How to use

getTables

method

in

org.apache.shardingsphere.core.parsing.antlr.sql.statement.ddl.AlterTableStatement

/**
 * Find column definition from meta data.
 *
 * @param columnName column name
 * @param shardingTableMetaData sharding table meta data
 * @return column definition
 */
public Optional<ColumnDefinitionSegment> findColumnDefinitionFromMetaData(final String columnName, final ShardingTableMetaData shardingTableMetaData) {
  if (!shardingTableMetaData.containsTable(getTables().getSingleTableName())) {
    return Optional.absent();
  }
  for (ColumnMetaData each : shardingTableMetaData.get(getTables().getSingleTableName()).getColumns().values()) {
    if (columnName.equalsIgnoreCase(each.getColumnName())) {
      return Optional.of(new ColumnDefinitionSegment(columnName, each.getDataType(), each.isPrimaryKey()));
    }
  }
  return Optional.absent();
}

private void refreshTableMetaData(final AlterTableStatement alterTableStatement) {
  String logicTableName = alterTableStatement.getTables().getSingleTableName();
  TableMetaData newTableMetaData = TableMetaDataFactory.newInstance(alterTableStatement, getMetaData().getTable().get(logicTableName));
  Optional<String> newTableName = alterTableStatement.getNewTableName();
  if (newTableName.isPresent()) {
    getMetaData().getTable().put(newTableName.get(), newTableMetaData);
    getMetaData().getTable().remove(logicTableName);
  } else {
    getMetaData().getTable().put(logicTableName, newTableMetaData);
  }
}

private void refreshTableMetaData(final AlterTableStatement alterTableStatement) {
  String logicTableName = alterTableStatement.getTables().getSingleTableName();
  TableMetaData newTableMetaData = TableMetaDataFactory.newInstance(alterTableStatement, getMetaData().getTable().get(logicTableName));
  Optional<String> newTableName = alterTableStatement.getNewTableName();
  if (newTableName.isPresent()) {
    getMetaData().getTable().put(newTableName.get(), newTableMetaData);
    getMetaData().getTable().remove(logicTableName);
  } else {
    getMetaData().getTable().put(logicTableName, newTableMetaData);
  }
}

private void refreshTableMetaData(final ShardingContext shardingContext, final AlterTableStatement alterTableStatement) {
  String logicTableName = alterTableStatement.getTables().getSingleTableName();
  TableMetaData newTableMetaData = TableMetaDataFactory.newInstance(alterTableStatement, shardingContext.getMetaData().getTable().get(logicTableName));
  Optional<String> newTableName = alterTableStatement.getNewTableName();
  if (newTableName.isPresent()) {
    shardingContext.getMetaData().getTable().put(newTableName.get(), newTableMetaData);
    shardingContext.getMetaData().getTable().remove(logicTableName);
  } else {
    shardingContext.getMetaData().getTable().put(logicTableName, newTableMetaData);
  }
}