Error202
/
yii2-bootstrap
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
Browse Source

w

tags/2.0.0-beta
Qiang Xue 13 years ago
parent
8f15fd4101
commit
05c7915d8a
7 changed files with 1766 additions and 1 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 148
      framework/db/dao/ColumnSchema.php
  2. 4
      framework/db/dao/Command.php
  3. 61
      framework/db/dao/Expression.php
  4. 520
      framework/db/dao/Query.php
  5. 402
      framework/db/dao/QueryBuilder.php
  6. 556
      framework/db/dao/Schema.php
  7. 76
      framework/db/dao/TableSchema.php

148
framework/db/dao/ColumnSchema.php
Unescape View File

@ -0,0 +1,148 @@
<?php
/**
* CDbColumnSchema class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2011 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
/**
* CDbColumnSchema class describes the column meta data of a database table.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id: CDbColumnSchema.php 3099 2011-03-19 01:26:47Z qiang.xue $
* @package system.db.schema
* @since 1.0
*/
class CDbColumnSchema extends CComponent
{
/**
* @var string name of this column (without quotes).
*/
public $name;
/**
* @var string raw name of this column. This is the quoted name that can be used in SQL queries.
*/
public $rawName;
/**
* @var boolean whether this column can be null.
*/
public $allowNull;
/**
* @var string the DB type of this column.
*/
public $dbType;
/**
* @var string the PHP type of this column.
*/
public $type;
/**
* @var mixed default value of this column
*/
public $defaultValue;
/**
* @var integer size of the column.
*/
public $size;
/**
* @var integer precision of the column data, if it is numeric.
*/
public $precision;
/**
* @var integer scale of the column data, if it is numeric.
*/
public $scale;
/**
* @var boolean whether this column is a primary key
*/
public $isPrimaryKey;
/**
* @var boolean whether this column is a foreign key
*/
public $isForeignKey;
/**
* @var boolean whether this column is auto-incremental
* @since 1.1.7
*/
public $autoIncrement = false;
/**
* Initializes the column with its DB type and default value.
* This sets up the column's PHP type, size, precision, scale as well as default value.
* @param string $dbType the column's DB type
* @param mixed $defaultValue the default value
*/
public function init($dbType, $defaultValue)
{
$this->dbType = $dbType;
$this->extractType($dbType);
$this->extractLimit($dbType);
if ($defaultValue !== null)
$this->extractDefault($defaultValue);
}
/**
* Extracts the PHP type from DB type.
* @param string $dbType DB type
*/
protected function extractType($dbType)
{
if (stripos($dbType, 'int') !== false && stripos($dbType, 'unsigned int') === false)
$this->type = 'integer';
elseif (stripos($dbType, 'bool') !== false)
$this->type = 'boolean';
elseif (preg_match('/(real|floa|doub)/i', $dbType))
$this->type = 'double';
else
$this->type = 'string';
}
/**
* Extracts size, precision and scale information from column's DB type.
* @param string $dbType the column's DB type
*/
protected function extractLimit($dbType)
{
if (strpos($dbType, '(') && preg_match('/\((.*)\)/', $dbType, $matches))
{
$values = explode(',', $matches[1]);
$this->size = $this->precision = (int)$values[0];
if (isset($values[1]))
$this->scale = (int)$values[1];
}
}
/**
* Extracts the default value for the column.
* The value is typecasted to correct PHP type.
* @param mixed $defaultValue the default value obtained from metadata
*/
protected function extractDefault($defaultValue)
{
$this->defaultValue = $this->typecast($defaultValue);
}
/**
* Converts the input value to the type that this column is of.
* @param mixed $value input value
* @return mixed converted value
*/
public function typecast($value)
{
if (gettype($value) === $this->type || $value === null || $value instanceof CDbExpression)
return $value;
if ($value === '')
return $this->type === 'string' ? '' : null;
switch ($this->type)
{
case 'string': return (string)$value;
case 'integer': return (integer)$value;
case 'boolean': return (boolean)$value;
case 'double':
default: return $value;
}
}
}

4
framework/db/dao/Command.php
Unescape View File

@ -8,6 +8,8 @@
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\dao;
/**
* Command represents a SQL statement to be executed against a database.
*
@ -40,7 +42,7 @@
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class Command extends CComponent
class Command extends \yii\base\Component
{
/**
* @var array the parameters (name=>value) to be bound to the current query.

61
framework/db/dao/Expression.php
Unescape View File

@ -0,0 +1,61 @@
<?php
/**
* Expression class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2012 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\dao;
/**
* Expression represents a DB expression that does not need escaping or quoting.
* When an Expression object is embedded within a SQL statement or fragment,
* it will be replaced with the [[expression]] property value without any
* DB escaping or quoting. For example,
*
* ~~~
* $expression = new Expression('NOW()');
* $sql = 'SELECT ' . $expression; // SELECT NOW()
* ~~~
*
* An expression can also be bound with parameters specified via [[params]].
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class Expression
{
/**
* @var string the DB expression
*/
public $expression;
/**
* @var array list of parameters that should be bound for this expression.
* The keys are placeholders appearing in [[expression]] and the values
* are the corresponding parameter values.
*/
public $params = array();
/**
* Constructor.
* @param string $expression the DB expression
* @param array $params parameters
*/
public function __construct($expression, $params = array())
{
$this->expression = $expression;
$this->params = $params;
}
/**
* String magic method
* @return string the DB expression
*/
public function __toString()
{
return $this->expression;
}
}

520
framework/db/dao/Query.php
Unescape View File

@ -0,0 +1,520 @@
<?php
/**
* Query class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2012 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\dao;
/**
* Query represents the components in a DB query.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class Query extends CComponent
{
/**
* @var mixed the columns being selected. This refers to the SELECT clause in an SQL
* statement. The property can be either a string (column names separated by commas)
* or an array of column names. Defaults to '*', meaning all columns.
*/
public $select;
public $from;
/**
* @var boolean whether to select distinct rows of data only. If this is set true,
* the SELECT clause would be changed to SELECT DISTINCT.
*/
public $distinct;
/**
* @var string query condition. This refers to the WHERE clause in an SQL statement.
* For example, <code>age>31 AND team=1</code>.
*/
public $where;
/**
* @var integer maximum number of records to be returned. If less than 0, it means no limit.
*/
public $limit;
/**
* @var integer zero-based offset from where the records are to be returned. If less than 0, it means starting from the beginning.
*/
public $offset;
/**
* @var string how to sort the query results. This refers to the ORDER BY clause in an SQL statement.
*/
public $orderBy;
/**
* @var string how to group the query results. This refers to the GROUP BY clause in an SQL statement.
* For example, <code>'projectID, teamID'</code>.
*/
public $groupBy;
/**
* @var string how to join with other tables. This refers to the JOIN clause in an SQL statement.
* For example, <code>'LEFT JOIN users ON users.id=authorID'</code>.
*/
public $join;
/**
* @var string the condition to be applied with GROUP-BY clause.
* For example, <code>'SUM(revenue)<50000'</code>.
*/
public $having;
/**
* @var array list of query parameter values indexed by parameter placeholders.
* For example, <code>array(':name'=>'Dan', ':age'=>31)</code>.
*/
public $params;
public $union;
public function getSql($connection)
{
return $connection->getQueryBuilder()->build($this);
}
/**
* Appends a condition to the existing {@link condition}.
* The new condition and the existing condition will be concatenated via the specified operator
* which defaults to 'AND'.
* The new condition can also be an array. In this case, all elements in the array
* will be concatenated together via the operator.
* This method handles the case when the existing condition is empty.
* After calling this method, the {@link condition} property will be modified.
* @param mixed $condition the new condition. It can be either a string or an array of strings.
* @param string $operator the operator to join different conditions. Defaults to 'AND'.
* @return Query the criteria object itself
* @since 1.0.9
*/
public function addCondition($condition, $operator = 'AND')
{
if (is_array($condition))
{
if ($condition === array())
return $this;
$condition = '(' . implode(') ' . $operator . ' (', $condition) . ')';
}
if ($this->condition === '')
$this->condition = $condition;
else
$this->condition = '(' . $this->condition . ') ' . $operator . ' (' . $condition . ')';
return $this;
}
/**
* Appends a search condition to the existing {@link condition}.
* The search condition and the existing condition will be concatenated via the specified operator
* which defaults to 'AND'.
* The search condition is generated using the SQL LIKE operator with the given column name and
* search keyword.
* @param string $column the column name (or a valid SQL expression)
* @param string $keyword the search keyword. This interpretation of the keyword is affected by the next parameter.
* @param boolean $escape whether the keyword should be escaped if it contains characters % or _.
* When this parameter is true (default), the special characters % (matches 0 or more characters)
* and _ (matches a single character) will be escaped, and the keyword will be surrounded with a %
* character on both ends. When this parameter is false, the keyword will be directly used for
* matching without any change.
* @param string $operator the operator used to concatenate the new condition with the existing one.
* Defaults to 'AND'.
* @param string $like the LIKE operator. Defaults to 'LIKE'. You may also set this to be 'NOT LIKE'.
* @return Query the criteria object itself
* @since 1.0.10
*/
public function addSearchCondition($column, $keyword, $escape = true, $operator = 'AND', $like = 'LIKE')
{
if ($keyword == '')
return $this;
if ($escape)
$keyword = '%' . strtr($keyword, array('%' => '\%', '_' => '\_', '\\' => '\\\\')) . '%';
$condition = $column . " $like " . self::PARAM_PREFIX . self::$paramCount;
$this->params[self::PARAM_PREFIX . self::$paramCount++] = $keyword;
return $this->addCondition($condition, $operator);
}
/**
* Appends an IN condition to the existing {@link condition}.
* The IN condition and the existing condition will be concatenated via the specified operator
* which defaults to 'AND'.
* The IN condition is generated by using the SQL IN operator which requires the specified
* column value to be among the given list of values.
* @param string $column the column name (or a valid SQL expression)
* @param array $values list of values that the column value should be in
* @param string $operator the operator used to concatenate the new condition with the existing one.
* Defaults to 'AND'.
* @return Query the criteria object itself
* @since 1.0.10
*/
public function addInCondition($column, $values, $operator = 'AND')
{
if (($n = count($values)) < 1)
return $this->addCondition('0=1', $operator); // 0=1 is used because in MSSQL value alone can't be used in WHERE
if ($n === 1)
{
$value = reset($values);
if ($value === null)
return $this->addCondition($column . ' IS NULL');
$condition = $column . '=' . self::PARAM_PREFIX . self::$paramCount;
$this->params[self::PARAM_PREFIX . self::$paramCount++] = $value;
}
else
{
$params = array();
foreach ($values as $value)
{
$params[] = self::PARAM_PREFIX . self::$paramCount;
$this->params[self::PARAM_PREFIX . self::$paramCount++] = $value;
}
$condition = $column . ' IN (' . implode(', ', $params) . ')';
}
return $this->addCondition($condition, $operator);
}
/**
* Appends an NOT IN condition to the existing {@link condition}.
* The NOT IN condition and the existing condition will be concatenated via the specified operator
* which defaults to 'AND'.
* The NOT IN condition is generated by using the SQL NOT IN operator which requires the specified
* column value to be among the given list of values.
* @param string $column the column name (or a valid SQL expression)
* @param array $values list of values that the column value should not be in
* @param string $operator the operator used to concatenate the new condition with the existing one.
* Defaults to 'AND'.
* @return Query the criteria object itself
* @since 1.1.1
*/
public function addNotInCondition($column, $values, $operator = 'AND')
{
if (($n = count($values)) < 1)
return $this;
if ($n === 1)
{
$value = reset($values);
if ($value === null)
return $this->addCondition($column . ' IS NOT NULL');
$condition = $column . '!=' . self::PARAM_PREFIX . self::$paramCount;
$this->params[self::PARAM_PREFIX . self::$paramCount++] = $value;
}
else
{
$params = array();
foreach ($values as $value)
{
$params[] = self::PARAM_PREFIX . self::$paramCount;
$this->params[self::PARAM_PREFIX . self::$paramCount++] = $value;
}
$condition = $column . ' NOT IN (' . implode(', ', $params) . ')';
}
return $this->addCondition($condition, $operator);
}
/**
* Appends a condition for matching the given list of column values.
* The generated condition will be concatenated to the existing {@link condition}
* via the specified operator which defaults to 'AND'.
* The condition is generated by matching each column and the corresponding value.
* @param array $columns list of column names and values to be matched (name=>value)
* @param string $columnOperator the operator to concatenate multiple column matching condition. Defaults to 'AND'.
* @param string $operator the operator used to concatenate the new condition with the existing one.
* Defaults to 'AND'.
* @return Query the criteria object itself
* @since 1.0.10
*/
public function addColumnCondition($columns, $columnOperator = 'AND', $operator = 'AND')
{
$params = array();
foreach ($columns as $name => $value)
{
if ($value === null)
$params[] = $name . ' IS NULL';
else
{
$params[] = $name . '=' . self::PARAM_PREFIX . self::$paramCount;
$this->params[self::PARAM_PREFIX . self::$paramCount++] = $value;
}
}
return $this->addCondition(implode(" $columnOperator ", $params), $operator);
}
/**
* Adds a comparison expression to the {@link condition} property.
*
* This method is a helper that appends to the {@link condition} property
* with a new comparison expression. The comparison is done by comparing a column
* with the given value using some comparison operator.
*
* The comparison operator is intelligently determined based on the first few
* characters in the given value. In particular, it recognizes the following operators
* if they appear as the leading characters in the given value:
* <ul>
* <li><code>&lt;</code>: the column must be less than the given value.</li>
* <li><code>&gt;</code>: the column must be greater than the given value.</li>
* <li><code>&lt;=</code>: the column must be less than or equal to the given value.</li>
* <li><code>&gt;=</code>: the column must be greater than or equal to the given value.</li>
* <li><code>&lt;&gt;</code>: the column must not be the same as the given value.
* Note that when $partialMatch is true, this would mean the value must not be a substring
* of the column.</li>
* <li><code>=</code>: the column must be equal to the given value.</li>
* <li>none of the above: the column must be equal to the given value. Note that when $partialMatch
* is true, this would mean the value must be the same as the given value or be a substring of it.</li>
* </ul>
*
* Note that any surrounding white spaces will be removed from the value before comparison.
* When the value is empty, no comparison expression will be added to the search condition.
*
* @param string $column the name of the column to be searched
* @param mixed $value the column value to be compared with. If the value is a string, the aforementioned
* intelligent comparison will be conducted. If the value is an array, the comparison is done
* by exact match of any of the value in the array. If the string or the array is empty,
* the existing search condition will not be modified.
* @param boolean $partialMatch whether the value should consider partial text match (using LIKE and NOT LIKE operators).
* Defaults to false, meaning exact comparison.
* @param string $operator the operator used to concatenate the new condition with the existing one.
* Defaults to 'AND'.
* @param boolean $escape whether the value should be escaped if $partialMatch is true and
* the value contains characters % or _. When this parameter is true (default),
* the special characters % (matches 0 or more characters)
* and _ (matches a single character) will be escaped, and the value will be surrounded with a %
* character on both ends. When this parameter is false, the value will be directly used for
* matching without any change.
* @return Query the criteria object itself
* @since 1.1.1
*/
public function compare($column, $value, $partialMatch = false, $operator = 'AND', $escape = true)
{
if (is_array($value))
{
if ($value === array())
return $this;
return $this->addInCondition($column, $value, $operator);
}
else
$value = "$value";
if (preg_match('/^(?:\s*(<>|<=|>=|<|>|=))?(.*)$/', $value, $matches))
{
$value = $matches[2];
$op = $matches[1];
}
else
$op = '';
if ($value === '')
return $this;
if ($partialMatch)
{
if ($op === '')
return $this->addSearchCondition($column, $value, $escape, $operator);
if ($op === '<>')
return $this->addSearchCondition($column, $value, $escape, $operator, 'NOT LIKE');
}
elseif ($op === '')
$op = '=';
$this->addCondition($column . $op . self::PARAM_PREFIX . self::$paramCount, $operator);
$this->params[self::PARAM_PREFIX . self::$paramCount++] = $value;
return $this;
}
/**
* Adds a between condition to the {@link condition} property.
*
* The new between condition and the existing condition will be concatenated via
* the specified operator which defaults to 'AND'.
* If one or both values are empty then the condition is not added to the existing condition.
* This method handles the case when the existing condition is empty.
* After calling this method, the {@link condition} property will be modified.
* @param string $column the name of the column to search between.
* @param string $valueStart the beginning value to start the between search.
* @param string $valueEnd the ending value to end the between search.
* @param string $operator the operator used to concatenate the new condition with the existing one.
* Defaults to 'AND'.
* @return Query the criteria object itself
* @since 1.1.2
*/
public function addBetweenCondition($column, $valueStart, $valueEnd, $operator = 'AND')
{
if ($valueStart === '' || $valueEnd === '')
return $this;
$paramStart = self::PARAM_PREFIX . self::$paramCount++;
$paramEnd = self::PARAM_PREFIX . self::$paramCount++;
$this->params[$paramStart] = $valueStart;
$this->params[$paramEnd] = $valueEnd;
$condition = "$column BETWEEN $paramStart AND $paramEnd";
if ($this->condition === '')
$this->condition = $condition;
else
$this->condition = '(' . $this->condition . ') ' . $operator . ' (' . $condition . ')';
return $this;
}
/**
* Merges with another criteria.
* In general, the merging makes the resulting criteria more restrictive.
* For example, if both criterias have conditions, they will be 'AND' together.
* Also, the criteria passed as the parameter takes precedence in case
* two options cannot be merged (e.g. LIMIT, OFFSET).
* @param Query $criteria the criteria to be merged with.
* @param boolean $useAnd whether to use 'AND' to merge condition and having options.
* If false, 'OR' will be used instead. Defaults to 'AND'. This parameter has been
* available since version 1.0.6.
* @since 1.0.5
*/
public function mergeWith($criteria, $useAnd = true)
{
$and = $useAnd ? 'AND' : 'OR';
if (is_array($criteria))
$criteria = new self($criteria);
if ($this->select !== $criteria->select)
{
if ($this->select === '*')
$this->select = $criteria->select;
elseif ($criteria->select !== '*')
{
$select1 = is_string($this->select) ? preg_split('/\s*,\s*/', trim($this->select), -1, PREG_SPLIT_NO_EMPTY) : $this->select;
$select2 = is_string($criteria->select) ? preg_split('/\s*,\s*/', trim($criteria->select), -1, PREG_SPLIT_NO_EMPTY) : $criteria->select;
$this->select = array_merge($select1, array_diff($select2, $select1));
}
}
if ($this->condition !== $criteria->condition)
{
if ($this->condition === '')
$this->condition = $criteria->condition;
elseif ($criteria->condition !== '')
$this->condition = "( {$this->condition}) $and ( {$criteria->condition})";
}
if ($this->params !== $criteria->params)
$this->params = array_merge($this->params, $criteria->params);
if ($criteria->limit > 0)
$this->limit = $criteria->limit;
if ($criteria->offset >= 0)
$this->offset = $criteria->offset;
if ($criteria->alias !== null)
$this->alias = $criteria->alias;
if ($this->order !== $criteria->order)
{
if ($this->order === '')
$this->order = $criteria->order;
elseif ($criteria->order !== '')
$this->order = $criteria->order . ', ' . $this->order;
}
if ($this->group !== $criteria->group)
{
if ($this->group === '')
$this->group = $criteria->group;
elseif ($criteria->group !== '')
$this->group .= ', ' . $criteria->group;
}
if ($this->join !== $criteria->join)
{
if ($this->join === '')
$this->join = $criteria->join;
elseif ($criteria->join !== '')
$this->join .= ' ' . $criteria->join;
}
if ($this->having !== $criteria->having)
{
if ($this->having === '')
$this->having = $criteria->having;
elseif ($criteria->having !== '')
$this->having = "( {$this->having}) $and ( {$criteria->having})";
}
if ($criteria->distinct > 0)
$this->distinct = $criteria->distinct;
if ($criteria->together !== null)
$this->together = $criteria->together;
if ($criteria->index !== null)
$this->index = $criteria->index;
if (empty($this->scopes))
$this->scopes = $criteria->scopes;
elseif (!empty($criteria->scopes))
{
$scopes1 = (array)$this->scopes;
$scopes2 = (array)$criteria->scopes;
foreach ($scopes1 as $k => $v)
{
if (is_integer($k))
$scopes[] = $v;
elseif (isset($scopes2[$k]))
$scopes[] = array($k => $v);
else
$scopes[$k] = $v;
}
foreach ($scopes2 as $k => $v)
{
if (is_integer($k))
$scopes[] = $v;
elseif (isset($scopes1[$k]))
$scopes[] = array($k => $v);
else
$scopes[$k] = $v;
}
$this->scopes = $scopes;
}
if (empty($this->with))
$this->with = $criteria->with;
elseif (!empty($criteria->with))
{
$this->with = (array)$this->with;
foreach ((array)$criteria->with as $k => $v)
{
if (is_integer($k))
$this->with[] = $v;
elseif (isset($this->with[$k]))
{
$excludes = array();
foreach (array('joinType', 'on') as $opt)
{
if (isset($this->with[$k][$opt]))
$excludes[$opt] = $this->with[$k][$opt];
if (isset($v[$opt]))
$excludes[$opt] = ($opt === 'on' && isset($excludes[$opt]) && $v[$opt] !== $excludes[$opt]) ?
"($excludes[$opt]) AND $v[$opt]" : $v[$opt];
unset($this->with[$k][$opt]);
unset($v[$opt]);
}
$this->with[$k] = new self($this->with[$k]);
$this->with[$k]->mergeWith($v, $useAnd);
$this->with[$k] = $this->with[$k]->toArray();
if (count($excludes) !== 0)
$this->with[$k] = CMap::mergeArray($this->with[$k], $excludes);
}
else
$this->with[$k] = $v;
}
}
}
/**
* @return array the array representation of the criteria
* @since 1.0.6
*/
public function toArray()
{
$result = array();
foreach (array('select', 'condition', 'params', 'limit', 'offset', 'order', 'group', 'join', 'having', 'distinct', 'scopes', 'with', 'alias', 'index', 'together') as $name)
$result[$name] = $this->$name;
return $result;
}
}

402
framework/db/dao/QueryBuilder.php
Unescape View File

@ -0,0 +1,402 @@
<?php
/**
* This file contains the Command class.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2012 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\dao;
/**
* QueryBuilder builds a SQL statement based on the specification given as a [[Query]] object.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class QueryBuilder extends \yii\base\Component
{
private $_connection;
public function __construct(Connection $connection)
{
$this->_connection = $connection;
}
/**
* @return CDbConnection the connection associated with this command
*/
public function getConnection()
{
return $this->_connection;
}
public function build($query)
{
$clauses = array(
$this->buildSelect($query->select, $query->distinct),
$this->buildFrom($query->from),
$this->buildJoin($query->join),
$this->buildWhere($query->where),
$this->buildGroupBy($query->groupBy),
$this->buildHaving($query->having),
$this->buildOrderBy($query->orderBy),
$this->buildLimit($query->offset, $query->limit),
$this->buildUnion($query->union),
);
return implode("\n", array_filter($clauses));
}
protected function buildSelect($columns, $distinct)
{
$select = $distinct ? 'SELECT DISTINCT' : 'SELECT';
if (empty($columns)) {
return $select . ' *';
}
if (is_string($columns)) {
if (strpos($columns, '(') !== false) {
return $select . ' ' . $columns;
}
$columns = preg_split('/\s*,\s*/', trim($columns), -1, PREG_SPLIT_NO_EMPTY);
}
foreach ($columns as $i => $column) {
if (is_object($column)) {
$columns[$i] = (string)$column;
}
elseif (strpos($column, '(') === false) {
if (preg_match('/^(.*?)(?i:\s+as\s+|\s+)(.*)$/', $column, $matches)) {
$columns[$i] = $this->_connection->quoteColumnName($matches[1]) . ' AS ' . $this->_connection->quoteColumnName($matches[2]);
}
else {
$columns[$i] = $this->_connection->quoteColumnName($column);
}
}
}
return $select . ' ' . implode(', ', $columns);
}
protected function buildFrom($tables)
{
if (is_string($tables) && strpos($tables, '(') !== false) {
return $tables;
}
if (!is_array($tables)) {
$tables = preg_split('/\s*,\s*/', trim($tables), -1, PREG_SPLIT_NO_EMPTY);
}
foreach ($tables as $i => $table) {
if (strpos($table, '(') === false) {
if (preg_match('/^(.*?)(?i:\s+as\s+|\s+)(.*)$/', $table, $matches)) { // with alias
$tables[$i] = $this->_connection->quoteTableName($matches[1]) . ' ' . $this->_connection->quoteTableName($matches[2]);
}
else {
$tables[$i] = $this->_connection->quoteTableName($table);
}
}
}
return implode(', ', $tables);
}
$this->buildJoin($query->join),
$this->buildWhere($query->where),
$this->buildGroupBy($query->groupBy),
$this->buildHaving($query->having),
$this->buildOrderBy($query->orderBy),
$this->buildLimit($query->offset, $query->limit),
if (isset($query['union']))
$sql .= "\nUNION (\n" . (is_array($query['union']) ? implode("\n) UNION (\n", $query['union']) : $query['union']) . ')';
return $sql;
}
/**
* Sets the WHERE part of the query.
*
* The method requires a $conditions parameter, and optionally a $params parameter
* specifying the values to be bound to the query.
*
* The $conditions parameter should be either a string (e.g. 'id=1') or an array.
* If the latter, it must be of the format <code>array(operator, operand1, operand2, ...)</code>,
* where the operator can be one of the followings, and the possible operands depend on the corresponding
* operator:
* <ul>
* <li><code>and</code>: the operands should be concatenated together using AND. For example,
* array('and', 'id=1', 'id=2') will generate 'id=1 AND id=2'. If an operand is an array,
* it will be converted into a string using the same rules described here. For example,
* array('and', 'type=1', array('or', 'id=1', 'id=2')) will generate 'type=1 AND (id=1 OR id=2)'.
* The method will NOT do any quoting or escaping.</li>
* <li><code>or</code>: similar as the <code>and</code> operator except that the operands are concatenated using OR.</li>
* <li><code>in</code>: operand 1 should be a column or DB expression, and operand 2 be an array representing
* the range of the values that the column or DB expression should be in. For example,
* array('in', 'id', array(1,2,3)) will generate 'id IN (1,2,3)'.
* The method will properly quote the column name and escape values in the range.</li>
* <li><code>not in</code>: similar as the <code>in</code> operator except that IN is replaced with NOT IN in the generated condition.</li>
* <li><code>like</code>: operand 1 should be a column or DB expression, and operand 2 be a string or an array representing
* the values that the column or DB expression should be like.
* For example, array('like', 'name', '%tester%') will generate "name LIKE '%tester%'".
* When the value range is given as an array, multiple LIKE predicates will be generated and concatenated using AND.
* For example, array('like', 'name', array('%test%', '%sample%')) will generate
* "name LIKE '%test%' AND name LIKE '%sample%'".
* The method will properly quote the column name and escape values in the range.</li>
* <li><code>not like</code>: similar as the <code>like</code> operator except that LIKE is replaced with NOT LIKE in the generated condition.</li>
* <li><code>or like</code>: similar as the <code>like</code> operator except that OR is used to concatenated the LIKE predicates.</li>
* <li><code>or not like</code>: similar as the <code>not like</code> operator except that OR is used to concatenated the NOT LIKE predicates.</li>
* </ul>
* @param mixed $conditions the conditions that should be put in the WHERE part.
* @param array $params the parameters (name=>value) to be bound to the query
* @return Command the command object itself
* @since 1.1.6
*/
public function where($conditions, $params = array())
{
$this->_query['where'] = $this->processConditions($conditions);
foreach ($params as $name => $value)
$this->params[$name] = $value;
return $this;
}
/**
* Appends an INNER JOIN part to the query.
* @param string $table the table to be joined.
* Table name can contain schema prefix (e.g. 'public.tbl_user') and/or table alias (e.g. 'tbl_user u').
* The method will automatically quote the table name unless it contains some parenthesis
* (which means the table is given as a sub-query or DB expression).
* @param mixed $conditions the join condition that should appear in the ON part.
* Please refer to {@link where} on how to specify conditions.
* @param array $params the parameters (name=>value) to be bound to the query
* @return Command the command object itself
* @since 1.1.6
*/
public function join($table, $conditions, $params = array())
{
return $this->joinInternal('join', $table, $conditions, $params);
}
/**
* Sets the GROUP BY part of the query.
* @param mixed $columns the columns to be grouped by.
* Columns can be specified in either a string (e.g. "id, name") or an array (e.g. array('id', 'name')).
* The method will automatically quote the column names unless a column contains some parenthesis
* (which means the column contains a DB expression).
* @return Command the command object itself
* @since 1.1.6
*/
public function group($columns)
{
if (is_string($columns) && strpos($columns, '(') !== false)
$this->_query['group'] = $columns;
else
{
if (!is_array($columns))
$columns = preg_split('/\s*,\s*/', trim($columns), -1, PREG_SPLIT_NO_EMPTY);
foreach ($columns as $i => $column)
{
if (is_object($column))
$columns[$i] = (string)$column;
elseif (strpos($column, '(') === false)
$columns[$i] = $this->_connection->quoteColumnName($column);
}
$this->_query['group'] = implode(', ', $columns);
}
return $this;
}
/**
* Sets the HAVING part of the query.
* @param mixed $conditions the conditions to be put after HAVING.
* Please refer to {@link where} on how to specify conditions.
* @param array $params the parameters (name=>value) to be bound to the query
* @return Command the command object itself
* @since 1.1.6
*/
public function having($conditions, $params = array())
{
$this->_query['having'] = $this->processConditions($conditions);
foreach ($params as $name => $value)
$this->params[$name] = $value;
return $this;
}
/**
* Sets the ORDER BY part of the query.
* @param mixed $columns the columns (and the directions) to be ordered by.
* Columns can be specified in either a string (e.g. "id ASC, name DESC") or an array (e.g. array('id ASC', 'name DESC')).
* The method will automatically quote the column names unless a column contains some parenthesis
* (which means the column contains a DB expression).
* @return Command the command object itself
* @since 1.1.6
*/
public function order($columns)
{
if (is_string($columns) && strpos($columns, '(') !== false)
$this->_query['order'] = $columns;
else
{
if (!is_array($columns))
$columns = preg_split('/\s*,\s*/', trim($columns), -1, PREG_SPLIT_NO_EMPTY);
foreach ($columns as $i => $column)
{
if (is_object($column))
$columns[$i] = (string)$column;
elseif (strpos($column, '(') === false)
{
if (preg_match('/^(.*?)\s+(asc|desc)$/i', $column, $matches))
$columns[$i] = $this->_connection->quoteColumnName($matches[1]) . ' ' . strtoupper($matches[2]);
else
$columns[$i] = $this->_connection->quoteColumnName($column);
}
}
$this->_query['order'] = implode(', ', $columns);
}
return $this;
}
/**
* Sets the LIMIT part of the query.
* @param integer $limit the limit
* @param integer $offset the offset
* @return Command the command object itself
* @since 1.1.6
*/
public function limit($limit, $offset = null)
{
$this->_query['limit'] = (int)$limit;
if ($offset !== null)
$this->offset($offset);
return $this;
}
/**
* Appends a SQL statement using UNION operator.
* @param string $sql the SQL statement to be appended using UNION
* @return Command the command object itself
* @since 1.1.6
*/
public function union($sql)
{
if (isset($this->_query['union']) && is_string($this->_query['union']))
$this->_query['union'] = array($this->_query['union']);
$this->_query['union'][] = $sql;
return $this;
}
/**
* Generates the condition string that will be put in the WHERE part
* @param mixed $conditions the conditions that will be put in the WHERE part.
* @return string the condition string to put in the WHERE part
*/
private function buildConditions($conditions)
{
if (!is_array($conditions))
return $conditions;
elseif ($conditions === array())
return '';
$n = count($conditions);
$operator = strtoupper($conditions[0]);
if ($operator === 'OR' || $operator === 'AND')
{
$parts = array();
for ($i = 1;$i < $n;++$i)
{
$condition = $this->processConditions($conditions[$i]);
if ($condition !== '')
$parts[] = '(' . $condition . ')';
}
return $parts === array() ? '' : implode(' ' . $operator . ' ', $parts);
}
if (!isset($conditions[1], $conditions[2]))
return '';
$column = $conditions[1];
if (strpos($column, '(') === false)
$column = $this->_connection->quoteColumnName($column);
$values = $conditions[2];
if (!is_array($values))
$values = array($values);
if ($operator === 'IN' || $operator === 'NOT IN')
{
if ($values === array())
return $operator === 'IN' ? '0=1' : '';
foreach ($values as $i => $value)
{
if (is_string($value))
$values[$i] = $this->_connection->quoteValue($value);
else
$values[$i] = (string)$value;
}
return $column . ' ' . $operator . ' (' . implode(', ', $values) . ')';
}
if ($operator === 'LIKE' || $operator === 'NOT LIKE' || $operator === 'OR LIKE' || $operator === 'OR NOT LIKE')
{
if ($values === array())
return $operator === 'LIKE' || $operator === 'OR LIKE' ? '0=1' : '';
if ($operator === 'LIKE' || $operator === 'NOT LIKE')
$andor = ' AND ';
else
{
$andor = ' OR ';
$operator = $operator === 'OR LIKE' ? 'LIKE' : 'NOT LIKE';
}
$expressions = array();
foreach ($values as $value)
$expressions[] = $column . ' ' . $operator . ' ' . $this->_connection->quoteValue($value);
return implode($andor, $expressions);
}
throw new CDbException(Yii::t('yii', 'Unknown operator "{operator}".', array('{operator}' => $operator)));
}
/**
* Appends an JOIN part to the query.
* @param string $type the join type ('join', 'left join', 'right join', 'cross join', 'natural join')
* @param string $table the table to be joined.
* Table name can contain schema prefix (e.g. 'public.tbl_user') and/or table alias (e.g. 'tbl_user u').
* The method will automatically quote the table name unless it contains some parenthesis
* (which means the table is given as a sub-query or DB expression).
* @param mixed $conditions the join condition that should appear in the ON part.
* Please refer to {@link where} on how to specify conditions.
* @param array $params the parameters (name=>value) to be bound to the query
* @return Command the command object itself
* @since 1.1.6
*/
private function joinInternal($type, $table, $conditions = '', $params = array())
{
if (strpos($table, '(') === false)
{
if (preg_match('/^(.*?)(?i:\s+as\s+|\s+)(.*)$/', $table, $matches)) // with alias
$table = $this->_connection->quoteTableName($matches[1]) . ' ' . $this->_connection->quoteTableName($matches[2]);
else
$table = $this->_connection->quoteTableName($table);
}
$conditions = $this->processConditions($conditions);
if ($conditions != '')
$conditions = ' ON ' . $conditions;
if (isset($this->_query['join']) && is_string($this->_query['join']))
$this->_query['join'] = array($this->_query['join']);
$this->_query['join'][] = strtoupper($type) . ' ' . $table . $conditions;
foreach ($params as $name => $value)
$this->params[$name] = $value;
return $this;
}
}

556
framework/db/dao/Schema.php
Unescape View File

@ -0,0 +1,556 @@
<?php
/**
* CDbSchema class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2011 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
/**
* CDbSchema is the base class for retrieving metadata information.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id: CDbSchema.php 3359 2011-07-18 11:25:17Z qiang.xue $
* @package system.db.schema
* @since 1.0
*/
abstract class CDbSchema extends CComponent
{
/**
* @var array the abstract column types mapped to physical column types.
* @since 1.1.6
*/
public $columnTypes = array();
private $_tableNames = array();
private $_tables = array();
private $_connection;
private $_builder;
private $_cacheExclude = array();
/**
* Loads the metadata for the specified table.
* @param string $name table name
* @return CDbTableSchema driver dependent table metadata, null if the table does not exist.
*/
abstract protected function loadTable($name);
/**
* Constructor.
* @param CDbConnection $conn database connection.
*/
public function __construct($conn)
{
$this->_connection = $conn;
foreach ($conn->schemaCachingExclude as $name)
$this->_cacheExclude[$name] = true;
}
/**
* @return CDbConnection database connection. The connection is active.
*/
public function getDbConnection()
{
return $this->_connection;
}
/**
* Obtains the metadata for the named table.
* @param string $name table name
* @return CDbTableSchema table metadata. Null if the named table does not exist.
*/
public function getTable($name)
{
if (isset($this->_tables[$name]))
return $this->_tables[$name];
else
{
if ($this->_connection->tablePrefix !== null && strpos($name, '{{') !== false)
$realName = preg_replace('/\{\{(.*?)\}\}/', $this->_connection->tablePrefix . '$1', $name);
else
$realName = $name;
// temporarily disable query caching
if ($this->_connection->queryCachingDuration > 0)
{
$qcDuration = $this->_connection->queryCachingDuration;
$this->_connection->queryCachingDuration = 0;
}
if (!isset($this->_cacheExclude[$name]) && ($duration = $this->_connection->schemaCachingDuration) > 0 && $this->_connection->schemaCacheID !== false && ($cache = Yii::app()->getComponent($this->_connection->schemaCacheID)) !== null)
{
$key = 'yii:dbschema' . $this->_connection->connectionString . ':' . $this->_connection->username . ':' . $name;
if (($table = $cache->get($key)) === false)
{
$table = $this->loadTable($realName);
if ($table !== null)
$cache->set($key, $table, $duration);
}
$this->_tables[$name] = $table;
}
else
$this->_tables[$name] = $table = $this->loadTable($realName);
if (isset($qcDuration)) // re-enable query caching
$this->_connection->queryCachingDuration = $qcDuration;
return $table;
}
}
/**
* Returns the metadata for all tables in the database.
* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
* @return array the metadata for all tables in the database.
* Each array element is an instance of {@link CDbTableSchema} (or its child class).
* The array keys are table names.
* @since 1.0.2
*/
public function getTables($schema = '')
{
$tables = array();
foreach ($this->getTableNames($schema) as $name)
{
if (($table = $this->getTable($name)) !== null)
$tables[$name] = $table;
}
return $tables;
}
/**
* Returns all table names in the database.
* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
* If not empty, the returned table names will be prefixed with the schema name.
* @return array all table names in the database.
* @since 1.0.2
*/
public function getTableNames($schema = '')
{
if (!isset($this->_tableNames[$schema]))
$this->_tableNames[$schema] = $this->findTableNames($schema);
return $this->_tableNames[$schema];
}
/**
* @return CDbCommandBuilder the SQL command builder for this connection.
*/
public function getCommandBuilder()
{
if ($this->_builder !== null)
return $this->_builder;
else
return $this->_builder = $this->createCommandBuilder();
}
/**
* Refreshes the schema.
* This method resets the loaded table metadata and command builder
* so that they can be recreated to reflect the change of schema.
*/
public function refresh()
{
if (($duration = $this->_connection->schemaCachingDuration) > 0 && $this->_connection->schemaCacheID !== false && ($cache = Yii::app()->getComponent($this->_connection->schemaCacheID)) !== null)
{
foreach (array_keys($this->_tables) as $name)
{
if (!isset($this->_cacheExclude[$name]))
{
$key = 'yii:dbschema' . $this->_connection->connectionString . ':' . $this->_connection->username . ':' . $name;
$cache->delete($key);
}
}
}
$this->_tables = array();
$this->_tableNames = array();
$this->_builder = null;
}
/**
* Quotes a table name for use in a query.
* If the table name contains schema prefix, the prefix will also be properly quoted.
* @param string $name table name
* @return string the properly quoted table name
* @see quoteSimpleTableName
*/
public function quoteTableName($name)
{
if (strpos($name, '.') === false)
return $this->quoteSimpleTableName($name);
$parts = explode('.', $name);
foreach ($parts as $i => $part)
$parts[$i] = $this->quoteSimpleTableName($part);
return implode('.', $parts);
}
/**
* Quotes a simple table name for use in a query.
* A simple table name does not schema prefix.
* @param string $name table name
* @return string the properly quoted table name
* @since 1.1.6
*/
public function quoteSimpleTableName($name)
{
return "'" . $name . "'";
}
/**
* Quotes a column name for use in a query.
* If the column name contains prefix, the prefix will also be properly quoted.
* @param string $name column name
* @return string the properly quoted column name
* @see quoteSimpleColumnName
*/
public function quoteColumnName($name)
{
if (($pos = strrpos($name, '.')) !== false)
{
$prefix = $this->quoteTableName(substr($name, 0, $pos)) . '.';
$name = substr($name, $pos + 1);
}
else
$prefix = '';
return $prefix . ($name === '*' ? $name : $this->quoteSimpleColumnName($name));
}
/**
* Quotes a simple column name for use in a query.
* A simple column name does not contain prefix.
* @param string $name column name
* @return string the properly quoted column name
* @since 1.1.6
*/
public function quoteSimpleColumnName($name)
{
return '"' . $name . '"';
}
/**
* Compares two table names.
* The table names can be either quoted or unquoted. This method
* will consider both cases.
* @param string $name1 table name 1
* @param string $name2 table name 2
* @return boolean whether the two table names refer to the same table.
*/
public function compareTableNames($name1, $name2)
{
$name1 = str_replace(array('"', '`', "'"), '', $name1);
$name2 = str_replace(array('"', '`', "'"), '', $name2);
if (($pos = strrpos($name1, '.')) !== false)
$name1 = substr($name1, $pos + 1);
if (($pos = strrpos($name2, '.')) !== false)
$name2 = substr($name2, $pos + 1);
if ($this->_connection->tablePrefix !== null)
{
if (strpos($name1, '{') !== false)
$name1 = $this->_connection->tablePrefix . str_replace(array('{', '}'), '', $name1);
if (strpos($name2, '{') !== false)
$name2 = $this->_connection->tablePrefix . str_replace(array('{', '}'), '', $name2);
}
return $name1 === $name2;
}
/**
* Resets the sequence value of a table's primary key.
* The sequence will be reset such that the primary key of the next new row inserted
* will have the specified value or 1.
* @param CDbTableSchema $table the table schema whose primary key sequence will be reset
* @param mixed $value the value for the primary key of the next new row inserted. If this is not set,
* the next new row's primary key will have a value 1.
* @since 1.1
*/
public function resetSequence($table, $value = null)
{
}
/**
* Enables or disables integrity check.
* @param boolean $check whether to turn on or off the integrity check.
* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
* @since 1.1
*/
public function checkIntegrity($check = true, $schema = '')
{
}
/**
* Creates a command builder for the database.
* This method may be overridden by child classes to create a DBMS-specific command builder.
* @return CDbCommandBuilder command builder instance
*/
protected function createCommandBuilder()
{
return new CDbCommandBuilder($this);
}
/**
* Returns all table names in the database.
* This method should be overridden by child classes in order to support this feature
* because the default implementation simply throws an exception.
* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
* If not empty, the returned table names will be prefixed with the schema name.
* @return array all table names in the database.
* @since 1.0.2
*/
protected function findTableNames($schema = '')
{
throw new CDbException(Yii::t('yii', '{class} does not support fetching all table names.',
array('{class}' => get_class($this))));
}
/**
* Converts an abstract column type into a physical column type.
* The conversion is done using the type map specified in {@link columnTypes}.
* These abstract column types are supported (using MySQL as example to explain the corresponding
* physical types):
* <ul>
* <li>pk: an auto-incremental primary key type, will be converted into "int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY"</li>
* <li>string: string type, will be converted into "varchar(255)"</li>
* <li>text: a long string type, will be converted into "text"</li>
* <li>integer: integer type, will be converted into "int(11)"</li>
* <li>boolean: boolean type, will be converted into "tinyint(1)"</li>
* <li>float: float number type, will be converted into "float"</li>
* <li>decimal: decimal number type, will be converted into "decimal"</li>
* <li>datetime: datetime type, will be converted into "datetime"</li>
* <li>timestamp: timestamp type, will be converted into "timestamp"</li>
* <li>time: time type, will be converted into "time"</li>
* <li>date: date type, will be converted into "date"</li>
* <li>binary: binary data type, will be converted into "blob"</li>
* </ul>
*
* If the abstract type contains two or more parts separated by spaces (e.g. "string NOT NULL"), then only
* the first part will be converted, and the rest of the parts will be appended to the conversion result.
* For example, 'string NOT NULL' is converted to 'varchar(255) NOT NULL'.
* @param string $type abstract column type
* @return string physical column type.
* @since 1.1.6
*/
public function getColumnType($type)
{
if (isset($this->columnTypes[$type]))
return $this->columnTypes[$type];
elseif (($pos = strpos($type, ' ')) !== false)
{
$t = substr($type, 0, $pos);
return (isset($this->columnTypes[$t]) ? $this->columnTypes[$t] : $t) . substr($type, $pos);
}
else
return $type;
}
/**
* Builds a SQL statement for creating a new DB table.
*
* The columns in the new table should be specified as name-definition pairs (e.g. 'name'=>'string'),
* where name stands for a column name which will be properly quoted by the method, and definition
* stands for the column type which can contain an abstract DB type.
* The {@link getColumnType} method will be invoked to convert any abstract type into a physical one.
*
* If a column is specified with definition only (e.g. 'PRIMARY KEY (name, type)'), it will be directly
* inserted into the generated SQL.
*
* @param string $table the name of the table to be created. The name will be properly quoted by the method.
* @param array $columns the columns (name=>definition) in the new table.
* @param string $options additional SQL fragment that will be appended to the generated SQL.
* @return string the SQL statement for creating a new DB table.
* @since 1.1.6
*/
public function createTable($table, $columns, $options = null)
{
$cols = array();
foreach ($columns as $name => $type)
{
if (is_string($name))
$cols[] = "\t" . $this->quoteColumnName($name) . ' ' . $this->getColumnType($type);
else
$cols[] = "\t" . $type;
}
$sql = "CREATE TABLE " . $this->quoteTableName($table) . " (\n" . implode(",\n", $cols) . "\n)";
return $options === null ? $sql : $sql . ' ' . $options;
}
/**
* Builds a SQL statement for renaming a DB table.
* @param string $table the table to be renamed. The name will be properly quoted by the method.
* @param string $newName the new table name. The name will be properly quoted by the method.
* @return string the SQL statement for renaming a DB table.
* @since 1.1.6
*/
public function renameTable($table, $newName)
{
return 'RENAME TABLE ' . $this->quoteTableName($table) . ' TO ' . $this->quoteTableName($newName);
}
/**
* Builds a SQL statement for dropping a DB table.
* @param string $table the table to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping a DB table.
* @since 1.1.6
*/
public function dropTable($table)
{
return "DROP TABLE " . $this->quoteTableName($table);
}
/**
* Builds a SQL statement for truncating a DB table.
* @param string $table the table to be truncated. The name will be properly quoted by the method.
* @return string the SQL statement for truncating a DB table.
* @since 1.1.6
*/
public function truncateTable($table)
{
return "TRUNCATE TABLE " . $this->quoteTableName($table);
}
/**
* Builds a SQL statement for adding a new DB column.
* @param string $table the table that the new column will be added to. The table name will be properly quoted by the method.
* @param string $column the name of the new column. The name will be properly quoted by the method.
* @param string $type the column type. The {@link getColumnType} method will be invoked to convert abstract column type (if any)
* into the physical one. Anything that is not recognized as abstract type will be kept in the generated SQL.
* For example, 'string' will be turned into 'varchar(255)', while 'string not null' will become 'varchar(255) not null'.
* @return string the SQL statement for adding a new column.
* @since 1.1.6
*/
public function addColumn($table, $column, $type)
{
return 'ALTER TABLE ' . $this->quoteTableName($table)
. ' ADD ' . $this->quoteColumnName($column) . ' '
. $this->getColumnType($type);
}
/**
* Builds a SQL statement for dropping a DB column.
* @param string $table the table whose column is to be dropped. The name will be properly quoted by the method.
* @param string $column the name of the column to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping a DB column.
* @since 1.1.6
*/
public function dropColumn($table, $column)
{
return "ALTER TABLE " . $this->quoteTableName($table)
. " DROP COLUMN " . $this->quoteColumnName($column);
}
/**
* Builds a SQL statement for renaming a column.
* @param string $table the table whose column is to be renamed. The name will be properly quoted by the method.
* @param string $name the old name of the column. The name will be properly quoted by the method.
* @param string $newName the new name of the column. The name will be properly quoted by the method.
* @return string the SQL statement for renaming a DB column.
* @since 1.1.6
*/
public function renameColumn($table, $name, $newName)
{
return "ALTER TABLE " . $this->quoteTableName($table)
. " RENAME COLUMN " . $this->quoteColumnName($name)
. " TO " . $this->quoteColumnName($newName);
}
/**
* Builds a SQL statement for changing the definition of a column.
* @param string $table the table whose column is to be changed. The table name will be properly quoted by the method.
* @param string $column the name of the column to be changed. The name will be properly quoted by the method.
* @param string $type the new column type. The {@link getColumnType} method will be invoked to convert abstract column type (if any)
* into the physical one. Anything that is not recognized as abstract type will be kept in the generated SQL.
* For example, 'string' will be turned into 'varchar(255)', while 'string not null' will become 'varchar(255) not null'.
* @return string the SQL statement for changing the definition of a column.
* @since 1.1.6
*/
public function alterColumn($table, $column, $type)
{
return 'ALTER TABLE ' . $this->quoteTableName($table) . ' CHANGE '
. $this->quoteColumnName($column) . ' '
. $this->quoteColumnName($column) . ' '
. $this->getColumnType($type);
}
/**
* Builds a SQL statement for adding a foreign key constraint to an existing table.
* The method will properly quote the table and column names.
* @param string $name the name of the foreign key constraint.
* @param string $table the table that the foreign key constraint will be added to.
* @param string $columns the name of the column to that the constraint will be added on. If there are multiple columns, separate them with commas.
* @param string $refTable the table that the foreign key references to.
* @param string $refColumns the name of the column that the foreign key references to. If there are multiple columns, separate them with commas.
* @param string $delete the ON DELETE option. Most DBMS support these options: RESTRICT, CASCADE, NO ACTION, SET DEFAULT, SET NULL
* @param string $update the ON UPDATE option. Most DBMS support these options: RESTRICT, CASCADE, NO ACTION, SET DEFAULT, SET NULL
* @return string the SQL statement for adding a foreign key constraint to an existing table.
* @since 1.1.6
*/
public function addForeignKey($name, $table, $columns, $refTable, $refColumns, $delete = null, $update = null)
{
$columns = preg_split('/\s*,\s*/', $columns, -1, PREG_SPLIT_NO_EMPTY);
foreach ($columns as $i => $col)
$columns[$i] = $this->quoteColumnName($col);
$refColumns = preg_split('/\s*,\s*/', $refColumns, -1, PREG_SPLIT_NO_EMPTY);
foreach ($refColumns as $i => $col)
$refColumns[$i] = $this->quoteColumnName($col);
$sql = 'ALTER TABLE ' . $this->quoteTableName($table)
. ' ADD CONSTRAINT ' . $this->quoteColumnName($name)
. ' FOREIGN KEY (' . implode(', ', $columns) . ')'
. ' REFERENCES ' . $this->quoteTableName($refTable)
. ' (' . implode(', ', $refColumns) . ')';
if ($delete !== null)
$sql .= ' ON DELETE ' . $delete;
if ($update !== null)
$sql .= ' ON UPDATE ' . $update;
return $sql;
}
/**
* Builds a SQL statement for dropping a foreign key constraint.
* @param string $name the name of the foreign key constraint to be dropped. The name will be properly quoted by the method.
* @param string $table the table whose foreign is to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping a foreign key constraint.
* @since 1.1.6
*/
public function dropForeignKey($name, $table)
{
return 'ALTER TABLE ' . $this->quoteTableName($table)
. ' DROP CONSTRAINT ' . $this->quoteColumnName($name);
}
/**
* Builds a SQL statement for creating a new index.
* @param string $name the name of the index. The name will be properly quoted by the method.
* @param string $table the table that the new index will be created for. The table name will be properly quoted by the method.
* @param string $column the column(s) that should be included in the index. If there are multiple columns, please separate them
* by commas. Each column name will be properly quoted by the method, unless a parenthesis is found in the name.
* @param boolean $unique whether to add UNIQUE constraint on the created index.
* @return string the SQL statement for creating a new index.
* @since 1.1.6
*/
public function createIndex($name, $table, $column, $unique = false)
{
$cols = array();
$columns = preg_split('/\s*,\s*/', $column, -1, PREG_SPLIT_NO_EMPTY);
foreach ($columns as $col)
{
if (strpos($col, '(') !== false)
$cols[] = $col;
else
$cols[] = $this->quoteColumnName($col);
}
return ($unique ? 'CREATE UNIQUE INDEX ' : 'CREATE INDEX ')
. $this->quoteTableName($name) . ' ON '
. $this->quoteTableName($table) . ' (' . implode(', ', $cols) . ')';
}
/**
* Builds a SQL statement for dropping an index.
* @param string $name the name of the index to be dropped. The name will be properly quoted by the method.
* @param string $table the table whose index is to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping an index.
* @since 1.1.6
*/
public function dropIndex($name, $table)
{
return 'DROP INDEX ' . $this->quoteTableName($name) . ' ON ' . $this->quoteTableName($table);
}
}

76
framework/db/dao/TableSchema.php
Unescape View File

@ -0,0 +1,76 @@
<?php
/**
* CDbTableSchema class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2011 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
/**
* CDbTableSchema is the base class for representing the metadata of a database table.
*
* It may be extended by different DBMS driver to provide DBMS-specific table metadata.
*
* CDbTableSchema provides the following information about a table:
* <ul>
* <li>{@link name}</li>
* <li>{@link rawName}</li>
* <li>{@link columns}</li>
* <li>{@link primaryKey}</li>
* <li>{@link foreignKeys}</li>
* <li>{@link sequenceName}</li>
* </ul>
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id: CDbTableSchema.php 2799 2011-01-01 19:31:13Z qiang.xue $
* @package system.db.schema
* @since 1.0
*/
class CDbTableSchema extends CComponent
{
/**
* @var string name of this table.
*/
public $name;
/**
* @var string raw name of this table. This is the quoted version of table name with optional schema name. It can be directly used in SQLs.
*/
public $rawName;
/**
* @var string|array primary key name of this table. If composite key, an array of key names is returned.
*/
public $primaryKey;
/**
* @var string sequence name for the primary key. Null if no sequence.
*/
public $sequenceName;
/**
* @var array foreign keys of this table. The array is indexed by column name. Each value is an array of foreign table name and foreign column name.
*/
public $foreignKeys = array();
/**
* @var array column metadata of this table. Each array element is a CDbColumnSchema object, indexed by column names.
*/
public $columns = array();
/**
* Gets the named column metadata.
* This is a convenient method for retrieving a named column even if it does not exist.
* @param string $name column name
* @return CDbColumnSchema metadata of the named column. Null if the named column does not exist.
*/
public function getColumn($name)
{
return isset($this->columns[$name]) ? $this->columns[$name] : null;
}
/**
* @return array list of column names
*/
public function getColumnNames()
{
return array_keys($this->columns);
}
}
Write Preview
Loading…
Cancel
Save