# 查找在那个表并生成 字段名 SQL

SELECT TABLE_SCHEMA, TABLE_NAME, concat(TABLE_SCHEMA, '.', TABLE_NAME) AS st,

concat('SELECT ', group_concat(COLUMN_NAME ORDER BY ORDINAL_POSITION SEPARATOR ', ' ),

' FROM ' , concat(TABLE_SCHEMA, '.', TABLE_NAME) , ';') AS SQLstr

FROM information_schema.COLUMNS WHERE 1=1

AND TABLE_NAME like 'job_depend' GROUP BY TABLE_SCHEMA, TABLE_NAME ORDER BY length(TABLE_SCHEMA);

# 查找多个字段在哪个表 并生成 字段名 SQL

SELECT TABLE_SCHEMA, TABLE_NAME, concat(TABLE_SCHEMA, '.', TABLE_NAME) AS st,

concat('SELECT ', group_concat(COLUMN_NAME ORDER BY ORDINAL_POSITION SEPARATOR ', ' ),

' FROM ' , concat(TABLE_SCHEMA, '.', TABLE_NAME) , ';') AS SQLstr

FROM information_schema.COLUMNS WHERE 1=1

AND TABLE_NAME in ('job_depend','job_id') GROUP BY TABLE_SCHEMA, TABLE_NAME

HAVING count(TABLE_NAME)>=2 ORDER BY length(TABLE_SCHEMA);

# #{驼峰字段} (创建存储函数snakeToCamel后使用)

SELECT TABLE_SCHEMA, TABLE_NAME,

snakeToCamel(group_concat(concat('#{',COLUMN_NAME,'}')

ORDER BY ORDINAL_POSITION SEPARATOR ', ')) AS COLUMN_NAMES

FROM information_schema.COLUMNS WHERE 1=1

AND TABLE_NAME like 'job_depend' GROUP BY TABLE_SCHEMA, TABLE_NAME;

# 字段名=#{驼峰字段} SQL (创建存储函数snakeToCamel后使用)

SELECT TABLE_SCHEMA, TABLE_NAME, concat('UPDATE ', TABLE_NAME, ' SET\n',

group_concat(concat(' ', COLUMN_NAME,' = #{',snakeToCamel(COLUMN_NAME),'}')

ORDER BY ORDINAL_POSITION SEPARATOR ',\n')

, '\nWHERE col=val;')AS SQLStr

FROM information_schema.COLUMNS WHERE 1=1

AND TABLE_NAME like 'job_depend' GROUP BY TABLE_SCHEMA, TABLE_NAME;

# 打开 MySQL8 默认关闭的创建存储函数开关

SET GLOBAL log_bin_trust_function_creators = 1;

# 若存储过程存在则删除

DROP FUNCTION IF EXISTS snakeToCamel;

# 重定义分隔符，兼容 DataGrip 以外的程序

DELIMITER $

# 创建一个存储函数

CREATE FUNCTION snakeToCamel(snakeString VARCHAR(16383))

# 返回值类型

RETURNS VARCHAR(16383)

# 开始内容

BEGIN

set snakeString = replace(snakeString, '_a', 'A');

set snakeString = replace(snakeString, '_b', 'B');

set snakeString = replace(snakeString, '_c', 'C');

set snakeString = replace(snakeString, '_d', 'D');

set snakeString = replace(snakeString, '_e', 'E');

set snakeString = replace(snakeString, '_f', 'F');

set snakeString = replace(snakeString, '_g', 'G');

set snakeString = replace(snakeString, '_h', 'H');

set snakeString = replace(snakeString, '_i', 'I');

set snakeString = replace(snakeString, '_j', 'J');

set snakeString = replace(snakeString, '_k', 'K');

set snakeString = replace(snakeString, '_l', 'L');

set snakeString = replace(snakeString, '_m', 'M');

set snakeString = replace(snakeString, '_n', 'N');

set snakeString = replace(snakeString, '_o', 'O');

set snakeString = replace(snakeString, '_p', 'P');

set snakeString = replace(snakeString, '_q', 'Q');

set snakeString = replace(snakeString, '_r', 'R');

set snakeString = replace(snakeString, '_s', 'S');

set snakeString = replace(snakeString, '_t', 'T');

set snakeString = replace(snakeString, '_u', 'U');

set snakeString = replace(snakeString, '_v', 'V');

set snakeString = replace(snakeString, '_w', 'W');

set snakeString = replace(snakeString, '_x', 'X');

set snakeString = replace(snakeString, '_y', 'Y');

set snakeString = replace(snakeString, '_z', 'Z');

set snakeString = replace(snakeString, '_', '');

RETURN snakeString;

END;

DELIMITER ;

# 字段注释

SELECT TABLE_SCHEMA, TABLE_NAME,

group_concat(CASE COLUMN_COMMENT

WHEN '' THEN COLUMN_NAME

ELSE COLUMN_COMMENT END

ORDER BY ORDINAL_POSITION SEPARATOR ', ' ) AS COLUMN_NAMES

FROM information_schema.COLUMNS WHERE 1=1

AND TABLE_NAME like 'job_depend' GROUP BY TABLE_SCHEMA, TABLE_NAME;

# 查找在那个表并生成 字段名 AS 注释 SQL

SELECT TABLE_SCHEMA, TABLE_NAME,

concat('SELECT ',group_concat(

CASE COLUMN_COMMENT

WHEN '' THEN COLUMN_NAME

ELSE concat_ws(' AS ', COLUMN_NAME, COLUMN_COMMENT)

END

ORDER BY ORDINAL_POSITION SEPARATOR ', ')

, ' FROM ' , TABLE_SCHEMA, '.', TABLE_NAME, ';') AS SQLStr

FROM information_schema.COLUMNS WHERE 1=1

AND TABLE_NAME like 'job_depend' GROUP BY TABLE_SCHEMA, TABLE_NAME;

# /** 字段名 */\n private type 驼峰字段; (创建存储函数snakeToCamel后使用)

SELECT TABLE_SCHEMA, TABLE_NAME,

group_concat(concat(' /** ', COLUMN_COMMENT, ' */\n'

,' private ',

CASE COLUMN_TYPE

WHEN 'VARCHAR' THEN 'String'

WHEN 'CHAR' THEN 'String'

WHEN 'TEXT' THEN 'String'

WHEN 'TINYINT' THEN 'Integer'

WHEN 'SMALLINT' THEN 'Integer'

WHEN 'MEDIUMINT' THEN 'Integer'

WHEN 'BOOLEAN' THEN 'Integer'

WHEN 'BIGINT' THEN 'BigInteger'

WHEN 'INTEGER' THEN 'Long'

WHEN 'ID' THEN 'Long'

WHEN 'FLOAT' THEN 'Float'

WHEN 'DOUBLE' THEN 'Double'

WHEN 'DECIMAL' THEN 'BigDecimal'

WHEN 'BIT' THEN 'Boolean'

WHEN 'BLOB' THEN 'byte[]'

WHEN 'DATE' THEN 'Date'

WHEN 'YEAR' THEN 'Date'

WHEN 'TIME' THEN 'Time'

WHEN 'DATETIME' THEN 'Timestamp'

WHEN 'TIMESTAMP' THEN 'Timestamp'

ELSE 'String ' END,

snakeToCamel(COLUMN_NAME),';'

,'\n'

)

ORDER BY ORDINAL_POSITION SEPARATOR '\n' ) AS Java

FROM information_schema.COLUMNS WHERE 1=1

AND TABLE_NAME like 'job_depend' GROUP BY TABLE_SCHEMA, TABLE_NAME;