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Re: Stored Procedures retrieving multiple result sets
Posted by: Peter Brawley
Date: May 21, 2016 11:52PM

sprocs return multiple resultsets. Usually no problem calling them in the mysql commandline client program.

Calling them in a program you write requires that you use the multi-query facility of the API of the language you're using. The PHP for calling an sproc that might do multiple Selects looks like this ...

$mysqli = new mysqli(  "HOST", "USR", "PWD", "DBNAME" ); 
$res = $mysqli->multi_query( "CALL myproc($ivalue,@x);SELECT @x" ); 
if( $res ) { 
  $results = 0; 
  do { 
    if ($result = $mysqli->store_result()) { 
      printf( "<b>Result #%u</b>:<br/>", ++$results ); 
      while( $row = $result->fetch_row() ) { 
        // do something with the row 
      if( $mysqli->more_results() ) echo "<br/>"; 
  } while( $mysqli->next_result() ); 

The logic is similar in other APIs (Java, C# &c).

> url's where I can go and search some useful content about mysql only

The "Documentation" link at the top of this page, and ...

Edited 1 time(s). Last edit at 05/21/2016 11:55PM by Peter Brawley.

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Re: Stored Procedures retrieving multiple result sets
May 21, 2016 11:52PM

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