+Uses DBI::execute to execute QUERY on DBH using ARRAY for binding values. As with do_query, FORM is only used for error handling. If you are unsure what to use, refer to the documentation of DBI::do and DBI::execute.
+
+Returns the result of DBI::execute which is -1 in case of an error and the number of affected rows otherwise.
+
+=item prepare_execute_query FORM,DBH,QUERY,ARRAY
+
+Prepares and executes QUERY on DBH using DBI::prepare and DBI::execute. ARRAY is passed as binding values to execute.
+
+=back
+
+=head2 RETRIEVAL FUNCTIONS
+
+=over 4
+
+=item selectfirst_array_query FORM,DBH,QUERY,ARRAY
+
+=item selectrow_query FORM,DBH,QUERY,ARRAY
+
+Prepares and executes a query using DBUtils functions, retireves the first row from the database, and returns it as an arrayref of the first row.
+
+=item selectfirst_hashref_query FORM,DBH,QUERY,ARRAY
+
+Prepares and executes a query using DBUtils functions, retireves the first row from the database, and returns it as a hashref of the first row.
+
+=item selectall_hashref_query FORM,DBH,QUERY,ARRAY
+
+Prepares and executes a query using DBUtils functions, retireves all data from the database, and returns it in hashref mode. This is slightly confusing, as the data structure will actually be a reference to an array, containing hashrefs for each row.
+
+=item selectall_as_map FORM,DBH,QUERY,KEY_COL,VALUE_COL,ARRAY
+
+Prepares and executes a query using DBUtils functions, retireves all data from the database, and creates a hash from the results using KEY_COL as the column for the hash keys and VALUE_COL for its values.
+
+=back
+
+=head2 UTILITY FUNCTIONS
+
+=over 4
+
+=item create_sort_spec
+
+ params:
+ defs => { }, # mandatory
+ default => 'name', # mandatory
+ column => 'name',
+ default_dir => 0|1,
+ dir => 0|1,
+
+ returns hash:
+ column => 'name',
+ dir => 0|1,
+ sql => 'SQL code',
+
+This function simplifies the creation of SQL code for sorting
+columns. It uses a hashref of valid column names, the column name and
+direction requested by the user, the application defaults for the
+column name and the direction and returns the actual column name,
+direction and SQL code that can be used directly in a query.
+
+The parameter 'defs' is a hash reference. The keys are the column
+names as they may come from the application. The values are either
+scalars with SQL code or array references of SQL code. Example:
+
+'defs' => { 'customername' => 'lower(customer.name)',
+ 'address' => [ 'lower(customer.city)', 'lower(customer.street)' ], }
+
+'default' is the default column name to sort by. It must be a key of
+'defs' and should not be come from user input.
+
+The 'column' parameter is the column name as requested by the
+application (e.g. if the user clicked on a column header in a
+report). If it is invalid then the 'default' parameter will be used
+instead.
+
+'default_dir' is the default sort direction. A true value means 'sort
+ascending', a false one 'sort descending'. 'default_dir' defaults to
+'1' if undefined.
+
+The 'dir' parameter is the sort direction as requested by the
+application (e.g. if the user clicked on a column header in a
+report). If it is undefined then the 'default_dir' parameter will be
+used instead.
+
+=back
+
+=head2 DEBUG FUNCTIONS
+
+=over 4
+
+=item dump_query LEVEL,MSG,QUERY,ARRAY
+
+Dumps a query using LXDebug->message, using LEVEL for the debug-level of LXDebug. If MSG is given, it preceeds the QUERY dump in the logfiles. ARRAY is used to interpolate the '?' placeholders in QUERY, the resulting QUERY can be copy-pasted into a database frontend for debugging. Note that this method is also automatically called by each of the other QUERY FUNCTIONS, so there is in general little need to invoke it manually.
+
+=back
+
+=head1 EXAMPLES
+
+=over 4
+
+=item Retrieving a whole table:
+
+ $query = qq|SELECT id, pricegroup FROM pricegroup|;
+ $form->{PRICEGROUPS} = selectall_hashref_query($form, $dbh, $query);
+
+=item Retrieving a single value:
+
+ $query = qq|SELECT nextval('glid')|;
+ ($new_id) = selectrow_query($form, $dbh, $query);
+
+=item Using binding values:
+
+ $query = qq|UPDATE ar SET paid = amount + paid, storno = 't' WHERE id = ?|;
+ do_query($form, $dbh, $query, $id);
+
+=item A more complicated example, using dynamic binding values:
+
+ my @values;
+
+ if ($form->{language_values} ne "") {
+ $query = qq|SELECT l.id, l.description, tr.translation, tr.longdescription
+ FROM language l
+ LEFT OUTER JOIN translation tr ON (tr.language_id = l.id) AND (tr.parts_id = ?)|;
+ @values = (conv_i($form->{id}));
+ } else {
+ $query = qq|SELECT id, description FROM language|;
+ }
+
+ my $languages = selectall_hashref_query($form, $dbh, $query, @values);