alamb commented on code in PR #16098: URL: https://github.com/apache/datafusion/pull/16098#discussion_r2095782759
########## datafusion/sqllogictest/test_files/parquet_statistics.slt: ########## @@ -0,0 +1,125 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at + +# http://www.apache.org/licenses/LICENSE-2.0 + +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. + +# Tests for statistics in parquet files. +# Writes data into two files: +# * test_table/0.parquet +# * test_table/1.parquet +# +# And verifies statistics are correctly calculated for the table +# +# NOTE that statistics are ONLY gathered when the table is first created +# so the table must be recreated to see the effects of the setting + +query I +COPY (values (1), (2), (3)) +TO 'test_files/scratch/parquet_statistics/test_table/0.parquet' +STORED AS PARQUET; +---- +3 + +query I +COPY (values (3), (4)) +TO 'test_files/scratch/parquet_statistics/test_table/1.parquet' +STORED AS PARQUET; +---- +2 + +statement ok +set datafusion.explain.physical_plan_only = true; + +statement ok +set datafusion.explain.show_statistics = true; + +###### +# By default, the statistics are not gathered +###### + +# Recreate the table to pick up the current setting +statement ok +CREATE EXTERNAL TABLE test_table +STORED AS PARQUET +LOCATION 'test_files/scratch/parquet_statistics/test_table'; + +query TT +EXPLAIN SELECT * FROM test_table WHERE column1 = 1; +---- +physical_plan +01)CoalesceBatchesExec: target_batch_size=8192, statistics=[Rows=Absent, Bytes=Absent, [(Col[0]:)]] +02)--FilterExec: column1@0 = 1, statistics=[Rows=Absent, Bytes=Absent, [(Col[0]: Min=Exact(Int64(1)) Max=Exact(Int64(1)))]] +03)----RepartitionExec: partitioning=RoundRobinBatch(4), input_partitions=2, statistics=[Rows=Absent, Bytes=Absent, [(Col[0]:)]] +04)------DataSourceExec: file_groups={2 groups: [[WORKSPACE_ROOT/datafusion/sqllogictest/test_files/scratch/parquet_statistics/test_table/0.parquet], [WORKSPACE_ROOT/datafusion/sqllogictest/test_files/scratch/parquet_statistics/test_table/1.parquet]]}, projection=[column1], file_type=parquet, predicate=column1@0 = 1, pruning_predicate=column1_null_count@2 != row_count@3 AND column1_min@0 <= 1 AND 1 <= column1_max@1, required_guarantees=[column1 in (1)] Review Comment: Update is I think it may be this issue reported by @davisp https://github.com/apache/datafusion/issues/15908 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For additional commands, e-mail: github-h...@datafusion.apache.org
