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add Delete

This commit is contained in:
XudongXie 2024-09-12 22:56:47 +08:00
parent 84b694de4c
commit 824b2927d0
6 changed files with 114 additions and 6 deletions
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21
sqlTranslate/.idea/workspace.xml
View File

@ -4,8 +4,12 @@
<option name="autoReloadType" value="SELECTIVE" />
</component>
<component name="ChangeListManager">
<list default="true" id="d8d12963-4777-48e3-9669-309cf5e41d60" name="更改" comment="add update convert rules">
<change beforePath="$PROJECT_DIR$/src/main/java/Document/Todolist" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Document/Todolist" afterDir="false" />
<list default="true" id="d8d12963-4777-48e3-9669-309cf5e41d60" name="更改" comment="add Delete ast class">
<change afterPath="$PROJECT_DIR$/src/main/java/Document/Delete statement in Oracle" afterDir="false" />
<change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
<change beforePath="$PROJECT_DIR$/src/main/java/Generator/OpenGaussGenerator.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Generator/OpenGaussGenerator.java" afterDir="false" />
<change beforePath="$PROJECT_DIR$/src/main/java/Main.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Main.java" afterDir="false" />
<change beforePath="$PROJECT_DIR$/src/main/java/Parser/OracleParser.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/Parser/OracleParser.java" afterDir="false" />
</list>
<option name="SHOW_DIALOG" value="false" />
<option name="HIGHLIGHT_CONFLICTS" value="true" />
@ -418,7 +422,14 @@
<option name="project" value="LOCAL" />
<updated>1726151534112</updated>
</task>
<option name="localTasksCounter" value="46" />
<task id="LOCAL-00046" summary="add Delete ast class">
<created>1726152030692</created>
<option name="number" value="00046" />
<option name="presentableId" value="LOCAL-00046" />
<option name="project" value="LOCAL" />
<updated>1726152030692</updated>
</task>
<option name="localTasksCounter" value="47" />
<servers />
</component>
<component name="Vcs.Log.Tabs.Properties">
@ -433,7 +444,6 @@
</option>
</component>
<component name="VcsManagerConfiguration">
<MESSAGE value="init" />
<MESSAGE value="lexer" />
<MESSAGE value="AST node" />
<MESSAGE value="add AST node" />
@ -458,7 +468,8 @@
<MESSAGE value="add select convert rules" />
<MESSAGE value="add update ast class" />
<MESSAGE value="add update convert rules" />
<option name="LAST_COMMIT_MESSAGE" value="add update convert rules" />
<MESSAGE value="add Delete ast class" />
<option name="LAST_COMMIT_MESSAGE" value="add Delete ast class" />
</component>
<component name="XDebuggerManager">
<watches-manager>

1
sqlTranslate/src/main/java/Document/Delete statement in Oracle Normal file
View File

@ -0,0 +1 @@
DELETE FROM deleteObject WHERE condition ;

2
sqlTranslate/src/main/java/Document/Todolist
View File

@ -16,7 +16,7 @@ Operation
 return
 exception
 commit、rollback、execute
 alter table
 alter table 1
 create table 1
 drop table 1
Object

8
sqlTranslate/src/main/java/Generator/OpenGaussGenerator.java
View File

@ -5,6 +5,7 @@ import Parser.AST.ASTNode;
import Parser.AST.CreateTable.ColumnNode;
import Parser.AST.CreateTable.CreateTabNode;
import Exception.GenerateFailedException;
import Parser.AST.Delete.DeleteNode;
import Parser.AST.Drop.DropNode;
import Parser.AST.Drop.DropOptionNode;
import Parser.AST.Insert.InsertNode;
@ -48,6 +49,9 @@ public class OpenGaussGenerator {
else if (node instanceof UpdateNode) {
return GenUpdateSQL(node);
}
else if (node instanceof DeleteNode) {
return GenDeleteSQL(node);
}
else {
try {
throw new GenerateFailedException("Root node:" + node.getClass() + "(Unsupported node type!)");
@ -92,6 +96,10 @@ public class OpenGaussGenerator {
return node.toQueryString();
}
private String GenDeleteSQL(ASTNode node) {
return node.toQueryString();
}
private void visitCrt(ASTNode node) {
if (node instanceof ColumnNode) {
ColumnTypeConvert((ColumnNode) node);

6
sqlTranslate/src/main/java/Main.java
View File

@ -23,6 +23,12 @@ public class Main {
// "SET e.salary = e.salary * 1.10,\n" +
// " d.budget = d.budget * 1.10\n" +
// "WHERE d.department_name = 'Sales';";
// String sql = "DELETE FROM employees e\n" +
// "WHERE e.department_id IN (\n" +
// " SELECT d.department_id\n" +
// " FROM departments d\n" +
// " WHERE d.department_name = 'Sales'\n" +
// ");";
OracleLexer lexer = new OracleLexer(sql);
lexer.printTokens();
OracleParser parser = new OracleParser(lexer);

82
sqlTranslate/src/main/java/Parser/OracleParser.java
View File

@ -9,6 +9,10 @@ import Parser.AST.CaseWhen.CaseElseNode;
import Parser.AST.CaseWhen.CaseEndNode;
import Parser.AST.CaseWhen.CaseThenNode;
import Parser.AST.CreateTable.*;
import Parser.AST.Delete.DeleteConditionNode;
import Parser.AST.Delete.DeleteEndNode;
import Parser.AST.Delete.DeleteNode;
import Parser.AST.Delete.DeleteObjNode;
import Parser.AST.Drop.DropEndNode;
import Parser.AST.Drop.DropObjNameNode;
import Parser.AST.Drop.DropNode;
@ -50,6 +54,9 @@ public class OracleParser {
else if (lexer.getTokens().get(0).getValue().equalsIgnoreCase("UPDATE")) {
return parseUpdate(lexer.getTokens());
}
else if (lexer.getTokens().get(0).getValue().equalsIgnoreCase("DELETE")) {
return parseDelete(lexer.getTokens());
}
else {
try {
throw new ParseFailedException("Parse failed!");
@ -818,4 +825,79 @@ public class OracleParser {
return root;
}
/**
* Delete
* For example:
* DELETE FROM employees e
* WHERE e.department_id IN (
* SELECT d.department_id
* FROM departments d
* WHERE d.department_name = 'Sales'
* );
*/
private ASTNode parseDelete(List<Token> parseTokens) {
List<Token> tokens = new ArrayList<>();
tokens.add(parseTokens.get(0));
try{
tokens.add(parseTokens.get(1));
} catch (IndexOutOfBoundsException e) {
e.printStackTrace();
}
ASTNode root = new DeleteNode(tokens);
ASTNode currentNode = root;
for (int i = 2; i < parseTokens.size(); i++) {
// match delete object
if (i == 2 && parseTokens.get(i).hasType(Token.TokenType.IDENTIFIER)) {
tokens = new ArrayList<>();
for (int j = i; j < parseTokens.size(); j++) {
if (parseTokens.get(j).hasType(Token.TokenType.KEYWORD) && parseTokens.get(j).getValue().equalsIgnoreCase("WHERE")) {
i = j - 1;
break;
}
tokens.add(parseTokens.get(j));
}
ASTNode childNode = new DeleteObjNode(tokens);
currentNode.addChild(childNode);
currentNode = childNode;
}
// match WHERE condition
else if (parseTokens.get(i).hasType(Token.TokenType.KEYWORD) && parseTokens.get(i).getValue().equalsIgnoreCase("WHERE")) {
tokens = new ArrayList<>();
for (int j = i; j < parseTokens.size(); j++) {
if (parseTokens.get(j).hasType(Token.TokenType.SYMBOL) && parseTokens.get(j).getValue().equalsIgnoreCase(";")) {
i = j - 1;
break;
}
tokens.add(parseTokens.get(j));
}
ASTNode childNode = new DeleteConditionNode(tokens);
currentNode.addChild(childNode);
currentNode = childNode;
}
else if (parseTokens.get(i).hasType(Token.TokenType.SYMBOL) && parseTokens.get(i).getValue().equals(";")) {
tokens = new ArrayList<>();
tokens.add(parseTokens.get(i));
ASTNode childNode = new DeleteEndNode(tokens);
currentNode.addChild(childNode);
currentNode = childNode;
}
else if (parseTokens.get(i).hasType(Token.TokenType.EOF)) {
break;
}
else {
try {
throw new ParseFailedException("Parse failed:" + parseTokens.get(i));
}
catch (ParseFailedException e) {
e.printStackTrace();
}
}
}
return root;
}
}