package liquibase.database.core;
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import java.lang.reflect.Method;
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import java.sql.Connection;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.sql.Statement;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Locale;
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import java.util.Map;
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import java.util.Properties;
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import java.util.Set;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import liquibase.CatalogAndSchema;
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import liquibase.Scope;
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import liquibase.database.AbstractJdbcDatabase;
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import liquibase.database.DatabaseConnection;
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import liquibase.database.OfflineConnection;
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import liquibase.database.jvm.JdbcConnection;
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import liquibase.exception.DatabaseException;
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import liquibase.exception.UnexpectedLiquibaseException;
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import liquibase.exception.ValidationErrors;
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import liquibase.executor.ExecutorService;
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import liquibase.statement.DatabaseFunction;
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import liquibase.statement.SequenceCurrentValueFunction;
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import liquibase.statement.SequenceNextValueFunction;
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import liquibase.statement.core.RawCallStatement;
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import liquibase.statement.core.RawSqlStatement;
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import liquibase.structure.DatabaseObject;
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import liquibase.structure.core.Catalog;
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import liquibase.structure.core.Index;
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import liquibase.structure.core.PrimaryKey;
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import liquibase.structure.core.Schema;
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import liquibase.util.JdbcUtils;
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import liquibase.util.StringUtil;
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public class DmDatabase extends AbstractJdbcDatabase {
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private static final String PRODUCT_NAME = "DM DBMS";
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@Override
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protected String getDefaultDatabaseProductName() {
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return PRODUCT_NAME;
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}
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/**
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* Is this AbstractDatabase subclass the correct one to use for the given connection.
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*
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* @param conn
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*/
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@Override
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public boolean isCorrectDatabaseImplementation(DatabaseConnection conn) throws DatabaseException {
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return PRODUCT_NAME.equalsIgnoreCase(conn.getDatabaseProductName());
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}
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/**
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* If this database understands the given url, return the default driver class name. Otherwise return null.
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*
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* @param url
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*/
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@Override
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public String getDefaultDriver(String url) {
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if(url.startsWith("jdbc:dm")) {
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return "dm.jdbc.driver.DmDriver";
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}
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return null;
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}
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/**
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* Returns an all-lower-case short name of the product. Used for end-user selecting of database type
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* such as the DBMS precondition.
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*/
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@Override
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public String getShortName() {
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return "dm";
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}
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@Override
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public Integer getDefaultPort() {
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return 5236;
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}
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/**
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* Returns whether this database support initially deferrable columns.
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*/
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@Override
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public boolean supportsInitiallyDeferrableColumns() {
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return true;
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}
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@Override
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public boolean supportsTablespaces() {
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return true;
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}
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@Override
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public int getPriority() {
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return PRIORITY_DEFAULT;
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}
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private static final Pattern PROXY_USER = Pattern.compile(".*(?:thin|oci)\\:(.+)/@.*");
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protected final int SHORT_IDENTIFIERS_LENGTH = 30;
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protected final int LONG_IDENTIFIERS_LEGNTH = 128;
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public static final int ORACLE_12C_MAJOR_VERSION = 12;
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private Set<String> reservedWords = new HashSet<>();
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private Set<String> userDefinedTypes;
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private Map<String, String> savedSessionNlsSettings;
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private Boolean canAccessDbaRecycleBin;
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private Integer databaseMajorVersion;
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private Integer databaseMinorVersion;
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/**
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* Default constructor for an object that represents the Oracle Database DBMS.
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*/
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public DmDatabase() {
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super.unquotedObjectsAreUppercased = true;
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//noinspection HardCodedStringLiteral
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super.setCurrentDateTimeFunction("SYSTIMESTAMP");
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// Setting list of Oracle's native functions
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//noinspection HardCodedStringLiteral
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dateFunctions.add(new DatabaseFunction("SYSDATE"));
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//noinspection HardCodedStringLiteral
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dateFunctions.add(new DatabaseFunction("SYSTIMESTAMP"));
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//noinspection HardCodedStringLiteral
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dateFunctions.add(new DatabaseFunction("CURRENT_TIMESTAMP"));
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//noinspection HardCodedStringLiteral
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super.sequenceNextValueFunction = "%s.nextval";
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//noinspection HardCodedStringLiteral
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super.sequenceCurrentValueFunction = "%s.currval";
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}
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private void tryProxySession(final String url, final Connection con) {
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Matcher m = PROXY_USER.matcher(url);
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if (m.matches()) {
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Properties props = new Properties();
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props.put("PROXY_USER_NAME", m.group(1));
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try {
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Method method = con.getClass().getMethod("openProxySession", int.class, Properties.class);
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method.setAccessible(true);
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method.invoke(con, 1, props);
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} catch (Exception e) {
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Scope.getCurrentScope().getLog(getClass()).info("Could not open proxy session on OracleDatabase: " + e.getCause().getMessage());
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}
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}
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}
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@Override
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public int getDatabaseMajorVersion() throws DatabaseException {
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if (databaseMajorVersion == null) {
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return super.getDatabaseMajorVersion();
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} else {
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return databaseMajorVersion;
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}
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}
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@Override
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public int getDatabaseMinorVersion() throws DatabaseException {
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if (databaseMinorVersion == null) {
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return super.getDatabaseMinorVersion();
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} else {
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return databaseMinorVersion;
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}
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}
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@Override
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public String getJdbcCatalogName(CatalogAndSchema schema) {
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return null;
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}
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@Override
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public String getJdbcSchemaName(CatalogAndSchema schema) {
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return correctObjectName((schema.getCatalogName() == null) ? schema.getSchemaName() : schema.getCatalogName(), Schema.class);
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}
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@Override
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protected String getAutoIncrementClause(final String generationType, final Boolean defaultOnNull) {
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if (StringUtil.isEmpty(generationType)) {
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return super.getAutoIncrementClause();
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}
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String autoIncrementClause = "GENERATED %s AS IDENTITY"; // %s -- [ ALWAYS | BY DEFAULT [ ON NULL ] ]
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String generationStrategy = generationType;
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if (Boolean.TRUE.equals(defaultOnNull) && generationType.toUpperCase().equals("BY DEFAULT")) {
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generationStrategy += " ON NULL";
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}
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return String.format(autoIncrementClause, generationStrategy);
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}
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@Override
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public String generatePrimaryKeyName(String tableName) {
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if (tableName.length() > 27) {
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//noinspection HardCodedStringLiteral
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return "PK_" + tableName.toUpperCase(Locale.US).substring(0, 27);
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} else {
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//noinspection HardCodedStringLiteral
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return "PK_" + tableName.toUpperCase(Locale.US);
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}
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}
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@Override
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public boolean isReservedWord(String objectName) {
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return reservedWords.contains(objectName.toUpperCase());
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}
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@Override
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public boolean supportsSequences() {
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return true;
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}
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/**
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* Oracle supports catalogs in liquibase terms
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*
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* @return false
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*/
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@Override
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public boolean supportsSchemas() {
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return false;
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}
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@Override
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protected String getConnectionCatalogName() throws DatabaseException {
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if (getConnection() instanceof OfflineConnection) {
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return getConnection().getCatalog();
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}
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try {
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//noinspection HardCodedStringLiteral
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return Scope.getCurrentScope().getSingleton(ExecutorService.class).getExecutor("jdbc", this).queryForObject(new RawCallStatement("select sys_context( 'userenv', 'current_schema' ) from dual"), String.class);
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} catch (Exception e) {
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//noinspection HardCodedStringLiteral
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Scope.getCurrentScope().getLog(getClass()).info("Error getting default schema", e);
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}
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return null;
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}
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@Override
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public String getDefaultCatalogName() {//NOPMD
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return (super.getDefaultCatalogName() == null) ? null : super.getDefaultCatalogName().toUpperCase(Locale.US);
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}
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/**
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* <p>Returns an Oracle date literal with the same value as a string formatted using ISO 8601.</p>
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*
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* <p>Convert an ISO8601 date string to one of the following results:
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* to_date('1995-05-23', 'YYYY-MM-DD')
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* to_date('1995-05-23 09:23:59', 'YYYY-MM-DD HH24:MI:SS')</p>
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* <p>
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* Implementation restriction:<br>
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* Currently, only the following subsets of ISO8601 are supported:<br>
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* <ul>
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* <li>YYYY-MM-DD</li>
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* <li>YYYY-MM-DDThh:mm:ss</li>
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* </ul>
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*/
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@Override
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public String getDateLiteral(String isoDate) {
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String normalLiteral = super.getDateLiteral(isoDate);
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if (isDateOnly(isoDate)) {
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return "TO_DATE(" + normalLiteral + ", 'YYYY-MM-DD')";
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} else if (isTimeOnly(isoDate)) {
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return "TO_DATE(" + normalLiteral + ", 'HH24:MI:SS')";
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} else if (isTimestamp(isoDate)) {
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return "TO_TIMESTAMP(" + normalLiteral + ", 'YYYY-MM-DD HH24:MI:SS.FF')";
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} else if (isDateTime(isoDate)) {
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int seppos = normalLiteral.lastIndexOf('.');
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if (seppos != -1) {
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normalLiteral = normalLiteral.substring(0, seppos) + "'";
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}
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return "TO_DATE(" + normalLiteral + ", 'YYYY-MM-DD HH24:MI:SS')";
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}
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return "UNSUPPORTED:" + isoDate;
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}
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@Override
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public boolean isSystemObject(DatabaseObject example) {
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if (example == null) {
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return false;
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}
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if (this.isLiquibaseObject(example)) {
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return false;
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}
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if (example instanceof Schema) {
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//noinspection HardCodedStringLiteral,HardCodedStringLiteral,HardCodedStringLiteral,HardCodedStringLiteral
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if ("SYSTEM".equals(example.getName()) || "SYS".equals(example.getName()) || "CTXSYS".equals(example.getName()) || "XDB".equals(example.getName())) {
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return true;
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}
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//noinspection HardCodedStringLiteral,HardCodedStringLiteral,HardCodedStringLiteral,HardCodedStringLiteral
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if ("SYSTEM".equals(example.getSchema().getCatalogName()) || "SYS".equals(example.getSchema().getCatalogName()) || "CTXSYS".equals(example.getSchema().getCatalogName()) || "XDB".equals(example.getSchema().getCatalogName())) {
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return true;
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}
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} else if (isSystemObject(example.getSchema())) {
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return true;
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}
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if (example instanceof Catalog) {
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//noinspection HardCodedStringLiteral,HardCodedStringLiteral,HardCodedStringLiteral,HardCodedStringLiteral
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if (("SYSTEM".equals(example.getName()) || "SYS".equals(example.getName()) || "CTXSYS".equals(example.getName()) || "XDB".equals(example.getName()))) {
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return true;
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}
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} else if (example.getName() != null) {
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//noinspection HardCodedStringLiteral
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if (example.getName().startsWith("BIN$")) { //oracle deleted table
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boolean filteredInOriginalQuery = this.canAccessDbaRecycleBin();
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if (!filteredInOriginalQuery) {
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filteredInOriginalQuery = StringUtil.trimToEmpty(example.getSchema().getName()).equalsIgnoreCase(this.getConnection().getConnectionUserName());
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}
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if (filteredInOriginalQuery) {
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return !((example instanceof PrimaryKey) || (example instanceof Index) || (example instanceof
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liquibase.statement.UniqueConstraint));
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} else {
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return true;
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}
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} else //noinspection HardCodedStringLiteral
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if (example.getName().startsWith("AQ$")) { //oracle AQ tables
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return true;
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} else //noinspection HardCodedStringLiteral
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if (example.getName().startsWith("DR$")) { //oracle index tables
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return true;
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} else //noinspection HardCodedStringLiteral
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if (example.getName().startsWith("SYS_IOT_OVER")) { //oracle system table
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return true;
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} else //noinspection HardCodedStringLiteral,HardCodedStringLiteral
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if ((example.getName().startsWith("MDRT_") || example.getName().startsWith("MDRS_")) && example.getName().endsWith("$")) {
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// CORE-1768 - Oracle creates these for spatial indices and will remove them when the index is removed.
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return true;
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} else //noinspection HardCodedStringLiteral
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if (example.getName().startsWith("MLOG$_")) { //Created by materliaized view logs for every table that is part of a materialized view. Not available for DDL operations.
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return true;
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} else //noinspection HardCodedStringLiteral
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if (example.getName().startsWith("RUPD$_")) { //Created by materialized view log tables using primary keys. Not available for DDL operations.
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return true;
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} else //noinspection HardCodedStringLiteral
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if (example.getName().startsWith("WM$_")) { //Workspace Manager backup tables.
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return true;
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} else //noinspection HardCodedStringLiteral
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if ("CREATE$JAVA$LOB$TABLE".equals(example.getName())) { //This table contains the name of the Java object, the date it was loaded, and has a BLOB column to store the Java object.
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return true;
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} else //noinspection HardCodedStringLiteral
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if ("JAVA$CLASS$MD5$TABLE".equals(example.getName())) { //This is a hash table that tracks the loading of Java objects into a schema.
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return true;
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} else //noinspection HardCodedStringLiteral
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if (example.getName().startsWith("ISEQ$$_")) { //System-generated sequence
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return true;
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} else //noinspection HardCodedStringLiteral
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if (example.getName().startsWith("USLOG$")) { //for update materialized view
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return true;
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} else if (example.getName().startsWith("SYS_FBA")) { //for Flashback tables
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return true;
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}
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}
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return super.isSystemObject(example);
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}
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@Override
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public boolean supportsAutoIncrement() {
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// Oracle supports Identity beginning with version 12c
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boolean isAutoIncrementSupported = false;
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try {
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if (getDatabaseMajorVersion() >= 12) {
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isAutoIncrementSupported = true;
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}
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// Returning true will generate create table command with 'IDENTITY' clause, example:
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// CREATE TABLE AutoIncTest (IDPrimaryKey NUMBER(19) GENERATED BY DEFAULT AS IDENTITY NOT NULL, TypeID NUMBER(3) NOT NULL, Description NVARCHAR2(50), CONSTRAINT PK_AutoIncTest PRIMARY KEY (IDPrimaryKey));
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// While returning false will continue to generate create table command without 'IDENTITY' clause, example:
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// CREATE TABLE AutoIncTest (IDPrimaryKey NUMBER(19) NOT NULL, TypeID NUMBER(3) NOT NULL, Description NVARCHAR2(50), CONSTRAINT PK_AutoIncTest PRIMARY KEY (IDPrimaryKey));
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} catch (DatabaseException ex) {
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isAutoIncrementSupported = false;
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}
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return isAutoIncrementSupported;
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}
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// public Set<UniqueConstraint> findUniqueConstraints(String schema) throws DatabaseException {
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// Set<UniqueConstraint> returnSet = new HashSet<UniqueConstraint>();
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//
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// List<Map> maps = new Executor(this).queryForList(new RawSqlStatement("SELECT UC.CONSTRAINT_NAME, UCC.TABLE_NAME, UCC.COLUMN_NAME FROM USER_CONSTRAINTS UC, USER_CONS_COLUMNS UCC WHERE UC.CONSTRAINT_NAME=UCC.CONSTRAINT_NAME AND CONSTRAINT_TYPE='U' ORDER BY UC.CONSTRAINT_NAME"));
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//
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// UniqueConstraint constraint = null;
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// for (Map map : maps) {
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// if (constraint == null || !constraint.getName().equals(constraint.getName())) {
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// returnSet.add(constraint);
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// Table table = new Table((String) map.get("TABLE_NAME"));
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// constraint = new UniqueConstraint(map.get("CONSTRAINT_NAME").toString(), table);
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// }
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// }
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// if (constraint != null) {
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// returnSet.add(constraint);
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// }
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//
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// return returnSet;
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// }
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@Override
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public boolean supportsRestrictForeignKeys() {
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return false;
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}
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@Override
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public int getDataTypeMaxParameters(String dataTypeName) {
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//noinspection HardCodedStringLiteral
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if ("BINARY_FLOAT".equals(dataTypeName.toUpperCase())) {
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return 0;
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}
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//noinspection HardCodedStringLiteral
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if ("BINARY_DOUBLE".equals(dataTypeName.toUpperCase())) {
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return 0;
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}
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return super.getDataTypeMaxParameters(dataTypeName);
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}
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public String getSystemTableWhereClause(String tableNameColumn) {
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List<String> clauses = new ArrayList<String>(Arrays.asList("BIN$",
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"AQ$",
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"DR$",
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"SYS_IOT_OVER",
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"MLOG$_",
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"RUPD$_",
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"WM$_",
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"ISEQ$$_",
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"USLOG$",
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"SYS_FBA"));
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for (int i = 0;i<clauses.size(); i++) {
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clauses.set(i, tableNameColumn+" NOT LIKE '"+clauses.get(i)+"%'");
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}
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return "("+ StringUtil.join(clauses, " AND ") + ")";
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}
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@Override
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public boolean jdbcCallsCatalogsSchemas() {
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return true;
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}
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public Set<String> getUserDefinedTypes() {
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if (userDefinedTypes == null) {
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userDefinedTypes = new HashSet<>();
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if ((getConnection() != null) && !(getConnection() instanceof OfflineConnection)) {
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try {
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try {
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//noinspection HardCodedStringLiteral
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userDefinedTypes.addAll(Scope.getCurrentScope().getSingleton(ExecutorService.class).getExecutor("jdbc", this).queryForList(new RawSqlStatement("SELECT DISTINCT TYPE_NAME FROM ALL_TYPES"), String.class));
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} catch (DatabaseException e) { //fall back to USER_TYPES if the user cannot see ALL_TYPES
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//noinspection HardCodedStringLiteral
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userDefinedTypes.addAll(Scope.getCurrentScope().getSingleton(ExecutorService.class).getExecutor("jdbc", this).queryForList(new RawSqlStatement("SELECT TYPE_NAME FROM USER_TYPES"), String.class));
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}
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} catch (DatabaseException e) {
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//ignore error
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}
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}
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}
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return userDefinedTypes;
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}
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@Override
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public String generateDatabaseFunctionValue(DatabaseFunction databaseFunction) {
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//noinspection HardCodedStringLiteral
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if ((databaseFunction != null) && "current_timestamp".equalsIgnoreCase(databaseFunction.toString())) {
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return databaseFunction.toString();
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}
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if ((databaseFunction instanceof SequenceNextValueFunction) || (databaseFunction instanceof
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SequenceCurrentValueFunction)) {
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String quotedSeq = super.generateDatabaseFunctionValue(databaseFunction);
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// replace "myschema.my_seq".nextval with "myschema"."my_seq".nextval
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return quotedSeq.replaceFirst("\"([^\\.\"]+)\\.([^\\.\"]+)\"", "\"$1\".\"$2\"");
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}
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return super.generateDatabaseFunctionValue(databaseFunction);
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}
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@Override
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public ValidationErrors validate() {
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ValidationErrors errors = super.validate();
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DatabaseConnection connection = getConnection();
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if ((connection == null) || (connection instanceof OfflineConnection)) {
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//noinspection HardCodedStringLiteral
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Scope.getCurrentScope().getLog(getClass()).info("Cannot validate offline database");
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return errors;
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}
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if (!canAccessDbaRecycleBin()) {
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errors.addWarning(getDbaRecycleBinWarning());
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}
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return errors;
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|
}
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public String getDbaRecycleBinWarning() {
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//noinspection HardCodedStringLiteral,HardCodedStringLiteral,HardCodedStringLiteral,HardCodedStringLiteral,
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// HardCodedStringLiteral
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//noinspection HardCodedStringLiteral,HardCodedStringLiteral,HardCodedStringLiteral
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return "Liquibase needs to access the DBA_RECYCLEBIN table so we can automatically handle the case where " +
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"constraints are deleted and restored. Since Oracle doesn't properly restore the original table names " +
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"referenced in the constraint, we use the information from the DBA_RECYCLEBIN to automatically correct this" +
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" issue.\n" +
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"\n" +
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"The user you used to connect to the database (" + getConnection().getConnectionUserName() +
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") needs to have \"SELECT ON SYS.DBA_RECYCLEBIN\" permissions set before we can perform this operation. " +
|
"Please run the following SQL to set the appropriate permissions, and try running the command again.\n" +
|
"\n" +
|
" GRANT SELECT ON SYS.DBA_RECYCLEBIN TO " + getConnection().getConnectionUserName() + ";";
|
}
|
|
public boolean canAccessDbaRecycleBin() {
|
if (canAccessDbaRecycleBin == null) {
|
DatabaseConnection connection = getConnection();
|
if ((connection == null) || (connection instanceof OfflineConnection)) {
|
return false;
|
}
|
|
Statement statement = null;
|
try {
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statement = ((JdbcConnection) connection).createStatement();
|
@SuppressWarnings("HardCodedStringLiteral") ResultSet resultSet = statement.executeQuery("select 1 from dba_recyclebin where 0=1");
|
resultSet.close(); //don't need to do anything with the result set, just make sure statement ran.
|
this.canAccessDbaRecycleBin = true;
|
} catch (Exception e) {
|
//noinspection HardCodedStringLiteral
|
if ((e instanceof SQLException) && e.getMessage().startsWith("ORA-00942")) { //ORA-00942: table or view does not exist
|
this.canAccessDbaRecycleBin = false;
|
} else {
|
//noinspection HardCodedStringLiteral
|
Scope.getCurrentScope().getLog(getClass()).warning("Cannot check dba_recyclebin access", e);
|
this.canAccessDbaRecycleBin = false;
|
}
|
} finally {
|
JdbcUtils.close(null, statement);
|
}
|
}
|
|
return canAccessDbaRecycleBin;
|
}
|
|
@Override
|
public boolean supportsNotNullConstraintNames() {
|
return true;
|
}
|
|
/**
|
* Tests if the given String would be a valid identifier in Oracle DBMS. In Oracle, a valid identifier has
|
* the following form (case-insensitive comparison):
|
* 1st character: A-Z
|
* 2..n characters: A-Z0-9$_#
|
* The maximum length of an identifier differs by Oracle version and object type.
|
*/
|
public boolean isValidOracleIdentifier(String identifier, Class<? extends DatabaseObject> type) {
|
if ((identifier == null) || (identifier.length() < 1))
|
return false;
|
|
if (!identifier.matches("^(i?)[A-Z][A-Z0-9\\$\\_\\#]*$"))
|
return false;
|
|
/*
|
* @todo It seems we currently do not have a class for tablespace identifiers, and all other classes
|
* we do know seem to be supported as 12cR2 long identifiers, so:
|
*/
|
return (identifier.length() <= LONG_IDENTIFIERS_LEGNTH);
|
}
|
|
/**
|
* Returns the maximum number of bytes (NOT: characters) for an identifier. For Oracle <=12c Release 20, this
|
* is 30 bytes, and starting from 12cR2, up to 128 (except for tablespaces, PDB names and some other rather rare
|
* object types).
|
*
|
* @return the maximum length of an object identifier, in bytes
|
*/
|
public int getIdentifierMaximumLength() {
|
try {
|
if (getDatabaseMajorVersion() < ORACLE_12C_MAJOR_VERSION) {
|
return SHORT_IDENTIFIERS_LENGTH;
|
} else if ((getDatabaseMajorVersion() == ORACLE_12C_MAJOR_VERSION) && (getDatabaseMinorVersion() <= 1)) {
|
return SHORT_IDENTIFIERS_LENGTH;
|
} else {
|
return LONG_IDENTIFIERS_LEGNTH;
|
}
|
} catch (DatabaseException ex) {
|
throw new UnexpectedLiquibaseException("Cannot determine the Oracle database version number", ex);
|
}
|
|
}
|
}
|
