java.lang.Object | ||
↳ | org.hibernate.dialect.Dialect | |
↳ | org.hibernate.dialect.MySQLDialect |
Known Direct Subclasses |
Known Indirect Subclasses |
An SQL dialect for MySQL (prior to 5.x).
[Expand]
Inherited Constants | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
From class
org.hibernate.dialect.Dialect
|
Public Constructors | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Public Methods | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Are string comparisons implicitly case insensitive.
| |||||||||||
The character specific to this dialect used to close a quoted identifier.
| |||||||||||
The syntax used to add a column to a table (optional).
| |||||||||||
The syntax used to add a foreign key constraint to a table.
| |||||||||||
Get the name of the database type appropriate for casting operations
(via the CAST() SQL function) for the given java.sql.Types typecode.
| |||||||||||
Command used to create a temporary table.
| |||||||||||
Retrieve the command used to retrieve the current timestamp from the
database.
| |||||||||||
Command used to drop a temporary table.
| |||||||||||
Get the string to append to SELECT statements to acquire locks
for this dialect.
| |||||||||||
The syntax used during DDL to define a column as being an IDENTITY.
| |||||||||||
Get the select command to use to retrieve the last generated IDENTITY
value.
| |||||||||||
Apply s limit clause to the query.
| |||||||||||
Get the string to append to SELECT statements to acquire WRITE locks
for this dialect.
| |||||||||||
Given a callable statement previously processed by
registerResultSetOutParameter(CallableStatement, int) ,
extract the ResultSet from the OUT parameter. | |||||||||||
Get the command used to select a GUID from the underlying database.
| |||||||||||
Get the string to append to SELECT statements to acquire WRITE locks
for this dialect.
| |||||||||||
Should the value returned by
getCurrentTimestampSelectString()
be treated as callable. | |||||||||||
The character specific to this dialect used to begin a quoted identifier.
| |||||||||||
Does the dialect require that temporary table DDL statements occur in
isolation from other statements? This would be the case if the creation
would cause any current transaction to get committed implicitly.
| |||||||||||
Do we need to qualify index names with the schema name?
| |||||||||||
Registers an OUT parameter which will be returning a
ResultSet . | |||||||||||
Does this dialect support a way to retrieve the database's current
timestamp value?
| |||||||||||
Does this dialect support empty IN lists?
For example, is [where XYZ in ()] a supported construct?
| |||||||||||
Does this dialect support identity column key generation?
| |||||||||||
Does this dialect support some form of limiting query results
via a SQL clause?
| |||||||||||
Does the dialect support propagating changes to LOB
values back to the database? Talking about mutating the
internal value of the locator as opposed to supplying a new
locator instance...
| |||||||||||
Is this dialect known to support what ANSI-SQL terms "row value
constructor" syntax; sometimes called tuple syntax.
| |||||||||||
Does this dialect support referencing the table being mutated in
a subquery.
| |||||||||||
Does this dialect support temporary tables?
|
Protected Methods | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
[Expand]
Inherited Methods | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
From class
org.hibernate.dialect.Dialect
| |||||||||||
From class
java.lang.Object
|
Are string comparisons implicitly case insensitive.
In other words, does [where 'XYZ' = 'xyz'] resolve to true?The character specific to this dialect used to close a quoted identifier.
The syntax used to add a column to a table (optional).
The syntax used to add a foreign key constraint to a table.
constraintName | The FK constraint name. |
---|---|
foreignKey | The names of the columns comprising the FK |
referencedTable | The table referenced by the FK |
primaryKey | The explicit columns in the referencedTable referenced by this FK. |
referencesPrimaryKey | if false, constraint should be explicit about which column names the constraint refers to |
Get the name of the database type appropriate for casting operations (via the CAST() SQL function) for the given java.sql.Types typecode.
code | The java.sql.Types typecode |
---|
Command used to create a temporary table.
Retrieve the command used to retrieve the current timestamp from the database.
Command used to drop a temporary table.
Get the string to append to SELECT statements to acquire locks for this dialect.
The syntax used during DDL to define a column as being an IDENTITY.
Get the select command to use to retrieve the last generated IDENTITY value.
Apply s limit clause to the query.
Typically dialects utilizevariable
limit clauses when they support limits. Thus, when building the
select command we do not actually need to know the limit or the offest
since we will just be using placeholders.
Here we do still pass along whether or not an offset was specified
so that dialects not supporting offsets can generate proper exceptions.
In general, dialects will override one or the other of this method and
getLimitString(String, int, int)
.sql | The query to which to apply the limit. |
---|---|
hasOffset | Is the query requesting an offset? |
Get the string to append to SELECT statements to acquire WRITE locks for this dialect. Location of the of the returned string is treated the same as getForUpdateString.
timeout | in milliseconds, -1 for indefinite wait and 0 for no wait. |
---|
Given a callable statement previously processed by registerResultSetOutParameter(CallableStatement, int)
,
extract the ResultSet
from the OUT parameter.
ps | The callable statement. |
---|
SQLException |
---|
Get the command used to select a GUID from the underlying database.
Optional operation.Get the string to append to SELECT statements to acquire WRITE locks for this dialect. Location of the of the returned string is treated the same as getForUpdateString.
timeout | in milliseconds, -1 for indefinite wait and 0 for no wait. |
---|
Should the value returned by getCurrentTimestampSelectString()
be treated as callable. Typically this indicates that JDBC escape
syntax is being used...
getCurrentTimestampSelectString()
return
is callable; false otherwise.
The character specific to this dialect used to begin a quoted identifier.
Does the dialect require that temporary table DDL statements occur in isolation from other statements? This would be the case if the creation would cause any current transaction to get committed implicitly.
JDBC defines a standard way to query for this information via thedataDefinitionCausesTransactionCommit()
method. However, that does not distinguish between temporary table
DDL and other forms of DDL; MySQL, for example, reports DDL causing a
transaction commit via its driver, even though that is not the case for
temporary table DDL.
Possible return values and their meanings:TRUE
- Unequivocally, perform the temporary table DDL
in isolation.FALSE
- Unequivocally, do not perform the
temporary table DDL in isolation.dataDefinitionCausesTransactionCommit()
Do we need to qualify index names with the schema name?
Registers an OUT parameter which will be returning a
ResultSet
. How this is accomplished varies greatly
from DB to DB, hence its inclusion (along with getResultSet(CallableStatement)
) here.
statement | The callable statement. |
---|---|
col | The bind position at which to register the OUT param. |
SQLException |
---|
Does this dialect support a way to retrieve the database's current timestamp value?
Does this dialect support empty IN lists?
For example, is [where XYZ in ()] a supported construct?Does this dialect support identity column key generation?
Does this dialect support some form of limiting query results via a SQL clause?
Does the dialect support propagating changes to LOB values back to the database? Talking about mutating the internal value of the locator as opposed to supplying a new locator instance...
For BLOBs, the internal value might be changed by:setBinaryStream(long)
,
setBytes(long, byte[])
,
setBytes(long, byte[], int, int)
,
or truncate(long)
.
For CLOBs, the internal value might be changed by:
setAsciiStream(long)
,
setCharacterStream(long)
,
setString(long, String)
,
setString(long, String, int, int)
,
or truncate(long)
.
NOTE : I do not know the correct answer currently for
databases which (1) are not part of the cruise control process
or (2) do not supportsExpectedLobUsagePattern()
.Is this dialect known to support what ANSI-SQL terms "row value constructor" syntax; sometimes called tuple syntax.
Basically, does it support syntax like "... where (FIRST_NAME, LAST_NAME) = ('Steve', 'Ebersole') ...".Does this dialect support referencing the table being mutated in a subquery. The "table being mutated" is the table referenced in an UPDATE or a DELETE query. And so can that table then be referenced in a subquery of said UPDATE/DELETE query.
For example, would the following two syntaxes be supported:Does this dialect support temporary tables?