xiongmaodeguxiang opened a new issue, #20679:
URL: https://github.com/apache/shardingsphere/issues/20679
using shardingsphere-jdbc 5.0.0
hashShardingValue in HashModShardingAlgorithm like this
`private long hashShardingValue(final Comparable<?> shardingValue) {
return Math.abs((long) shardingValue.hashCode());
}`
When using snowflake algorithm, shardingValue is a Long type, the same Long
value will be different hashcodes, so when using BindingTableGroups, the
associated table query will not be able to query data
Configuration is as follows
` ShardingRuleConfiguration ruleConfiguration = new
ShardingRuleConfiguration();
ruleConfiguration.getBindingTableGroups().add("t_order,t_order_item");
ShardingTableRuleConfiguration tableRuleConfiguration = new
ShardingTableRuleConfiguration("t_user","ds$->{0..1}.t_user_$->{0..3}");
tableRuleConfiguration.setDatabaseShardingStrategy(new
StandardShardingStrategyConfiguration("user_id","db_mode_algorithm"));
tableRuleConfiguration.setTableShardingStrategy(new
StandardShardingStrategyConfiguration("user_id","tab_mode_algorithm"));
ShardingTableRuleConfiguration orderTableRuleConfiguration = new
ShardingTableRuleConfiguration("t_order","ds$->{0..1}.t_order_$->{0..3}");
orderTableRuleConfiguration.setDatabaseShardingStrategy(new
StandardShardingStrategyConfiguration("order_id","db_mode_algorithm"));
orderTableRuleConfiguration.setTableShardingStrategy(new
StandardShardingStrategyConfiguration("order_id","tab_mode_algorithm"));
orderTableRuleConfiguration.setKeyGenerateStrategy(new
KeyGenerateStrategyConfiguration("order_id","snowflake"));
ShardingTableRuleConfiguration orderItemTableRuleConfiguration = new
ShardingTableRuleConfiguration("t_order_item","ds$->{0..1}.t_order_item_$->{0..3}");
orderItemTableRuleConfiguration.setDatabaseShardingStrategy(new
StandardShardingStrategyConfiguration("order_id","db_mode_algorithm"));
orderItemTableRuleConfiguration.setTableShardingStrategy(new
StandardShardingStrategyConfiguration("order_id","tab_mode_algorithm"));
ruleConfiguration.getTables().add(orderItemTableRuleConfiguration);
ruleConfiguration.getTables().add(orderTableRuleConfiguration);
ruleConfiguration.getTables().add(tableRuleConfiguration);
Properties dbProps = new Properties();
dbProps.setProperty("sharding-count","2");
Properties tabProps = new Properties();
tabProps.setProperty("sharding-count","4");
ruleConfiguration.getShardingAlgorithms().put("db_mode_algorithm",
new ShardingSphereAlgorithmConfiguration("HASH_MOD",dbProps));
ruleConfiguration.getShardingAlgorithms().put("tab_mode_algorithm",new
ShardingSphereAlgorithmConfiguration("HASH_MOD",tabProps));
Properties keyGenerProps = new Properties();
keyGenerProps.setProperty("worker-id","123");
ruleConfiguration.getKeyGenerators().put("snowflake",new
ShardingSphereAlgorithmConfiguration("SNOWFLAKE",keyGenerProps));`
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