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Fixed aggregate issue and added unsupported exception for WHERE in JOIN #125

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Dec 16, 2021
Merged

Fixed aggregate issue and added unsupported exception for WHERE in JOIN #125

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481b9ae
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lyndonbauto Dec 16, 2021
acf8289
fixed aggregate failing tests
xiazcy Dec 16, 2021
ae34d5b
[1] Added throw for WHERE in JOIN
lyndonbauto Dec 16, 2021
3339451
Apply suggestions from code review
lyndonbauto Dec 16, 2021
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lyndonbauto Dec 16, 2021
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7 changes: 6 additions & 1 deletion sql-gremlin/README.asciidoc
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Expand Up @@ -45,6 +45,9 @@ Identifier matching is case-sensitive and identifiers that match a reserved SQL
=== Joins
Currently, the driver only support `INNER JOIN` on two vertices that are connected by an edge. When looking at vertices you will see `<edge_label>_IN_ID` or `<edge_label>_OUT_ID`.

`WHERE` and `HAVING` are not currently supported in conjunction with a `JOIN` clause.
Foreign keys are not generated and not exposed in JDBC metadata at this time.

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Vertices can be joined on columns that have the same edge label and one ends with `IN_ID` while the other ends with an `OUT_ID`.

=== Data Types
Expand All @@ -66,11 +69,13 @@ Supported operators are listed below. Arithmetic, string, conditional and date o

==== Comparison Operators
* `value1 <op> value2` where `op` is one of : `=`, `<>`, `<`, `>`, `<=` or `>=`
* `NOT` in conjunction with a comparison operator is not currently supported

==== Logical Operators
* `boolean1` OR `boolean2`
* `boolean1` AND `boolean2`
* NOT `boolean2`
* NOT `boolean2` is supported only when used with a boolean valued column in `WHERE`/`HAVING` filters
* NOT `boolean2` is supported with expressions and boolean values in `SELECT` clause
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==== Aggregate Functions
* `AVG(numeric)`
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11 changes: 8 additions & 3 deletions sql-gremlin/src/main/java/org/twilmes/sql/gremlin/adapter/converter/SqlMetadata.java
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Expand Up @@ -33,7 +33,6 @@
import org.twilmes.sql.gremlin.adapter.converter.schema.gremlin.GremlinTableBase;
import org.twilmes.sql.gremlin.adapter.converter.schema.gremlin.GremlinVertexTable;
import org.twilmes.sql.gremlin.adapter.util.SqlGremlinError;

import java.sql.SQLException;
import java.time.Instant;
import java.util.ArrayList;
Expand Down Expand Up @@ -218,8 +217,14 @@ public String getRenameFromActual(final String actual) {
}

public String getActualColumnName(final GremlinTableBase table, final String column) throws SQLException {
final String actualColumnName = getRenamedColumn(column);
return table.getColumn(actualColumnName).getName();
if (table.hasColumn(column)) {
return table.getColumn(column).getName();
} else if (columnRenameMap.containsKey(column)) {
return table.getColumn(getRenamedColumn(column)).getName();
}
final Optional<String> actualName = columnRenameMap.entrySet().stream().
filter(entry -> entry.getValue().equals(column)).map(Map.Entry::getKey).findFirst();
return table.getColumn(actualName.orElse(column)).getName();
}

public boolean getTableHasColumn(final GremlinTableBase table, final String column) {
Expand Down
23 changes: 16 additions & 7 deletions sql-gremlin/src/main/java/org/twilmes/sql/gremlin/adapter/converter/SqlTraversalEngine.java
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Expand Up @@ -29,7 +29,6 @@
import org.twilmes.sql.gremlin.adapter.converter.schema.gremlin.GremlinTableBase;
import org.twilmes.sql.gremlin.adapter.results.SqlGremlinQueryResult;
import org.twilmes.sql.gremlin.adapter.util.SqlGremlinError;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
Expand Down Expand Up @@ -100,9 +99,16 @@ public static void addProjection(final List<GremlinSqlIdentifier> gremlinSqlIden
}


public static void applyTraversal(final GraphTraversal<?, ?> graphTraversal,
final GraphTraversal<?, ?> subGraphTraversal) {
graphTraversal.by(subGraphTraversal);
public static void applyTraversal(final boolean apply,
final GraphTraversal graphTraversal,
final GraphTraversal subGraphTraversal) {
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graphTraversal.by((apply ? __.coalesce(subGraphTraversal, __.constant(SqlGremlinQueryResult.NULL_VALUE)) : subGraphTraversal));
}


public static void applyTraversal(final GraphTraversal graphTraversal,
final GraphTraversal subGraphTraversal) {
applyTraversal(false, graphTraversal, subGraphTraversal);
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}

public static void applySqlIdentifier(final GremlinSqlIdentifier sqlIdentifier,
Expand All @@ -115,7 +121,8 @@ public static void applySqlIdentifier(final GremlinSqlIdentifier sqlIdentifier,
graphTraversal.constant(1);
} else if (sqlIdentifier.getNameCount() == 2) {
// With size 2 format of identifier is 'table'.'column' => ['table', 'column']
appendGraphTraversal(sqlIdentifier.getName(0), sqlMetadata.getRenamedColumn(sqlIdentifier.getName(1)), sqlMetadata, graphTraversal);
appendGraphTraversal(sqlIdentifier.getName(0), sqlMetadata.getRenamedColumn(sqlIdentifier.getName(1)),
sqlMetadata, graphTraversal);
} else {
// With size 1, format of identifier is 'column'.
appendGraphTraversal(sqlMetadata.getRenamedColumn(sqlIdentifier.getName(0)), sqlMetadata, graphTraversal);
Expand All @@ -128,7 +135,8 @@ public static void applySqlIdentifier(final GremlinSqlIdentifier sqlIdentifier,
return __.project(firstColumn, remaining);
}

private static void appendColumnSelect(final SqlMetadata sqlMetadata, final String column, final GraphTraversal<?, ?> graphTraversal) {
private static void appendColumnSelect(final SqlMetadata sqlMetadata, final String column,
final GraphTraversal<?, ?> graphTraversal) {
if (sqlMetadata.isDoneFilters()) {
graphTraversal.choose(__.has(column), __.values(column), __.constant(SqlGremlinQueryResult.NULL_VALUE));
} else {
Expand All @@ -151,7 +159,8 @@ private static void appendGraphTraversal(final String table, final String column
}
} else {
// It's this vertex/edge.
if (columnName.toLowerCase(Locale.getDefault()).startsWith(gremlinTableBase.getLabel().toLowerCase(Locale.getDefault()))) {
if (columnName.toLowerCase(Locale.getDefault())
.startsWith(gremlinTableBase.getLabel().toLowerCase(Locale.getDefault()))) {
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graphTraversal.id();
} else {
if (columnName.endsWith(IN_ID)) {
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10 changes: 6 additions & 4 deletions ...lmes/sql/gremlin/adapter/converter/ast/nodes/operator/logic/GremlinSqlBinaryOperator.java
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Expand Up @@ -187,18 +187,20 @@ void handleEmbeddedGremlinSqlBasicCall(final GremlinSqlBasicCall gremlinSqlBasic
if (operands.size() != 2) {
throw SqlGremlinError.create(SqlGremlinError.BINARY_AND_PREFIX_OPERAND_COUNT);
}
final GraphTraversal<?, ?>[] graphTraversals = new GraphTraversal[2];
final GraphTraversal[] graphTraversals = new GraphTraversal[2];
for (int i = 0; i < operands.size(); i++) {
graphTraversals[i] = __.unfold();
if (operands.get(i) instanceof GremlinSqlIdentifier) {
GremlinSqlIdentifier gremlinSqlIdentifier = (GremlinSqlIdentifier) operands.get(i);
GraphTraversal subtraversal = __.unfold();
final GremlinSqlIdentifier gremlinSqlIdentifier = (GremlinSqlIdentifier) operands.get(i);
final GraphTraversal subtraversal = __.unfold();
SqlTraversalEngine.applySqlIdentifier(gremlinSqlIdentifier, sqlMetadata, subtraversal);
graphTraversals[i] = __.coalesce(subtraversal,
__.constant(sqlMetadata.getDefaultCoalesceValue(gremlinSqlIdentifier.getColumn())));
} else if (operands.get(i) instanceof GremlinSqlBasicCall) {
GremlinSqlBasicCall gremlinSqlBasicCall = ((GremlinSqlBasicCall) operands.get(i));
final GremlinSqlBasicCall gremlinSqlBasicCall = ((GremlinSqlBasicCall) operands.get(i));
gremlinSqlBasicCall.generateTraversal(graphTraversals[i]);
graphTraversals[i] = __.coalesce(graphTraversals[i],
__.constant(sqlMetadata.getDefaultCoalesceValue(gremlinSqlBasicCall.getActual())));
} else if (operands.get(i) instanceof GremlinSqlLiteral) {
((GremlinSqlLiteral) operands.get(i)).appendTraversal(graphTraversals[i]);
}
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4 changes: 2 additions & 2 deletions ...ain/java/org/twilmes/sql/gremlin/adapter/converter/ast/nodes/select/GremlinSqlSelect.java
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Expand Up @@ -130,12 +130,12 @@ protected void applyColumnRetrieval(final GraphTraversal<?, ?> graphTraversal, f
SqlTraversalEngine.getEmptyTraversal(stepDirection, sqlMetadata);
SqlTraversalEngine
.applySqlIdentifier((GremlinSqlIdentifier) gremlinSqlNode, sqlMetadata, subSubGraphTraversal);
SqlTraversalEngine.applyTraversal(subGraphTraversal, subSubGraphTraversal);
SqlTraversalEngine.applyTraversal(true, subGraphTraversal, subSubGraphTraversal);
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} else if (gremlinSqlNode instanceof GremlinSqlBasicCall) {
final GraphTraversal<?, ?> subSubGraphTraversal =
SqlTraversalEngine.getEmptyTraversal(stepDirection, sqlMetadata);
((GremlinSqlBasicCall) gremlinSqlNode).generateTraversal(subSubGraphTraversal);
SqlTraversalEngine.applyTraversal(subGraphTraversal, subSubGraphTraversal);
SqlTraversalEngine.applyTraversal(true, subGraphTraversal, subSubGraphTraversal);
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} else {
throw SqlGremlinError.create(SqlGremlinError.UNKNOWN_NODE_SELECTLIST, gremlinSqlNode.getClass().getName());
}
Expand Down
8 changes: 8 additions & 0 deletions ...ava/org/twilmes/sql/gremlin/adapter/converter/ast/nodes/select/GremlinSqlSelectMulti.java
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Expand Up @@ -209,6 +209,7 @@ protected void runTraversalExecutor(final GraphTraversal<?, ?> graphTraversal,
graphTraversal = g.E().hasLabel(edgeLabel)
.where(__.inV().hasLabel(inVLabel))
.where(__.outV().hasLabel(outVLabel));
applyWhere(graphTraversal);
applyGroupBy(graphTraversal, edgeLabel, inVRename, outVRename);
applySelectValues(graphTraversal);
applyOrderBy(graphTraversal, edgeLabel, inVRename, outVRename);
Expand Down Expand Up @@ -311,4 +312,11 @@ protected void applyHaving(final GraphTraversal<?, ?> graphTraversal) throws SQL
}
throw SqlGremlinError.createNotSupported(SqlGremlinError.JOIN_HAVING_UNSUPPORTED);
}

protected void applyWhere(final GraphTraversal<?, ?> graphTraversal) throws SQLException {
if (sqlSelect.getWhere() == null) {
return;
}
throw SqlGremlinError.createNotSupported(SqlGremlinError.JOIN_WHERE_UNSUPPORTED);
}
}
1 change: 1 addition & 0 deletions sql-gremlin/src/main/java/org/twilmes/sql/gremlin/adapter/util/SqlGremlinError.java
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Expand Up @@ -73,6 +73,7 @@ public enum SqlGremlinError {
CANNOT_GROUP_TABLE,
CANNOT_GROUP_COLUMN,
JOIN_HAVING_UNSUPPORTED,
JOIN_WHERE_UNSUPPORTED,
SINGLE_SELECT_MULTI_RETURN,
SELECT_NO_LIST,
UNEXPECTED_FROM_FORMAT,
Expand Down
1 change: 1 addition & 0 deletions sql-gremlin/src/main/resources/error-messages_en.properties
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Expand Up @@ -59,6 +59,7 @@ CANNOT_GROUP_EDGES=Error: Cannot group by edges.
CANNOT_GROUP_TABLE=Error: Unable to group table %s.
CANNOT_GROUP_COLUMN=Error: Unable to group column %s.
JOIN_HAVING_UNSUPPORTED=Unsupported: HAVING is not currently supported for JOIN.
JOIN_WHERE_UNSUPPORTED=Unsupported: WHERE is not currently supported for JOIN.
SINGLE_SELECT_MULTI_RETURN=Error: Single select has multi-table return.
SELECT_NO_LIST=Error: GremlinSqlSelect expects select list component.
UNEXPECTED_FROM_FORMAT=Unexpected format for FROM.
Expand Down
8 changes: 7 additions & 1 deletion sql-gremlin/src/test/java/org/twilmes/sql/gremlin/adapter/GremlinSqlAdvancedSelectTest.java
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Expand Up @@ -147,7 +147,7 @@ public void testWhere() throws SQLException {
rows(r("Tom", 35), r("Juanita", 50)));
}

// TODO: Support NOT on operators
// TODO #127: Support NOT in WHERE filter.
@Test
@Disabled
public void testWhereNot() throws SQLException {
Expand Down Expand Up @@ -385,6 +385,9 @@ void testMultiComparisonOperator() throws SQLException {
runQueryTestResults(
"SELECT NOT age > 0 FROM person",
columns("NOT age > 0"), rows(r(false), r(false), r(false), r(false), r(false), r(false)));
runQueryTestResults(
"SELECT NOT name = 'Tom' FROM person",
columns("NOT name = Tom"), rows(r(false), r(true), r(true), r(true), r(true), r(true)));
}

@Test
Expand All @@ -410,5 +413,8 @@ void testComparisonWithAsOperator() throws SQLException {
runQueryTestResults(
"SELECT NOT age > 0 AS a FROM person",
columns("a"), rows(r(false), r(false), r(false), r(false), r(false), r(false)));
runQueryTestResults(
"SELECT NOT name = 'Tom' AS a FROM person",
columns("a"), rows(r(false), r(true), r(true), r(true), r(true), r(true)));
}
}
4 changes: 2 additions & 2 deletions sql-gremlin/src/test/java/org/twilmes/sql/gremlin/adapter/GremlinSqlBaseTest.java
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Expand Up @@ -123,13 +123,13 @@ protected void runJoinQueryTestResults(final String query, final List<String> co

protected void runQueryTestThrows(final String query, final SqlGremlinError messageKey,
final Object... formatArgs) {
Throwable t = Assertions.assertThrows(SQLException.class, () -> converter.executeQuery(g, query));
final Throwable t = Assertions.assertThrows(SQLException.class, () -> converter.executeQuery(g, query));
Assert.assertEquals(SqlGremlinError.getMessage(messageKey, formatArgs), t.getMessage());
}

protected void runNotSupportedQueryTestThrows(final String query, final SqlGremlinError messageKey,
final Object... formatArgs) {
Throwable t = Assertions.assertThrows(SQLNotSupportedException.class, () -> converter.executeQuery(g, query));
final Throwable t = Assertions.assertThrows(SQLNotSupportedException.class, () -> converter.executeQuery(g, query));
Assert.assertEquals(SqlGremlinError.getMessage(messageKey, formatArgs), t.getMessage());
}

Expand Down
53 changes: 27 additions & 26 deletions ...gremlin/src/test/java/org/twilmes/sql/gremlin/adapter/GremlinSqlIncompleteSelectTest.java
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Expand Up @@ -19,11 +19,7 @@

package org.twilmes.sql.gremlin.adapter;

import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
import org.twilmes.sql.gremlin.adapter.util.SqlGremlinError;

import java.math.BigDecimal;
import java.sql.SQLException;

public class GremlinSqlIncompleteSelectTest extends GremlinSqlBaseTest {
Expand All @@ -44,7 +40,8 @@ public void testProject() throws SQLException {

@Test
public void testEdges() throws SQLException {
runQueryTestResults("select * from worksFor where yearsWorked = 9", columns("person_OUT_ID", "company_IN_ID", "yearsWorked", "worksFor_ID"),
runQueryTestResults("select * from worksFor where yearsWorked = 9",
columns("person_OUT_ID", "company_IN_ID", "yearsWorked", "worksFor_ID"),
rows(r(25L, 2L, 9, 61L)));
}

Expand All @@ -66,7 +63,7 @@ public void testOrderWithNull() throws SQLException {
runQueryTestResults("SELECT name, age AS a FROM person ORDER BY a", columns("name", "a"),
rows(r("Patty", 29), r(null, 30), r("Phil", 31), r("Susan", 45), r("Juanita", 50), r("Tom", null)));
runQueryTestResults("SELECT name, age AS a FROM person ORDER BY a DESC", columns("name", "a"),
rows( r("Tom", null), r("Juanita", 50), r("Susan", 45), r("Phil", 31), r(null, 30), r("Patty", 29)));
rows(r("Tom", null), r("Juanita", 50), r("Susan", 45), r("Phil", 31), r(null, 30), r("Patty", 29)));

// ORDER with string column.
runQueryTestResults("SELECT name, age FROM person ORDER BY name", columns("name", "age"),
Expand All @@ -90,66 +87,70 @@ public void testWhereNull() throws SQLException {

// TODO: Support aggregates for null values
@Test
@Disabled
public void testHavingNull() throws SQLException {
// HAVING with aggregate literal.
runQueryTestResults("SELECT MIN(age) AS age FROM person GROUP BY name HAVING MIN(age) > 1",
columns("age"),
rows(r((Object) null), r(29), r(31), r(45), r(50), r(30)));
runQueryTestResults("SELECT wentToSpace, SUM(age) FROM person GROUP BY wentToSpace HAVING SUM(age) > 1000",
columns("wentToSpace", "SUM(age)"),
rows());
columns("wentToSpace", "SUM(age)"),
rows());
runQueryTestResults("SELECT wentToSpace, COUNT(age) FROM person GROUP BY wentToSpace HAVING COUNT(age) < 1000",
columns("wentToSpace", "COUNT(age)"),
rows(r(false, 3L), r(true, 3L)));
runQueryTestResults("SELECT wentToSpace, COUNT(age) FROM person GROUP BY wentToSpace HAVING COUNT(age) <> 3",
rows(r(false, 2L), r(true, 2L), r(null, 1L)));
runQueryTestResults("SELECT wentToSpace, COUNT(age) FROM person GROUP BY wentToSpace HAVING COUNT(age) <> 2",
columns("wentToSpace", "COUNT(age)"),
rows());
rows(r(null, 1L)));
runQueryTestResults("SELECT COUNT(age), SUM(age) FROM person GROUP BY wentToSpace HAVING SUM(age) > 100",
columns("COUNT(age)", "SUM(age)"),
rows(r(3L, 125L)));
rows());
runQueryTestResults("SELECT COUNT(age), SUM(age) FROM person GROUP BY wentToSpace HAVING SUM(age) > 80",
columns("COUNT(age)", "SUM(age)"),
rows(r(2L, 95L)));
runQueryTestResults("SELECT COUNT(age), SUM(age) FROM person GROUP BY wentToSpace HAVING SUM(age) < 100",
columns("COUNT(age)", "SUM(age)"),
rows(r(3L, 95L)));
rows(r(2L, 60L), r(2L, 95L), r(1L, 30L)));
runQueryTestResults("SELECT COUNT(age), SUM(age) FROM person GROUP BY age HAVING SUM(age) <> 1000",
columns("COUNT(age)", "SUM(age)"),
rows(r(1L, 35L), r(1L, 29L), r(1L, 31L), r(1L, 45L), r(1L, 50L), r(1L, 30L)));
runQueryTestResults("SELECT COUNT(age), SUM(age) FROM person GROUP BY age HAVING SUM(age) = 35",
rows(r(0L, null), r(1L, 29L), r(1L, 31L), r(1L, 45L), r(1L, 50L), r(1L, 30L)));
runQueryTestResults("SELECT COUNT(age), SUM(age) FROM person GROUP BY age HAVING SUM(age) = 29",
columns("COUNT(age)", "SUM(age)"),
rows(r(1L, 35L)));
rows(r(1L, 29L)));

// Having with AND.
runQueryTestResults(
"SELECT COUNT(age), SUM(age) FROM person GROUP BY wentToSpace HAVING SUM(age) <> 1000 AND COUNT(age) = 3",
columns("COUNT(age)", "SUM(age)"),
rows(r(3L, 95L), r(3L, 125L)));
rows());
runQueryTestResults(
"SELECT COUNT(age), SUM(age) FROM person GROUP BY wentToSpace HAVING SUM(age) = 125 AND COUNT(age) = 3",
columns("COUNT(age)", "SUM(age)"),
rows(r(3L, 125L)));
rows());
runQueryTestResults(
"SELECT COUNT(age), SUM(age) FROM person GROUP BY wentToSpace HAVING SUM(age) <> 125 AND COUNT(age) = 3",
columns("COUNT(age)", "SUM(age)"),
rows(r(3L, 95L)));
rows());
runQueryTestResults(
"SELECT COUNT(age), SUM(age) FROM person GROUP BY wentToSpace HAVING SUM(age) <> 125 AND COUNT(age) <> 3",
columns("COUNT(age)", "SUM(age)"),
rows());
rows(r(2L, 60L), r(2L, 95L), r(1L, 30L)));

// Having with OR.
runQueryTestResults(
"SELECT COUNT(age), SUM(age) FROM person GROUP BY wentToSpace HAVING SUM(age) = 1000 OR COUNT(age) = 3",
columns("COUNT(age)", "SUM(age)"),
rows(r(3L, 95L), r(3L, 125L)));
rows());
runQueryTestResults(
"SELECT COUNT(age), SUM(age) FROM person GROUP BY wentToSpace HAVING SUM(age) = 1000 OR COUNT(age) <> 3",
columns("COUNT(age)", "SUM(age)"),
rows());
rows(r(2L, 60L), r(2L, 95L), r(1L, 30L)));
runQueryTestResults(
"SELECT COUNT(age), SUM(age) FROM person GROUP BY wentToSpace HAVING SUM(age) = 125 OR COUNT(age) <> 3",
columns("COUNT(age)", "SUM(age)"),
rows(r(3L, 125L)));
rows(r(2L, 60L), r(2L, 95L), r(1L, 30L)));
runQueryTestResults(
"SELECT COUNT(age), SUM(age) FROM person GROUP BY wentToSpace HAVING SUM(age) <> 125 OR COUNT(age) <> 3",
columns("COUNT(age)", "SUM(age)"),
rows(r(3L, 95L)));
rows(r(2L, 60L), r(2L, 95L), r(1L, 30L)));
}

@Test
Expand Down
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