Question

已知事实：Oracle本身不支持Boolean。因此，建议使用Char（1）或Number（1），然后创建约束以将值限制为Y / N或0/1。

话虽如此。在为oracle数据库创建布尔值时，Liquibase会创建一个数字（1）。有谁知道它是否也创建数据库约束？即：“检查（bool in（0,1））”

http://dba-presents.com/index.php/liquibase/29-liquibase-3-3-x-data-types-mapping-table

Answer 1

创建更改日志：

<?xml version="1.0" encoding="utf-8"?>
<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext"
    xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.4.xsd">

   <changeSet author="arthur" id="42">
      <createTable tableName="bool_test">
        <column name="some_flag" type="boolean"/>
      </createTable>
   </changeSet>

</databaseChangeLog>

运行脚本

liquibase --changeLogFile=bool_test.xml update

显示表格定义

c:>sqlplus arthur/password

SQL*Plus: Release 12.1.0.1.0 Production on Tue Dec 20 18:19:21 2016

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

SQL> select dbms_metadata.get_ddl('TABLE', 'BOOL_TEST') from dual;

DBMS_METADATA.GET_DDL('TABLE','BOOL_TEST')
--------------------------------------------------------------------------------

  CREATE TABLE "ARTHUR"."BOOL_TEST"
   (    "SOME_FLAG" NUMBER(1,0)
   ) SEGMENT CREATION DEFERRED
  PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255
 NOCOMPRESS LOGGING
  TABLESPACE "USERS"

Liquibase如何为oracle映射布尔值？

1 个答案: