Merge pull request ClickHouse#80156 from Avogar/fix-arrow-lc-fixed-string

Fix logical error in Arrow format with LowCardinality(FixedString)

Author: Avogar

src/Processors/Formats/Impl/CHColumnToArrowColumn.cpp

@@ -52,7 +52,8 @@
         M(FLOAT, arrow::FloatType) \
         M(DOUBLE, arrow::DoubleType) \
         M(BINARY, arrow::BinaryType) \
-        M(STRING, arrow::StringType)
+        M(STRING, arrow::StringType) \
+        M(FIXED_SIZE_BINARY, arrow::FixedSizeBinaryType)
 
 namespace DB
 {
@@ -512,7 +513,7 @@ namespace DB
         FOR_ARROW_TYPES(DISPATCH)
 #undef DISPATCH
 
-        throw Exception(ErrorCodes::LOGICAL_ERROR, "Cannot fill arrow array with {} data.", column_type->getName());
+        throw Exception(ErrorCodes::LOGICAL_ERROR, "Cannot fill arrow array {} with {} data", value_type->name(), column_type->getName());
     }
 
     template <typename ColumnType, typename ArrowBuilder>

tests/queries/0_stateless/03460_arrow_lc_fixed_string.reference

@@ -0,0 +1,2 @@
+c1	LowCardinality(Nullable(FixedString(1)))					
+a

tests/queries/0_stateless/03460_arrow_lc_fixed_string.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+# Tags: no-fasttest
+
+CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+# shellcheck source=../shell_config.sh
+. "$CURDIR"/../shell_config.sh
+
+$CLICKHOUSE_LOCAL --output_format_arrow_low_cardinality_as_dictionary=1 "select 'a'::LowCardinality(FixedString(1)) as c1 format Arrow" | $CLICKHOUSE_LOCAL --input-format=Arrow --table=test -q "desc test; select * from test"
+