如何使用MybatisPlus的SQL注入器提升批量插入性能

INSERT INTO your_table_name (column1, column2, column3)
VALUES
(value1a, value2a, value3a),
(value1b, value2b, value3b),
(value1c, value2c, value3c);

INSERT ALL
  INTO table_name (column1, column2, ...) VALUES (value1a, value2a, ...)
  INTO table_name (column1, column2, ...) VALUES (value1b, value2b, ...)
  INTO table_name (column1, column2, ...) VALUES (value1c, value2c, ...)
SELECT * FROM dual;

INSERT INTO table_name (column1, column2, ...)
SELECT value1a, value2a, ...
  FROM dual
UNION ALL
SELECT value1b, value2b, ...
  FROM dual
UNION ALL
SELECT value1c, value2c, ...
  FROM dual;

public class InsertBatchSomeColumnOracle extends AbstractMethod {
    // oracle 批量插入的格式
    private static String ORACLE_INSERT_SQL_MODE = "<script>\nINSERT ALL\n %s \n SELECT 1 FROM DUAL</script>";
    // 字段筛选条件
    @Setter
    @Accessors(chain = true)
    private Predicate<TableFieldInfo> predicate;
    public InsertBatchSomeColumnOracle() {
        super("insertBatchSomeColumnOracle");
    }
    @Override
    public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) {
        KeyGenerator keyGenerator = new NoKeyGenerator();
        List<TableFieldInfo> fieldList = tableInfo.getFieldList();
        String insertSqlColumn = tableInfo.getKeyInsertSqlColumn(true, false)
                + this.filterTableFieldInfo(fieldList, predicate, TableFieldInfo::getInsertSqlColumn, EMPTY);
        String columnScript = LEFT_BRACKET + insertSqlColumn.substring(0, insertSqlColumn.length() - 1) + RIGHT_BRACKET;
        String insertSqlProperty = tableInfo.getKeyInsertSqlProperty(true, ENTITY_DOT, false) + this.filterTableFieldInfo(fieldList, predicate, i -> i.getInsertSqlProperty(ENTITY_DOT), EMPTY);
        insertSqlProperty = LEFT_BRACKET + insertSqlProperty.substring(0, insertSqlProperty.length() - 1) + RIGHT_BRACKET;
        String oracleModelInsertSql = "INTO " + tableInfo.getTableName() + columnScript + " VALUES " + insertSqlProperty;
        String valuesScript = SqlScriptUtils.convertForeach(oracleModelInsertSql, "list", null, ENTITY, " ");
        String keyProperty = null;
        String keyColumn = null;
        //表包含主键处理逻辑，如果不包含主键当普通字段处理
        if (tableInfo.havePK()) {
            if (tableInfo.getIdType() == IdType.AUTO) {
                /* 自增主键 */
                keyGenerator = new Jdbc3KeyGenerator();
                keyProperty = tableInfo.getKeyProperty();
                keyColumn = tableInfo.getKeyColumn();
            } else {
                if (null != tableInfo.getKeySequence()) {
                    Keybenerator:
                    TableInfoHelper.genKeyGenerator("insertBatchSomeColumnOracle", tableInfo, builderAssistant);
                    keyProperty = tableInfo.getKeyProperty();
                    keyColumn = tableInfo.getKeyColumn();
                }
            }
        }
        String sql = String.format(ORACLE_INSERT_SQL_MODE, valuesScript);
        SqlSource sqlSource = languageDriver.createSqlSource(configuration, sql, modelClass);
        return this.addInsertMappedStatement(mapperClass, modelClass, "insertBatchSomeColumnOracle", sqlSource, keyGenerator, keyProperty, keyColumn);
    }
}

public class CustomerSqlInjector extends DefaultSqlInjector {
    @Override
    public List<AbstractMethod> getMethodList(Class<?> mapperclass, TableInfo tableInfo) {
        List<AbstractMethod> methodList = super.getMethodList(mapperclass, tableInfo);
        // 真正的批量插入，添加 InsertBatchSomeColumn 方法，以下仅适用于 MySQL
        methodList.add(new InsertBatchSomeColumn());
        // 真正的批量插入，添加 InsertBatchSomeColumn 方法，以下仅适用于 oracle
        methodList.add(new InsertBatchSomeColumnOracle());
        return methodList;
    }
}

public interface CustomerMapper<T> extends BaseMapper<T> {
    void insertBatchSomeColumn(@Param("list") List<T> list);
    void insertBatchSomeColumnOracle(@Param("list") List<T> list);
}

public interface CustomerService<T> extends Iservice<T> {
    void insertBatchSomeColumn(List<T> list);
    void insertBatchSomeColumnOracle(List<T> list);
}

@Mapper
public interface CsdnUserInfoMapper extends CustomerMapper<CsdnUserInfo> {
}

mybatis-plus:
  global-config:
    sql-injector: com.example.MyLogicSqlInjector