//$Id: Oracle8iDialect.java 16565 2009-05-13 22:48:45Z [email protected] $
package org.hibernate.dialect;
import java.sql.Types;
import java.sql.SQLException;
import java.sql.ResultSet;
import java.sql.CallableStatement;
import org.hibernate.sql.CaseFragment;
import org.hibernate.sql.DecodeCaseFragment;
import org.hibernate.sql.JoinFragment;
import org.hibernate.sql.OracleJoinFragment;
import org.hibernate.cfg.Environment;
import org.hibernate.dialect.function.StandardSQLFunction;
import org.hibernate.dialect.function.NoArgSQLFunction;
import org.hibernate.dialect.function.VarArgsSQLFunction;
import org.hibernate.dialect.function.SQLFunctionTemplate;
import org.hibernate.dialect.function.NvlFunction;
import org.hibernate.Hibernate;
import org.hibernate.HibernateException;
import org.hibernate.util.ReflectHelper;
import org.hibernate.exception.ViolatedConstraintNameExtracter;
import org.hibernate.exception.TemplatedViolatedConstraintNameExtracter;
import org.hibernate.exception.JDBCExceptionHelper;
/**
* A dialect for Oracle 8i.
*
* @author Steve Ebersole
*/
public class Oracle8iDialect extends Dialect {
public Oracle8iDialect() {
super();
registerCharacterTypeMappings();
registerNumericTypeMappings();
registerDateTimeTypeMappings();
registerLargeObjectTypeMappings();
registerReverseHibernateTypeMappings();
registerFunctions();
registerDefaultProperties();
}
protected void registerCharacterTypeMappings() {
registerColumnType( Types.CHAR, "char(1)" );
registerColumnType( Types.VARCHAR, 4000, "varchar2($l)" );
registerColumnType( Types.VARCHAR, "long" );
}
protected void registerNumericTypeMappings() {
registerColumnType( Types.BIT, "number(1,0)" );
registerColumnType( Types.BIGINT, "number(19,0)" );
registerColumnType( Types.SMALLINT, "number(5,0)" );
registerColumnType( Types.TINYINT, "number(3,0)" );
registerColumnType( Types.INTEGER, "number(10,0)" );
registerColumnType( Types.FLOAT, "float" );
registerColumnType( Types.DOUBLE, "double precision" );
registerColumnType( Types.NUMERIC, "number($p,$s)" );
registerColumnType( Types.DECIMAL, "number($p,$s)" );
}
protected void registerDateTimeTypeMappings() {
registerColumnType( Types.DATE, "date" );
registerColumnType( Types.TIME, "date" );
registerColumnType( Types.TIMESTAMP, "date" );
}
protected void registerLargeObjectTypeMappings() {
registerColumnType( Types.VARBINARY, 2000, "raw($l)" );
registerColumnType( Types.VARBINARY, "long raw" );
registerColumnType( Types.BLOB, "blob" );
registerColumnType( Types.CLOB, "clob" );
}
protected void registerReverseHibernateTypeMappings() {
}
protected void registerFunctions() {
registerFunction( "abs", new StandardSQLFunction("abs") );
registerFunction( "sign", new StandardSQLFunction("sign", Hibernate.INTEGER) );
registerFunction( "acos", new StandardSQLFunction("acos", Hibernate.DOUBLE) );
registerFunction( "asin", new StandardSQLFunction("asin", Hibernate.DOUBLE) );
registerFunction( "atan", new StandardSQLFunction("atan", Hibernate.DOUBLE) );
registerFunction( "cos", new StandardSQLFunction("cos", Hibernate.DOUBLE) );
registerFunction( "cosh", new StandardSQLFunction("cosh", Hibernate.DOUBLE) );
registerFunction( "exp", new StandardSQLFunction("exp", Hibernate.DOUBLE) );
registerFunction( "ln", new StandardSQLFunction("ln", Hibernate.DOUBLE) );
registerFunction( "sin", new StandardSQLFunction("sin", Hibernate.DOUBLE) );
registerFunction( "sinh", new StandardSQLFunction("sinh", Hibernate.DOUBLE) );
registerFunction( "stddev", new StandardSQLFunction("stddev", Hibernate.DOUBLE) );
registerFunction( "sqrt", new StandardSQLFunction("sqrt", Hibernate.DOUBLE) );
registerFunction( "tan", new StandardSQLFunction("tan", Hibernate.DOUBLE) );
registerFunction( "tanh", new StandardSQLFunction("tanh", Hibernate.DOUBLE) );
registerFunction( "variance", new StandardSQLFunction("variance", Hibernate.DOUBLE) );
registerFunction( "round", new StandardSQLFunction("round") );
registerFunction( "trunc", new StandardSQLFunction("trunc") );
registerFunction( "ceil", new StandardSQLFunction("ceil") );
registerFunction( "floor", new StandardSQLFunction("floor") );
registerFunction( "chr", new StandardSQLFunction("chr", Hibernate.CHARACTER) );
registerFunction( "initcap", new StandardSQLFunction("initcap") );
registerFunction( "lower", new StandardSQLFunction("lower") );
registerFunction( "ltrim", new StandardSQLFunction("ltrim") );
registerFunction( "rtrim", new StandardSQLFunction("rtrim") );
registerFunction( "soundex", new StandardSQLFunction("soundex") );
registerFunction( "upper", new StandardSQLFunction("upper") );
registerFunction( "ascii", new StandardSQLFunction("ascii", Hibernate.INTEGER) );
registerFunction( "length", new StandardSQLFunction("length", Hibernate.LONG) );
registerFunction( "to_char", new StandardSQLFunction("to_char", Hibernate.STRING) );
registerFunction( "to_date", new StandardSQLFunction("to_date", Hibernate.TIMESTAMP) );
registerFunction( "current_date", new NoArgSQLFunction("current_date", Hibernate.DATE, false) );
registerFunction( "current_time", new NoArgSQLFunction("current_timestamp", Hibernate.TIME, false) );
registerFunction( "current_timestamp", new NoArgSQLFunction("current_timestamp", Hibernate.TIMESTAMP, false) );
registerFunction( "last_day", new StandardSQLFunction("last_day", Hibernate.DATE) );
registerFunction( "sysdate", new NoArgSQLFunction("sysdate", Hibernate.DATE, false) );
registerFunction( "systimestamp", new NoArgSQLFunction("systimestamp", Hibernate.TIMESTAMP, false) );
registerFunction( "uid", new NoArgSQLFunction("uid", Hibernate.INTEGER, false) );
registerFunction( "user", new NoArgSQLFunction("user", Hibernate.STRING, false) );
registerFunction( "rowid", new NoArgSQLFunction("rowid", Hibernate.LONG, false) );
registerFunction( "rownum", new NoArgSQLFunction("rownum", Hibernate.LONG, false) );
// Multi-param string dialect functions...
registerFunction( "concat", new VarArgsSQLFunction(Hibernate.STRING, "", "||", "") );
registerFunction( "instr", new StandardSQLFunction("instr", Hibernate.INTEGER) );
registerFunction( "instrb", new StandardSQLFunction("instrb", Hibernate.INTEGER) );
registerFunction( "lpad", new StandardSQLFunction("lpad", Hibernate.STRING) );
registerFunction( "replace", new StandardSQLFunction("replace", Hibernate.STRING) );
registerFunction( "rpad", new StandardSQLFunction("rpad", Hibernate.STRING) );
registerFunction( "substr", new StandardSQLFunction("substr", Hibernate.STRING) );
registerFunction( "substrb", new StandardSQLFunction("substrb", Hibernate.STRING) );
registerFunction( "translate", new StandardSQLFunction("translate", Hibernate.STRING) );
registerFunction( "substring", new StandardSQLFunction( "substr", Hibernate.STRING ) );
registerFunction( "locate", new SQLFunctionTemplate( Hibernate.INTEGER, "instr(?2,?1)" ) );
registerFunction( "bit_length", new SQLFunctionTemplate( Hibernate.INTEGER, "vsize(?1)*8" ) );
registerFunction( "coalesce", new NvlFunction() );
// Multi-param numeric dialect functions...
registerFunction( "atan2", new StandardSQLFunction("atan2", Hibernate.FLOAT) );
registerFunction( "log", new StandardSQLFunction("log", Hibernate.INTEGER) );
registerFunction( "mod", new StandardSQLFunction("mod", Hibernate.INTEGER) );
registerFunction( "nvl", new StandardSQLFunction("nvl") );
registerFunction( "nvl2", new StandardSQLFunction("nvl2") );
registerFunction( "power", new StandardSQLFunction("power", Hibernate.FLOAT) );
// Multi-param date dialect functions...
registerFunction( "add_months", new StandardSQLFunction("add_months", Hibernate.DATE) );
registerFunction( "months_between", new StandardSQLFunction("months_between", Hibernate.FLOAT) );
registerFunction( "next_day", new StandardSQLFunction("next_day", Hibernate.DATE) );
registerFunction( "str", new StandardSQLFunction("to_char", Hibernate.STRING) );
}
protected void registerDefaultProperties() {
getDefaultProperties().setProperty( Environment.USE_STREAMS_FOR_BINARY, "true" );
getDefaultProperties().setProperty( Environment.STATEMENT_BATCH_SIZE, DEFAULT_BATCH_SIZE );
// Oracle driver reports to support getGeneratedKeys(), but they only
// support the version taking an array of the names of the columns to
// be returned (via its RETURNING clause). No other driver seems to
// support this overloaded version.
getDefaultProperties().setProperty( Environment.USE_GET_GENERATED_KEYS, "false" );
}
// features which change between 8i, 9i, and 10g ~~~~~~~~~~~~~~~~~~~~~~~~~~
/**
* Support for the oracle proprietary join syntax...
*
* @return The orqacle join fragment
*/
public JoinFragment createOuterJoinFragment() {
return new OracleJoinFragment();
}
/**
* Map case support to the Oracle DECODE function. Oracle did not
* add support for CASE until 9i.
*
* @return The oracle CASE -> DECODE fragment
*/
public CaseFragment createCaseFragment() {
return new DecodeCaseFragment();
}
public String getLimitString(String sql, boolean hasOffset) {
sql = sql.trim();
boolean isForUpdate = false;
if ( sql.toLowerCase().endsWith(" for update") ) {
sql = sql.substring( 0, sql.length()-11 );
isForUpdate = true;
}
StringBuffer pagingSelect = new StringBuffer( sql.length()+100 );
if (hasOffset) {
pagingSelect.append("select * from ( select row_.*, rownum rownum_ from ( ");
}
else {
pagingSelect.append("select * from ( ");
}
pagingSelect.append(sql);
if (hasOffset) {
pagingSelect.append(" ) row_ ) where rownum_ <= ? and rownum_ > ?");
}
else {
pagingSelect.append(" ) where rownum <= ?");
}
if ( isForUpdate ) {
pagingSelect.append( " for update" );
}
return pagingSelect.toString();
}
/**
* Allows access to the basic {@link Dialect#getSelectClauseNullString}
* implementation...
*
* @param sqlType The {@link java.sql.Types} mapping type code
* @return The appropriate select cluse fragment
*/
public String getBasicSelectClauseNullString(int sqlType) {
return super.getSelectClauseNullString( sqlType );
}
public String getSelectClauseNullString(int sqlType) {
switch(sqlType) {
case Types.VARCHAR:
case Types.CHAR:
return "to_char(null)";
case Types.DATE:
case Types.TIMESTAMP:
case Types.TIME:
return "to_date(null)";
default:
return "to_number(null)";
}
}
public String getCurrentTimestampSelectString() {
return "select sysdate from dual";
}
public String getCurrentTimestampSQLFunctionName() {
return "sysdate";
}
// features which remain constant across 8i, 9i, and 10g ~~~~~~~~~~~~~~~~~~
public String getAddColumnString() {
return "add";
}
public String getSequenceNextValString(String sequenceName) {
return "select " + getSelectSequenceNextValString( sequenceName ) + " from dual";
}
public String getSelectSequenceNextValString(String sequenceName) {
return sequenceName + ".nextval";
}
public String getCreateSequenceString(String sequenceName) {
return "create sequence " + sequenceName; //starts with 1, implicitly
}
public String getDropSequenceString(String sequenceName) {
return "drop sequence " + sequenceName;
}
public String getCascadeConstraintsString() {
return " cascade constraints";
}
public boolean dropConstraints() {
return false;
}
public String getForUpdateNowaitString() {
return " for update nowait";
}
public boolean supportsSequences() {
return true;
}
public boolean supportsPooledSequences() {
return true;
}
public boolean supportsLimit() {
return true;
}
public String getForUpdateString(String aliases) {
return getForUpdateString() + " of " + aliases;
}
public String getForUpdateNowaitString(String aliases) {
return getForUpdateString() + " of " + aliases + " nowait";
}
public boolean bindLimitParametersInReverseOrder() {
return true;
}
public boolean useMaxForLimit() {
return true;
}
public boolean forUpdateOfColumns() {
return true;
}
public String getQuerySequencesString() {
return "select sequence_name from user_sequences";
}
public String getSelectGUIDString() {
return "select rawtohex(sys_guid()) from dual";
}
public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter() {
return EXTRACTER;
}
private static 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) {
int errorCode = JDBCExceptionHelper.extractErrorCode(sqle);
if ( errorCode == 1 || errorCode == 2291 || errorCode == 2292 ) {
return extractUsingTemplate( "constraint (", ") violated", sqle.getMessage() );
}
else if ( errorCode == 1400 ) {
// simple nullability constraint
return null;
}
else {
return null;
}
}
};
public static final String ORACLE_TYPES_CLASS_NAME = "oracle.jdbc.OracleTypes";
public static final String DEPRECATED_ORACLE_TYPES_CLASS_NAME = "oracle.jdbc.driver.OracleTypes";
public static final int INIT_ORACLETYPES_CURSOR_VALUE = -99;
// not final-static to avoid possible classcast exceptions if using different oracle drivers.
private int oracleCursorTypeSqlType = INIT_ORACLETYPES_CURSOR_VALUE;
public int getOracleCursorTypeSqlType() {
if ( oracleCursorTypeSqlType == INIT_ORACLETYPES_CURSOR_VALUE ) {
// todo : is there really any reason to kkeep trying if this fails once?
oracleCursorTypeSqlType = extractOracleCursorTypeValue();
}
return oracleCursorTypeSqlType;
}
protected int extractOracleCursorTypeValue() {
Class oracleTypesClass;
try {
oracleTypesClass = ReflectHelper.classForName( ORACLE_TYPES_CLASS_NAME );
}
catch ( ClassNotFoundException cnfe ) {
try {
oracleTypesClass = ReflectHelper.classForName( DEPRECATED_ORACLE_TYPES_CLASS_NAME );
}
catch ( ClassNotFoundException e ) {
throw new HibernateException( "Unable to locate OracleTypes class", e );
}
}
try {
return oracleTypesClass.getField( "CURSOR" ).getInt( null );
}
catch ( Exception se ) {
throw new HibernateException( "Unable to access OracleTypes.CURSOR value", se );
}
}
public int registerResultSetOutParameter(CallableStatement statement, int col) throws SQLException {
// register the type of the out param - an Oracle specific type
statement.registerOutParameter( col, getOracleCursorTypeSqlType() );
col++;
return col;
}
public ResultSet getResultSet(CallableStatement ps) throws SQLException {
ps.execute();
return ( ResultSet ) ps.getObject( 1 );
}
public boolean supportsUnionAll() {
return true;
}
public boolean supportsCommentOn() {
return true;
}
public boolean supportsTemporaryTables() {
return true;
}
public String generateTemporaryTableName(String baseTableName) {
String name = super.generateTemporaryTableName(baseTableName);
return name.length() > 30 ? name.substring( 1, 30 ) : name;
}
public String getCreateTemporaryTableString() {
return "create global temporary table";
}
public String getCreateTemporaryTablePostfix() {
return "on commit delete rows";
}
public boolean dropTemporaryTableAfterUse() {
return false;
}
public boolean supportsCurrentTimestampSelection() {
return true;
}
public boolean isCurrentTimestampSelectStringCallable() {
return false;
}
// Overridden informational metadata ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public boolean supportsEmptyInList() {
return false;
}
public boolean supportsExistsInSelect() {
return false;
}
}
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