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## What changes were proposed in this pull request?
This PR aims to fix all Scala-Style multiline comments into Java-Style multiline comments in Scala codes.
(All comment-only changes over 77 files: +786 lines, −747 lines)
## How was this patch tested?
Manual.
Author: Dongjoon Hyun <dongjoon@apache.org>
Closes #12130 from dongjoon-hyun/use_multiine_javadoc_comments.
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## What changes were proposed in this pull request?
Typo fixes. No functional changes.
## How was this patch tested?
Built the sources and ran with samples.
Author: Jacek Laskowski <jacek@japila.pl>
Closes #11802 from jaceklaskowski/typo-fixes.
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data source
## What changes were proposed in this pull request?
While trying to create a PR (which was not an issue at the end), I just corrected some style nits.
So, I removed the changes except for some coding style corrections.
- According to the [scala-style-guide#documentation-style](https://github.com/databricks/scala-style-guide#documentation-style), Scala style comments are discouraged.
>```scala
>/** This is a correct one-liner, short description. */
>
>/**
> * This is correct multi-line JavaDoc comment. And
> * this is my second line, and if I keep typing, this would be
> * my third line.
> */
>
>/** In Spark, we don't use the ScalaDoc style so this
> * is not correct.
> */
>```
- Double newlines between consecutive methods was removed. According to [scala-style-guide#blank-lines-vertical-whitespace](https://github.com/databricks/scala-style-guide#blank-lines-vertical-whitespace), single newline appears when
>Between consecutive members (or initializers) of a class: fields, constructors, methods, nested classes, static initializers, instance initializers.
- Remove uesless parentheses in tests
- Use `mapPartitions` instead of `mapPartitionsWithIndex()`.
## How was this patch tested?
Unit tests were used and `dev/run_tests` for style tests.
Author: hyukjinkwon <gurwls223@gmail.com>
Closes #12109 from HyukjinKwon/SPARK-14271.
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## What changes were proposed in this pull request?
In the Dataset API, it is fairly difficult for users to perform simple aggregations in a type-safe way at the moment because there are no aggregators that have been implemented. This pull request adds a few common aggregate functions in expressions.scala.typed package, and also creates the expressions.java.typed package without implementation. The java implementation should probably come as a separate pull request. One challenge there is to resolve the type difference between Scala primitive types and Java boxed types.
## How was this patch tested?
Added unit tests for them.
Author: Reynold Xin <rxin@databricks.com>
Closes #12077 from rxin/SPARK-14285.
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## What changes were proposed in this pull request?
This PR implements `EXPLAIN CODEGEN` SQL command which returns generated codes like `debugCodegen`. In `spark-shell`, we don't need to `import debug` module. In `spark-sql`, we can use this SQL command now.
**Before**
```
scala> import org.apache.spark.sql.execution.debug._
scala> sql("select 'a' as a group by 1").debugCodegen()
Found 2 WholeStageCodegen subtrees.
== Subtree 1 / 2 ==
...
Generated code:
...
== Subtree 2 / 2 ==
...
Generated code:
...
```
**After**
```
scala> sql("explain extended codegen select 'a' as a group by 1").collect().foreach(println)
[Found 2 WholeStageCodegen subtrees.]
[== Subtree 1 / 2 ==]
...
[]
[Generated code:]
...
[]
[== Subtree 2 / 2 ==]
...
[]
[Generated code:]
...
```
## How was this patch tested?
Pass the Jenkins tests (including new testcases)
Author: Dongjoon Hyun <dongjoon@apache.org>
Closes #12099 from dongjoon-hyun/SPARK-14251.
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exceed JVM size limit for cached DataFrames
## What changes were proposed in this pull request?
This PR reduces Java byte code size of method in ```SpecificColumnarIterator``` by using a approach to make a group for lot of ```ColumnAccessor``` instantiations or method calls (more than 200) into a method
## How was this patch tested?
Added a new unit test, which includes large instantiations and method calls, to ```InMemoryColumnarQuerySuite```
Author: Kazuaki Ishizaki <ishizaki@jp.ibm.com>
Closes #12108 from kiszk/SPARK-14138-master.
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side when evaluating window functions
## What changes were proposed in this pull request?
`SizeBasedWindowFunction.n` is a global singleton attribute created for evaluating size based aggregate window functions like `CUME_DIST`. However, this attribute gets different expression IDs when created on both driver side and executor side. This PR adds `withPartitionSize` method to `SizeBasedWindowFunction` so that we can easily rewrite `SizeBasedWindowFunction.n` on executor side.
## How was this patch tested?
A test case is added in `HiveSparkSubmitSuite`, which supports launching multi-process clusters.
Author: Cheng Lian <lian@databricks.com>
Closes #12040 from liancheng/spark-14244-fix-sized-window-function.
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This PR adds the ability to perform aggregations inside of a `ContinuousQuery`. In order to implement this feature, the planning of aggregation has augmented with a new `StatefulAggregationStrategy`. Unlike batch aggregation, stateful-aggregation uses the `StateStore` (introduced in #11645) to persist the results of partial aggregation across different invocations. The resulting physical plan performs the aggregation using the following progression:
- Partial Aggregation
- Shuffle
- Partial Merge (now there is at most 1 tuple per group)
- StateStoreRestore (now there is 1 tuple from this batch + optionally one from the previous)
- Partial Merge (now there is at most 1 tuple per group)
- StateStoreSave (saves the tuple for the next batch)
- Complete (output the current result of the aggregation)
The following refactoring was also performed to allow us to plug into existing code:
- The get/put implementation is taken from #12013
- The logic for breaking down and de-duping the physical execution of aggregation has been move into a new pattern `PhysicalAggregation`
- The `AttributeReference` used to identify the result of an `AggregateFunction` as been moved into the `AggregateExpression` container. This change moves the reference into the same object as the other intermediate references used in aggregation and eliminates the need to pass around a `Map[(AggregateFunction, Boolean), Attribute]`. Further clean up (using a different aggregation container for logical/physical plans) is deferred to a followup.
- Some planning logic is moved from the `SessionState` into the `QueryExecution` to make it easier to override in the streaming case.
- The ability to write a `StreamTest` that checks only the output of the last batch has been added to simulate the future addition of output modes.
Author: Michael Armbrust <michael@databricks.com>
Closes #12048 from marmbrus/statefulAgg.
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## What changes were proposed in this pull request?
RpcEndpoint is not thread safe and allows multiple messages to be processed at the same time. StateStoreCoordinator should use ThreadSafeRpcEndpoint.
## How was this patch tested?
Existing unit tests.
Author: Shixiong Zhu <shixiong@databricks.com>
Closes #12100 from zsxwing/fix-StateStoreCoordinator.
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JIRA: https://issues.apache.org/jira/browse/SPARK-13674
## What changes were proposed in this pull request?
Sample operator doesn't support wholestage codegen now. This pr is to add support to it.
## How was this patch tested?
A test is added into `BenchmarkWholeStageCodegen`. Besides, all tests should be passed.
Author: Liang-Chi Hsieh <simonh@tw.ibm.com>
Author: Liang-Chi Hsieh <viirya@gmail.com>
Closes #11517 from viirya/add-wholestage-sample.
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## What changes were proposed in this pull request?
This PR adds the function `window` as a column expression.
`window` can be used to bucket rows into time windows given a time column. With this expression, performing time series analysis on batch data, as well as streaming data should become much more simpler.
### Usage
Assume the following schema:
`sensor_id, measurement, timestamp`
To average 5 minute data every 1 minute (window length of 5 minutes, slide duration of 1 minute), we will use:
```scala
df.groupBy(window("timestamp", “5 minutes”, “1 minute”), "sensor_id")
.agg(mean("measurement").as("avg_meas"))
```
This will generate windows such as:
```
09:00:00-09:05:00
09:01:00-09:06:00
09:02:00-09:07:00 ...
```
Intervals will start at every `slideDuration` starting at the unix epoch (1970-01-01 00:00:00 UTC).
To start intervals at a different point of time, e.g. 30 seconds after a minute, the `startTime` parameter can be used.
```scala
df.groupBy(window("timestamp", “5 minutes”, “1 minute”, "30 second"), "sensor_id")
.agg(mean("measurement").as("avg_meas"))
```
This will generate windows such as:
```
09:00:30-09:05:30
09:01:30-09:06:30
09:02:30-09:07:30 ...
```
Support for Python will be made in a follow up PR after this.
## How was this patch tested?
This patch has some basic unit tests for the `TimeWindow` expression testing that the parameters pass validation, and it also has some unit/integration tests testing the correctness of the windowing and usability in complex operations (multi-column grouping, multi-column projections, joins).
Author: Burak Yavuz <brkyvz@gmail.com>
Author: Michael Armbrust <michael@databricks.com>
Closes #12008 from brkyvz/df-time-window.
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`debugCodegen`
## What changes were proposed in this pull request?
This PR updates the usage comments of `debug` according to the following commits.
- [SPARK-9754](https://issues.apache.org/jira/browse/SPARK-9754) removed `typeCheck`.
- [SPARK-14227](https://issues.apache.org/jira/browse/SPARK-14227) added `debugCodegen`.
## How was this patch tested?
Manual.
Author: Dongjoon Hyun <dongjoon@apache.org>
Closes #12094 from dongjoon-hyun/minor_fix_debug_usage.
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SHOW TABLE to use table identifier pattern
## What changes were proposed in this pull request?
This PR addresses the following
1. Supports native execution of SHOW DATABASES command
2. Fixes SHOW TABLES to apply the identifier_with_wildcards pattern if supplied.
SHOW TABLE syntax
```
SHOW TABLES [IN database_name] ['identifier_with_wildcards'];
```
SHOW DATABASES syntax
```
SHOW (DATABASES|SCHEMAS) [LIKE 'identifier_with_wildcards'];
```
## How was this patch tested?
Tests added in SQLQuerySuite (both hive and sql contexts) and DDLCommandSuite
Note: Since the table name pattern was not working , tests are added in both SQLQuerySuite to
verify the application of the table pattern.
Author: Dilip Biswal <dbiswal@us.ibm.com>
Closes #11991 from dilipbiswal/dkb_show_database.
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## What changes were proposed in this pull request?
This PR implements `FileFormat.buildReader()` for the LibSVM data source. Besides that, a new interface method `prepareRead()` is added to `FileFormat`:
```scala
def prepareRead(
sqlContext: SQLContext,
options: Map[String, String],
files: Seq[FileStatus]): Map[String, String] = options
```
After migrating from `buildInternalScan()` to `buildReader()`, we lost the opportunity to collect necessary global information, since `buildReader()` works in a per-partition manner. For example, LibSVM needs to infer the total number of features if the `numFeatures` data source option is not set. Any necessary collected global information should be returned using the data source options map. By default, this method just returns the original options untouched.
An alternative approach is to absorb `inferSchema()` into `prepareRead()`, since schema inference is also some kind of global information gathering. However, this approach wasn't chosen because schema inference is optional, while `prepareRead()` must be called whenever a `HadoopFsRelation` based data source relation is instantiated.
One unaddressed problem is that, when `numFeatures` is absent, now the input data will be scanned twice. The `buildInternalScan()` code path doesn't need to do this because it caches the raw parsed RDD in memory before computing the total number of features. However, with `FileScanRDD`, the raw parsed RDD is created in a different way (e.g. partitioning) from the final RDD.
## How was this patch tested?
Tested using existing test suites.
Author: Cheng Lian <lian@databricks.com>
Closes #12088 from liancheng/spark-14295-libsvm-build-reader.
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## What changes were proposed in this pull request?
This PR support multiple Python UDFs within single batch, also improve the performance.
```python
>>> from pyspark.sql.types import IntegerType
>>> sqlContext.registerFunction("double", lambda x: x * 2, IntegerType())
>>> sqlContext.registerFunction("add", lambda x, y: x + y, IntegerType())
>>> sqlContext.sql("SELECT double(add(1, 2)), add(double(2), 1)").explain(True)
== Parsed Logical Plan ==
'Project [unresolvedalias('double('add(1, 2)), None),unresolvedalias('add('double(2), 1), None)]
+- OneRowRelation$
== Analyzed Logical Plan ==
double(add(1, 2)): int, add(double(2), 1): int
Project [double(add(1, 2))#14,add(double(2), 1)#15]
+- Project [double(add(1, 2))#14,add(double(2), 1)#15]
+- Project [pythonUDF0#16 AS double(add(1, 2))#14,pythonUDF0#18 AS add(double(2), 1)#15]
+- EvaluatePython [add(pythonUDF1#17, 1)], [pythonUDF0#18]
+- EvaluatePython [double(add(1, 2)),double(2)], [pythonUDF0#16,pythonUDF1#17]
+- OneRowRelation$
== Optimized Logical Plan ==
Project [pythonUDF0#16 AS double(add(1, 2))#14,pythonUDF0#18 AS add(double(2), 1)#15]
+- EvaluatePython [add(pythonUDF1#17, 1)], [pythonUDF0#18]
+- EvaluatePython [double(add(1, 2)),double(2)], [pythonUDF0#16,pythonUDF1#17]
+- OneRowRelation$
== Physical Plan ==
WholeStageCodegen
: +- Project [pythonUDF0#16 AS double(add(1, 2))#14,pythonUDF0#18 AS add(double(2), 1)#15]
: +- INPUT
+- !BatchPythonEvaluation [add(pythonUDF1#17, 1)], [pythonUDF0#16,pythonUDF1#17,pythonUDF0#18]
+- !BatchPythonEvaluation [double(add(1, 2)),double(2)], [pythonUDF0#16,pythonUDF1#17]
+- Scan OneRowRelation[]
```
## How was this patch tested?
Added new tests.
Using the following script to benchmark 1, 2 and 3 udfs,
```
df = sqlContext.range(1, 1 << 23, 1, 4)
double = F.udf(lambda x: x * 2, LongType())
print df.select(double(df.id)).count()
print df.select(double(df.id), double(df.id + 1)).count()
print df.select(double(df.id), double(df.id + 1), double(df.id + 2)).count()
```
Here is the results:
N | Before | After | speed up
---- |------------ | -------------|------
1 | 22 s | 7 s | 3.1X
2 | 38 s | 13 s | 2.9X
3 | 58 s | 16 s | 3.6X
This benchmark ran locally with 4 CPUs. For 3 UDFs, it launched 12 Python before before this patch, 4 process after this patch. After this patch, it will use less memory for multiple UDFs than before (less buffering).
Author: Davies Liu <davies@databricks.com>
Closes #12057 from davies/multi_udfs.
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This PR is to provide native parsing support for DDL commands: `Alter View`. Since its AST trees are highly similar to `Alter Table`. Thus, both implementation are integrated into the same one.
Based on the Hive DDL document:
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL and https://cwiki.apache.org/confluence/display/Hive/PartitionedViews
**Syntax:**
```SQL
ALTER VIEW view_name RENAME TO new_view_name
```
- to change the name of a view to a different name
**Syntax:**
```SQL
ALTER VIEW view_name SET TBLPROPERTIES ('comment' = new_comment);
```
- to add metadata to a view
**Syntax:**
```SQL
ALTER VIEW view_name UNSET TBLPROPERTIES [IF EXISTS] ('comment', 'key')
```
- to remove metadata from a view
**Syntax:**
```SQL
ALTER VIEW view_name ADD [IF NOT EXISTS] PARTITION spec1[, PARTITION spec2, ...]
```
- to add the partitioning metadata for a view.
- the syntax of partition spec in `ALTER VIEW` is identical to `ALTER TABLE`, **EXCEPT** that it is **ILLEGAL** to specify a `LOCATION` clause.
**Syntax:**
```SQL
ALTER VIEW view_name DROP [IF EXISTS] PARTITION spec1[, PARTITION spec2, ...]
```
- to drop the related partition metadata for a view.
Added the related test cases to `DDLCommandSuite`
Author: gatorsmile <gatorsmile@gmail.com>
Author: xiaoli <lixiao1983@gmail.com>
Author: Xiao Li <xiaoli@Xiaos-MacBook-Pro.local>
Closes #11987 from gatorsmile/parseAlterView.
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## What changes were proposed in this pull request?
Fixes a minor bug in the record reader constructor that was possibly introduced during refactoring.
## How was this patch tested?
N/A
Author: Sameer Agarwal <sameer@databricks.com>
Closes #12070 from sameeragarwal/vectorized-rr.
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## What changes were proposed in this pull request?
This PR proposes a new data-structure based on a vectorized hashmap that can be potentially _codegened_ in `TungstenAggregate` to speed up aggregates with group by. Micro-benchmarks show a 10x improvement over the current `BytesToBytes` aggregation map.
## How was this patch tested?
Intel(R) Core(TM) i7-4960HQ CPU 2.60GHz
BytesToBytesMap: Best/Avg Time(ms) Rate(M/s) Per Row(ns) Relative
-------------------------------------------------------------------------------------------
hash 108 / 119 96.9 10.3 1.0X
fast hash 63 / 70 166.2 6.0 1.7X
arrayEqual 70 / 73 150.8 6.6 1.6X
Java HashMap (Long) 141 / 200 74.3 13.5 0.8X
Java HashMap (two ints) 145 / 185 72.3 13.8 0.7X
Java HashMap (UnsafeRow) 499 / 524 21.0 47.6 0.2X
BytesToBytesMap (off Heap) 483 / 548 21.7 46.0 0.2X
BytesToBytesMap (on Heap) 485 / 562 21.6 46.2 0.2X
Vectorized Hashmap 54 / 60 193.7 5.2 2.0X
Author: Sameer Agarwal <sameer@databricks.com>
Closes #12055 from sameeragarwal/vectorized-hashmap.
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### What changes were proposed in this pull request?
This PR removes the ANTLR3 based parser, and moves the new ANTLR4 based parser into the `org.apache.spark.sql.catalyst.parser package`.
### How was this patch tested?
Existing unit tests.
cc rxin andrewor14 yhuai
Author: Herman van Hovell <hvanhovell@questtec.nl>
Closes #12071 from hvanhovell/SPARK-14211.
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## What changes were proposed in this pull request?
Major changes:
1. Implement `FileFormat.buildReader()` for the CSV data source.
1. Add an extra argument to `FileFormat.buildReader()`, `physicalSchema`, which is basically the result of `FileFormat.inferSchema` or user specified schema.
This argument is necessary because the CSV data source needs to know all the columns of the underlying files to read the file.
## How was this patch tested?
Existing tests should do the work.
Author: Cheng Lian <lian@databricks.com>
Closes #12002 from liancheng/spark-14206-csv-build-reader.
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## What changes were proposed in this pull request?
This change resolves an issue where `DataFrameNaFunctions.fill` changes a `FloatType` column to a `DoubleType`. We also clarify the contract that replacement values will be cast to the column data type, which may change the replacement value when casting to a lower precision type.
## How was this patch tested?
This patch has associated unit tests.
Author: Travis Crawford <travis@medium.com>
Closes #11967 from traviscrawford/SPARK-14081-dataframena.
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properly
## What changes were proposed in this pull request?
This PR improves `CodeFormatter` to fix the following malformed indentations.
```java
/* 019 */ public java.lang.Object apply(java.lang.Object _i) {
/* 020 */ InternalRow i = (InternalRow) _i;
/* 021 */ /* createexternalrow(if (isnull(input[0, double])) null else input[0, double], if (isnull(input[1, int])) null else input[1, int], ... */
/* 022 */ boolean isNull = false;
/* 023 */ final Object[] values = new Object[2];
/* 024 */ /* if (isnull(input[0, double])) null else input[0, double] */
/* 025 */ /* isnull(input[0, double]) */
...
/* 053 */ if (!false && false) {
/* 054 */ /* null */
/* 055 */ final int value9 = -1;
/* 056 */ isNull6 = true;
/* 057 */ value6 = value9;
/* 058 */ } else {
...
/* 077 */ return mutableRow;
/* 078 */ }
/* 079 */ }
/* 080 */
```
After this PR, the code will be formatted like the following.
```java
/* 019 */ public java.lang.Object apply(java.lang.Object _i) {
/* 020 */ InternalRow i = (InternalRow) _i;
/* 021 */ /* createexternalrow(if (isnull(input[0, double])) null else input[0, double], if (isnull(input[1, int])) null else input[1, int], ... */
/* 022 */ boolean isNull = false;
/* 023 */ final Object[] values = new Object[2];
/* 024 */ /* if (isnull(input[0, double])) null else input[0, double] */
/* 025 */ /* isnull(input[0, double]) */
...
/* 053 */ if (!false && false) {
/* 054 */ /* null */
/* 055 */ final int value9 = -1;
/* 056 */ isNull6 = true;
/* 057 */ value6 = value9;
/* 058 */ } else {
...
/* 077 */ return mutableRow;
/* 078 */ }
/* 079 */ }
/* 080 */
```
Also, this issue fixes the following too. (Similar with [SPARK-14185](https://issues.apache.org/jira/browse/SPARK-14185))
```java
16/03/30 12:39:24 DEBUG WholeStageCodegen: /* 001 */ public Object generate(Object[] references) {
/* 002 */ return new GeneratedIterator(references);
/* 003 */ }
```
```java
16/03/30 12:46:32 DEBUG WholeStageCodegen:
/* 001 */ public Object generate(Object[] references) {
/* 002 */ return new GeneratedIterator(references);
/* 003 */ }
```
## How was this patch tested?
Pass the Jenkins tests (including new CodeFormatterSuite testcases.)
Author: Dongjoon Hyun <dongjoon@apache.org>
Closes #12072 from dongjoon-hyun/SPARK-14282.
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partition
## What changes were proposed in this pull request?
This pr is to add a config to control the maximum number of files as even small files have a non-trivial fixed cost. The current packing can put a lot of small files together which cases straggler tasks.
## How was this patch tested?
I added tests to check if many files get split into partitions in FileSourceStrategySuite.
Author: Takeshi YAMAMURO <linguin.m.s@gmail.com>
Closes #12068 from maropu/SPARK-14259.
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## What changes were proposed in this pull request?
This PR implements buildReader for text data source and enable it in the new data source code path.
## How was this patch tested?
Existing tests.
Author: Wenchen Fan <wenchen@databricks.com>
Closes #11934 from cloud-fan/text.
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#### What changes were proposed in this pull request?
This PR is to implement the following four Database-related DDL commands:
- `CREATE DATABASE|SCHEMA [IF NOT EXISTS] database_name`
- `DROP DATABASE [IF EXISTS] database_name [RESTRICT|CASCADE]`
- `DESCRIBE DATABASE [EXTENDED] db_name`
- `ALTER (DATABASE|SCHEMA) database_name SET DBPROPERTIES (property_name=property_value, ...)`
Another PR will be submitted to handle the unsupported commands. In the Database-related DDL commands, we will issue an error exception for `ALTER (DATABASE|SCHEMA) database_name SET OWNER [USER|ROLE] user_or_role`.
cc yhuai andrewor14 rxin Could you review the changes? Is it in the right direction? Thanks!
#### How was this patch tested?
Added a few test cases in `command/DDLSuite.scala` for testing DDL command execution in `SQLContext`. Since `HiveContext` also shares the same implementation, the existing test cases in `\hive` also verifies the correctness of these commands.
Author: gatorsmile <gatorsmile@gmail.com>
Author: xiaoli <lixiao1983@gmail.com>
Author: Xiao Li <xiaoli@Xiaos-MacBook-Pro.local>
Closes #12009 from gatorsmile/dbDDL.
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## What changes were proposed in this pull request?
This PR brings the support for chained Python UDFs, for example
```sql
select udf1(udf2(a))
select udf1(udf2(a) + 3)
select udf1(udf2(a) + udf3(b))
```
Also directly chained unary Python UDFs are put in single batch of Python UDFs, others may require multiple batches.
For example,
```python
>>> sqlContext.sql("select double(double(1))").explain()
== Physical Plan ==
WholeStageCodegen
: +- Project [pythonUDF#10 AS double(double(1))#9]
: +- INPUT
+- !BatchPythonEvaluation double(double(1)), [pythonUDF#10]
+- Scan OneRowRelation[]
>>> sqlContext.sql("select double(double(1) + double(2))").explain()
== Physical Plan ==
WholeStageCodegen
: +- Project [pythonUDF#19 AS double((double(1) + double(2)))#16]
: +- INPUT
+- !BatchPythonEvaluation double((pythonUDF#17 + pythonUDF#18)), [pythonUDF#17,pythonUDF#18,pythonUDF#19]
+- !BatchPythonEvaluation double(2), [pythonUDF#17,pythonUDF#18]
+- !BatchPythonEvaluation double(1), [pythonUDF#17]
+- Scan OneRowRelation[]
```
TODO: will support multiple unrelated Python UDFs in one batch (another PR).
## How was this patch tested?
Added new unit tests for chained UDFs.
Author: Davies Liu <davies@databricks.com>
Closes #12014 from davies/py_udfs.
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## What changes were proposed in this pull request?
This adds `debugCodegen` to the debug package for query execution.
## How was this patch tested?
Unit and manual testing. Output example:
```
scala> import org.apache.spark.sql.execution.debug._
import org.apache.spark.sql.execution.debug._
scala> sqlContext.range(100).groupBy("id").count().orderBy("id").debugCodegen()
Found 3 WholeStageCodegen subtrees.
== Subtree 1 / 3 ==
WholeStageCodegen
: +- TungstenAggregate(key=[id#0L], functions=[(count(1),mode=Partial,isDistinct=false)], output=[id#0L,count#9L])
: +- Range 0, 1, 1, 100, [id#0L]
Generated code:
/* 001 */ public Object generate(Object[] references) {
/* 002 */ return new GeneratedIterator(references);
/* 003 */ }
/* 004 */
/* 005 */ /** Codegened pipeline for:
/* 006 */ * TungstenAggregate(key=[id#0L], functions=[(count(1),mode=Partial,isDistinct=false)], output=[id#0L,count#9L])
/* 007 */ +- Range 0, 1, 1, 100, [id#0L]
/* 008 */ */
/* 009 */ final class GeneratedIterator extends org.apache.spark.sql.execution.BufferedRowIterator {
/* 010 */ private Object[] references;
/* 011 */ private boolean agg_initAgg;
/* 012 */ private org.apache.spark.sql.execution.aggregate.TungstenAggregate agg_plan;
/* 013 */ private org.apache.spark.sql.execution.UnsafeFixedWidthAggregationMap agg_hashMap;
/* 014 */ private org.apache.spark.sql.execution.UnsafeKVExternalSorter agg_sorter;
/* 015 */ private org.apache.spark.unsafe.KVIterator agg_mapIter;
/* 016 */ private org.apache.spark.sql.execution.metric.LongSQLMetric range_numOutputRows;
/* 017 */ private org.apache.spark.sql.execution.metric.LongSQLMetricValue range_metricValue;
/* 018 */ private boolean range_initRange;
/* 019 */ private long range_partitionEnd;
/* 020 */ private long range_number;
/* 021 */ private boolean range_overflow;
/* 022 */ private scala.collection.Iterator range_input;
/* 023 */ private UnsafeRow range_result;
/* 024 */ private org.apache.spark.sql.catalyst.expressions.codegen.BufferHolder range_holder;
/* 025 */ private org.apache.spark.sql.catalyst.expressions.codegen.UnsafeRowWriter range_rowWriter;
/* 026 */ private UnsafeRow agg_result;
/* 027 */ private org.apache.spark.sql.catalyst.expressions.codegen.BufferHolder agg_holder;
/* 028 */ private org.apache.spark.sql.catalyst.expressions.codegen.UnsafeRowWriter agg_rowWriter;
/* 029 */ private org.apache.spark.sql.catalyst.expressions.codegen.UnsafeRowJoiner agg_unsafeRowJoiner;
/* 030 */ private org.apache.spark.sql.execution.metric.LongSQLMetric wholestagecodegen_numOutputRows;
/* 031 */ private org.apache.spark.sql.execution.metric.LongSQLMetricValue wholestagecodegen_metricValue;
/* 032 */
/* 033 */ public GeneratedIterator(Object[] references) {
/* 034 */ this.references = references;
/* 035 */ }
/* 036 */
/* 037 */ public void init(scala.collection.Iterator inputs[]) {
/* 038 */ agg_initAgg = false;
/* 039 */ this.agg_plan = (org.apache.spark.sql.execution.aggregate.TungstenAggregate) references[0];
/* 040 */ agg_hashMap = agg_plan.createHashMap();
/* 041 */
/* 042 */ this.range_numOutputRows = (org.apache.spark.sql.execution.metric.LongSQLMetric) references[1];
/* 043 */ range_metricValue = (org.apache.spark.sql.execution.metric.LongSQLMetricValue) range_numOutputRows.localValue();
/* 044 */ range_initRange = false;
/* 045 */ range_partitionEnd = 0L;
/* 046 */ range_number = 0L;
/* 047 */ range_overflow = false;
/* 048 */ range_input = inputs[0];
/* 049 */ range_result = new UnsafeRow(1);
/* 050 */ this.range_holder = new org.apache.spark.sql.catalyst.expressions.codegen.BufferHolder(range_result, 0);
/* 051 */ this.range_rowWriter = new org.apache.spark.sql.catalyst.expressions.codegen.UnsafeRowWriter(range_holder, 1);
/* 052 */ agg_result = new UnsafeRow(1);
/* 053 */ this.agg_holder = new org.apache.spark.sql.catalyst.expressions.codegen.BufferHolder(agg_result, 0);
/* 054 */ this.agg_rowWriter = new org.apache.spark.sql.catalyst.expressions.codegen.UnsafeRowWriter(agg_holder, 1);
/* 055 */ agg_unsafeRowJoiner = agg_plan.createUnsafeJoiner();
/* 056 */ this.wholestagecodegen_numOutputRows = (org.apache.spark.sql.execution.metric.LongSQLMetric) references[2];
/* 057 */ wholestagecodegen_metricValue = (org.apache.spark.sql.execution.metric.LongSQLMetricValue) wholestagecodegen_numOutputRows.localValue();
/* 058 */ }
/* 059 */
/* 060 */ private void agg_doAggregateWithKeys() throws java.io.IOException {
/* 061 */ /*** PRODUCE: Range 0, 1, 1, 100, [id#0L] */
/* 062 */
/* 063 */ // initialize Range
/* 064 */ if (!range_initRange) {
/* 065 */ range_initRange = true;
/* 066 */ if (range_input.hasNext()) {
/* 067 */ initRange(((InternalRow) range_input.next()).getInt(0));
/* 068 */ } else {
/* 069 */ return;
/* 070 */ }
/* 071 */ }
/* 072 */
/* 073 */ while (!range_overflow && range_number < range_partitionEnd) {
/* 074 */ long range_value = range_number;
/* 075 */ range_number += 1L;
/* 076 */ if (range_number < range_value ^ 1L < 0) {
/* 077 */ range_overflow = true;
/* 078 */ }
/* 079 */
/* 080 */ /*** CONSUME: TungstenAggregate(key=[id#0L], functions=[(count(1),mode=Partial,isDistinct=false)], output=[id#0L,count#9L]) */
/* 081 */
/* 082 */ // generate grouping key
/* 083 */ agg_rowWriter.write(0, range_value);
/* 084 */ /* hash(input[0, bigint], 42) */
/* 085 */ int agg_value1 = 42;
/* 086 */
/* 087 */ agg_value1 = org.apache.spark.unsafe.hash.Murmur3_x86_32.hashLong(range_value, agg_value1);
/* 088 */ UnsafeRow agg_aggBuffer = null;
/* 089 */ if (true) {
/* 090 */ // try to get the buffer from hash map
/* 091 */ agg_aggBuffer = agg_hashMap.getAggregationBufferFromUnsafeRow(agg_result, agg_value1);
/* 092 */ }
/* 093 */ if (agg_aggBuffer == null) {
/* 094 */ if (agg_sorter == null) {
/* 095 */ agg_sorter = agg_hashMap.destructAndCreateExternalSorter();
/* 096 */ } else {
/* 097 */ agg_sorter.merge(agg_hashMap.destructAndCreateExternalSorter());
/* 098 */ }
/* 099 */
/* 100 */ // the hash map had be spilled, it should have enough memory now,
/* 101 */ // try to allocate buffer again.
/* 102 */ agg_aggBuffer = agg_hashMap.getAggregationBufferFromUnsafeRow(agg_result, agg_value1);
/* 103 */ if (agg_aggBuffer == null) {
/* 104 */ // failed to allocate the first page
/* 105 */ throw new OutOfMemoryError("No enough memory for aggregation");
/* 106 */ }
/* 107 */ }
/* 108 */
/* 109 */ // evaluate aggregate function
/* 110 */ /* (input[0, bigint] + 1) */
/* 111 */ /* input[0, bigint] */
/* 112 */ long agg_value4 = agg_aggBuffer.getLong(0);
/* 113 */
/* 114 */ long agg_value3 = -1L;
/* 115 */ agg_value3 = agg_value4 + 1L;
/* 116 */ // update aggregate buffer
/* 117 */ agg_aggBuffer.setLong(0, agg_value3);
/* 118 */
/* 119 */ if (shouldStop()) return;
/* 120 */ }
/* 121 */
/* 122 */ agg_mapIter = agg_plan.finishAggregate(agg_hashMap, agg_sorter);
/* 123 */ }
/* 124 */
/* 125 */ private void initRange(int idx) {
/* 126 */ java.math.BigInteger index = java.math.BigInteger.valueOf(idx);
/* 127 */ java.math.BigInteger numSlice = java.math.BigInteger.valueOf(1L);
/* 128 */ java.math.BigInteger numElement = java.math.BigInteger.valueOf(100L);
/* 129 */ java.math.BigInteger step = java.math.BigInteger.valueOf(1L);
/* 130 */ java.math.BigInteger start = java.math.BigInteger.valueOf(0L);
/* 131 */
/* 132 */ java.math.BigInteger st = index.multiply(numElement).divide(numSlice).multiply(step).add(start);
/* 133 */ if (st.compareTo(java.math.BigInteger.valueOf(Long.MAX_VALUE)) > 0) {
/* 134 */ range_number = Long.MAX_VALUE;
/* 135 */ } else if (st.compareTo(java.math.BigInteger.valueOf(Long.MIN_VALUE)) < 0) {
/* 136 */ range_number = Long.MIN_VALUE;
/* 137 */ } else {
/* 138 */ range_number = st.longValue();
/* 139 */ }
/* 140 */
/* 141 */ java.math.BigInteger end = index.add(java.math.BigInteger.ONE).multiply(numElement).divide(numSlice)
/* 142 */ .multiply(step).add(start);
/* 143 */ if (end.compareTo(java.math.BigInteger.valueOf(Long.MAX_VALUE)) > 0) {
/* 144 */ range_partitionEnd = Long.MAX_VALUE;
/* 145 */ } else if (end.compareTo(java.math.BigInteger.valueOf(Long.MIN_VALUE)) < 0) {
/* 146 */ range_partitionEnd = Long.MIN_VALUE;
/* 147 */ } else {
/* 148 */ range_partitionEnd = end.longValue();
/* 149 */ }
/* 150 */
/* 151 */ range_metricValue.add((range_partitionEnd - range_number) / 1L);
/* 152 */ }
/* 153 */
/* 154 */ protected void processNext() throws java.io.IOException {
/* 155 */ /*** PRODUCE: TungstenAggregate(key=[id#0L], functions=[(count(1),mode=Partial,isDistinct=false)], output=[id#0L,count#9L]) */
/* 156 */
/* 157 */ if (!agg_initAgg) {
/* 158 */ agg_initAgg = true;
/* 159 */ agg_doAggregateWithKeys();
/* 160 */ }
/* 161 */
/* 162 */ // output the result
/* 163 */ while (agg_mapIter.next()) {
/* 164 */ wholestagecodegen_metricValue.add(1);
/* 165 */ UnsafeRow agg_aggKey = (UnsafeRow) agg_mapIter.getKey();
/* 166 */ UnsafeRow agg_aggBuffer1 = (UnsafeRow) agg_mapIter.getValue();
/* 167 */
/* 168 */ UnsafeRow agg_resultRow = agg_unsafeRowJoiner.join(agg_aggKey, agg_aggBuffer1);
/* 169 */
/* 170 */ /*** CONSUME: WholeStageCodegen */
/* 171 */
/* 172 */ append(agg_resultRow);
/* 173 */
/* 174 */ if (shouldStop()) return;
/* 175 */ }
/* 176 */
/* 177 */ agg_mapIter.close();
/* 178 */ if (agg_sorter == null) {
/* 179 */ agg_hashMap.free();
/* 180 */ }
/* 181 */ }
/* 182 */ }
== Subtree 2 / 3 ==
WholeStageCodegen
: +- Sort [id#0L ASC], true, 0
: +- INPUT
+- Exchange rangepartitioning(id#0L ASC, 200), None
+- WholeStageCodegen
: +- TungstenAggregate(key=[id#0L], functions=[(count(1),mode=Final,isDistinct=false)], output=[id#0L,count#4L])
: +- INPUT
+- Exchange hashpartitioning(id#0L, 200), None
+- WholeStageCodegen
: +- TungstenAggregate(key=[id#0L], functions=[(count(1),mode=Partial,isDistinct=false)], output=[id#0L,count#9L])
: +- Range 0, 1, 1, 100, [id#0L]
Generated code:
/* 001 */ public Object generate(Object[] references) {
/* 002 */ return new GeneratedIterator(references);
/* 003 */ }
/* 004 */
/* 005 */ /** Codegened pipeline for:
/* 006 */ * Sort [id#0L ASC], true, 0
/* 007 */ +- INPUT
/* 008 */ */
/* 009 */ final class GeneratedIterator extends org.apache.spark.sql.execution.BufferedRowIterator {
/* 010 */ private Object[] references;
/* 011 */ private boolean sort_needToSort;
/* 012 */ private org.apache.spark.sql.execution.Sort sort_plan;
/* 013 */ private org.apache.spark.sql.execution.UnsafeExternalRowSorter sort_sorter;
/* 014 */ private org.apache.spark.executor.TaskMetrics sort_metrics;
/* 015 */ private scala.collection.Iterator<UnsafeRow> sort_sortedIter;
/* 016 */ private scala.collection.Iterator inputadapter_input;
/* 017 */ private org.apache.spark.sql.execution.metric.LongSQLMetric sort_dataSize;
/* 018 */ private org.apache.spark.sql.execution.metric.LongSQLMetricValue sort_metricValue;
/* 019 */ private org.apache.spark.sql.execution.metric.LongSQLMetric sort_spillSize;
/* 020 */ private org.apache.spark.sql.execution.metric.LongSQLMetricValue sort_metricValue1;
/* 021 */
/* 022 */ public GeneratedIterator(Object[] references) {
/* 023 */ this.references = references;
/* 024 */ }
/* 025 */
/* 026 */ public void init(scala.collection.Iterator inputs[]) {
/* 027 */ sort_needToSort = true;
/* 028 */ this.sort_plan = (org.apache.spark.sql.execution.Sort) references[0];
/* 029 */ sort_sorter = sort_plan.createSorter();
/* 030 */ sort_metrics = org.apache.spark.TaskContext.get().taskMetrics();
/* 031 */
/* 032 */ inputadapter_input = inputs[0];
/* 033 */ this.sort_dataSize = (org.apache.spark.sql.execution.metric.LongSQLMetric) references[1];
/* 034 */ sort_metricValue = (org.apache.spark.sql.execution.metric.LongSQLMetricValue) sort_dataSize.localValue();
/* 035 */ this.sort_spillSize = (org.apache.spark.sql.execution.metric.LongSQLMetric) references[2];
/* 036 */ sort_metricValue1 = (org.apache.spark.sql.execution.metric.LongSQLMetricValue) sort_spillSize.localValue();
/* 037 */ }
/* 038 */
/* 039 */ private void sort_addToSorter() throws java.io.IOException {
/* 040 */ /*** PRODUCE: INPUT */
/* 041 */
/* 042 */ while (inputadapter_input.hasNext()) {
/* 043 */ InternalRow inputadapter_row = (InternalRow) inputadapter_input.next();
/* 044 */ /*** CONSUME: Sort [id#0L ASC], true, 0 */
/* 045 */
/* 046 */ sort_sorter.insertRow((UnsafeRow)inputadapter_row);
/* 047 */ if (shouldStop()) return;
/* 048 */ }
/* 049 */
/* 050 */ }
/* 051 */
/* 052 */ protected void processNext() throws java.io.IOException {
/* 053 */ /*** PRODUCE: Sort [id#0L ASC], true, 0 */
/* 054 */ if (sort_needToSort) {
/* 055 */ sort_addToSorter();
/* 056 */ Long sort_spillSizeBefore = sort_metrics.memoryBytesSpilled();
/* 057 */ sort_sortedIter = sort_sorter.sort();
/* 058 */ sort_metricValue.add(sort_sorter.getPeakMemoryUsage());
/* 059 */ sort_metricValue1.add(sort_metrics.memoryBytesSpilled() - sort_spillSizeBefore);
/* 060 */ sort_metrics.incPeakExecutionMemory(sort_sorter.getPeakMemoryUsage());
/* 061 */ sort_needToSort = false;
/* 062 */ }
/* 063 */
/* 064 */ while (sort_sortedIter.hasNext()) {
/* 065 */ UnsafeRow sort_outputRow = (UnsafeRow)sort_sortedIter.next();
/* 066 */
/* 067 */ /*** CONSUME: WholeStageCodegen */
/* 068 */
/* 069 */ append(sort_outputRow);
/* 070 */
/* 071 */ if (shouldStop()) return;
/* 072 */ }
/* 073 */ }
/* 074 */ }
== Subtree 3 / 3 ==
WholeStageCodegen
: +- TungstenAggregate(key=[id#0L], functions=[(count(1),mode=Final,isDistinct=false)], output=[id#0L,count#4L])
: +- INPUT
+- Exchange hashpartitioning(id#0L, 200), None
+- WholeStageCodegen
: +- TungstenAggregate(key=[id#0L], functions=[(count(1),mode=Partial,isDistinct=false)], output=[id#0L,count#9L])
: +- Range 0, 1, 1, 100, [id#0L]
Generated code:
/* 001 */ public Object generate(Object[] references) {
/* 002 */ return new GeneratedIterator(references);
/* 003 */ }
/* 004 */
/* 005 */ /** Codegened pipeline for:
/* 006 */ * TungstenAggregate(key=[id#0L], functions=[(count(1),mode=Final,isDistinct=false)], output=[id#0L,count#4L])
/* 007 */ +- INPUT
/* 008 */ */
/* 009 */ final class GeneratedIterator extends org.apache.spark.sql.execution.BufferedRowIterator {
/* 010 */ private Object[] references;
/* 011 */ private boolean agg_initAgg;
/* 012 */ private org.apache.spark.sql.execution.aggregate.TungstenAggregate agg_plan;
/* 013 */ private org.apache.spark.sql.execution.UnsafeFixedWidthAggregationMap agg_hashMap;
/* 014 */ private org.apache.spark.sql.execution.UnsafeKVExternalSorter agg_sorter;
/* 015 */ private org.apache.spark.unsafe.KVIterator agg_mapIter;
/* 016 */ private scala.collection.Iterator inputadapter_input;
/* 017 */ private UnsafeRow agg_result;
/* 018 */ private org.apache.spark.sql.catalyst.expressions.codegen.BufferHolder agg_holder;
/* 019 */ private org.apache.spark.sql.catalyst.expressions.codegen.UnsafeRowWriter agg_rowWriter;
/* 020 */ private UnsafeRow agg_result1;
/* 021 */ private org.apache.spark.sql.catalyst.expressions.codegen.BufferHolder agg_holder1;
/* 022 */ private org.apache.spark.sql.catalyst.expressions.codegen.UnsafeRowWriter agg_rowWriter1;
/* 023 */ private org.apache.spark.sql.execution.metric.LongSQLMetric wholestagecodegen_numOutputRows;
/* 024 */ private org.apache.spark.sql.execution.metric.LongSQLMetricValue wholestagecodegen_metricValue;
/* 025 */
/* 026 */ public GeneratedIterator(Object[] references) {
/* 027 */ this.references = references;
/* 028 */ }
/* 029 */
/* 030 */ public void init(scala.collection.Iterator inputs[]) {
/* 031 */ agg_initAgg = false;
/* 032 */ this.agg_plan = (org.apache.spark.sql.execution.aggregate.TungstenAggregate) references[0];
/* 033 */ agg_hashMap = agg_plan.createHashMap();
/* 034 */
/* 035 */ inputadapter_input = inputs[0];
/* 036 */ agg_result = new UnsafeRow(1);
/* 037 */ this.agg_holder = new org.apache.spark.sql.catalyst.expressions.codegen.BufferHolder(agg_result, 0);
/* 038 */ this.agg_rowWriter = new org.apache.spark.sql.catalyst.expressions.codegen.UnsafeRowWriter(agg_holder, 1);
/* 039 */ agg_result1 = new UnsafeRow(2);
/* 040 */ this.agg_holder1 = new org.apache.spark.sql.catalyst.expressions.codegen.BufferHolder(agg_result1, 0);
/* 041 */ this.agg_rowWriter1 = new org.apache.spark.sql.catalyst.expressions.codegen.UnsafeRowWriter(agg_holder1, 2);
/* 042 */ this.wholestagecodegen_numOutputRows = (org.apache.spark.sql.execution.metric.LongSQLMetric) references[1];
/* 043 */ wholestagecodegen_metricValue = (org.apache.spark.sql.execution.metric.LongSQLMetricValue) wholestagecodegen_numOutputRows.localValue();
/* 044 */ }
/* 045 */
/* 046 */ private void agg_doAggregateWithKeys() throws java.io.IOException {
/* 047 */ /*** PRODUCE: INPUT */
/* 048 */
/* 049 */ while (inputadapter_input.hasNext()) {
/* 050 */ InternalRow inputadapter_row = (InternalRow) inputadapter_input.next();
/* 051 */ /*** CONSUME: TungstenAggregate(key=[id#0L], functions=[(count(1),mode=Final,isDistinct=false)], output=[id#0L,count#4L]) */
/* 052 */ /* input[0, bigint] */
/* 053 */ long inputadapter_value = inputadapter_row.getLong(0);
/* 054 */ /* input[1, bigint] */
/* 055 */ long inputadapter_value1 = inputadapter_row.getLong(1);
/* 056 */
/* 057 */ // generate grouping key
/* 058 */ agg_rowWriter.write(0, inputadapter_value);
/* 059 */ /* hash(input[0, bigint], 42) */
/* 060 */ int agg_value1 = 42;
/* 061 */
/* 062 */ agg_value1 = org.apache.spark.unsafe.hash.Murmur3_x86_32.hashLong(inputadapter_value, agg_value1);
/* 063 */ UnsafeRow agg_aggBuffer = null;
/* 064 */ if (true) {
/* 065 */ // try to get the buffer from hash map
/* 066 */ agg_aggBuffer = agg_hashMap.getAggregationBufferFromUnsafeRow(agg_result, agg_value1);
/* 067 */ }
/* 068 */ if (agg_aggBuffer == null) {
/* 069 */ if (agg_sorter == null) {
/* 070 */ agg_sorter = agg_hashMap.destructAndCreateExternalSorter();
/* 071 */ } else {
/* 072 */ agg_sorter.merge(agg_hashMap.destructAndCreateExternalSorter());
/* 073 */ }
/* 074 */
/* 075 */ // the hash map had be spilled, it should have enough memory now,
/* 076 */ // try to allocate buffer again.
/* 077 */ agg_aggBuffer = agg_hashMap.getAggregationBufferFromUnsafeRow(agg_result, agg_value1);
/* 078 */ if (agg_aggBuffer == null) {
/* 079 */ // failed to allocate the first page
/* 080 */ throw new OutOfMemoryError("No enough memory for aggregation");
/* 081 */ }
/* 082 */ }
/* 083 */
/* 084 */ // evaluate aggregate function
/* 085 */ /* (input[0, bigint] + input[2, bigint]) */
/* 086 */ /* input[0, bigint] */
/* 087 */ long agg_value4 = agg_aggBuffer.getLong(0);
/* 088 */
/* 089 */ long agg_value3 = -1L;
/* 090 */ agg_value3 = agg_value4 + inputadapter_value1;
/* 091 */ // update aggregate buffer
/* 092 */ agg_aggBuffer.setLong(0, agg_value3);
/* 093 */ if (shouldStop()) return;
/* 094 */ }
/* 095 */
/* 096 */ agg_mapIter = agg_plan.finishAggregate(agg_hashMap, agg_sorter);
/* 097 */ }
/* 098 */
/* 099 */ protected void processNext() throws java.io.IOException {
/* 100 */ /*** PRODUCE: TungstenAggregate(key=[id#0L], functions=[(count(1),mode=Final,isDistinct=false)], output=[id#0L,count#4L]) */
/* 101 */
/* 102 */ if (!agg_initAgg) {
/* 103 */ agg_initAgg = true;
/* 104 */ agg_doAggregateWithKeys();
/* 105 */ }
/* 106 */
/* 107 */ // output the result
/* 108 */ while (agg_mapIter.next()) {
/* 109 */ wholestagecodegen_metricValue.add(1);
/* 110 */ UnsafeRow agg_aggKey = (UnsafeRow) agg_mapIter.getKey();
/* 111 */ UnsafeRow agg_aggBuffer1 = (UnsafeRow) agg_mapIter.getValue();
/* 112 */
/* 113 */ /* input[0, bigint] */
/* 114 */ long agg_value6 = agg_aggKey.getLong(0);
/* 115 */ /* input[0, bigint] */
/* 116 */ long agg_value7 = agg_aggBuffer1.getLong(0);
/* 117 */
/* 118 */ /*** CONSUME: WholeStageCodegen */
/* 119 */
/* 120 */ agg_rowWriter1.write(0, agg_value6);
/* 121 */
/* 122 */ agg_rowWriter1.write(1, agg_value7);
/* 123 */ append(agg_result1);
/* 124 */
/* 125 */ if (shouldStop()) return;
/* 126 */ }
/* 127 */
/* 128 */ agg_mapIter.close();
/* 129 */ if (agg_sorter == null) {
/* 130 */ agg_hashMap.free();
/* 131 */ }
/* 132 */ }
/* 133 */ }
```
rxin
Author: Eric Liang <ekl@databricks.com>
Closes #12025 from ericl/spark-14227.
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## What changes were proposed in this pull request?
This PR is a simple fix for an exception message to print `string[]` content correctly.
```java
String[] colPath = requestedSchema.getPaths().get(i);
...
- throw new IOException("Required column is missing in data file. Col: " + colPath);
+ throw new IOException("Required column is missing in data file. Col: " + Arrays.toString(colPath));
```
## How was this patch tested?
Manual.
Author: Dongjoon Hyun <dongjoon@apache.org>
Closes #12041 from dongjoon-hyun/fix_exception_message_with_string_array.
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## What changes were proposed in this pull request?
Renames SQL option `spark.sql.parquet.fileScan` since now all `HadoopFsRelation` based data sources are being migrated to `FileScanRDD` code path.
## How was this patch tested?
None.
Author: Cheng Lian <lian@databricks.com>
Closes #12003 from liancheng/spark-14208-option-renaming.
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## What changes were proposed in this pull request?
This PR implements buildReader for json data source and enable it in the new data source code path.
## How was this patch tested?
existing tests
Author: Wenchen Fan <wenchen@databricks.com>
Closes #11960 from cloud-fan/json.
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## What changes were proposed in this pull request?
This adds a metric to parquet scans that measures the time in just the scan phase. This is
only possible when the scan returns ColumnarBatches, otherwise the overhead is too high.
This combined with the pipeline metric lets us easily see what percent of the time was
in the scan.
Author: Nong Li <nong@databricks.com>
Closes #12007 from nongli/spark-14210.
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## What changes were proposed in this pull request?
This improves the Filter codegen for NULLs by deferring loading the values for IsNotNull.
Instead of generating code like:
boolean isNull = ...
int value = ...
if (isNull) continue;
we will generate:
boolean isNull = ...
if (isNull) continue;
int value = ...
This is useful since retrieving the values can be non-trivial (they can be dictionary encoded
among other things). This currently only works when the attribute comes from the column batch
but could be extended to other cases in the future.
## How was this patch tested?
On tpcds q55, this fixes the regression from introducing the IsNotNull predicates.
```
TPCDS Snappy: Best/Avg Time(ms) Rate(M/s) Per Row(ns)
--------------------------------------------------------------------------------
q55 4564 / 5036 25.2 39.6
q55 4064 / 4340 28.3 35.3
```
Author: Nong Li <nong@databricks.com>
Closes #11792 from nongli/spark-13981.
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## What changes were proposed in this pull request?
After DataFrame and Dataset are merged, the trait `Queryable` becomes unnecessary as it has only one implementation. We should remove it.
## How was this patch tested?
existing tests.
Author: Wenchen Fan <wenchen@databricks.com>
Closes #12001 from cloud-fan/df-ds.
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## What changes were proposed in this pull request?
Session catalog was added in #11750. However, it doesn't really support temporary functions properly; right now we only store the metadata in the form of `CatalogFunction`, but this doesn't make sense for temporary functions because there is no class name.
This patch moves the `FunctionRegistry` into the `SessionCatalog`. With this, the user can call `catalog.createTempFunction` and `catalog.lookupFunction` to use the function they registered previously. This is currently still dead code, however.
## How was this patch tested?
`SessionCatalogSuite`.
Author: Andrew Or <andrew@databricks.com>
Closes #11972 from andrewor14/temp-functions.
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## What changes were proposed in this pull request?
Extract the workaround for HADOOP-10622 introduced by #11940 into UninterruptibleThread so that we can test and reuse it.
## How was this patch tested?
Unit tests
Author: Shixiong Zhu <shixiong@databricks.com>
Closes #11971 from zsxwing/uninterrupt.
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## What changes were proposed in this pull request?
This patch addresses the remaining comments left in #11750 and #11918 after they are merged. For a full list of changes in this patch, just trace the commits.
## How was this patch tested?
`SessionCatalogSuite` and `CatalogTestCases`
Author: Andrew Or <andrew@databricks.com>
Closes #12006 from andrewor14/session-catalog-followup.
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#### What changes were proposed in this pull request?
This PR adds all the current Spark SQL DDL commands to the new ANTLR 4 based SQL parser.
I have found a few inconsistencies in the current commands:
- Function has an alias field. This is actually the class name of the function.
- Partition specifications should contain nulls in some commands, and contain `None`s in others.
- `AlterTableSkewedLocation`: Should defines which columns have skewed values, and should allow us to define storage for each skewed combination of values. We currently only allow one value per field.
- `AlterTableSetFileFormat`: Should only have one file format, it currently supports both.
I have implemented all these comments like they were, and I propose to improve them in follow-up PRs.
#### How was this patch tested?
The existing DDLCommandSuite.
cc rxin andrewor14 yhuai
Author: Herman van Hovell <hvanhovell@questtec.nl>
Closes #12011 from hvanhovell/SPARK-14086.
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## What changes were proposed in this pull request?
Currently, for the key that can not fit within a long, we build a hash map for UnsafeHashedRelation, it's converted to BytesToBytesMap after serialization and deserialization. We should build a BytesToBytesMap directly to have better memory efficiency.
In order to do that, BytesToBytesMap should support multiple (K,V) pair with the same K, Location.putNewKey() is renamed to Location.append(), which could append multiple values for the same key (same Location). `Location.newValue()` is added to find the next value for the same key.
## How was this patch tested?
Existing tests. Added benchmark for broadcast hash join with duplicated keys.
Author: Davies Liu <davies@databricks.com>
Closes #11870 from davies/map2.
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### What changes were proposed in this pull request?
The current ANTLR3 parser is quite complex to maintain and suffers from code blow-ups. This PR introduces a new parser that is based on ANTLR4.
This parser is based on the [Presto's SQL parser](https://github.com/facebook/presto/blob/master/presto-parser/src/main/antlr4/com/facebook/presto/sql/parser/SqlBase.g4). The current implementation can parse and create Catalyst and SQL plans. Large parts of the HiveQl DDL and some of the DML functionality is currently missing, the plan is to add this in follow-up PRs.
This PR is a work in progress, and work needs to be done in the following area's:
- [x] Error handling should be improved.
- [x] Documentation should be improved.
- [x] Multi-Insert needs to be tested.
- [ ] Naming and package locations.
### How was this patch tested?
Catalyst and SQL unit tests.
Author: Herman van Hovell <hvanhovell@questtec.nl>
Closes #11557 from hvanhovell/ngParser.
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"Alter Database"
#### What changes were proposed in this pull request?
This PR is to provide native parsing support for two DDL commands: ```Describe Database``` and ```Alter Database Set Properties```
Based on the Hive DDL document:
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL
##### 1. ALTER DATABASE
**Syntax:**
```SQL
ALTER (DATABASE|SCHEMA) database_name SET DBPROPERTIES (property_name=property_value, ...)
```
- `ALTER DATABASE` is to add new (key, value) pairs into `DBPROPERTIES`
##### 2. DESCRIBE DATABASE
**Syntax:**
```SQL
DESCRIBE DATABASE [EXTENDED] db_name
```
- `DESCRIBE DATABASE` shows the name of the database, its comment (if one has been set), and its root location on the filesystem. When `extended` is true, it also shows the database's properties
#### How was this patch tested?
Added the related test cases to `DDLCommandSuite`
Author: gatorsmile <gatorsmile@gmail.com>
Author: xiaoli <lixiao1983@gmail.com>
Author: Xiao Li <xiaoli@Xiaos-MacBook-Pro.local>
This patch had conflicts when merged, resolved by
Committer: Yin Huai <yhuai@databricks.com>
Closes #11977 from gatorsmile/parseAlterDatabase.
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## What changes were proposed in this pull request?
JIRA: https://issues.apache.org/jira/browse/SPARK-14157
We only parse create function command. In order to support native drop function command, we need to parse it too.
From Hive [manual](https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL#LanguageManualDDL-Create/Drop/ReloadFunction), the drop function command has syntax as:
DROP [TEMPORARY] FUNCTION [IF EXISTS] function_name;
## How was this patch tested?
Added test into `DDLCommandSuite`.
Author: Liang-Chi Hsieh <simonh@tw.ibm.com>
Closes #11959 from viirya/parse-drop-func.
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## What changes were proposed in this pull request?
This PR implements `FileFormat.buildReader()` for our ORC data source. It also fixed several minor styling issues related to `HadoopFsRelation` planning code path.
Note that `OrcNewInputFormat` doesn't rely on `OrcNewSplit` for creating `OrcRecordReader`s, plain `FileSplit` is just fine. That's why we can simply create the record reader with the help of `OrcNewInputFormat` and `FileSplit`.
## How was this patch tested?
Existing test cases should do the work
Author: Cheng Lian <lian@databricks.com>
Closes #11936 from liancheng/spark-14116-build-reader-for-orc.
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### What changes were proposed in this pull request?
Based on the Hive DDL document https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL
The syntax of DDL command for Drop Database is
```SQL
DROP (DATABASE|SCHEMA) [IF EXISTS] database_name [RESTRICT|CASCADE];
```
- If `IF EXISTS` is not specified, the default behavior is to issue a warning message if `database_name` does't exist
- `RESTRICT` is the default behavior.
This PR is to provide a native parsing support for `DROP DATABASE`.
#### How was this patch tested?
Added a test case `DDLCommandSuite`
Author: gatorsmile <gatorsmile@gmail.com>
Closes #11962 from gatorsmile/parseDropDatabase.
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## What changes were proposed in this pull request?
1. merge consumeChild into consume()
2. always generate code for input variables and UnsafeRow, a plan can use eight of them.
## How was this patch tested?
Existing tests.
Author: Davies Liu <davies@databricks.com>
Closes #11975 from davies/gen_refactor.
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## What changes were proposed in this pull request?
This PR fixes some newly added java-lint errors(unused-imports, line-lengsth).
## How was this patch tested?
Pass the Jenkins tests.
Author: Dongjoon Hyun <dongjoon@apache.org>
Closes #11968 from dongjoon-hyun/SPARK-14167.
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FileSystem API
## What changes were proposed in this pull request?
HDFSMetadataLog uses newer FileContext API to achieve atomic renaming. However, FileContext implementations may not exist for many scheme for which there may be FileSystem implementations. In those cases, rather than failing completely, we should fallback to the FileSystem based implementation, and log warning that there may be file consistency issues in case the log directory is concurrently modified.
In addition I have also added more tests to increase the code coverage.
## How was this patch tested?
Unit test.
Tested on cluster with custom file system.
Author: Tathagata Das <tathagata.das1565@gmail.com>
Closes #11925 from tdas/SPARK-14109.
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DataFrameReaderWriterSuite
## What changes were proposed in this pull request?
There is a potential dead-lock in Hadoop Shell.runCommand before 2.5.0 ([HADOOP-10622](https://issues.apache.org/jira/browse/HADOOP-10622)). If we interrupt some thread running Shell.runCommand, we may hit this issue.
This PR adds some protecion to prevent from interrupting the microBatchThread when we may run into Shell.runCommand. There are two places will call Shell.runCommand now:
- offsetLog.add
- FileStreamSource.getOffset
They will create a file using HDFS API and call Shell.runCommand to set the file permission.
## How was this patch tested?
Existing unit tests.
Author: Shixiong Zhu <shixiong@databricks.com>
Closes #11940 from zsxwing/workaround-for-HADOOP-10622.
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during parquet reader initialization
## What changes were proposed in this pull request?
This PR is a minor cleanup task as part of https://issues.apache.org/jira/browse/SPARK-14008 to explicitly identify/catch the `UnsupportedOperationException` while initializing the vectorized parquet reader. Other exceptions will simply be thrown back to `SqlNewHadoopPartition`.
## How was this patch tested?
N/A (cleanup only; no new functionality added)
Author: Sameer Agarwal <sameer@databricks.com>
Closes #11950 from sameeragarwal/parquet-cleanup.
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## What changes were proposed in this pull request?
As we have `CreateArray` and `CreateStruct`, we should also have `CreateMap`. This PR adds the `CreateMap` expression, and the DataFrame API, and python API.
## How was this patch tested?
various new tests.
Author: Wenchen Fan <wenchen@databricks.com>
Closes #11879 from cloud-fan/create_map.
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## What changes were proposed in this pull request?
We ran into a problem today debugging some class loading problem during deserialization, and JVM was masking the underlying exception which made it very difficult to debug. We can however log the exceptions using try/catch ourselves in serialization/deserialization. The good thing is that all these methods are already using Utils.tryOrIOException, so we can just put the try catch and logging in a single place.
## How was this patch tested?
A logging change with a manual test.
Author: Reynold Xin <rxin@databricks.com>
Closes #11951 from rxin/SPARK-14149.
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