mirror of
https://github.com/tag1consulting/d7_to_d10_migration.git
synced 2024-11-14 04:03:27 +00:00
549 lines
19 KiB
PHP
549 lines
19 KiB
PHP
<?php
|
||
|
||
/**
|
||
* @file
|
||
* Database schema code for MySQL database servers.
|
||
*/
|
||
|
||
|
||
/**
|
||
* @addtogroup schemaapi
|
||
* @{
|
||
*/
|
||
|
||
class DatabaseSchema_mysql extends DatabaseSchema {
|
||
|
||
/**
|
||
* Maximum length of a table comment in MySQL.
|
||
*/
|
||
const COMMENT_MAX_TABLE = 60;
|
||
|
||
/**
|
||
* Maximum length of a column comment in MySQL.
|
||
*/
|
||
const COMMENT_MAX_COLUMN = 255;
|
||
|
||
/**
|
||
* Get information about the table and database name from the prefix.
|
||
*
|
||
* @return
|
||
* A keyed array with information about the database, table name and prefix.
|
||
*/
|
||
protected function getPrefixInfo($table = 'default', $add_prefix = TRUE) {
|
||
$info = array('prefix' => $this->connection->tablePrefix($table));
|
||
if ($add_prefix) {
|
||
$table = $info['prefix'] . $table;
|
||
}
|
||
if (($pos = strpos($table, '.')) !== FALSE) {
|
||
$info['database'] = substr($table, 0, $pos);
|
||
$info['table'] = substr($table, ++$pos);
|
||
}
|
||
else {
|
||
$db_info = $this->connection->getConnectionOptions();
|
||
$info['database'] = $db_info['database'];
|
||
$info['table'] = $table;
|
||
}
|
||
return $info;
|
||
}
|
||
|
||
/**
|
||
* Build a condition to match a table name against a standard information_schema.
|
||
*
|
||
* MySQL uses databases like schemas rather than catalogs so when we build
|
||
* a condition to query the information_schema.tables, we set the default
|
||
* database as the schema unless specified otherwise, and exclude table_catalog
|
||
* from the condition criteria.
|
||
*/
|
||
protected function buildTableNameCondition($table_name, $operator = '=', $add_prefix = TRUE) {
|
||
$info = $this->connection->getConnectionOptions();
|
||
|
||
// Ensure the table name is not surrounded with quotes as that is not
|
||
// appropriate for schema queries.
|
||
$quote_char = variable_get('mysql_identifier_quote_character', MYSQL_IDENTIFIER_QUOTE_CHARACTER_DEFAULT);
|
||
$table_name = str_replace($quote_char, '', $table_name);
|
||
|
||
$table_info = $this->getPrefixInfo($table_name, $add_prefix);
|
||
|
||
$condition = new DatabaseCondition('AND');
|
||
$condition->condition('table_schema', $table_info['database']);
|
||
$condition->condition('table_name', $table_info['table'], $operator);
|
||
return $condition;
|
||
}
|
||
|
||
/**
|
||
* Generate SQL to create a new table from a Drupal schema definition.
|
||
*
|
||
* @param $name
|
||
* The name of the table to create.
|
||
* @param $table
|
||
* A Schema API table definition array.
|
||
* @return
|
||
* An array of SQL statements to create the table.
|
||
*/
|
||
protected function createTableSql($name, $table) {
|
||
$info = $this->connection->getConnectionOptions();
|
||
|
||
// Provide defaults if needed.
|
||
$table += array(
|
||
'mysql_engine' => 'InnoDB',
|
||
// Allow the default charset to be overridden in settings.php.
|
||
'mysql_character_set' => $this->connection->utf8mb4IsActive() ? 'utf8mb4' : 'utf8',
|
||
);
|
||
|
||
$sql = "CREATE TABLE {" . $name . "} (\n";
|
||
|
||
// Add the SQL statement for each field.
|
||
foreach ($table['fields'] as $field_name => $field) {
|
||
$sql .= $this->createFieldSql($field_name, $this->processField($field)) . ", \n";
|
||
}
|
||
|
||
// Process keys & indexes.
|
||
$keys = $this->createKeysSql($table);
|
||
if (count($keys)) {
|
||
$sql .= implode(", \n", $keys) . ", \n";
|
||
}
|
||
|
||
// Remove the last comma and space.
|
||
$sql = substr($sql, 0, -3) . "\n) ";
|
||
|
||
$sql .= 'ENGINE = ' . $table['mysql_engine'] . ' DEFAULT CHARACTER SET ' . $table['mysql_character_set'];
|
||
// By default, MySQL uses the default collation for new tables, which is
|
||
// 'utf8_general_ci' for utf8. If an alternate collation has been set, it
|
||
// needs to be explicitly specified.
|
||
// @see DatabaseConnection_mysql
|
||
if (!empty($info['collation'])) {
|
||
$sql .= ' COLLATE ' . $info['collation'];
|
||
}
|
||
|
||
// The row format needs to be either DYNAMIC or COMPRESSED in order to allow
|
||
// for the innodb_large_prefix setting to take effect, see
|
||
// https://dev.mysql.com/doc/refman/5.6/en/create-table.html
|
||
if ($this->connection->utf8mb4IsActive()) {
|
||
$sql .= ' ROW_FORMAT=DYNAMIC';
|
||
}
|
||
|
||
// Add table comment.
|
||
if (!empty($table['description'])) {
|
||
$sql .= ' COMMENT ' . $this->prepareComment($table['description'], self::COMMENT_MAX_TABLE);
|
||
}
|
||
|
||
return array($sql);
|
||
}
|
||
|
||
/**
|
||
* Create an SQL string for a field to be used in table creation or alteration.
|
||
*
|
||
* Before passing a field out of a schema definition into this function it has
|
||
* to be processed by _db_process_field().
|
||
*
|
||
* @param $name
|
||
* Name of the field.
|
||
* @param $spec
|
||
* The field specification, as per the schema data structure format.
|
||
*/
|
||
protected function createFieldSql($name, $spec) {
|
||
$sql = "`" . $name . "` " . $spec['mysql_type'];
|
||
|
||
if (in_array($spec['mysql_type'], array('VARCHAR', 'CHAR', 'TINYTEXT', 'MEDIUMTEXT', 'LONGTEXT', 'TEXT'))) {
|
||
if (isset($spec['length'])) {
|
||
$sql .= '(' . $spec['length'] . ')';
|
||
}
|
||
if (!empty($spec['binary'])) {
|
||
$sql .= ' BINARY';
|
||
}
|
||
}
|
||
elseif (isset($spec['precision']) && isset($spec['scale'])) {
|
||
$sql .= '(' . $spec['precision'] . ', ' . $spec['scale'] . ')';
|
||
}
|
||
|
||
if (!empty($spec['unsigned'])) {
|
||
$sql .= ' unsigned';
|
||
}
|
||
|
||
if (isset($spec['not null'])) {
|
||
if ($spec['not null']) {
|
||
$sql .= ' NOT NULL';
|
||
}
|
||
else {
|
||
$sql .= ' NULL';
|
||
}
|
||
}
|
||
|
||
if (!empty($spec['auto_increment'])) {
|
||
$sql .= ' auto_increment';
|
||
}
|
||
|
||
// $spec['default'] can be NULL, so we explicitly check for the key here.
|
||
if (array_key_exists('default', $spec)) {
|
||
if (is_string($spec['default'])) {
|
||
$spec['default'] = "'" . $spec['default'] . "'";
|
||
}
|
||
elseif (!isset($spec['default'])) {
|
||
$spec['default'] = 'NULL';
|
||
}
|
||
$sql .= ' DEFAULT ' . $spec['default'];
|
||
}
|
||
|
||
if (empty($spec['not null']) && !isset($spec['default'])) {
|
||
$sql .= ' DEFAULT NULL';
|
||
}
|
||
|
||
// Add column comment.
|
||
if (!empty($spec['description'])) {
|
||
$sql .= ' COMMENT ' . $this->prepareComment($spec['description'], self::COMMENT_MAX_COLUMN);
|
||
}
|
||
|
||
return $sql;
|
||
}
|
||
|
||
/**
|
||
* Set database-engine specific properties for a field.
|
||
*
|
||
* @param $field
|
||
* A field description array, as specified in the schema documentation.
|
||
*/
|
||
protected function processField($field) {
|
||
|
||
if (!isset($field['size'])) {
|
||
$field['size'] = 'normal';
|
||
}
|
||
|
||
// Set the correct database-engine specific datatype.
|
||
// In case one is already provided, force it to uppercase.
|
||
if (isset($field['mysql_type'])) {
|
||
$field['mysql_type'] = drupal_strtoupper($field['mysql_type']);
|
||
}
|
||
else {
|
||
$map = $this->getFieldTypeMap();
|
||
$field['mysql_type'] = $map[$field['type'] . ':' . $field['size']];
|
||
}
|
||
|
||
if (isset($field['type']) && $field['type'] == 'serial') {
|
||
$field['auto_increment'] = TRUE;
|
||
}
|
||
|
||
return $field;
|
||
}
|
||
|
||
public function getFieldTypeMap() {
|
||
// Put :normal last so it gets preserved by array_flip. This makes
|
||
// it much easier for modules (such as schema.module) to map
|
||
// database types back into schema types.
|
||
// $map does not use drupal_static as its value never changes.
|
||
static $map = array(
|
||
'varchar:normal' => 'VARCHAR',
|
||
'char:normal' => 'CHAR',
|
||
|
||
'text:tiny' => 'TINYTEXT',
|
||
'text:small' => 'TINYTEXT',
|
||
'text:medium' => 'MEDIUMTEXT',
|
||
'text:big' => 'LONGTEXT',
|
||
'text:normal' => 'TEXT',
|
||
|
||
'serial:tiny' => 'TINYINT',
|
||
'serial:small' => 'SMALLINT',
|
||
'serial:medium' => 'MEDIUMINT',
|
||
'serial:big' => 'BIGINT',
|
||
'serial:normal' => 'INT',
|
||
|
||
'int:tiny' => 'TINYINT',
|
||
'int:small' => 'SMALLINT',
|
||
'int:medium' => 'MEDIUMINT',
|
||
'int:big' => 'BIGINT',
|
||
'int:normal' => 'INT',
|
||
|
||
'float:tiny' => 'FLOAT',
|
||
'float:small' => 'FLOAT',
|
||
'float:medium' => 'FLOAT',
|
||
'float:big' => 'DOUBLE',
|
||
'float:normal' => 'FLOAT',
|
||
|
||
'numeric:normal' => 'DECIMAL',
|
||
|
||
'blob:big' => 'LONGBLOB',
|
||
'blob:normal' => 'BLOB',
|
||
);
|
||
return $map;
|
||
}
|
||
|
||
protected function createKeysSql($spec) {
|
||
$keys = array();
|
||
|
||
if (!empty($spec['primary key'])) {
|
||
$keys[] = 'PRIMARY KEY (' . $this->createKeysSqlHelper($spec['primary key']) . ')';
|
||
}
|
||
if (!empty($spec['unique keys'])) {
|
||
foreach ($spec['unique keys'] as $key => $fields) {
|
||
$keys[] = 'UNIQUE KEY `' . $key . '` (' . $this->createKeysSqlHelper($fields) . ')';
|
||
}
|
||
}
|
||
if (!empty($spec['indexes'])) {
|
||
foreach ($spec['indexes'] as $index => $fields) {
|
||
$keys[] = 'INDEX `' . $index . '` (' . $this->createKeysSqlHelper($fields) . ')';
|
||
}
|
||
}
|
||
|
||
return $keys;
|
||
}
|
||
|
||
protected function createKeySql($fields) {
|
||
$return = array();
|
||
foreach ($fields as $field) {
|
||
if (is_array($field)) {
|
||
$return[] = '`' . $field[0] . '`(' . $field[1] . ')';
|
||
}
|
||
else {
|
||
$return[] = '`' . $field . '`';
|
||
}
|
||
}
|
||
return implode(', ', $return);
|
||
}
|
||
|
||
protected function createKeysSqlHelper($fields) {
|
||
$return = array();
|
||
foreach ($fields as $field) {
|
||
if (is_array($field)) {
|
||
$return[] = '`' . $field[0] . '`(' . $field[1] . ')';
|
||
}
|
||
else {
|
||
$return[] = '`' . $field . '`';
|
||
}
|
||
}
|
||
return implode(', ', $return);
|
||
}
|
||
|
||
public function renameTable($table, $new_name) {
|
||
if (!$this->tableExists($table)) {
|
||
throw new DatabaseSchemaObjectDoesNotExistException(t("Cannot rename @table to @table_new: table @table doesn't exist.", array('@table' => $table, '@table_new' => $new_name)));
|
||
}
|
||
if ($this->tableExists($new_name)) {
|
||
throw new DatabaseSchemaObjectExistsException(t("Cannot rename @table to @table_new: table @table_new already exists.", array('@table' => $table, '@table_new' => $new_name)));
|
||
}
|
||
|
||
$info = $this->getPrefixInfo($new_name);
|
||
return $this->connection->query('ALTER TABLE {' . $table . '} RENAME TO `' . $info['table'] . '`');
|
||
}
|
||
|
||
public function dropTable($table) {
|
||
if (!$this->tableExists($table)) {
|
||
return FALSE;
|
||
}
|
||
|
||
$this->connection->query('DROP TABLE {' . $table . '}');
|
||
return TRUE;
|
||
}
|
||
|
||
public function addField($table, $field, $spec, $keys_new = array()) {
|
||
if (!$this->tableExists($table)) {
|
||
throw new DatabaseSchemaObjectDoesNotExistException(t("Cannot add field @table.@field: table doesn't exist.", array('@field' => $field, '@table' => $table)));
|
||
}
|
||
if ($this->fieldExists($table, $field)) {
|
||
throw new DatabaseSchemaObjectExistsException(t("Cannot add field @table.@field: field already exists.", array('@field' => $field, '@table' => $table)));
|
||
}
|
||
|
||
$fixnull = FALSE;
|
||
if (!empty($spec['not null']) && !isset($spec['default'])) {
|
||
$fixnull = TRUE;
|
||
$spec['not null'] = FALSE;
|
||
}
|
||
$query = 'ALTER TABLE {' . $table . '} ADD ';
|
||
$query .= $this->createFieldSql($field, $this->processField($spec));
|
||
if ($keys_sql = $this->createKeysSql($keys_new)) {
|
||
$query .= ', ADD ' . implode(', ADD ', $keys_sql);
|
||
}
|
||
$this->connection->query($query);
|
||
if (isset($spec['initial'])) {
|
||
$this->connection->update($table)
|
||
->fields(array($field => $spec['initial']))
|
||
->execute();
|
||
}
|
||
if ($fixnull) {
|
||
$spec['not null'] = TRUE;
|
||
$this->changeField($table, $field, $field, $spec);
|
||
}
|
||
}
|
||
|
||
public function dropField($table, $field) {
|
||
if (!$this->fieldExists($table, $field)) {
|
||
return FALSE;
|
||
}
|
||
|
||
$this->connection->query('ALTER TABLE {' . $table . '} DROP `' . $field . '`');
|
||
return TRUE;
|
||
}
|
||
|
||
public function fieldSetDefault($table, $field, $default) {
|
||
if (!$this->fieldExists($table, $field)) {
|
||
throw new DatabaseSchemaObjectDoesNotExistException(t("Cannot set default value of field @table.@field: field doesn't exist.", array('@table' => $table, '@field' => $field)));
|
||
}
|
||
|
||
if (!isset($default)) {
|
||
$default = 'NULL';
|
||
}
|
||
else {
|
||
$default = is_string($default) ? "'$default'" : $default;
|
||
}
|
||
|
||
$this->connection->query('ALTER TABLE {' . $table . '} ALTER COLUMN `' . $field . '` SET DEFAULT ' . $default);
|
||
}
|
||
|
||
public function fieldSetNoDefault($table, $field) {
|
||
if (!$this->fieldExists($table, $field)) {
|
||
throw new DatabaseSchemaObjectDoesNotExistException(t("Cannot remove default value of field @table.@field: field doesn't exist.", array('@table' => $table, '@field' => $field)));
|
||
}
|
||
|
||
$this->connection->query('ALTER TABLE {' . $table . '} ALTER COLUMN `' . $field . '` DROP DEFAULT');
|
||
}
|
||
|
||
public function indexExists($table, $name) {
|
||
// Returns one row for each column in the index. Result is string or FALSE.
|
||
// Details at http://dev.mysql.com/doc/refman/5.0/en/show-index.html
|
||
$row = $this->connection->query('SHOW INDEX FROM {' . $table . "} WHERE key_name = '$name'")->fetchAssoc();
|
||
return isset($row['Key_name']);
|
||
}
|
||
|
||
public function addPrimaryKey($table, $fields) {
|
||
if (!$this->tableExists($table)) {
|
||
throw new DatabaseSchemaObjectDoesNotExistException(t("Cannot add primary key to table @table: table doesn't exist.", array('@table' => $table)));
|
||
}
|
||
if ($this->indexExists($table, 'PRIMARY')) {
|
||
throw new DatabaseSchemaObjectExistsException(t("Cannot add primary key to table @table: primary key already exists.", array('@table' => $table)));
|
||
}
|
||
|
||
$this->connection->query('ALTER TABLE {' . $table . '} ADD PRIMARY KEY (' . $this->createKeySql($fields) . ')');
|
||
}
|
||
|
||
public function dropPrimaryKey($table) {
|
||
if (!$this->indexExists($table, 'PRIMARY')) {
|
||
return FALSE;
|
||
}
|
||
|
||
$this->connection->query('ALTER TABLE {' . $table . '} DROP PRIMARY KEY');
|
||
return TRUE;
|
||
}
|
||
|
||
public function addUniqueKey($table, $name, $fields) {
|
||
if (!$this->tableExists($table)) {
|
||
throw new DatabaseSchemaObjectDoesNotExistException(t("Cannot add unique key @name to table @table: table doesn't exist.", array('@table' => $table, '@name' => $name)));
|
||
}
|
||
if ($this->indexExists($table, $name)) {
|
||
throw new DatabaseSchemaObjectExistsException(t("Cannot add unique key @name to table @table: unique key already exists.", array('@table' => $table, '@name' => $name)));
|
||
}
|
||
|
||
$this->connection->query('ALTER TABLE {' . $table . '} ADD UNIQUE KEY `' . $name . '` (' . $this->createKeySql($fields) . ')');
|
||
}
|
||
|
||
public function dropUniqueKey($table, $name) {
|
||
if (!$this->indexExists($table, $name)) {
|
||
return FALSE;
|
||
}
|
||
|
||
$this->connection->query('ALTER TABLE {' . $table . '} DROP KEY `' . $name . '`');
|
||
return TRUE;
|
||
}
|
||
|
||
public function addIndex($table, $name, $fields) {
|
||
if (!$this->tableExists($table)) {
|
||
throw new DatabaseSchemaObjectDoesNotExistException(t("Cannot add index @name to table @table: table doesn't exist.", array('@table' => $table, '@name' => $name)));
|
||
}
|
||
if ($this->indexExists($table, $name)) {
|
||
throw new DatabaseSchemaObjectExistsException(t("Cannot add index @name to table @table: index already exists.", array('@table' => $table, '@name' => $name)));
|
||
}
|
||
|
||
$this->connection->query('ALTER TABLE {' . $table . '} ADD INDEX `' . $name . '` (' . $this->createKeySql($fields) . ')');
|
||
}
|
||
|
||
public function dropIndex($table, $name) {
|
||
if (!$this->indexExists($table, $name)) {
|
||
return FALSE;
|
||
}
|
||
|
||
$this->connection->query('ALTER TABLE {' . $table . '} DROP INDEX `' . $name . '`');
|
||
return TRUE;
|
||
}
|
||
|
||
public function changeField($table, $field, $field_new, $spec, $keys_new = array()) {
|
||
if (!$this->fieldExists($table, $field)) {
|
||
throw new DatabaseSchemaObjectDoesNotExistException(t("Cannot change the definition of field @table.@name: field doesn't exist.", array('@table' => $table, '@name' => $field)));
|
||
}
|
||
if (($field != $field_new) && $this->fieldExists($table, $field_new)) {
|
||
throw new DatabaseSchemaObjectExistsException(t("Cannot rename field @table.@name to @name_new: target field already exists.", array('@table' => $table, '@name' => $field, '@name_new' => $field_new)));
|
||
}
|
||
|
||
$sql = 'ALTER TABLE {' . $table . '} CHANGE `' . $field . '` ' . $this->createFieldSql($field_new, $this->processField($spec));
|
||
if ($keys_sql = $this->createKeysSql($keys_new)) {
|
||
$sql .= ', ADD ' . implode(', ADD ', $keys_sql);
|
||
}
|
||
$this->connection->query($sql);
|
||
}
|
||
|
||
public function prepareComment($comment, $length = NULL) {
|
||
// Work around a bug in some versions of PDO, see http://bugs.php.net/bug.php?id=41125
|
||
$comment = str_replace("'", '’', $comment);
|
||
|
||
// Truncate comment to maximum comment length.
|
||
if (isset($length)) {
|
||
// Add table prefixes before truncating.
|
||
$comment = truncate_utf8($this->connection->prefixTables($comment), $length, TRUE, TRUE);
|
||
}
|
||
|
||
return $this->connection->quote($comment);
|
||
}
|
||
|
||
/**
|
||
* Retrieve a table or column comment.
|
||
*/
|
||
public function getComment($table, $column = NULL) {
|
||
$condition = $this->buildTableNameCondition($table);
|
||
if (isset($column)) {
|
||
$condition->condition('column_name', $column);
|
||
$condition->compile($this->connection, $this);
|
||
// Don't use {} around information_schema.columns table.
|
||
return $this->connection->query("SELECT column_comment AS column_comment FROM information_schema.columns WHERE " . (string) $condition, $condition->arguments())->fetchField();
|
||
}
|
||
$condition->compile($this->connection, $this);
|
||
// Don't use {} around information_schema.tables table.
|
||
$comment = $this->connection->query("SELECT table_comment AS table_comment FROM information_schema.tables WHERE " . (string) $condition, $condition->arguments())->fetchField();
|
||
// Work-around for MySQL 5.0 bug http://bugs.mysql.com/bug.php?id=11379
|
||
return preg_replace('/; InnoDB free:.*$/', '', $comment);
|
||
}
|
||
|
||
public function tableExists($table) {
|
||
// The information_schema table is very slow to query under MySQL 5.0.
|
||
// Instead, we try to select from the table in question. If it fails,
|
||
// the most likely reason is that it does not exist. That is dramatically
|
||
// faster than using information_schema.
|
||
// @link http://bugs.mysql.com/bug.php?id=19588
|
||
// @todo: This override should be removed once we require a version of MySQL
|
||
// that has that bug fixed.
|
||
try {
|
||
$this->connection->queryRange("SELECT 1 FROM {" . $table . "}", 0, 1);
|
||
return TRUE;
|
||
}
|
||
catch (Exception $e) {
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
public function fieldExists($table, $column) {
|
||
// The information_schema table is very slow to query under MySQL 5.0.
|
||
// Instead, we try to select from the table and field in question. If it
|
||
// fails, the most likely reason is that it does not exist. That is
|
||
// dramatically faster than using information_schema.
|
||
// @link http://bugs.mysql.com/bug.php?id=19588
|
||
// @todo: This override should be removed once we require a version of MySQL
|
||
// that has that bug fixed.
|
||
try {
|
||
$this->connection->queryRange("SELECT $column FROM {" . $table . "}", 0, 1);
|
||
return TRUE;
|
||
}
|
||
catch (Exception $e) {
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* @} End of "addtogroup schemaapi".
|
||
*/
|