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Posted to dev@shardingsphere.apache.org by GitBox <gi...@apache.org> on 2019/04/24 13:49:09 UTC
[GitHub] [incubator-shardingsphere] AlbertTao opened a new issue #2263: Must have sharding column with subquery error occurred when use “exists”.
AlbertTao opened a new issue #2263: Must have sharding column with subquery error occurred when use “exists”.
URL: https://github.com/apache/incubator-shardingsphere/issues/2263
## Must have sharding column with subquery error occurred when use “exists”.
When execute sql as follow :
```mysql
select * from ts_order td where exists (select 1 from ts_order_address tda where tda.order_id = 1);
```
Get error : Must have sharding column with subquery.
### Which version of ShardingSphere did you use?
4.0.0-RC1
### Which project did you use? Sharding-JDBC or Sharding-Proxy?
Sharding-JDBC
### Expected behavior
When I use version 3.0.1 get result without error :
```txt
[main] INFO ShardingSphere-SQL - Actual SQL: ds_0 ::: select * from ts_order_0000 td where exists (select 1 from ts_order_address_0000 tda where tda.order_id = 1);
[main] INFO ShardingSphere-SQL - Actual SQL: ds_0 ::: select * from ts_order_0001 td where exists (select 1 from ts_order_address_0001 tda where tda.order_id = 1);
[main] INFO ShardingSphere-SQL - Actual SQL: ds_1 ::: select * from ts_order_0002 td where exists (select 1 from ts_order_address_0002 tda where tda.order_id = 1);
[main] INFO ShardingSphere-SQL - Actual SQL: ds_1 ::: select * from ts_order_0003 td where exists (select 1 from ts_order_address_0003 tda where tda.order_id = 1);
------------------------------------------------------------
id
1
------------------------------------------------------------
```
### Actual behavior
```txt
Exception in thread "main" java.lang.IllegalStateException: Must have sharding column with subquery.
```
### Reason analyze (If you can)
### Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc.
**Dependency**
```xml
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.9</version>
</dependency>
<dependency>
<groupId>org.apache.shardingsphere</groupId>
<artifactId>sharding-jdbc-core</artifactId>
<version>4.0.0-RC1</version>
</dependency>
```
**SQL**
```sql
-- prepare schemas
create database test_d_0;
create database test_d_1;
-- prepare tables
-- prepare table ts_order
CREATE TABLE test_d_0.`ts_order_0000` (`id` BIGINT NOT NULL AUTO_INCREMENT,PRIMARY KEY (`id`));
CREATE TABLE test_d_0.`ts_order_0001` (`id` BIGINT NOT NULL AUTO_INCREMENT,PRIMARY KEY (`id`));
CREATE TABLE test_d_1.`ts_order_0002` (`id` BIGINT NOT NULL AUTO_INCREMENT,PRIMARY KEY (`id`));
CREATE TABLE test_d_1.`ts_order_0003` (`id` BIGINT NOT NULL AUTO_INCREMENT,PRIMARY KEY (`id`));
-- prepare table ts_order_address
CREATE TABLE `test_d_0`.`ts_order_address_0000` ( `id` BIGINT NOT NULL AUTO_INCREMENT, `order_id` BIGINT NOT NULL, `address` VARCHAR(255) NULL, PRIMARY KEY (`id`));
CREATE TABLE `test_d_0`.`ts_order_address_0001` ( `id` BIGINT NOT NULL AUTO_INCREMENT, `order_id` BIGINT NOT NULL, `address` VARCHAR(255) NULL, PRIMARY KEY (`id`));
CREATE TABLE `test_d_1`.`ts_order_address_0002` ( `id` BIGINT NOT NULL AUTO_INCREMENT, `order_id` BIGINT NOT NULL, `address` VARCHAR(255) NULL, PRIMARY KEY (`id`));
CREATE TABLE `test_d_1`.`ts_order_address_0003` ( `id` BIGINT NOT NULL AUTO_INCREMENT, `order_id` BIGINT NOT NULL, `address` VARCHAR(255) NULL, PRIMARY KEY (`id`));
-- prepare init data
INSERT INTO `test_d_0`.`ts_order_0001` (`id`) VALUES ('1');
INSERT INTO `test_d_0`.`ts_order_address_0001` (`id`, `order_id`, `address`) VALUES ('1', '1', 'china');
```
**Java Code**
```java
// ignore package and import
public static void main(String[] args) throws Exception {
queryTest("sharding-config-subquery-test2.yaml",
"select * from ts_order td where exists (select 1 from ts_order_address tda where tda.order_id = 1);");
}
private static void queryTest(String conifgResourcePath, String querySql) throws Exception {
String shardingConfig = loadFromResource(conifgResourcePath);
DataSource dataSource = YamlShardingDataSourceFactory.createDataSource(shardingConfig.getBytes("utf-8"));
Connection connection = dataSource.getConnection();
Statement st = connection.createStatement();
ResultSet rs = st.executeQuery(querySql);
showData(rs);
connection.close();
}
private static String loadFromResource(String path) throws Exception{
BufferedReader reader = new BufferedReader(new InputStreamReader(Class.class
.getResourceAsStream("/" + path), "utf-8"));
StringBuffer sb = new StringBuffer();
CharBuffer charBuffer = CharBuffer.allocate(1024);
for (int count = reader.read(charBuffer); count > 0; count = reader.read(charBuffer)) {
sb.append(charBuffer.flip());
}
return sb.toString();
}
private static void showData(ResultSet rs) throws SQLException {
System.out.println("------------------------------------------------------------");
int colCount = rs.getMetaData().getColumnCount();
for (int i = 0; i < colCount; i++) {
System.out.print(String.format("%-20s", rs.getMetaData().getColumnName(i + 1)));
}
System.out.println();
int dataCount = 0;
while (rs.next()) {
dataCount++;
for (int i = 0; i < colCount; i++) {
System.out.print(String.format("%-20s", rs.getObject(i + 1) + " "));
}
System.out.println();
}
System.out.println("------------------------------------------------------------");
System.out.println("Get Data rows " + dataCount);
}
```
**Sharding Rule**
sharding-config-subquery-test2.yaml
```yaml
dataSources:
ds_0: !!com.alibaba.druid.pool.DruidDataSource
driverClassName: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/test_d_0
username: root
password: root135
ds_1: !!com.alibaba.druid.pool.DruidDataSource
driverClassName: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/test_d_1
username: root
password: root135
shardingRule:
tables:
ts_order:
actualDataNodes: ds_0.ts_order_000${0..1},ds_1.ts_order_000${2..3}
databaseStrategy:
inline:
shardingColumn: id
algorithmExpression: ds_${new BigDecimal(id).abs().divideAndRemainder(4)[1].longValue().intdiv(2)}
tableStrategy:
inline:
shardingColumn: id
algorithmExpression: ts_order_${String.format("%04d",new BigDecimal(id).abs().divideAndRemainder(4)[1].longValue())}
ts_order_address:
actualDataNodes: ds_0.ts_order_address_000${0..1},ds_1.ts_order_address_000${2..3}
databaseStrategy:
inline:
shardingColumn: order_id
algorithmExpression: ds_${new BigDecimal(order_id).abs().divideAndRemainder(4)[1].longValue().intdiv(2)}
tableStrategy:
inline:
shardingColumn: order_id
algorithmExpression: ts_order_address_${String.format("%04d",new BigDecimal(order_id).abs().divideAndRemainder(4)[1].longValue())}
bindingTables:
- ts_order, ts_order_address
props:
sql.show: true
```
### Example codes for reproduce this issue (such as a github link).
----------------------------------------------------------------
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