<h2 dir="auto">Question</h2>
<p dir="auto">My sharding-jdbc version is :4.0.0.RC2<br>
My execute sql is :show create table tb_a;<br>
The exception is ：<br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/9378228/63776816-aec22a00-c914-11e9-84f0-53b2bbf007a5.png"><img src="https://user-images.githubusercontent.com/9378228/63776816-aec22a00-c914-11e9-84f0-53b2bbf007a5.png" alt="image" style="max-width: 100%;"></a></p>
<p dir="auto">In my configuration, the tb_a is not sharding table.</p>
<p dir="auto">I have found out that, this is because the route result is null</p>
<p dir="auto">In the UnicastRouteEngine, the following code may return a RoutingResult just initialized with consturctor.</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/9378228/63776952-e630d680-c914-11e9-8087-9f625c870dec.png"><img src="https://user-images.githubusercontent.com/9378228/63776952-e630d680-c914-11e9-8087-9f625c870dec.png" alt="image" style="max-width: 100%;"></a></p>
<p dir="auto">So, what can I do to fix this question?</p>
<h2 dir="auto">Bug Report</h2>
<p dir="auto"><strong>For English only</strong>, other languages will not accept.</p>
<p dir="auto">Before report a bug, make sure you have:</p>
<ul dir="auto">
<li>Searched open and closed <a href="https://github.com/apache/incubator-shardingsphere/issues">GitHub issues</a>.</li>
<li>Read documentation: <a href="https://shardingsphere.apache.org/document/current/en/overview" rel="nofollow">ShardingSphere Doc</a>.</li>
</ul>
<p dir="auto">Please pay attention on issues you submitted, because we maybe need more details.<br>
If no response <strong>more than 7 days</strong> and we cannot reproduce it on current information, we will <strong>close it</strong>.</p>
<p dir="auto">Please answer these questions before submitting your issue. Thanks!</p>
<h3 dir="auto">Which version of ShardingSphere did you use?</h3>
<p dir="auto">4.0.0-RC3</p>
<h3 dir="auto">Which project did you use? Sharding-JDBC or Sharding-Proxy?</h3>
<p dir="auto">Sharding-JDBC</p>
<h3 dir="auto">Expected behavior</h3>
<p dir="auto">alter table successfully</p>
<h3 dir="auto">Actual behavior</h3>
<p dir="auto">Hibernate:<br>
when  field type is Bigdecimal<br>
alter table cc_v3_sydx.cc_manual_collect_record<br>
add column rfidNum decimal(19,2)<br>
line 3:30 mismatched input 'decimal' expecting {TRUNCATE, POSITION, VIEW, ANY, OFFSET, BEGIN, COMMIT, ROLLBACK, SAVEPOINT, BOOLEAN, DATE, TIME, TIMESTAMP, YEAR, QUARTER, MONTH, WEEK, DAY, HOUR, MINUTE, SECOND, MICROSECOND, MAX, MIN, SUM, COUNT, AVG, CURRENT, ENABLE, DISABLE, INSTANCE, DO, DEFINER, CASCADED, LOCAL, CLOSE, OPEN, NEXT, NAME, TYPE, TABLES, TABLESPACE, COLUMNS, FIELDS, INDEXES, STATUS, MODIFY, VALUE, DUPLICATE, FIRST, LAST, AFTER, OJ, ACCOUNT, USER, ROLE, START, TRANSACTION, WITHOUT, ESCAPE, SUBPARTITION, STORAGE, SUPER, TEMPORARY, THAN, UNBOUNDED, UPGRADE, VALIDATION, ROLLUP, SOUNDS, UNKNOWN, OFF, ALWAYS, COMMITTED, LEVEL, NO, PASSWORD, PRIVILEGES, ACTION, ALGORITHM, AUTOCOMMIT, BTREE, CHAIN, CHARSET, CHECKSUM, CIPHER, CLIENT, COALESCE, COMMENT, COMPACT, COMPRESSED, COMPRESSION, CONNECTION, CONSISTENT, DATA, DISCARD, DISK, ENCRYPTION, END, ENGINE, EVENT, EXCHANGE, EXECUTE, FILE, FIXED, FOLLOWING, GLOBAL, HASH, IMPORT_, LESS, MEMORY, NONE, PARSER, PARTIAL, PARTITIONING, PERSIST, PRECEDING, PROCESS, PROXY, QUICK, REBUILD, REDUNDANT, RELOAD, REMOVE, REORGANIZE, REPAIR, REVERSE, SESSION, SHUTDOWN, SIMPLE, SLAVE, VISIBLE, INVISIBLE, ENFORCED, AGAINST, LANGUAGE, MODE, QUERY, EXTENDED, EXPANSION, VARIANCE, MAX_ROWS, MIN_ROWS, SQL_BIG_RESULT, SQL_BUFFER_RESULT, SQL_CACHE, SQL_NO_CACHE, STATS_AUTO_RECALC, STATS_PERSISTENT, STATS_SAMPLE_PAGES, ROW_FORMAT, WEIGHT_STRING, COLUMN_FORMAT, INSERT_METHOD, KEY_BLOCK_SIZE, PACK_KEYS, PERSIST_ONLY, BIT_AND, BIT_OR, BIT_XOR, GROUP_CONCAT, JSON_ARRAYAGG, JSON_OBJECTAGG, STD, STDDEV, STDDEV_POP, STDDEV_SAMP, VAR_POP, VAR_SAMP, AUTO_INCREMENT, AVG_ROW_LENGTH, DELAY_KEY_WRITE, ROTATE, MASTER, BINLOG, ERROR, SCHEDULE, COMPLETION, EVERY, HOST, SOCKET, PORT, SERVER, WRAPPER, OPTIONS, OWNER, RETURNS, CONTAINS, SECURITY, INVOKER, TEMPTABLE, MERGE, UNDEFINED, DATAFILE, FILE_BLOCK_SIZE, EXTENT_SIZE, INITIAL_SIZE, AUTOEXTEND_SIZE, MAX_SIZE, NODEGROUP, WAIT, LOGFILE, UNDOFILE, UNDO_BUFFER_SIZE, REDO_BUFFER_SIZE, HANDLER, PREV, ORGANIZATION, DEFINITION, DESCRIPTION, REFERENCE, FOLLOWS, PRECEDES, IMPORT, CONCURRENT, XML, DUMPFILE, SHARE, CODE, CONTEXT, CLONE, AGGREGATE, INSTALL, UNINSTALL, RESOURCE, EXPIRE, NEVER, HISTORY, OPTIONAL, REUSE, MAX_QUERIES_PER_HOUR, MAX_UPDATES_PER_HOUR, MAX_CONNECTIONS_PER_HOUR, MAX_USER_CONNECTIONS, RETAIN, RANDOM, OLD, ISSUER, SUBJECT, CACHE, GENERAL, SLOW, USER_RESOURCES, EXPORT, RELAY, HOSTS, FLUSH, RESET, RESTART, UNIX_TIMESTAMP, LOWER, UPPER, IDENTIFIER_}<br>
line 3:41 mismatched input '2' expecting {ALTER, DROP, TRUNCATE, ADD, INDEX, WITH, UNION, ORDER, CHAR, CHARACTER, DEFAULT, ENABLE, DISABLE, TABLESPACE, MODIFY, WITHOUT, UPGRADE, CHECK, PASSWORD, ALGORITHM, ANALYZE, CHANGE, CHECKSUM, COALESCE, COLLATE, COMMENT, COMPRESSION, CONNECTION, CONVERT, DATA, DISCARD, ENCRYPTION, ENGINE, EXCHANGE, FORCE, IMPORT_, LOCK, OPTIMIZE, REBUILD, REMOVE, RENAME, REORGANIZE, REPAIR, MAX_ROWS, MIN_ROWS, STATS_AUTO_RECALC, STATS_PERSISTENT, STATS_SAMPLE_PAGES, ROW_FORMAT, INSERT_METHOD, KEY_BLOCK_SIZE, PACK_KEYS, AUTO_INCREMENT, AVG_ROW_LENGTH, DELAY_KEY_WRITE}<br>
2020-02-21 23:36:11.071 [main] ERROR org.springframework.boot.SpringApplication -<br>
Application startup failed</p>
<p dir="auto">when  field type is  Integer:<br>
Hibernate:</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="alter table cc_v3_sydx.cc_manual_collect_record 
   add column rfidNumInt integer"><pre class="notranslate"><code class="notranslate">alter table cc_v3_sydx.cc_manual_collect_record 
   add column rfidNumInt integer
</code></pre></div>
<p dir="auto">line 3:29 mismatched input 'integer' expecting {TRUNCATE, POSITION, VIEW, ANY, OFFSET, BEGIN, COMMIT, ROLLBACK, SAVEPOINT, BOOLEAN, DATE, TIME, TIMESTAMP, YEAR, QUARTER, MONTH, WEEK, DAY, HOUR, MINUTE, SECOND, MICROSECOND, MAX, MIN, SUM, COUNT, AVG, CURRENT, ENABLE, DISABLE, INSTANCE, DO, DEFINER, CASCADED, LOCAL, CLOSE, OPEN, NEXT, NAME, TYPE, TABLES, TABLESPACE, COLUMNS, FIELDS, INDEXES, STATUS, MODIFY, VALUE, DUPLICATE, FIRST, LAST, AFTER, OJ, ACCOUNT, USER, ROLE, START, TRANSACTION, WITHOUT, ESCAPE, SUBPARTITION, STORAGE, SUPER, TEMPORARY, THAN, UNBOUNDED, UPGRADE, VALIDATION, ROLLUP, SOUNDS, UNKNOWN, OFF, ALWAYS, COMMITTED, LEVEL, NO, PASSWORD, PRIVILEGES, ACTION, ALGORITHM, AUTOCOMMIT, BTREE, CHAIN, CHARSET, CHECKSUM, CIPHER, CLIENT, COALESCE, COMMENT, COMPACT, COMPRESSED, COMPRESSION, CONNECTION, CONSISTENT, DATA, DISCARD, DISK, ENCRYPTION, END, ENGINE, EVENT, EXCHANGE, EXECUTE, FILE, FIXED, FOLLOWING, GLOBAL, HASH, IMPORT_, LESS, MEMORY, NONE, PARSER, PARTIAL, PARTITIONING, PERSIST, PRECEDING, PROCESS, PROXY, QUICK, REBUILD, REDUNDANT, RELOAD, REMOVE, REORGANIZE, REPAIR, REVERSE, SESSION, SHUTDOWN, SIMPLE, SLAVE, VISIBLE, INVISIBLE, ENFORCED, AGAINST, LANGUAGE, MODE, QUERY, EXTENDED, EXPANSION, VARIANCE, MAX_ROWS, MIN_ROWS, SQL_BIG_RESULT, SQL_BUFFER_RESULT, SQL_CACHE, SQL_NO_CACHE, STATS_AUTO_RECALC, STATS_PERSISTENT, STATS_SAMPLE_PAGES, ROW_FORMAT, WEIGHT_STRING, COLUMN_FORMAT, INSERT_METHOD, KEY_BLOCK_SIZE, PACK_KEYS, PERSIST_ONLY, BIT_AND, BIT_OR, BIT_XOR, GROUP_CONCAT, JSON_ARRAYAGG, JSON_OBJECTAGG, STD, STDDEV, STDDEV_POP, STDDEV_SAMP, VAR_POP, VAR_SAMP, AUTO_INCREMENT, AVG_ROW_LENGTH, DELAY_KEY_WRITE, ROTATE, MASTER, BINLOG, ERROR, SCHEDULE, COMPLETION, EVERY, HOST, SOCKET, PORT, SERVER, WRAPPER, OPTIONS, OWNER, RETURNS, CONTAINS, SECURITY, INVOKER, TEMPTABLE, MERGE, UNDEFINED, DATAFILE, FILE_BLOCK_SIZE, EXTENT_SIZE, INITIAL_SIZE, AUTOEXTEND_SIZE, MAX_SIZE, NODEGROUP, WAIT, LOGFILE, UNDOFILE, UNDO_BUFFER_SIZE, REDO_BUFFER_SIZE, HANDLER, PREV, ORGANIZATION, DEFINITION, DESCRIPTION, REFERENCE, FOLLOWS, PRECEDES, IMPORT, CONCURRENT, XML, DUMPFILE, SHARE, CODE, CONTEXT, CLONE, AGGREGATE, INSTALL, UNINSTALL, RESOURCE, EXPIRE, NEVER, HISTORY, OPTIONAL, REUSE, MAX_QUERIES_PER_HOUR, MAX_UPDATES_PER_HOUR, MAX_CONNECTIONS_PER_HOUR, MAX_USER_CONNECTIONS, RETAIN, RANDOM, OLD, ISSUER, SUBJECT, CACHE, GENERAL, SLOW, USER_RESOURCES, EXPORT, RELAY, HOSTS, FLUSH, RESET, RESTART, UNIX_TIMESTAMP, LOWER, UPPER, IDENTIFIER_}<br>
2020-02-21 23:45:14.558 [main] ERROR org.springframework.boot.SpringApplication -<br>
Application startup failed</p>
<p dir="auto">when  field type is  Double:</p>
<p dir="auto">Hibernate:</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="alter table cc_v3_sydx.cc_manual_collect_record 
   add column rfidNumInt double precision"><pre class="notranslate"><code class="notranslate">alter table cc_v3_sydx.cc_manual_collect_record 
   add column rfidNumInt double precision
</code></pre></div>
<p dir="auto">line 3:29 mismatched input 'double' expecting {TRUNCATE, POSITION, VIEW, ANY, OFFSET, BEGIN, COMMIT, ROLLBACK, SAVEPOINT, BOOLEAN, DATE, TIME, TIMESTAMP, YEAR, QUARTER, MONTH, WEEK, DAY, HOUR, MINUTE, SECOND, MICROSECOND, MAX, MIN, SUM, COUNT, AVG, CURRENT, ENABLE, DISABLE, INSTANCE, DO, DEFINER, CASCADED, LOCAL, CLOSE, OPEN, NEXT, NAME, TYPE, TABLES, TABLESPACE, COLUMNS, FIELDS, INDEXES, STATUS, MODIFY, VALUE, DUPLICATE, FIRST, LAST, AFTER, OJ, ACCOUNT, USER, ROLE, START, TRANSACTION, WITHOUT, ESCAPE, SUBPARTITION, STORAGE, SUPER, TEMPORARY, THAN, UNBOUNDED, UPGRADE, VALIDATION, ROLLUP, SOUNDS, UNKNOWN, OFF, ALWAYS, COMMITTED, LEVEL, NO, PASSWORD, PRIVILEGES, ACTION, ALGORITHM, AUTOCOMMIT, BTREE, CHAIN, CHARSET, CHECKSUM, CIPHER, CLIENT, COALESCE, COMMENT, COMPACT, COMPRESSED, COMPRESSION, CONNECTION, CONSISTENT, DATA, DISCARD, DISK, ENCRYPTION, END, ENGINE, EVENT, EXCHANGE, EXECUTE, FILE, FIXED, FOLLOWING, GLOBAL, HASH, IMPORT_, LESS, MEMORY, NONE, PARSER, PARTIAL, PARTITIONING, PERSIST, PRECEDING, PROCESS, PROXY, QUICK, REBUILD, REDUNDANT, RELOAD, REMOVE, REORGANIZE, REPAIR, REVERSE, SESSION, SHUTDOWN, SIMPLE, SLAVE, VISIBLE, INVISIBLE, ENFORCED, AGAINST, LANGUAGE, MODE, QUERY, EXTENDED, EXPANSION, VARIANCE, MAX_ROWS, MIN_ROWS, SQL_BIG_RESULT, SQL_BUFFER_RESULT, SQL_CACHE, SQL_NO_CACHE, STATS_AUTO_RECALC, STATS_PERSISTENT, STATS_SAMPLE_PAGES, ROW_FORMAT, WEIGHT_STRING, COLUMN_FORMAT, INSERT_METHOD, KEY_BLOCK_SIZE, PACK_KEYS, PERSIST_ONLY, BIT_AND, BIT_OR, BIT_XOR, GROUP_CONCAT, JSON_ARRAYAGG, JSON_OBJECTAGG, STD, STDDEV, STDDEV_POP, STDDEV_SAMP, VAR_POP, VAR_SAMP, AUTO_INCREMENT, AVG_ROW_LENGTH, DELAY_KEY_WRITE, ROTATE, MASTER, BINLOG, ERROR, SCHEDULE, COMPLETION, EVERY, HOST, SOCKET, PORT, SERVER, WRAPPER, OPTIONS, OWNER, RETURNS, CONTAINS, SECURITY, INVOKER, TEMPTABLE, MERGE, UNDEFINED, DATAFILE, FILE_BLOCK_SIZE, EXTENT_SIZE, INITIAL_SIZE, AUTOEXTEND_SIZE, MAX_SIZE, NODEGROUP, WAIT, LOGFILE, UNDOFILE, UNDO_BUFFER_SIZE, REDO_BUFFER_SIZE, HANDLER, PREV, ORGANIZATION, DEFINITION, DESCRIPTION, REFERENCE, FOLLOWS, PRECEDES, IMPORT, CONCURRENT, XML, DUMPFILE, SHARE, CODE, CONTEXT, CLONE, AGGREGATE, INSTALL, UNINSTALL, RESOURCE, EXPIRE, NEVER, HISTORY, OPTIONAL, REUSE, MAX_QUERIES_PER_HOUR, MAX_UPDATES_PER_HOUR, MAX_CONNECTIONS_PER_HOUR, MAX_USER_CONNECTIONS, RETAIN, RANDOM, OLD, ISSUER, SUBJECT, CACHE, GENERAL, SLOW, USER_RESOURCES, EXPORT, RELAY, HOSTS, FLUSH, RESET, RESTART, UNIX_TIMESTAMP, LOWER, UPPER, IDENTIFIER_}<br>
2020-02-21 23:46:21.119 [main] ERROR org.springframework.boot.SpringApplication -<br>
Application startup failed</p>
<h3 dir="auto">Reason analyze (If you can)</h3>
<p dir="auto">Similar to this question：<br>
<a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="462558017" data-permission-text="Title is private" data-url="https://github.com/apache/shardingsphere/issues/2632" data-hovercard-type="issue" data-hovercard-url="/apache/shardingsphere/issues/2632/hovercard" href="https://github.com/apache/shardingsphere/issues/2632#issue-462558017">#2632 (comment)</a></p>
<h3 dir="auto">Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc.</h3>
<h3 dir="auto">Example codes for reproduce this issue (such as a github link).</h3>