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Posted to notifications@shardingsphere.apache.org by GitBox <gi...@apache.org> on 2022/05/27 08:43:56 UTC

[GitHub] [shardingsphere] tuichenchuxin opened a new pull request, #18006: add create view validator

tuichenchuxin opened a new pull request, #18006:
URL: https://github.com/apache/shardingsphere/pull/18006

   For #17915.
   
   Changes proposed in this pull request:
   - add create view sharding validator
   


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[GitHub] [shardingsphere] strongduanmu commented on a diff in pull request #18006: add create view validator

Posted by GitBox <gi...@apache.org>.
strongduanmu commented on code in PR #18006:
URL: https://github.com/apache/shardingsphere/pull/18006#discussion_r883479681


##########
shardingsphere-features/shardingsphere-sharding/shardingsphere-sharding-core/src/main/java/org/apache/shardingsphere/sharding/route/engine/validator/ddl/impl/ShardingCreateViewStatementValidator.java:
##########
@@ -35,11 +45,56 @@ public final class ShardingCreateViewStatementValidator extends ShardingDDLState
     @Override
     public void preValidate(final ShardingRule shardingRule, final SQLStatementContext<CreateViewStatement> sqlStatementContext,
                             final List<Object> parameters, final ShardingSphereDatabase database) {
-        // TODO prevent if has need merge select.
+        Optional<SelectStatement> selectStatement = sqlStatementContext.getSqlStatement().getSelect();
+        if (selectStatement.isPresent()) {

Review Comment:
   Do you think use the following logic is better?
   ```java
   if (!selectStatement.isPresent()) {
   return;
   }
   ```



##########
shardingsphere-features/shardingsphere-sharding/shardingsphere-sharding-core/src/main/java/org/apache/shardingsphere/sharding/route/engine/validator/ddl/impl/ShardingCreateViewStatementValidator.java:
##########
@@ -35,11 +45,56 @@ public final class ShardingCreateViewStatementValidator extends ShardingDDLState
     @Override
     public void preValidate(final ShardingRule shardingRule, final SQLStatementContext<CreateViewStatement> sqlStatementContext,
                             final List<Object> parameters, final ShardingSphereDatabase database) {
-        // TODO prevent if has need merge select.
+        Optional<SelectStatement> selectStatement = sqlStatementContext.getSqlStatement().getSelect();
+        if (selectStatement.isPresent()) {
+            TableExtractor extractor = new TableExtractor();
+            extractor.extractTablesFromSelect(selectStatement.get());
+            Collection<SimpleTableSegment> tableSegments = extractor.getRewriteTables();
+            for (SimpleTableSegment each : tableSegments) {
+                String logicTable = each.getTableName().getIdentifier().getValue();
+                if (shardingRule.isShardingTable(logicTable)) {
+                    validateShardingTableAndViewIsBind(shardingRule, sqlStatementContext.getSqlStatement().getView().getTableName().getIdentifier().getValue(), logicTable);

Review Comment:
   Can we rename this method to isBindingTables()? And return boolean type.



##########
shardingsphere-features/shardingsphere-sharding/shardingsphere-sharding-core/src/main/java/org/apache/shardingsphere/sharding/route/engine/validator/ddl/impl/ShardingCreateViewStatementValidator.java:
##########
@@ -35,11 +45,56 @@ public final class ShardingCreateViewStatementValidator extends ShardingDDLState
     @Override
     public void preValidate(final ShardingRule shardingRule, final SQLStatementContext<CreateViewStatement> sqlStatementContext,
                             final List<Object> parameters, final ShardingSphereDatabase database) {
-        // TODO prevent if has need merge select.
+        Optional<SelectStatement> selectStatement = sqlStatementContext.getSqlStatement().getSelect();
+        if (selectStatement.isPresent()) {
+            TableExtractor extractor = new TableExtractor();
+            extractor.extractTablesFromSelect(selectStatement.get());
+            Collection<SimpleTableSegment> tableSegments = extractor.getRewriteTables();
+            for (SimpleTableSegment each : tableSegments) {
+                String logicTable = each.getTableName().getIdentifier().getValue();
+                if (shardingRule.isShardingTable(logicTable)) {
+                    validateShardingTableAndViewIsBind(shardingRule, sqlStatementContext.getSqlStatement().getView().getTableName().getIdentifier().getValue(), logicTable);
+                }
+            }
+        }
     }
     
     @Override
     public void postValidate(final ShardingRule shardingRule, final SQLStatementContext<CreateViewStatement> sqlStatementContext, final List<Object> parameters,
                              final ShardingSphereDatabase database, final ConfigurationProperties props, final RouteContext routeContext) {
+        Optional<SelectStatement> selectStatement = sqlStatementContext.getSqlStatement().getSelect();
+        selectStatement.ifPresent(statement -> validateNeedsMerge(statement, routeContext));
+    }
+    
+    private void validateShardingTableAndViewIsBind(final ShardingRule shardingRule, final String logicViewName, final String logicTable) {
+        Collection<String> bindTables = Arrays.asList(logicTable, logicViewName);
+        if (shardingRule.isShardingTable(logicTable) && !shardingRule.isAllBindingTables(bindTables)) {
+            throw new ShardingSphereException("View name has to bind to sharding tables!");
+        }
+    }
+    
+    private void validateNeedsMerge(final SelectStatement selectStatement, final RouteContext routeContext) {
+        if (routeContext.getRouteUnits().size() <= 1) {
+            return;
+        }
+        if (hasGroupBy(selectStatement) || hasAggregation(selectStatement) || hasDistinct(selectStatement) || hasLimit(selectStatement)) {
+            throw new ShardingSphereException("Can not support creating view which has query that needs to be merged!");
+        }
+    }
+    
+    private boolean hasGroupBy(final SelectStatement selectStatement) {
+        return selectStatement.getGroupBy().map(GroupBySegment::getGroupByItems).filter(each -> !each.isEmpty()).isPresent();
+    }
+    
+    private boolean hasAggregation(final SelectStatement selectStatement) {
+        return selectStatement.getProjections().getProjections().stream().anyMatch(each -> each instanceof AggregationProjectionSegment);

Review Comment:
   Please do not use stream api.



##########
shardingsphere-features/shardingsphere-sharding/shardingsphere-sharding-core/src/main/java/org/apache/shardingsphere/sharding/route/engine/validator/ddl/impl/ShardingCreateViewStatementValidator.java:
##########
@@ -35,11 +45,56 @@ public final class ShardingCreateViewStatementValidator extends ShardingDDLState
     @Override
     public void preValidate(final ShardingRule shardingRule, final SQLStatementContext<CreateViewStatement> sqlStatementContext,
                             final List<Object> parameters, final ShardingSphereDatabase database) {
-        // TODO prevent if has need merge select.
+        Optional<SelectStatement> selectStatement = sqlStatementContext.getSqlStatement().getSelect();
+        if (selectStatement.isPresent()) {
+            TableExtractor extractor = new TableExtractor();
+            extractor.extractTablesFromSelect(selectStatement.get());
+            Collection<SimpleTableSegment> tableSegments = extractor.getRewriteTables();
+            for (SimpleTableSegment each : tableSegments) {
+                String logicTable = each.getTableName().getIdentifier().getValue();
+                if (shardingRule.isShardingTable(logicTable)) {
+                    validateShardingTableAndViewIsBind(shardingRule, sqlStatementContext.getSqlStatement().getView().getTableName().getIdentifier().getValue(), logicTable);
+                }
+            }
+        }
     }
     
     @Override
     public void postValidate(final ShardingRule shardingRule, final SQLStatementContext<CreateViewStatement> sqlStatementContext, final List<Object> parameters,
                              final ShardingSphereDatabase database, final ConfigurationProperties props, final RouteContext routeContext) {
+        Optional<SelectStatement> selectStatement = sqlStatementContext.getSqlStatement().getSelect();
+        selectStatement.ifPresent(statement -> validateNeedsMerge(statement, routeContext));

Review Comment:
   Can we rename this method to isContainsNotSupportedViewStatement()? And return boolean type.



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[GitHub] [shardingsphere] tuichenchuxin commented on a diff in pull request #18006: add create view validator

Posted by GitBox <gi...@apache.org>.
tuichenchuxin commented on code in PR #18006:
URL: https://github.com/apache/shardingsphere/pull/18006#discussion_r884369944


##########
shardingsphere-features/shardingsphere-sharding/shardingsphere-sharding-core/src/main/java/org/apache/shardingsphere/sharding/route/engine/validator/ddl/impl/ShardingCreateViewStatementValidator.java:
##########
@@ -35,11 +45,56 @@ public final class ShardingCreateViewStatementValidator extends ShardingDDLState
     @Override
     public void preValidate(final ShardingRule shardingRule, final SQLStatementContext<CreateViewStatement> sqlStatementContext,
                             final List<Object> parameters, final ShardingSphereDatabase database) {
-        // TODO prevent if has need merge select.
+        Optional<SelectStatement> selectStatement = sqlStatementContext.getSqlStatement().getSelect();
+        if (selectStatement.isPresent()) {

Review Comment:
   Thank you. Done.



##########
shardingsphere-features/shardingsphere-sharding/shardingsphere-sharding-core/src/main/java/org/apache/shardingsphere/sharding/route/engine/validator/ddl/impl/ShardingCreateViewStatementValidator.java:
##########
@@ -35,11 +45,56 @@ public final class ShardingCreateViewStatementValidator extends ShardingDDLState
     @Override
     public void preValidate(final ShardingRule shardingRule, final SQLStatementContext<CreateViewStatement> sqlStatementContext,
                             final List<Object> parameters, final ShardingSphereDatabase database) {
-        // TODO prevent if has need merge select.
+        Optional<SelectStatement> selectStatement = sqlStatementContext.getSqlStatement().getSelect();
+        if (selectStatement.isPresent()) {
+            TableExtractor extractor = new TableExtractor();
+            extractor.extractTablesFromSelect(selectStatement.get());
+            Collection<SimpleTableSegment> tableSegments = extractor.getRewriteTables();
+            for (SimpleTableSegment each : tableSegments) {
+                String logicTable = each.getTableName().getIdentifier().getValue();
+                if (shardingRule.isShardingTable(logicTable)) {
+                    validateShardingTableAndViewIsBind(shardingRule, sqlStatementContext.getSqlStatement().getView().getTableName().getIdentifier().getValue(), logicTable);

Review Comment:
   Thank you. Done.



##########
shardingsphere-features/shardingsphere-sharding/shardingsphere-sharding-core/src/main/java/org/apache/shardingsphere/sharding/route/engine/validator/ddl/impl/ShardingCreateViewStatementValidator.java:
##########
@@ -35,11 +45,56 @@ public final class ShardingCreateViewStatementValidator extends ShardingDDLState
     @Override
     public void preValidate(final ShardingRule shardingRule, final SQLStatementContext<CreateViewStatement> sqlStatementContext,
                             final List<Object> parameters, final ShardingSphereDatabase database) {
-        // TODO prevent if has need merge select.
+        Optional<SelectStatement> selectStatement = sqlStatementContext.getSqlStatement().getSelect();
+        if (selectStatement.isPresent()) {
+            TableExtractor extractor = new TableExtractor();
+            extractor.extractTablesFromSelect(selectStatement.get());
+            Collection<SimpleTableSegment> tableSegments = extractor.getRewriteTables();
+            for (SimpleTableSegment each : tableSegments) {
+                String logicTable = each.getTableName().getIdentifier().getValue();
+                if (shardingRule.isShardingTable(logicTable)) {
+                    validateShardingTableAndViewIsBind(shardingRule, sqlStatementContext.getSqlStatement().getView().getTableName().getIdentifier().getValue(), logicTable);
+                }
+            }
+        }
     }
     
     @Override
     public void postValidate(final ShardingRule shardingRule, final SQLStatementContext<CreateViewStatement> sqlStatementContext, final List<Object> parameters,
                              final ShardingSphereDatabase database, final ConfigurationProperties props, final RouteContext routeContext) {
+        Optional<SelectStatement> selectStatement = sqlStatementContext.getSqlStatement().getSelect();
+        selectStatement.ifPresent(statement -> validateNeedsMerge(statement, routeContext));

Review Comment:
   Thank you. Done.



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[GitHub] [shardingsphere] tuichenchuxin commented on a diff in pull request #18006: add create view validator

Posted by GitBox <gi...@apache.org>.
tuichenchuxin commented on code in PR #18006:
URL: https://github.com/apache/shardingsphere/pull/18006#discussion_r884370002


##########
shardingsphere-features/shardingsphere-sharding/shardingsphere-sharding-core/src/main/java/org/apache/shardingsphere/sharding/route/engine/validator/ddl/impl/ShardingCreateViewStatementValidator.java:
##########
@@ -35,11 +45,56 @@ public final class ShardingCreateViewStatementValidator extends ShardingDDLState
     @Override
     public void preValidate(final ShardingRule shardingRule, final SQLStatementContext<CreateViewStatement> sqlStatementContext,
                             final List<Object> parameters, final ShardingSphereDatabase database) {
-        // TODO prevent if has need merge select.
+        Optional<SelectStatement> selectStatement = sqlStatementContext.getSqlStatement().getSelect();
+        if (selectStatement.isPresent()) {
+            TableExtractor extractor = new TableExtractor();
+            extractor.extractTablesFromSelect(selectStatement.get());
+            Collection<SimpleTableSegment> tableSegments = extractor.getRewriteTables();
+            for (SimpleTableSegment each : tableSegments) {
+                String logicTable = each.getTableName().getIdentifier().getValue();
+                if (shardingRule.isShardingTable(logicTable)) {
+                    validateShardingTableAndViewIsBind(shardingRule, sqlStatementContext.getSqlStatement().getView().getTableName().getIdentifier().getValue(), logicTable);
+                }
+            }
+        }
     }
     
     @Override
     public void postValidate(final ShardingRule shardingRule, final SQLStatementContext<CreateViewStatement> sqlStatementContext, final List<Object> parameters,
                              final ShardingSphereDatabase database, final ConfigurationProperties props, final RouteContext routeContext) {
+        Optional<SelectStatement> selectStatement = sqlStatementContext.getSqlStatement().getSelect();
+        selectStatement.ifPresent(statement -> validateNeedsMerge(statement, routeContext));
+    }
+    
+    private void validateShardingTableAndViewIsBind(final ShardingRule shardingRule, final String logicViewName, final String logicTable) {
+        Collection<String> bindTables = Arrays.asList(logicTable, logicViewName);
+        if (shardingRule.isShardingTable(logicTable) && !shardingRule.isAllBindingTables(bindTables)) {
+            throw new ShardingSphereException("View name has to bind to sharding tables!");
+        }
+    }
+    
+    private void validateNeedsMerge(final SelectStatement selectStatement, final RouteContext routeContext) {
+        if (routeContext.getRouteUnits().size() <= 1) {
+            return;
+        }
+        if (hasGroupBy(selectStatement) || hasAggregation(selectStatement) || hasDistinct(selectStatement) || hasLimit(selectStatement)) {
+            throw new ShardingSphereException("Can not support creating view which has query that needs to be merged!");
+        }
+    }
+    
+    private boolean hasGroupBy(final SelectStatement selectStatement) {
+        return selectStatement.getGroupBy().map(GroupBySegment::getGroupByItems).filter(each -> !each.isEmpty()).isPresent();
+    }
+    
+    private boolean hasAggregation(final SelectStatement selectStatement) {
+        return selectStatement.getProjections().getProjections().stream().anyMatch(each -> each instanceof AggregationProjectionSegment);

Review Comment:
   Thank you. Done.



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[GitHub] [shardingsphere] strongduanmu merged pull request #18006: add create view validator

Posted by GitBox <gi...@apache.org>.
strongduanmu merged PR #18006:
URL: https://github.com/apache/shardingsphere/pull/18006


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[GitHub] [shardingsphere] codecov-commenter commented on pull request #18006: add create view validator

Posted by GitBox <gi...@apache.org>.
codecov-commenter commented on PR #18006:
URL: https://github.com/apache/shardingsphere/pull/18006#issuecomment-1139442582

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   > Merging [#18006](https://codecov.io/gh/apache/shardingsphere/pull/18006?src=pr&el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation) (7d3ae7a) into [master](https://codecov.io/gh/apache/shardingsphere/commit/8442124985cab30ef10bcbfa6229fe984d06df4a?el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation) (8442124) will **decrease** coverage by `0.06%`.
   > The diff coverage is `47.58%`.
   
   > :exclamation: Current head 7d3ae7a differs from pull request most recent head 1e3f5cc. Consider uploading reports for the commit 1e3f5cc to get more accurate results
   
   ```diff
   @@             Coverage Diff              @@
   ##             master   #18006      +/-   ##
   ============================================
   - Coverage     58.99%   58.93%   -0.07%     
   - Complexity     2141     2146       +5     
   ============================================
     Files          3642     3651       +9     
     Lines         54018    54127     +109     
     Branches       9186     9197      +11     
   ============================================
   + Hits          31868    31899      +31     
   - Misses        19437    19518      +81     
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   ```
   
   
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