bug fixed for MySqlParameterizedOutputVisitor sharding support.

src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java

@@ -654,6 +654,24 @@ public class SQLASTOutputVisitor extends SQLASTVisitorAdapter implements Paramet
                         break;
                     }
                 }
+
+                if (isNumber) {
+                    int pos2 = name.lastIndexOf('_', pos - 1);
+                    if (pos2 != -1) {
+                        boolean isNumber2 = true;
+                        for (int i = pos2 + 1; i < pos; ++i) {
+                            char ch = name.charAt(i);
+                            if (ch < '0' || ch > '9') {
+                                isNumber2 = false;
+                                break;
+                            }
+                        }
+                        if (isNumber2) {
+                            pos = pos2;
+                        }
+                    }
+                }
+
                 if (isNumber) {
                     boolean isAlias = false;
                     for (SQLObject parent = x.getParent();parent != null; parent = parent.getParent()) {

src/test/java/com/alibaba/druid/bvt/sql/mysql/param/MySqlParameterizedOutputVisitorTest_37.java

@@ -0,0 +1,36 @@
+package com.alibaba.druid.bvt.sql.mysql.param;
+
+import com.alibaba.druid.sql.SQLUtils;
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.parser.SQLParserUtils;
+import com.alibaba.druid.sql.parser.SQLStatementParser;
+import com.alibaba.druid.sql.visitor.SQLASTOutputVisitor;
+import com.alibaba.druid.util.JdbcConstants;
+import junit.framework.TestCase;
+
+import java.util.List;
+
+/**
+ * Created by wenshao on 16/8/23.
+ */
+public class MySqlParameterizedOutputVisitorTest_37 extends TestCase {
+    public void test_for_parameterize() throws Exception {
+        final String dbType = JdbcConstants.MYSQL;
+        String sql = "insert into fc_sms_0011_201704 (c1, c2, c3) values (1, 'a', 'b')";
+
+        SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, dbType);
+        List<SQLStatement> stmtList = parser.parseStatementList();
+        SQLStatement statement = stmtList.get(0);
+
+        StringBuilder out = new StringBuilder();
+        //  List<Object> parameters = new ArrayList<Object>();
+        SQLASTOutputVisitor visitor = SQLUtils.createOutputVisitor(out, JdbcConstants.MYSQL);
+        visitor.setParameterized(true);
+        visitor.setParameterizedMergeInList(true);
+        //   visitor.setParameters(parameters);
+        visitor.setExportTables(true);
+        visitor.setPrettyFormat(false);
+        statement.accept(visitor);
+        assertEquals("INSERT INTO fc_sms (c1, c2, c3) VALUES (?, ?, ?)", out.toString());
+    }
+}