fix assertion in text index merge with projections

CurtizJ · CurtizJ · commit 657b8854fb7f · 2025-12-23T19:11:20.000+01:00
diff --git a/src/Storages/MergeTree/MergeTask.cpp b/src/Storages/MergeTree/MergeTask.cpp
@@ -1513,7 +1513,7 @@ bool MergeTask::MergeProjectionsStage::mergeMinMaxIndexAndPrepareProjections() c
             ReadableSize(global_ctx->merge_list_element_ptr->bytes_read_uncompressed / elapsed_seconds));
     }
 
-    if (global_ctx->merged_part_offsets && !global_ctx->projections_to_merge.empty())
+    if (global_ctx->merged_part_offsets && !global_ctx->merged_part_offsets->isFinalized())
         global_ctx->merged_part_offsets->flush();
 
     for (const auto & projection : global_ctx->projections_to_merge)
diff --git a/tests/queries/0_stateless/03774_text_index_projection_fuzzer.reference b/tests/queries/0_stateless/03774_text_index_projection_fuzzer.reference
diff --git a/tests/queries/0_stateless/03774_text_index_projection_fuzzer.sql b/tests/queries/0_stateless/03774_text_index_projection_fuzzer.sql
@@ -0,0 +1,17 @@
+SET enable_full_text_index = 1;
+DROP TABLE IF EXISTS t0;
+
+CREATE TABLE t0
+(
+    c0 Array(String),
+    INDEX i0 c0 TYPE text(tokenizer = sparseGrams),
+    PROJECTION p0 (SELECT c0 ORDER BY c0)
+)
+ENGINE = MergeTree() ORDER BY tuple();
+
+INSERT INTO TABLE t0 (c0) VALUES (['A']);
+INSERT INTO TABLE t0 (c0) VALUES (['B']);
+
+OPTIMIZE TABLE t0 FINAL;
+
+DROP TABLE t0;

Original file line number	Diff line number	Diff line change
`@@ -1513,7 +1513,7 @@ bool MergeTask::MergeProjectionsStage::mergeMinMaxIndexAndPrepareProjections() c`
`1513`	`1513`	`ReadableSize(global_ctx->merge_list_element_ptr->bytes_read_uncompressed / elapsed_seconds));`
`1514`	`1514`	`}`
`1515`	`1515`
`1516`		`- if (global_ctx->merged_part_offsets && !global_ctx->projections_to_merge.empty())`
	`1516`	`+ if (global_ctx->merged_part_offsets && !global_ctx->merged_part_offsets->isFinalized())`
`1517`	`1517`	`global_ctx->merged_part_offsets->flush();`
`1518`	`1518`
`1519`	`1519`	`for (const auto & projection : global_ctx->projections_to_merge)`