fix prewhere population

zvonand · zvonand · commit d0e8ec2195ec · 2026-01-30T15:31:17.000+01:00
diff --git a/src/Storages/MergeTree/MergeTreeSelectProcessor.cpp b/src/Storages/MergeTree/MergeTreeSelectProcessor.cpp
@@ -155,8 +155,8 @@ PrewhereExprInfo MergeTreeSelectProcessor::getPrewhereActions(
         prewhere_actions.steps.emplace_back(std::make_shared<PrewhereExprStep>(std::move(row_level_filter_step)));
     }
 
-    if (!enable_multiple_prewhere_read_steps ||
-        !tryBuildPrewhereSteps(prewhere_info, actions_settings, prewhere_actions, force_short_circuit_execution))
+    if (prewhere_info &&
+        (!enable_multiple_prewhere_read_steps || !tryBuildPrewhereSteps(prewhere_info, actions_settings, prewhere_actions, force_short_circuit_execution)))
     {
         PrewhereExprStep prewhere_step
         {

Original file line number	Diff line number	Diff line change
`@@ -155,8 +155,8 @@ PrewhereExprInfo MergeTreeSelectProcessor::getPrewhereActions(`
`155`	`155`	`prewhere_actions.steps.emplace_back(std::make_shared<PrewhereExprStep>(std::move(row_level_filter_step)));`
`156`	`156`	`}`
`157`	`157`
`158`		`- if (!enable_multiple_prewhere_read_steps \|\|`
`159`		`- !tryBuildPrewhereSteps(prewhere_info, actions_settings, prewhere_actions, force_short_circuit_execution))`
	`158`	`+ if (prewhere_info &&`
	`159`	`+ (!enable_multiple_prewhere_read_steps \|\| !tryBuildPrewhereSteps(prewhere_info, actions_settings, prewhere_actions, force_short_circuit_execution)))`
`160`	`160`	`{`
`161`	`161`	`PrewhereExprStep prewhere_step`
`162`	`162`	`{`