified which endian format to use. By default it uses the format specified in the aipsrc variable table.endianformat which defaults to Table::LocalEndian (thus the endian format of the machine being used).

It is possible to create a Table object as the virtual concatenation of Tables having identical table descriptions. Subtables of those tables can optionally be concatenated as well. E.g. if a MeasurementSet is partioned in time, this mechanism makes it possible to view it as a single table. Furthermore, a subtable like SYSCAL can be concatenated as well, while the other subtables are identical in all partitions and are taken from the first table only.

Other Table objects can be created from a Table using the select, project and sort functions. The result in so-called reference tables. In this way a subset of a table can be created and can be read/written in the same way as a normal Table. Writing has the effect that the underlying table gets written.

Example

    // Open a table to be updated.
    Table myTable ("theTable", Table::Update);
    // Write the column containing the scalar RA.
    ScalarColumn<double> raColumn(myTable, "RA");
    uInt nrrow = myTable.nrow();
    for (uInt i=0; i<nrrow; i++) {
       raColumn.put (i, i+10);    // Put value i+10 into row i
    }

Motivation

Table is the envelope for the underlying counted referenced classes derived from BaseTable. In this way no pointers have to be used to get polymorphism.

To Do

add, remove, rename columns.
virtual concatenation of tables (if still necessary).
maybe an isAttached function.

Definition at line 149 of file Table.h.

Member Typedef Documentation

typedef void casa::Table::ScratchCallback(const String &name, Bool isScratch, const String &oldName)

Define the signature of the function being called when the state of a scratch table changes (i.e.

created, closed, renamed, (un)markForDelete).
- isScratch=True indicates that a scratch table is created (oldName is empty) or renamed (oldName is not empty).
- isScratch=False indicates that a scratch table with name name is not scratch anymore (because it is closed or because its state is set to non-scratch).

Definition at line 210 of file Table.h.

Member Enumeration Documentation

enum casa::Table::EndianFormat

Define the possible endian formats in which table data can be stored.

Enumerator:

BigEndian	store table data in big endian (e.g. SUN) format
LittleEndian	store table data in little endian (e.g. Intel) format
LocalEndian	store data in the endian format of the machine used
AipsrcEndian	use endian format defined in the aipsrc variable table.endianformat If undefined, it defaults to LocalEndian.

Definition at line 188 of file Table.h.

enum casa::Table::TableOption

Define the possible options how a table can be opened.

Enumerator:

Old	existing table
New	create table
NewNoReplace	create table (may not exist)
Scratch	new table, which gets marked for delete
Update	update existing table
Delete	delete table

Definition at line 164 of file Table.h.

enum casa::Table::TableType

Define the possible table types.

Enumerator:

Plain	plain table (stored on disk)
Memory	table held in memory

Definition at line 180 of file Table.h.

Constructor & Destructor Documentation

casa::Table::Table ( )

Create a null Table object (i.e.

a NullTable is attached). The sole purpose of this constructor is to allow construction of an array of Table objects. The assignment operator can be used to make a null object reference a proper table.

casa::Table::Table	(	const String &	tableName,
		TableOption	= `Table::Old`,
		const TSMOption &	= `TSMOption()`
	)		`[explicit]`

Create a table object for an existing table.

The only options allowed are Old, Update, and Delete. If the name of a table description is given, it is checked if the table has that description. Locking options can be given (see class TableLock . If the table with this name was already opened in this process, the existing and new locking options are merged using TableLock::merge. The default locking mechanism is DefaultLocking. If the table is not open yet, it comes to AutoLocking with an inspection interval of 5 seconds. Otherwise DefaultLocking keeps the locking options of the already open table.

casa::Table::Table	(	const String &	tableName,
		const TableLock &	lockOptions,
		TableOption	= `Table::Old`,
		const TSMOption &	= `TSMOption()`
	)

casa::Table::Table	(	const String &	tableName,
		const String &	tableDescName,
		TableOption	= `Table::Old`,
		const TSMOption &	= `TSMOption()`
	)

casa::Table::Table	(	const String &	tableName,
		const String &	tableDescName,
		const TableLock &	lockOptions,
		TableOption	= `Table::Old`,
		const TSMOption &	= `TSMOption()`
	)

casa::Table::Table	(	TableType	,
		EndianFormat	= `Table::AipsrcEndian`,
		const TSMOption &	= `TSMOption()`
	)		`[explicit]`

Make a new empty table (plain (scratch) or memory type).

Columns should be added to make it a real one. Note that the endian format is only relevant for plain tables.

casa::Table::Table	(	SetupNewTable &	,
		uInt	nrrow = `0`,
		Bool	initialize = `False`,
		EndianFormat	= `Table::AipsrcEndian`,
		const TSMOption &	= `TSMOption()`
	)		`[explicit]`

Make a table object for a new table, which can thereafter be used for reading and writing.

If there are unbound columns, default storage managers an/ord virtual column engines will be created and bound to those columns. Create the table with the given nr of rows. If a storage manager is used which does not allow addition of rows, the number of rows in the table must already be given here. Optionally the rows can be initialized with the default values as defined in the column descriptions. Locking options can be given (see class TableLock . The default locking mechanism is AutoLocking with a default inspection interval of 5 seconds.
The data will be stored in the given endian format.

casa::Table::Table	(	SetupNewTable &	,
		TableType	,
		uInt	nrrow = `0`,
		Bool	initialize = `False`,
		EndianFormat	= `Table::AipsrcEndian`,
		const TSMOption &	= `TSMOption()`
	)

casa::Table::Table	(	SetupNewTable &	,
		TableType	,
		const TableLock &	lockOptions,
		uInt	nrrow = `0`,
		Bool	initialize = `False`,
		EndianFormat	= `Table::AipsrcEndian`,
		const TSMOption &	= `TSMOption()`
	)

casa::Table::Table	(	SetupNewTable &	,
		TableLock::LockOption	,
		uInt	nrrow = `0`,
		Bool	initialize = `False`,
		EndianFormat	= `Table::AipsrcEndian`,
		const TSMOption &	= `TSMOption()`
	)

casa::Table::Table	(	SetupNewTable &	,
		const TableLock &	lockOptions,
		uInt	nrrow = `0`,
		Bool	initialize = `False`,
		EndianFormat	= `Table::AipsrcEndian`,
		const TSMOption &	= `TSMOption()`
	)

casa::Table::Table	(	const Block< Table > &	tables,
		const Block< String > &	subTables = `Block< String >()`,
		const String &	subDirName = `String()`
	)		`[explicit]`

Create a table object as the virtual concatenation of one or more of existing tables.

The descriptions of all those tables must be exactly the same.
The keywordset of the virtual table is the set of the first table including its subtables. However, it is possible to specify the names of the subtables that have to be concantenated as well.
In this way a concatenation of multiple MS-s can be made, where it can be specified that, say, the SYSCAL table has to be concatenated too.
When a concatenated table is written and if a non-empty subDirName is given, the tables to be concatenated will be moved to that subdirectory in the directory of the concatenated table. This option is mainly used by the MSS structure used in CASA.
The only open options allowed are Old and Update. Locking options can be given (see class TableLock . They apply to all underlying tables. If a table was already opened in this process, the existing and new locking options are merged using TableLock::merge. The default locking mechanism is DefaultLocking. If the table is not open yet, it comes to AutoLocking with an inspection interval of 5 seconds. Otherwise DefaultLocking keeps the locking options of the already open table.

casa::Table::Table	(	const Block< String > &	tableNames,
		const Block< String > &	subTables = `Block< String >()`,
		TableOption	= `Table::Old`,
		const TSMOption &	= `TSMOption()`,
		const String &	subDirName = `String()`
	)		`[explicit]`

casa::Table::Table	(	const Block< String > &	tableNames,
		const Block< String > &	subTables,
		const TableLock &	lockOptions,
		TableOption	= `Table::Old`,
		const TSMOption &	= `TSMOption()`
	)

casa::Table::Table ( const Table & )

Copy constructor (reference semantics).

casa::Table::~Table ( )

The destructor flushes (i.e.

writes) the table if it is opened for output and not marked for delete. It will flush if the destructor is called due to an exception, because the Table object may not be correct. Of course, in that case the flush function could be called explicitly.

casa::Table::Table	(	BaseTable *	,
		Bool	countIt = `True`
	)		`[protected]`

Construct a Table object from a BaseTable*.

By default the object gets counted.

Member Function Documentation

TableDesc casa::Table::actualTableDesc ( ) const

void casa::Table::addColumn	(	const ColumnDesc &	columnDesc,
		Bool	addToParent = `True`
	)		`[inline]`

Add a column to the table.

The data manager used for the column depend on the function used. Exceptions are thrown if the column already exist or if the table is not writable.
If this table is a reference table (result of selection) and if addToParent=True the column is also added to the parent table.

Use the first appropriate existing storage manager. If there is none, a data manager is created using the default data manager in the column description.

Definition at line 1179 of file Table.h.

References casa::BaseTable::addColumn(), and baseTabPtr_p.

void casa::Table::addColumn	(	const ColumnDesc &	columnDesc,
		const String &	dataManager,
		Bool	byName,
		Bool	addToParent = `True`
	)		`[inline]`

Use an existing data manager with the given name or type.

If the flag byName is True, a name is given, otherwise a type. If a name is given, an exception is thrown if the data manager is unknown or does not allow addition of columns. If a type is given, a storage manager of the given type will be created if there is no such data manager allowing addition of rows.

Definition at line 1181 of file Table.h.

References casa::BaseTable::addColumn(), and baseTabPtr_p.

void casa::Table::addColumn	(	const ColumnDesc &	columnDesc,
		const DataManager &	dataManager,
		Bool	addToParent = `True`
	)		`[inline]`

Use the given data manager (which is a new one).

Definition at line 1185 of file Table.h.

References casa::BaseTable::addColumn(), and baseTabPtr_p.

void casa::Table::addColumn	(	const TableDesc &	tableDesc,
		const DataManager &	dataManager,
		Bool	addToParent = `True`
	)		`[inline]`

Add a bunch of columns using the given new data manager.

All columns and possible hypercolumn definitions in the given table description will be copied and added to the table. This can be used in case of specific data managers which need to be created with more than one column (e.g. the tiled hypercube storage managers).
The data manager can be given directly or by means of a record describing the data manager in the standard way with the fields TYPE, NAME, and SPEC. The record can contain those fields itself or it can contain a single subrecord with those fields.
If this table is a reference table (result of selection) and if addToParent=True the columns are also added to the parent table.

Definition at line 1188 of file Table.h.

References casa::BaseTable::addColumn(), and baseTabPtr_p.

void casa::Table::addColumn	(	const TableDesc &	tableDesc,
		const Record &	dataManagerInfo,
		Bool	addToParent = `True`
	)		`[inline]`

Definition at line 1191 of file Table.h.

References casa::BaseTable::addColumns(), and baseTabPtr_p.

void casa::Table::addRow	(	uInt	nrrow = `1`,
		Bool	initialize = `False`
	)		`[inline]`

Add one or more rows at the end of the table.

This will fail for tables not supporting addition of rows. Optionally the rows can be initialized with the default values as defined in the column descriptions.

Definition at line 1173 of file Table.h.

References casa::BaseTable::addRow(), and baseTabPtr_p.

Referenced by casa::CalTable::addRowDesc(), casa::CalTable2::addRowDesc(), casa::CalTable::addRowHistory(), casa::CalTable2::addRowHistory(), casa::CalTable::addRowMain(), and casa::CalTable2::addRowMain().

BaseTable * casa::Table::baseTablePtr ( ) const [inline, private]

Get the pointer to the underlying BaseTable.

This is needed for some friend classes.

Definition at line 1141 of file Table.h.

References baseTabPtr_p.

Bool casa::Table::canAddRow ( ) const [inline]

Test if it is possible to add a row to this table.

It is possible if all storage managers used for the table support it.

Definition at line 1164 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::canAddRow().

static Bool casa::Table::canDeleteTable	(	const String &	tableName,
		Bool	checkSubTables = `False`
	)		`[static]`

Can the table be deleted? If true, function deleteTable can safely be called.

If not, message contains the reason why (e.g. 'table is not writable'). It checks if the table is writable, is not open in this process and is not open in another process.
If checkSubTables is set, it also checks if a subtable is not open in another process.

static Bool casa::Table::canDeleteTable	(	String &	message,
		const String &	tableName,
		Bool	checkSubTables = `False`
	)		`[static]`

Bool casa::Table::canRemoveColumn ( const String & columnName ) const

Test if columns can be removed.

It can if the columns exist and if the data manager it is using supports removal of columns or if all columns from a data manager would be removed..
You can always remove columns from a reference table.

Bool casa::Table::canRemoveColumn ( const Vector< String > & columnNames ) const [inline]

Definition at line 1168 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::canRemoveColumn().

Bool casa::Table::canRemoveRow ( ) const [inline]

Test if it is possible to remove a row from this table.

It is possible if all storage managers used for the table support it.

Definition at line 1166 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::canRemoveRow().

Bool casa::Table::canRenameColumn ( const String & columnName ) const [inline]

Test if a column can be renamed.

Definition at line 1170 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::canRenameColumn().

void casa::Table::closeSubTables ( ) const

Close all open subtables.

TableExprNode casa::Table::col ( const String & columnName ) const

Referenced by casa::MSSelectableTable::col().

TableExprNode casa::Table::col	(	const String &	columnName,
		const Vector< String > &	fieldNames
	)		const

void casa::Table::copy	(	const String &	newName,
		TableOption	,
		Bool	noRows = `False`
	)		const

Copy the table and all its subtables.

Especially for RefTables copy and deepCopy behave differently. copy makes a bitwise copy of the table, thus the result is still a RefTable. On the other hand deepCopy makes a physical copy of all referenced table rows and columns, thus the result is a PlainTable.
For PlainTables deepCopy is the same as copy unless valueCopy==True is given. In that case the values are copied which takes longer, but reorganizes the data files to get rid of gaps in the data. Also if specific DataManager info is given or if no rows have to be copied, a deep copy is made.
The following options can be given:

Table::New: If a table with this name exists, it will be overwritten.
Table::NewNoReplace: If a table with this name already exists, an exception is thrown.
Table::Scratch: Same as Table::New, but followed by markForDelete().

The new table gets the given endian format. Note that the endian option is only used if a true deep copy of a table is made.
When making a deep copy, it is possible to specify the data managers using the dataManagerInfo argument. See getDataManagerInfo for more info about that record.
If noRows=True no rows are copied. Also no rows are copied in all subtables. It is useful if one wants to make a copy of only the Table structure.

Table casa::Table::copyToMemoryTable	(	const String &	name,
		Bool	noRows = `False`
	)		const

Make a copy of a table to a MemoryTable object.

Use the given name for the memory table.

Record casa::Table::dataManagerInfo ( ) const

Return all data managers used and the columns served by them.

The info is returned in a record. It contains a subrecord per data manager. Each subrecord contains the following fields:

TYPE: a string giving the type of the data manager.
NAME: a string giving the name of the data manager.
COLUMNS: a vector of strings giving the columns served by the data manager.

Data managers may return some additional fields (e.g. BUCKETSIZE).

void casa::Table::deepCopy	(	const String &	newName,
		TableOption	,
		Bool	valueCopy = `False`,
		EndianFormat	= `AipsrcEndian`,
		Bool	noRows = `False`
	)		const

void casa::Table::deepCopy	(	const String &	newName,
		const Record &	dataManagerInfo,
		TableOption	option,
		Bool	valueCopy = `False`,
		EndianFormat	endianFormat = `AipsrcEndian`,
		Bool	noRows = `False`
	)		const `[inline]`

Definition at line 1124 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::deepCopy().

static void casa::Table::deleteTable	(	const String &	tableName,
		Bool	checkSubTables = `False`
	)		`[static]`

Delete the table.

An exception is thrown if the table cannot be deleted because its is not writable or because it is still open in this or another process.
If checkSubTables is set, it is also checked if a subtable is used in another process.

Table::EndianFormat casa::Table::endianFormat ( ) const

Get the endian format in which the table is stored.

Bool casa::Table::fastRowNumbers	(	const Vector< uInt > &	v1,
		const Vector< uInt > &	v2,
		Vector< uInt > &	rows
	)		const `[private]`

Try if v1 is a subset of v2 and fill rows with its indices in v2.

Return False if not a proper subset.

static String casa::Table::fileName ( const String & tableName ) [static]

Make the table file name.

DataManager * casa::Table::findDataManager	(	const String &	name,
		Bool	byColumn = `False`
	)		const `[inline]`

Find the data manager with the given name or for the given column name.

Definition at line 1200 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::findDataManager().

void casa::Table::flush	(	Bool	fsync = `False`,
		Bool	recursive = `False`
	)		`[inline]`

Flush the table, i.e.

write out the buffers. If sync=True, it is ensured that all data are physically written to disk. Nothing will be done if the table is not writable. At any time a flush can be executed, even if the table is marked for delete. If the table is marked for delete, the destructor will remove files written by intermediate flushes. Note that if necessary the destructor will do an implicit flush, unless it is executed due to an exception.
If fsync=True the file contents are fsync-ed to disk, thus ensured that the system buffers are actually written to disk.
If recursive=True all subtables are flushed too.

Definition at line 1082 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::flush().

Referenced by casa::TempLatticeImpl< typename NumericTraits< T >::ConjugateType >::flush().

void casa::Table::flushTableInfo ( ) const [inline]

Write the TableInfo object.

Usually this is not necessary, because it is done automatically when the table gets written (by table destructor or flush function). This function is only useful if the table info has to be written before the table gets written (e.g. when another process reads the table while it gets filled).

Definition at line 1154 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::flushTableInfo().

static uInt casa::Table::getLayout	(	TableDesc &	desc,
		const String &	tableName
	)		`[static]`

Return the layout of a table (i.e.

description and #rows). This function has the advantage that only the minimal amount of information required is read from the table, thus it is much faster than a normal table open.
The number of rows is returned. The description of the table is stored in desc (its contents will be overwritten).
An exception is thrown if the table does not exist.

static Vector<String> casa::Table::getLockedTables	(	FileLocker::LockType	= `FileLocker::Read`,
		int	lockOption = `-1`
	)		`[static]`

Get the names of tables locked in this process.

By default all locked tables are given (note that a write lock implies a read lock), but it is possible to select on lock type FileLocker::Write and on option (TableLock::AutoLocking, TableLock::ReadLocking, or TableLock::PermanentLocking).

Block<String> casa::Table::getPartNames ( Bool recursive = False ) const

Get the names of the tables this table consists of.

For a plain table it returns its name, for a RefTable the name of the parent, and for a ConcatTable the names of all its parts.
Note that a part can be any type of table (e.g. a ConcatTable). The recursive switch tells how to deal with that.

void casa::Table::getTableKeyword	(	AipsIO &	,
		Bool	openWritable
	)

Read a table from AipsIO (for TableKeywords).

This will read the table name and open the table as writable if the switch is set and if the table file is writable. otherwise it is opened as readonly.

Bool casa::Table::hasDataChanged ( )

Determine if column or keyword table data have changed (or is being changed) since the last time this function was called.

Bool casa::Table::hasLock ( FileLocker::LockType type = FileLocker::Write ) const [inline]

Has this process the read or write lock, thus can the table be read or written safely?

Definition at line 1100 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::hasLock().

Referenced by casa::TableLocker::hasLock().

Bool casa::Table::hasLock ( Bool write ) const [inline]

Definition at line 1102 of file Table.h.

References baseTabPtr_p, casa::BaseTable::hasLock(), casa::FileLocker::Read, and casa::FileLocker::Write.

Bool casa::Table::isColumnStored ( const String & columnName ) const [inline]

Test if the given column is stored (otherwise it is virtual).

Definition at line 1117 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::isColumnStored().

Bool casa::Table::isColumnStored ( uInt columnIndex ) const [inline]

Definition at line 1119 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::isColumnStored().

Bool casa::Table::isColumnWritable ( const String & columnName ) const [inline]

Test if the given column is writable.

Definition at line 1112 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::isColumnWritable().

Bool casa::Table::isColumnWritable ( uInt columnIndex ) const [inline]

Definition at line 1114 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::isColumnWritable().

Bool casa::Table::isMarkedForDelete ( ) const [inline]

Test if the table is marked for delete.

Definition at line 1136 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::isMarkedForDelete().

Bool casa::Table::isMultiUsed ( Bool checkSubTables = False ) const [inline]

Is the table used (i.e.

open) in another process. If checkSubTables is set, it is also checked if a subtable is used in another process.

Definition at line 1087 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::isMultiUsed().

static Bool casa::Table::isNativeDataType ( DataType dtype ) [static]

Test if the given data type is native to the table system.

   If not, a virtual column engine is needed to store data with that type.
   With the function DataType::whatType it can be used in a templated
   function like:

            if (Table::isNativeDataType (whatType(static_cast<T*>(0)))) {

Bool casa::Table::isNull ( ) const [inline]

Test if the object is null, i.e.

does not reference a proper table. This is the case if the default constructor is used.

Definition at line 498 of file Table.h.

References baseTabPtr_p, casa::BaseTable::isNull(), and casa::True.

Referenced by casa::MSTableIndex::isNull(), and casa::MSTable< MSPointingEnums::PredefinedColumns, MSPointingEnums::PredefinedKeywords >::validate().

static Bool casa::Table::isOpened ( const String & tableName ) [static]

Is the table used (i.e.

open) in this process.

static Bool casa::Table::isReadable	(	const String &	tableName,
		bool	throwIf = `False`
	)		`[static]`

Test if a table with the given name exists and is readable.

If not, an exception is thrown if throwIf==True.

Bool casa::Table::isRootTable ( ) const [inline]

Test if this table is the root table (ie.

if it is not the subset of another table).

Definition at line 1107 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::root().

Bool casa::Table::isSameRoot ( const Table & other ) const [inline]

Is the root table of this table the same as that of the other one?

Definition at line 1077 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::root().

static Bool casa::Table::isWritable	(	const String &	tableName,
		bool	throwIf = `False`
	)		`[static]`

Test if a table with the given name exists and is writable.

Bool casa::Table::isWritable ( ) const [inline]

Test if this table is opened as writable.

Definition at line 1110 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::isWritable().

TableExprNode casa::Table::key ( const String & keywordName ) const

Create a TableExprNode object for a column or for a keyword in the table keyword set.

   This can be used in selecting rows from a table using
   <tt>operator()</tt> described below.
   <br>The functions taking the fieldNames vector are meant for
   the cases where the keyword or column contains records.
   The fieldNames indicate which field to take from that record
   (which can be a record again, etc.).

TableExprNode casa::Table::key ( const Vector< String > & fieldNames ) const

TableExprNode casa::Table::keyCol	(	const String &	name,
		const Vector< String > &	fieldNames
	)		const

const TableRecord & casa::Table::keywordSet ( ) const [inline]

Get readonly access to the table keyword set.

If UserLocking is used, it will automatically acquire and release a read lock if the table is not locked.

Definition at line 1145 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::keywordSet().

Bool casa::Table::lock	(	FileLocker::LockType	type = `FileLocker::Write`,
		uInt	nattempts = `0`
	)		`[inline]`

Try to lock the table for read or write access (default is write).

The number of attempts (default = forever) can be specified when acquiring the lock does not succeed immediately. If nattempts>1, the system waits 1 second between each attempt, so nattempts is more or less equal to a wait period in seconds. The return value is false if acquiring the lock failed. If PermanentLocking is in effect, a lock is already present, so nothing will be done.

Definition at line 1091 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::lock().

Referenced by casa::VisSet::lock().

Bool casa::Table::lock	(	Bool	write,
		uInt	nattempts = `0`
	)		`[inline]`

Definition at line 1093 of file Table.h.

References baseTabPtr_p, casa::BaseTable::lock(), casa::FileLocker::Read, and casa::FileLocker::Write.

const TableLock & casa::Table::lockOptions ( ) const [inline]

Get the locking options.

Definition at line 1089 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::lockOptions().

BaseTable* casa::Table::lookCache	(	const String &	name,
		int	tableOption,
		const TableLock &	tableInfo
	)		`[private]`

Look in the cache if the table is already open.

If so, check if table option matches. If needed reopen the table for read/write and merge the lock options.

static BaseTable* casa::Table::makeBaseTable	(	const String &	name,
		const String &	type,
		int	tableOption,
		const TableLock &	lockOptions,
		const TSMOption &	tsmOpt,
		Bool	addToCache,
		uInt	locknr
	)		`[static, private]`

Construct a BaseTable object from the table file.

void casa::Table::markForDelete ( ) [inline]

Mark the table for delete.

This means that the underlying table gets deleted when it is actually destructed. The scratchCallback function is called when needed.

Definition at line 1132 of file Table.h.

References baseTabPtr_p, casa::BaseTable::markForDelete(), and casa::True.

static uInt casa::Table::nAutoLocks ( ) [static]

Determine the number of locked tables opened with the AutoLock option (Locked table means locked for read and/or write).

TableExprNode casa::Table::nodeRandom ( ) const

Create a TableExprNode object for the rand function.

TableExprNode casa::Table::nodeRownr ( uInt origin = 0 ) const

Create a TableExprNode object for the rownumber function.

'origin' Indicates which rownumber is the first. C++ uses origin = 0 (default) Glish and TaQL both use origin = 1

static Vector<String> casa::Table::nonWritableFiles ( const String & tableName ) [static]

Find the non-writable files in a table.

uInt casa::Table::nrow ( ) const [inline]

Get the number of rows.

It is unsynchronized meaning that it will not check if another process updated the table, thus possible increased the number of rows. If one wants to take that into account, he should acquire a read-lock (using the lock function) before using nrow().

Definition at line 1139 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::nrow().

Referenced by casa::MSValidIds::checkResult(), casa::MSValidIds::checkRow(), casa::TableCopy::copyRows(), casa::Partition::n_bytes(), casa::SubMS::n_bytes(), casa::ROCTIter::nrow(), casa::MSSelector::nrow(), casa::VisibilityIteratorReadImpl::nRowChunk(), and casa::TableIterator::pastEnd().

void casa::Table::open	(	const String &	name,
		const String &	type,
		int	tableOption,
		const TableLock &	lockOptions,
		const TSMOption &	tsmOpt
	)		`[protected]`

Open an existing table.

static Table casa::Table::openTable	(	const String &	tableName,
		TableOption	= `Table::Old`,
		const TSMOption &	= `TSMOption()`
	)		`[static]`

Try to open a table.

The name of the table can contain subtable names using :: as separator. In this way it is possible to directly open a subtable of a RefTable or ConcatTable, which is not possible if the table name is specified with slashes.
The open process is as follows:

It is tried to open the table with the given name.
If unsuccessful, the name is split into its parts using :: The first part is the main table which will be opened temporarily. The other parts are the successive subtable names (usually one). Each subtable is opened by looking it up in the keywords of the table above. The final subtable is returned.

An exception is thrown if the table cannot be opened.

Example

Open the ANTENNA subtable of an MS which might be a selection of a real MS.

        Table tab(Table::openTable ("sel.ms::ANTENNA");

static Table casa::Table::openTable	(	const String &	tableName,
		const TableLock &	lockOptions,
		TableOption	= `Table::Old`,
		const TSMOption &	= `TSMOption()`
	)		`[static]`

Table casa::Table::operator! ( ) const

Take complement.

Table casa::Table::operator& ( const Table & ) const

Do logical operations on a table.

It can be used for row-selected or projected (i.e. column-selected) tables. The tables involved must come from the same root table or be the root table themselves.

Intersection with another table.

Table casa::Table::operator()	(	const TableExprNode &	,
		uInt	maxRow = `0`
	)		const

Select rows from a table using an select expression consisting of TableExprNode objects.

   Basic TableExprNode objects can be created with the functions
     \ref Table_keycol "key"  and especially
     \ref Table_keycol "col" .
   Composite TableExprNode objects, representing an expression,
   can be created by applying operations (like == and +)
   to the basic ones. This is described in class
     \link casa::TableExprNode TableExprNode \endlink .
   For example:

           Table result = tab(tab.col("columnName") > 10);

All rows for which the expression is true, will be selected and "stored" in the result. You need to include ExprNode.h for this purpose.
If maxRow>0, the selection process will stop when maxRow matching rows are found.
The TableExprNode argument can be empty (null) meaning that only the maxRow argument is taken into account.

Table casa::Table::operator() ( const Vector< uInt > & rownrs ) const

Select rows using a vector of row numbers.

   This can, for instance, be used to select the same rows as
   were selected in another table (using the rowNumbers function).

            Table result = thisTable (otherTable.rowNumbers());

Table casa::Table::operator() ( const Block< Bool > & mask ) const

Select rows using a mask block.

The length of the block must match the number of rows in the table. If an element in the mask is True, the corresponding row will be selected.

Table casa::Table::operator- ( const Table & ) const

Subtract another table.

Table& casa::Table::operator= ( const Table & )

Assignment (reference semantics).

Table casa::Table::operator^ ( const Table & ) const

Xor with another table.

Table casa::Table::operator| ( const Table & ) const

Union with another table.

Table casa::Table::project ( const Block< String > & columnNames ) const

Project the given columns (i.e.

select the columns).

static void casa::Table::relinquishAutoLocks ( Bool all = False ) [static]

Unlock locked tables opened with the AutoLock option.

If all=True all such tables will be unlocked. If all=False only tables requested by another process will be unlocked.

void casa::Table::removeColumn ( const String & columnName )

Remove columns.

When removing columns from a reference table, the columns are NOT removed from the underlying table.

void casa::Table::removeColumn ( const Vector< String > & columnName ) [inline]

Definition at line 1193 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::removeColumn().

void casa::Table::removeRow ( uInt rownr ) [inline]

Remove the given row(s).

   The latter form can be useful with the select and rowNumbers functions
   to remove some selected rows from the table.
   <br>It will fail for tables not supporting removal of rows.
   <br><strong>Warning:</strong><em> 
   The following code fragments do NOT have the same result:

           tab;removeRow (10);      // remove row 10
           tab;removeRow (20);      // remove row 20, which was 21
           Vector<uInt> vec(2);
           vec(0) = 10;
           vec(1) = 20;
           tab;removeRow (vec);     // remove row 10 and 20

because in the first fragment removing row 10 turns the former row 21 into row 20;

Definition at line 1175 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::removeRow().

void casa::Table::removeRow ( const Vector< uInt > & rownrs ) [inline]

Definition at line 1177 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::removeRow().

void casa::Table::rename	(	const String &	newName,
		TableOption	option
	)		`[inline]`

Rename the table and all its subtables.

The following options can be given:

Table::Update: A table with this name must already exists, which will be overwritten. When succesfully renamed, the table is unmarked for delete (if necessary).
Table::New: If a table with this name exists, it will be overwritten. When succesfully renamed, the table is unmarked for delete (if necessary).
Table::NewNoReplace: If a table with this name already exists, an exception is thrown. When succesfully renamed, the table is unmarked for delete (if necessary).
Table::Scratch: Same as Table::New, but followed by markForDelete().

The scratchCallback function is called when needed.

Definition at line 1122 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::rename().

void casa::Table::renameColumn	(	const String &	newName,
		const String &	oldName
	)		`[inline]`

Rename a column.

An exception is thrown if the old name does not exist or if the name already exists.
Caution: Renaming a column should be done with care, because other columns may be referring this column; Also a hypercolumn definition might be using the old name; Finally if may also invalidate persistent selections of a table, because the reference table cannot find the column anymore;

Definition at line 1195 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::renameColumn().

void casa::Table::renameHypercolumn	(	const String &	newName,
		const String &	oldName
	)		`[inline]`

Definition at line 1197 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::renameHypercolumn().

void casa::Table::reopenRW ( ) [inline]

Try to reopen the table for read/write access.

An exception is thrown if the table is not writable. Nothing is done if the table is already open for read/write.

Definition at line 1080 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::reopenRW().

void casa::Table::resync ( ) [inline]

Resynchronize the Table object with the table file.

This function is only useful if no read-locking is used, ie. if the table lock option is UserNoReadLocking or AutoNoReadLocking. In that cases the table system does not acquire a read-lock, thus does not synchronize itself automatically.

Definition at line 1084 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::resync().

Vector<uInt> casa::Table::rowNumbers ( ) const

Get a vector of row numbers in the root table of rows in this table.

In case the table is a subset of the root table, this tells which rows of the root table are part of the subset. In case the table is the root table itself, the result is a vector containing the row numbers 0 .. #rows-1.
Note that in general it is better to use the next rowNumbers(Table) function.

Vector<uInt> casa::Table::rowNumbers	(	const Table &	that,
		Bool	tryFast = `False`
	)		const

Get a vector of row numbers in that table of rows in this table.

   In case the table is a subset of that table, this tells which
   rows of that table are part of the subset.
   In case the table is that table itself, the result is a vector
   containing the row numbers 0 .. \#rows-1.
   <br><strong>Caution:</strong><em> This function is in principle meant for cases
   where this table is a subset of that table; However, it can be used
   for any table; In that case the returned vector contains a very high
   number (max_uint) for rows in this table not part of that table;
   In that way they are invalid if used elsewhere;
   <br>In the general case creating the row number vector can be slowish,
   because it has to do two mappings; However, if this table is a subset
   of that table and if they are in the same order, the mapping can be done
   in a more efficient way; The argument <tt>tryFast</tt> can be used to
   tell the function to try a fast conversion first; If that cannot be done,
   it reverts to the slower way at the expense of an unsuccessful fast
   attempt;
   </em><br>

        Table tab("somename");
        Table subset = tab(some_select_expression);
        Vector<uInt> rownrs = subset.rowNumbers(tab);

Note that one cannot be sure that table "somename" is the root (i.e. original) table. It may also be a subset of another table. In the latter case doing
Vector<uInt> rownrs = subset.rowNumbers() does not give the row numbers in tab, but in the root table (which is probably not what you want).

TableRecord& casa::Table::rwKeywordSet ( )

Get read/write access to the table keyword set.

This requires that the table is locked (or it gets locked if using AutoLocking mode).

Referenced by casa::CalSetMetaInfo::fullSubTableName().

static ScratchCallback* casa::Table::setScratchCallback ( ScratchCallback * ) [static]

Set the pointer to the ScratchCallback function.

It returns the current value of the pointer. This function is called when changing the state of a table (i.e. create, close, rename, (un)markForDelete).

void casa::Table::showColumnInfo	(	ostream &	os,
		const TableDesc &	,
		uInt	maxNameLength,
		const Array< String > &	columnNames,
		Bool	sort
	)		const `[private]`

Show the info of the given columns.

Sort the columns if needed.

void casa::Table::showStructure	(	std::ostream &	os,
		Bool	showDataMans = `True`,
		Bool	showColumns = `True`,
		Bool	showSubTables = `False`,
		Bool	sortColumns = `False`
	)		const `[inline]`

Show the structure of the table.

It shows the columns (with types), the data managers, and the subtables. Optionally the columns can be sorted alphabetically.

Definition at line 1206 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::showStructure().

Table casa::Table::sort	(	const String &	columnName,
		int	= `Sort::Ascending`,
		int	= `Sort::HeapSort`
	)		const

Sort a table on one or more columns of scalars.

Per column a compare function can be provided. By default the standard compare function defined in Compare.h will be used. Default sort order is ascending. Default sorting algorithm is the heapsort.

Sort on one column.

Table casa::Table::sort	(	const Block< String > &	columnNames,
		int	= `Sort::Ascending`,
		int	= `Sort::HeapSort`
	)		const

Sort on multiple columns.

The principal column has to be the first element in the Block of column names.

Table casa::Table::sort	(	const Block< String > &	columnNames,
		const Block< Int > &	sortOrders,
		int	= `Sort::HeapSort`
	)		const

Sort on multiple columns.

The principal column has to be the first element in the Block of column names. The order can be given per column.

Table casa::Table::sort	(	const Block< String > &	columnNames,
		const Block< CountedPtr< BaseCompare > > &	compareObjects,
		const Block< Int > &	sortOrders,
		int	= `Sort::HeapSort`
	)		const

Sort on multiple columns.

The principal column has to be the first element in the Block of column names. The order can be given per column. Provide some special comparisons via CountedPtrs of compare objects. A null CountedPtr means using the standard compare object from class ObjCompare .

const TableDesc & casa::Table::tableDesc ( ) const [inline]

Get the table description.

This can be used to get nr of columns, etc.. tableDesc() gives the table description used when constructing the table, while actualTableDesc() gives the actual description, thus with the actual data managers used.

Definition at line 1143 of file Table.h.

References baseTabPtr_p, and casa::BaseTable::tableDesc().

Referenced by casa::MSTable< MSPointingEnums::PredefinedColumns, MSPointingEnums::PredefinedKeywords >::validate().

TableInfo casa::Table::tableInfo ( const String & tableName ) [inline, static]