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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\sqlite;
use yii\base\InvalidArgumentException;
use yii\base\NotSupportedException;
use yii\db\Connection;
use yii\db\Constraint;
use yii\db\Expression;
use yii\db\ExpressionInterface;
use yii\db\Query;
use yii\helpers\StringHelper;
/**
* QueryBuilder is the query builder for SQLite databases.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class QueryBuilder extends \yii\db\QueryBuilder
{
/**
* @var array mapping from abstract column types (keys) to physical column types (values).
*/
public $typeMap = [
Schema::TYPE_PK => 'integer PRIMARY KEY AUTOINCREMENT NOT NULL',
Schema::TYPE_UPK => 'integer UNSIGNED PRIMARY KEY AUTOINCREMENT NOT NULL',
Schema::TYPE_BIGPK => 'integer PRIMARY KEY AUTOINCREMENT NOT NULL',
Schema::TYPE_UBIGPK => 'integer UNSIGNED PRIMARY KEY AUTOINCREMENT NOT NULL',
Schema::TYPE_CHAR => 'char(1)',
Schema::TYPE_STRING => 'varchar(255)',
Schema::TYPE_TEXT => 'text',
Schema::TYPE_TINYINT => 'tinyint',
Schema::TYPE_SMALLINT => 'smallint',
Schema::TYPE_INTEGER => 'integer',
Schema::TYPE_BIGINT => 'bigint',
Schema::TYPE_FLOAT => 'float',
Schema::TYPE_DOUBLE => 'double',
Schema::TYPE_DECIMAL => 'decimal(10,0)',
Schema::TYPE_DATETIME => 'datetime',
Schema::TYPE_TIMESTAMP => 'timestamp',
Schema::TYPE_TIME => 'time',
Schema::TYPE_DATE => 'date',
Schema::TYPE_BINARY => 'blob',
Schema::TYPE_BOOLEAN => 'boolean',
Schema::TYPE_MONEY => 'decimal(19,4)',
];
/**
* {@inheritdoc}
*/
protected function defaultExpressionBuilders()
{
return array_merge(parent::defaultExpressionBuilders(), [
'yii\db\conditions\LikeCondition' => 'yii\db\sqlite\conditions\LikeConditionBuilder',
'yii\db\conditions\InCondition' => 'yii\db\sqlite\conditions\InConditionBuilder',
]);
}
/**
* {@inheritdoc}
* @see https://stackoverflow.com/questions/15277373/sqlite-upsert-update-or-insert/15277374#15277374
*/
public function upsert($table, $insertColumns, $updateColumns, &$params)
{
/** @var Constraint[] $constraints */
list($uniqueNames, $insertNames, $updateNames) = $this->prepareUpsertColumns($table, $insertColumns, $updateColumns, $constraints);
if (empty($uniqueNames)) {
return $this->insert($table, $insertColumns, $params);
}
list(, $placeholders, $values, $params) = $this->prepareInsertValues($table, $insertColumns, $params);
$insertSql = 'INSERT OR IGNORE INTO ' . $this->db->quoteTableName($table)
. (!empty($insertNames) ? ' (' . implode(', ', $insertNames) . ')' : '')
. (!empty($placeholders) ? ' VALUES (' . implode(', ', $placeholders) . ')' : $values);
if ($updateColumns === false) {
return $insertSql;
}
$updateCondition = ['or'];
$quotedTableName = $this->db->quoteTableName($table);
foreach ($constraints as $constraint) {
$constraintCondition = ['and'];
foreach ($constraint->columnNames as $name) {
$quotedName = $this->db->quoteColumnName($name);
$constraintCondition[] = "$quotedTableName.$quotedName=(SELECT $quotedName FROM `EXCLUDED`)";
}
$updateCondition[] = $constraintCondition;
}
if ($updateColumns === true) {
$updateColumns = [];
foreach ($updateNames as $name) {
$quotedName = $this->db->quoteColumnName($name);
if (strrpos($quotedName, '.') === false) {
$quotedName = "(SELECT $quotedName FROM `EXCLUDED`)";
}
$updateColumns[$name] = new Expression($quotedName);
}
}
$updateSql = 'WITH "EXCLUDED" (' . implode(', ', $insertNames)
. ') AS (' . (!empty($placeholders) ? 'VALUES (' . implode(', ', $placeholders) . ')' : ltrim($values, ' ')) . ') '
. $this->update($table, $updateColumns, $updateCondition, $params);
return "$updateSql; $insertSql;";
}
/**
* Generates a batch INSERT SQL statement.
*
* For example,
*
* ```php
* $connection->createCommand()->batchInsert('user', ['name', 'age'], [
* ['Tom', 30],
* ['Jane', 20],
* ['Linda', 25],
* ])->execute();
* ```
*
* Note that the values in each row must match the corresponding column names.
*
* @param string $table the table that new rows will be inserted into.
* @param array $columns the column names
* @param array|\Generator $rows the rows to be batch inserted into the table
* @return string the batch INSERT SQL statement
*/
public function batchInsert($table, $columns, $rows, &$params = [])
{
if (empty($rows)) {
return '';
}
// SQLite supports batch insert natively since 3.7.11
// http://www.sqlite.org/releaselog/3_7_11.html
$this->db->open(); // ensure pdo is not null
if (version_compare($this->db->getServerVersion(), '3.7.11', '>=')) {
return parent::batchInsert($table, $columns, $rows, $params);
}
$schema = $this->db->getSchema();
if (($tableSchema = $schema->getTableSchema($table)) !== null) {
$columnSchemas = $tableSchema->columns;
} else {
$columnSchemas = [];
}
$values = [];
foreach ($rows as $row) {
$vs = [];
foreach ($row as $i => $value) {
if (isset($columnSchemas[$columns[$i]])) {
$value = $columnSchemas[$columns[$i]]->dbTypecast($value);
}
if (is_string($value)) {
$value = $schema->quoteValue($value);
} elseif (is_float($value)) {
// ensure type cast always has . as decimal separator in all locales
$value = StringHelper::floatToString($value);
} elseif ($value === false) {
$value = 0;
} elseif ($value === null) {
$value = 'NULL';
} elseif ($value instanceof ExpressionInterface) {
$value = $this->buildExpression($value, $params);
}
$vs[] = $value;
}
$values[] = implode(', ', $vs);
}
if (empty($values)) {
return '';
}
foreach ($columns as $i => $name) {
$columns[$i] = $schema->quoteColumnName($name);
}
return 'INSERT INTO ' . $schema->quoteTableName($table)
. ' (' . implode(', ', $columns) . ') SELECT ' . implode(' UNION SELECT ', $values);
}
/**
* 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 $tableName the name of the table whose primary key sequence will be reset
* @param mixed $value the value for the primary key of the next new row inserted. If this is not set,
* the next new row's primary key will have a value 1.
* @return string the SQL statement for resetting sequence
* @throws InvalidArgumentException if the table does not exist or there is no sequence associated with the table.
*/
public function resetSequence($tableName, $value = null)
{
$db = $this->db;
$table = $db->getTableSchema($tableName);
if ($table !== null && $table->sequenceName !== null) {
$tableName = $db->quoteTableName($tableName);
if ($value === null) {
$key = $this->db->quoteColumnName(reset($table->primaryKey));
$value = $this->db->useMaster(function (Connection $db) use ($key, $tableName) {
return $db->createCommand("SELECT MAX($key) FROM $tableName")->queryScalar();
});
} else {
$value = (int) $value - 1;
}
return "UPDATE sqlite_sequence SET seq='$value' WHERE name='{$table->name}'";
} elseif ($table === null) {
throw new InvalidArgumentException("Table not found: $tableName");
}
throw new InvalidArgumentException("There is not sequence associated with table '$tableName'.'");
}
/**
* Enables or disables integrity check.
* @param bool $check whether to turn on or off the integrity check.
* @param string $schema the schema of the tables. Meaningless for SQLite.
* @param string $table the table name. Meaningless for SQLite.
* @return string the SQL statement for checking integrity
* @throws NotSupportedException this is not supported by SQLite
*/
public function checkIntegrity($check = true, $schema = '', $table = '')
{
return 'PRAGMA foreign_keys=' . (int) $check;
}
/**
* Builds a SQL statement for truncating a DB table.
* @param string $table the table to be truncated. The name will be properly quoted by the method.
* @return string the SQL statement for truncating a DB table.
*/
public function truncateTable($table)
{
return 'DELETE FROM ' . $this->db->quoteTableName($table);
}
/**
* 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);
}
/**
* 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 $column the name of the column to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping a DB column.
* @throws NotSupportedException this is not supported by SQLite
*/
public function dropColumn($table, $column)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* 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 $oldName the old name of the column. The name will be properly quoted by the method.
* @param string $newName the new name of the column. The name will be properly quoted by the method.
* @return string the SQL statement for renaming a DB column.
* @throws NotSupportedException this is not supported by SQLite
*/
public function renameColumn($table, $oldName, $newName)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* 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|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 $update the ON UPDATE option. Most DBMS support these options: RESTRICT, CASCADE, NO ACTION, SET DEFAULT, SET NULL
* @return string the SQL statement for adding a foreign key constraint to an existing table.
* @throws NotSupportedException this is not supported by SQLite
*/
public function addForeignKey($name, $table, $columns, $refTable, $refColumns, $delete = null, $update = null)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* 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 $table the table whose foreign is to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping a foreign key constraint.
* @throws NotSupportedException this is not supported by SQLite
*/
public function dropForeignKey($name, $table)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* 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 $newName the new table name. The name will be properly quoted by the method.
* @return string the SQL statement for renaming a DB table.
*/
public function renameTable($table, $newName)
{
return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' RENAME TO ' . $this->db->quoteTableName($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 $type the new column type. The [[getColumnType()]] method will be invoked to convert abstract
* column type (if any) into the physical one. Anything that is not recognized as abstract type will be kept
* in the generated SQL. For example, 'string' will be turned into 'varchar(255)', while 'string not null'
* will become 'varchar(255) not null'.
* @return string the SQL statement for changing the definition of a column.
* @throws NotSupportedException this is not supported by SQLite
*/
public function alterColumn($table, $column, $type)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* Builds a SQL statement for adding a primary key constraint to an existing table.
* @param string $name the name of the primary key constraint.
* @param string $table the table that the primary key constraint will be added to.
* @param string|array $columns comma separated string or array of columns that the primary key will consist of.
* @return string the SQL statement for adding a primary key constraint to an existing table.
* @throws NotSupportedException this is not supported by SQLite
*/
public function addPrimaryKey($name, $table, $columns)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* Builds a SQL statement for removing a primary key constraint to an existing table.
* @param string $name the name of the primary key constraint to be removed.
* @param string $table the table that the primary key constraint will be removed from.
* @return string the SQL statement for removing a primary key constraint from an existing table.
* @throws NotSupportedException this is not supported by SQLite
*/
public function dropPrimaryKey($name, $table)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* {@inheritdoc}
* @throws NotSupportedException this is not supported by SQLite.
*/
public function addUnique($name, $table, $columns)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* {@inheritdoc}
* @throws NotSupportedException this is not supported by SQLite.
*/
public function dropUnique($name, $table)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* {@inheritdoc}
* @throws NotSupportedException this is not supported by SQLite.
*/
public function addCheck($name, $table, $expression)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* {@inheritdoc}
* @throws NotSupportedException this is not supported by SQLite.
*/
public function dropCheck($name, $table)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* {@inheritdoc}
* @throws NotSupportedException this is not supported by SQLite.
*/
public function addDefaultValue($name, $table, $column, $value)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* {@inheritdoc}
* @throws NotSupportedException this is not supported by SQLite.
*/
public function dropDefaultValue($name, $table)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* {@inheritdoc}
* @throws NotSupportedException
* @since 2.0.8
*/
public function addCommentOnColumn($table, $column, $comment)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* {@inheritdoc}
* @throws NotSupportedException
* @since 2.0.8
*/
public function addCommentOnTable($table, $comment)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* {@inheritdoc}
* @throws NotSupportedException
* @since 2.0.8
*/
public function dropCommentFromColumn($table, $column)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* {@inheritdoc}
* @throws NotSupportedException
* @since 2.0.8
*/
public function dropCommentFromTable($table)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
}
/**
* {@inheritdoc}
*/
public function buildLimit($limit, $offset)
{
$sql = '';
if ($this->hasLimit($limit)) {
$sql = 'LIMIT ' . $limit;
if ($this->hasOffset($offset)) {
$sql .= ' OFFSET ' . $offset;
}
} elseif ($this->hasOffset($offset)) {
// limit is not optional in SQLite
// http://www.sqlite.org/syntaxdiagrams.html#select-stmt
$sql = "LIMIT 9223372036854775807 OFFSET $offset"; // 2^63-1
}
return $sql;
}
/**
* {@inheritdoc}
*/
public function build($query, $params = [])
{
$query = $query->prepare($this);
$params = empty($params) ? $query->params : array_merge($params, $query->params);
$clauses = [
$this->buildSelect($query->select, $params, $query->distinct, $query->selectOption),
$this->buildFrom($query->from, $params),
$this->buildJoin($query->join, $params),
$this->buildWhere($query->where, $params),
$this->buildGroupBy($query->groupBy),
$this->buildHaving($query->having, $params),
];
$sql = implode($this->separator, array_filter($clauses));
$sql = $this->buildOrderByAndLimit($sql, $query->orderBy, $query->limit, $query->offset);
if (!empty($query->orderBy)) {
foreach ($query->orderBy as $expression) {
if ($expression instanceof ExpressionInterface) {
$this->buildExpression($expression, $params);
}
}
}
if (!empty($query->groupBy)) {
foreach ($query->groupBy as $expression) {
if ($expression instanceof ExpressionInterface) {
$this->buildExpression($expression, $params);
}
}
}
$union = $this->buildUnion($query->union, $params);
if ($union !== '') {
$sql = "$sql{$this->separator}$union";
}
return [$sql, $params];
}
/**
* {@inheritdoc}
*/
public function buildUnion($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);
}
}
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