Abstract Class yii\db\Schema
| Inheritance | yii\db\Schema » yii\base\BaseObject |
|---|---|
| Implements | yii\base\Configurable |
| Subclasses | yii\db\cubrid\Schema, yii\db\mssql\Schema, yii\db\mysql\Schema, yii\db\oci\Schema, yii\db\pgsql\Schema, yii\db\sqlite\Schema |
| Available since version | 2.0 |
| Source Code | https://github.com/yiisoft/yii2/blob/master/framework/db/Schema.php |
Schema is the base class for concrete DBMS-specific schema classes.
Schema represents the database schema information that is DBMS specific.
Public Properties
| Property | Type | Description | Defined By |
|---|---|---|---|
| $columnSchemaClass | string|array | Column schema class or class config | yii\db\Schema |
| $db | yii\db\Connection | The database connection | yii\db\Schema |
| $defaultSchema | string | The default schema name used for the current session. | yii\db\Schema |
| $exceptionMap | array | Map of DB errors and corresponding exceptions If left part is found in DB error message exception class from the right part is used. | yii\db\Schema |
| $lastInsertID | string | The row ID of the last row inserted, or the last value retrieved from the sequence object | yii\db\Schema |
| $queryBuilder | yii\db\QueryBuilder | The query builder for this connection. | yii\db\Schema |
| $schemaNames | string[] | All schema names in the database, except system schemas. | yii\db\Schema |
| $serverVersion | string | Server version as a string. | yii\db\Schema |
| $tableNames | string[] | All table names in the database. | yii\db\Schema |
| $tableSchemas | yii\db\TableSchema[] | The metadata for all tables in the database. | yii\db\Schema |
| $transactionIsolationLevel | string | The transaction isolation level to use for this transaction. | yii\db\Schema |
Protected Properties
| Property | Type | Description | Defined By |
|---|---|---|---|
| $columnQuoteCharacter | string|string[] | Character used to quote column names. | yii\db\Schema |
| $tableQuoteCharacter | string|string[] | Character used to quote schema, table, etc. | yii\db\Schema |
Public Methods
| Method | Description | Defined By |
|---|---|---|
| __call() | Calls the named method which is not a class method. | yii\base\BaseObject |
| __construct() | Constructor. | yii\base\BaseObject |
| __get() | Returns the value of an object property. | yii\base\BaseObject |
| __isset() | Checks if a property is set, i.e. defined and not null. | yii\base\BaseObject |
| __set() | Sets value of an object property. | yii\base\BaseObject |
| __unset() | Sets an object property to null. | yii\base\BaseObject |
| canGetProperty() | Returns a value indicating whether a property can be read. | yii\base\BaseObject |
| canSetProperty() | Returns a value indicating whether a property can be set. | yii\base\BaseObject |
| className() | Returns the fully qualified name of this class. | yii\base\BaseObject |
| convertException() | Converts a DB exception to a more concrete one if possible. | yii\db\Schema |
| createColumnSchemaBuilder() | Create a column schema builder instance giving the type and value precision. | yii\db\Schema |
| createQueryBuilder() | Creates a query builder for the database. | yii\db\Schema |
| createSavepoint() | Creates a new savepoint. | yii\db\Schema |
| findUniqueIndexes() | Returns all unique indexes for the given table. | yii\db\Schema |
| getLastInsertID() | Returns the ID of the last inserted row or sequence value. | yii\db\Schema |
| getPdoType() | Determines the PDO type for the given PHP data value. | yii\db\Schema |
| getQueryBuilder() | yii\db\Schema | |
| getRawTableName() | Returns the actual name of a given table name. | yii\db\Schema |
| getSchemaNames() | Returns all schema names in the database, except system schemas. | yii\db\Schema |
| getServerVersion() | Returns a server version as a string comparable by \version_compare(). | yii\db\Schema |
| getTableNames() | Returns all table names in the database. | yii\db\Schema |
| getTableSchema() | Obtains the metadata for the named table. | yii\db\Schema |
| getTableSchemas() | Returns the metadata for all tables in the database. | yii\db\Schema |
| hasMethod() | Returns a value indicating whether a method is defined. | yii\base\BaseObject |
| hasProperty() | Returns a value indicating whether a property is defined. | yii\base\BaseObject |
| init() | Initializes the object. | yii\base\BaseObject |
| insert() | Executes the INSERT command, returning primary key values. | yii\db\Schema |
| isReadQuery() | Returns a value indicating whether a SQL statement is for read purpose. | yii\db\Schema |
| quoteColumnName() | Quotes a column name for use in a query. | yii\db\Schema |
| quoteSimpleColumnName() | Quotes a simple column name for use in a query. | yii\db\Schema |
| quoteSimpleTableName() | Quotes a simple table name for use in a query. | yii\db\Schema |
| quoteTableName() | Quotes a table name for use in a query. | yii\db\Schema |
| quoteValue() | Quotes a string value for use in a query. | yii\db\Schema |
| refresh() | Refreshes the schema. | yii\db\Schema |
| refreshTableSchema() | Refreshes the particular table schema. | yii\db\Schema |
| releaseSavepoint() | Releases an existing savepoint. | yii\db\Schema |
| rollBackSavepoint() | Rolls back to a previously created savepoint. | yii\db\Schema |
| setTransactionIsolationLevel() | Sets the isolation level of the current transaction. | yii\db\Schema |
| supportsSavepoint() | yii\db\Schema | |
| unquoteSimpleColumnName() | Unquotes a simple column name. | yii\db\Schema |
| unquoteSimpleTableName() | Unquotes a simple table name. | yii\db\Schema |
Protected Methods
| Method | Description | Defined By |
|---|---|---|
| createColumnSchema() | Creates a column schema for the database. | yii\db\Schema |
| findSchemaNames() | Returns all schema names in the database, including the default one but not system schemas. | yii\db\Schema |
| findTableNames() | Returns all table names in the database. | yii\db\Schema |
| getCacheKey() | Returns the cache key for the specified table name. | yii\db\Schema |
| getCacheTag() | Returns the cache tag name. | yii\db\Schema |
| getColumnPhpType() | Extracts the PHP type from abstract DB type. | yii\db\Schema |
| getSchemaMetadata() | Returns the metadata of the given type for all tables in the given schema. | yii\db\Schema |
| getTableMetadata() | Returns the metadata of the given type for the given table. | yii\db\Schema |
| loadTableSchema() | Loads the metadata for the specified table. | yii\db\Schema |
| normalizePdoRowKeyCase() | Changes row's array key case to lower if PDO's one is set to uppercase. | yii\db\Schema |
| resolveTableName() | Resolves the table name and schema name (if any). | yii\db\Schema |
| setTableMetadata() | Sets the metadata of the given type for the given table. | yii\db\Schema |
Constants
| Constant | Value | Description | Defined By |
|---|---|---|---|
| SCHEMA_CACHE_VERSION | 1 | Schema cache version, to detect incompatibilities in cached values when the data format of the cache changes. | yii\db\Schema |
| TYPE_BIGINT | 'bigint' | yii\db\Schema | |
| TYPE_BIGPK | 'bigpk' | yii\db\Schema | |
| TYPE_BINARY | 'binary' | yii\db\Schema | |
| TYPE_BOOLEAN | 'boolean' | yii\db\Schema | |
| TYPE_CHAR | 'char' | yii\db\Schema | |
| TYPE_DATE | 'date' | yii\db\Schema | |
| TYPE_DATETIME | 'datetime' | yii\db\Schema | |
| TYPE_DECIMAL | 'decimal' | yii\db\Schema | |
| TYPE_DOUBLE | 'double' | yii\db\Schema | |
| TYPE_FLOAT | 'float' | yii\db\Schema | |
| TYPE_INTEGER | 'integer' | yii\db\Schema | |
| TYPE_JSON | 'json' | yii\db\Schema | |
| TYPE_MONEY | 'money' | yii\db\Schema | |
| TYPE_PK | 'pk' | yii\db\Schema | |
| TYPE_SMALLINT | 'smallint' | yii\db\Schema | |
| TYPE_STRING | 'string' | yii\db\Schema | |
| TYPE_TEXT | 'text' | yii\db\Schema | |
| TYPE_TIME | 'time' | yii\db\Schema | |
| TYPE_TIMESTAMP | 'timestamp' | yii\db\Schema | |
| TYPE_TINYINT | 'tinyint' | yii\db\Schema | |
| TYPE_UBIGPK | 'ubigpk' | yii\db\Schema | |
| TYPE_UPK | 'upk' | yii\db\Schema |
Property Details
Character used to quote column names. An array of 2 characters can be used in case starting and ending characters are different.
Column schema class or class config
The database connection
The default schema name used for the current session.
Map of DB errors and corresponding exceptions If left part is found in DB error message exception class from the right part is used.
The row ID of the last row inserted, or the last value retrieved from the sequence object
The query builder for this connection.
All schema names in the database, except system schemas.
Server version as a string.
All table names in the database.
Character used to quote schema, table, etc. names. An array of 2 characters can be used in case starting and ending characters are different.
The metadata for all tables in the database. Each array element is an instance of yii\db\TableSchema or its child class.
The transaction isolation level to use for this transaction.
This can be one of yii\db\Transaction::READ_UNCOMMITTED, yii\db\Transaction::READ_COMMITTED, yii\db\Transaction::REPEATABLE_READ
and yii\db\Transaction::SERIALIZABLE but also a string containing DBMS specific syntax to be used
after SET TRANSACTION ISOLATION LEVEL.
Method Details
Converts a DB exception to a more concrete one if possible.
| public yii\db\Exception convertException ( Exception $e, $rawSql ) | ||
| $e | Exception | |
| $rawSql | string | SQL that produced exception |
Creates a column schema for the database.
This method may be overridden by child classes to create a DBMS-specific column schema.
| protected yii\db\ColumnSchema createColumnSchema ( ) | ||
| return | yii\db\ColumnSchema | Column schema instance. |
|---|---|---|
| throws | yii\base\InvalidConfigException | if a column schema class cannot be created. |
Create a column schema builder instance giving the type and value precision.
This method may be overridden by child classes to create a DBMS-specific column schema builder.
| public yii\db\ColumnSchemaBuilder createColumnSchemaBuilder ( $type, $length = null ) | ||
| $type | string | Type of the column. See yii\db\ColumnSchemaBuilder::$type. |
| $length | integer|string|array | Length or precision of the column. See yii\db\ColumnSchemaBuilder::$length. |
| return | yii\db\ColumnSchemaBuilder | Column schema builder instance |
|---|---|---|
Creates a query builder for the database.
This method may be overridden by child classes to create a DBMS-specific query builder.
| public yii\db\QueryBuilder createQueryBuilder ( ) | ||
| return | yii\db\QueryBuilder | Query builder instance |
|---|---|---|
Creates a new savepoint.
| public void createSavepoint ( $name ) | ||
| $name | string | The savepoint name |
Returns all schema names in the database, including the default one but not system schemas.
This method should be overridden by child classes in order to support this feature because the default implementation simply throws an exception.
| protected array findSchemaNames ( ) | ||
| return | array | All schema names in the database, except system schemas. |
|---|---|---|
| throws | yii\base\NotSupportedException | if this method is not supported by the DBMS. |
Returns all table names in the database.
This method should be overridden by child classes in order to support this feature because the default implementation simply throws an exception.
| protected array findTableNames ( $schema = '' ) | ||
| $schema | string | The schema of the tables. Defaults to empty string, meaning the current or default schema. |
| return | array | All table names in the database. The names have NO schema name prefix. |
|---|---|---|
| throws | yii\base\NotSupportedException | if this method is not supported by the DBMS. |
Returns all unique indexes for the given table.
Each array element is of the following structure:
[
'IndexName1' => ['col1' [, ...]],
'IndexName2' => ['col2' [, ...]],
]
This method should be overridden by child classes in order to support this feature because the default implementation simply throws an exception
| public array findUniqueIndexes ( $table ) | ||
| $table | yii\db\TableSchema | The table metadata |
| return | array | All unique indexes for the given table. |
|---|---|---|
| throws | yii\base\NotSupportedException | if this method is called |
Returns the cache key for the specified table name.
| protected mixed getCacheKey ( $name ) | ||
| $name | string | The table name. |
| return | mixed | The cache key. |
|---|---|---|
Returns the cache tag name.
This allows refresh() to invalidate all cached table schemas.
| protected string getCacheTag ( ) | ||
| return | string | The cache tag name |
|---|---|---|
Extracts the PHP type from abstract DB type.
| protected string getColumnPhpType ( $column ) | ||
| $column | yii\db\ColumnSchema | The column schema information |
| return | string | PHP type name |
|---|---|---|
Returns the ID of the last inserted row or sequence value.
See also https://secure.php.net/manual/en/function.PDO-lastInsertId.php.
| public string getLastInsertID ( $sequenceName = '' ) | ||
| $sequenceName | string | Name of the sequence object (required by some DBMS) |
| return | string | The row ID of the last row inserted, or the last value retrieved from the sequence object |
|---|---|---|
| throws | yii\base\InvalidCallException | if the DB connection is not active |
Determines the PDO type for the given PHP data value.
See also https://secure.php.net/manual/en/pdo.constants.php.
| public integer getPdoType ( $data ) | ||
| $data | mixed | The data whose PDO type is to be determined |
| return | integer | The PDO type |
|---|---|---|
| public yii\db\QueryBuilder getQueryBuilder ( ) | ||
| return | yii\db\QueryBuilder | The query builder for this connection. |
|---|---|---|
Returns the actual name of a given table name.
This method will strip off curly brackets from the given table name and replace the percentage character '%' with yii\db\Connection::$tablePrefix.
| public string getRawTableName ( $name ) | ||
| $name | string | The table name to be converted |
| return | string | The real name of the given table name |
|---|---|---|
Returns the metadata of the given type for all tables in the given schema.
This method will call a 'getTable' . ucfirst($type) named method with the table name
and the refresh flag to obtain the metadata.
| protected array getSchemaMetadata ( $schema, $type, $refresh ) | ||
| $schema | string | The schema of the metadata. Defaults to empty string, meaning the current or default schema name. |
| $type | string | Metadata type. |
| $refresh | boolean | Whether to fetch the latest available table metadata. If this is |
| return | array | Array of metadata. |
|---|---|---|
Returns all schema names in the database, except system schemas.
| public string[] getSchemaNames ( $refresh = false ) | ||
| $refresh | boolean | Whether to fetch the latest available schema names. If this is false, schema names fetched previously (if available) will be returned. |
| return | string[] | All schema names in the database, except system schemas. |
|---|---|---|
Returns a server version as a string comparable by \version_compare().
| public string getServerVersion ( ) | ||
| return | string | Server version as a string. |
|---|---|---|
Returns the metadata of the given type for the given table.
If there's no metadata in the cache, this method will call
a 'loadTable' . ucfirst($type) named method with the table name to obtain the metadata.
| protected mixed getTableMetadata ( $name, $type, $refresh ) | ||
| $name | string | Table name. The table name may contain schema name if any. Do not quote the table name. |
| $type | string | Metadata type. |
| $refresh | boolean | Whether to reload the table metadata even if it is found in the cache. |
| return | mixed | Metadata. |
|---|---|---|
Returns all table names in the database.
| public string[] getTableNames ( $schema = '', $refresh = false ) | ||
| $schema | string | The schema of the tables. Defaults to empty string, meaning the current or default schema name. If not empty, the returned table names will be prefixed with the schema name. |
| $refresh | boolean | Whether to fetch the latest available table names. If this is false, table names fetched previously (if available) will be returned. |
| return | string[] | All table names in the database. |
|---|---|---|
Obtains the metadata for the named table.
| public yii\db\TableSchema|null getTableSchema ( $name, $refresh = false ) | ||
| $name | string | Table name. The table name may contain schema name if any. Do not quote the table name. |
| $refresh | boolean | Whether to reload the table schema even if it is found in the cache. |
| return | yii\db\TableSchema|null | Table metadata. |
|---|---|---|
Returns the metadata for all tables in the database.
| public yii\db\TableSchema[] getTableSchemas ( $schema = '', $refresh = false ) | ||
| $schema | string | The schema of the tables. Defaults to empty string, meaning the current or default schema name. |
| $refresh | boolean | Whether to fetch the latest available table schemas. If this is |
| return | yii\db\TableSchema[] | The metadata for all tables in the database. Each array element is an instance of yii\db\TableSchema or its child class. |
|---|---|---|
Executes the INSERT command, returning primary key values.
| public array|false insert ( $table, $columns ) | ||
| $table | string | The table that new rows will be inserted into. |
| $columns | array | The column data (name => value) to be inserted into the table. |
| return | array|false | Primary key values or false if the command fails |
|---|---|---|
Returns a value indicating whether a SQL statement is for read purpose.
| public boolean isReadQuery ( $sql ) | ||
| $sql | string | The SQL statement |
| return | boolean | Whether a SQL statement is for read purpose. |
|---|---|---|
Loads the metadata for the specified table.
| protected abstract yii\db\TableSchema|null loadTableSchema ( $name ) | ||
| $name | string | Table name |
| return | yii\db\TableSchema|null | DBMS-dependent table metadata, |
|---|---|---|
Changes row's array key case to lower if PDO's one is set to uppercase.
| protected array normalizePdoRowKeyCase ( array $row, $multiple ) | ||
| $row | array | Row's array or an array of row's arrays. |
| $multiple | boolean | Whether multiple rows or a single row passed. |
| return | array | Normalized row or rows. |
|---|---|---|
Quotes a column name for use in a query.
If the column name contains prefix, the prefix will also be properly quoted. If the column name is already quoted or contains '(', '[[' or '{{', then this method will do nothing.
See also quoteSimpleColumnName().
| public string quoteColumnName ( $name ) | ||
| $name | string | Column name |
| return | string | The properly quoted column name |
|---|---|---|
Quotes a simple column name for use in a query.
A simple column name should contain the column name only without any prefix. If the column name is already quoted or is the asterisk character '*', this method will do nothing.
| public string quoteSimpleColumnName ( $name ) | ||
| $name | string | Column name |
| return | string | The properly quoted column name |
|---|---|---|
Quotes a simple table name for use in a query.
A simple table name should contain the table name only without any schema prefix. If the table name is already quoted, this method will do nothing.
| public string quoteSimpleTableName ( $name ) | ||
| $name | string | Table name |
| return | string | The properly quoted table name |
|---|---|---|
Quotes a table name for use in a query.
If the table name contains schema prefix, the prefix will also be properly quoted. If the table name is already quoted or contains '(' or '{{', then this method will do nothing.
See also quoteSimpleTableName().
| public string quoteTableName ( $name ) | ||
| $name | string | Table name |
| return | string | The properly quoted table name |
|---|---|---|
Quotes a string value for use in a query.
Note that if the parameter is not a string, it will be returned without change.
See also https://secure.php.net/manual/en/function.PDO-quote.php.
| public string quoteValue ( $str ) | ||
| $str | string | String to be quoted |
| return | string | The properly quoted string |
|---|---|---|
Refreshes the schema.
This method cleans up all cached table schemas so that they can be re-created later to reflect the database schema change.
| public void refresh ( ) |
Refreshes the particular table schema.
This method cleans up cached table schema so that it can be re-created later to reflect the database schema change.
| public void refreshTableSchema ( $name ) | ||
| $name | string | Table name. |
Releases an existing savepoint.
| public void releaseSavepoint ( $name ) | ||
| $name | string | The savepoint name |
Resolves the table name and schema name (if any).
| protected yii\db\TableSchema resolveTableName ( $name ) | ||
| $name | string | The table name |
| return | yii\db\TableSchema | yii\db\TableSchema with resolved table, schema, etc. names. |
|---|---|---|
| throws | yii\base\NotSupportedException | if this method is not supported by the DBMS. |
Rolls back to a previously created savepoint.
| public void rollBackSavepoint ( $name ) | ||
| $name | string | The savepoint name |
Sets the metadata of the given type for the given table.
| protected void setTableMetadata ( $name, $type, $data ) | ||
| $name | string | Table name. |
| $type | string | Metadata type. |
| $data | mixed | Metadata. |
Sets the isolation level of the current transaction.
See also http://en.wikipedia.org/wiki/Isolation_(database_systems)#Isolation_levels.
| public void setTransactionIsolationLevel ( $level ) | ||
| $level | string | The transaction isolation level to use for this transaction.
This can be one of yii\db\Transaction::READ_UNCOMMITTED, yii\db\Transaction::READ_COMMITTED, yii\db\Transaction::REPEATABLE_READ
and yii\db\Transaction::SERIALIZABLE but also a string containing DBMS specific syntax to be used
after |
| public boolean supportsSavepoint ( ) | ||
| return | boolean | Whether this DBMS supports savepoint. |
|---|---|---|
Unquotes a simple column name.
A simple column name should contain the column name only without any prefix. If the column name is not quoted or is the asterisk character '*', this method will do nothing.
| public string unquoteSimpleColumnName ( $name ) | ||
| $name | string | Column name. |
| return | string | Unquoted column name. |
|---|---|---|
Unquotes a simple table name.
A simple table name should contain the table name only without any schema prefix. If the table name is not quoted, this method will do nothing.
| public string unquoteSimpleTableName ( $name ) | ||
| $name | string | Table name. |
| return | string | Unquoted table name. |
|---|---|---|
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