_appendN($sql); return ADODB_mssql::_query($sql,$inputarr); } /** * This function will intercept all the literals used in the SQL, prepending the "N" char to them * in order to allow mssql to store properly data sent in the correct UCS-2 encoding (by freeTDS * and ODBTP) keeping SQL compatibility at ADOdb level (instead of hacking every project to add * the "N" notation when working against MSSQL. * * Note that this hack only must be used if ALL the char-based columns in your DB are of type nchar, * nvarchar and ntext */ function _appendN($sql) { $result = $sql; /// Check we have some single quote in the query. Exit ok. if (strpos($sql, SINGLEQUOTE) === false) { return $sql; } /// Check we haven't an odd number of single quotes (this can cause problems below /// and should be considered one wrong SQL). Exit with debug info. if ((substr_count($sql, SINGLEQUOTE) & 1)) { if ($this->debug) { ADOConnection::outp("{$this->databaseType} internal transformation: not converted. Wrong number of quotes (odd)"); } return $sql; } /// Check we haven't any backslash + single quote combination. It should mean wrong /// backslashes use (bad magic_quotes_sybase?). Exit with debug info. $regexp = '/(\\\\' . SINGLEQUOTE . '[^' . SINGLEQUOTE . '])/'; if (preg_match($regexp, $sql)) { if ($this->debug) { ADOConnection::outp("{$this->databaseType} internal transformation: not converted. Found bad use of backslash + single quote"); } return $sql; } /// Remove pairs of single-quotes $pairs = array(); $regexp = '/(' . SINGLEQUOTE . SINGLEQUOTE . ')/'; preg_match_all($regexp, $result, $list_of_pairs); if ($list_of_pairs) { foreach (array_unique($list_of_pairs[0]) as $key=>$value) { $pairs['<@#@#@PAIR-'.$key.'@#@#@>'] = $value; } if (!empty($pairs)) { $result = str_replace($pairs, array_keys($pairs), $result); } } /// Remove the rest of literals present in the query $literals = array(); $regexp = '/(N?' . SINGLEQUOTE . '.*?' . SINGLEQUOTE . ')/is'; preg_match_all($regexp, $result, $list_of_literals); if ($list_of_literals) { foreach (array_unique($list_of_literals[0]) as $key=>$value) { $literals['<#@#@#LITERAL-'.$key.'#@#@#>'] = $value; } if (!empty($literals)) { $result = str_replace($literals, array_keys($literals), $result); } } /// Analyse literals to prepend the N char to them if their contents aren't numeric if (!empty($literals)) { foreach ($literals as $key=>$value) { if (!is_numeric(trim($value, SINGLEQUOTE))) { /// Non numeric string, prepend our dear N $literals[$key] = 'N' . trim($value, 'N'); //Trimming potentially existing previous "N" } } } /// Re-apply literals to the text if (!empty($literals)) { $result = str_replace(array_keys($literals), $literals, $result); } /// Any pairs followed by N' must be switched to N' followed by those pairs /// (or strings beginning with single quotes will fail) $result = preg_replace("/((<@#@#@PAIR-(\d+)@#@#@>)+)N'/", "N'$1", $result); /// Re-apply pairs of single-quotes to the text if (!empty($pairs)) { $result = str_replace(array_keys($pairs), $pairs, $result); } /// Print transformation if debug = on if ($result != $sql && $this->debug) { ADOConnection::outp("{$this->databaseType} internal transformation:
{$sql}
to
{$result}"); } return $result; } } class ADORecordset_mssql_n extends ADORecordset_mssql { var $databaseType = "mssql_n"; function ADORecordset_mssql_n($id,$mode=false) { $this->ADORecordset_mssql($id,$mode); } } ?>