protected Connection initConnection() throws SQLException {
		if (db == null || db.isClosed()) {
			db = ds.getConnection();
		}
		return db;
	}
Establish PostgreSQL DB pooled {@link Connection} for this instance.
@return database connection
@throws SQLException if error occurs obtaining connection
Ghidra/Features/BSim/src/main/java/ghidra/features/bsim/query/client/AbstractSQLFunctionDatabase.java