我遇到了一些唠叨。为了从我的一个 drupal SQL 数据库中获取一些数据，我需要一个相当精细的查询。问题是在控制台/MysqlWorkBench 中查询工作正常，而在我使用 JDBC 的 JAVA 程序中它根本不起作用。
原始查询是：
# Tag use from the perspective of all tag entries belonging to nodes in table 'field_data_field_topic'
SELECT fdf.entity_type, node.nid, td.name, td.tid, ti.created, users.uid
FROM field_data_field_topic fdf LEFT OUTER JOIN taxonomy_term_data td
ON(fdf.field_topic_tid = td.tid)
LEFT OUTER JOIN taxonomy_index ti
ON(fdf.field_topic_tid = ti.tid AND fdf.entity_id = ti.nid)
LEFT OUTER JOIN node
ON(fdf.entity_id = node.nid)
LEFT OUTER JOIN field_data_body fd
ON(fd.entity_id = node.nid)
LEFT OUTER JOIN users
ON(users.uid = node.uid)
#Restricting to content from 01-02-2012 up to 11-06-2012
WHERE node.created > 1328054400
#Restricting to either Nodes or Comments
AND fdf.entity_type = "node"
#Restricting to node status=1
AND node.status=1
#Remove defective node with nid=1594
AND node.nid not like "1594"
UNION
# Tag use from the perspective of all tag entries belonging to comments in table 'field_data_field_topic'
SELECT fdf.entity_type, comment.cid, td.name, td.tid, ti.created, users.uid
FROM field_data_field_topic fdf LEFT OUTER JOIN taxonomy_term_data td
ON(fdf.field_topic_tid = td.tid)
LEFT OUTER JOIN taxonomy_index ti
ON(fdf.field_topic_tid = ti.tid AND fdf.entity_id = ti.nid)
LEFT OUTER JOIN comment
ON(fdf.entity_id = comment.cid)
LEFT OUTER JOIN field_data_comment_body fc
ON(comment.cid=fc.entity_id)
LEFT OUTER JOIN users
ON(users.uid = comment.uid)
#Restricting to content from 01-02-2012 up to 11-06-2012
WHERE comment.created > 1328054400
#Restricting to Comments
AND fdf.entity_type = "comment"
#Restricting to node status=1
AND comment.status=1
在Java中，我放了：
String sql = "SELECT fdf.entity_type, node.nid, td.name, td.tid, ti.created, users.uid "
+ "FROM field_data_field_topic fdf LEFT OUTER JOIN taxonomy_term_data td " +
"ON(fdf.field_topic_tid = td.tid) " +
"LEFT OUTER JOIN taxonomy_index ti " +
"ON(fdf.field_topic_tid = ti.tid AND fdf.entity_id = ti.nid) " +
"LEFT OUTER JOIN node " +
"ON(fdf.entity_id = node.nid) " +
"LEFT OUTER JOIN field_data_body fd " +
"ON(fd.entity_id = node.nid) " +
"LEFT OUTER JOIN users " +
"ON(users.uid = node.uid " +
"WHERE node.created > 1328054400 " +
"AND fdf.entity_type = 'node' " +
"AND node.status = 1 " +
"AND node.nid not like '1594' " +
"UNION " +
"SELECT fdf.entity_type, comment.cid, td.name, td.tid, ti.created, users.uid " +
"FROM field_data_field_topic fdf LEFT OUTER JOIN taxonomy_term_data td " +
"ON(fdf.field_topic_tid = td.tid) " +
"LEFT OUTER JOIN taxonomy_index ti " +
"ON(fdf.field_topic_tid = ti.tid AND fdf.entity_id = ti.nid) " +
"LEFT OUTER JOIN comment " +
"ON(fdf.entity_id = comment.cid) " +
"LEFT OUTER JOIN field_data_comment_body fc " +
"ON(comment.cid=fc.entity_id) " +
"LEFT OUTER JOIN users " +
"ON(users.uid = comment.uid) " +
"WHERE comment.created > 1328054400 " +
"AND fdf.entity_type = 'comment' " +
"AND comment.status=1"
;
我得到的错误是：
MySQL Database connection established
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right **syntax to use near 'WHERE node.created > 1328054400 AND fdf.entity_type = "node" AND node.status = 1' at line 1**
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4096)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4028)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2490)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2683)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2144)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2310)
at pp.orientTest.Orient4GraphUsersCreatedTagsTaggedNodes.main(Orient4GraphUsersCreatedTagsTaggedNodes.java:51)
MySQL Database connection terminated