sqlite_create_aggregate

Register an aggregating UDF for use in SQL statements (PHP 5, PECL sqlite:1.0-1.0.3)
void sqlite_create_aggregate ( resource dbhandle, string function_name, callback step_func, callback finalize_func [, int num_args] )

Example 2323. max_length aggregation function example

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<?php

$data = array(

   'one',

   'two',

   'three',

   'four',

   'five',

   'six',

   'seven',

   'eight',

   'nine',

   'ten',

   );
$dbhandle = sqlite_open(':memory:');
sqlite_query($dbhandle, "CREATE TABLE strings(a)");

foreach ($data as $str) {

    $str = sqlite_escape_string($str);

    sqlite_query($dbhandle, "INSERT INTO strings VALUES ('$str')");

}


function max_len_step(&$context, $string) 

{

    if (strlen($string) > $context) {

        $context = strlen($string);

    }

}


function max_len_finalize(&$context) 

{

    return $context;

}

sqlite_create_aggregate($dbhandle, 'max_len', 'max_len_step', 'max_len_finalize');

var_dump(sqlite_array_query($dbhandle, 'SELECT max_len(a) from strings'));

?>

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sqlite_array_query
sqlite_busy_timeout
sqlite_changes
sqlite_close
sqlite_column
sqlite_create_aggregate
sqlite_create_function
sqlite_current
sqlite_error_string
sqlite_escape_string
sqlite_exec
sqlite_factory
sqlite_fetch_all
sqlite_fetch_array
sqlite_fetch_column_types
sqlite_fetch_object
sqlite_fetch_single
sqlite_fetch_string
sqlite_field_name
sqlite_has_more
sqlite_has_prev
sqlite_key
sqlite_last_error
sqlite_last_insert_rowid
sqlite_libencoding
sqlite_libversion
sqlite_next
sqlite_num_fields
sqlite_num_rows
sqlite_open
sqlite_popen
sqlite_prev
sqlite_query
sqlite_rewind
sqlite_seek
sqlite_single_query
sqlite_udf_decode_binary
sqlite_udf_encode_binary
sqlite_unbuffered_query
sqlite_valid

sqlite_create_aggregate

Register an aggregating UDF for use in SQL statements (PHP 5, PECL sqlite:1.0-1.0.3) void sqlite_create_aggregate ( resource dbhandle, string function_name, callback step_func, callback finalize_func [, int num_args] )

Example 2323. max_length aggregation function example

Change Language

Register an aggregating UDF for use in SQL statements (PHP 5, PECL sqlite:1.0-1.0.3)
void sqlite_create_aggregate ( resource dbhandle, string function_name, callback step_func, callback finalize_func [, int num_args] )