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HOWTO: Use AERROR() in Place of DBERROR() for ODBC Errors

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This article was previously published under Q130506

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Summary

DBERROR() is no longer used to retrieve errors generated by an ODBC function.

AERROR() is a general Visual FoxPro error function that creates a memory variable array containing information about the most recent Visual FoxPro, OLE, or ODBC error.

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More information

The following example shows how to use AERROR(). Here a database is specified in the ODBC function SQLEXEC() that does not exist on the server. 
   nHandle=SQLCONNECT('<SQL Server data source>','sa','')
   nSuccess=SQLEXEC(nHandle,'use bad_db')
   Dimension aErrArray[1]
   nNumerrors=AERROR(aErrArray)
The variable nNumerrors now contains the number of rows in the array aErrArray (2 in this case) and the array aErrArray contains the error information, as shown below: 
AERRARRAY   Pub  A
(1,1)            N    1526    (           1526.00000000)
(1,2)            C    "Connectivity error: [Microsoft][ODBC SQL Server
                           Driver][SQL Server] Attempt to locate entry in
                           Sysdatabases for database 'bad_db' by name
                           failed - no entry found under that name. Make
                           sure that name is entered properly."
(1,3)            C    "[Microsoft][ODBC SQL Server Driver][SQL Server]
                           Attempt to locate entry in Sysdatabases for
                           database 'bad_db' by name failed - no entry
                           found under that name. Make sure that name is
                           entered properly."
(1,4)            C    "08004"
(1,5)            N    911      (            911.00000000)
(1,6)            N    1        (              1.00000000)
(1,7)            C    .NULL.
(2,1)            N    1526     (           1526.00000000)
(2,2)            C    "Connectivity error: [Microsoft][ODBC SQL Server
                           Driver][SQL Server] Attempt to locate entry in
                           Sysdatabases for database 'bad_db' by name
                           failed - no entry found under that name. Make
                           sure that name is entered properly."
(2,3)            C    "[Microsoft][ODBC SQL Server Driver][SQL Server]
                           Changed database context to 'pubs'."
(2,4)            C    "01000"
(2,5)            N    5701     (           5701.00000000)
(2,6)            N    1        (              1.00000000)
(2,7)            C    .NULL.
The following table describes the contents of each element when an ODBC error numbered 1526 occurs. The array contains two or more rows; one row for each ODBC error.

Element number Description

     1          Numeric. Contains 1526.
     2          Character. The text of the error message.
     3          Character. The text of the ODBC error message.
     4          Character. The current ODBC SQL state.
     5          Numeric. The error number from the ODBC data source.
     6          Numeric. The ODBC connection handle.
     7          The null value.

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Keywords: kbhowto, KB130506

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Article Info
Article ID : 130506
Revision : 4
Created on : 2/22/2005
Published on : 2/22/2005
Exists online : False
Views : 545