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sqlite.php
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<?php
// +----------------------------------------------------------------------+
// | PHP versions 4 and 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2007 Manuel Lemos, Tomas V.V.Cox, |
// | Stig. S. Bakken, Lukas Smith, Lorenzo Alberton |
// | All rights reserved. |
// +----------------------------------------------------------------------+
// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
// | API as well as database abstraction for PHP applications. |
// | This LICENSE is in the BSD license style. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | |
// | Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution. |
// | |
// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
// | Lukas Smith nor the names of his contributors may be used to endorse |
// | or promote products derived from this software without specific prior|
// | written permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
// | POSSIBILITY OF SUCH DAMAGE. |
// +----------------------------------------------------------------------+
// | Authors: Lukas Smith <smith@pooteeweet.org> |
// | Lorenzo Alberton <l.alberton@quipo.it> |
// +----------------------------------------------------------------------+
//
// $Id: sqlite.php 295587 2010-02-28 17:16:38Z quipo $
//
require_once 'MDB2/Driver/Reverse/Common.php';
/**
* MDB2 SQlite driver for the schema reverse engineering module
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
*/
class MDB2_Driver_Reverse_sqlite extends MDB2_Driver_Reverse_Common
{
/**
* Remove SQL comments from the field definition
*
* @access private
*/
function _removeComments($sql) {
$lines = explode("\n", $sql);
foreach ($lines as $k => $line) {
$pieces = explode('--', $line);
if (count($pieces) > 1 && (substr_count($pieces[0], '\'') % 2) == 0) {
$lines[$k] = substr($line, 0, strpos($line, '--'));
}
}
return implode("\n", $lines);
}
/**
*
*/
function _getTableColumns($sql)
{
$db = $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$start_pos = strpos($sql, '(');
$end_pos = strrpos($sql, ')');
$column_def = substr($sql, $start_pos+1, $end_pos-$start_pos-1);
// replace the decimal length-places-separator with a colon
$column_def = preg_replace('/(\d),(\d)/', '\1:\2', $column_def);
$column_def = $this->_removeComments($column_def);
$column_sql = explode(',', $column_def);
$columns = array();
$count = count($column_sql);
if ($count == 0) {
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'unexpected empty table column definition list', __FUNCTION__);
}
$regexp = '/^\s*([^\s]+) +(CHAR|VARCHAR|VARCHAR2|TEXT|BOOLEAN|SMALLINT|INT|INTEGER|DECIMAL|TINYINT|BIGINT|DOUBLE|FLOAT|DATETIME|DATE|TIME|LONGTEXT|LONGBLOB)( ?\(([1-9][0-9]*)(:([1-9][0-9]*))?\))?( NULL| NOT NULL)?( UNSIGNED)?( NULL| NOT NULL)?( PRIMARY KEY)?( DEFAULT (\'[^\']*\'|[^ ]+))?( NULL| NOT NULL)?( PRIMARY KEY)?(\s*\-\-.*)?$/i';
$regexp2 = '/^\s*([^ ]+) +(PRIMARY|UNIQUE|CHECK)$/i';
for ($i=0, $j=0; $i<$count; ++$i) {
if (!preg_match($regexp, trim($column_sql[$i]), $matches)) {
if (!preg_match($regexp2, trim($column_sql[$i]))) {
continue;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'unexpected table column SQL definition: "'.$column_sql[$i].'"', __FUNCTION__);
}
$columns[$j]['name'] = trim($matches[1], implode('', $db->identifier_quoting));
$columns[$j]['type'] = strtolower($matches[2]);
if (isset($matches[4]) && strlen($matches[4])) {
$columns[$j]['length'] = $matches[4];
}
if (isset($matches[6]) && strlen($matches[6])) {
$columns[$j]['decimal'] = $matches[6];
}
if (isset($matches[8]) && strlen($matches[8])) {
$columns[$j]['unsigned'] = true;
}
if (isset($matches[9]) && strlen($matches[9])) {
$columns[$j]['autoincrement'] = true;
}
if (isset($matches[12]) && strlen($matches[12])) {
$default = $matches[12];
if (strlen($default) && $default[0]=="'") {
$default = str_replace("''", "'", substr($default, 1, strlen($default)-2));
}
if ($default === 'NULL') {
$default = null;
}
$columns[$j]['default'] = $default;
}
if (isset($matches[7]) && strlen($matches[7])) {
$columns[$j]['notnull'] = ($matches[7] === ' NOT NULL');
} else if (isset($matches[9]) && strlen($matches[9])) {
$columns[$j]['notnull'] = ($matches[9] === ' NOT NULL');
} else if (isset($matches[13]) && strlen($matches[13])) {
$columns[$j]['notnull'] = ($matches[13] === ' NOT NULL');
}
++$j;
}
return $columns;
}
// {{{ getTableFieldDefinition()
/**
* Get the stucture of a field into an array
*
* @param string $table_name name of table that should be used in method
* @param string $field_name name of field that should be used in method
* @return mixed data array on success, a MDB2 error on failure.
* The returned array contains an array for each field definition,
* with (some of) these indices:
* [notnull] [nativetype] [length] [fixed] [default] [type] [mdb2type]
* @access public
*/
function getTableFieldDefinition($table_name, $field_name)
{
$db = $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
list($schema, $table) = $this->splitTableSchema($table_name);
$result = $db->loadModule('Datatype', null, true);
if (PEAR::isError($result)) {
return $result;
}
$query = "SELECT sql FROM sqlite_master WHERE type='table' AND ";
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$query.= 'LOWER(name)='.$db->quote(strtolower($table), 'text');
} else {
$query.= 'name='.$db->quote($table, 'text');
}
$sql = $db->queryOne($query);
if (PEAR::isError($sql)) {
return $sql;
}
$columns = $this->_getTableColumns($sql);
foreach ($columns as $column) {
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
if ($db->options['field_case'] == CASE_LOWER) {
$column['name'] = strtolower($column['name']);
} else {
$column['name'] = strtoupper($column['name']);
}
} else {
$column = array_change_key_case($column, $db->options['field_case']);
}
if ($field_name == $column['name']) {
$mapped_datatype = $db->datatype->mapNativeDatatype($column);
if (PEAR::isError($mapped_datatype)) {
return $mapped_datatype;
}
list($types, $length, $unsigned, $fixed) = $mapped_datatype;
$notnull = false;
if (!empty($column['notnull'])) {
$notnull = $column['notnull'];
}
$default = false;
if (array_key_exists('default', $column)) {
$default = $column['default'];
if ((null === $default) && $notnull) {
$default = '';
}
}
$autoincrement = false;
if (!empty($column['autoincrement'])) {
$autoincrement = true;
}
$definition[0] = array(
'notnull' => $notnull,
'nativetype' => preg_replace('/^([a-z]+)[^a-z].*/i', '\\1', $column['type'])
);
if (null !== $length) {
$definition[0]['length'] = $length;
}
if (null !== $unsigned) {
$definition[0]['unsigned'] = $unsigned;
}
if (null !== $fixed) {
$definition[0]['fixed'] = $fixed;
}
if ($default !== false) {
$definition[0]['default'] = $default;
}
if ($autoincrement !== false) {
$definition[0]['autoincrement'] = $autoincrement;
}
foreach ($types as $key => $type) {
$definition[$key] = $definition[0];
if ($type == 'clob' || $type == 'blob') {
unset($definition[$key]['default']);
}
$definition[$key]['type'] = $type;
$definition[$key]['mdb2type'] = $type;
}
return $definition;
}
}
return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'it was not specified an existing table column', __FUNCTION__);
}
// }}}
// {{{ getTableIndexDefinition()
/**
* Get the stucture of an index into an array
*
* @param string $table_name name of table that should be used in method
* @param string $index_name name of index that should be used in method
* @return mixed data array on success, a MDB2 error on failure
* @access public
*/
function getTableIndexDefinition($table_name, $index_name)
{
$db = $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
list($schema, $table) = $this->splitTableSchema($table_name);
$query = "SELECT sql FROM sqlite_master WHERE type='index' AND ";
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$query.= 'LOWER(name)=%s AND LOWER(tbl_name)=' . $db->quote(strtolower($table), 'text');
} else {
$query.= 'name=%s AND tbl_name=' . $db->quote($table, 'text');
}
$query.= ' AND sql NOT NULL ORDER BY name';
$index_name_mdb2 = $db->getIndexName($index_name);
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$qry = sprintf($query, $db->quote(strtolower($index_name_mdb2), 'text'));
} else {
$qry = sprintf($query, $db->quote($index_name_mdb2, 'text'));
}
$sql = $db->queryOne($qry, 'text');
if (PEAR::isError($sql) || empty($sql)) {
// fallback to the given $index_name, without transformation
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$qry = sprintf($query, $db->quote(strtolower($index_name), 'text'));
} else {
$qry = sprintf($query, $db->quote($index_name, 'text'));
}
$sql = $db->queryOne($qry, 'text');
}
if (PEAR::isError($sql)) {
return $sql;
}
if (!$sql) {
return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'it was not specified an existing table index', __FUNCTION__);
}
$sql = strtolower($sql);
$start_pos = strpos($sql, '(');
$end_pos = strrpos($sql, ')');
$column_names = substr($sql, $start_pos+1, $end_pos-$start_pos-1);
$column_names = explode(',', $column_names);
if (preg_match("/^create unique/", $sql)) {
return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'it was not specified an existing table index', __FUNCTION__);
}
$definition = array();
$count = count($column_names);
for ($i=0; $i<$count; ++$i) {
$column_name = strtok($column_names[$i], ' ');
$collation = strtok(' ');
$definition['fields'][$column_name] = array(
'position' => $i+1
);
if (!empty($collation)) {
$definition['fields'][$column_name]['sorting'] =
($collation=='ASC' ? 'ascending' : 'descending');
}
}
if (empty($definition['fields'])) {
return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'it was not specified an existing table index', __FUNCTION__);
}
return $definition;
}
// }}}
// {{{ getTableConstraintDefinition()
/**
* Get the stucture of a constraint into an array
*
* @param string $table_name name of table that should be used in method
* @param string $constraint_name name of constraint that should be used in method
* @return mixed data array on success, a MDB2 error on failure
* @access public
*/
function getTableConstraintDefinition($table_name, $constraint_name)
{
$db = $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
list($schema, $table) = $this->splitTableSchema($table_name);
$query = "SELECT sql FROM sqlite_master WHERE type='index' AND ";
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$query.= 'LOWER(name)=%s AND LOWER(tbl_name)=' . $db->quote(strtolower($table), 'text');
} else {
$query.= 'name=%s AND tbl_name=' . $db->quote($table, 'text');
}
$query.= ' AND sql NOT NULL ORDER BY name';
$constraint_name_mdb2 = $db->getIndexName($constraint_name);
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$qry = sprintf($query, $db->quote(strtolower($constraint_name_mdb2), 'text'));
} else {
$qry = sprintf($query, $db->quote($constraint_name_mdb2, 'text'));
}
$sql = $db->queryOne($qry, 'text');
if (PEAR::isError($sql) || empty($sql)) {
// fallback to the given $index_name, without transformation
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$qry = sprintf($query, $db->quote(strtolower($constraint_name), 'text'));
} else {
$qry = sprintf($query, $db->quote($constraint_name, 'text'));
}
$sql = $db->queryOne($qry, 'text');
}
if (PEAR::isError($sql)) {
return $sql;
}
//default values, eventually overridden
$definition = array(
'primary' => false,
'unique' => false,
'foreign' => false,
'check' => false,
'fields' => array(),
'references' => array(
'table' => '',
'fields' => array(),
),
'onupdate' => '',
'ondelete' => '',
'match' => '',
'deferrable' => false,
'initiallydeferred' => false,
);
if (!$sql) {
$query = "SELECT sql FROM sqlite_master WHERE type='table' AND ";
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$query.= 'LOWER(name)='.$db->quote(strtolower($table), 'text');
} else {
$query.= 'name='.$db->quote($table, 'text');
}
$query.= " AND sql NOT NULL ORDER BY name";
$sql = $db->queryOne($query, 'text');
if (PEAR::isError($sql)) {
return $sql;
}
if ($constraint_name == 'primary') {
// search in table definition for PRIMARY KEYs
if (preg_match("/\bPRIMARY\s+KEY\b\s*\(([^)]+)/i", $sql, $tmp)) {
$definition['primary'] = true;
$definition['fields'] = array();
$column_names = explode(',', $tmp[1]);
$colpos = 1;
foreach ($column_names as $column_name) {
$definition['fields'][trim($column_name)] = array(
'position' => $colpos++
);
}
return $definition;
}
if (preg_match("/\"([^\"]+)\"[^\,\"]+\bPRIMARY\s+KEY\b[^\,\)]*/i", $sql, $tmp)) {
$definition['primary'] = true;
$definition['fields'] = array();
$column_names = explode(',', $tmp[1]);
$colpos = 1;
foreach ($column_names as $column_name) {
$definition['fields'][trim($column_name)] = array(
'position' => $colpos++
);
}
return $definition;
}
} else {
// search in table definition for FOREIGN KEYs
$pattern = "/\bCONSTRAINT\b\s+%s\s+
\bFOREIGN\s+KEY\b\s*\(([^\)]+)\)\s*
\bREFERENCES\b\s+([^\s]+)\s*\(([^\)]+)\)\s*
(?:\bMATCH\s*([^\s]+))?\s*
(?:\bON\s+UPDATE\s+([^\s,\)]+))?\s*
(?:\bON\s+DELETE\s+([^\s,\)]+))?\s*
/imsx";
$found_fk = false;
if (preg_match(sprintf($pattern, $constraint_name_mdb2), $sql, $tmp)) {
$found_fk = true;
} elseif (preg_match(sprintf($pattern, $constraint_name), $sql, $tmp)) {
$found_fk = true;
}
if ($found_fk) {
$definition['foreign'] = true;
$definition['match'] = 'SIMPLE';
$definition['onupdate'] = 'NO ACTION';
$definition['ondelete'] = 'NO ACTION';
$definition['references']['table'] = $tmp[2];
$column_names = explode(',', $tmp[1]);
$colpos = 1;
foreach ($column_names as $column_name) {
$definition['fields'][trim($column_name)] = array(
'position' => $colpos++
);
}
$referenced_cols = explode(',', $tmp[3]);
$colpos = 1;
foreach ($referenced_cols as $column_name) {
$definition['references']['fields'][trim($column_name)] = array(
'position' => $colpos++
);
}
if (isset($tmp[4])) {
$definition['match'] = $tmp[4];
}
if (isset($tmp[5])) {
$definition['onupdate'] = $tmp[5];
}
if (isset($tmp[6])) {
$definition['ondelete'] = $tmp[6];
}
return $definition;
}
}
$sql = false;
}
if (!$sql) {
return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
$constraint_name . ' is not an existing table constraint', __FUNCTION__);
}
$sql = strtolower($sql);
$start_pos = strpos($sql, '(');
$end_pos = strrpos($sql, ')');
$column_names = substr($sql, $start_pos+1, $end_pos-$start_pos-1);
$column_names = explode(',', $column_names);
if (!preg_match("/^create unique/", $sql)) {
return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
$constraint_name . ' is not an existing table constraint', __FUNCTION__);
}
$definition['unique'] = true;
$count = count($column_names);
for ($i=0; $i<$count; ++$i) {
$column_name = strtok($column_names[$i]," ");
$collation = strtok(" ");
$definition['fields'][$column_name] = array(
'position' => $i+1
);
if (!empty($collation)) {
$definition['fields'][$column_name]['sorting'] =
($collation=='ASC' ? 'ascending' : 'descending');
}
}
if (empty($definition['fields'])) {
return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
$constraint_name . ' is not an existing table constraint', __FUNCTION__);
}
return $definition;
}
// }}}
// {{{ getTriggerDefinition()
/**
* Get the structure of a trigger into an array
*
* EXPERIMENTAL
*
* WARNING: this function is experimental and may change the returned value
* at any time until labelled as non-experimental
*
* @param string $trigger name of trigger that should be used in method
* @return mixed data array on success, a MDB2 error on failure
* @access public
*/
function getTriggerDefinition($trigger)
{
$db = $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$query = "SELECT name as trigger_name,
tbl_name AS table_name,
sql AS trigger_body,
NULL AS trigger_type,
NULL AS trigger_event,
NULL AS trigger_comment,
1 AS trigger_enabled
FROM sqlite_master
WHERE type='trigger'";
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$query.= ' AND LOWER(name)='.$db->quote(strtolower($trigger), 'text');
} else {
$query.= ' AND name='.$db->quote($trigger, 'text');
}
$types = array(
'trigger_name' => 'text',
'table_name' => 'text',
'trigger_body' => 'text',
'trigger_type' => 'text',
'trigger_event' => 'text',
'trigger_comment' => 'text',
'trigger_enabled' => 'boolean',
);
$def = $db->queryRow($query, $types, MDB2_FETCHMODE_ASSOC);
if (PEAR::isError($def)) {
return $def;
}
if (empty($def)) {
return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'it was not specified an existing trigger', __FUNCTION__);
}
if (preg_match("/^create\s+(?:temp|temporary)?trigger\s+(?:if\s+not\s+exists\s+)?.*(before|after)?\s+(insert|update|delete)/Uims", $def['trigger_body'], $tmp)) {
$def['trigger_type'] = strtoupper($tmp[1]);
$def['trigger_event'] = strtoupper($tmp[2]);
}
return $def;
}
// }}}
// {{{ tableInfo()
/**
* Returns information about a table
*
* @param string $result a string containing the name of a table
* @param int $mode a valid tableInfo mode
*
* @return array an associative array with the information requested.
* A MDB2_Error object on failure.
*
* @see MDB2_Driver_Common::tableInfo()
* @since Method available since Release 1.7.0
*/
function tableInfo($result, $mode = null)
{
if (is_string($result)) {
return parent::tableInfo($result, $mode);
}
$db = $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_NOT_CAPABLE, null, null,
'This DBMS can not obtain tableInfo from result sets', __FUNCTION__);
}
}
?>

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