Fixing Not-ready set in constraint.

src/Processors/Transforms/CheckConstraintsTransform.cpp

@@ -10,6 +10,7 @@
 #include <Common/FieldVisitorToString.h>
 #include <Common/assert_cast.h>
 #include <Common/quoteString.h>
+#include <Storages/VirtualColumnUtils.h>
 
 
 namespace DB
@@ -31,6 +32,7 @@ CheckConstraintsTransform::CheckConstraintsTransform(
     , table_id(table_id_)
     , constraints_to_check(constraints_.filterConstraints(ConstraintsDescription::ConstraintType::CHECK))
     , expressions(constraints_.getExpressions(context_, header.getNamesAndTypesList()))
+    , context(std::move(context_))
 {
 }
 
@@ -39,6 +41,10 @@ void CheckConstraintsTransform::onConsume(Chunk chunk)
 {
     if (chunk.getNumRows() > 0)
     {
+        if (rows_written == 0)
+            for (const auto & expression : expressions)
+                VirtualColumnUtils::buildSetsForDAG(expression->getActionsDAG(), context);
+
         Block block_to_calculate = getInputPort().getHeader().cloneWithColumns(chunk.getColumns());
         for (size_t i = 0; i < expressions.size(); ++i)
         {

src/Processors/Transforms/CheckConstraintsTransform.h

@@ -35,6 +35,7 @@ private:
     StorageID table_id;
     const ASTs constraints_to_check;
     const ConstraintsExpressions expressions;
+    ContextPtr context;
     size_t rows_written = 0;
     Chunk cur_chunk;
 };

src/Storages/System/StorageSystemDetachedParts.cpp

@@ -328,7 +328,7 @@ void ReadFromSystemDetachedParts::applyFilters(ActionDAGNodes added_filter_nodes
 
         filter = VirtualColumnUtils::splitFilterDagForAllowedInputs(predicate, &block);
         if (filter)
-            VirtualColumnUtils::buildSetsForDAG(filter, context);
+            VirtualColumnUtils::buildSetsForDAG(*filter, context);
     }
 }
 

src/Storages/System/StorageSystemPartsBase.cpp

@@ -274,7 +274,7 @@ void ReadFromSystemPartsBase::applyFilters(ActionDAGNodes added_filter_nodes)
 
         filter_by_database = VirtualColumnUtils::splitFilterDagForAllowedInputs(predicate, &block);
         if (filter_by_database)
-            VirtualColumnUtils::buildSetsForDAG(filter_by_database, context);
+            VirtualColumnUtils::buildSetsForDAG(*filter_by_database, context);
 
         block.insert(ColumnWithTypeAndName({}, std::make_shared<DataTypeString>(), table_column_name));
         block.insert(ColumnWithTypeAndName({}, std::make_shared<DataTypeString>(), engine_column_name));
@@ -283,7 +283,7 @@ void ReadFromSystemPartsBase::applyFilters(ActionDAGNodes added_filter_nodes)
 
         filter_by_other_columns = VirtualColumnUtils::splitFilterDagForAllowedInputs(predicate, &block);
         if (filter_by_other_columns)
-            VirtualColumnUtils::buildSetsForDAG(filter_by_other_columns, context);
+            VirtualColumnUtils::buildSetsForDAG(*filter_by_other_columns, context);
     }
 }
 

src/Storages/VirtualColumnUtils.cpp

@@ -54,9 +54,9 @@ namespace DB
 namespace VirtualColumnUtils
 {
 
-void buildSetsForDAG(const ActionsDAGPtr & dag, const ContextPtr & context)
+void buildSetsForDAG(const ActionsDAG & dag, const ContextPtr & context)
 {
-    for (const auto & node : dag->getNodes())
+    for (const auto & node : dag.getNodes())
     {
         if (node.type == ActionsDAG::ActionType::COLUMN)
         {
@@ -79,7 +79,7 @@ void buildSetsForDAG(const ActionsDAGPtr & dag, const ContextPtr & context)
 
 void filterBlockWithDAG(ActionsDAGPtr dag, Block & block, ContextPtr context)
 {
-    buildSetsForDAG(dag, context);
+    buildSetsForDAG(*dag, context);
     auto actions = std::make_shared<ExpressionActions>(dag);
     Block block_with_filter = block;
     actions->execute(block_with_filter, /*dry_run=*/ false, /*allow_duplicates_in_input=*/ true);

src/Storages/VirtualColumnUtils.h

@@ -26,7 +26,7 @@ void filterBlockWithPredicate(const ActionsDAG::Node * predicate, Block & block,
 void filterBlockWithDAG(ActionsDAGPtr dag, Block & block, ContextPtr context);
 
 /// Builds sets used by ActionsDAG inplace.
-void buildSetsForDAG(const ActionsDAGPtr & dag, const ContextPtr & context);
+void buildSetsForDAG(const ActionsDAG & dag, const ContextPtr & context);
 
 /// Recursively checks if all functions used in DAG are deterministic in scope of query.
 bool isDeterministicInScopeOfQuery(const ActionsDAG::Node * node);

tests/queries/0_stateless/02841_not_ready_set_constraints.reference

@@ -0,0 +1 @@
+42

tests/queries/0_stateless/02841_not_ready_set_constraints.sql

@@ -0,0 +1,19 @@
+DROP TABLE IF EXISTS t1;
+DROP TABLE IF EXISTS t2;
+
+CREATE TABLE t1 (
+    `id` UInt64
+)
+ENGINE = MergeTree ORDER BY id;
+
+INSERT INTO t1(id) VALUES (42);
+
+CREATE TABLE t2 (
+    `conversation` UInt64,
+    CONSTRAINT constraint_conversation CHECK conversation IN (SELECT id FROM t1)
+)
+ENGINE = MergeTree ORDER BY conversation;
+
+INSERT INTO t2(conversation) VALUES (42);
+
+select * from t2;