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PhabricatorConfigSchemaQuery.php
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Wed, Apr 2, 03:14

PhabricatorConfigSchemaQuery.php
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<?php
final class PhabricatorConfigSchemaQuery extends Phobject {
private $api;
public function setAPI(PhabricatorStorageManagementAPI $api) {
$this->api = $api;
return $this;
}
protected function getAPI() {
if (!$this->api) {
throw new Exception(pht('Call setAPI() before issuing a query!'));
}
return $this->api;
}
protected function getConn() {
return $this->getAPI()->getConn(null);
}
private function getDatabaseNames() {
$api = $this->getAPI();
$patches = PhabricatorSQLPatchList::buildAllPatches();
return $api->getDatabaseList(
$patches,
$only_living = true);
}
public function loadActualSchema() {
$databases = $this->getDatabaseNames();
$conn = $this->getConn();
$tables = queryfx_all(
$conn,
'SELECT TABLE_SCHEMA, TABLE_NAME, TABLE_COLLATION
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA IN (%Ls)',
$databases);
$database_info = queryfx_all(
$conn,
'SELECT SCHEMA_NAME, DEFAULT_CHARACTER_SET_NAME, DEFAULT_COLLATION_NAME
FROM INFORMATION_SCHEMA.SCHEMATA
WHERE SCHEMA_NAME IN (%Ls)',
$databases);
$database_info = ipull($database_info, null, 'SCHEMA_NAME');
$sql = array();
foreach ($tables as $table) {
$sql[] = qsprintf(
$conn,
'(TABLE_SCHEMA = %s AND TABLE_NAME = %s)',
$table['TABLE_SCHEMA'],
$table['TABLE_NAME']);
}
if ($sql) {
$column_info = queryfx_all(
$conn,
'SELECT TABLE_SCHEMA, TABLE_NAME, COLUMN_NAME, CHARACTER_SET_NAME,
COLLATION_NAME, COLUMN_TYPE, IS_NULLABLE
FROM INFORMATION_SCHEMA.COLUMNS
WHERE (%Q)',
'('.implode(') OR (', $sql).')');
$column_info = igroup($column_info, 'TABLE_SCHEMA');
} else {
$column_info = array();
}
// NOTE: Tables like KEY_COLUMN_USAGE and TABLE_CONSTRAINTS only contain
// primary, unique, and foreign keys, so we can't use them here. We pull
// indexes later on using SHOW INDEXES.
$server_schema = new PhabricatorConfigServerSchema();
$tables = igroup($tables, 'TABLE_SCHEMA');
foreach ($tables as $database_name => $database_tables) {
$info = $database_info[$database_name];
$database_schema = id(new PhabricatorConfigDatabaseSchema())
->setName($database_name)
->setCharacterSet($info['DEFAULT_CHARACTER_SET_NAME'])
->setCollation($info['DEFAULT_COLLATION_NAME']);
$database_column_info = idx($column_info, $database_name, array());
$database_column_info = igroup($database_column_info, 'TABLE_NAME');
foreach ($database_tables as $table) {
$table_name = $table['TABLE_NAME'];
$table_schema = id(new PhabricatorConfigTableSchema())
->setName($table_name)
->setCollation($table['TABLE_COLLATION']);
$columns = idx($database_column_info, $table_name, array());
foreach ($columns as $column) {
$column_schema = id(new PhabricatorConfigColumnSchema())
->setName($column['COLUMN_NAME'])
->setCharacterSet($column['CHARACTER_SET_NAME'])
->setCollation($column['COLLATION_NAME'])
->setColumnType($column['COLUMN_TYPE'])
->setNullable($column['IS_NULLABLE'] == 'YES');
$table_schema->addColumn($column_schema);
}
$key_parts = queryfx_all(
$conn,
'SHOW INDEXES FROM %T.%T',
$database_name,
$table_name);
$keys = igroup($key_parts, 'Key_name');
foreach ($keys as $key_name => $key_pieces) {
$key_pieces = isort($key_pieces, 'Seq_in_index');
$head = head($key_pieces);
// This handles string indexes which index only a prefix of a field.
$column_names = array();
foreach ($key_pieces as $piece) {
$name = $piece['Column_name'];
if ($piece['Sub_part']) {
$name = $name.'('.$piece['Sub_part'].')';
}
$column_names[] = $name;
}
$key_schema = id(new PhabricatorConfigKeySchema())
->setName($key_name)
->setColumnNames($column_names)
->setUnique(!$head['Non_unique'])
->setIndexType($head['Index_type']);
$table_schema->addKey($key_schema);
}
$database_schema->addTable($table_schema);
}
$server_schema->addDatabase($database_schema);
}
return $server_schema;
}
public function loadExpectedSchema() {
$databases = $this->getDatabaseNames();
$api = $this->getAPI();
if ($api->isCharacterSetAvailable('utf8mb4')) {
// If utf8mb4 is available, we use it with the utf8mb4_unicode_ci
// collation. This is most correct, and will sort properly.
$utf8_charset = 'utf8mb4';
$utf8_collation = 'utf8mb4_unicode_ci';
} else {
// If utf8mb4 is not available, we use binary. This allows us to store
// 4-byte unicode characters. This has some tradeoffs:
//
// Unicode characters won't sort correctly. There's nothing we can do
// about this while still supporting 4-byte characters.
//
// It's possible that strings will be truncated in the middle of a
// character on insert. We encourage users to set STRICT_ALL_TABLES
// to prevent this.
$utf8_charset = 'binary';
$utf8_collation = 'binary';
}
$specs = id(new PhutilSymbolLoader())
->setAncestorClass('PhabricatorConfigSchemaSpec')
->loadObjects();
$server_schema = new PhabricatorConfigServerSchema();
foreach ($specs as $spec) {
$spec
->setUTF8Collation($utf8_collation)
->setUTF8Charset($utf8_charset)
->setServer($server_schema)
->buildSchemata($server_schema);
}
return $server_schema;
}
public function buildComparisonSchema(
PhabricatorConfigServerSchema $expect,
PhabricatorConfigServerSchema $actual) {
$comp_server = $actual->newEmptyClone();
$all_databases = $actual->getDatabases() + $expect->getDatabases();
foreach ($all_databases as $database_name => $database_template) {
$actual_database = $actual->getDatabase($database_name);
$expect_database = $expect->getDatabase($database_name);
$issues = $this->compareSchemata($expect_database, $actual_database);
$comp_database = $database_template->newEmptyClone()
->setIssues($issues);
if (!$actual_database) {
$actual_database = $expect_database->newEmptyClone();
}
if (!$expect_database) {
$expect_database = $actual_database->newEmptyClone();
}
$all_tables =
$actual_database->getTables() +
$expect_database->getTables();
foreach ($all_tables as $table_name => $table_template) {
$actual_table = $actual_database->getTable($table_name);
$expect_table = $expect_database->getTable($table_name);
$issues = $this->compareSchemata($expect_table, $actual_table);
$comp_table = $table_template->newEmptyClone()
->setIssues($issues);
if (!$actual_table) {
$actual_table = $expect_table->newEmptyClone();
}
if (!$expect_table) {
$expect_table = $actual_table->newEmptyClone();
}
$all_columns =
$actual_table->getColumns() +
$expect_table->getColumns();
foreach ($all_columns as $column_name => $column_template) {
$actual_column = $actual_table->getColumn($column_name);
$expect_column = $expect_table->getColumn($column_name);
$issues = $this->compareSchemata($expect_column, $actual_column);
$comp_column = $column_template->newEmptyClone()
->setIssues($issues);
$comp_table->addColumn($comp_column);
}
$all_keys =
$actual_table->getKeys() +
$expect_table->getKeys();
foreach ($all_keys as $key_name => $key_template) {
$actual_key = $actual_table->getKey($key_name);
$expect_key = $expect_table->getKey($key_name);
$issues = $this->compareSchemata($expect_key, $actual_key);
$comp_key = $key_template->newEmptyClone()
->setIssues($issues);
$comp_table->addKey($comp_key);
}
$comp_database->addTable($comp_table);
}
$comp_server->addDatabase($comp_database);
}
return $comp_server;
}
private function compareSchemata(
PhabricatorConfigStorageSchema $expect = null,
PhabricatorConfigStorageSchema $actual = null) {
$expect_is_key = ($expect instanceof PhabricatorConfigKeySchema);
$actual_is_key = ($actual instanceof PhabricatorConfigKeySchema);
if ($expect_is_key || $actual_is_key) {
$missing_issue = PhabricatorConfigStorageSchema::ISSUE_MISSINGKEY;
$surplus_issue = PhabricatorConfigStorageSchema::ISSUE_SURPLUSKEY;
} else {
$missing_issue = PhabricatorConfigStorageSchema::ISSUE_MISSING;
$surplus_issue = PhabricatorConfigStorageSchema::ISSUE_SURPLUS;
}
if (!$expect && !$actual) {
throw new Exception(pht('Can not compare two missing schemata!'));
} else if ($expect && !$actual) {
$issues = array($missing_issue);
} else if ($actual && !$expect) {
$issues = array($surplus_issue);
} else {
$issues = $actual->compareTo($expect);
}
return $issues;
}
}

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