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Posted to issues@flink.apache.org by "Zhenghua Gao (Jira)" <ji...@apache.org> on 2019/12/31 08:50:00 UTC
[jira] [Closed] (FLINK-15379) JDBC connector return wrong value if
defined dataType contains precision
[ https://issues.apache.org/jira/browse/FLINK-15379?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zhenghua Gao closed FLINK-15379.
--------------------------------
Resolution: Cannot Reproduce
> JDBC connector return wrong value if defined dataType contains precision
> ------------------------------------------------------------------------
>
> Key: FLINK-15379
> URL: https://issues.apache.org/jira/browse/FLINK-15379
> Project: Flink
> Issue Type: Bug
> Components: Connectors / JDBC, Table SQL / Planner
> Affects Versions: 1.10.0
> Reporter: Leonard Xu
> Priority: Major
> Fix For: 1.10.0
>
>
> A mysql table like:
>
> {code:java}
> // CREATE TABLE `currency` (
> `currency_id` bigint(20) NOT NULL,
> `currency_name` varchar(200) DEFAULT NULL,
> `rate` double DEFAULT NULL,
> `currency_time` timestamp NULL DEFAULT CURRENT_TIMESTAMP,
> `country` varchar(100) DEFAULT NULL,
> `timestamp6` timestamp(6) NULL DEFAULT NULL,
> `time6` time(6) DEFAULT NULL,
> `gdp` decimal(10,4) DEFAULT NULL,
> PRIMARY KEY (`currency_id`)
> ) ENGINE=InnoDB DEFAULT CHARSET=utf8
> +-------------+---------------+------+---------------------+---------+----------------------------+-----------------+----------+
> | currency_id | currency_name | rate | currency_time | country | timestamp6 | time6 | gdp |
> +-------------+---------------+------+---------------------+---------+----------------------------+-----------------+----------+
> | 1 | US Dollar | 1020 | 2019-12-20 17:23:00 | America | 2019-12-20 12:22:00.023456 | 12:22:00.023456 | 100.0112 |
> | 2 | Euro | 114 | 2019-12-20 12:22:00 | Germany | 2019-12-20 12:22:00.023456 | 12:22:00.023456 | 100.0112 |
> | 3 | RMB | 16 | 2019-12-20 12:22:00 | China | 2019-12-20 12:22:00.023456 | 12:22:00.023456 | 100.0112 |
> | 4 | Yen | 1 | 2019-12-20 12:22:00 | Japan | 2019-12-20 12:22:00.123456 | 12:22:00.123456 | 100.4112 |
> +-------------+---------------+------+---------------------+---------+----------------------------+-----------------+----------+{code}
>
> If user defined a jdbc table as dimension table like:
>
> {code:java}
> //
> public static final String mysqlCurrencyDDL = "CREATE TABLE currency (\n" +
> " currency_id BIGINT,\n" +
> " currency_name STRING,\n" +
> " rate DOUBLE,\n" +
> " currency_time TIMESTAMP(3),\n" +
> " country STRING,\n" +
> " timestamp6 TIMESTAMP(6),\n" +
> " time6 TIME(6),\n" +
> " gdp DECIMAL(10, 4)\n" +
> ") WITH (\n" +
> " 'connector.type' = 'jdbc',\n" +
> " 'connector.url' = 'jdbc:mysql://localhost:3306/test',\n" +
> " 'connector.username' = 'root'," +
> " 'connector.table' = 'currency',\n" +
> " 'connector.driver' = 'com.mysql.jdbc.Driver',\n" +
> " 'connector.lookup.cache.max-rows' = '500', \n" +
> " 'connector.lookup.cache.ttl' = '10s',\n" +
> " 'connector.lookup.max-retries' = '3'" +
> ")";
> {code}
>
> User will get wrong value in column `timestamp6`,`time6`,`gdp`:
> {code:java}
> // c.currency_id, c.currency_name, c.rate, c.currency_time, c.country, c.timestamp6, c.time6, c.gdp
> 1,US Dollar,1020.0,2019-12-20T17:23,America,2019-12-20T12:22:00.023456,12:22,-0.0001
> 2,Euro,114.0,2019-12-20T12:22,Germany,2019-12-20T12:22:00.023456,12:22,-0.0001
> 4,Yen,1.0,2019-12-20T12:22,Japan,2019-12-20T12:22:00.123456,12:22,-0.0001{code}
>
>
> {code:java}
> public class JDBCSourceExample {
> public static void main(String[] args) throws Exception {
> StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
> env.setParallelism(1);
> EnvironmentSettings envSettings = EnvironmentSettings.newInstance()
> .useBlinkPlanner()
> .inStreamingMode()
> .build();
> StreamTableEnvironment tableEnvironment = StreamTableEnvironment.create(env, envSettings);
> String mysqlCurrencyDDL = "CREATE TABLE currency (\n" +
> " currency_id BIGINT,\n" +
> " currency_name STRING,\n" +
> " rate DOUBLE,\n" +
> " currency_time TIMESTAMP(3),\n" +
> " country STRING,\n" +
> " timestamp6 TIMESTAMP(6),\n" +
> " time6 TIME(6),\n" +
> " gdp DECIMAL(10, 4)\n" +
> ") WITH (\n" +
> " 'connector.type' = 'jdbc',\n" +
> " 'connector.url' = 'jdbc:mysql://localhost:3306/test',\n" +
> " 'connector.username' = 'root'," +
> " 'connector.table' = 'currency',\n" +
> " 'connector.driver' = 'com.mysql.jdbc.Driver',\n" +
> " 'connector.lookup.cache.max-rows' = '500', \n" +
> " 'connector.lookup.cache.ttl' = '10s',\n" +
> " 'connector.lookup.max-retries' = '3'" +
> ")";
> tableEnvironment.sqlUpdate(mysqlCurrencyDDL);
> String querySQL = "select * from currency";
> tableEnvironment.toAppendStream(tableEnvironment.sqlQuery(querySQL), Row.class).print();
> tableEnvironment.execute("JdbcExample");
> }
> }
> {code}
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