/**
* Implementation delegates logic to the {@link
* liquibase.sqlgenerator.SqlGenerator#warn(liquibase.statement.SqlStatement,
* liquibase.database.Database, liquibase.sqlgenerator.SqlGeneratorChain)} method on the {@link
* SqlStatement} objects returned by {@link #generateStatements }. If a generated statement is not
* supported for the given database, no warning will be added since that is a validation error. If
* no or null SqlStatements are returned by generateStatements then this method returns no
* warnings.
*/
@Override
public Warnings warn(Database database) {
Warnings warnings = new Warnings();
if (generateStatementsVolatile(database)) {
return warnings;
}
SqlStatement[] statements = generateStatements(database);
if (statements == null) {
return warnings;
}
for (SqlStatement statement : statements) {
if (SqlGeneratorFactory.getInstance().supports(statement, database)) {
warnings.addAll(SqlGeneratorFactory.getInstance().warn(statement, database));
} else if (statement.skipOnUnsupported()) {
warnings.addWarning(
statement.getClass().getName()
+ " is not supported on "
+ database.getShortName()
+ ", but "
+ ChangeFactory.getInstance().getChangeMetaData(this).getName()
+ " will still execute");
}
}
return warnings;
}
private void outputStatement(SqlStatement sql, List<SqlVisitor> sqlVisitors)
throws DatabaseException {
try {
if (SqlGeneratorFactory.getInstance().generateStatementsVolatile(sql, database)) {
throw new DatabaseException(
sql.getClass().getSimpleName()
+ " requires access to up to date database metadata which is not available in SQL output mode");
}
for (String statement : applyVisitors(sql, sqlVisitors)) {
if (statement == null) {
continue;
}
output.write(statement);
if (database instanceof MSSQLDatabase
|| database instanceof SybaseDatabase
|| database instanceof SybaseASADatabase) {
output.write(StreamUtil.getLineSeparator());
output.write("GO");
// } else if (database instanceof OracleDatabase) {
// output.write(StreamUtil.getLineSeparator());
// output.write("/");
} else {
String endDelimiter = ";";
if (sql instanceof RawSqlStatement) {
endDelimiter = ((RawSqlStatement) sql).getEndDelimiter();
}
if (!statement.endsWith(endDelimiter)) {
output.write(endDelimiter);
}
}
output.write(StreamUtil.getLineSeparator());
output.write(StreamUtil.getLineSeparator());
}
} catch (IOException e) {
throw new DatabaseException(e);
}
}