add test

tests/queries/0_stateless/02521_avro_union_null_nested.reference

@@ -0,0 +1,15 @@
+manifest_path	String					
+manifest_length	Int64					
+partition_spec_id	Int32					
+added_snapshot_id	Nullable(Int64)					
+added_data_files_count	Nullable(Int32)					
+existing_data_files_count	Nullable(Int32)					
+deleted_data_files_count	Nullable(Int32)					
+partitions	Array(Tuple(contains_null Bool, contains_nan Nullable(Bool), lower_bound Nullable(String), upper_bound Nullable(String)))					
+added_rows_count	Nullable(Int64)					
+existing_rows_count	Nullable(Int64)					
+deleted_rows_count	Nullable(Int64)					
+file:/warehouse/nyc.db/taxis/metadata/f9e891e9-fbd3-4411-a5c6-0cc14a2f1392-m0.avro	6488	0	1793608066486471262	8	0	0	[(false,false,'
\0\0\0\0\0\0\0','\b\0\0\0\0\0\0\0')]	12	0	0
+file:/warehouse/nyc.db/taxis/metadata/a51dd31d-ea86-42dd-82d1-1981332a0f6d-m0.avro	6363	0	5735460159761889536	4	0	0	[(false,false,'\0\0\0\0\0\0\0','\b\0\0\0\0\0\0\0')]	4	0	0
+file:/warehouse/nyc.db/taxis/metadata/7ae325bd-fe20-4a55-917c-36cb8f6a488c-m0.avro	6370	0	7171740521400098346	4	0	0	[(false,false,'\0\0\0\0\0\0\0','\0\0\0\0\0\0\0')]	4	0	0
+file:/warehouse/nyc.db/taxis/metadata/5e3c62a9-1537-455f-98e5-0a067af5752a-m0.avro	6324	0	6850377589038341628	2	0	0	[(false,false,'
\0\0\0\0\0\0\0','\0\0\0\0\0\0\0')]	4	0	0

tests/queries/0_stateless/02521_avro_union_null_nested.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+# Tags: no-parallel, no-fasttest
+
+set -e
+
+CUR_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+# shellcheck source=../shell_config.sh
+. "$CUR_DIR"/../shell_config.sh
+
+DATA_DIR=$CUR_DIR/data_avro
+
+$CLICKHOUSE_LOCAL -q "desc file('$DATA_DIR/union_null_nested.avro')"
+$CLICKHOUSE_LOCAL -q "select * from file('$DATA_DIR/nullable_array.avro')"

tests/queries/0_stateless/02522_avro_complicate_schema.reference

@@ -0,0 +1,5 @@
+status	Int32					
+snapshot_id	Nullable(Int64)					
+data_file	Tuple(file_path String, file_format String, partition Tuple(vendor_id Nullable(Int64)), record_count Int64, file_size_in_bytes Int64, block_size_in_bytes Int64, column_sizes Array(Tuple(key Int32, value Int64)), value_counts Array(Tuple(key Int32, value Int64)), null_value_counts Array(Tuple(key Int32, value Int64)), nan_value_counts Array(Tuple(key Int32, value Int64)), lower_bounds Array(Tuple(key Int32, value String)), upper_bounds Array(Tuple(key Int32, value String)), key_metadata Nullable(String), split_offsets Array(Int64), sort_order_id Nullable(Int32))					
+1	6850377589038341628	('file:/warehouse/nyc.db/taxis/data/vendor_id=1/00000-0-c070e655-dc44-43d2-a01a-484f107210cb-00001.parquet','PARQUET',(1),2,1565,67108864,[(1,87),(2,51),(3,51),(4,57),(5,51)],[(1,2),(2,2),(3,2),(4,2),(5,2)],[(1,0),(2,0),(3,0),(4,0),(5,0)],[(3,0),(4,0)],[(1,'
\0\0\0\0\0\0\0'),(2,'³C\0\0\0\0\0'),(3,'ffæ?'),(4,'¤p=\n×£.@'),(5,'N')],[(1,'
\0\0\0\0\0\0\0'),(2,'¶C\0\0\0\0\0'),(3,'ffA'),(4,'q=\n×£E@'),(5,'Y')],NULL,[4],0)
+1	6850377589038341628	('file:/warehouse/nyc.db/taxis/data/vendor_id=2/00000-0-c070e655-dc44-43d2-a01a-484f107210cb-00002.parquet','PARQUET',(2),2,1620,67108864,[(1,87),(2,51),(3,51),(4,57),(5,89)],[(1,2),(2,2),(3,2),(4,2),(5,2)],[(1,0),(2,0),(3,0),(4,0),(5,0)],[(3,0),(4,0)],[(1,'\0\0\0\0\0\0\0'),(2,'´C\0\0\0\0\0'),(3,'fff?'),(4,'…ëQ¸"@'),(5,'N')],[(1,'\0\0\0\0\0\0\0'),(2,'µC\0\0\0\0\0'),(3,'\0\0 @'),(4,'fffff&6@'),(5,'N')],NULL,[4],0)

tests/queries/0_stateless/02522_avro_complicate_schema.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+# Tags: no-parallel, no-fasttest
+
+set -e
+
+CUR_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+# shellcheck source=../shell_config.sh
+. "$CUR_DIR"/../shell_config.sh
+
+DATA_DIR=$CUR_DIR/data_avro
+
+$CLICKHOUSE_LOCAL -q "desc file('$DATA_DIR/complicated_schema.avro')"
+$CLICKHOUSE_LOCAL -q "select * from file('$DATA_DIR/complicated_schema.avro')"