public class

TimesTenDialect

extends Dialect
java.lang.Object
   ↳ org.hibernate.dialect.Dialect
     ↳ org.hibernate.dialect.TimesTenDialect

Class Overview

A SQL dialect for TimesTen 5.1. Known limitations: joined-subclass support because of no CASE support in TimesTen No support for subqueries that includes aggregation - size() in HQL not supported - user queries that does subqueries with aggregation No CLOB/BLOB support No cascade delete support. No Calendar support No support for updating primary keys.

Summary

[Expand]
Inherited Constants
From class org.hibernate.dialect.Dialect
Public Constructors
TimesTenDialect()
Public Methods
JoinFragment createOuterJoinFragment()
Create a JoinFragment strategy responsible for handling this dialect's variations in how joins are handled.
boolean dropConstraints()
Do we need to drop constraints before dropping tables in this dialect?
String generateTemporaryTableName(String baseTableName)
Generate a temporary table name given the base table.
String getAddColumnString()
The syntax used to add a column to a table (optional).
String getCreateSequenceString(String sequenceName)
Typically dialects which support sequences can create a sequence with a single command.
String getCreateTemporaryTablePostfix()
Get any fragments needing to be postfixed to the command for temporary table creation.
String getCreateTemporaryTableString()
Command used to create a temporary table.
String getCrossJoinSeparator()
Get the separator to use for defining cross joins when translating HQL queries.
String getCurrentTimestampSelectString()
Retrieve the command used to retrieve the current timestamp from the database.
String getDropSequenceString(String sequenceName)
Typically dialects which support sequences can drop a sequence with a single command.
String getForUpdateString()
Get the string to append to SELECT statements to acquire locks for this dialect.
String getLimitString(String querySelect, int offset, int limit)
Given a limit and an offset, apply the limit clause to the query.
LockingStrategy getLockingStrategy(Lockable lockable, LockMode lockMode)
Get a strategy instance which knows how to acquire a database-level lock of the specified mode for this dialect.
String getQuerySequencesString()
Get the select command used retrieve the names of all sequences.
String getSelectSequenceNextValString(String sequenceName)
Generate the select expression fragment that will retrieve the next value of a sequence as part of another (typically DML) statement.
String getSequenceNextValString(String sequenceName)
Generate the appropriate select statement to to retrieve the next value of a sequence.
boolean isCurrentTimestampSelectStringCallable()
Should the value returned by getCurrentTimestampSelectString() be treated as callable.
boolean qualifyIndexName()
Do we need to qualify index names with the schema name?
boolean supportsColumnCheck()
Does this dialect support column-level check constraints?
boolean supportsCurrentTimestampSelection()
Does this dialect support a way to retrieve the database's current timestamp value?
boolean supportsEmptyInList()
Does this dialect support empty IN lists?

For example, is [where XYZ in ()] a supported construct?

boolean supportsLimit()
Does this dialect support some form of limiting query results via a SQL clause?
boolean supportsLimitOffset()
Does this dialect's LIMIT support (if any) additionally support specifying an offset?
boolean supportsSequences()
Does this dialect support sequences?
boolean supportsTableCheck()
Does this dialect support table-level check constraints?
boolean supportsTemporaryTables()
Does this dialect support temporary tables?
boolean supportsUnique()
Does this dialect support the UNIQUE column syntax?
boolean supportsUniqueConstraintInCreateAlterTable()
Does this dialect support adding Unique constraints via create and alter table ?
boolean supportsVariableLimit()
Does this dialect support bind variables (i.e., prepared statement parameters) for its limit/offset?
boolean useMaxForLimit()
Does the LIMIT clause take a "maximum" row number instead of a total number of returned rows?

This is easiest understood via an example.

[Expand]
Inherited Methods
From class org.hibernate.dialect.Dialect
From class java.lang.Object

Public Constructors

public TimesTenDialect ()

Public Methods

public JoinFragment createOuterJoinFragment ()

Create a JoinFragment strategy responsible for handling this dialect's variations in how joins are handled.

Returns

public boolean dropConstraints ()

Do we need to drop constraints before dropping tables in this dialect?

Returns
  • True if constraints must be dropped prior to dropping the table; false otherwise.

public String generateTemporaryTableName (String baseTableName)

Generate a temporary table name given the base table.

Parameters
baseTableName The table name from which to base the temp table name.
Returns
  • The generated temp table name.

public String getAddColumnString ()

The syntax used to add a column to a table (optional).

Returns
  • The "add column" fragment.

public String getCreateSequenceString (String sequenceName)

Typically dialects which support sequences can create a sequence with a single command. This is convenience form of getCreateSequenceStrings(String) to help facilitate that.

Dialects which support sequences and can create a sequence in a single command need *only* override this method. Dialects which support sequences but require multiple commands to create a sequence should instead override getCreateSequenceStrings(String).

Parameters
sequenceName The name of the sequence
Returns
  • The sequence creation command

public String getCreateTemporaryTablePostfix ()

Get any fragments needing to be postfixed to the command for temporary table creation.

Returns
  • Any required postfix.

public String getCreateTemporaryTableString ()

Command used to create a temporary table.

Returns
  • The command used to create a temporary table.

public String getCrossJoinSeparator ()

Get the separator to use for defining cross joins when translating HQL queries.

Typically this will be either [ cross join ] or [, ]

Note that the spaces are important!

public String getCurrentTimestampSelectString ()

Retrieve the command used to retrieve the current timestamp from the database.

Returns
  • The command.

public String getDropSequenceString (String sequenceName)

Typically dialects which support sequences can drop a sequence with a single command. This is convenience form of getDropSequenceStrings(String) to help facilitate that.

Dialects which support sequences and can drop a sequence in a single command need *only* override this method. Dialects which support sequences but require multiple commands to drop a sequence should instead override getDropSequenceStrings(String).

Parameters
sequenceName The name of the sequence
Returns
  • The sequence drop commands

public String getForUpdateString ()

Get the string to append to SELECT statements to acquire locks for this dialect.

Returns
  • The appropriate FOR UPDATE clause string.

public String getLimitString (String querySelect, int offset, int limit)

Given a limit and an offset, apply the limit clause to the query.

Parameters
querySelect The query to which to apply the limit.
offset The offset of the limit
limit The limit of the limit ;)
Returns
  • The modified query statement with the limit applied.

public LockingStrategy getLockingStrategy (Lockable lockable, LockMode lockMode)

Get a strategy instance which knows how to acquire a database-level lock of the specified mode for this dialect.

Parameters
lockable The persister for the entity to be locked.
lockMode The type of lock to be acquired.
Returns
  • The appropriate locking strategy.

public String getQuerySequencesString ()

Get the select command used retrieve the names of all sequences.

Returns
  • The select command; or null if sequences are not supported.

public String getSelectSequenceNextValString (String sequenceName)

Generate the select expression fragment that will retrieve the next value of a sequence as part of another (typically DML) statement.

This differs from getSequenceNextValString(String) in that this should return an expression usable within another statement.

Parameters
sequenceName the name of the sequence
Returns
  • The "nextval" fragment.

public String getSequenceNextValString (String sequenceName)

Generate the appropriate select statement to to retrieve the next value of a sequence.

This should be a "stand alone" select statement.

Parameters
sequenceName the name of the sequence
Returns
  • String The "nextval" select string.

public boolean isCurrentTimestampSelectStringCallable ()

Should the value returned by getCurrentTimestampSelectString() be treated as callable. Typically this indicates that JDBC escape syntax is being used...

Returns

public boolean qualifyIndexName ()

Do we need to qualify index names with the schema name?

Returns
  • boolean

public boolean supportsColumnCheck ()

Does this dialect support column-level check constraints?

Returns
  • True if column-level CHECK constraints are supported; false otherwise.

public boolean supportsCurrentTimestampSelection ()

Does this dialect support a way to retrieve the database's current timestamp value?

Returns
  • True if the current timestamp can be retrieved; false otherwise.

public boolean supportsEmptyInList ()

Does this dialect support empty IN lists?

For example, is [where XYZ in ()] a supported construct?

Returns
  • True if empty in lists are supported; false otherwise.

public boolean supportsLimit ()

Does this dialect support some form of limiting query results via a SQL clause?

Returns
  • True if this dialect supports some form of LIMIT.

public boolean supportsLimitOffset ()

Does this dialect's LIMIT support (if any) additionally support specifying an offset?

Returns
  • True if the dialect supports an offset within the limit support.

public boolean supportsSequences ()

Does this dialect support sequences?

Returns
  • True if sequences supported; false otherwise.

public boolean supportsTableCheck ()

Does this dialect support table-level check constraints?

Returns
  • True if table-level CHECK constraints are supported; false otherwise.

public boolean supportsTemporaryTables ()

Does this dialect support temporary tables?

Returns
  • True if temp tables are supported; false otherwise.

public boolean supportsUnique ()

Does this dialect support the UNIQUE column syntax?

Returns
  • boolean

public boolean supportsUniqueConstraintInCreateAlterTable ()

Does this dialect support adding Unique constraints via create and alter table ?

Returns
  • boolean

public boolean supportsVariableLimit ()

Does this dialect support bind variables (i.e., prepared statement parameters) for its limit/offset?

Returns
  • True if bind variables can be used; false otherwise.

public boolean useMaxForLimit ()

Does the LIMIT clause take a "maximum" row number instead of a total number of returned rows?

This is easiest understood via an example. Consider you have a table with 20 rows, but you only want to retrieve rows number 11 through 20. Generally, a limit with offset would say that the offset = 11 and the limit = 10 (we only want 10 rows at a time); this is specifying the total number of returned rows. Some dialects require that we instead specify offset = 11 and limit = 20, where 20 is the "last" row we want relative to offset (i.e. total number of rows = 20 - 11 = 9)

So essentially, is limit relative from offset? Or is limit absolute?

Returns
  • True if limit is relative from offset; false otherwise.