How to use

getModifiedColumnDefinitions

method

in

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

  private void fill(final ConstraintDefinitionSegment sqlSegment, final AlterTableStatement alterTableStatement, final ShardingTableMetaData shardingTableMetaData) {
    for (String each : sqlSegment.getPrimaryKeyColumnNames()) {
      Optional<ColumnDefinitionSegment> modifiedColumn = alterTableStatement.findColumnDefinition(each, shardingTableMetaData);
      if (modifiedColumn.isPresent()) {
        modifiedColumn.get().setPrimaryKey(true);
        alterTableStatement.getModifiedColumnDefinitions().put(each, modifiedColumn.get());
      }
    }
  }
}

  @Override
  public void fill(final RenameColumnSegment sqlSegment, final SQLStatement sqlStatement, final String sql, final ShardingRule shardingRule, final ShardingTableMetaData shardingTableMetaData) {
    AlterTableStatement alterTableStatement = (AlterTableStatement) sqlStatement;
    Optional<ColumnDefinitionSegment> oldColumnDefinition = alterTableStatement.findColumnDefinition(sqlSegment.getOldColumnName(), shardingTableMetaData);
    if (!oldColumnDefinition.isPresent()) {
      return;
    }
    oldColumnDefinition.get().setColumnName(sqlSegment.getColumnName());
    alterTableStatement.getModifiedColumnDefinitions().put(sqlSegment.getOldColumnName(), oldColumnDefinition.get());
  }
}

  @Override
  public void fill(final ModifyColumnDefinitionSegment sqlSegment, 
           final SQLStatement sqlStatement, final String sql, final ShardingRule shardingRule, final ShardingTableMetaData shardingTableMetaData) {
    AlterTableStatement alterTableStatement = (AlterTableStatement) sqlStatement;
    Optional<String> oldColumnName = sqlSegment.getOldColumnName();
    if (oldColumnName.isPresent()) {
      Optional<ColumnDefinitionSegment> oldColumnDefinition = alterTableStatement.findColumnDefinition(oldColumnName.get(), shardingTableMetaData);
      if (!oldColumnDefinition.isPresent()) {
        return;
      }
      oldColumnDefinition.get().setColumnName(sqlSegment.getColumnDefinition().getColumnName());
      if (null != sqlSegment.getColumnDefinition().getDataType()) {
        oldColumnDefinition.get().setDataType(sqlSegment.getColumnDefinition().getDataType());
      }
      alterTableStatement.getModifiedColumnDefinitions().put(oldColumnName.get(), oldColumnDefinition.get());
    } else {
      alterTableStatement.getModifiedColumnDefinitions().put(sqlSegment.getColumnDefinition().getColumnName(), sqlSegment.getColumnDefinition());
    }
    if (sqlSegment.getColumnPosition().isPresent()) {
      alterTableStatement.getChangedPositionColumns().add(sqlSegment.getColumnPosition().get());
    }
  }
}

/**
 * New instance of table meta data.
 *
 * @param alterTableStatement alter table statement
 * @param oldTableMetaData old table meta data
 * @return instance of table meta data
 */
public static TableMetaData newInstance(final AlterTableStatement alterTableStatement, final TableMetaData oldTableMetaData) {
  List<ColumnMetaData> result = createColumnMetaDataList(alterTableStatement.getModifiedColumnDefinitions(), alterTableStatement.isDropPrimaryKey(), oldTableMetaData);
  result.addAll(createColumnMetaDataList(alterTableStatement.getAddedColumnDefinitions(), alterTableStatement.isDropPrimaryKey()));
  changeColumnDefinitionPositions(alterTableStatement.getChangedPositionColumns(), result);
  dropColumnDefinitions(alterTableStatement.getDroppedColumnNames(), result);
  return new TableMetaData(result);
}