mysql 表注释查询

    CREATE FUNCTION `underlineToCamel`(paramString VARCHAR(200)) RETURNS varchar(200) CHARSET utf8
        DETERMINISTIC
    begin
                set paramString = LOWER(paramString);
            set paramString = replace(paramString, '_a', 'A');
        set paramString = replace(paramString, '_b', 'B');
        set paramString = replace(paramString, '_c', 'C');
        set paramString = replace(paramString, '_d', 'D');
        set paramString = replace(paramString, '_e', 'E');
        set paramString = replace(paramString, '_f', 'F');
        set paramString = replace(paramString, '_g', 'G');
        set paramString = replace(paramString, '_h', 'H');
        set paramString = replace(paramString, '_i', 'I');
        set paramString = replace(paramString, '_j', 'J');
        set paramString = replace(paramString, '_k', 'K');
        set paramString = replace(paramString, '_l', 'L');
        set paramString = replace(paramString, '_m', 'M');
        set paramString = replace(paramString, '_n', 'N');
        set paramString = replace(paramString, '_o', 'O');
        set paramString = replace(paramString, '_p', 'P');
        set paramString = replace(paramString, '_q', 'Q');
        set paramString = replace(paramString, '_r', 'R');
        set paramString = replace(paramString, '_s', 'S');
        set paramString = replace(paramString, '_t', 'T');
        set paramString = replace(paramString, '_u', 'U');
        set paramString = replace(paramString, '_v', 'V');
        set paramString = replace(paramString, '_w', 'W');
        set paramString = replace(paramString, '_x', 'X');
        set paramString = replace(paramString, '_y', 'Y');
        set paramString = replace(paramString, '_z', 'Z');
        set paramString = replace(paramString, '_', '');
        RETURN paramString;
        end

SELECT 
c.TABLE_SCHEMA as '数据库名',
c.TABLE_NAME as '表名',t.table_comment as 表中文名,
c.ORDINAL_POSITION as '序号',
c.COLUMN_NAME as '字段',
underlineToCamel(c.COLUMN_NAME) '驼峰字段',
c.COLUMN_COMMENT as '备注',
-- c.DATA_TYPE as '数据类型',
-- IFNULL(c.CHARACTER_MAXIMUM_LENGTH,c.numeric_precision) as '长度',
if(IFNULL(c.CHARACTER_MAXIMUM_LENGTH,c.numeric_precision) is null,c.DATA_TYPE,CONCAT(c.DATA_TYPE,"(",IFNULL(c.CHARACTER_MAXIMUM_LENGTH,c.numeric_precision),")")) as 数据类型,
c.IS_NULLABLE as '是否可以为空',# 是否必填 
c.COLUMN_DEFAULT as '默认值',
case c.column_key when 'PRI' then  '是' ELSE  '' end  '是否主键'
from  information_schema.columns c
LEFT JOIN information_schema.TABLES  t on c.TABLE_SCHEMA = t.TABLE_SCHEMA and c.TABLE_NAME = t.TABLE_NAME 
where 1=1