forked from opengaussexamples/examples
coding
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XudongXie
parent
c704d436aa
commit
e0a1c67c1b
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@ -4,13 +4,10 @@
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<option name="autoReloadType" value="SELECTIVE" />
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</component>
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<component name="ChangeListManager">
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<list default="true" id="d8d12963-4777-48e3-9669-309cf5e41d60" name="更改" comment="add function">
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<change afterPath="$PROJECT_DIR$/src/main/java/Document/DataType in Oracle" afterDir="false" />
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<change afterPath="$PROJECT_DIR$/src/main/java/Exception/GenerateFailedException.java" afterDir="false" />
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<list default="true" id="d8d12963-4777-48e3-9669-309cf5e41d60" name="更改" comment="coding">
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<change afterPath="$PROJECT_DIR$/src/main/java/Document/Column constraint in Oracle" afterDir="false" />
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<change afterPath="$PROJECT_DIR$/src/main/java/Document/Table constraint in Oracle" afterDir="false" />
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<change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
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<change beforePath="$PROJECT_DIR$/src/main/java/Generator/OpenGaussGenerator.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Generator/OpenGaussGenerator.java" afterDir="false" />
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<change beforePath="$PROJECT_DIR$/src/main/java/Main.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Main.java" afterDir="false" />
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<change beforePath="$PROJECT_DIR$/src/main/java/Parser/AST/CreateTable/ColumnNode.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Parser/AST/CreateTable/ColumnNode.java" afterDir="false" />
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</list>
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<option name="SHOW_DIALOG" value="false" />
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<option name="HIGHLIGHT_CONFLICTS" value="true" />
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@ -43,17 +40,17 @@
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<option name="hideEmptyMiddlePackages" value="true" />
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<option name="showLibraryContents" value="true" />
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</component>
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<component name="PropertiesComponent">{
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"keyToString": {
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"RunOnceActivity.OpenProjectViewOnStart": "true",
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"RunOnceActivity.ShowReadmeOnStart": "true",
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"last_opened_file_path": "F:/oracle2opengauss/examples/sqlTranslate",
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"project.structure.last.edited": "模块",
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"project.structure.proportion": "0.0",
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"project.structure.side.proportion": "0.0",
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"settings.editor.selected.configurable": "build.tools"
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<component name="PropertiesComponent"><![CDATA[{
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"keyToString": {
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"RunOnceActivity.OpenProjectViewOnStart": "true",
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"RunOnceActivity.ShowReadmeOnStart": "true",
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"last_opened_file_path": "F:/oracle2opengauss/examples/sqlTranslate",
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"project.structure.last.edited": "模块",
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"project.structure.proportion": "0.0",
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"project.structure.side.proportion": "0.0",
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"settings.editor.selected.configurable": "preferences.fileTypes"
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}
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}]]></component>
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<component name="RunManager" selected="应用程序.Main">
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<configuration name="App" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
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<option name="MAIN_CLASS_NAME" value="org.example.App" />
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@ -220,7 +217,14 @@
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<option name="project" value="LOCAL" />
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<updated>1724487486717</updated>
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</task>
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<option name="localTasksCounter" value="17" />
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<task id="LOCAL-00017" summary="coding">
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<created>1724506701566</created>
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<option name="number" value="00017" />
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<option name="presentableId" value="LOCAL-00017" />
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<option name="project" value="LOCAL" />
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<updated>1724506701566</updated>
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</task>
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<option name="localTasksCounter" value="18" />
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<servers />
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</component>
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<component name="Vcs.Log.Tabs.Properties">
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@ -243,7 +247,8 @@
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<MESSAGE value="revise" />
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<MESSAGE value="add parser function" />
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<MESSAGE value="add function" />
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<option name="LAST_COMMIT_MESSAGE" value="add function" />
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<MESSAGE value="coding" />
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<option name="LAST_COMMIT_MESSAGE" value="coding" />
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</component>
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<component name="XDebuggerManager">
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<watches-manager>
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@ -252,4 +257,8 @@
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</configuration>
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</watches-manager>
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</component>
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<component name="XSLT-Support.FileAssociations.UIState">
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<expand />
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<select />
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</component>
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</project>
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@ -0,0 +1,18 @@
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NOT NULL
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用于指定某列不允许为空。
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示例：column_name VARCHAR2(50) NOT NULL
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PRIMARY KEY
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用于指定某列为表的主键，主键列必须唯一且不能为空。
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示例：column_name NUMBER(10) PRIMARY KEY
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UNIQUE
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用于指定某列的值必须是唯一的，但允许为空。
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示例：column_name VARCHAR2(50) UNIQUE
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CHECK
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用于指定某列上的值必须满足一个条件。
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示例：column_name NUMBER CHECK (column_name > 0)
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FOREIGN KEY
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用于定义外键约束，外键引用另一个表的主键或唯一键。
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示例：column_name NUMBER(10) REFERENCES other_table(other_column)
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DEFAULT
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用于指定某列如果没有给定值时的默认值。
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示例：column_name VARCHAR2(50) DEFAULT 'default_value'
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@ -0,0 +1,14 @@
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PRIMARY KEY
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用于定义表的主键，主键列必须唯一且不能为空。
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可以定义单个列或多个列作为复合主键。
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示例：CONSTRAINT pk_example PRIMARY KEY (column1, column2)
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UNIQUE
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用于定义列的唯一性约束，允许为空。
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可以定义在单个列或多列上。
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示例：CONSTRAINT uk_example UNIQUE (column1)
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FOREIGN KEY
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用于定义外键约束，外键引用另一个表的主键或唯一键。
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示例：CONSTRAINT fk_example FOREIGN KEY (column1) REFERENCES other_table(column2)
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CHECK
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用于定义整个表的一个或多个列上的约束条件。
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示例：CONSTRAINT chk_example CHECK (column1 > 0)
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