当自动建表时，一定要使用@Column(columnDefinition = "longtext")规范好字段的数据类型，要不然就全是varchar、int之类的

@Id
    private String id;
    private Integer similarity;
    private Integer totalLine;
    @Column(name = "code_snippet",columnDefinition = "longtext")
    private String codeSnippet;
    @Column(name = "filepath",columnDefinition = "varchar(1000)")
    private String filepath;
    private String filename;
    private Integer startLine;
    private Integer endLine;
    private String sourceId;