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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.util.StatementBuilder;
-
- /**
- * Derby database dialect.
- */
- public class SQLDialectDerby extends SQLDialectDefault {
-
- @Override
- public Class<? extends java.util.Date> getDateTimeClass() {
- return java.sql.Timestamp.class;
- }
-
- @Override
- public String convertSqlType(String sqlType) {
- if ("TINYINT".equals(sqlType)) {
- // Derby does not have a TINYINT/BYTE type
- return "SMALLINT";
- }
- return sqlType;
- }
-
- @Override
- public void appendLimitOffset(SQLStatement stat, long limit, long offset) {
- // FETCH/OFFSET added in 10.5
- if (databaseMajorVersion >= 10 && databaseMinorVersion >= 5) {
- if (offset > 0) {
- stat.appendSQL(" OFFSET " + offset + (offset == 1 ? " ROW" : " ROWS"));
- }
- if (limit > 0) {
- stat.appendSQL(" FETCH NEXT " + limit + (limit == 1 ? " ROW" : " ROWS") + " ONLY");
- }
- }
- }
-
- @Override
- protected boolean prepareColumnDefinition(StatementBuilder buff, String dataType,
- boolean isAutoIncrement, boolean isPrimaryKey) {
- String convertedType = convertSqlType(dataType);
- buff.append(convertedType);
- if (isIntegerType(dataType) && isAutoIncrement) {
- buff.append(" GENERATED BY DEFAULT AS IDENTITY");
- }
- return false;
- }
-
- @Override
- public <T> void prepareDropTable(SQLStatement stat, TableDefinition<T> def) {
- StatementBuilder buff = new StatementBuilder("DROP TABLE "
- + prepareTableName(def.schemaName, def.tableName));
- stat.setSQL(buff.toString());
- return;
- }
- }
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