增强Parser

git-svn-id: http://code.alibabatech.com/svn/druid/trunk@132 b9813039-fb51-4c41-a8b9-e21c2acb5095

src/main/java/com/alibaba/druid/sql/dialect/oracle/ast/visitor/OracleOutputVisitor.java

@@ -560,6 +560,10 @@ public class OracleOutputVisitor extends SQLASTOutputVisitor implements OracleAS
     }
 
     public boolean visit(OracleSelectHierachicalQueryClause x) {
+        print("START WITH ");
+        x.getStartWith().accept(this);
+        
+        println();
         print("CONNECT BY ");
         
         if (x.isPrior()) {
@@ -571,8 +575,7 @@ public class OracleOutputVisitor extends SQLASTOutputVisitor implements OracleAS
         }
         
         x.getConnectBy().accept(this);
-        print(" START WITH ");
-        x.getStartWith().accept(this);
+
         return false;
     }
 

src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleExprParser.java

@@ -15,8 +15,10 @@
  */
 package com.alibaba.druid.sql.dialect.oracle.parser;
 
+import com.alibaba.druid.sql.ast.SQLExpr;
 import com.alibaba.druid.sql.ast.SQLOrderingSpecification;
 import com.alibaba.druid.sql.ast.expr.SQLIdentifierExpr;
+import com.alibaba.druid.sql.ast.expr.SQLVariantRefExpr;
 import com.alibaba.druid.sql.dialect.oracle.ast.OracleOrderBy;
 import com.alibaba.druid.sql.dialect.oracle.ast.expr.OracleAggregateExpr;
 import com.alibaba.druid.sql.dialect.oracle.ast.expr.OracleAnalytic;
@@ -55,6 +57,24 @@ public class OracleExprParser extends SQLExprParser {
         return false;
     }
 
+    public SQLExpr primary() throws ParserException {
+        final Token tok = lexer.token();
+
+        switch (tok) {
+            case COLON:
+                lexer.nextToken();
+                if (lexer.token() == Token.LITERAL_INT) {
+                    String name = ":" + lexer.numberString();
+                    lexer.nextToken();
+                    return new SQLVariantRefExpr(name);
+                } else{
+                    throw new ParserException("syntax error : " + lexer.token());
+                }
+            default:
+                return super.primary();
+        }
+    }
+
     @Override
     public OracleOrderBy parseOrderBy() {
         if (lexer.token() == (Token.ORDER)) {

src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleInsertParser.java

@@ -15,7 +15,7 @@
  */
 package com.alibaba.druid.sql.dialect.oracle.parser;
 
-import com.alibaba.druid.sql.ast.statement.SQLInsertStatement;
+import com.alibaba.druid.sql.ast.SQLStatement;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleInsertStatement;
 import com.alibaba.druid.sql.parser.Lexer;
 import com.alibaba.druid.sql.parser.ParserException;
@@ -32,7 +32,7 @@ public class OracleInsertParser extends SQLStatementParser {
         super(lexer);
     }
 
-    public SQLInsertStatement parseInsert() throws ParserException {
+    public SQLStatement parseInsert() throws ParserException {
         throw new ParserException("TODO");
     }
 

src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleSelectParser.java

@@ -36,6 +36,7 @@ import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectTableSource;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectUnPivot;
 import com.alibaba.druid.sql.parser.Lexer;
 import com.alibaba.druid.sql.parser.ParserException;
+import com.alibaba.druid.sql.parser.SQLExprParser;
 import com.alibaba.druid.sql.parser.SQLSelectParser;
 import com.alibaba.druid.sql.parser.Token;
 
@@ -48,6 +49,10 @@ public class OracleSelectParser extends SQLSelectParser {
     public OracleSelectParser(Lexer lexer){
         super(lexer);
     }
+    
+    protected SQLExprParser createExprParser() {
+        return new OracleExprParser(lexer);
+    }
 
     public OracleSelect select() {
         OracleSelect select = new OracleSelect();

src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleStatementParser.java

@@ -24,6 +24,7 @@ import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleCreateViewStatement;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OraclePLSQLCommitStatement;
 import com.alibaba.druid.sql.parser.Lexer;
 import com.alibaba.druid.sql.parser.ParserException;
+import com.alibaba.druid.sql.parser.SQLExprParser;
 import com.alibaba.druid.sql.parser.SQLStatementParser;
 import com.alibaba.druid.sql.parser.Token;
 
@@ -37,6 +38,10 @@ public class OracleStatementParser extends SQLStatementParser {
     public OracleStatementParser(Lexer lexer){
         super(lexer);
     }
+    
+    protected SQLExprParser createExprParser() {
+        return new OracleExprParser(lexer);
+    }
 
     @Override
     public void parseStatementList(List<SQLStatement> statementList) throws ParserException {