public Class Cache71Dialect

Overrides org.hibernate.dialect.Dialect.areStringComparisonsCaseInsensitive.

Doc from org.hibernate.dialect.Dialect.areStringComparisonsCaseInsensitive.

Are string comparisons implicitly case insensitive.

In other words, does [where 'XYZ' = 'xyz'] resolve to true?

Returns:boolean

True if comparisons are case insensitive.

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.bindLimitParametersFirst.

Doc from org.hibernate.dialect.Dialect.bindLimitParametersFirst.

Does the LIMIT clause come at the start of the SELECT statement, rather than at the end?

Returns:boolean

true if limit parameters should come before other parameters

Annotations

@Override

@SuppressWarnings:deprecation

Overrides org.hibernate.dialect.Dialect.buildSQLExceptionConversionDelegate.

Doc from org.hibernate.dialect.Dialect.buildSQLExceptionConversionDelegate.

Build an instance of a SQLExceptionConversionDelegate for interpreting dialect-specific error or SQLState codes.

When buildSQLExceptionConverter returns null, the default SQLExceptionConverter is used to interpret SQLState and error codes. If this method is overridden to return a non-null value, the default SQLExceptionConverter will use the returned SQLExceptionConversionDelegate in addition to the following standard delegates:

1. a "static" delegate based on the JDBC 4 defined SQLException hierarchy;
2. a delegate that interprets SQLState codes for either X/Open or SQL-2003 codes, depending on java.sql.DatabaseMetaData#getSQLStateType

It is strongly recommended that specific Dialect implementations override this method, since interpretation of a SQL error is much more accurate when based on the vendor-specific ErrorCode rather than the SQLState.

Specific Dialects may override to return whatever is most appropriate for that vendor.

Returns:SQLExceptionConversionDelegate

The SQLExceptionConversionDelegate for this dialect

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.createOuterJoinFragment.

Doc from org.hibernate.dialect.Dialect.createOuterJoinFragment.

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

Returns:JoinFragment

This dialect's JoinFragment strategy.

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.dropConstraints.

Doc from org.hibernate.dialect.Dialect.dropConstraints.

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

Returns:boolean

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

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.getAddColumnString.

Doc from org.hibernate.dialect.Dialect.getAddColumnString.

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

Returns:String

The "add column" fragment.

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.getAddForeignKeyConstraintString.

Doc from org.hibernate.dialect.Dialect.getAddForeignKeyConstraintString.

The syntax used to add a foreign key constraint to a table.

Parameters

constraintName:String

The FK constraint name.

foreignKey:String[]

The names of the columns comprising the FK

referencedTable:String

The table referenced by the FK

primaryKey:String[]

The explicit columns in the referencedTable referenced by this FK.

referencesPrimaryKey:boolean

if false, constraint should be explicit about which column names the constraint refers to

Returns:String

the "add FK" fragment

Annotations

@Override

@SuppressWarnings:StringBufferReplaceableByString

Overrides org.hibernate.dialect.Dialect.getCascadeConstraintsString.

Doc from org.hibernate.dialect.Dialect.getCascadeConstraintsString.

Completely optional cascading drop clause

Returns:String

String

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.getDefaultMultiTableBulkIdStrategy.

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.getIdentityColumnSupport.

Doc from org.hibernate.dialect.Dialect.getIdentityColumnSupport.

Get the appropriate IdentityColumnSupport

Returns:IdentityColumnSupport

the IdentityColumnSupport

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.getLimitHandler.

Doc from org.hibernate.dialect.Dialect.getLimitHandler.

Returns the delegate managing LIMIT clause.

Returns:LimitHandler

LIMIT clause delegate.

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.getLimitString.

Doc from org.hibernate.dialect.Dialect.getLimitString.

Apply a limit clause to the query.

Typically dialects utilize variable limit clauses when they support limits. Thus, when building the select command we do not actually need to know the limit or the offset 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).

Parameters

sql:String

The query to which to apply the limit.

hasOffset:boolean

Is the query requesting an offset?

Returns:String

the modified SQL

Annotations

@Override

@SuppressWarnings:deprecation

Overrides org.hibernate.dialect.Dialect.getLockingStrategy.

Doc from org.hibernate.dialect.Dialect.getLockingStrategy.

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

Parameters

lockable:Lockable

The persister for the entity to be locked.

lockMode:LockMode

The type of lock to be acquired.

Returns:LockingStrategy

The appropriate locking strategy.

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.getLowercaseFunction.

Doc from org.hibernate.dialect.Dialect.getLowercaseFunction.

The name of the SQL function that transforms a string to lowercase

Returns:String

The dialect-specific lowercase function.

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.getNativeIdentifierGeneratorStrategy.

Doc from org.hibernate.dialect.Dialect.getNativeIdentifierGeneratorStrategy.

Resolves the native generation strategy associated to this dialect.

Comes into play whenever the user specifies the native generator.

Returns:String

The native generator strategy.

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.getNoColumnsInsertString.

Doc from org.hibernate.dialect.Dialect.getNoColumnsInsertString.

The fragment used to insert a row without specifying any column values. This is not possible on some databases.

Returns:String

The appropriate empty values clause.

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.getNullColumnString.

Doc from org.hibernate.dialect.Dialect.getNullColumnString.

The keyword used to specify a nullable column.

Returns:String

String

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.getResultSet.

Doc from org.hibernate.dialect.Dialect.getResultSet.

Given a callable statement previously processed by registerResultSetOutParameter, extract the ResultSet from the OUT parameter.

Parameters

ps:CallableStatement

The callable statement.

Returns:ResultSet

The extracted result set.

Annotations

@Override

Exceptions

SQLException:

Indicates problems extracting the result set.

Overrides org.hibernate.dialect.Dialect.getViolatedConstraintNameExtracter.

Implements org.hibernate.exception.spi.ConversionContext.getViolatedConstraintNameExtracter.

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.hasAlterTable.

Doc from org.hibernate.dialect.Dialect.hasAlterTable.

Does this dialect support the ALTER TABLE syntax?

Returns:boolean

True if we support altering of tables; false otherwise.

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.hasSelfReferentialForeignKeyBug.

Doc from org.hibernate.dialect.Dialect.hasSelfReferentialForeignKeyBug.

Does the database/driver have bug in deleting rows that refer to other rows being deleted in the same query?

Returns:boolean

true if the database/driver has this bug

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.qualifyIndexName.

Doc from org.hibernate.dialect.Dialect.qualifyIndexName.

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

Returns:boolean

boolean

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.registerResultSetOutParameter.

Doc from org.hibernate.dialect.Dialect.registerResultSetOutParameter.

Registers a parameter (either OUT, or the new REF_CURSOR param type available in Java 8) capable of returning ResultSet *by position*. Pre-Java 8, registering such ResultSet-returning parameters varied greatly across database and drivers; hence its inclusion as part of the Dialect contract.

Parameters

statement:CallableStatement

The callable statement.

col:int

The bind position at which to register the output param.

Returns:int

The number of (contiguous) bind positions used.

Annotations

@Override

Exceptions

SQLException:

Indicates problems registering the param.

Overrides org.hibernate.dialect.Dialect.supportsCascadeDelete.

Doc from org.hibernate.dialect.Dialect.supportsCascadeDelete.

Does this dialect support cascaded delete on foreign key definitions?

Returns:boolean

true indicates that the dialect does support cascaded delete on foreign keys.

Annotations

@Override

Does this dialect support check constraints?

Returns:boolean

false (Cache does not support check constraints)

Annotations

@SuppressWarnings:UnusedDeclaration

Overrides org.hibernate.dialect.Dialect.supportsEmptyInList.

Doc from org.hibernate.dialect.Dialect.supportsEmptyInList.

Does this dialect support empty IN lists?

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

Returns:boolean

True if empty in lists are supported; false otherwise.

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.supportsLimit.

Doc from org.hibernate.dialect.Dialect.supportsLimit.

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

Returns:boolean

True if this dialect supports some form of LIMIT.

Annotations

@Override

@SuppressWarnings:deprecation

Overrides org.hibernate.dialect.Dialect.supportsLimitOffset.

Doc from org.hibernate.dialect.Dialect.supportsLimitOffset.

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

Returns:boolean

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

Annotations

@Override

@SuppressWarnings:deprecation

Overrides org.hibernate.dialect.Dialect.supportsOuterJoinForUpdate.

Doc from org.hibernate.dialect.Dialect.supportsOuterJoinForUpdate.

Does this dialect support FOR UPDATE in conjunction with outer joined rows?

Returns:boolean

True if outer joined rows can be locked via FOR UPDATE.

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.supportsResultSetPositionQueryMethodsOnForwardOnlyCursor.

Doc from org.hibernate.dialect.Dialect.supportsResultSetPositionQueryMethodsOnForwardOnlyCursor.

Does this dialect support asking the result set its positioning information on forward only cursors. Specifically, in the case of scrolling fetches, Hibernate needs to use ResultSet#isAfterLast and ResultSet#isBeforeFirst. Certain drivers do not allow access to these methods for forward only cursors.

NOTE : this is highly driver dependent!

Returns:boolean

True if methods like ResultSet#isAfterLast and ResultSet#isBeforeFirst are supported for forward only cursors; false otherwise.

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.supportsSequences.

Doc from org.hibernate.dialect.Dialect.supportsSequences.

Does this dialect support sequences?

Returns:boolean

True if sequences supported; false otherwise.

Annotations

@Override

Overrides org.hibernate.dialect.Dialect.supportsVariableLimit.

Doc from org.hibernate.dialect.Dialect.supportsVariableLimit.

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

Returns:boolean

True if bind variables can be used; false otherwise.

Annotations

@Override

@SuppressWarnings:deprecation

Overrides org.hibernate.dialect.Dialect.useMaxForLimit.

Doc from org.hibernate.dialect.Dialect.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:boolean

True if limit is relative from offset; false otherwise.

Annotations

@Override

@SuppressWarnings:deprecation