Metadata about columns in regular and compute rows. More...

#include <tds.h>

Collaboration diagram for tds_column:

Public Attributes
BCPCOLDATA *	bcp_column_data

TDS_INT	bcp_prefix_len
	The length, in bytes, of any length prefix this column may have.

TDS_INT	bcp_term_len

TDS_CHAR *	bcp_terminator

TDSICONV *	char_conv
	refers to previously allocated iconv information

TDS_SMALLINT	column_bindfmt

TDS_INT	column_bindlen

TDS_SMALLINT	column_bindtype

TDS_UCHAR	column_collation [5]

unsigned char	column_computed:1

TDS_INT	column_cur_size
	size written in variable (ie: char, text, binary).

unsigned char *	column_data

void(*	column_data_free )(struct tds_column *column)

TDS_INT	column_flags

unsigned char	column_hidden:1

char	column_iconv_buf [9]

unsigned char	column_iconv_left

unsigned char	column_identity:1

unsigned char	column_key:1

TDS_INT *	column_lenbind

DSTR	column_name

unsigned char	column_nullable:1

TDS_SMALLINT *	column_nullbind

TDS_SMALLINT	column_operand

TDS_TINYINT	column_operator

unsigned char	column_output:1

TDS_TINYINT	column_prec
	precision for decimal/numeric

TDS_TINYINT	column_scale
	scale for decimal/numeric

TDS_INT	column_size
	maximun size of data.

TDS_INT	column_text_sqlgetdatapos

TDS_CHAR	column_text_sqlputdatainfo

TDS_INT	column_textpos

unsigned char	column_timestamp:1

TDS_SERVER_TYPE	column_type
	This type can be different from wire type because conversion (e.g.

TDS_INT	column_usertype

TDS_CHAR *	column_varaddr

TDS_TINYINT	column_varint_size
	size of length when reading from wire (0, 1, 2 or 4)

unsigned char	column_writeable:1

const TDSCOLUMNFUNCS *	funcs

struct {

TDS_INT column_size

TDS_SERVER_TYPE column_type
	type of data, saved from wire

}	on_server

DSTR	table_column_name

DSTR	table_name

Detailed Description

Metadata about columns in regular and compute rows.

Member Data Documentation

◆ bcp_prefix_len

TDS_INT tds_column::bcp_prefix_len

The length, in bytes, of any length prefix this column may have.

For example, strings in some non-C programming languages are made up of a one-byte length prefix, followed by the string data itself. If the data do not have a length prefix, set prefixlen to 0. Currently not very used in code, however do not remove.

◆ column_cur_size

TDS_INT tds_column::column_cur_size

size written in variable (ie: char, text, binary).

-1 if NULL.

◆ column_size

TDS_INT tds_column::column_size

maximun size of data.

For fixed is the size.

◆ column_type

TDS_SERVER_TYPE tds_column::column_type

This type can be different from wire type because conversion (e.g.

type of data, saved from wire

UCS-2->Ascii) can be applied. I'm beginning to wonder about the wisdom of this, however. April 2003 jkl

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