org.ujorm.orm.dialect

Class MySqlDialect

java.lang.Object

org.ujorm.orm.SqlDialect

org.ujorm.orm.dialect.MySqlDialect

public class MySqlDialect
extends SqlDialect

Dialect for the MySQL since release 5.0 for the InnoDB engine.
http://dev.mysql.com/

Field Summary

Fields

Modifier and Type	Field and Description
static int	VARCHAR_MAX_LENGTH The Max length of VARCHAR database type

Fields inherited from class org.ujorm.orm.SqlDialect

COMMON_SEQ_TABLE_KEY, DEFAULT_SCHEMA_SYMBOL, ormHandler

Constructor Summary

Constructors

Constructor and Description
MySqlDialect()

Method Summary

Methods

Modifier and Type	Method and Description
protected String	getColumnType(MetaColumn column) MySQL dialect uses a database type DATETIME (instead of the TIMESTAMP) for the java.util.Date.
protected String	getEngine(MetaTable table) Returns a MySQL enginge.
String	getJdbcDriver() Returns a JDBC driver class name.
String	getJdbcUrl() Returns a default JDBC URL
boolean	isCatalog() Does the database support a catalog? The feature supports: MySqlDialect and MSSqlDialect.
Appendable	printComment(MetaColumn column, Appendable out) Important note for MySQL: the change of column modifies all another column attributes so the comment update can revert some hand-made changes different from meta-model. See the official MySQL documentation for more information.
Appendable	printComment(MetaTable table, Appendable out) Print a Comment on the table
Appendable	printDelete(CriterionDecoder decoder, Appendable out) Print an SQL DELETE statement.
Appendable	printQuotedNameAlways(CharSequence name, Appendable sql) Prints quoted name (identifier) to SQL always.
Appendable	printSequenceTable(MetaDatabase db, Appendable out) Print SQL CREATE SEQUENCE.
Appendable	printTable(MetaTable table, Appendable out) Print a SQL sript to create table
Appendable	printUpdate(List<MetaColumn> changedColumns, CriterionDecoder decoder, Appendable out) Print an SQL UPDATE statement.
protected Appendable	printWhere(CriterionDecoder decoder, TableWrapper[] tables, Appendable out) Print where condition for DELETE / UPDATE TODO: FIX THE IMPLEMENTATION - probably in the CriterionDecoder class

Methods inherited from class org.ujorm.orm.SqlDialect

createConnection, createJndiInitialContext, createSubQuery, escape, getAliasColumnName, getCriterionTemplate, getExtentedDialect, getKeywordSet, getNameProvider, getQuotedName, getSeqTableModel, isColumnLengthAllowed, isFilled, isMultiRowInsertSupported, printAlterTableAddColumn, printAlterTableColumn, printCall, printColumnAlias, printColumnDeclaration, printCommit, printCreateSchema, printCriterion, printCriterionValue, printDefaultConstraint, printDefaultSchema, printDefaultValue, printFKColumnsDeclaration, printForeignKey, printForeignKey, printFullTableName, printFullTableName, printIndex, printInsert, printInsert, printInsertBySelect, println, printLockForSelect, printOffset, printQuotedName, printSelect, printSelectOrder, printSelectTable, printSelectTableBase, printSelectView, printSequenceCurrentValue, printSequenceDeleteById, printSequenceInit, printSequenceInitWithValues, printSequenceNextValue, printSequenceTableName, printSetMaxSequence, printTableAliasDefinition, printTableColumns, releaseSavepoint, setHandler

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

VARCHAR_MAX_LENGTH

public static final int VARCHAR_MAX_LENGTH

The Max length of VARCHAR database type

See Also:

Constant Field Values

Constructor Detail

MySqlDialect

public MySqlDialect()

Method Detail

getJdbcUrl

public String getJdbcUrl()

Description copied from class: SqlDialect

Returns a default JDBC URL

Specified by:

getJdbcUrl in class SqlDialect

getJdbcDriver

public String getJdbcDriver()

Description copied from class: SqlDialect

Returns a JDBC driver class name.

Specified by:

getJdbcDriver in class SqlDialect

isCatalog

public boolean isCatalog()

Does the database support a catalog? The feature supports: MySqlDialect and MSSqlDialect.

Overrides:

isCatalog in class SqlDialect

Returns:

The default value is true.

printDelete

public Appendable printDelete(CriterionDecoder decoder,
                     Appendable out)
                       throws IOException

Print an SQL DELETE statement.

Overrides:

printDelete in class SqlDialect

Throws:

IOException

printUpdate

public Appendable printUpdate(List<MetaColumn> changedColumns,
                     CriterionDecoder decoder,
                     Appendable out)
                       throws IOException

Description copied from class: SqlDialect

Print an SQL UPDATE statement.

Overrides:

printUpdate in class SqlDialect

Throws:

IOException

printWhere

protected Appendable printWhere(CriterionDecoder decoder,
                    TableWrapper[] tables,
                    Appendable out)
                         throws IOException

Print where condition for DELETE / UPDATE TODO: FIX THE IMPLEMENTATION - probably in the CriterionDecoder class

Throws:

IOException

printSequenceTable

public Appendable printSequenceTable(MetaDatabase db,
                            Appendable out)
                              throws IOException

Description copied from class: SqlDialect

Print SQL CREATE SEQUENCE. No JDBC parameters.

Overrides:

printSequenceTable in class SqlDialect

Throws:

IOException

printTable

public Appendable printTable(MetaTable table,
                    Appendable out)
                      throws IOException

Description copied from class: SqlDialect

Print a SQL sript to create table

Overrides:

printTable in class SqlDialect

Throws:

IOException

getEngine

protected String getEngine(MetaTable table)

Returns a MySQL enginge.
The default value is " ENGINE = InnoDB".

getColumnType

protected String getColumnType(MetaColumn column)

MySQL dialect uses a database type DATETIME (instead of the TIMESTAMP) for the java.util.Date.

Overrides:

getColumnType in class SqlDialect

printComment

public Appendable printComment(MetaTable table,
                      Appendable out)
                        throws IOException

Print a Comment on the table

Overrides:

printComment in class SqlDialect

Throws:

IOException

printComment

public Appendable printComment(MetaColumn column,
                      Appendable out)
                        throws IOException

Important note for MySQL: the change of column modifies all another column attributes so the comment update can revert some hand-made changes different from meta-model.
See the official MySQL documentation for more information. The column comments can be suppresed by the overwritting the method with an empty body.

Overrides:

printComment in class SqlDialect

Throws:

IOException

printQuotedNameAlways

public Appendable printQuotedNameAlways(CharSequence name,
                               Appendable sql)
                                 throws IOException

Prints quoted name (identifier) to SQL always. The default quated character is '"', however different SQL dialects must have got a different character-pairs.

Overrides:

printQuotedNameAlways in class SqlDialect

Parameters:

name - Name (identifier) for quoting

sql - Target SQL for printing new quoted name

Returns:

SQL with printed quoted name

Throws:

IOException