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MysqlSchemaDialect.php
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MysqlSchemaDialect.php
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<?php
declare(strict_types=1);
/**
* CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
* @link https://cakephp.org CakePHP(tm) Project
* @since 3.0.0
* @license https://opensource.org/licenses/mit-license.php MIT License
*/
namespace Cake\Database\Schema;
use Cake\Database\DriverFeatureEnum;
use Cake\Database\Exception\DatabaseException;
/**
* Schema generation/reflection features for MySQL
*
* @internal
*/
class MysqlSchemaDialect extends SchemaDialect
{
/**
* Generate the SQL to list the tables and views.
*
* @param array<string, mixed> $config The connection configuration to use for
* getting tables from.
* @return array<mixed> An array of (sql, params) to execute.
*/
public function listTablesSql(array $config): array
{
return ['SHOW FULL TABLES FROM ' . $this->_driver->quoteIdentifier($config['database']), []];
}
/**
* Generate the SQL to list the tables, excluding all views.
*
* @param array<string, mixed> $config The connection configuration to use for
* getting tables from.
* @return array<mixed> An array of (sql, params) to execute.
*/
public function listTablesWithoutViewsSql(array $config): array
{
return [
'SHOW FULL TABLES FROM ' . $this->_driver->quoteIdentifier($config['database'])
. ' WHERE TABLE_TYPE = "BASE TABLE"'
, []];
}
/**
* @inheritDoc
*/
public function describeColumnSql(string $tableName, array $config): array
{
return ['SHOW FULL COLUMNS FROM ' . $this->_driver->quoteIdentifier($tableName), []];
}
/**
* @inheritDoc
*/
public function describeIndexSql(string $tableName, array $config): array
{
return ['SHOW INDEXES FROM ' . $this->_driver->quoteIdentifier($tableName), []];
}
/**
* @inheritDoc
*/
public function describeOptionsSql(string $tableName, array $config): array
{
return ['SHOW TABLE STATUS WHERE Name = ?', [$tableName]];
}
/**
* @inheritDoc
*/
public function convertOptionsDescription(TableSchema $schema, array $row): void
{
$schema->setOptions([
'engine' => $row['Engine'],
'collation' => $row['Collation'],
]);
}
/**
* Convert a MySQL column type into an abstract type.
*
* The returned type will be a type that Cake\Database\TypeFactory can handle.
*
* @param string $column The column type + length
* @return array<string, mixed> Array of column information.
* @throws \Cake\Database\Exception\DatabaseException When column type cannot be parsed.
*/
protected function _convertColumn(string $column): array
{
preg_match('/([a-z]+)(?:\(([0-9,]+)\))?\s*([a-z]+)?/i', $column, $matches);
if (!$matches) {
throw new DatabaseException(sprintf('Unable to parse column type from `%s`', $column));
}
$col = strtolower($matches[1]);
$length = $precision = $scale = null;
if (isset($matches[2]) && strlen($matches[2])) {
$length = $matches[2];
if (str_contains($matches[2], ',')) {
[$length, $precision] = explode(',', $length);
}
$length = (int)$length;
$precision = (int)$precision;
}
$type = $this->_applyTypeSpecificColumnConversion(
$col,
compact('length', 'precision', 'scale')
);
if ($type !== null) {
return $type;
}
if (in_array($col, ['date', 'time'])) {
return ['type' => $col, 'length' => null];
}
if (in_array($col, ['datetime', 'timestamp'])) {
$typeName = $col;
if ($length > 0) {
$typeName = $col . 'fractional';
}
return ['type' => $typeName, 'length' => null, 'precision' => $length];
}
if (($col === 'tinyint' && $length === 1) || $col === 'boolean') {
return ['type' => TableSchemaInterface::TYPE_BOOLEAN, 'length' => null];
}
$unsigned = (isset($matches[3]) && strtolower($matches[3]) === 'unsigned');
if (str_contains($col, 'bigint') || $col === 'bigint') {
return ['type' => TableSchemaInterface::TYPE_BIGINTEGER, 'length' => null, 'unsigned' => $unsigned];
}
if ($col === 'tinyint') {
return ['type' => TableSchemaInterface::TYPE_TINYINTEGER, 'length' => null, 'unsigned' => $unsigned];
}
if ($col === 'smallint') {
return ['type' => TableSchemaInterface::TYPE_SMALLINTEGER, 'length' => null, 'unsigned' => $unsigned];
}
if (in_array($col, ['int', 'integer', 'mediumint'])) {
return ['type' => TableSchemaInterface::TYPE_INTEGER, 'length' => null, 'unsigned' => $unsigned];
}
if ($col === 'char' && $length === 36) {
return ['type' => TableSchemaInterface::TYPE_UUID, 'length' => null];
}
if ($col === 'char') {
return ['type' => TableSchemaInterface::TYPE_CHAR, 'length' => $length];
}
if (str_contains($col, 'char')) {
return ['type' => TableSchemaInterface::TYPE_STRING, 'length' => $length];
}
if (str_contains($col, 'text')) {
$lengthName = substr($col, 0, -4);
$length = TableSchema::$columnLengths[$lengthName] ?? null;
return ['type' => TableSchemaInterface::TYPE_TEXT, 'length' => $length];
}
if ($col === 'binary' && $length === 16) {
return ['type' => TableSchemaInterface::TYPE_BINARY_UUID, 'length' => null];
}
if (str_contains($col, 'blob') || in_array($col, ['binary', 'varbinary'])) {
$lengthName = substr($col, 0, -4);
$length = TableSchema::$columnLengths[$lengthName] ?? $length;
return ['type' => TableSchemaInterface::TYPE_BINARY, 'length' => $length];
}
if (str_contains($col, 'float') || str_contains($col, 'double')) {
return [
'type' => TableSchemaInterface::TYPE_FLOAT,
'length' => $length,
'precision' => $precision,
'unsigned' => $unsigned,
];
}
if (str_contains($col, 'decimal')) {
return [
'type' => TableSchemaInterface::TYPE_DECIMAL,
'length' => $length,
'precision' => $precision,
'unsigned' => $unsigned,
];
}
if (str_contains($col, 'json')) {
return ['type' => TableSchemaInterface::TYPE_JSON, 'length' => null];
}
return ['type' => TableSchemaInterface::TYPE_STRING, 'length' => null];
}
/**
* @inheritDoc
*/
public function convertColumnDescription(TableSchema $schema, array $row): void
{
$field = $this->_convertColumn($row['Type']);
$field += [
'null' => $row['Null'] === 'YES',
'default' => $row['Default'],
'collate' => $row['Collation'],
'comment' => $row['Comment'],
];
if (isset($row['Extra']) && $row['Extra'] === 'auto_increment') {
$field['autoIncrement'] = true;
}
$schema->addColumn($row['Field'], $field);
}
/**
* @inheritDoc
*/
public function convertIndexDescription(TableSchema $schema, array $row): void
{
$type = null;
$columns = $length = [];
$name = $row['Key_name'];
if ($name === 'PRIMARY') {
$name = $type = TableSchema::CONSTRAINT_PRIMARY;
}
if (!empty($row['Column_name'])) {
$columns[] = $row['Column_name'];
}
if ($row['Index_type'] === 'FULLTEXT') {
$type = TableSchema::INDEX_FULLTEXT;
} elseif ((int)$row['Non_unique'] === 0 && $type !== 'primary') {
$type = TableSchema::CONSTRAINT_UNIQUE;
} elseif ($type !== 'primary') {
$type = TableSchema::INDEX_INDEX;
}
if (!empty($row['Sub_part'])) {
$length[$row['Column_name']] = $row['Sub_part'];
}
$isIndex = (
$type === TableSchema::INDEX_INDEX ||
$type === TableSchema::INDEX_FULLTEXT
);
if ($isIndex) {
$existing = $schema->getIndex($name);
} else {
$existing = $schema->getConstraint($name);
}
// MySQL multi column indexes come back as multiple rows.
if ($existing) {
$columns = array_merge($existing['columns'], $columns);
$length = array_merge($existing['length'], $length);
}
if ($isIndex) {
$schema->addIndex($name, [
'type' => $type,
'columns' => $columns,
'length' => $length,
]);
} else {
$schema->addConstraint($name, [
'type' => $type,
'columns' => $columns,
'length' => $length,
]);
}
}
/**
* @inheritDoc
*/
public function describeForeignKeySql(string $tableName, array $config): array
{
$sql = 'SELECT * FROM information_schema.key_column_usage AS kcu
INNER JOIN information_schema.referential_constraints AS rc
ON (
kcu.CONSTRAINT_NAME = rc.CONSTRAINT_NAME
AND kcu.CONSTRAINT_SCHEMA = rc.CONSTRAINT_SCHEMA
)
WHERE kcu.TABLE_SCHEMA = ? AND kcu.TABLE_NAME = ? AND rc.TABLE_NAME = ?
ORDER BY kcu.ORDINAL_POSITION ASC';
return [$sql, [$config['database'], $tableName, $tableName]];
}
/**
* @inheritDoc
*/
public function convertForeignKeyDescription(TableSchema $schema, array $row): void
{
$data = [
'type' => TableSchema::CONSTRAINT_FOREIGN,
'columns' => [$row['COLUMN_NAME']],
'references' => [$row['REFERENCED_TABLE_NAME'], $row['REFERENCED_COLUMN_NAME']],
'update' => $this->_convertOnClause($row['UPDATE_RULE']),
'delete' => $this->_convertOnClause($row['DELETE_RULE']),
];
$name = $row['CONSTRAINT_NAME'];
$schema->addConstraint($name, $data);
}
/**
* @inheritDoc
*/
public function truncateTableSql(TableSchema $schema): array
{
return [sprintf('TRUNCATE TABLE `%s`', $schema->name())];
}
/**
* @inheritDoc
*/
public function createTableSql(TableSchema $schema, array $columns, array $constraints, array $indexes): array
{
$content = implode(",\n", array_merge($columns, $constraints, $indexes));
$temporary = $schema->isTemporary() ? ' TEMPORARY ' : ' ';
$content = sprintf("CREATE%sTABLE `%s` (\n%s\n)", $temporary, $schema->name(), $content);
$options = $schema->getOptions();
if (isset($options['engine'])) {
$content .= sprintf(' ENGINE=%s', $options['engine']);
}
if (isset($options['charset'])) {
$content .= sprintf(' DEFAULT CHARSET=%s', $options['charset']);
}
if (isset($options['collate'])) {
$content .= sprintf(' COLLATE=%s', $options['collate']);
}
return [$content];
}
/**
* @inheritDoc
*/
public function columnSql(TableSchema $schema, string $name): string
{
$data = $schema->getColumn($name);
assert($data !== null);
$sql = $this->_getTypeSpecificColumnSql($data['type'], $schema, $name);
if ($sql !== null) {
return $sql;
}
$out = $this->_driver->quoteIdentifier($name);
$nativeJson = $this->_driver->supports(DriverFeatureEnum::JSON);
$typeMap = [
TableSchemaInterface::TYPE_TINYINTEGER => ' TINYINT',
TableSchemaInterface::TYPE_SMALLINTEGER => ' SMALLINT',
TableSchemaInterface::TYPE_INTEGER => ' INTEGER',
TableSchemaInterface::TYPE_BIGINTEGER => ' BIGINT',
TableSchemaInterface::TYPE_BINARY_UUID => ' BINARY(16)',
TableSchemaInterface::TYPE_BOOLEAN => ' BOOLEAN',
TableSchemaInterface::TYPE_FLOAT => ' FLOAT',
TableSchemaInterface::TYPE_DECIMAL => ' DECIMAL',
TableSchemaInterface::TYPE_DATE => ' DATE',
TableSchemaInterface::TYPE_TIME => ' TIME',
TableSchemaInterface::TYPE_DATETIME => ' DATETIME',
TableSchemaInterface::TYPE_DATETIME_FRACTIONAL => ' DATETIME',
TableSchemaInterface::TYPE_TIMESTAMP => ' TIMESTAMP',
TableSchemaInterface::TYPE_TIMESTAMP_FRACTIONAL => ' TIMESTAMP',
TableSchemaInterface::TYPE_TIMESTAMP_TIMEZONE => ' TIMESTAMP',
TableSchemaInterface::TYPE_CHAR => ' CHAR',
TableSchemaInterface::TYPE_UUID => ' CHAR(36)',
TableSchemaInterface::TYPE_JSON => $nativeJson ? ' JSON' : ' LONGTEXT',
];
$specialMap = [
'string' => true,
'text' => true,
'char' => true,
'binary' => true,
];
if (isset($typeMap[$data['type']])) {
$out .= $typeMap[$data['type']];
}
if (isset($specialMap[$data['type']])) {
switch ($data['type']) {
case TableSchemaInterface::TYPE_STRING:
$out .= ' VARCHAR';
if (!isset($data['length'])) {
$data['length'] = 255;
}
break;
case TableSchemaInterface::TYPE_TEXT:
$isKnownLength = in_array($data['length'], TableSchema::$columnLengths);
if (empty($data['length']) || !$isKnownLength) {
$out .= ' TEXT';
break;
}
$length = array_search($data['length'], TableSchema::$columnLengths);
assert(is_string($length));
$out .= ' ' . strtoupper($length) . 'TEXT';
break;
case TableSchemaInterface::TYPE_BINARY:
$isKnownLength = in_array($data['length'], TableSchema::$columnLengths);
if ($isKnownLength) {
$length = array_search($data['length'], TableSchema::$columnLengths);
assert(is_string($length));
$out .= ' ' . strtoupper($length) . 'BLOB';
break;
}
if (empty($data['length'])) {
$out .= ' BLOB';
break;
}
if ($data['length'] > 2) {
$out .= ' VARBINARY(' . $data['length'] . ')';
} else {
$out .= ' BINARY(' . $data['length'] . ')';
}
break;
}
}
$hasLength = [
TableSchemaInterface::TYPE_INTEGER,
TableSchemaInterface::TYPE_CHAR,
TableSchemaInterface::TYPE_SMALLINTEGER,
TableSchemaInterface::TYPE_TINYINTEGER,
TableSchemaInterface::TYPE_STRING,
];
if (in_array($data['type'], $hasLength, true) && isset($data['length'])) {
$out .= '(' . $data['length'] . ')';
}
$lengthAndPrecisionTypes = [
TableSchemaInterface::TYPE_FLOAT,
TableSchemaInterface::TYPE_DECIMAL,
];
if (in_array($data['type'], $lengthAndPrecisionTypes, true) && isset($data['length'])) {
if (isset($data['precision'])) {
$out .= '(' . (int)$data['length'] . ',' . (int)$data['precision'] . ')';
} else {
$out .= '(' . (int)$data['length'] . ')';
}
}
$precisionTypes = [
TableSchemaInterface::TYPE_DATETIME_FRACTIONAL,
TableSchemaInterface::TYPE_TIMESTAMP_FRACTIONAL,
];
if (in_array($data['type'], $precisionTypes, true) && isset($data['precision'])) {
$out .= '(' . (int)$data['precision'] . ')';
}
$hasUnsigned = [
TableSchemaInterface::TYPE_TINYINTEGER,
TableSchemaInterface::TYPE_SMALLINTEGER,
TableSchemaInterface::TYPE_INTEGER,
TableSchemaInterface::TYPE_BIGINTEGER,
TableSchemaInterface::TYPE_FLOAT,
TableSchemaInterface::TYPE_DECIMAL,
];
if (
in_array($data['type'], $hasUnsigned, true) &&
isset($data['unsigned']) &&
$data['unsigned'] === true
) {
$out .= ' UNSIGNED';
}
$hasCollate = [
TableSchemaInterface::TYPE_TEXT,
TableSchemaInterface::TYPE_CHAR,
TableSchemaInterface::TYPE_STRING,
];
if (in_array($data['type'], $hasCollate, true) && isset($data['collate']) && $data['collate'] !== '') {
$out .= ' COLLATE ' . $data['collate'];
}
if (isset($data['null']) && $data['null'] === false) {
$out .= ' NOT NULL';
}
$autoIncrementTypes = [
TableSchemaInterface::TYPE_TINYINTEGER,
TableSchemaInterface::TYPE_SMALLINTEGER,
TableSchemaInterface::TYPE_INTEGER,
TableSchemaInterface::TYPE_BIGINTEGER,
];
if (
in_array($data['type'], $autoIncrementTypes, true) &&
(
($schema->getPrimaryKey() === [$name] && $name === 'id') || $data['autoIncrement']
)
) {
$out .= ' AUTO_INCREMENT';
unset($data['default']);
}
$timestampTypes = [
TableSchemaInterface::TYPE_TIMESTAMP,
TableSchemaInterface::TYPE_TIMESTAMP_FRACTIONAL,
TableSchemaInterface::TYPE_TIMESTAMP_TIMEZONE,
];
if (isset($data['null']) && $data['null'] === true && in_array($data['type'], $timestampTypes, true)) {
$out .= ' NULL';
unset($data['default']);
}
$dateTimeTypes = [
TableSchemaInterface::TYPE_DATETIME,
TableSchemaInterface::TYPE_DATETIME_FRACTIONAL,
TableSchemaInterface::TYPE_TIMESTAMP,
TableSchemaInterface::TYPE_TIMESTAMP_FRACTIONAL,
TableSchemaInterface::TYPE_TIMESTAMP_TIMEZONE,
];
if (
isset($data['default']) &&
in_array($data['type'], $dateTimeTypes) &&
str_contains(strtolower($data['default']), 'current_timestamp')
) {
$out .= ' DEFAULT CURRENT_TIMESTAMP';
if (isset($data['precision'])) {
$out .= '(' . $data['precision'] . ')';
}
unset($data['default']);
}
if (isset($data['default'])) {
$out .= ' DEFAULT ' . $this->_driver->schemaValue($data['default']);
unset($data['default']);
}
if (isset($data['comment']) && $data['comment'] !== '') {
$out .= ' COMMENT ' . $this->_driver->schemaValue($data['comment']);
}
return $out;
}
/**
* @inheritDoc
*/
public function constraintSql(TableSchema $schema, string $name): string
{
$data = $schema->getConstraint($name);
assert($data !== null);
if ($data['type'] === TableSchema::CONSTRAINT_PRIMARY) {
$columns = array_map(
[$this->_driver, 'quoteIdentifier'],
$data['columns']
);
return sprintf('PRIMARY KEY (%s)', implode(', ', $columns));
}
$out = '';
if ($data['type'] === TableSchema::CONSTRAINT_UNIQUE) {
$out = 'UNIQUE KEY ';
}
if ($data['type'] === TableSchema::CONSTRAINT_FOREIGN) {
$out = 'CONSTRAINT ';
}
$out .= $this->_driver->quoteIdentifier($name);
return $this->_keySql($out, $data);
}
/**
* @inheritDoc
*/
public function addConstraintSql(TableSchema $schema): array
{
$sqlPattern = 'ALTER TABLE %s ADD %s;';
$sql = [];
foreach ($schema->constraints() as $name) {
$constraint = $schema->getConstraint($name);
assert($constraint !== null);
if ($constraint['type'] === TableSchema::CONSTRAINT_FOREIGN) {
$tableName = $this->_driver->quoteIdentifier($schema->name());
$sql[] = sprintf($sqlPattern, $tableName, $this->constraintSql($schema, $name));
}
}
return $sql;
}
/**
* @inheritDoc
*/
public function dropConstraintSql(TableSchema $schema): array
{
$sqlPattern = 'ALTER TABLE %s DROP FOREIGN KEY %s;';
$sql = [];
foreach ($schema->constraints() as $name) {
$constraint = $schema->getConstraint($name);
assert($constraint !== null);
if ($constraint['type'] === TableSchema::CONSTRAINT_FOREIGN) {
$tableName = $this->_driver->quoteIdentifier($schema->name());
$constraintName = $this->_driver->quoteIdentifier($name);
$sql[] = sprintf($sqlPattern, $tableName, $constraintName);
}
}
return $sql;
}
/**
* @inheritDoc
*/
public function indexSql(TableSchema $schema, string $name): string
{
$data = $schema->getIndex($name);
assert($data !== null);
$out = '';
if ($data['type'] === TableSchema::INDEX_INDEX) {
$out = 'KEY ';
}
if ($data['type'] === TableSchema::INDEX_FULLTEXT) {
$out = 'FULLTEXT KEY ';
}
$out .= $this->_driver->quoteIdentifier($name);
return $this->_keySql($out, $data);
}
/**
* Helper method for generating key SQL snippets.
*
* @param string $prefix The key prefix
* @param array $data Key data.
* @return string
*/
protected function _keySql(string $prefix, array $data): string
{
$columns = array_map(
[$this->_driver, 'quoteIdentifier'],
$data['columns']
);
foreach ($data['columns'] as $i => $column) {
if (isset($data['length'][$column])) {
$columns[$i] .= sprintf('(%d)', $data['length'][$column]);
}
}
if ($data['type'] === TableSchema::CONSTRAINT_FOREIGN) {
return $prefix . sprintf(
' FOREIGN KEY (%s) REFERENCES %s (%s) ON UPDATE %s ON DELETE %s',
implode(', ', $columns),
$this->_driver->quoteIdentifier($data['references'][0]),
$this->_convertConstraintColumns($data['references'][1]),
$this->_foreignOnClause($data['update']),
$this->_foreignOnClause($data['delete'])
);
}
return $prefix . ' (' . implode(', ', $columns) . ')';
}
}