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PX_retrieve_record -- Returns record in Paradox file


#include <paradox.h>

pxval_t ** PX_retrieve_record(pxdoc_t *pxdoc, int recno)


Returns the record with the given number in a Paradox file. The first record has number 0, the last one has number_of_records-1.

If you are accessing several records, do it in ascending order, because this is the most efficient way.

The return value is an array of field values. Each value is stored in a structure like the following:

typedef struct px_val pxval_t;
struct px_val {
	char isnull;
	int type;
	union {
		long lval;
		double dval;
		struct {
			char *val;
			int len;
		} str;
	} value;

The element isnull is set to 1 if the value is NULL otherwise it is set to 0. type is the type of the paradox field as defined in paradox.h. A field value can be either a long int, a double or a string, depending on the paradox field type. The paradox field types pxfShort, pxfLong, pxfDate, pxfTime, pxfLogical, and pxfAutoInc are returned as long int values. pxfTimestamp, pxfNumber, and pxfCurrency are returned as double values and all remaining paradox field types are stored as strings with the length in value.len. You can rely on strings being Null terminated. Blobs are stored as string but are not guarented to be Null terminated.

The paradox field types pxfTimestamp, pxfTime, an pxfDate use an uncommon format which can be converted into a string with PX_timestamp2string(3), PX_time2string(3), and PX_date2string(3).


Returns a pointer on success and NULL on failure.


This manual page was written by Uwe Steinmann .

Latest News

Released version 0.6.6

April 07, 2016

This release fixes some more typos in the documentation.

Released version 0.6.5

Jannuary 11, 2012

pxlib isn't dead, its development has just slowed down. This release fixes some typos and optimizes the configuration process.

Released version 0.6.2

September 19, 2007

This one fixes a long lasting bug on 64 bit architectures. It also is compilable in a mingw environment and Visual C++ with the help of cmake.

Released version 0.6.1

March 29, 2006

There were some bugs related to the changes of the last release. This version fixes them. Besides that the following has changed:

  • Much better support for secondary indexes
  • PX_insert_record() and PX_update_record() treat null values propperly
  • PX_delete_record() now updates the internal index without corrupting it.
  • Various man page updates.
  • Auto increment fields of type pxfAutoInc.
  • Fixed some compile errors and warnings.
  • Fixed various small bugs and memory leaks.

Released version 0.6.0

February 6, 2006

This version includes some major changes to the api while retaining compatible to older versions. If you use the new functions expect bugs but also a much simplier record handling.

  • Databases can be read and written after opening with PX_open_xxx()
  • Use a cache for reading encrypted blobs
  • Added new functions PX_delete_record(), PX_update_record(), PX_insert_record(), PX_retrieve_record()
  • reading and writing encrypted blob files is more efficient.
  • No more than 64 blobs will be stored in blocks of type 3
  • Fixed various small bugs and memory leaks.

Released version 0.5.1

August 11, 2005

  • fixed bug when reading header of blob (Thanks to Giovanni Giacobbi)
  • fixes bug when reading blobs of a certain size from an encrypted .mb file.
  • reading and writing encrypted blob files is more efficient.

Released version 0.5.0

July 14, 2005

  • support for encrypted databases and blob files

New web site

02 Feb 05

After a long time the web site has been overhauled with much more information about pxlib.