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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.util.StatementBuilder;
/**
* MySQL database dialect.
*/
public class SQLDialectMySQL extends SQLDialectDefault {
@Override
public String convertSqlType(String sqlType) {
if (sqlType.equals("CLOB")) {
return "TEXT";
}
return sqlType;
}
@Override
protected <T> String prepareCreateTable(TableDefinition<T> def) {
return "CREATE TABLE IF NOT EXISTS";
}
@Override
public <T> void prepareDropView(SQLStatement stat, TableDefinition<T> def) {
StatementBuilder buff = new StatementBuilder("DROP VIEW IF EXISTS "
+ prepareTableName(def.schemaName, def.tableName));
stat.setSQL(buff.toString());
return;
}
@Override
public String prepareColumnName(String name) {
return "`" + name + "`";
}
@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(" AUTO_INCREMENT");
}
return false;
}
@Override
public <T> void prepareMerge(SQLStatement stat, String schemaName, String tableName,
TableDefinition<T> def, Object obj) {
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);
stat.addParameter(value);
}
buff.append(") ON DUPLICATE KEY UPDATE ");
buff.resetCount();
for (FieldDefinition field : def.fields) {
buff.appendExceptFirst(", ");
buff.append(field.columnName);
buff.append("=VALUES(");
buff.append(field.columnName);
buff.append(')');
}
stat.setSQL(buff.toString());
}
}
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