add a test

tests/queries/0_stateless/03261_test_merge_parquet_bloom_filter_minmax_stats.reference

@@ -0,0 +1,23 @@
+{
+	"meta":
+	[
+		{
+			"name": "int8",
+			"type": "Nullable(Int8)"
+		}
+	],
+
+	"data":
+	[
+
+	],
+
+	"rows": 0,
+
+	"statistics":
+	{
+		"elapsed": 0.05269874,
+		"rows_read": 0,
+		"bytes_read": 0
+	}
+}

tests/queries/0_stateless/03261_test_merge_parquet_bloom_filter_minmax_stats.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+# Tags: no-ubsan, no-fasttest
+
+CUR_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+# shellcheck source=../shell_config.sh
+. "$CUR_DIR"/../shell_config.sh
+
+
+USER_FILES_PATH=$($CLICKHOUSE_CLIENT_BINARY --query "select _path,_file from file('nonexist.txt', 'CSV', 'val1 char')" 2>&1 | grep Exception | awk '{gsub("/nonexist.txt","",$9); print $9}')
+
+WORKING_DIR="${USER_FILES_PATH}/${CLICKHOUSE_TEST_UNIQUE_NAME}"
+
+mkdir -p "${WORKING_DIR}"
+
+DATA_FILE="${CUR_DIR}/data_parquet/integers_1_5_no_3_bf_minmax.parquet"
+
+DATA_FILE_USER_PATH="${WORKING_DIR}/integers_1to5_no_3_bf_minmax.parquet"
+
+cp ${DATA_FILE} ${DATA_FILE_USER_PATH}
+
+# Prior to this PR, bloom filter and minmax were evaluated separately.
+# This was sub-optimal for conditions like `x = 3 or x > 5` where data is [1, 2, 4, 5].
+# Bloom filter is not able to handle greater than operations. Therefore, it can't evaluate x > 5. Even though it can tell
+# `3` is not in the set by evaluating `x = 3`, it can't discard the row group because of the `or` condition.
+# On the other hand, min max can handle both. It'll evaluate x = 3 to true (because it is within the range) and the latter to false
+# Therefore, bloom filter would determine `false or true` and minmax would determine `true or false`. Resulting in true.
+
+# Since both structures are now evaluated together, the row group should be skipped
+${CLICKHOUSE_CLIENT} --query="select * from file('${DATA_FILE_USER_PATH}', Parquet) WHERE int8 = 3 or int8 > 5 FORMAT Json SETTINGS input_format_parquet_filter_push_down=true, input_format_parquet_bloom_filter_push_down=true;"