Re: C API Function for count(*)
You might get closer to what you want if you put your command in a text file and run it from the command line. On a Mac OS X, I put a similar command: select count(*) from testTable; into a small text file: testCount.txt and ran this command from the Terminal: mysql -u username -ppassword /Users/myname/Documents/testCount.txt The result was: COUNT(*) 12 without the decorations. Bob On May 14, 2010, at 11:35 PM, Dan Nelson wrote: In the last episode (May 14), Tim Johnson said: I have MySQL version 5.0.84 on linux slackware 13.0 32-bit. I am working with a relatively new API written in a programming language with a small user base (newlisp). The newlisp API imports a number of C API functions from the system MySQL shared object. If I were to issue a count(*) query from my monitor interface: Example: mysql select count(*) from clients; +--+ | count(*) | +--+ | 16 | +--+ If select count(*) from clients is issued from the newlisp API, is there a a C API function that would return '16'? You can't do it with one function call, but you can do it, since the MySQL cli was able to print 16 in your example above, and it was written in C. Take a look at mysql_store_result(), mysql_num_fields(), mysql_field_count(), mysql_fetch_row(), and mysql_fetch_lengths(). There's a simple code fragment to print a resultset on this page: http://dev.mysql.com/doc/refman/5.1/en/mysql-fetch-row.html -- Dan Nelson dnel...@allantgroup.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=bobc...@earthlink.net -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: C API Function for count(*)
* Dan Nelson dnel...@allantgroup.com [100514 21:38]: You can't do it with one function call, but you can do it, since the MySQL cli was able to print 16 in your example above, and it was written in C. Take a look at mysql_store_result(), mysql_num_fields(), mysql_field_count(), mysql_fetch_row(), and mysql_fetch_lengths(). There's a simple code fragment to print a resultset on this page: http://dev.mysql.com/doc/refman/5.1/en/mysql-fetch-row.html Thanks Dan. I can use the C code there to model the code for the API. cheers -- Tim tim at johnsons-web.com or akwebsoft.com http://www.akwebsoft.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: C API Function for count(*)
* Bob Cole bobc...@earthlink.net [100515 06:58]: You might get closer to what you want if you put your command in a text file and run it from the command line. On a Mac OS X, I put a similar command: select count(*) from testTable; into a small text file: testCount.txt and ran this command from the Terminal: mysql -u username -ppassword /Users/myname/Documents/testCount.txt The result was: COUNT(*) 12 Hi Bob: That's a good trick. It doesn't fit the API that I am trying to enhance, but it could be a good workaround by 'echo'ing to a tmpfile. Thanks. -- Tim tim at johnsons-web.com or akwebsoft.com http://www.akwebsoft.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
C API Function for count(*)
I have MySQL version 5.0.84 on linux slackware 13.0 32-bit. I am working with a relatively new API written in a programming language with a small user base (newlisp). The newlisp API imports a number of C API functions from the system MySQL shared object. If I were to issue a count(*) query from my monitor interface: Example: mysql select count(*) from clients; +--+ | count(*) | +--+ | 16 | +--+ If select count(*) from clients is issued from the newlisp API, is there a a C API function that would return '16'? I have reviewed http://dev.mysql.com/doc/refman/5.1/en/c-api-functions.html and haven't been enlightened so far. I believe that I could parse the results as a string, but if I could access count(*) as a C function, it would be more efficient. I have a background in C. thanks -- Tim tim at johnsons-web.com or akwebsoft.com http://www.akwebsoft.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: C API Function for count(*)
In the last episode (May 14), Tim Johnson said: I have MySQL version 5.0.84 on linux slackware 13.0 32-bit. I am working with a relatively new API written in a programming language with a small user base (newlisp). The newlisp API imports a number of C API functions from the system MySQL shared object. If I were to issue a count(*) query from my monitor interface: Example: mysql select count(*) from clients; +--+ | count(*) | +--+ | 16 | +--+ If select count(*) from clients is issued from the newlisp API, is there a a C API function that would return '16'? You can't do it with one function call, but you can do it, since the MySQL cli was able to print 16 in your example above, and it was written in C. Take a look at mysql_store_result(), mysql_num_fields(), mysql_field_count(), mysql_fetch_row(), and mysql_fetch_lengths(). There's a simple code fragment to print a resultset on this page: http://dev.mysql.com/doc/refman/5.1/en/mysql-fetch-row.html -- Dan Nelson dnel...@allantgroup.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
