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Liquibase is a tool for managing and executing database changes.
package liquibase.database.core;
import liquibase.database.AbstractJdbcDatabase;
import liquibase.database.DatabaseConnection;
import liquibase.database.ObjectQuotingStrategy;
import liquibase.exception.DatabaseException;
import liquibase.exception.DateParseException;
import liquibase.structure.DatabaseObject;
import liquibase.structure.core.Table;
import liquibase.util.ISODateFormat;
import java.math.BigInteger;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
import static liquibase.statement.DatabaseFunction.CURRENT_DATE_TIME_PLACE_HOLDER;
public class HsqlDatabase extends AbstractJdbcDatabase {
private static final Map> SUPPORTED_DEFAULT_VALUE_COMPUTED_MAP;
private static final String START_CONCAT = "CONCAT(";
private static final String END_CONCAT = ")";
private static final String SEP_CONCAT = ", ";
private static final List keywords = Arrays.asList(
"ADD",
"ALL",
"ALLOCATE",
"ALTER",
"AND",
"ANY",
"ARE",
"ARRAY",
"AS",
"ASENSITIVE",
"ASYMMETRIC",
"AT",
"ATOMIC",
"AUTHORIZATION",
"AVG",
"BEGIN",
"BETWEEN",
"BIGINT",
"BINARY",
"BLOB",
"BOOLEAN",
"BOTH",
"BY",
"CALL",
"CALLED",
"CASCADED",
"CASE",
"CAST",
"CHAR",
"CHARACTER",
"CHECK",
"CLOB",
"CLOSE",
"COLLATE",
"COLUMN",
"COMMIT",
"CONDITION",
"CONNECT",
"CONSTRAINT",
"CONTINUE",
"CORRESPONDING",
"COUNT",
"CREATE",
"CROSS",
"CUBE",
"CURRENT",
"CURRENT_DATE",
"CURRENT_DEFAULT_TRANSFORM_GRO",
"CURRENT_PATH",
"CURRENT_ROLE",
"CURRENT_TIME",
"CURRENT_TIMESTAMP",
"CURRENT_TRANSFORM_GROUP_FOR_T",
"CURRENT_USER",
"CURSOR",
"DATE",
"DAY",
"DEALLOCATE",
"DEC",
"DECIMAL",
"DECLARE",
"DEFAULT",
"DELETE",
"DEREF",
"DESCRIBE",
"DETERMINISTIC",
"DISCONNECT",
"DISTINCT",
"DO",
"DOUBLE",
"DROP",
"DYNAMIC",
"EACH",
"ELEMENT",
"ELSE",
"ELSEIF",
"END",
"ESCAPE",
"EXCEPT",
"EXEC",
"EXECUTE",
"EXISTS",
"EXIT",
"EXTERNAL",
"FALSE",
"FETCH",
"FILTER",
"FLOAT",
"FOR",
"FOREIGN",
"FREE",
"FROM",
"FULL",
"FUNCTION",
"GET",
"GLOBAL",
"GRANT",
"GROUP",
"HAVING",
"HOLD",
"HOUR",
"IDENTITY",
"IF",
"IMMEDIATE",
"IN",
"INDICATOR",
"INNER",
"INOUT",
"INPUT",
"INSENSITIVE",
"INSERT",
"INT",
"INTEGER",
"INTERSECT",
"INTERVAL",
"INTO",
"IS",
"ITERATE",
"JOIN",
"LANGUAGE",
"LARGE",
"LEADING",
"LEAVE",
"LEFT",
"LIKE",
"LOCAL",
"LOCALTIME",
"LOCALTIMESTAMP",
"LOOP",
"MATCH",
"MAX",
"MEMBER",
"MERGE",
"METHOD",
"MIN",
"MINUTE",
"MODIFIES",
"MODULE",
"MONTH",
"MULTISET",
"NATIONAL",
"NATURAL",
"NCHAR",
"NCLOB",
"NEW",
"NO",
"NONE",
"NOT",
"NULL",
"NUMERIC",
"OF",
"ON",
"ONLY",
"OPEN",
"OR",
"ORDER",
"OUT",
"OUTER",
"OUTPUT",
"OVER",
"OVERLAPS",
"PARAMETER",
"PARTITION",
"PRECISION",
"PREPARE",
"PRIMARY",
"PROCEDURE",
"RANGE",
"READS",
"REAL",
"RECURSIVE",
"REF",
"REFERENCES",
"REFERENCING",
"RELEASE",
"REPEAT",
"RESIGNAL",
"RESULT",
"RETURN",
"RETURNS",
"REVOKE",
"RIGHT",
"ROLLBACK",
"ROLLUP",
"ROW",
"ROWS",
"SAVEPOINT",
"SCOPE",
"SCROLL",
"SEARCH",
"SELECT",
"SENSITIVE",
"SESSION_USER",
"SET",
"SIGNAL",
"SIMILAR",
"SMALLINT",
"SOME",
"SPECIFIC",
"SPECIFICTYPE",
"SQL",
"SQLEXCEPTION",
"SQLSTATE",
"SQLWARNING",
"START",
"STATIC",
"SUBMULTISET",
"SUM",
"SYMMETRIC",
"SYSTEM",
"SYSTEM_USER",
"TABLE",
"TABLESAMPLE",
"THEN",
"TIME",
"TIMESTAMP",
"TIMEZONE_HOUR",
"TIMEZONE_MINUTE",
"TO",
"TRAILING",
"TREAT",
"TRIGGER",
"TRUE",
"UNDO",
"UNION",
"UNIQUE",
"UNNEST",
"UNTIL",
"UPDATE",
"USER",
"USING",
"VALUE",
"VALUES",
"VARCHAR",
"VARYING",
"WHEN",
"WHENEVER",
"WHERE",
"WHILE",
"WINDOW",
"WITHIN",
"WITHOUT",
"YEAR",
"ALIAS",
"AUTOCOMMIT",
"CACHED",
"CHECKPOINT",
"EXPLAIN",
"IGNORECASE",
"INDEX",
"LOGSIZE",
"MATCHED",
"MAXROWS",
"MEMORY",
"MINUS",
"NEXT",
"OPENBRACKET",
"PLAN",
"PROPERTY",
"READONLY",
"REFERENTIAL_INTEGRITY",
"RENAME",
"RESTART",
"SCRIPT",
"SCRIPTFORMAT",
"SEMICOLON",
"SHUTDOWN",
"TEMP",
"TEXT",
"VIEW",
"WRITE_DELAY",
"VAR_POP",
"VAR_SAMP",
"STDDEV_POP",
"STDDEV_SAMP",
"DEFRAG",
"INCREMENT",
"TOCHAR",
"DATABASE",
"SCHEMA",
"ROLE",
"DOW",
"INITIAL");
static {
Map> tempMap = new HashMap<>();
tempMap.put("datetime", new HashSet<>(Arrays.asList("CURRENT_DATE", "CURRENT_TIME", "CURRENT_TIMESTAMP", "TODAY", "NOW", CURRENT_DATE_TIME_PLACE_HOLDER)));
SUPPORTED_DEFAULT_VALUE_COMPUTED_MAP = Collections.unmodifiableMap(tempMap);
}
private Boolean oracleSyntax;
public HsqlDatabase() {
super.unquotedObjectsAreUppercased = true;
super.setCurrentDateTimeFunction("NOW");
super.sequenceNextValueFunction = "NEXT VALUE FOR %s";
super.defaultAutoIncrementStartWith = BigInteger.ZERO;
super.sequenceCurrentValueFunction = "CURRVAL('%s')";
}
/**
* Checks to see if the string is an acceptable computed value for HSQL
* "datetime" columns are the only columns for which HSQL supports computer values.
*
* @param columnType String of the column's data type
* @param defaultValue String to be checked for valid valueComputed in HSQL
* @return boolean True if the string represents a function supported by HSQL for default values
*/
public static boolean supportsDefaultValueComputed(String columnType, String defaultValue) {
HashSet possibleComputedValues = SUPPORTED_DEFAULT_VALUE_COMPUTED_MAP.get(columnType);
return (possibleComputedValues != null) && possibleComputedValues.contains(defaultValue.toLowerCase());
}
@Override
public boolean isCorrectDatabaseImplementation(DatabaseConnection conn) throws DatabaseException {
return "HSQL Database Engine".equalsIgnoreCase(conn.getDatabaseProductName());
}
@Override
public String getDefaultDriver(String url) {
if (url.startsWith("jdbc:hsqldb:")) {
return "org.hsqldb.jdbcDriver";
}
return null;
}
@Override
public Integer getDefaultPort() {
return 9001;
}
@Override
protected String getDefaultDatabaseProductName() {
return "HyperSQL";
}
@Override
public int getPriority() {
return PRIORITY_DEFAULT;
}
@Override
public String getShortName() {
return "hsqldb";
}
@Override
public boolean supportsSequences() {
return true;
}
@Override
public boolean supportsInitiallyDeferrableColumns() {
return false;
}
@Override
public boolean supportsCatalogs() {
try {
return getDatabaseMajorVersion() >= 2;
} catch (DatabaseException e) {
return true;
}
}
@Override
protected String getConnectionCatalogName() throws DatabaseException {
if (supportsCatalogs()) {
return "PUBLIC";
} else {
return null;
}
}
@Override
protected String getConnectionSchemaName() {
return "PUBLIC";
}
@Override
public String getConcatSql(String... values) {
if (values == null) {
return null;
}
return getConcatSql(Arrays.asList(values));
}
/**
* Recursive way of building CONCAT instruction
*
* @param values a non null List of String
* @return a String containing the CONCAT instruction with all elements, or only a value if there is only one element in the list
*/
private String getConcatSql(List values) {
if (values.size() == 1) {
return values.get(0);
} else {
return START_CONCAT + values.get(0) + SEP_CONCAT + getConcatSql(values.subList(1, values.size())) + END_CONCAT;
}
}
@Override
public String getDateLiteral(String isoDate) {
String returnString = isoDate;
try {
if (isDateTime(isoDate)) {
ISODateFormat isoTimestampFormat = new ISODateFormat();
DateFormat dbTimestampFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
returnString = dbTimestampFormat.format(isoTimestampFormat.parse(isoDate));
}
} catch (ParseException e) {
throw new RuntimeException("Unexpected date format: " + isoDate, e);
}
return "'" + returnString + "'";
}
@Override
public Date parseDate(String dateAsString) throws DateParseException {
try {
if (dateAsString.indexOf(" ") > 0) {
return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS").parse(dateAsString);
} else {
if (dateAsString.indexOf(":") > 0) {
return new SimpleDateFormat("HH:mm:ss").parse(dateAsString);
} else {
return new SimpleDateFormat("yyyy-MM-dd").parse(dateAsString);
}
}
} catch (ParseException e) {
throw new DateParseException(dateAsString);
}
}
@Override
public boolean supportsTablespaces() {
return false;
}
@Override
public boolean isReservedWord(String value) {
return keywords.contains(value.toUpperCase());
}
@Override
public boolean isCaseSensitive() {
return false;
}
@Override
public void setConnection(DatabaseConnection conn) {
oracleSyntax = null;
super.setConnection(conn);
}
public boolean isUsingOracleSyntax() {
if (oracleSyntax == null) {
oracleSyntax = Boolean.FALSE;
if ((getConnection() != null) && (getConnection().getURL() != null)) {
for (String str : getConnection().getURL().split(";")) {
if (str.contains("sql.syntax_ora") && str.contains("=")) {
oracleSyntax = Boolean.valueOf(str.split("=")[1].trim());
break;
}
}
}
}
return oracleSyntax;
}
@Override
public String escapeObjectName(String objectName, Class objectType) {
if (quotingStrategy == ObjectQuotingStrategy.QUOTE_ALL_OBJECTS) {
return super.escapeObjectName(objectName, objectType);
}
if ((objectName != null) && (quotingStrategy != ObjectQuotingStrategy.QUOTE_ALL_OBJECTS) && isReservedWord
(objectName.toUpperCase(Locale.US))) {
return "\""+objectName.toUpperCase(Locale.US)+"\"";
}
return objectName;
}
@Override
public int getMaxFractionalDigitsForTimestamp() {
// HyperSQL does not seem to specify the exact number of possible fractional digits in its documentation,
// this value is derived from tests.
return 9;
}
@Override
public String getAutoIncrementClause(BigInteger startWith, BigInteger incrementBy, String generationType, Boolean defaultOnNull) {
final String clause = super.getAutoIncrementClause(startWith, incrementBy, generationType, defaultOnNull);
return clause.replace(",", ""); //sql doesn't use commas between the values
}
@Override
public boolean supportsCreateIfNotExists(Class type) {
return type.isAssignableFrom(Table.class);
}
}