How to use

ready

method

in

org.apache.calcite.prepare.PlannerImpl

public SqlNode parse(final String sql) throws SqlParseException {
 switch (state) {
 case STATE_0_CLOSED:
 case STATE_1_RESET:
  ready();
 }
 ensure(State.STATE_2_READY);
 SqlParser parser = SqlParser.create(sql, parserConfig);
 SqlNode sqlNode = parser.parseStmt();
 state = State.STATE_3_PARSED;
 return sqlNode;
}

public SqlNode parse(final Reader reader) throws SqlParseException {
 switch (state) {
 case STATE_0_CLOSED:
 case STATE_1_RESET:
  ready();
 }
 ensure(State.STATE_2_READY);
 SqlParser parser = SqlParser.create(reader, parserConfig);
 SqlNode sqlNode = parser.parseStmt();
 state = State.STATE_3_PARSED;
 return sqlNode;
}

@Override public RelRoot expandView(RelDataType rowType, String queryString,
  List<String> schemaPath, List<String> viewPath) {
 if (planner == null) {
  ready();