org.hibernate.dialect.Cache71Dialect Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.dialect;
import java.sql.CallableStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import org.hibernate.LockMode;
import org.hibernate.MappingException;
import org.hibernate.cfg.Environment;
import org.hibernate.dialect.function.ConditionalParenthesisFunction;
import org.hibernate.dialect.function.ConvertFunction;
import org.hibernate.dialect.function.NoArgSQLFunction;
import org.hibernate.dialect.function.NvlFunction;
import org.hibernate.dialect.function.SQLFunctionTemplate;
import org.hibernate.dialect.function.StandardJDBCEscapeFunction;
import org.hibernate.dialect.function.StandardSQLFunction;
import org.hibernate.dialect.function.VarArgsSQLFunction;
import org.hibernate.dialect.lock.LockingStrategy;
import org.hibernate.dialect.lock.OptimisticForceIncrementLockingStrategy;
import org.hibernate.dialect.lock.OptimisticLockingStrategy;
import org.hibernate.dialect.lock.PessimisticForceIncrementLockingStrategy;
import org.hibernate.dialect.lock.PessimisticReadUpdateLockingStrategy;
import org.hibernate.dialect.lock.PessimisticWriteUpdateLockingStrategy;
import org.hibernate.dialect.lock.SelectLockingStrategy;
import org.hibernate.dialect.lock.UpdateLockingStrategy;
import org.hibernate.exception.internal.CacheSQLExceptionConversionDelegate;
import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
import org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtracter;
import org.hibernate.exception.spi.ViolatedConstraintNameExtracter;
import org.hibernate.id.IdentityGenerator;
import org.hibernate.internal.util.StringHelper;
import org.hibernate.persister.entity.Lockable;
import org.hibernate.sql.CacheJoinFragment;
import org.hibernate.sql.JoinFragment;
import org.hibernate.type.StandardBasicTypes;
/**
* Caché 2007.1 dialect. This class is required in order to use Hibernate with Intersystems Caché SQL.
*
* Compatible with Caché 2007.1.
*
*
* Caché and Hibernate
*
*
* Caché and Hibernate
* PREREQUISITES
* These setup instructions assume that both Caché and Hibernate are installed and operational.
*
* HIBERNATE DIRECTORIES AND FILES
* JBoss distributes the InterSystems Cache' dialect for Hibernate 3.2.1
* For earlier versions of Hibernate please contact
* InterSystems Worldwide Response Center (WRC)
* for the appropriate source files.
*
* CACHÉ DOCUMENTATION
* Documentation for Caché is available online when Caché is running.
* It can also be obtained from the
* InterSystems website.
* The book, "Object-oriented Application Development Using the Caché Post-relational Database:
* is also available from Springer-Verlag.
*
* HIBERNATE DOCUMENTATION
* Hibernate comes with extensive electronic documentation.
* In addition, several books on Hibernate are available from
* Manning Publications Co.
* Three available titles are "Hibernate Quickly", "Hibernate in Action", and "Java Persistence with Hibernate".
*
* TO SET UP HIBERNATE FOR USE WITH CACHÉ
* The following steps assume that the directory where Caché was installed is C:\CacheSys.
* This is the default installation directory for Caché.
* The default installation directory for Hibernate is assumed to be C:\Hibernate.
*
* If either product is installed in a different location, the pathnames that follow should be modified appropriately.
*
* Caché version 2007.1 and above is recommended for use with
* Hibernate. The next step depends on the location of your
* CacheDB.jar depending on your version of Caché.
*
* - Copy C:\CacheSys\dev\java\lib\JDK15\CacheDB.jar to C:\Hibernate\lib\CacheDB.jar.
*
* - Insert the following files into your Java classpath:
*
*
* - All jar files in the directory C:\Hibernate\lib
* - The directory (or directories) where hibernate.properties and/or hibernate.cfg.xml are kept.
*
*
*
* - In the file, hibernate.properties (or hibernate.cfg.xml),
* specify the Caché dialect and the Caché version URL settings.
*
*
* For example, in Hibernate 3.2, typical entries in hibernate.properties would have the following
* "name=value" pairs:
*
*
*
* Property Name
* Property Value
*
*
* hibernate.dialect
* org.hibernate.dialect.Cache71Dialect
*
*
* hibernate.connection.driver_class
* com.intersys.jdbc.CacheDriver
*
*
* hibernate.connection.username
* (see note 1)
*
*
* hibernate.connection.password
* (see note 1)
*
*
* hibernate.connection.url
* jdbc:Cache://127.0.0.1:1972/USER
*
*
*
*
* - Note 1
* - Please contact your administrator for the userid and password you should use when attempting access via JDBC.
* By default, these are chosen to be "_SYSTEM" and "SYS" respectively as noted in the SQL standard.
*
*
* CACHÉ VERSION URL
* This is the standard URL for the JDBC driver.
* For a JDBC driver on the machine hosting Caché, use the IP "loopback" address, 127.0.0.1.
* For 1972, the default port, specify the super server port of your Caché instance.
* For USER, substitute the NAMESPACE which contains your Caché database data.
*
* CACHÉ DIALECTS
* Choices for Dialect are:
*
*
*
* - org.hibernate.dialect.Cache71Dialect (requires Caché
* 2007.1 or above)
*
*
*
* SUPPORT FOR IDENTITY COLUMNS
* Caché 2007.1 or later supports identity columns. For
* Hibernate to use identity columns, specify "native" as the
* generator.
*
* SEQUENCE DIALECTS SUPPORT SEQUENCES
*
* To use Hibernate sequence support with Caché in a namespace, you must FIRST load the following file into that namespace:
*
* etc\CacheSequences.xml
*
* For example, at the COS terminal prompt in the namespace, run the
* following command:
*
* d LoadFile^%apiOBJ("c:\hibernate\etc\CacheSequences.xml","ck")
*
* In your Hibernate mapping you can specify sequence use.
*
* For example, the following shows the use of a sequence generator in a Hibernate mapping:
*
* <id name="id" column="uid" type="long" unsaved-value="null">
* <generator class="sequence"/>
* </id>
*
*
*
* Some versions of Hibernate under some circumstances call
* getSelectSequenceNextValString() in the dialect. If this happens
* you will receive the error message: new MappingException( "Dialect
* does not support sequences" ).
*
* HIBERNATE FILES ASSOCIATED WITH CACHÉ DIALECT
* The following files are associated with Caché dialect:
*
*
* - src\org\hibernate\dialect\Cache71Dialect.java
* - src\org\hibernate\dialect\function\ConditionalParenthesisFunction.java
* - src\org\hibernate\dialect\function\ConvertFunction.java
* - src\org\hibernate\exception\CacheSQLStateConverter.java
* - src\org\hibernate\sql\CacheJoinFragment.java
*
* Cache71Dialect ships with Hibernate 3.2. All other dialects are distributed by InterSystems and subclass Cache71Dialect.
*
* @author Jonathan Levinson
*/
public class Cache71Dialect extends Dialect {
/**
* Creates new Cache71Dialect instance. Sets up the JDBC /
* Caché type mappings.
*/
public Cache71Dialect() {
super();
commonRegistration();
register71Functions();
}
protected final void commonRegistration() {
// Note: For object <-> SQL datatype mappings see:
// Configuration Manager | Advanced | SQL | System DDL Datatype Mappings
//
// TBD registerColumnType(Types.BINARY, "binary($1)");
// changed 08-11-2005, jsl
registerColumnType( Types.BINARY, "varbinary($1)" );
registerColumnType( Types.BIGINT, "BigInt" );
registerColumnType( Types.BIT, "bit" );
registerColumnType( Types.CHAR, "char(1)" );
registerColumnType( Types.DATE, "date" );
registerColumnType( Types.DECIMAL, "decimal" );
registerColumnType( Types.DOUBLE, "double" );
registerColumnType( Types.FLOAT, "float" );
registerColumnType( Types.INTEGER, "integer" );
registerColumnType( Types.LONGVARBINARY, "longvarbinary" ); // binary %Stream
registerColumnType( Types.LONGVARCHAR, "longvarchar" ); // character %Stream
registerColumnType( Types.NUMERIC, "numeric($p,$s)" );
registerColumnType( Types.REAL, "real" );
registerColumnType( Types.SMALLINT, "smallint" );
registerColumnType( Types.TIMESTAMP, "timestamp" );
registerColumnType( Types.TIME, "time" );
registerColumnType( Types.TINYINT, "tinyint" );
// TBD should this be varbinary($1)?
// registerColumnType(Types.VARBINARY, "binary($1)");
registerColumnType( Types.VARBINARY, "longvarbinary" );
registerColumnType( Types.VARCHAR, "varchar($l)" );
registerColumnType( Types.BLOB, "longvarbinary" );
registerColumnType( Types.CLOB, "longvarchar" );
getDefaultProperties().setProperty( Environment.USE_STREAMS_FOR_BINARY, "false" );
getDefaultProperties().setProperty( Environment.STATEMENT_BATCH_SIZE, DEFAULT_BATCH_SIZE );
//getDefaultProperties().setProperty(Environment.STATEMENT_BATCH_SIZE, NO_BATCH);
getDefaultProperties().setProperty( Environment.USE_SQL_COMMENTS, "false" );
registerFunction( "abs", new StandardSQLFunction( "abs" ) );
registerFunction( "acos", new StandardJDBCEscapeFunction( "acos", StandardBasicTypes.DOUBLE ) );
registerFunction( "%alphaup", new StandardSQLFunction( "%alphaup", StandardBasicTypes.STRING ) );
registerFunction( "ascii", new StandardSQLFunction( "ascii", StandardBasicTypes.STRING ) );
registerFunction( "asin", new StandardJDBCEscapeFunction( "asin", StandardBasicTypes.DOUBLE ) );
registerFunction( "atan", new StandardJDBCEscapeFunction( "atan", StandardBasicTypes.DOUBLE ) );
registerFunction( "bit_length", new SQLFunctionTemplate( StandardBasicTypes.INTEGER, "($length(?1)*8)" ) );
// hibernate impelemnts cast in Dialect.java
registerFunction( "ceiling", new StandardSQLFunction( "ceiling", StandardBasicTypes.INTEGER ) );
registerFunction( "char", new StandardJDBCEscapeFunction( "char", StandardBasicTypes.CHARACTER ) );
registerFunction( "character_length", new StandardSQLFunction( "character_length", StandardBasicTypes.INTEGER ) );
registerFunction( "char_length", new StandardSQLFunction( "char_length", StandardBasicTypes.INTEGER ) );
registerFunction( "cos", new StandardJDBCEscapeFunction( "cos", StandardBasicTypes.DOUBLE ) );
registerFunction( "cot", new StandardJDBCEscapeFunction( "cot", StandardBasicTypes.DOUBLE ) );
registerFunction( "coalesce", new VarArgsSQLFunction( "coalesce(", ",", ")" ) );
registerFunction( "concat", new VarArgsSQLFunction( StandardBasicTypes.STRING, "", "||", "" ) );
registerFunction( "convert", new ConvertFunction() );
registerFunction( "curdate", new StandardJDBCEscapeFunction( "curdate", StandardBasicTypes.DATE ) );
registerFunction( "current_date", new NoArgSQLFunction( "current_date", StandardBasicTypes.DATE, false ) );
registerFunction( "current_time", new NoArgSQLFunction( "current_time", StandardBasicTypes.TIME, false ) );
registerFunction(
"current_timestamp", new ConditionalParenthesisFunction( "current_timestamp", StandardBasicTypes.TIMESTAMP )
);
registerFunction( "curtime", new StandardJDBCEscapeFunction( "curtime", StandardBasicTypes.TIME ) );
registerFunction( "database", new StandardJDBCEscapeFunction( "database", StandardBasicTypes.STRING ) );
registerFunction( "dateadd", new VarArgsSQLFunction( StandardBasicTypes.TIMESTAMP, "dateadd(", ",", ")" ) );
registerFunction( "datediff", new VarArgsSQLFunction( StandardBasicTypes.INTEGER, "datediff(", ",", ")" ) );
registerFunction( "datename", new VarArgsSQLFunction( StandardBasicTypes.STRING, "datename(", ",", ")" ) );
registerFunction( "datepart", new VarArgsSQLFunction( StandardBasicTypes.INTEGER, "datepart(", ",", ")" ) );
registerFunction( "day", new StandardSQLFunction( "day", StandardBasicTypes.INTEGER ) );
registerFunction( "dayname", new StandardJDBCEscapeFunction( "dayname", StandardBasicTypes.STRING ) );
registerFunction( "dayofmonth", new StandardJDBCEscapeFunction( "dayofmonth", StandardBasicTypes.INTEGER ) );
registerFunction( "dayofweek", new StandardJDBCEscapeFunction( "dayofweek", StandardBasicTypes.INTEGER ) );
registerFunction( "dayofyear", new StandardJDBCEscapeFunction( "dayofyear", StandardBasicTypes.INTEGER ) );
// is it necessary to register %exact since it can only appear in a where clause?
registerFunction( "%exact", new StandardSQLFunction( "%exact", StandardBasicTypes.STRING ) );
registerFunction( "exp", new StandardJDBCEscapeFunction( "exp", StandardBasicTypes.DOUBLE ) );
registerFunction( "%external", new StandardSQLFunction( "%external", StandardBasicTypes.STRING ) );
registerFunction( "$extract", new VarArgsSQLFunction( StandardBasicTypes.INTEGER, "$extract(", ",", ")" ) );
registerFunction( "$find", new VarArgsSQLFunction( StandardBasicTypes.INTEGER, "$find(", ",", ")" ) );
registerFunction( "floor", new StandardSQLFunction( "floor", StandardBasicTypes.INTEGER ) );
registerFunction( "getdate", new StandardSQLFunction( "getdate", StandardBasicTypes.TIMESTAMP ) );
registerFunction( "hour", new StandardJDBCEscapeFunction( "hour", StandardBasicTypes.INTEGER ) );
registerFunction( "ifnull", new VarArgsSQLFunction( "ifnull(", ",", ")" ) );
registerFunction( "%internal", new StandardSQLFunction( "%internal" ) );
registerFunction( "isnull", new VarArgsSQLFunction( "isnull(", ",", ")" ) );
registerFunction( "isnumeric", new StandardSQLFunction( "isnumeric", StandardBasicTypes.INTEGER ) );
registerFunction( "lcase", new StandardJDBCEscapeFunction( "lcase", StandardBasicTypes.STRING ) );
registerFunction( "left", new StandardJDBCEscapeFunction( "left", StandardBasicTypes.STRING ) );
registerFunction( "len", new StandardSQLFunction( "len", StandardBasicTypes.INTEGER ) );
registerFunction( "$length", new VarArgsSQLFunction( "$length(", ",", ")" ) );
// aggregate functions shouldn't be registered, right?
//registerFunction( "list", new StandardSQLFunction("list",StandardBasicTypes.STRING) );
// stopped on $list
registerFunction( "$list", new VarArgsSQLFunction( "$list(", ",", ")" ) );
registerFunction( "$listdata", new VarArgsSQLFunction( "$listdata(", ",", ")" ) );
registerFunction( "$listfind", new VarArgsSQLFunction( "$listfind(", ",", ")" ) );
registerFunction( "$listget", new VarArgsSQLFunction( "$listget(", ",", ")" ) );
registerFunction( "$listlength", new StandardSQLFunction( "$listlength", StandardBasicTypes.INTEGER ) );
registerFunction( "locate", new StandardSQLFunction( "$FIND", StandardBasicTypes.INTEGER ) );
registerFunction( "log", new StandardJDBCEscapeFunction( "log", StandardBasicTypes.DOUBLE ) );
registerFunction( "log10", new StandardJDBCEscapeFunction( "log", StandardBasicTypes.DOUBLE ) );
registerFunction( "lower", new StandardSQLFunction( "lower" ) );
registerFunction( "ltrim", new StandardSQLFunction( "ltrim" ) );
registerFunction( "minute", new StandardJDBCEscapeFunction( "minute", StandardBasicTypes.INTEGER ) );
registerFunction( "mod", new StandardJDBCEscapeFunction( "mod", StandardBasicTypes.DOUBLE ) );
registerFunction( "month", new StandardJDBCEscapeFunction( "month", StandardBasicTypes.INTEGER ) );
registerFunction( "monthname", new StandardJDBCEscapeFunction( "monthname", StandardBasicTypes.STRING ) );
registerFunction( "now", new StandardJDBCEscapeFunction( "monthname", StandardBasicTypes.TIMESTAMP ) );
registerFunction( "nullif", new VarArgsSQLFunction( "nullif(", ",", ")" ) );
registerFunction( "nvl", new NvlFunction() );
registerFunction( "%odbcin", new StandardSQLFunction( "%odbcin" ) );
registerFunction( "%odbcout", new StandardSQLFunction( "%odbcin" ) );
registerFunction( "%pattern", new VarArgsSQLFunction( StandardBasicTypes.STRING, "", "%pattern", "" ) );
registerFunction( "pi", new StandardJDBCEscapeFunction( "pi", StandardBasicTypes.DOUBLE ) );
registerFunction( "$piece", new VarArgsSQLFunction( StandardBasicTypes.STRING, "$piece(", ",", ")" ) );
registerFunction( "position", new VarArgsSQLFunction( StandardBasicTypes.INTEGER, "position(", " in ", ")" ) );
registerFunction( "power", new VarArgsSQLFunction( StandardBasicTypes.STRING, "power(", ",", ")" ) );
registerFunction( "quarter", new StandardJDBCEscapeFunction( "quarter", StandardBasicTypes.INTEGER ) );
registerFunction( "repeat", new VarArgsSQLFunction( StandardBasicTypes.STRING, "repeat(", ",", ")" ) );
registerFunction( "replicate", new VarArgsSQLFunction( StandardBasicTypes.STRING, "replicate(", ",", ")" ) );
registerFunction( "right", new StandardJDBCEscapeFunction( "right", StandardBasicTypes.STRING ) );
registerFunction( "round", new VarArgsSQLFunction( StandardBasicTypes.FLOAT, "round(", ",", ")" ) );
registerFunction( "rtrim", new StandardSQLFunction( "rtrim", StandardBasicTypes.STRING ) );
registerFunction( "second", new StandardJDBCEscapeFunction( "second", StandardBasicTypes.INTEGER ) );
registerFunction( "sign", new StandardSQLFunction( "sign", StandardBasicTypes.INTEGER ) );
registerFunction( "sin", new StandardJDBCEscapeFunction( "sin", StandardBasicTypes.DOUBLE ) );
registerFunction( "space", new StandardSQLFunction( "space", StandardBasicTypes.STRING ) );
registerFunction( "%sqlstring", new VarArgsSQLFunction( StandardBasicTypes.STRING, "%sqlstring(", ",", ")" ) );
registerFunction( "%sqlupper", new VarArgsSQLFunction( StandardBasicTypes.STRING, "%sqlupper(", ",", ")" ) );
registerFunction( "sqrt", new StandardJDBCEscapeFunction( "SQRT", StandardBasicTypes.DOUBLE ) );
registerFunction( "%startswith", new VarArgsSQLFunction( StandardBasicTypes.STRING, "", "%startswith", "" ) );
// below is for Cache' that don't have str in 2007.1 there is str and we register str directly
registerFunction( "str", new SQLFunctionTemplate( StandardBasicTypes.STRING, "cast(?1 as char varying)" ) );
registerFunction( "string", new VarArgsSQLFunction( StandardBasicTypes.STRING, "string(", ",", ")" ) );
// note that %string is deprecated
registerFunction( "%string", new VarArgsSQLFunction( StandardBasicTypes.STRING, "%string(", ",", ")" ) );
registerFunction( "substr", new VarArgsSQLFunction( StandardBasicTypes.STRING, "substr(", ",", ")" ) );
registerFunction( "substring", new VarArgsSQLFunction( StandardBasicTypes.STRING, "substring(", ",", ")" ) );
registerFunction( "sysdate", new NoArgSQLFunction( "sysdate", StandardBasicTypes.TIMESTAMP, false ) );
registerFunction( "tan", new StandardJDBCEscapeFunction( "tan", StandardBasicTypes.DOUBLE ) );
registerFunction( "timestampadd", new StandardJDBCEscapeFunction( "timestampadd", StandardBasicTypes.DOUBLE ) );
registerFunction( "timestampdiff", new StandardJDBCEscapeFunction( "timestampdiff", StandardBasicTypes.DOUBLE ) );
registerFunction( "tochar", new VarArgsSQLFunction( StandardBasicTypes.STRING, "tochar(", ",", ")" ) );
registerFunction( "to_char", new VarArgsSQLFunction( StandardBasicTypes.STRING, "to_char(", ",", ")" ) );
registerFunction( "todate", new VarArgsSQLFunction( StandardBasicTypes.STRING, "todate(", ",", ")" ) );
registerFunction( "to_date", new VarArgsSQLFunction( StandardBasicTypes.STRING, "todate(", ",", ")" ) );
registerFunction( "tonumber", new StandardSQLFunction( "tonumber" ) );
registerFunction( "to_number", new StandardSQLFunction( "tonumber" ) );
// TRIM(end_keyword string-expression-1 FROM string-expression-2)
// use Hibernate implementation "From" is one of the parameters they pass in position ?3
//registerFunction( "trim", new SQLFunctionTemplate(StandardBasicTypes.STRING, "trim(?1 ?2 from ?3)") );
registerFunction( "truncate", new StandardJDBCEscapeFunction( "truncate", StandardBasicTypes.STRING ) );
registerFunction( "ucase", new StandardJDBCEscapeFunction( "ucase", StandardBasicTypes.STRING ) );
registerFunction( "upper", new StandardSQLFunction( "upper" ) );
// %upper is deprecated
registerFunction( "%upper", new StandardSQLFunction( "%upper" ) );
registerFunction( "user", new StandardJDBCEscapeFunction( "user", StandardBasicTypes.STRING ) );
registerFunction( "week", new StandardJDBCEscapeFunction( "user", StandardBasicTypes.INTEGER ) );
registerFunction( "xmlconcat", new VarArgsSQLFunction( StandardBasicTypes.STRING, "xmlconcat(", ",", ")" ) );
registerFunction( "xmlelement", new VarArgsSQLFunction( StandardBasicTypes.STRING, "xmlelement(", ",", ")" ) );
// xmlforest requires a new kind of function constructor
registerFunction( "year", new StandardJDBCEscapeFunction( "year", StandardBasicTypes.INTEGER ) );
}
protected final void register71Functions() {
this.registerFunction( "str", new VarArgsSQLFunction( StandardBasicTypes.STRING, "str(", ",", ")" ) );
}
// DDL support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public boolean hasAlterTable() {
// Does this dialect support the ALTER TABLE syntax?
return true;
}
public boolean qualifyIndexName() {
// Do we need to qualify index names with the schema name?
return false;
}
/**
* The syntax used to add a foreign key constraint to a table.
*
* @return String
*/
public String getAddForeignKeyConstraintString(
String constraintName,
String[] foreignKey,
String referencedTable,
String[] primaryKey,
boolean referencesPrimaryKey) {
// The syntax used to add a foreign key constraint to a table.
return new StringBuilder( 300 )
.append( " ADD CONSTRAINT " )
.append( constraintName )
.append( " FOREIGN KEY " )
.append( constraintName )
.append( " (" )
.append( StringHelper.join( ", ", foreignKey ) ) // identifier-commalist
.append( ") REFERENCES " )
.append( referencedTable )
.append( " (" )
.append( StringHelper.join( ", ", primaryKey ) ) // identifier-commalist
.append( ") " )
.toString();
}
public boolean supportsCheck() {
// Does this dialect support check constraints?
return false;
}
public String getAddColumnString() {
// The syntax used to add a column to a table
return " add column";
}
public String getCascadeConstraintsString() {
// Completely optional cascading drop clause.
return "";
}
public boolean dropConstraints() {
// Do we need to drop constraints before dropping tables in this dialect?
return true;
}
public boolean supportsCascadeDelete() {
return true;
}
public boolean hasSelfReferentialForeignKeyBug() {
return true;
}
// temporary table support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public boolean supportsTemporaryTables() {
return true;
}
public String generateTemporaryTableName(String baseTableName) {
String name = super.generateTemporaryTableName( baseTableName );
return name.length() > 25 ? name.substring( 1, 25 ) : name;
}
public String getCreateTemporaryTableString() {
return "create global temporary table";
}
public Boolean performTemporaryTableDDLInIsolation() {
return Boolean.FALSE;
}
public String getCreateTemporaryTablePostfix() {
return "";
}
public boolean dropTemporaryTableAfterUse() {
return true;
}
// IDENTITY support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public boolean supportsIdentityColumns() {
return true;
}
public Class getNativeIdentifierGeneratorClass() {
return IdentityGenerator.class;
}
public boolean hasDataTypeInIdentityColumn() {
// Whether this dialect has an Identity clause added to the data type or a completely seperate identity
// data type
return true;
}
public String getIdentityColumnString() throws MappingException {
// The keyword used to specify an identity column, if identity column key generation is supported.
return "identity";
}
public String getIdentitySelectString() {
return "SELECT LAST_IDENTITY() FROM %TSQL_sys.snf";
}
// SEQUENCE support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public boolean supportsSequences() {
return false;
}
// It really does support sequences, but InterSystems elects to suggest usage of IDENTITY instead :/
// Anyway, below are the actual support overrides for users wanting to use this combo...
//
// public String getSequenceNextValString(String sequenceName) {
// return "select InterSystems.Sequences_GetNext('" + sequenceName + "') from InterSystems.Sequences where ucase(name)=ucase('" + sequenceName + "')";
// }
//
// public String getSelectSequenceNextValString(String sequenceName) {
// return "(select InterSystems.Sequences_GetNext('" + sequenceName + "') from InterSystems.Sequences where ucase(name)=ucase('" + sequenceName + "'))";
// }
//
// public String getCreateSequenceString(String sequenceName) {
// return "insert into InterSystems.Sequences(Name) values (ucase('" + sequenceName + "'))";
// }
//
// public String getDropSequenceString(String sequenceName) {
// return "delete from InterSystems.Sequences where ucase(name)=ucase('" + sequenceName + "')";
// }
//
// public String getQuerySequencesString() {
// return "select name from InterSystems.Sequences";
// }
// lock acquisition support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public boolean supportsForUpdate() {
// Does this dialect support the FOR UPDATE syntax?
return false;
}
public boolean supportsForUpdateOf() {
// Does this dialect support FOR UPDATE OF, allowing particular rows to be locked?
return false;
}
public boolean supportsForUpdateNowait() {
// Does this dialect support the Oracle-style FOR UPDATE NOWAIT syntax?
return false;
}
public boolean supportsOuterJoinForUpdate() {
return false;
}
public LockingStrategy getLockingStrategy(Lockable lockable, LockMode lockMode) {
// InterSystems Cache' does not current support "SELECT ... FOR UPDATE" syntax...
// Set your transaction mode to READ_COMMITTED before using
if ( lockMode==LockMode.PESSIMISTIC_FORCE_INCREMENT) {
return new PessimisticForceIncrementLockingStrategy( lockable, lockMode);
}
else if ( lockMode==LockMode.PESSIMISTIC_WRITE) {
return new PessimisticWriteUpdateLockingStrategy( lockable, lockMode);
}
else if ( lockMode==LockMode.PESSIMISTIC_READ) {
return new PessimisticReadUpdateLockingStrategy( lockable, lockMode);
}
else if ( lockMode==LockMode.OPTIMISTIC) {
return new OptimisticLockingStrategy( lockable, lockMode);
}
else if ( lockMode==LockMode.OPTIMISTIC_FORCE_INCREMENT) {
return new OptimisticForceIncrementLockingStrategy( lockable, lockMode);
}
else if ( lockMode.greaterThan( LockMode.READ ) ) {
return new UpdateLockingStrategy( lockable, lockMode );
}
else {
return new SelectLockingStrategy( lockable, lockMode );
}
}
// LIMIT support (ala TOP) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public boolean supportsLimit() {
return true;
}
public boolean supportsLimitOffset() {
return false;
}
public boolean supportsVariableLimit() {
return true;
}
public boolean bindLimitParametersFirst() {
// Does the LIMIT clause come at the start of the SELECT statement, rather than at the end?
return true;
}
public boolean useMaxForLimit() {
// Does the LIMIT clause take a "maximum" row number instead of a total number of returned rows?
return true;
}
public String getLimitString(String sql, boolean hasOffset) {
if ( hasOffset ) {
throw new UnsupportedOperationException( "query result offset is not supported" );
}
// This does not support the Cache SQL 'DISTINCT BY (comma-list)' extensions,
// but this extension is not supported through Hibernate anyway.
int insertionPoint = sql.startsWith( "select distinct" ) ? 15 : 6;
return new StringBuilder( sql.length() + 8 )
.append( sql )
.insert( insertionPoint, " TOP ? " )
.toString();
}
// callable statement support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public int registerResultSetOutParameter(CallableStatement statement, int col) throws SQLException {
return col;
}
public ResultSet getResultSet(CallableStatement ps) throws SQLException {
ps.execute();
return ( ResultSet ) ps.getObject( 1 );
}
// miscellaneous support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public String getLowercaseFunction() {
// The name of the SQL function that transforms a string to lowercase
return "lower";
}
public String getNullColumnString() {
// The keyword used to specify a nullable column.
return " null";
}
public JoinFragment createOuterJoinFragment() {
// Create an OuterJoinGenerator for this dialect.
return new CacheJoinFragment();
}
public String getNoColumnsInsertString() {
// The keyword used to insert a row without specifying
// any column values
return " default values";
}
public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
return new CacheSQLExceptionConversionDelegate( this );
}
public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter() {
return EXTRACTER;
}
public static final ViolatedConstraintNameExtracter EXTRACTER = new TemplatedViolatedConstraintNameExtracter() {
/**
* Extract the name of the violated constraint from the given SQLException.
*
* @param sqle The exception that was the result of the constraint violation.
* @return The extracted constraint name.
*/
public String extractConstraintName(SQLException sqle) {
return extractUsingTemplate( "constraint (", ") violated", sqle.getMessage() );
}
};
// Overridden informational metadata ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public boolean supportsEmptyInList() {
return false;
}
public boolean areStringComparisonsCaseInsensitive() {
return true;
}
public boolean supportsResultSetPositionQueryMethodsOnForwardOnlyCursor() {
return false;
}
}