@Override
public void existingTableDetected(
Connection connection, Table table, Model model, Database database) throws SQLException {
if (Model.ANCESTORS_TABLE_NAME.equals(table.getKey())) {
if (!pathOptimizationsEnabled) {
log.info("Path optimizations disabled");
return;
}
// check if we want to initialize the descendants table now, or log
// a warning if the hierarchy table is too big
String sql = "SELECT id FROM ancestors LIMIT 1";
Statement s = connection.createStatement();
ResultSet rs = s.executeQuery(sql);
boolean empty = !rs.next();
rs.close();
s.close();
if (empty) {
pathOptimizationsEnabled = false;
log.error(
"Table ANCESTORS empty, must be upgraded by hand by calling: "
+ "SELECT nx_init_ancestors()");
log.info("Path optimizations disabled");
}
}
}
@Override
public boolean preCreateTable(Connection connection, Table table, Model model, Database database)
throws SQLException {
String tableKey = table.getKey();
if (model.HIER_TABLE_NAME.equals(tableKey)) {
hierarchyCreated = true;
return true;
}
if (model.ANCESTORS_TABLE_NAME.equals(tableKey)) {
if (hierarchyCreated) {
// database initialization
return true;
}
// upgrade of an existing database
// check hierarchy size
String sql = "SELECT COUNT(*) FROM hierarchy WHERE NOT isproperty";
Statement s = connection.createStatement();
ResultSet rs = s.executeQuery(sql);
rs.next();
long count = rs.getLong(1);
rs.close();
s.close();
if (count > 100000) {
// if the hierarchy table is too big, tell the admin to do the
// init by hand
pathOptimizationsEnabled = false;
log.error(
"Table ANCESTORS not initialized automatically because table HIERARCHY is too big. "
+ "Upgrade by hand by calling: SELECT nx_init_ancestors()");
}
return true;
}
return true;
}
@Override
public List<String> getPostCreateTableSqls(Table table, Model model, Database database) {
if (Model.ANCESTORS_TABLE_NAME.equals(table.getKey())) {
List<String> sqls = new ArrayList<String>();
if (pathOptimizationsEnabled) {
sqls.add("SELECT nx_init_ancestors()");
} else {
log.info("Path optimizations disabled");
}
return sqls;
}
return Collections.emptyList();
}
