如何解决MySQL查询以显示开发和生产模式之间的差异
| 我想使用MySQL中的模式数据库进行查询 该图显示了两个数据库模式（生产和开发）之间的列，触发器和存储过程之间的差异。 查询，不是工具 我看过比较两个MySQL数据库 其中列出了可以执行此任务的工具，但我想知道是否存在可以执行此任务的查询。 请只提出查询，我真的不想知道工具，命令行黑客之类的东西。 我正在查看生产数据库和开发数据库是否不同步。 以及添加或更改了哪些字段，过程等，因此，如果我发布使用该数据库的客户端软件的新更新，则可以更新生产数据库。 我正在使用MySQL 5.1最新版本。解决方法
Johan，尝试运行此脚本。在脚本开头，在变量中指定要比较的两个数据库。查询返回数据集，并设置表/视图列的状态。
状态“仅在源中”-对象仅存在于db1中；
状态“仅在目标中”-对象仅存在于db2中；
状态“在两个模式中”-对象存在于db1和db2中，但是细节可以不同；例如：value \'varchar（255）/ int（11）\'表示源字段类型为\'varchar（255）\'，目标字段为\'int（11）\'，值\'null \'说细节是平等的；
SET @source_db = \'db1\';
SET @target_db = \'db2\';
SELECT
\'Only in source\' exist_type,c1.table_schema,c1.table_name,c1.column_name,c1.ordinal_position,c1.column_default,c1.is_nullable,c1.numeric_precision,c1.numeric_scale,c1.character_set_name,c1.collation_name,c1.column_type,c1.column_key,c1.extra,c1.column_comment
FROM
(SELECT * FROM information_schema.columns WHERE TABLE_SCHEMA = @source_db) c1
LEFT JOIN (SELECT * FROM information_schema.columns WHERE TABLE_SCHEMA = @target_db) c2
ON c1.TABLE_name = c2.TABLE_name AND c1.column_name = c2.column_name
WHERE c2.column_name is null
UNION ALL
SELECT
\'Only in target\' exist_type,c2.table_schema,c2.table_name,c2.column_name,c2.ordinal_position,c2.column_default,c2.is_nullable,c2.numeric_precision,c2.numeric_scale,c2.character_set_name,c2.collation_name,c2.column_type,c2.column_key,c2.extra,c2.column_comment
FROM
(SELECT * FROM information_schema.columns WHERE TABLE_SCHEMA = @source_db) c1
RIGHT JOIN (SELECT * FROM information_schema.columns WHERE TABLE_SCHEMA = @target_db) c2
ON c1.TABLE_name = c2.TABLE_name AND c1.column_name = c2.column_name
WHERE c1.column_name is null
UNION ALL
SELECT
\'In both schemas\' exist_type,CONCAT(c1.table_schema,\'/\',c2.table_schema),IF(c1.ordinal_position = c2.ordinal_position OR c1.ordinal_position IS NULL AND c2.ordinal_position IS NULL,NULL,CONCAT_WS(\'/\',IFNULL(c1.ordinal_position,\'\'),IFNULL(c2.ordinal_position,\'\'))),IF(c1.column_default = c2.column_default OR c1.column_default IS NULL AND c2.column_default IS NULL,IFNULL(c1.column_default,IFNULL(c2.column_default,IF(c1.is_nullable = c2.is_nullable OR c1.is_nullable IS NULL AND c2.is_nullable IS NULL,IFNULL(c1.is_nullable,IFNULL(c2.is_nullable,IF(c1.numeric_precision = c2.numeric_precision OR c1.numeric_precision IS NULL AND c2.numeric_precision IS NULL,IFNULL(c1.numeric_precision,IFNULL(c2.numeric_precision,IF(c1.numeric_scale = c2.numeric_scale OR c1.numeric_scale IS NULL AND c2.numeric_scale IS NULL,IFNULL(c1.numeric_scale,IFNULL(c2.numeric_scale,IF(c1.character_set_name = c2.character_set_name OR c1.character_set_name IS NULL AND c2.character_set_name IS NULL,IFNULL(c1.character_set_name,IFNULL(c2.character_set_name,IF(c1.collation_name = c2.collation_name OR c1.collation_name IS NULL AND c2.collation_name IS NULL,IFNULL(c1.collation_name,IFNULL(c2.collation_name,IF(c1.column_type = c2.column_type OR c1.column_type IS NULL AND c2.column_type IS NULL,IFNULL(c1.column_type,IFNULL(c2.column_type,IF(c1.column_key = c2.column_key OR c1.column_key IS NULL AND c2.column_key IS NULL,IFNULL(c1.column_key,IFNULL(c2.column_key,IF(c1.extra = c2.extra OR c1.extra IS NULL AND c2.extra IS NULL,IFNULL(c1.extra,IFNULL(c2.extra,IF(c1.column_comment = c2.column_comment OR c1.column_comment IS NULL AND c2.column_comment IS NULL,IFNULL(c1.column_comment,IFNULL(c2.column_comment,\'\')))
FROM
(SELECT * FROM information_schema.columns WHERE TABLE_SCHEMA = @source_db) c1
JOIN (SELECT * FROM information_schema.columns WHERE TABLE_SCHEMA = @target_db) c2
ON c1.TABLE_name = c2.TABLE_name AND c1.column_name = c2.column_name;
select
(case t1.table_name=t2.table_name when 1 then concat(t1.table_name,\"==\",t2.table_name) else concat(t1.table_name,\"!=\",t2.table_name) end) as table_name,(case t1.column_name=t2.column_name when 1 then concat(t1.column_name,t2.column_name) else concat(t1.column_name,t2.column_name) end) as column_name,(case t1.ORDINAL_POSITION=t2.ORDINAL_POSITION when 1 then concat(t1.ORDINAL_POSITION,t2.ORDINAL_POSITION) else concat(t1.ORDINAL_POSITION,t2.ORDINAL_POSITION) end) as ORDINAL_POSITION
......--columns in information_schema
from columns t1 left join (select * from columns where table_schema=\'t2\') t2 on t2.table_name=t1.table_name and t2.column_name=t1.column_name where t1.table_schema=\'t1\';
a) enable logs
b) Go through all binary logs files
c) grep desired statements
d) at then end purge/reset binary logs ie. RESET MASTER
SET @source_db = \'qls_projects_for_comparison\';
SET @target_db = \'qls_projects\';
-- Pick one and comment out the other
-- SET @routine_type = \'FUNCTION\';
SET @routine_type = \'PROCEDURE\';
-- Get the ones only in the source
SELECT
\'Only in SOURCE\' exist_type,C1.ROUTINE_NAME,C1.ROUTINE_SCHEMA,C1.ROUTINE_TYPE,C1.LAST_ALTERED,C1.DEFINER as \'Source Definer\',C2.DEFINER
as \'Target Definer\',def_compare as \'Compare Definitions\'
FROM (
(SELECT *,\'\' as def_compare FROM INFORMATION_SCHEMA.ROUTINES WHERE
ROUTINE_TYPE = @routine_type AND ROUTINE_SCHEMA = @source_db) C1
LEFT JOIN (SELECT * FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_TYPE =
@routine_type AND ROUTINE_SCHEMA = @target_db) C2
ON C1.ROUTINE_NAME = C2.ROUTINE_NAME
)
WHERE C2.ROUTINE_NAME IS NULL
UNION ALL
-- Get the ones only in the target
SELECT
\'Only in TARGET\' exist_type,C2.ROUTINE_NAME,C2.ROUTINE_SCHEMA,C2.ROUTINE_TYPE,C2.LAST_ALTERED,C2.DEFINER
as \'Target Definer\',def_compare as \'Compare Definitions\'
FROM (
(SELECT * FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_TYPE =
@routine_type AND ROUTINE_SCHEMA = @source_db) C1
RIGHT JOIN (SELECT *,\'\' as def_compare FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_TYPE = @routine_type AND ROUTINE_SCHEMA = @target_db) C2
ON C1.ROUTINE_NAME = C2.ROUTINE_NAME
)
WHERE C1.ROUTINE_NAME IS NULL
UNION ALL
-- Get the ones in both and compare the bodies of the routines
SELECT
\'In both schemas\' exist_type,C2.DEFINER as \'Target Definer\',IF(C1.ROUTINE_DEFINITION=C2.ROUTINE_DEFINITION,\'Matches\',\'Does Not Match\')
as \'Compare Definitions\'
FROM (
(SELECT * FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_TYPE =
@routine_type AND ROUTINE_SCHEMA = @source_db) C1
INNER JOIN (SELECT * FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_TYPE =
@routine_type AND ROUTINE_SCHEMA = @target_db) C2
ON C1.ROUTINE_NAME = C2.ROUTINE_NAME
)
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