修复type不能作为别名 char()方法解析失败的问题

src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlExprParser.java

@@ -415,7 +415,7 @@ public class MySqlExprParser extends SQLExprParser {
                 expr = matchAgainstExpr;
 
                 return primaryRest(expr);
-            } else if ("CONVERT".equalsIgnoreCase(ident)) {
+            } else if (("CONVERT".equalsIgnoreCase(ident))||("CHAR".equalsIgnoreCase(ident))) {
                 lexer.nextToken();
                 SQLMethodInvokeExpr methodInvokeExpr = new SQLMethodInvokeExpr(ident);
 

src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlOutputVisitor.java

@@ -709,7 +709,7 @@ public class MySqlOutputVisitor extends SQLASTOutputVisitor implements MySqlASTV
             return false;
         }
 
-        if ("CONVERT".equalsIgnoreCase(x.getMethodName())) {
+        if (("CONVERT".equalsIgnoreCase(x.getMethodName()))||"CHAR".equalsIgnoreCase(x.getMethodName())) {
             if (x.getOwner() != null) {
                 x.getOwner().accept(this);
                 print(".");

src/main/java/com/alibaba/druid/sql/parser/SQLParser.java

@@ -142,6 +142,7 @@ public class SQLParser {
                     case EXCLUSIVE:
                     case MODE:
                     case ADVISE:
+                    case TYPE:
                         alias = lexer.stringVal();
                         lexer.nextToken();
                         return alias;

src/test/java/com/alibaba/druid/bvt/sql/mysql/MySqlTest_Char.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.druid.bvt.sql.mysql;
+
+import com.alibaba.druid.sql.MysqlTest;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
+
+import java.util.List;
+/**
+*测试char()  CHAR(N,... [USING charset_name])
+*/
+public class MySqlTest_Char extends MysqlTest {
+
+    public void test_0() throws Exception {
+        String sql = "SELECT char(888 using utf8)";
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        print(statementList);
+        assertEquals(output(statementList),"SELECT char(888 USING utf8)");
+    }
+    public void test_1() throws Exception {
+        String sql = "SELECT char('abc8a9b10c' using utf8)";
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        print(statementList);
+        assertEquals(output(statementList),"SELECT char('abc8a9b10c' USING utf8)");
+    }
+
+    public void test_2() throws Exception {
+        String sql = "SELECT char(12,321,'lq9s9f','abc8a9b10c' using utf8)";
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        print(statementList);
+        assertEquals(output(statementList),"SELECT char(12, 321, 'lq9s9f', 'abc8a9b10c' USING utf8)");
+    }
+
+    public void test_3() throws Exception {
+        String sql = "SELECT char(12,321,'lq9s9f','abc8a9b10c')";
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        print(statementList);
+        assertEquals(output(statementList),"SELECT char(12, 321, 'lq9s9f', 'abc8a9b10c')");
+    }
+
+    public void test_4() throws Exception {
+        String sql = "SELECT CHAR(77,121,83,81,'76' using utf8)";
+        MySqlStatementParser parser = new MySqlStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        print(statementList);
+        assertEquals(output(statementList),"SELECT CHAR(77, 121, 83, 81, '76' USING utf8)");
+    }
+}

src/test/java/com/alibaba/druid/bvt/sql/postgresql/expr/AliasTest_Type.java

@@ -0,0 +1,26 @@
+package com.alibaba.druid.bvt.sql.postgresql.expr;
+import com.alibaba.druid.sql.PGTest;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.postgresql.parser.PGSQLStatementParser;
+import com.alibaba.druid.sql.dialect.postgresql.visitor.PGSchemaStatVisitor;
+import com.alibaba.druid.sql.visitor.ParameterizedOutputVisitorUtils;
+import com.alibaba.druid.util.JdbcUtils;
+import org.junit.Assert;
+import java.util.List;
+/**
+ *测试 TYPE作为别名
+ */
+public class AliasTest_Type extends PGTest {
+    public void test_timestamp() throws Exception {
+        String sql = "select column1 as TYPE from table1 where xx=1";
+        PGSQLStatementParser parser = new PGSQLStatementParser(sql);
+        List<SQLStatement> statementList = parser.parseStatementList();
+        SQLStatement statemen = statementList.get(0);
+        print(statementList);
+        Assert.assertEquals(1, statementList.size());
+        PGSchemaStatVisitor visitor = new PGSchemaStatVisitor();
+        statemen.accept(visitor);
+        String mergedSql = ParameterizedOutputVisitorUtils.parameterize(sql, JdbcUtils.POSTGRESQL);
+        System.out.println(mergedSql);
+    }
+}