ibis::tafel::column Struct Reference

In-memory version of a column. More...

#include <tafel.h>

Public Member Functions
	column ()
	Default constructor. The name and type are assigned later.
	~column ()
	Destructor.

Public Attributes
void *	defval
	The default value for the column. More...
std::string	desc
	Description of the column.
std::string	dictfile
	Dictionary file name. More...
std::string	indexSpec
	Index specification for the column.
ibis::bitvector	mask
	Valid values are marked 1, null values are marked 0.
std::string	name
	Name of the column.
ibis::TYPE_T	type
	Type of the data.
void *	values
	Pointer to the in-memory storage. More...

Detailed Description

In-memory version of a column.

Member Data Documentation

void* ibis::tafel::column::defval

The default value for the column.

SQL standard allows a column to take on a default value if it is not explicitly specified. For fix-sized elements, this variable points to the default of the given type. For string values, this is a pointer to a std::string. If this variable is nil, the unspecified values will be marked as null values through the variable mask.

Referenced by ibis::tafel::assignDefaultValue(), ibis::tafel::normalize(), and ibis::tafel::SQLCreateTable().

std::string ibis::tafel::column::dictfile

Dictionary file name.

The name of an ASCII dictionary in a format similar to the one produced by ibis::dictionary::toASCII.

Referenced by ibis::tafel::getASCIIDictionary(), ibis::tafel::setASCIIDictionary(), and ibis::tafel::writeMetaData().

void* ibis::tafel::column::values

Pointer to the in-memory storage.

For fix-sized elements, this is a pointer to an array_t object. For null-terminated strings, this is a pointer to std::vector<std::string>. For binary objects, it is std::vector<ibis::opaque>.

Referenced by ibis::tafel::addColumn(), ibis::tafel::append(), ibis::tafel::bufferCapacity(), ibis::tafel::clearData(), ibis::tafel::doReserve(), ibis::tafel::normalize(), ibis::tafel::parseLine(), ibis::tafel::SQLCreateTable(), and ibis::tafel::toTable().

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

• tafel.h
• tafel.cpp