mirror of
https://github.com/yiisoft/yii2.git
synced 2025-11-04 06:37:55 +08:00
681db52ba6
- rename class to ColumnSchemaBuilder as this is more appropriate
- changed internal organisation to match how the rest of schema related classes work
- the ColumnSchemaBuilder is now created the same way as QueryBuilder is
- removed static call magic and method annotations, now real methods are called as they are
- the whole code works on objects in a db context now instead of setting database connection in global state
- trait is now used by Migration by default but can be used in other contexts as well
Migration usage is now as follows:
```php
$this->createTable('example_table', [
'id' => $this->primaryKey(),
'name' => $this->string(64)->notNull(),
'type' => $this->integer()->notNull()->defaultValue(10),
'description' => $this->text(),
'rule_name' => $this->string(64),
'data' => $this->text(),
'created_at' => $this->datetime()->notNull(),
'updated_at' => $this->datetime(),
]);
```
1305 lines
52 KiB
PHP
1305 lines
52 KiB
PHP
<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\db;
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use yii\base\InvalidParamException;
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use yii\base\NotSupportedException;
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/**
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* QueryBuilder builds a SELECT SQL statement based on the specification given as a [[Query]] object.
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*
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* QueryBuilder can also be used to build SQL statements such as INSERT, UPDATE, DELETE, CREATE TABLE,
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* from a [[Query]] object.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @since 2.0
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*/
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class QueryBuilder extends \yii\base\Object
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{
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/**
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* The prefix for automatically generated query binding parameters.
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*/
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const PARAM_PREFIX = ':qp';
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/**
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* @var Connection the database connection.
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*/
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public $db;
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/**
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* @var string the separator between different fragments of a SQL statement.
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* Defaults to an empty space. This is mainly used by [[build()]] when generating a SQL statement.
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*/
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public $separator = " ";
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/**
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* @var array the abstract column types mapped to physical column types.
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* This is mainly used to support creating/modifying tables using DB-independent data type specifications.
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* Child classes should override this property to declare supported type mappings.
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*/
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public $typeMap = [];
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/**
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* @var array map of query condition to builder methods.
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* These methods are used by [[buildCondition]] to build SQL conditions from array syntax.
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*/
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protected $conditionBuilders = [
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'NOT' => 'buildNotCondition',
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'AND' => 'buildAndCondition',
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'OR' => 'buildAndCondition',
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'BETWEEN' => 'buildBetweenCondition',
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'NOT BETWEEN' => 'buildBetweenCondition',
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'IN' => 'buildInCondition',
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'NOT IN' => 'buildInCondition',
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'LIKE' => 'buildLikeCondition',
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'NOT LIKE' => 'buildLikeCondition',
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'OR LIKE' => 'buildLikeCondition',
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'OR NOT LIKE' => 'buildLikeCondition',
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'EXISTS' => 'buildExistsCondition',
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'NOT EXISTS' => 'buildExistsCondition',
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];
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/**
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* Constructor.
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* @param Connection $connection the database connection.
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* @param array $config name-value pairs that will be used to initialize the object properties
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*/
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public function __construct($connection, $config = [])
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{
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$this->db = $connection;
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parent::__construct($config);
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}
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/**
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* Generates a SELECT SQL statement from a [[Query]] object.
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* @param Query $query the [[Query]] object from which the SQL statement will be generated.
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* @param array $params the parameters to be bound to the generated SQL statement. These parameters will
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* be included in the result with the additional parameters generated during the query building process.
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* @return array the generated SQL statement (the first array element) and the corresponding
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* parameters to be bound to the SQL statement (the second array element). The parameters returned
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* include those provided in `$params`.
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*/
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public function build($query, $params = [])
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{
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$query = $query->prepare($this);
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$params = empty($params) ? $query->params : array_merge($params, $query->params);
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$clauses = [
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$this->buildSelect($query->select, $params, $query->distinct, $query->selectOption),
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$this->buildFrom($query->from, $params),
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$this->buildJoin($query->join, $params),
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$this->buildWhere($query->where, $params),
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$this->buildGroupBy($query->groupBy),
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$this->buildHaving($query->having, $params),
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];
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$sql = implode($this->separator, array_filter($clauses));
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$sql = $this->buildOrderByAndLimit($sql, $query->orderBy, $query->limit, $query->offset);
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$union = $this->buildUnion($query->union, $params);
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if ($union !== '') {
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$sql = "($sql){$this->separator}$union";
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}
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return [$sql, $params];
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}
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/**
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* Creates an INSERT SQL statement.
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* For example,
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*
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* ~~~
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* $sql = $queryBuilder->insert('user', [
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* 'name' => 'Sam',
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* 'age' => 30,
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* ], $params);
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* ~~~
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*
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* The method will properly escape the table and column names.
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*
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* @param string $table the table that new rows will be inserted into.
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* @param array $columns the column data (name => value) to be inserted into the table.
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* @param array $params the binding parameters that will be generated by this method.
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* They should be bound to the DB command later.
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* @return string the INSERT SQL
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*/
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public function insert($table, $columns, &$params)
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{
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$schema = $this->db->getSchema();
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if (($tableSchema = $schema->getTableSchema($table)) !== null) {
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$columnSchemas = $tableSchema->columns;
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} else {
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$columnSchemas = [];
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}
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$names = [];
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$placeholders = [];
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foreach ($columns as $name => $value) {
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$names[] = $schema->quoteColumnName($name);
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if ($value instanceof Expression) {
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$placeholders[] = $value->expression;
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foreach ($value->params as $n => $v) {
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$params[$n] = $v;
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}
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} else {
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$phName = self::PARAM_PREFIX . count($params);
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$placeholders[] = $phName;
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$params[$phName] = !is_array($value) && isset($columnSchemas[$name]) ? $columnSchemas[$name]->dbTypecast($value) : $value;
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}
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}
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return 'INSERT INTO ' . $schema->quoteTableName($table)
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. (!empty($names) ? ' (' . implode(', ', $names) . ')' : '')
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. (!empty($placeholders) ? ' VALUES (' . implode(', ', $placeholders) . ')' : ' DEFAULT VALUES');
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}
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/**
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* Generates a batch INSERT SQL statement.
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* For example,
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*
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* ~~~
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* $sql = $queryBuilder->batchInsert('user', ['name', 'age'], [
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* ['Tom', 30],
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* ['Jane', 20],
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* ['Linda', 25],
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* ]);
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* ~~~
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*
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* Note that the values in each row must match the corresponding column names.
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*
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* The method will properly escape the column names, and quote the values to be inserted.
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*
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* @param string $table the table that new rows will be inserted into.
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* @param array $columns the column names
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* @param array $rows the rows to be batch inserted into the table
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* @return string the batch INSERT SQL statement
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*/
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public function batchInsert($table, $columns, $rows)
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{
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$schema = $this->db->getSchema();
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if (($tableSchema = $schema->getTableSchema($table)) !== null) {
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$columnSchemas = $tableSchema->columns;
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} else {
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$columnSchemas = [];
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}
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$values = [];
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foreach ($rows as $row) {
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$vs = [];
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foreach ($row as $i => $value) {
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if (isset($columns[$i], $columnSchemas[$columns[$i]]) && !is_array($value)) {
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$value = $columnSchemas[$columns[$i]]->dbTypecast($value);
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}
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if (is_string($value)) {
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$value = $schema->quoteValue($value);
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} elseif ($value === false) {
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$value = 0;
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} elseif ($value === null) {
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$value = 'NULL';
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}
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$vs[] = $value;
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}
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$values[] = '(' . implode(', ', $vs) . ')';
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}
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foreach ($columns as $i => $name) {
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$columns[$i] = $schema->quoteColumnName($name);
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}
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return 'INSERT INTO ' . $schema->quoteTableName($table)
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. ' (' . implode(', ', $columns) . ') VALUES ' . implode(', ', $values);
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}
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/**
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* Creates an UPDATE SQL statement.
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* For example,
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*
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* ~~~
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* $params = [];
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* $sql = $queryBuilder->update('user', ['status' => 1], 'age > 30', $params);
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* ~~~
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*
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* The method will properly escape the table and column names.
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*
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* @param string $table the table to be updated.
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* @param array $columns the column data (name => value) to be updated.
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* @param array|string $condition the condition that will be put in the WHERE part. Please
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* refer to [[Query::where()]] on how to specify condition.
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* @param array $params the binding parameters that will be modified by this method
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* so that they can be bound to the DB command later.
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* @return string the UPDATE SQL
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*/
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public function update($table, $columns, $condition, &$params)
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{
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if (($tableSchema = $this->db->getTableSchema($table)) !== null) {
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$columnSchemas = $tableSchema->columns;
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} else {
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$columnSchemas = [];
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}
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$lines = [];
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foreach ($columns as $name => $value) {
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if ($value instanceof Expression) {
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$lines[] = $this->db->quoteColumnName($name) . '=' . $value->expression;
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foreach ($value->params as $n => $v) {
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$params[$n] = $v;
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}
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} else {
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$phName = self::PARAM_PREFIX . count($params);
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$lines[] = $this->db->quoteColumnName($name) . '=' . $phName;
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$params[$phName] = !is_array($value) && isset($columnSchemas[$name]) ? $columnSchemas[$name]->dbTypecast($value) : $value;
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}
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}
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$sql = 'UPDATE ' . $this->db->quoteTableName($table) . ' SET ' . implode(', ', $lines);
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$where = $this->buildWhere($condition, $params);
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return $where === '' ? $sql : $sql . ' ' . $where;
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}
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/**
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* Creates a DELETE SQL statement.
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* For example,
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*
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* ~~~
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* $sql = $queryBuilder->delete('user', 'status = 0');
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* ~~~
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*
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* The method will properly escape the table and column names.
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*
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* @param string $table the table where the data will be deleted from.
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* @param array|string $condition the condition that will be put in the WHERE part. Please
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* refer to [[Query::where()]] on how to specify condition.
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* @param array $params the binding parameters that will be modified by this method
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* so that they can be bound to the DB command later.
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* @return string the DELETE SQL
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*/
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public function delete($table, $condition, &$params)
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{
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$sql = 'DELETE FROM ' . $this->db->quoteTableName($table);
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$where = $this->buildWhere($condition, $params);
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return $where === '' ? $sql : $sql . ' ' . $where;
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}
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/**
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* Builds a SQL statement for creating a new DB table.
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*
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* The columns in the new table should be specified as name-definition pairs (e.g. 'name' => 'string'),
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* where name stands for a column name which will be properly quoted by the method, and definition
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* stands for the column type which can contain an abstract DB type.
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* The [[getColumnType()]] method will be invoked to convert any abstract type into a physical one.
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*
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* If a column is specified with definition only (e.g. 'PRIMARY KEY (name, type)'), it will be directly
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* inserted into the generated SQL.
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*
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* For example,
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*
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* ~~~
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* $sql = $queryBuilder->createTable('user', [
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* 'id' => 'pk',
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* 'name' => 'string',
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* 'age' => 'integer',
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* ]);
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* ~~~
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*
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* @param string $table the name of the table to be created. The name will be properly quoted by the method.
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* @param array $columns the columns (name => definition) in the new table.
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* @param string $options additional SQL fragment that will be appended to the generated SQL.
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* @return string the SQL statement for creating a new DB table.
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*/
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public function createTable($table, $columns, $options = null)
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{
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$cols = [];
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foreach ($columns as $name => $type) {
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if (is_string($name)) {
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$cols[] = "\t" . $this->db->quoteColumnName($name) . ' ' . $this->getColumnType($type);
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} else {
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$cols[] = "\t" . $type;
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}
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}
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$sql = "CREATE TABLE " . $this->db->quoteTableName($table) . " (\n" . implode(",\n", $cols) . "\n)";
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return $options === null ? $sql : $sql . ' ' . $options;
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}
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/**
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* Builds a SQL statement for renaming a DB table.
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* @param string $oldName the table to be renamed. The name will be properly quoted by the method.
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* @param string $newName the new table name. The name will be properly quoted by the method.
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* @return string the SQL statement for renaming a DB table.
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*/
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public function renameTable($oldName, $newName)
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{
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return 'RENAME TABLE ' . $this->db->quoteTableName($oldName) . ' TO ' . $this->db->quoteTableName($newName);
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}
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/**
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* Builds a SQL statement for dropping a DB table.
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* @param string $table the table to be dropped. The name will be properly quoted by the method.
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* @return string the SQL statement for dropping a DB table.
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*/
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public function dropTable($table)
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{
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return "DROP TABLE " . $this->db->quoteTableName($table);
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}
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/**
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* Builds a SQL statement for adding a primary key constraint to an existing table.
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* @param string $name the name of the primary key constraint.
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* @param string $table the table that the primary key constraint will be added to.
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* @param string|array $columns comma separated string or array of columns that the primary key will consist of.
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* @return string the SQL statement for adding a primary key constraint to an existing table.
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*/
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public function addPrimaryKey($name, $table, $columns)
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{
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if (is_string($columns)) {
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$columns = preg_split('/\s*,\s*/', $columns, -1, PREG_SPLIT_NO_EMPTY);
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}
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foreach ($columns as $i => $col) {
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$columns[$i] = $this->db->quoteColumnName($col);
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}
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return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' ADD CONSTRAINT '
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. $this->db->quoteColumnName($name) . ' PRIMARY KEY ('
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. implode(', ', $columns). ' )';
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}
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/**
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* Builds a SQL statement for removing a primary key constraint to an existing table.
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* @param string $name the name of the primary key constraint to be removed.
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* @param string $table the table that the primary key constraint will be removed from.
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* @return string the SQL statement for removing a primary key constraint from an existing table.
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*/
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public function dropPrimaryKey($name, $table)
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{
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return 'ALTER TABLE ' . $this->db->quoteTableName($table)
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. ' DROP CONSTRAINT ' . $this->db->quoteColumnName($name);
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}
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/**
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* Builds a SQL statement for truncating a DB table.
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* @param string $table the table to be truncated. The name will be properly quoted by the method.
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* @return string the SQL statement for truncating a DB table.
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*/
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public function truncateTable($table)
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{
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return "TRUNCATE TABLE " . $this->db->quoteTableName($table);
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}
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/**
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* Builds a SQL statement for adding a new DB column.
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* @param string $table the table that the new column will be added to. The table name will be properly quoted by the method.
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* @param string $column the name of the new column. The name will be properly quoted by the method.
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* @param string $type the column type. The [[getColumnType()]] method will be invoked to convert abstract column type (if any)
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* into the physical one. Anything that is not recognized as abstract type will be kept in the generated SQL.
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* For example, 'string' will be turned into 'varchar(255)', while 'string not null' will become 'varchar(255) not null'.
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* @return string the SQL statement for adding a new column.
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*/
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public function addColumn($table, $column, $type)
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{
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return 'ALTER TABLE ' . $this->db->quoteTableName($table)
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. ' ADD ' . $this->db->quoteColumnName($column) . ' '
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. $this->getColumnType($type);
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}
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|
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/**
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* Builds a SQL statement for dropping a DB column.
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* @param string $table the table whose column is to be dropped. The name will be properly quoted by the method.
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* @param string $column the name of the column to be dropped. The name will be properly quoted by the method.
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* @return string the SQL statement for dropping a DB column.
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*/
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public function dropColumn($table, $column)
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{
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return "ALTER TABLE " . $this->db->quoteTableName($table)
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. " DROP COLUMN " . $this->db->quoteColumnName($column);
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}
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|
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/**
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* Builds a SQL statement for renaming a column.
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* @param string $table the table whose column is to be renamed. The name will be properly quoted by the method.
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* @param string $oldName the old name of the column. The name will be properly quoted by the method.
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* @param string $newName the new name of the column. The name will be properly quoted by the method.
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* @return string the SQL statement for renaming a DB column.
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*/
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public function renameColumn($table, $oldName, $newName)
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{
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return "ALTER TABLE " . $this->db->quoteTableName($table)
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. " RENAME COLUMN " . $this->db->quoteColumnName($oldName)
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. " TO " . $this->db->quoteColumnName($newName);
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}
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|
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/**
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|
* Builds a SQL statement for changing the definition of a column.
|
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* @param string $table the table whose column is to be changed. The table name will be properly quoted by the method.
|
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* @param string $column the name of the column to be changed. The name will be properly quoted by the method.
|
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* @param string $type the new column type. The [[getColumnType()]] method will be invoked to convert abstract
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* column type (if any) into the physical one. Anything that is not recognized as abstract type will be kept
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* in the generated SQL. For example, 'string' will be turned into 'varchar(255)', while 'string not null'
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* will become 'varchar(255) not null'.
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* @return string the SQL statement for changing the definition of a column.
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*/
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public function alterColumn($table, $column, $type)
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{
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return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' CHANGE '
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. $this->db->quoteColumnName($column) . ' '
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. $this->db->quoteColumnName($column) . ' '
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. $this->getColumnType($type);
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}
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|
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/**
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* Builds a SQL statement for adding a foreign key constraint to an existing table.
|
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* The method will properly quote the table and column names.
|
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* @param string $name the name of the foreign key constraint.
|
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* @param string $table the table that the foreign key constraint will be added to.
|
|
* @param string|array $columns the name of the column to that the constraint will be added on.
|
|
* If there are multiple columns, separate them with commas or use an array to represent them.
|
|
* @param string $refTable the table that the foreign key references to.
|
|
* @param string|array $refColumns the name of the column that the foreign key references to.
|
|
* If there are multiple columns, separate them with commas or use an array to represent them.
|
|
* @param string $delete the ON DELETE option. Most DBMS support these options: RESTRICT, CASCADE, NO ACTION, SET DEFAULT, SET NULL
|
|
* @param string $update the ON UPDATE option. Most DBMS support these options: RESTRICT, CASCADE, NO ACTION, SET DEFAULT, SET NULL
|
|
* @return string the SQL statement for adding a foreign key constraint to an existing table.
|
|
*/
|
|
public function addForeignKey($name, $table, $columns, $refTable, $refColumns, $delete = null, $update = null)
|
|
{
|
|
$sql = 'ALTER TABLE ' . $this->db->quoteTableName($table)
|
|
. ' ADD CONSTRAINT ' . $this->db->quoteColumnName($name)
|
|
. ' FOREIGN KEY (' . $this->buildColumns($columns) . ')'
|
|
. ' REFERENCES ' . $this->db->quoteTableName($refTable)
|
|
. ' (' . $this->buildColumns($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 $table the table whose foreign is to be dropped. The name will be properly quoted by the method.
|
|
* @return string the SQL statement for dropping a foreign key constraint.
|
|
*/
|
|
public function dropForeignKey($name, $table)
|
|
{
|
|
return 'ALTER TABLE ' . $this->db->quoteTableName($table)
|
|
. ' DROP CONSTRAINT ' . $this->db->quoteColumnName($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|array $columns the column(s) that should be included in the index. If there are multiple columns,
|
|
* separate them with commas or use an array to represent them. Each column name will be properly quoted
|
|
* by the method, unless a parenthesis is found in the name.
|
|
* @param boolean $unique whether to add UNIQUE constraint on the created index.
|
|
* @return string the SQL statement for creating a new index.
|
|
*/
|
|
public function createIndex($name, $table, $columns, $unique = false)
|
|
{
|
|
return ($unique ? 'CREATE UNIQUE INDEX ' : 'CREATE INDEX ')
|
|
. $this->db->quoteTableName($name) . ' ON '
|
|
. $this->db->quoteTableName($table)
|
|
. ' (' . $this->buildColumns($columns) . ')';
|
|
}
|
|
|
|
/**
|
|
* 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 $table the table whose index is to be dropped. The name will be properly quoted by the method.
|
|
* @return string the SQL statement for dropping an index.
|
|
*/
|
|
public function dropIndex($name, $table)
|
|
{
|
|
return 'DROP INDEX ' . $this->db->quoteTableName($name) . ' ON ' . $this->db->quoteTableName($table);
|
|
}
|
|
|
|
/**
|
|
* Creates a SQL statement for resetting 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 string $table the name of the table whose primary key sequence will be reset
|
|
* @param array|string $value the value for the primary key of the next new row inserted. If this is not set,
|
|
* the next new row's primary key will have a value 1.
|
|
* @return string the SQL statement for resetting sequence
|
|
* @throws NotSupportedException if this is not supported by the underlying DBMS
|
|
*/
|
|
public function resetSequence($table, $value = null)
|
|
{
|
|
throw new NotSupportedException($this->db->getDriverName() . ' does not support resetting sequence.');
|
|
}
|
|
|
|
/**
|
|
* Builds a SQL statement for enabling or disabling 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.
|
|
* @param string $table the table name. Defaults to empty string, meaning that no table will be changed.
|
|
* @return string the SQL statement for checking integrity
|
|
* @throws NotSupportedException if this is not supported by the underlying DBMS
|
|
*/
|
|
public function checkIntegrity($check = true, $schema = '', $table = '')
|
|
{
|
|
throw new NotSupportedException($this->db->getDriverName() . ' does not support enabling/disabling integrity check.');
|
|
}
|
|
|
|
/**
|
|
* Converts an abstract column type into a physical column type.
|
|
* The conversion is done using the type map specified in [[typeMap]].
|
|
* The following abstract column types are supported (using MySQL as an example to explain the corresponding
|
|
* physical types):
|
|
*
|
|
* - `pk`: an auto-incremental primary key type, will be converted into "int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY"
|
|
* - `bigpk`: an auto-incremental primary key type, will be converted into "bigint(20) NOT NULL AUTO_INCREMENT PRIMARY KEY"
|
|
* - `string`: string type, will be converted into "varchar(255)"
|
|
* - `text`: a long string type, will be converted into "text"
|
|
* - `smallint`: a small integer type, will be converted into "smallint(6)"
|
|
* - `integer`: integer type, will be converted into "int(11)"
|
|
* - `bigint`: a big integer type, will be converted into "bigint(20)"
|
|
* - `boolean`: boolean type, will be converted into "tinyint(1)"
|
|
* - `float``: float number type, will be converted into "float"
|
|
* - `decimal`: decimal number type, will be converted into "decimal"
|
|
* - `datetime`: datetime type, will be converted into "datetime"
|
|
* - `timestamp`: timestamp type, will be converted into "timestamp"
|
|
* - `time`: time type, will be converted into "time"
|
|
* - `date`: date type, will be converted into "date"
|
|
* - `money`: money type, will be converted into "decimal(19,4)"
|
|
* - `binary`: binary data type, will be converted into "blob"
|
|
*
|
|
* 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 converted result.
|
|
* For example, 'string NOT NULL' is converted to 'varchar(255) NOT NULL'.
|
|
*
|
|
* For some of the abstract types you can also specify a length or precision constraint
|
|
* by appending it in round brackets directly to the type.
|
|
* For example `string(32)` will be converted into "varchar(32)" on a MySQL database.
|
|
* If the underlying DBMS does not support these kind of constraints for a type it will
|
|
* be ignored.
|
|
*
|
|
* If a type cannot be found in [[typeMap]], it will be returned without any change.
|
|
* @param string|ColumnSchemaBuilder $type abstract column type
|
|
* @return string physical column type.
|
|
*/
|
|
public function getColumnType($type)
|
|
{
|
|
if ($type instanceof ColumnSchemaBuilder) {
|
|
$type = $type->__toString();
|
|
}
|
|
|
|
if (isset($this->typeMap[$type])) {
|
|
return $this->typeMap[$type];
|
|
} elseif (preg_match('/^(\w+)\((.+?)\)(.*)$/', $type, $matches)) {
|
|
if (isset($this->typeMap[$matches[1]])) {
|
|
return preg_replace('/\(.+\)/', '(' . $matches[2] . ')', $this->typeMap[$matches[1]]) . $matches[3];
|
|
}
|
|
} elseif (preg_match('/^(\w+)\s+/', $type, $matches)) {
|
|
if (isset($this->typeMap[$matches[1]])) {
|
|
return preg_replace('/^\w+/', $this->typeMap[$matches[1]], $type);
|
|
}
|
|
}
|
|
|
|
return $type;
|
|
}
|
|
|
|
/**
|
|
* @param array $columns
|
|
* @param array $params the binding parameters to be populated
|
|
* @param boolean $distinct
|
|
* @param string $selectOption
|
|
* @return string the SELECT clause built from [[Query::$select]].
|
|
*/
|
|
public function buildSelect($columns, &$params, $distinct = false, $selectOption = null)
|
|
{
|
|
$select = $distinct ? 'SELECT DISTINCT' : 'SELECT';
|
|
if ($selectOption !== null) {
|
|
$select .= ' ' . $selectOption;
|
|
}
|
|
|
|
if (empty($columns)) {
|
|
return $select . ' *';
|
|
}
|
|
|
|
foreach ($columns as $i => $column) {
|
|
if ($column instanceof Expression) {
|
|
if (is_int($i)) {
|
|
$columns[$i] = $column->expression;
|
|
} else {
|
|
$columns[$i] = $column->expression . ' AS ' . $this->db->quoteColumnName($i);
|
|
}
|
|
$params = array_merge($params, $column->params);
|
|
} elseif ($column instanceof Query) {
|
|
list($sql, $params) = $this->build($column, $params);
|
|
$columns[$i] = "($sql) AS " . $this->db->quoteColumnName($i);
|
|
} elseif (is_string($i)) {
|
|
if (strpos($column, '(') === false) {
|
|
$column = $this->db->quoteColumnName($column);
|
|
}
|
|
$columns[$i] = "$column AS " . $this->db->quoteColumnName($i);
|
|
} elseif (strpos($column, '(') === false) {
|
|
if (preg_match('/^(.*?)(?i:\s+as\s+|\s+)([\w\-_\.]+)$/', $column, $matches)) {
|
|
$columns[$i] = $this->db->quoteColumnName($matches[1]) . ' AS ' . $this->db->quoteColumnName($matches[2]);
|
|
} else {
|
|
$columns[$i] = $this->db->quoteColumnName($column);
|
|
}
|
|
}
|
|
}
|
|
|
|
return $select . ' ' . implode(', ', $columns);
|
|
}
|
|
|
|
/**
|
|
* @param array $tables
|
|
* @param array $params the binding parameters to be populated
|
|
* @return string the FROM clause built from [[Query::$from]].
|
|
*/
|
|
public function buildFrom($tables, &$params)
|
|
{
|
|
if (empty($tables)) {
|
|
return '';
|
|
}
|
|
|
|
$tables = $this->quoteTableNames($tables, $params);
|
|
|
|
return 'FROM ' . implode(', ', $tables);
|
|
}
|
|
|
|
/**
|
|
* @param array $joins
|
|
* @param array $params the binding parameters to be populated
|
|
* @return string the JOIN clause built from [[Query::$join]].
|
|
* @throws Exception if the $joins parameter is not in proper format
|
|
*/
|
|
public function buildJoin($joins, &$params)
|
|
{
|
|
if (empty($joins)) {
|
|
return '';
|
|
}
|
|
|
|
foreach ($joins as $i => $join) {
|
|
if (!is_array($join) || !isset($join[0], $join[1])) {
|
|
throw new Exception('A join clause must be specified as an array of join type, join table, and optionally join condition.');
|
|
}
|
|
// 0:join type, 1:join table, 2:on-condition (optional)
|
|
list ($joinType, $table) = $join;
|
|
$tables = $this->quoteTableNames((array) $table, $params);
|
|
$table = reset($tables);
|
|
$joins[$i] = "$joinType $table";
|
|
if (isset($join[2])) {
|
|
$condition = $this->buildCondition($join[2], $params);
|
|
if ($condition !== '') {
|
|
$joins[$i] .= ' ON ' . $condition;
|
|
}
|
|
}
|
|
}
|
|
|
|
return implode($this->separator, $joins);
|
|
}
|
|
|
|
/**
|
|
* Quotes table names passed
|
|
*
|
|
* @param array $tables
|
|
* @param array $params
|
|
* @return array
|
|
*/
|
|
private function quoteTableNames($tables, &$params)
|
|
{
|
|
foreach ($tables as $i => $table) {
|
|
if ($table instanceof Query) {
|
|
list($sql, $params) = $this->build($table, $params);
|
|
$tables[$i] = "($sql) " . $this->db->quoteTableName($i);
|
|
} elseif (is_string($i)) {
|
|
if (strpos($table, '(') === false) {
|
|
$table = $this->db->quoteTableName($table);
|
|
}
|
|
$tables[$i] = "$table " . $this->db->quoteTableName($i);
|
|
} elseif (strpos($table, '(') === false) {
|
|
if (preg_match('/^(.*?)(?i:\s+as|)\s+([^ ]+)$/', $table, $matches)) { // with alias
|
|
$tables[$i] = $this->db->quoteTableName($matches[1]) . ' ' . $this->db->quoteTableName($matches[2]);
|
|
} else {
|
|
$tables[$i] = $this->db->quoteTableName($table);
|
|
}
|
|
}
|
|
}
|
|
return $tables;
|
|
}
|
|
|
|
/**
|
|
* @param string|array $condition
|
|
* @param array $params the binding parameters to be populated
|
|
* @return string the WHERE clause built from [[Query::$where]].
|
|
*/
|
|
public function buildWhere($condition, &$params)
|
|
{
|
|
$where = $this->buildCondition($condition, $params);
|
|
|
|
return $where === '' ? '' : 'WHERE ' . $where;
|
|
}
|
|
|
|
/**
|
|
* @param array $columns
|
|
* @return string the GROUP BY clause
|
|
*/
|
|
public function buildGroupBy($columns)
|
|
{
|
|
return empty($columns) ? '' : 'GROUP BY ' . $this->buildColumns($columns);
|
|
}
|
|
|
|
/**
|
|
* @param string|array $condition
|
|
* @param array $params the binding parameters to be populated
|
|
* @return string the HAVING clause built from [[Query::$having]].
|
|
*/
|
|
public function buildHaving($condition, &$params)
|
|
{
|
|
$having = $this->buildCondition($condition, $params);
|
|
|
|
return $having === '' ? '' : 'HAVING ' . $having;
|
|
}
|
|
|
|
/**
|
|
* Builds the ORDER BY and LIMIT/OFFSET clauses and appends them to the given SQL.
|
|
* @param string $sql the existing SQL (without ORDER BY/LIMIT/OFFSET)
|
|
* @param array $orderBy the order by columns. See [[Query::orderBy]] for more details on how to specify this parameter.
|
|
* @param integer $limit the limit number. See [[Query::limit]] for more details.
|
|
* @param integer $offset the offset number. See [[Query::offset]] for more details.
|
|
* @return string the SQL completed with ORDER BY/LIMIT/OFFSET (if any)
|
|
*/
|
|
public function buildOrderByAndLimit($sql, $orderBy, $limit, $offset)
|
|
{
|
|
$orderBy = $this->buildOrderBy($orderBy);
|
|
if ($orderBy !== '') {
|
|
$sql .= $this->separator . $orderBy;
|
|
}
|
|
$limit = $this->buildLimit($limit, $offset);
|
|
if ($limit !== '') {
|
|
$sql .= $this->separator . $limit;
|
|
}
|
|
return $sql;
|
|
}
|
|
|
|
/**
|
|
* @param array $columns
|
|
* @return string the ORDER BY clause built from [[Query::$orderBy]].
|
|
*/
|
|
public function buildOrderBy($columns)
|
|
{
|
|
if (empty($columns)) {
|
|
return '';
|
|
}
|
|
$orders = [];
|
|
foreach ($columns as $name => $direction) {
|
|
if ($direction instanceof Expression) {
|
|
$orders[] = $direction->expression;
|
|
} else {
|
|
$orders[] = $this->db->quoteColumnName($name) . ($direction === SORT_DESC ? ' DESC' : '');
|
|
}
|
|
}
|
|
|
|
return 'ORDER BY ' . implode(', ', $orders);
|
|
}
|
|
|
|
/**
|
|
* @param integer $limit
|
|
* @param integer $offset
|
|
* @return string the LIMIT and OFFSET clauses
|
|
*/
|
|
public function buildLimit($limit, $offset)
|
|
{
|
|
$sql = '';
|
|
if ($this->hasLimit($limit)) {
|
|
$sql = 'LIMIT ' . $limit;
|
|
}
|
|
if ($this->hasOffset($offset)) {
|
|
$sql .= ' OFFSET ' . $offset;
|
|
}
|
|
|
|
return ltrim($sql);
|
|
}
|
|
|
|
/**
|
|
* Checks to see if the given limit is effective.
|
|
* @param mixed $limit the given limit
|
|
* @return boolean whether the limit is effective
|
|
*/
|
|
protected function hasLimit($limit)
|
|
{
|
|
return ctype_digit((string) $limit);
|
|
}
|
|
|
|
/**
|
|
* Checks to see if the given offset is effective.
|
|
* @param mixed $offset the given offset
|
|
* @return boolean whether the offset is effective
|
|
*/
|
|
protected function hasOffset($offset)
|
|
{
|
|
$offset = (string) $offset;
|
|
return ctype_digit($offset) && $offset !== '0';
|
|
}
|
|
|
|
/**
|
|
* @param array $unions
|
|
* @param array $params the binding parameters to be populated
|
|
* @return string the UNION clause built from [[Query::$union]].
|
|
*/
|
|
public function buildUnion($unions, &$params)
|
|
{
|
|
if (empty($unions)) {
|
|
return '';
|
|
}
|
|
|
|
$result = '';
|
|
|
|
foreach ($unions as $i => $union) {
|
|
$query = $union['query'];
|
|
if ($query instanceof Query) {
|
|
list($unions[$i]['query'], $params) = $this->build($query, $params);
|
|
}
|
|
|
|
$result .= 'UNION ' . ($union['all'] ? 'ALL ' : '') . '( ' . $unions[$i]['query'] . ' ) ';
|
|
}
|
|
|
|
return trim($result);
|
|
}
|
|
|
|
/**
|
|
* Processes columns and properly quotes them if necessary.
|
|
* It will join all columns into a string with comma as separators.
|
|
* @param string|array $columns the columns to be processed
|
|
* @return string the processing result
|
|
*/
|
|
public function buildColumns($columns)
|
|
{
|
|
if (!is_array($columns)) {
|
|
if (strpos($columns, '(') !== false) {
|
|
return $columns;
|
|
} else {
|
|
$columns = preg_split('/\s*,\s*/', $columns, -1, PREG_SPLIT_NO_EMPTY);
|
|
}
|
|
}
|
|
foreach ($columns as $i => $column) {
|
|
if ($column instanceof Expression) {
|
|
$columns[$i] = $column->expression;
|
|
} elseif (strpos($column, '(') === false) {
|
|
$columns[$i] = $this->db->quoteColumnName($column);
|
|
}
|
|
}
|
|
|
|
return is_array($columns) ? implode(', ', $columns) : $columns;
|
|
}
|
|
|
|
/**
|
|
* Parses the condition specification and generates the corresponding SQL expression.
|
|
* @param string|array $condition the condition specification. Please refer to [[Query::where()]]
|
|
* on how to specify a condition.
|
|
* @param array $params the binding parameters to be populated
|
|
* @return string the generated SQL expression
|
|
*/
|
|
public function buildCondition($condition, &$params)
|
|
{
|
|
if (!is_array($condition)) {
|
|
return (string) $condition;
|
|
} elseif (empty($condition)) {
|
|
return '';
|
|
}
|
|
|
|
if (isset($condition[0])) { // operator format: operator, operand 1, operand 2, ...
|
|
$operator = strtoupper($condition[0]);
|
|
if (isset($this->conditionBuilders[$operator])) {
|
|
$method = $this->conditionBuilders[$operator];
|
|
} else {
|
|
$method = 'buildSimpleCondition';
|
|
}
|
|
array_shift($condition);
|
|
return $this->$method($operator, $condition, $params);
|
|
} else { // hash format: 'column1' => 'value1', 'column2' => 'value2', ...
|
|
return $this->buildHashCondition($condition, $params);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Creates a condition based on column-value pairs.
|
|
* @param array $condition the condition specification.
|
|
* @param array $params the binding parameters to be populated
|
|
* @return string the generated SQL expression
|
|
*/
|
|
public function buildHashCondition($condition, &$params)
|
|
{
|
|
$parts = [];
|
|
foreach ($condition as $column => $value) {
|
|
if (is_array($value) || $value instanceof Query) {
|
|
// IN condition
|
|
$parts[] = $this->buildInCondition('IN', [$column, $value], $params);
|
|
} else {
|
|
if (strpos($column, '(') === false) {
|
|
$column = $this->db->quoteColumnName($column);
|
|
}
|
|
if ($value === null) {
|
|
$parts[] = "$column IS NULL";
|
|
} elseif ($value instanceof Expression) {
|
|
$parts[] = "$column=" . $value->expression;
|
|
foreach ($value->params as $n => $v) {
|
|
$params[$n] = $v;
|
|
}
|
|
} else {
|
|
$phName = self::PARAM_PREFIX . count($params);
|
|
$parts[] = "$column=$phName";
|
|
$params[$phName] = $value;
|
|
}
|
|
}
|
|
}
|
|
return count($parts) === 1 ? $parts[0] : '(' . implode(') AND (', $parts) . ')';
|
|
}
|
|
|
|
/**
|
|
* Connects two or more SQL expressions with the `AND` or `OR` operator.
|
|
* @param string $operator the operator to use for connecting the given operands
|
|
* @param array $operands the SQL expressions to connect.
|
|
* @param array $params the binding parameters to be populated
|
|
* @return string the generated SQL expression
|
|
*/
|
|
public function buildAndCondition($operator, $operands, &$params)
|
|
{
|
|
$parts = [];
|
|
foreach ($operands as $operand) {
|
|
if (is_array($operand)) {
|
|
$operand = $this->buildCondition($operand, $params);
|
|
}
|
|
if ($operand !== '') {
|
|
$parts[] = $operand;
|
|
}
|
|
}
|
|
if (!empty($parts)) {
|
|
return '(' . implode(") $operator (", $parts) . ')';
|
|
} else {
|
|
return '';
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Inverts an SQL expressions with `NOT` operator.
|
|
* @param string $operator the operator to use for connecting the given operands
|
|
* @param array $operands the SQL expressions to connect.
|
|
* @param array $params the binding parameters to be populated
|
|
* @return string the generated SQL expression
|
|
* @throws InvalidParamException if wrong number of operands have been given.
|
|
*/
|
|
public function buildNotCondition($operator, $operands, &$params)
|
|
{
|
|
if (count($operands) != 1) {
|
|
throw new InvalidParamException("Operator '$operator' requires exactly one operand.");
|
|
}
|
|
|
|
$operand = reset($operands);
|
|
if (is_array($operand)) {
|
|
$operand = $this->buildCondition($operand, $params);
|
|
}
|
|
if ($operand === '') {
|
|
return '';
|
|
}
|
|
|
|
return "$operator ($operand)";
|
|
}
|
|
|
|
/**
|
|
* Creates an SQL expressions with the `BETWEEN` operator.
|
|
* @param string $operator the operator to use (e.g. `BETWEEN` or `NOT BETWEEN`)
|
|
* @param array $operands the first operand is the column name. The second and third operands
|
|
* describe the interval that column value should be in.
|
|
* @param array $params the binding parameters to be populated
|
|
* @return string the generated SQL expression
|
|
* @throws InvalidParamException if wrong number of operands have been given.
|
|
*/
|
|
public function buildBetweenCondition($operator, $operands, &$params)
|
|
{
|
|
if (!isset($operands[0], $operands[1], $operands[2])) {
|
|
throw new InvalidParamException("Operator '$operator' requires three operands.");
|
|
}
|
|
|
|
list($column, $value1, $value2) = $operands;
|
|
|
|
if (strpos($column, '(') === false) {
|
|
$column = $this->db->quoteColumnName($column);
|
|
}
|
|
if ($value1 instanceof Expression) {
|
|
foreach ($value1->params as $n => $v) {
|
|
$params[$n] = $v;
|
|
}
|
|
$phName1 = $value1->expression;
|
|
} else {
|
|
$phName1 = self::PARAM_PREFIX . count($params);
|
|
$params[$phName1] = $value1;
|
|
}
|
|
if ($value2 instanceof Expression) {
|
|
foreach ($value2->params as $n => $v) {
|
|
$params[$n] = $v;
|
|
}
|
|
$phName2 = $value2->expression;
|
|
} else {
|
|
$phName2 = self::PARAM_PREFIX . count($params);
|
|
$params[$phName2] = $value2;
|
|
}
|
|
|
|
return "$column $operator $phName1 AND $phName2";
|
|
}
|
|
|
|
/**
|
|
* Creates an SQL expressions with the `IN` operator.
|
|
* @param string $operator the operator to use (e.g. `IN` or `NOT IN`)
|
|
* @param array $operands the first operand is the column name. If it is an array
|
|
* a composite IN condition will be generated.
|
|
* The second operand is an array of values that column value should be among.
|
|
* If it is an empty array the generated expression will be a `false` value if
|
|
* operator is `IN` and empty if operator is `NOT IN`.
|
|
* @param array $params the binding parameters to be populated
|
|
* @return string the generated SQL expression
|
|
* @throws Exception if wrong number of operands have been given.
|
|
*/
|
|
public function buildInCondition($operator, $operands, &$params)
|
|
{
|
|
if (!isset($operands[0], $operands[1])) {
|
|
throw new Exception("Operator '$operator' requires two operands.");
|
|
}
|
|
|
|
list($column, $values) = $operands;
|
|
|
|
if ($values === [] || $column === []) {
|
|
return $operator === 'IN' ? '0=1' : '';
|
|
}
|
|
|
|
if ($values instanceof Query) {
|
|
return $this->buildSubqueryInCondition($operator, $column, $values, $params);
|
|
}
|
|
|
|
$values = (array) $values;
|
|
|
|
if (count($column) > 1) {
|
|
return $this->buildCompositeInCondition($operator, $column, $values, $params);
|
|
}
|
|
|
|
if (is_array($column)) {
|
|
$column = reset($column);
|
|
}
|
|
foreach ($values as $i => $value) {
|
|
if (is_array($value)) {
|
|
$value = isset($value[$column]) ? $value[$column] : null;
|
|
}
|
|
if ($value === null) {
|
|
$values[$i] = 'NULL';
|
|
} elseif ($value instanceof Expression) {
|
|
$values[$i] = $value->expression;
|
|
foreach ($value->params as $n => $v) {
|
|
$params[$n] = $v;
|
|
}
|
|
} else {
|
|
$phName = self::PARAM_PREFIX . count($params);
|
|
$params[$phName] = $value;
|
|
$values[$i] = $phName;
|
|
}
|
|
}
|
|
if (strpos($column, '(') === false) {
|
|
$column = $this->db->quoteColumnName($column);
|
|
}
|
|
|
|
if (count($values) > 1) {
|
|
return "$column $operator (" . implode(', ', $values) . ')';
|
|
} else {
|
|
$operator = $operator === 'IN' ? '=' : '<>';
|
|
return $column . $operator . reset($values);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Builds SQL for IN condition
|
|
*
|
|
* @param string $operator
|
|
* @param array $columns
|
|
* @param Query $values
|
|
* @param array $params
|
|
* @return string SQL
|
|
*/
|
|
protected function buildSubqueryInCondition($operator, $columns, $values, &$params)
|
|
{
|
|
list($sql, $params) = $this->build($values, $params);
|
|
if (is_array($columns)) {
|
|
foreach ($columns as $i => $col) {
|
|
if (strpos($col, '(') === false) {
|
|
$columns[$i] = $this->db->quoteColumnName($col);
|
|
}
|
|
}
|
|
return '(' . implode(', ', $columns) . ") $operator ($sql)";
|
|
} else {
|
|
if (strpos($columns, '(') === false) {
|
|
$columns = $this->db->quoteColumnName($columns);
|
|
}
|
|
return "$columns $operator ($sql)";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Builds SQL for IN condition
|
|
*
|
|
* @param string $operator
|
|
* @param array $columns
|
|
* @param array $values
|
|
* @param array $params
|
|
* @return string SQL
|
|
*/
|
|
protected function buildCompositeInCondition($operator, $columns, $values, &$params)
|
|
{
|
|
$vss = [];
|
|
foreach ($values as $value) {
|
|
$vs = [];
|
|
foreach ($columns as $column) {
|
|
if (isset($value[$column])) {
|
|
$phName = self::PARAM_PREFIX . count($params);
|
|
$params[$phName] = $value[$column];
|
|
$vs[] = $phName;
|
|
} else {
|
|
$vs[] = 'NULL';
|
|
}
|
|
}
|
|
$vss[] = '(' . implode(', ', $vs) . ')';
|
|
}
|
|
foreach ($columns as $i => $column) {
|
|
if (strpos($column, '(') === false) {
|
|
$columns[$i] = $this->db->quoteColumnName($column);
|
|
}
|
|
}
|
|
|
|
return '(' . implode(', ', $columns) . ") $operator (" . implode(', ', $vss) . ')';
|
|
}
|
|
|
|
/**
|
|
* Creates an SQL expressions with the `LIKE` operator.
|
|
* @param string $operator the operator to use (e.g. `LIKE`, `NOT LIKE`, `OR LIKE` or `OR NOT LIKE`)
|
|
* @param array $operands an array of two or three operands
|
|
*
|
|
* - The first operand is the column name.
|
|
* - The second operand is a single value or an array of values that column value
|
|
* should be compared with. If it is an empty array the generated expression will
|
|
* be a `false` value if operator is `LIKE` or `OR LIKE`, and empty if operator
|
|
* is `NOT LIKE` or `OR NOT LIKE`.
|
|
* - An optional third operand can also be provided to specify how to escape special characters
|
|
* in the value(s). The operand should be an array of mappings from the special characters to their
|
|
* escaped counterparts. If this operand is not provided, a default escape mapping will be used.
|
|
* You may use `false` or an empty array to indicate the values are already escaped and no escape
|
|
* should be applied. Note that when using an escape mapping (or the third operand is not provided),
|
|
* the values will be automatically enclosed within a pair of percentage characters.
|
|
* @param array $params the binding parameters to be populated
|
|
* @return string the generated SQL expression
|
|
* @throws InvalidParamException if wrong number of operands have been given.
|
|
*/
|
|
public function buildLikeCondition($operator, $operands, &$params)
|
|
{
|
|
if (!isset($operands[0], $operands[1])) {
|
|
throw new InvalidParamException("Operator '$operator' requires two operands.");
|
|
}
|
|
|
|
$escape = isset($operands[2]) ? $operands[2] : ['%' => '\%', '_' => '\_', '\\' => '\\\\'];
|
|
unset($operands[2]);
|
|
|
|
if (!preg_match('/^(AND |OR |)(((NOT |))I?LIKE)/', $operator, $matches)) {
|
|
throw new InvalidParamException("Invalid operator '$operator'.");
|
|
}
|
|
$andor = ' ' . (!empty($matches[1]) ? $matches[1] : 'AND ');
|
|
$not = !empty($matches[3]);
|
|
$operator = $matches[2];
|
|
|
|
list($column, $values) = $operands;
|
|
|
|
if (!is_array($values)) {
|
|
$values = [$values];
|
|
}
|
|
|
|
if (empty($values)) {
|
|
return $not ? '' : '0=1';
|
|
}
|
|
|
|
if (strpos($column, '(') === false) {
|
|
$column = $this->db->quoteColumnName($column);
|
|
}
|
|
|
|
$parts = [];
|
|
foreach ($values as $value) {
|
|
if ($value instanceof Expression) {
|
|
foreach ($value->params as $n => $v) {
|
|
$params[$n] = $v;
|
|
}
|
|
$phName = $value->expression;
|
|
} else {
|
|
$phName = self::PARAM_PREFIX . count($params);
|
|
$params[$phName] = empty($escape) ? $value : ('%' . strtr($value, $escape) . '%');
|
|
}
|
|
$parts[] = "$column $operator $phName";
|
|
}
|
|
|
|
return implode($andor, $parts);
|
|
}
|
|
|
|
/**
|
|
* Creates an SQL expressions with the `EXISTS` operator.
|
|
* @param string $operator the operator to use (e.g. `EXISTS` or `NOT EXISTS`)
|
|
* @param array $operands contains only one element which is a [[Query]] object representing the sub-query.
|
|
* @param array $params the binding parameters to be populated
|
|
* @return string the generated SQL expression
|
|
* @throws InvalidParamException if the operand is not a [[Query]] object.
|
|
*/
|
|
public function buildExistsCondition($operator, $operands, &$params)
|
|
{
|
|
if ($operands[0] instanceof Query) {
|
|
list($sql, $params) = $this->build($operands[0], $params);
|
|
return "$operator ($sql)";
|
|
} else {
|
|
throw new InvalidParamException('Subquery for EXISTS operator must be a Query object.');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Creates an SQL expressions like `"column" operator value`.
|
|
* @param string $operator the operator to use. Anything could be used e.g. `>`, `<=`, etc.
|
|
* @param array $operands contains two column names.
|
|
* @param array $params the binding parameters to be populated
|
|
* @return string the generated SQL expression
|
|
* @throws InvalidParamException if wrong number of operands have been given.
|
|
*/
|
|
public function buildSimpleCondition($operator, $operands, &$params)
|
|
{
|
|
if (count($operands) !== 2) {
|
|
throw new InvalidParamException("Operator '$operator' requires two operands.");
|
|
}
|
|
|
|
list($column, $value) = $operands;
|
|
|
|
if (strpos($column, '(') === false) {
|
|
$column = $this->db->quoteColumnName($column);
|
|
}
|
|
|
|
if ($value === null) {
|
|
return "$column $operator NULL";
|
|
} elseif ($value instanceof Expression) {
|
|
foreach ($value->params as $n => $v) {
|
|
$params[$n] = $v;
|
|
}
|
|
return "$column $operator {$value->expression}";
|
|
} elseif ($value instanceof Query) {
|
|
list($sql, $params) = $this->build($value, $params);
|
|
return "$column $operator ($sql)";
|
|
} else {
|
|
$phName = self::PARAM_PREFIX . count($params);
|
|
$params[$phName] = $value;
|
|
return "$column $operator $phName";
|
|
}
|
|
}
|
|
}
|