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An JDBC datasource implementation.
/*
* Copyright 1999-2018 Alibaba Group Holding Ltd.
*
* 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.alibaba.druid.sql.dialect.db2.visitor;
import com.alibaba.druid.sql.ast.statement.SQLCreateTableStatement;
import com.alibaba.druid.sql.ast.statement.SQLSelectQueryBlock;
import com.alibaba.druid.sql.dialect.db2.ast.DB2Object;
import com.alibaba.druid.sql.dialect.db2.ast.stmt.DB2CreateTableStatement;
import com.alibaba.druid.sql.dialect.db2.ast.stmt.DB2SelectQueryBlock;
import com.alibaba.druid.sql.dialect.db2.ast.stmt.DB2ValuesStatement;
import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
import com.alibaba.druid.util.JdbcConstants;
public class DB2SchemaStatVisitor extends SchemaStatVisitor implements DB2ASTVisitor {
public DB2SchemaStatVisitor() {
super (JdbcConstants.DB2);
}
@Override
public boolean visit(DB2SelectQueryBlock x) {
return this.visit((SQLSelectQueryBlock) x);
}
@Override
public void endVisit(DB2SelectQueryBlock x) {
super.endVisit((SQLSelectQueryBlock) x);
}
@Override
public boolean visit(DB2ValuesStatement x) {
return false;
}
@Override
public void endVisit(DB2ValuesStatement x) {
}
@Override
public boolean visit(DB2CreateTableStatement x) {
return visit((SQLCreateTableStatement) x);
}
@Override
public void endVisit(DB2CreateTableStatement x) {
}
protected boolean isPseudoColumn(long hash64) {
return hash64 == DB2Object.Constants.CURRENT_DATE
|| hash64 == DB2Object.Constants.CURRENT_TIME
|| hash64 == DB2Object.Constants.CURRENT_SCHEMA;
}
}