/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates, IBM Corporation. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
* 09/14/2011-2.3.1 Guy Pelletier
* - 357533: Allow DDL queries to execute even when Multitenant entities are part of the PU
* 02/02/2015-2.6.0 Rick Curtis
* - 458204: Fix stored procedure termination character.
* 02/19/2015 - Rick Curtis
* - 458877 : Add national character support
* 02/23/2015-2.6 Dalia Abo Sheasha
* - 460607: Change DatabasePlatform StoredProcedureTerminationToken to be configurable
* 03/18/2015-2.6.0 Jody Grassel
* - 462511 : Update to SybasePlatform to support pessimistic locking
*****************************************************************************/
package org.eclipse.persistence.platform.database;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Calendar;
import java.util.Collection;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
import java.util.Vector;
import org.eclipse.persistence.exceptions.ValidationException;
import org.eclipse.persistence.expressions.ExpressionOperator;
import org.eclipse.persistence.internal.databaseaccess.FieldTypeDefinition;
import org.eclipse.persistence.internal.expressions.RelationExpression;
import org.eclipse.persistence.internal.helper.ClassConstants;
import org.eclipse.persistence.internal.helper.DatabaseTable;
import org.eclipse.persistence.internal.helper.Helper;
import org.eclipse.persistence.internal.helper.NonSynchronizedVector;
import org.eclipse.persistence.internal.sessions.AbstractSession;
import org.eclipse.persistence.queries.ValueReadQuery;
/**
* <p><b>Purpose</b>: Provides Sybase ASE specific behavior.
* <p><b>Responsibilities</b>:<ul>
* <li> Native SQL for byte[], Date, Time, {@literal &} Timestamp.
* <li> Native sequencing using @@IDENTITY.
* </ul>
*
* @since TOPLink/Java 1.0
*/
public class SybasePlatform extends org.eclipse.persistence.platform.database.DatabasePlatform {
// An array could be used here with the type being the index, but upon looking at the source some types are
// assigned negative values, making them unusable as indexes without guessing at modifying them.
// this attribute is used for registering output params in stored procedure calls. JConnect 5.5 requires
// that the API that accepts a string is called so we have a collection of strings to use.
protected Map typeStrings;
public SybasePlatform(){
super();
this.pingSQL = "SELECT 1";
this.storedProcedureTerminationToken = "\ngo";
}
@Override
public void initializeConnectionData(Connection connection) throws SQLException {
DatabaseMetaData dmd = connection.getMetaData();
this.driverSupportsNationalCharacterVarying = Helper.compareVersions(dmd.getDriverVersion(), "7.0.0") >= 0;
}
protected Map<Integer, String> getTypeStrings() {
if (typeStrings == null) {
initializeTypeStrings();
}
return typeStrings;
}
protected synchronized void initializeTypeStrings() {
if (typeStrings == null) {
Map<Integer, String> types = new HashMap<>(30);
types.put(Types.ARRAY, "ARRAY");
types.put(Types.BIGINT, "BIGINT");
types.put(Types.BINARY, "BINARY");
types.put(Types.BIT, "BIT");
types.put(Types.BLOB, "BLOB");
types.put(Types.CHAR, "CHAR");
types.put(Types.CLOB, "CLOB");
types.put(Types.DATE, "DATE");
types.put(Types.DECIMAL, "DECIMAL");
types.put(Types.DOUBLE, "DOUBLE");
types.put(Types.FLOAT, "FLOAT");
types.put(Types.INTEGER, "INTEGER");
types.put(Types.JAVA_OBJECT, "JAVA_OBJECT");
types.put(Types.LONGVARBINARY, "LONGVARBINARY");
types.put(Types.LONGVARCHAR, "LONGVARCHAR");
types.put(Types.NULL, "NULL");
types.put(Types.NUMERIC, "NUMERIC");
types.put(Types.OTHER, "OTHER");
types.put(Types.REAL, "REAL");
types.put(Types.REF, "REF");
types.put(Types.SMALLINT, "SMALLINT");
types.put(Types.STRUCT, "STRUCT");
types.put(Types.TIME, "TIME");
types.put(Types.TIMESTAMP, "TIMESTAMP");
types.put(Types.TINYINT, "TINYINT");
types.put(Types.VARBINARY, "VARBINARY");
types.put(Types.VARCHAR, "VARCHAR");
this.typeStrings = types;
}
}
/**
* Sybase and SQL Anywhere do not support BLOB/CLOB but require LONGVARBINARY/LONGVARCHAR.
*/
@Override
public int getJDBCType(Class javaType) {
if (javaType == ClassConstants.BLOB) {
return Types.LONGVARBINARY;
} else if (javaType == ClassConstants.CLOB) {
return Types.LONGVARCHAR;
} else {
return super.getJDBCType(javaType);
}
}
/**
* If using native SQL then print a byte[] as '0xFF...'
*/
@Override
protected void appendByteArray(byte[] bytes, Writer writer) throws IOException {
if (usesNativeSQL() && (!usesByteArrayBinding())) {
writer.write("0x");
Helper.writeHexString(bytes, writer);
} else {
super.appendByteArray(bytes, writer);
}
}
/**
* Answer a platform correct string representation of a Date, suitable for SQL generation.
* Native format: 'yyyy-mm-dd
*/
@Override
protected void appendDate(java.sql.Date date, Writer writer) throws IOException {
if (usesNativeSQL()) {
writer.write("'");
writer.write(Helper.printDate(date));
writer.write("'");
} else {
super.appendDate(date, writer);
}
}
/**
* Write a timestamp in Sybase specific format (yyyy-mm-dd-hh.mm.ss.fff).
*/
protected void appendSybaseTimestamp(java.sql.Timestamp timestamp, Writer writer) throws IOException {
writer.write("'");
writer.write(Helper.printTimestampWithoutNanos(timestamp));
writer.write(':');
// Must truncate the nanos to three decimal places,
// it is actually a complex algorithm...
String nanoString = Integer.toString(timestamp.getNanos());
int numberOfZeros = 0;
for (int num = Math.min(9 - nanoString.length(), 3); num > 0; num--) {
writer.write('0');
numberOfZeros++;
}
if ((nanoString.length() + numberOfZeros) > 3) {
nanoString = nanoString.substring(0, (3 - numberOfZeros));
}
writer.write(nanoString);
writer.write("'");
}
/**
* Answer a platform correct string representation of a Time, suitable for SQL generation.
* The time is printed in the ODBC platform independent format {t'hh:mm:ss'}.
*/
@Override
protected void appendTime(java.sql.Time time, Writer writer) throws IOException {
if (usesNativeSQL()) {
writer.write("'");
writer.write(Helper.printTime(time));
writer.write("'");
} else {
super.appendTime(time, writer);
}
}
/**
* Answer a platform correct string representation of a Timestamp, suitable for SQL generation.
* The date is printed in the ODBC platform independent format {d'YYYY-MM-DD'}.
*/
@Override
protected void appendTimestamp(java.sql.Timestamp timestamp, Writer writer) throws IOException {
if (usesNativeSQL()) {
appendSybaseTimestamp(timestamp, writer);
} else {
super.appendTimestamp(timestamp, writer);
}
}
/**
* Answer a platform correct string representation of a Calendar, suitable for SQL generation.
* The date is printed in the ODBC platform independent format {d'YYYY-MM-DD'}.
*/
@Override
protected void appendCalendar(Calendar calendar, Writer writer) throws IOException {
if (usesNativeSQL()) {
appendSybaseCalendar(calendar, writer);
} else {
super.appendCalendar(calendar, writer);
}
}
/**
* Write a timestamp in Sybase specific format ( yyyy-mm-dd-hh.mm.ss.fff)
*/
protected void appendSybaseCalendar(Calendar calendar, Writer writer) throws IOException {
writer.write("'");
writer.write(Helper.printCalendar(calendar));
writer.write("'");
}
/**
* INTERNAL:
* Build operator.
*/
public ExpressionOperator atan2Operator() {
return ExpressionOperator.simpleTwoArgumentFunction(ExpressionOperator.Atan2, "ATN2");
}
@Override
protected Hashtable buildFieldTypes() {
Hashtable fieldTypeMapping;
fieldTypeMapping = new Hashtable();
fieldTypeMapping.put(Boolean.class, new FieldTypeDefinition("BIT default 0", false, false));
fieldTypeMapping.put(Integer.class, new FieldTypeDefinition("INTEGER", false));
fieldTypeMapping.put(Long.class, new FieldTypeDefinition("NUMERIC", 19));
fieldTypeMapping.put(Float.class, new FieldTypeDefinition("FLOAT(16)", false));
fieldTypeMapping.put(Double.class, new FieldTypeDefinition("FLOAT(32)", false));
fieldTypeMapping.put(Short.class, new FieldTypeDefinition("SMALLINT", false));
fieldTypeMapping.put(Byte.class, new FieldTypeDefinition("SMALLINT", false));
fieldTypeMapping.put(java.math.BigInteger.class, new FieldTypeDefinition("NUMERIC", 38));
fieldTypeMapping.put(java.math.BigDecimal.class, new FieldTypeDefinition("NUMERIC", 38).setLimits(38, -19, 19));
fieldTypeMapping.put(Number.class, new FieldTypeDefinition("NUMERIC", 38).setLimits(38, -19, 19));
if(getUseNationalCharacterVaryingTypeForString()){
// http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.infocenter.dc36271.1570/html/blocks/CIHJCBJF.htm
fieldTypeMapping.put(String.class, new FieldTypeDefinition("UNIVARCHAR", DEFAULT_VARCHAR_SIZE));
} else {
fieldTypeMapping.put(String.class, new FieldTypeDefinition("VARCHAR", DEFAULT_VARCHAR_SIZE));
}
fieldTypeMapping.put(Character.class, new FieldTypeDefinition("CHAR", 1));
fieldTypeMapping.put(Byte[].class, new FieldTypeDefinition("IMAGE", false));
fieldTypeMapping.put(Character[].class, new FieldTypeDefinition("TEXT", false));
fieldTypeMapping.put(byte[].class, new FieldTypeDefinition("IMAGE", false));
fieldTypeMapping.put(char[].class, new FieldTypeDefinition("TEXT", false));
fieldTypeMapping.put(java.sql.Blob.class, new FieldTypeDefinition("IMAGE", false));
fieldTypeMapping.put(java.sql.Clob.class, new FieldTypeDefinition("TEXT", false));
fieldTypeMapping.put(java.sql.Date.class, new FieldTypeDefinition("DATETIME", false));
fieldTypeMapping.put(java.sql.Time.class, new FieldTypeDefinition("DATETIME", false));
fieldTypeMapping.put(java.sql.Timestamp.class, new FieldTypeDefinition("DATETIME", false));
return fieldTypeMapping;
}
/**
* INTERNAL:
* Build the identity query for native sequencing.
*/
@Override
public ValueReadQuery buildSelectQueryForIdentity() {
ValueReadQuery selectQuery = new ValueReadQuery();
StringWriter writer = new StringWriter();
writer.write("SELECT @@IDENTITY");
selectQuery.setSQLString(writer.toString());
return selectQuery;
}
/**
* The sybase syntax for obtaining pessimistic lock is "SELECT ADDRESS_ID, ... FROM ADDRESS WITH (HOLDLOCK) WHERE (ADDRESS_ID = ?)"
* Please note that above only obtains shared lock. Apparently there is no way to obtain exclusive lock on Sybase
* using only a select statement
*/
@Override
public boolean shouldPrintLockingClauseAfterWhereClause() {
return true;
}
@Override
public String getSelectForUpdateString() {
return " FOR UPDATE AT ISOLATION SERIALIZABLE";
}
/**
* Used for batch writing and sp defs.
*/
@Override
public String getBatchDelimiterString() {
return "";
}
/* This method is used to print the required output parameter token for the
* specific platform. Used when stored procedures are created.
*/
@Override
public String getCreationInOutputProcedureToken() {
return getInOutputProcedureToken();
}
/*
* this method was added because SQLServer requires the output paramater token
* to be set on creation but not on execution.
*/
@Override
public String getCreationOutputProcedureToken() {
return getOutputProcedureToken();
}
/* This method is used to print the output parameter token when stored
* procedures are called
*/
@Override
public String getInOutputProcedureToken() {
return "OUT";
}
/**
* INTERNAL:
* Returns the type name corresponding to the jdbc type
*/
@Override
public String getJdbcTypeName(int jdbcType) {
return getTypeStrings().get(jdbcType);
}
/**
* INTERNAL:
* returns the maximum number of characters that can be used in a field
* name on this platform.
*/
@Override
public int getMaxFieldNameSize() {
return 22;
}
/**
* Return the catalog information through using the native SQL catalog selects.
* This is required because many JDBC driver do not support meta-data.
* Willcards can be passed as arguments.
*/
public Vector getNativeTableInfo(String table, String creator, AbstractSession session) {
// need to filter only tables / views
String query = "SELECT * FROM sysobjects WHERE table_type <> 'SYSTEM_TABLE'";
if (table != null) {
if (table.indexOf('%') != -1) {
query = query + " AND table_name LIKE " + table;
} else {
query = query + " AND table_name = " + table;
}
}
if (creator != null) {
if (creator.indexOf('%') != -1) {
query = query + " AND table_owner LIKE " + creator;
} else {
query = query + " AND table_owner = " + creator;
}
}
return session.executeSelectingCall(new org.eclipse.persistence.queries.SQLCall(query));
}
/* This method is used to print the output parameter token when stored
* procedures are called
*/
@Override
public String getOutputProcedureToken() {
return useJDBCStoredProcedureSyntax() ? "" : "OUTPUT";
}
/**
* Used for sp defs.
*/
@Override
public String getProcedureArgumentString() {
return "@";
}
/**
* Used for sp calls.
*/
@Override
public String getProcedureCallHeader() {
return useJDBCStoredProcedureSyntax() ? "{Call " : "EXECUTE ";
}
@Override
public String getProcedureCallTail() {
return useJDBCStoredProcedureSyntax() ? "}" : "";
}
/**
* Return true if this platform is to use the JDBC supported syntax for executing stored procedures.
* If the driver is known to be the DataDirec driver, and the value is not set, then set to true and return.
*/
public boolean useJDBCStoredProcedureSyntax() {
if (useJDBCStoredProcedureSyntax == null) {
useJDBCStoredProcedureSyntax = this.driverName != null && this.driverName.equals("Sybase");
}
return useJDBCStoredProcedureSyntax;
}
@Override
public String getStoredProcedureParameterPrefix() {
return "@";
}
/**
* PUBLIC:
* This method returns the query to select the timestamp
* from the server for Sybase.
*/
@Override
public ValueReadQuery getTimestampQuery() {
if (timestampQuery == null) {
timestampQuery = new ValueReadQuery();
timestampQuery.setSQLString("SELECT GETDATE()");
timestampQuery.setAllowNativeSQLQuery(true);
}
return timestampQuery;
}
/**
* Initialize any platform-specific operators
*/
@Override
protected void initializePlatformOperators() {
super.initializePlatformOperators();
addOperator(operatorOuterJoin());
addOperator(ExpressionOperator.simpleFunction(ExpressionOperator.Today, "GETDATE"));
// GETDATE returns both date and time. It is not the perfect match for
// ExpressionOperator.currentDate and ExpressionOperator.currentTime
// However, there is no known function on sql server that returns just
// the date or just the time.
addOperator(ExpressionOperator.simpleFunction(ExpressionOperator.CurrentDate, "GETDATE"));
addOperator(ExpressionOperator.simpleFunction(ExpressionOperator.CurrentTime, "GETDATE"));
addOperator(ExpressionOperator.simpleFunction(ExpressionOperator.Length, "CHAR_LENGTH"));
addOperator(ExpressionOperator.sybaseLocateOperator());
addOperator(ExpressionOperator.sybaseLocate2Operator());
addOperator(ExpressionOperator.simpleThreeArgumentFunction(ExpressionOperator.Substring, "SUBSTRING"));
addOperator(singleArgumentSubstringOperator());
addOperator(ExpressionOperator.addDate());
addOperator(ExpressionOperator.dateName());
addOperator(ExpressionOperator.datePart());
addOperator(ExpressionOperator.dateDifference());
addOperator(ExpressionOperator.difference());
addOperator(ExpressionOperator.charIndex());
addOperator(ExpressionOperator.charLength());
addOperator(ExpressionOperator.reverse());
addOperator(ExpressionOperator.replicate());
addOperator(ExpressionOperator.right());
addOperator(ExpressionOperator.cot());
addOperator(ExpressionOperator.sybaseAtan2Operator());
addOperator(ExpressionOperator.sybaseAddMonthsOperator());
addOperator(ExpressionOperator.sybaseInStringOperator());
// bug 3061144
addOperator(ExpressionOperator.simpleTwoArgumentFunction(ExpressionOperator.Nvl, "ISNULL"));
// CR### TO_NUMBER, TO_CHAR, TO_DATE is CONVERT(type, ?)
addOperator(ExpressionOperator.sybaseToNumberOperator());
addOperator(ExpressionOperator.sybaseToDateToStringOperator());
addOperator(ExpressionOperator.sybaseToDateOperator());
addOperator(ExpressionOperator.sybaseToCharOperator());
addOperator(ExpressionOperator.simpleFunction(ExpressionOperator.Ceil, "CEILING"));
addOperator(modOperator());
addOperator(trimOperator());
addOperator(trim2Operator());
// Sybase does not define REPLACE only STR_REPLACE
addOperator(ExpressionOperator.simpleThreeArgumentFunction(ExpressionOperator.Replace, "STR_REPLACE"));
addOperator(extractOperator());
}
/**
* INTERNAL:
* Derby does not support EXTRACT, but does have DATEPART.
*/
public static ExpressionOperator extractOperator() {
ExpressionOperator exOperator = new ExpressionOperator();
exOperator.setType(ExpressionOperator.FunctionOperator);
exOperator.setSelector(ExpressionOperator.Extract);
exOperator.setName("EXTRACT");
Vector v = NonSynchronizedVector.newInstance(5);
v.add("DATEPART(");
v.add(",");
v.add(")");
exOperator.printsAs(v);
int[] indices = new int[2];
indices[0] = 1;
indices[1] = 0;
exOperator.setArgumentIndices(indices);
exOperator.bePrefix();
exOperator.setNodeClass(ClassConstants.FunctionExpression_Class);
return exOperator;
}
/**
* INTERNAL:
* Use RTRIM(LTRIM(?)) function for trim.
*/
public static ExpressionOperator trimOperator() {
ExpressionOperator exOperator = new ExpressionOperator();
exOperator.setType(ExpressionOperator.FunctionOperator);
exOperator.setSelector(ExpressionOperator.Trim);
Vector v = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(2);
v.add("RTRIM(LTRIM(");
v.add("))");
exOperator.printsAs(v);
exOperator.bePrefix();
exOperator.setNodeClass(ClassConstants.FunctionExpression_Class);
return exOperator;
}
/**
* INTERNAL:
* Build Trim operator.
*/
public static ExpressionOperator trim2Operator() {
ExpressionOperator exOperator = new ExpressionOperator();
exOperator.setType(ExpressionOperator.FunctionOperator);
exOperator.setSelector(ExpressionOperator.Trim2);
Vector v = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(5);
v.add("STR_REPLACE(");
v.add(", ");
v.add(", NULL)");
exOperator.printsAs(v);
exOperator.setNodeClass(ClassConstants.FunctionExpression_Class);
return exOperator;
}
/**
* INTERNAL:
* Return true if output parameters can be built with result sets.
*/
@Override
public boolean isOutputAllowWithResultSet() {
return false;
}
@Override
public boolean isSybase() {
return true;
}
/**
* Builds a table of maximum numeric values keyed on java class. This is used for type testing but
* might also be useful to end users attempting to sanitize values.
* <p><b>NOTE</b>: BigInteger {@literal &} BigDecimal maximums are dependent upon their precision {@literal &} Scale
*/
@Override
public Hashtable<Class<? extends Number>, Number> maximumNumericValues() {
Hashtable<Class<? extends Number>, Number> values = new Hashtable<>();
values.put(Integer.class, Integer.MAX_VALUE);
values.put(Long.class, Long.MAX_VALUE);
values.put(Double.class, Double.valueOf(Float.MAX_VALUE));
values.put(Short.class, Short.MAX_VALUE);
values.put(Byte.class, Byte.MAX_VALUE);
values.put(Float.class, Float.MAX_VALUE);
values.put(java.math.BigInteger.class, new java.math.BigInteger("99999999999999999999999999999999999999"));
values.put(java.math.BigDecimal.class, new java.math.BigDecimal("9999999999999999999.9999999999999999999"));
return values;
}
/**
* Builds a table of minimum numeric values keyed on java class. This is used for type testing but
* might also be useful to end users attempting to sanitize values.
* <p><b>NOTE</b>: BigInteger {@literal &} BigDecimal minimums are dependent upon their precision {@literal &} Scale
*/
@Override
public Hashtable<Class<? extends Number>, Number> minimumNumericValues() {
Hashtable<Class<? extends Number>, Number> values = new Hashtable<>();
values.put(Integer.class, Integer.MIN_VALUE);
values.put(Long.class, Long.MIN_VALUE);
values.put(Double.class, 1.4012984643247149E-44);// The double values are weird. They lose precision at E-45
values.put(Short.class, Short.MIN_VALUE);
values.put(Byte.class, Byte.MIN_VALUE);
values.put(Float.class, Float.MIN_VALUE);
values.put(java.math.BigInteger.class, new java.math.BigInteger("-99999999999999999999999999999999999999"));
values.put(java.math.BigDecimal.class, new java.math.BigDecimal("-9999999999999999999.9999999999999999999"));
return values;
}
/**
* Override the default MOD operator.
*/
public ExpressionOperator modOperator() {
ExpressionOperator result = new ExpressionOperator();
result.setSelector(ExpressionOperator.Mod);
Vector v = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance();
v.addElement(" % ");
result.printsAs(v);
result.bePostfix();
result.setNodeClass(org.eclipse.persistence.internal.expressions.FunctionExpression.class);
return result;
}
/*
* Create the outer join operator for this platform
*/
protected ExpressionOperator operatorOuterJoin() {
ExpressionOperator result = new ExpressionOperator();
result.setSelector(ExpressionOperator.EqualOuterJoin);
Vector v = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance();
v.addElement(" =* ");
result.printsAs(v);
result.bePostfix();
result.setNodeClass(RelationExpression.class);
return result;
}
/** Append the receiver's field 'identity' constraint clause to a writer.*/
@Override
public void printFieldIdentityClause(Writer writer) throws ValidationException {
try {
writer.write(" IDENTITY");
} catch (IOException ioException) {
throw ValidationException.fileError(ioException);
}
}
/** Append the receiver's field 'NULL' constraint clause to a writer.*/
@Override
public void printFieldNullClause(Writer writer) throws ValidationException {
try {
writer.write(" NULL");
} catch (IOException ioException) {
throw ValidationException.fileError(ioException);
}
}
/**
* This method is used to register output parameter on Callable Statements for Stored Procedures
* as each database seems to have a different method.
*/
@Override
public void registerOutputParameter(CallableStatement statement, int index, int jdbcType) throws SQLException {
statement.registerOutParameter(index, jdbcType, getTypeStrings().get(jdbcType));
}
/**
* USed for sp calls.
*/
@Override
public boolean requiresProcedureCallBrackets() {
return useJDBCStoredProcedureSyntax();
}
/**
* Used for sp calls. Sybase must print output after output params.
*/
@Override
public boolean requiresProcedureCallOuputToken() {
return true;
}
/**
* INTERNAL:
* Indicates whether the version of CallableStatement.registerOutputParameter method
* that takes type name should be used.
*/
@Override
public boolean requiresTypeNameToRegisterOutputParameter() {
return true;
}
/* This is required in the construction of the stored procedures with
* output parameters
*/
@Override
public boolean shouldPrintInOutputTokenBeforeType() {
return false;
}
/* This is required in the construction of the stored procedures with
* output parameters
*/
@Override
public boolean shouldPrintOutputTokenBeforeType() {
return false;
}
/**
* JDBC defines and outer join syntax, many drivers do not support this. So we normally avoid it.
*/
@Override
public boolean shouldUseJDBCOuterJoinSyntax() {
return false;
}
/**
* Override the default SubstringSingleArg operator.
*/
public ExpressionOperator singleArgumentSubstringOperator() {
ExpressionOperator result = new ExpressionOperator();
result.setSelector(ExpressionOperator.SubstringSingleArg);
result.setType(ExpressionOperator.FunctionOperator);
Vector v = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance();
v.addElement("SUBSTRING(");
v.addElement(",");
v.addElement(", CHAR_LENGTH(");
v.addElement("))");
result.printsAs(v);
int[] indices = new int[3];
indices[0] = 0;
indices[1] = 1;
indices[2] = 0;
result.setArgumentIndices(indices);
result.setNodeClass(ClassConstants.FunctionExpression_Class);
result.bePrefix();
return result;
}
/**
* INTERNAL:
* Indicates whether the platform supports identity.
* Sybase does through IDENTITY field types.
* This method is to be used *ONLY* by sequencing classes
*/
@Override
public boolean supportsIdentity() {
return true;
}
/**
* Sybase (as of Sybase ASE 15, does not support delete on cascade).
* Sybase ASA (SQL Anywhere does, so must use different platform).
*/
@Override
public boolean supportsDeleteOnCascade() {
return false;
}
/**
* INTERNAL:
*/
@Override
public boolean supportsGlobalTempTables() {
return true;
}
/**
* INTERNAL:
*/
@Override
protected String getCreateTempTableSqlPrefix() {
return "CREATE TABLE ";
}
/**
* INTERNAL:
*/
@Override
public DatabaseTable getTempTableForTable(DatabaseTable table) {
return new DatabaseTable("#" + table.getName(), table.getTableQualifier(), table.shouldUseDelimiters(), getStartDelimiter(), getEndDelimiter());
}
/**
* INTERNAL:
*/
@Override
public void writeUpdateOriginalFromTempTableSql(Writer writer, DatabaseTable table,
Collection pkFields,
Collection assignedFields) throws IOException
{
writer.write("UPDATE ");
String tableName = table.getQualifiedNameDelimited(this);
writer.write(tableName);
String tempTableName = getTempTableForTable(table).getQualifiedNameDelimited(this);
writeAutoAssignmentSetClause(writer, null, tempTableName, assignedFields, this);
writer.write(" FROM ");
writer.write(tableName);
writer.write(", ");
writer.write(tempTableName);
writeAutoJoinWhereClause(writer, tableName, tempTableName, pkFields, this);
}
}