/*
* The contents of this file are subject to the terms
* of the Common Development and Distribution License
* (the "License"). You may not use this file except
* in compliance with the License.
*
* You can obtain a copy of the license at
* glassfish/bootstrap/legal/CDDLv1.0.txt or
* https://glassfish.dev.java.net/public/CDDLv1.0.html.
* See the License for the specific language governing
* permissions and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* HEADER in each file and include the License file at
* glassfish/bootstrap/legal/CDDLv1.0.txt. If applicable,
* add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your
* own identifying information: Portions Copyright [yyyy]
* [name of copyright owner]
*/
// Copyright (c) 1998, 2005, Oracle. All rights reserved.
package oracle.toplink.essentials.platform.database;
import java.io.*;
import java.util.*;
import oracle.toplink.essentials.exceptions.ValidationException;
import oracle.toplink.essentials.expressions.ExpressionOperator;
import oracle.toplink.essentials.descriptors.ClassDescriptor;
import oracle.toplink.essentials.internal.databaseaccess.FieldTypeDefinition;
import oracle.toplink.essentials.internal.expressions.FunctionExpression;
import oracle.toplink.essentials.internal.expressions.RelationExpression;
import oracle.toplink.essentials.internal.sessions.AbstractSession;
import oracle.toplink.essentials.internal.helper.*;
import oracle.toplink.essentials.queryframework.ValueReadQuery;
import oracle.toplink.essentials.tools.schemaframework.FieldDefinition;
/**
*
Purpose: Provides PostgreSQL specific behaviour.
*
Responsibilities:
* - Native SQL for Date, Time, & Timestamp.
*
- Native sequencing.
*
- Mapping of class types to database types for the schema framework.
*
- Pessimistic locking.
*
- Platform specific operators.
*
*
* @since OracleAS TopLink 10g (10.1.3)
*/
public class PostgreSQLPlatform extends DatabasePlatform {
/**
* INTERNAL:
* TODO: Need to find out how can byte arrays be inlined in Derby
*/
protected void appendByteArray(byte[] bytes, Writer writer) throws IOException {
super.appendByteArray(bytes, writer);
}
/**
* INTERNAL:
* Initialize any platform-specific operators
*/
protected void initializePlatformOperators() {
super.initializePlatformOperators();
addOperator(ExpressionOperator.simpleLogicalNoParens(ExpressionOperator.Concat, "||"));
addOperator(ExpressionOperator.simpleTwoArgumentFunction(ExpressionOperator.Nvl, "NULLIF"));
addOperator(operatorLocate());
}
/**
* INTERNAL:
* This method returns the query to select the timestamp from the server
* for Derby.
*/
public ValueReadQuery getTimestampQuery() {
if (timestampQuery == null) {
timestampQuery = new ValueReadQuery();
timestampQuery.setSQLString("SELECT NOW()");
}
return timestampQuery;
}
/**
* This method is used to print the output parameter token when stored
* procedures are called
*/
public String getInOutputProcedureToken() {
return "OUT";
}
/**
* This is required in the construction of the stored procedures with
* output parameters
*/
public boolean shouldPrintOutputTokenAtStart() {
//TODO: Check with the reviewer where this is used
return false;
}
/**
* INTERNAL:
* Answers whether platform is Derby
*/
public boolean isPostgreSQL() {
return true;
}
/**
* INTERNAL:
*/
protected String getCreateTempTableSqlSuffix() {
// http://pgsqld.active-venture.com/sql-createtable.html
return " ON COMMIT PRESERVE ROWS";
}
public boolean supportsNativeSequenceNumbers() {
return true;
}
/**
* INTERNAL:
* Indicates whether NativeSequence should retrieve
* sequence value after the object has been inserted into the db
* This method is to be used *ONLY* by sequencing classes
*/
public boolean shouldNativeSequenceAcquireValueAfterInsert() {
return true;
}
/**
* INTERNAL:
* Build the identity query for native sequencing.
*/
public ValueReadQuery buildSelectQueryForNativeSequence(String seqName, Integer size) {
ValueReadQuery selectQuery = new ValueReadQuery();
selectQuery.setSQLString("select currval(current_schema()" + "|| \'." + seqName + "\')");
// selectQuery.setSQLString("select currval(current_schema()" + "||" + "\'.CMP3_ADDRESS_ADDRESS_ID_SEQ\')");
return selectQuery;
}
/**
* INTERNAL:
*/
protected String getCreateTempTableSqlBodyForTable(DatabaseTable table) {
// returning null includes fields of the table in body
// see javadoc of DatabasePlatform#getCreateTempTableSqlBodyForTable(DataBaseTable)
// for details
return null;
}
/**
* INTERNAL:
* Append the receiver's field 'identity' constraint clause to a writer
*/
public void printFieldIdentityClause(Writer writer) throws ValidationException {
try {
writer.write(" SERIAL");
} catch (IOException ioException) {
throw ValidationException.fileError(ioException);
}
}
protected Hashtable buildFieldTypes() {
Hashtable fieldTypeMapping = new Hashtable();
fieldTypeMapping.put(Boolean.class, new FieldTypeDefinition("SMALLINT DEFAULT 0", false));
fieldTypeMapping.put(Integer.class, new FieldTypeDefinition("INTEGER", false));
fieldTypeMapping.put(Long.class, new FieldTypeDefinition("INTEGER", false));
fieldTypeMapping.put(Float.class, new FieldTypeDefinition("FLOAT", false));
fieldTypeMapping.put(Double.class, new FieldTypeDefinition("FLOAT", 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("BIGINT", false));
fieldTypeMapping.put(java.math.BigDecimal.class, new FieldTypeDefinition("DECIMAL", 15));
fieldTypeMapping.put(Number.class, new FieldTypeDefinition("DECIMAL", 15));
fieldTypeMapping.put(String.class, new FieldTypeDefinition("VARCHAR", 255));
fieldTypeMapping.put(Character.class, new FieldTypeDefinition("CHAR", 1));
fieldTypeMapping.put(Byte[].class, new FieldTypeDefinition("BYTEA"));
fieldTypeMapping.put(Character[].class, new FieldTypeDefinition("TEXT"));
fieldTypeMapping.put(java.sql.Date.class, new FieldTypeDefinition("DATE", false));
fieldTypeMapping.put(java.sql.Time.class, new FieldTypeDefinition("TIME", false));
fieldTypeMapping.put(java.sql.Timestamp.class, new FieldTypeDefinition("TIMESTAMP", false));
return fieldTypeMapping;
}
/**
* INTERNAL:
* Override the default locate operator
*/
protected ExpressionOperator operatorLocate() {
ExpressionOperator result = new ExpressionOperator();
result.setSelector(ExpressionOperator.Locate);
Vector v = new Vector(3);
v.addElement("STRPOS(");
v.addElement(", ");
v.addElement(")");
result.printsAs(v);
result.bePrefix();
result.setNodeClass(RelationExpression.class);
return result;
}
/**
* INTERNAL:
*/
public boolean supportsGlobalTempTables() {
return true;
}
/**
* INTERNAL:
*/
protected String getCreateTempTableSqlPrefix() {
return "CREATE GLOBAL TEMPORARY TABLE ";
}
/**
* INTERNAL:
* returns the maximum number of characters that can be used in a field
* name on this platform.
*/
public int getMaxFieldNameSize() {
// The system uses no more than NAMEDATALEN-1 characters of an identifier; longer names can be written in commands,
// but they will be truncated. By default, NAMEDATALEN is 64 so the maximum identifier length is 63 (but at the time PostgreSQL
// is built, NAMEDATALEN can be changed in src/include/postgres_ext.h).
// http://www.postgresql.org/docs/7.3/interactive/sql-syntax.html#SQL-SYNTAX-IDENTIFIERS
return 63;
}
// http://www.postgresql.org/docs/8.1/interactive/plpgsql-declarations.html
/**
* INTERNAL:
* Used for sp calls.
*/
public String getProcedureBeginString() {
return "AS $$ BEGIN ";
}
/**
* INTERNAL:
* Used for sp calls.
*/
public String getProcedureEndString() {
return "; END ; $$ LANGUAGE plpgsql;";
}
/**
* INTERNAL:
* Used for sp calls.
*/
public String getProcedureCallHeader() {
return "EXECUTE ";
}
/**
* INTERNAL
* Used for stored function calls.
*/
public String getAssignmentString() {
return ":= ";
}
public void printFieldTypeSize(Writer writer, FieldDefinition field,
FieldTypeDefinition fieldType, AbstractSession session, String qualifiedFieldName) throws IOException {
if(!isShouldAcquireSequenceValueAfterInsert(session, qualifiedFieldName)) {
writer.write(fieldType.getName());
if ((fieldType.isSizeAllowed()) && ((field.getSize() != 0) || (fieldType.isSizeRequired()))) {
writer.write("(");
if (field.getSize() == 0) {
writer.write(new Integer(fieldType.getDefaultSize()).toString());
} else {
writer.write(new Integer(field.getSize()).toString());
}
if (field.getSubSize() != 0) {
writer.write(",");
writer.write(new Integer(field.getSubSize()).toString());
} else if (fieldType.getDefaultSubSize() != 0) {
writer.write(",");
writer.write(new Integer(fieldType.getDefaultSubSize()).toString());
}
writer.write(")");
}
}
}
public void printFieldUnique(Writer writer, boolean isUnique,
AbstractSession session, String qualifiedFieldName) throws IOException {
if(!isShouldAcquireSequenceValueAfterInsert(session, qualifiedFieldName)) {
if (isUnique) {
if (supportsPrimaryKeyConstraint()) {
writer.write(" UNIQUE");
}
}
}
}
}