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lower_Case_tables_name #1119

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Aug 12, 2024
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lower_Case_tables_name #1119

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19 changes: 17 additions & 2 deletions docs/MatrixOne/Reference/Variable/system-variables/lower_case_tables_name.md
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
# lower_case_table_names 大小写敏感支持

`lower_case_table_names` 是 MatrixOne 设置大小写是否敏感的一个全局变量。
`lower_case_table_names` 是 MatrixOne 设置库表名大小写是否敏感的一个全局变量。

!!! note
与 mysql 不同的是，MatrixOne 暂时只支持 **0** 和 **1** 两种模式，且在 linux 和 mac 系统下默认值都为 1。
Expand Down Expand Up @@ -48,7 +48,16 @@ mysql> show variables like "lower_case_table_names";--重连数据库查看参
+------------------------+-------+
1 row in set (0.00 sec)

mysql> use DB1;--库名大小写敏感
ERROR 1049 (HY000): invalid database DB1

mysql> use db1;
Database changed

create table Tt (Aa int);
mysql> insert into tt values (1,2), (2,3), (3,4);--表名大小写敏感
ERROR 1146 (HY000): no such table db1.tt

insert into Tt values (1), (2), (3);

mysql> select Aa from Tt;--名称比较大小写敏感
Expand Down Expand Up @@ -79,8 +88,14 @@ mysql> show variables like "lower_case_table_names";--重连数据库查看参
+------------------------+-------+
1 row in set (0.00 sec)

mysql> use DB1;--库名大小写不敏感
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed

create table Tt (Aa int,Bb int);
insert into Tt values (1,2), (2,3), (3,4);
insert into tt values (1,2), (2,3), (3,4);--表名大小写不敏感

mysql> select Aa from Tt;--名称比较大小写不敏感
+------+
Expand Down
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