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/*
* Copyright 2011 James Moger.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.iciql;
import com.iciql.TableDefinition.FieldDefinition;
import com.iciql.TableDefinition.IndexDefinition;
import com.iciql.util.StatementBuilder;
/**
* PostgreSQL database dialect.
*/
public class SQLDialectPostgreSQL extends SQLDialectDefault {
@Override
public Class<? extends java.util.Date> getDateTimeClass() {
return java.sql.Timestamp.class;
}
@Override
public String convertSqlType(String sqlType) {
if ("DOUBLE".equals(sqlType)) {
return "DOUBLE PRECISION";
} else if ("TINYINT".equals(sqlType)) {
// PostgreSQL does not have a byte type
return "SMALLINT";
} else if ("CLOB".equals(sqlType)) {
return "TEXT";
} else if ("BLOB".equals(sqlType)) {
return "BYTEA";
}
return sqlType;
}
@Override
protected boolean prepareColumnDefinition(StatementBuilder buff, String dataType,
boolean isAutoIncrement, boolean isPrimaryKey) {
String convertedType = convertSqlType(dataType);
if (isIntegerType(dataType)) {
if (isAutoIncrement) {
if ("BIGINT".equals(dataType)) {
buff.append("BIGSERIAL");
} else {
buff.append("SERIAL");
}
} else {
buff.append(convertedType);
}
} else {
buff.append(convertedType);
}
return false;
}
@Override
public void prepareCreateIndex(SQLStatement stat, String schemaName, String tableName,
IndexDefinition index) {
StatementBuilder buff = new StatementBuilder();
buff.append("CREATE ");
switch (index.type) {
case UNIQUE:
buff.append("UNIQUE ");
break;
case UNIQUE_HASH:
buff.append("UNIQUE ");
break;
}
buff.append("INDEX ");
buff.append(index.indexName);
buff.append(" ON ");
buff.append(tableName);
switch (index.type) {
case HASH:
buff.append(" USING HASH");
break;
case UNIQUE_HASH:
buff.append(" USING HASH");
break;
}
buff.append(" (");
for (String col : index.columnNames) {
buff.appendExceptFirst(", ");
buff.append(prepareColumnName(col));
}
buff.append(") ");
stat.setSQL(buff.toString().trim());
}
@Override
public <T> void prepareMerge(SQLStatement stat, String schemaName, String tableName,
TableDefinition<T> def, Object obj) {
if (databaseVersion < 9.5f) {
// simulated UPSERT for <= 9.4 release
super.prepareMerge(stat, schemaName, tableName, def, obj);
return;
}
// official UPSERT added in 9.5 release
StatementBuilder buff = new StatementBuilder("INSERT INTO ");
buff.append(prepareTableName(schemaName, tableName)).append(" (");
buff.resetCount();
for (FieldDefinition field : def.fields) {
buff.appendExceptFirst(", ");
buff.append(field.columnName);
}
buff.resetCount();
buff.append(") VALUES (");
for (FieldDefinition field : def.fields) {
buff.appendExceptFirst(", ");
buff.append('?');
Object value = def.getValue(obj, field);
Object parameter = serialize(value, field.typeAdapter);
stat.addParameter(parameter);
}
buff.append(") ON CONFLICT DO UPDATE SET");
stat.setSQL(buff.toString());
}
}
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