soumyakanti3578 commented on code in PR #5196:
URL: https://github.com/apache/hive/pull/5196#discussion_r1638520483
##########
iceberg/iceberg-handler/src/test/results/positive/delete_iceberg_mixed.q.out:
##########
@@ -84,17 +84,17 @@ Stage-4
<-Reducer 2 [CONTAINS]
File Output Operator [FS_46]
table:{"name:":"default.ice01"}
- Select Operator [SEL_44] (rows=3 width=295)
+ Select Operator [SEL_44] (rows=3 width=266)
Output:["_col0","_col1","_col2","_col3","_col4","_col5"]
- Merge Join Operator [MERGEJOIN_43] (rows=3 width=295)
+ Merge Join Operator [MERGEJOIN_43] (rows=3 width=266)
Conds:RS_57._col4=RS_63._col0(Left
Semi),Output:["_col0","_col1","_col2","_col3","_col4","_col5"]
<-Map 1 [SIMPLE_EDGE] vectorized
SHUFFLE [RS_57]
PartitionCols:_col4
- Select Operator [SEL_55] (rows=5 width=295)
+ Select Operator [SEL_55] (rows=6 width=280)
Review Comment:
It looks like there should be 6 rows instead of 5.
Here's the insert statement, `insert into ice01 values (1, 'ABC'),(2,
'CBS'),(3, null),(4, 'POPI'),(5, 'AQWR'),(6, 'POIU'),(9, null),(8,
'POIKL'),(10, 'YUIO');`
And the delete predicate is: `where id>4 OR id=2`. That gives us 6 rows with
ids 2, 5, 6, 9, 8, 10.
Also, I believe row counts are just estimated based on stats? I could be
wrong though.
##########
packaging/pom.xml:
##########
@@ -173,6 +173,10 @@
\Qhttps://www.eclipse.org/org/documents/epl-v10.php\E
\Qhttp://www.eclipse.org/org/documents/epl-v10.php\E
</EPL-1.0>
+ <EPL-2.0>
+
\Qhttps://raw.githubusercontent.com/locationtech/jts/master/LICENSE_EPLv2.txt\E
+ \Qhttps://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt\E
+ </EPL-2.0>
Review Comment:
Without this the compilation fails with:
`21:54:57 [ERROR] Failed to execute goal
org.codehaus.mojo:license-maven-plugin:2.3.0:download-licenses (license-fetch)
on project hive-packaging: Execution license-fetch of goal
org.codehaus.mojo:license-maven-plugin:2.3.0:download-licenses failed: URL
'https://raw.githubusercontent.com/locationtech/jts/master/LICENSE_EPLv2.txt'
should belong to licenseUrlFileName having key
'eclipse-public-license-v.-2.0-epl-2.0.txt' together with URLs
'https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt' -> [Help 1]
`
I'm not sure if there's another way to resolve this.
##########
ql/src/java/org/apache/hadoop/hive/ql/parse/type/HiveFunctionHelper.java:
##########
@@ -322,18 +324,24 @@ public RexNode getExpression(String functionText,
FunctionInfo fi,
// unix_timestamp(args) -> to_unix_timestamp(args)
calciteOp = HiveToUnixTimestampSqlOperator.INSTANCE;
}
- expr = rexBuilder.makeCall(returnType, calciteOp, inputs);
+ expr = getExpression(returnType, calciteOp, inputs);
}
if (expr instanceof RexCall && !expr.isA(SqlKind.CAST)) {
RexCall call = (RexCall) expr;
expr = rexBuilder.makeCall(returnType, call.getOperator(),
RexUtil.flatten(call.getOperands(), call.getOperator()));
}
-
return expr;
}
+ private RexNode getExpression(RelDataType returnType, SqlOperator calciteOp,
List<RexNode> inputs) {
+ if (Objects.requireNonNull(calciteOp.getKind()) == SqlKind.IN) {
Review Comment:
I think non null check was added by mistake, and it should work without this
check. I will remove this.
##########
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/HiveFilterSortPredicates.java:
##########
@@ -198,6 +203,16 @@ public Double visitCall(RexCall call) {
return null;
}
+ if (call.getKind() == SqlKind.SEARCH) {
+ RexCall expandedCall = (RexCall) RexUtil.expandSearch(
+ new RexBuilder(new JavaTypeFactoryImpl(new HiveTypeSystemImpl())),
Review Comment:
I will do this.
##########
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/HivePointLookupOptimizerRule.java:
##########
@@ -179,7 +178,7 @@ protected HivePointLookupOptimizerRule(
this.minNumORClauses = minNumORClauses;
}
- public RexNode analyzeRexNode(RexBuilder rexBuilder, RexNode condition) {
+ public static RexNode analyzeRexNode(RexBuilder rexBuilder, RexNode
condition, int minNumORClauses) {
Review Comment:
Within `HivePointLookupOptimizerRule#analyzeRexNode` we try to merge IN
expressions and create NOT/BETWEEN if possible.
Right now with Calcite 1.33 there's no way to create these expressions as
both INs and BETWEENs are replaced with SEARCH.
In this whole PR, in a few places we are trying to convert SEARCH back to IN
and BETWEEN. Anytime `sarg.isPoints()` returns false, we can use
`analyzeRexNode` to convert back to BETWEEN or NOT BETWEEN. For this I had to
make it static. Here's a snippet from `ASTConverter` for example:
```
case SEARCH:
ASTNode astNode = call.getOperands().get(0).accept(this);
astNodeLst.add(astNode);
RexLiteral literal = (RexLiteral) call.operands.get(1);
Sarg<?> sarg =
Objects.requireNonNull(literal.getValueAs(Sarg.class), "Sarg");
int minOrClauses =
SessionState.getSessionConf().getIntVar(HiveConf.ConfVars.HIVE_POINT_LOOKUP_OPTIMIZER_MIN);
// convert Sarg to IN when they are points.
if (sarg.isPoints()) {
// just expand SEARCH to ORs when point count is less than
HIVE_POINT_LOOKUP_OPTIMIZER_MIN
if (sarg.pointCount < minOrClauses) {
return visitCall((RexCall)
call.accept(RexUtil.searchShuttle(rexBuilder, null, -1)));
}
// else convert to IN
for (Range<?> range : sarg.rangeSet.asRanges()) {
astNodeLst.add(visitLiteral((RexLiteral) rexBuilder.makeLiteral(
range.lowerEndpoint(), literal.getType(), true, true)));
}
ASTNode inAST = SqlFunctionConverter.buildAST(HiveIn.INSTANCE,
astNodeLst, call.getType());
if (sarg.nullAs == RexUnknownAs.UNKNOWN) {
return inAST;
} else if (sarg.nullAs == RexUnknownAs.TRUE) {
ASTNode isNull =
visitCall((RexCall)
rexBuilder.makeCall(SqlStdOperatorTable.IS_NULL, call.getOperands().get(0)));
return SqlFunctionConverter.buildAST(SqlStdOperatorTable.OR,
Arrays.asList(isNull, inAST), call.getType());
} else {
ASTNode isNotNull =
visitCall((RexCall)
rexBuilder.makeCall(SqlStdOperatorTable.IS_NOT_NULL,
call.getOperands().get(0)));
return SqlFunctionConverter
.buildAST(SqlStdOperatorTable.AND, Arrays.asList(isNotNull,
inAST), call.getType());
}
// Expand SEARCH operator
} else {
return visitCall((RexCall) HivePointLookupOptimizerRule
.analyzeRexNode(
rexBuilder,
call.accept(RexUtil.searchShuttle(rexBuilder, null, -1)),
minOrClauses
)
);
}
```
##########
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/HiveCalciteUtil.java:
##########
@@ -656,7 +658,9 @@ public static ImmutableList<RexNode>
getPredsNotPushedAlready(Set<String> predic
}
// Build map to not convert multiple times, further remove already
included predicates
Map<String,RexNode> stringToRexNode = Maps.newLinkedHashMap();
+ RexSimplify simplify = new RexSimplify(inp.getCluster().getRexBuilder(),
RelOptPredicateList.EMPTY, RexUtil.EXECUTOR);
for (RexNode r : predsToPushDown) {
+ r = simplify.simplify(r);
Review Comment:
Without this we get into StackOverflow:
https://github.com/apache/hive/pull/5196/commits/7f97e5aea3fd3370350a29606853c1c381792a4c
I checked again and we still get into the issue without this. Maybe we need
to think of an alternate solution given that I had to exclude
`HivePreFilteringRule` from a test because of a stack overflow too.
##########
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/jdbc/HiveJdbcImplementor.java:
##########
@@ -128,6 +129,11 @@ public HiveJdbcImplementor(SqlDialect dialect,
JavaTypeFactory typeFactory) {
return result(join, leftResult, rightResult);
}
+public Result visit(JdbcTableScan scan) {
+ return result(scan.jdbcTable.tableName(),
+ ImmutableList.of(Clause.FROM), scan, null);
+}
+
Review Comment:
This is required because `visit(JdbcTableScan scan)` was removed from
Calcite in https://issues.apache.org/jira/browse/CALCITE-4640,
https://github.com/apache/calcite/pull/2426/files#diff-f118416cd59a4ba4e96ffcfa0d2b496dd2b372c6f5be01f7bb4d46996b9175d1
We get a lot of errors without this.
##########
ql/src/test/queries/clientpositive/cardinality_preserving_join_opt2.q:
##########
@@ -2,6 +2,7 @@ set hive.support.concurrency=true;
set hive.txn.manager=org.apache.hadoop.hive.ql.lockmgr.DbTxnManager;
set hive.strict.checks.cartesian.product=false;
set hive.stats.fetch.column.stats=true;
+set hive.cbo.rule.exclusion.regex=HivePreFilteringRule;
Review Comment:
No, this should definitely be not excluded in production. Unfortunately,
without this exclusion, this test would run for a long time and throw a
StackOverflow.
I excluded it just so that we get past this error and get a green run. If
possible, please look into this test failure, as I wasn't able to resolve this:
http://ci.hive.apache.org/job/hive-precommit/job/PR-5196/27/testReport/junit/org.apache.hadoop.hive.cli.split3/TestMiniLlapLocalCliDriver/Testing___split_22___PostProcess___testCliDriver_cardinality_preserving_join_opt2_/
##########
ql/src/test/org/apache/hadoop/hive/ql/optimizer/calcite/stats/TestFilterSelectivityEstimator.java:
##########
@@ -508,8 +492,19 @@ public void
testComputeRangePredicateSelectivityBetweenWithNULLS() {
public void testComputeRangePredicateSelectivityNotBetweenWithNULLS() {
doReturn((double) 20).when(tableMock).getRowCount();
doReturn(Collections.singletonList(stats)).when(tableMock).getColStat(Collections.singletonList(0));
- RexNode filter = REX_BUILDER.makeCall(SqlStdOperatorTable.BETWEEN,
boolTrue, inputRef0, int1, int3);
+ RexNode filter = makeNotBetween(inputRef0, int1, int3);
FilterSelectivityEstimator estimator = new
FilterSelectivityEstimator(scan, mq);
Assert.assertEquals(0.55, estimator.estimateSelectivity(filter), DELTA);
}
+
+ private RexNode makeNotBetween(RexNode inputRef, RexNode left, RexNode
right) {
+ RexNode withOr = REX_BUILDER.makeCall(
+ SqlStdOperatorTable.OR,
+ REX_BUILDER.makeCall(SqlStdOperatorTable.LESS_THAN, inputRef, left),
+ REX_BUILDER.makeCall(SqlStdOperatorTable.GREATER_THAN, inputRef, right)
+ );
+ RexSimplify simplify = new RexSimplify(REX_BUILDER,
RelOptPredicateList.EMPTY, RexUtil.EXECUTOR);
+
+ return simplify.simplify(withOr);
Review Comment:
With what you have suggested, it'll create a REXCALL like `NOT(SEARCH...)`,
which goes to `computeNotEqualitySelectivity` in `FilterSelectivityEstimator`.
maxNDV is computed there but 1.0 is always returned when the value is less than
1. This gives wrong result, even if we add an else-if block in `getMaxNDV`:
```
else if (op.isA(SqlKind.SEARCH)) {
tmpNDV = op.accept(this);
if (tmpNDV == null) {
return null;
}
if (tmpNDV > maxNDV) {
maxNDV = tmpNDV;
}
} else {
irv = new InputReferencedVisitor();
irv.apply(op);
...
...
```
With my patch, it creates a REXCALL with SEARCH operator, without the NOT.
And it directly matches to `case SEARCH`.
Moreover, we cannot create a BETWEEN with `makeBetween` when `left > right`,
so this test will fail with what you've suggested:
```
public void
testComputeRangePredicateSelectivityNotBetweenRightLowerThanLeft() {
RexNode filter = makeNotBetween(inputRef0, int5, int3);
FilterSelectivityEstimator estimator = new
FilterSelectivityEstimator(scan, mq);
Assert.assertEquals(1, estimator.estimateSelectivity(filter), DELTA);
}
```
Let me know what you think about this.
##########
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/stats/FilterSelectivityEstimator.java:
##########
@@ -171,7 +176,36 @@ public Double visitCall(RexCall call) {
break;
}
- default:
+ case SEARCH:
+ RexLiteral literal = (RexLiteral) call.operands.get(1);
+ Sarg<?> sarg = Objects.requireNonNull(literal.getValueAs(Sarg.class),
"Sarg");
+ RexBuilder rexBuilder = new RexBuilder(new JavaTypeFactoryImpl(new
HiveTypeSystemImpl()));
Review Comment:
I will change this.
##########
ql/src/test/org/apache/hadoop/hive/ql/io/TestSymlinkTextInputFormat.java:
##########
@@ -157,7 +157,7 @@ public void testCombine() throws Exception {
drv.run(loadFileCommand);
- String cmd = "select key*1 from " + tblName;
+ String cmd = "select key*2 from " + tblName;
Review Comment:
I saw that the final logical plan with calcite 1.33 is a bit more reduced
than what was produced in 1.25
```
1.33 - select key*1 ...
DEBUG [main] translator.PlanModifierForASTConv: Final plan after modifier
HiveProject(_c0=[$0])
HiveTableScan(table=[[default, text_symlink_text]],
table:alias=[text_symlink_text])
1.25 - select key*1 ...
DEBUG [main] translator.PlanModifierForASTConv: Final plan after modifier
HiveProject(_c0=[*($0, 1)])
HiveTableScan(table=[[default, text_symlink_text]],
table:alias=[text_symlink_text])
```
I think `key * 1` is getting reduced to just `key` in 1.33. If we change it
to `key*2` then the test passes:
```
1.33 - select key*2 ...
DEBUG [main] translator.PlanModifierForASTConv: Final plan after modifier
HiveProject(_c0=[*($0, 2)])
HiveTableScan(table=[[default, text_symlink_text]],
table:alias=[text_symlink_text])
```
Since this test is testing symlink text input format, and is not
particularly testing `key * 1`, I changed it to `key * 2`.
Moreover, in 1.25, when we run the same test with `select key ...`, it fails
with the same error.
##########
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/reloperators/HiveFilter.java:
##########
@@ -72,6 +78,22 @@ public HiveFilter(RelOptCluster cluster, RelTraitSet traits,
RelNode child, RexN
super(cluster, TraitsUtil.getDefaultTraitSet(cluster), child, condition);
this.correlationInfos = new CorrelationInfoSupplier(getCondition());
}
+
+ @Override
+ public RelWriter explainTerms(RelWriter pw) {
+ // Remove this method after upgrading Calcite to 1.35+
Review Comment:
Is it a good idea to write project properties with `properties-maven-plugin`
to `ql/src/main/resources/`, and read the calcite version from there and
compare? This plugin is already in use in `itests`.
If we just define a constant CALCITE_VERSION = 1.35, it won't throw an
exception when the version is higher than the constant. But if we read directly
from the properties file, it'll throw an exception.
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