| // Copyright 2015 The Android Open Source Project |
| // |
| // 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.google.gwtorm.schema.sql; |
| |
| import com.google.gwtorm.schema.ColumnModel; |
| import com.google.gwtorm.server.OrmDuplicateKeyException; |
| import com.google.gwtorm.server.OrmException; |
| import com.google.gwtorm.server.StatementExecutor; |
| |
| import java.sql.Connection; |
| import java.sql.PreparedStatement; |
| import java.sql.ResultSet; |
| import java.sql.SQLException; |
| import java.sql.Statement; |
| import java.sql.Types; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** Dialect for DB2 */ |
| public class DialectDB2 extends SqlDialect { |
| |
| public DialectDB2() { |
| typeNames.put(Types.LONGVARCHAR, "CLOB"); |
| } |
| |
| @Override |
| public boolean handles(String url, Connection c) { |
| return url.startsWith("jdbc:db2:"); |
| } |
| |
| @Override |
| public OrmException convertError(String op, String entity, |
| SQLException err) { |
| switch (getSQLStateInt(err)) { |
| case 23505: // DUPLICATE_KEY_1 |
| return new OrmDuplicateKeyException(entity, err); |
| |
| default: |
| return super.convertError(op, entity, err); |
| } |
| } |
| |
| @Override |
| protected String getNextSequenceValueSql(String seqname) { |
| return "VALUES NEXT VALUE FOR " + seqname; |
| } |
| |
| @Override |
| public Set<String> listSequences(Connection db) throws SQLException { |
| Statement s = db.createStatement(); |
| try { |
| ResultSet rs = |
| s.executeQuery("SELECT SEQNAME" |
| + " FROM SYSCAT.SEQUENCES" |
| + " WHERE SEQSCHEMA = CURRENT_SCHEMA"); |
| try { |
| HashSet<String> sequences = new HashSet<>(); |
| while (rs.next()) { |
| sequences.add(rs.getString(1).toLowerCase()); |
| } |
| return sequences; |
| } finally { |
| rs.close(); |
| } |
| } finally { |
| s.close(); |
| } |
| } |
| |
| @Override |
| public Set<String> listTables(Connection db) throws SQLException { |
| Statement s = db.createStatement(); |
| try { |
| ResultSet rs = s.executeQuery("SELECT TABNAME" |
| + " FROM SYSCAT.TABLES" |
| + " WHERE TABSCHEMA = CURRENT_SCHEMA"); |
| try { |
| Set<String> tables = new HashSet<>(); |
| while (rs.next()) { |
| tables.add(rs.getString(1).toLowerCase()); |
| } |
| return tables; |
| } finally { |
| rs.close(); |
| } |
| } finally { |
| s.close(); |
| } |
| } |
| |
| @Override |
| public Set<String> listIndexes(final Connection db, String tableName) |
| throws SQLException { |
| PreparedStatement s = db.prepareStatement("SELECT distinct INDNAME" |
| + " FROM syscat.indexes WHERE TABNAME = ? AND TABSCHEMA = CURRENT_SCHEMA"); |
| try { |
| s.setString(1, tableName.toUpperCase()); |
| ResultSet rs = s.executeQuery(); |
| try { |
| Set<String> indexes = new HashSet<>(); |
| while (rs.next()) { |
| indexes.add(rs.getString(1).toLowerCase()); |
| } |
| return indexes; |
| } finally { |
| rs.close(); |
| } |
| } finally { |
| s.close(); |
| } |
| } |
| |
| @Override |
| public void renameTable(StatementExecutor e, String from, String to) |
| throws OrmException { |
| StringBuilder r = new StringBuilder(); |
| r.append("RENAME TABLE "); |
| r.append(from); |
| r.append(" TO "); |
| r.append(to); |
| e.execute(r.toString()); |
| } |
| |
| @Override |
| public void renameColumn(StatementExecutor stmt, String tableName, |
| String fromColumn, ColumnModel col) throws OrmException { |
| StringBuilder r = new StringBuilder(); |
| r.append("ALTER TABLE "); |
| r.append(tableName); |
| r.append(" RENAME COLUMN "); |
| r.append(fromColumn); |
| r.append(" TO "); |
| r.append(col.getColumnName()); |
| stmt.execute(r.toString()); |
| } |
| |
| @Override |
| public boolean isStatementDelimiterSupported() { |
| return false; |
| } |
| } |