Skip to content

Allow changing field type in records wrapped in a map #24248

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Nov 27, 2024
Merged

Allow changing field type in records wrapped in a map #24248

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
10 changes: 10 additions & 0 deletions core/trino-main/src/main/java/io/trino/execution/SetColumnTypeTask.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@
import io.trino.spi.connector.ColumnHandle;
import io.trino.spi.connector.ColumnMetadata;
import io.trino.spi.type.ArrayType;
import io.trino.spi.type.MapType;
import io.trino.spi.type.RowType;
import io.trino.spi.type.Type;
import io.trino.spi.type.TypeManager;
Expand Down Expand Up @@ -153,6 +154,15 @@ private static List<RowType.Field> getCandidates(Type type, String fieldName)
// return nameless Field to denote unwrapping of container
return ImmutableList.of(RowType.field(arrayType.getElementType()));
}
if (type instanceof MapType mapType) {
if (fieldName.equals("key")) {
return ImmutableList.of(RowType.field(mapType.getKeyType()));
}
if (fieldName.equals("value")) {
return ImmutableList.of(RowType.field(mapType.getValueType()));
}
throw new TrinoException(NOT_SUPPORTED, "MAP type should be denoted by 'key' or 'value' in the path; found '%s'".formatted(fieldName));
}
if (!(type instanceof RowType rowType)) {
throw new TrinoException(NOT_SUPPORTED, "Unsupported type: " + type);
}
Expand Down
18 changes: 18 additions & 0 deletions plugin/trino-iceberg/src/test/java/io/trino/plugin/iceberg/BaseIcebergConnectorTest.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -8567,6 +8567,24 @@ public void testCreateTableWithDataLocationButObjectStoreDisabled()
"Data location can only be set when object store is enabled");
}

@Test
@Override
public void testSetFieldMapKeyType()
{
// Iceberg doesn't support change a map 'key' column. Only map values can be changed.
assertThatThrownBy(super::testSetFieldMapKeyType)
.hasMessageContaining("Failed to set field type: Cannot alter map keys");
}

@Test
@Override
public void testSetNestedFieldMapKeyType()
{
// Iceberg doesn't support change a map 'key' column. Only map values can be changed.
assertThatThrownBy(super::testSetNestedFieldMapKeyType)
.hasMessageContaining("Failed to set field type: Cannot alter map keys");
}

@Override
protected Optional<SetColumnTypeSetup> filterSetColumnTypesDataProvider(SetColumnTypeSetup setup)
{
Expand Down
87 changes: 87 additions & 0 deletions testing/trino-testing/src/main/java/io/trino/testing/BaseConnectorTest.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -151,6 +151,7 @@
import static io.trino.testing.TestingConnectorBehavior.SUPPORTS_SET_COLUMN_TYPE;
import static io.trino.testing.TestingConnectorBehavior.SUPPORTS_SET_FIELD_TYPE;
import static io.trino.testing.TestingConnectorBehavior.SUPPORTS_SET_FIELD_TYPE_IN_ARRAY;
import static io.trino.testing.TestingConnectorBehavior.SUPPORTS_SET_FIELD_TYPE_IN_MAP;
import static io.trino.testing.TestingConnectorBehavior.SUPPORTS_TOPN_PUSHDOWN;
import static io.trino.testing.TestingConnectorBehavior.SUPPORTS_TRUNCATE;
import static io.trino.testing.TestingConnectorBehavior.SUPPORTS_UPDATE;
Expand Down Expand Up @@ -3295,6 +3296,92 @@ public void testSetFieldTypeInNestedArray()
}
}

@Test
public void testSetFieldMapKeyType()
{
skipTestUnless(hasBehavior(SUPPORTS_CREATE_TABLE_WITH_DATA) && hasBehavior(SUPPORTS_ROW_TYPE));

String tableDefinition = "AS SELECT CAST(map(array[row(1)], array[2]) AS map(row(field integer), integer)) AS col";
if (!hasBehavior(SUPPORTS_SET_FIELD_TYPE_IN_MAP)) {
try (TestTable table = new TestTable(getQueryRunner()::execute, "test_set_field_type_in_map", tableDefinition)) {
assertQueryFails("ALTER TABLE " + table.getName() + " ALTER COLUMN col.key.field SET DATA TYPE bigint", ".*does not support.*");
}
return;
}

try (TestTable table = new TestTable(getQueryRunner()::execute, "test_set_field_type_in_map", tableDefinition)) {
assertThat(getColumnType(table.getName(), "col")).isEqualTo("map(row(field integer), integer)");

assertUpdate("ALTER TABLE " + table.getName() + " ALTER COLUMN col.key.field SET DATA TYPE bigint");

assertThat(getColumnType(table.getName(), "col")).isEqualTo("map(row(field bigint), integer)");
assertThat(query("SELECT * FROM " + table.getName()))
.matches("SELECT CAST(map(array[row(1)], array[2]) AS map(row(field bigint), integer))");
}
}

@Test
public void testSetFieldMapValueType()
{
skipTestUnless(hasBehavior(SUPPORTS_CREATE_TABLE_WITH_DATA) && hasBehavior(SUPPORTS_ROW_TYPE));

String tableDefinition = "AS SELECT CAST(map(array[1], array[row(2)]) AS map(integer, row(field integer))) AS col";
if (!hasBehavior(SUPPORTS_SET_FIELD_TYPE_IN_MAP)) {
try (TestTable table = new TestTable(getQueryRunner()::execute, "test_set_field_type_in_map", tableDefinition)) {
assertQueryFails("ALTER TABLE " + table.getName() + " ALTER COLUMN col.value.field SET DATA TYPE bigint", ".*does not support.*");
}
return;
}

try (TestTable table = new TestTable(getQueryRunner()::execute, "test_set_field_type_in_map", tableDefinition)) {
assertThat(getColumnType(table.getName(), "col")).isEqualTo("map(integer, row(field integer))");

assertUpdate("ALTER TABLE " + table.getName() + " ALTER COLUMN col.value.field SET DATA TYPE bigint");
Copy link
Contributor

@findinpath findinpath Nov 25, 2024

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Potential follow-up:
Please consider documenting how to update the type of map key/value types on https://trino.io/docs/current/sql/alter-table.html

cc @mosabua

Copy link
Member Author

@ebyhr ebyhr Nov 26, 2024

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

#18546 is the relevant issue.

Copy link
Member

@mosabua mosabua Nov 27, 2024

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@jhlodin @Ordinant .. can you look at this .. I wont be able to get to this


assertThat(getColumnType(table.getName(), "col")).isEqualTo("map(integer, row(field bigint))");
assertThat(query("SELECT * FROM " + table.getName()))
.matches("SELECT CAST(map(array[1], array[row(2)]) AS map(integer, row(field bigint)))");
}
}

@Test
public void testSetNestedFieldMapKeyType()
{
skipTestUnless(hasBehavior(SUPPORTS_SET_FIELD_TYPE_IN_ARRAY) && hasBehavior(SUPPORTS_SET_FIELD_TYPE_IN_MAP) && hasBehavior(SUPPORTS_CREATE_TABLE_WITH_DATA) && hasBehavior(SUPPORTS_ARRAY) && hasBehavior(SUPPORTS_ROW_TYPE));

try (TestTable table = new TestTable(
getQueryRunner()::execute,
"test_set_nested_field_type_in_map",
"AS SELECT CAST(array[map(array[row(1)], array[2])] AS array(map(row(field integer), integer))) AS col")) {
assertThat(getColumnType(table.getName(), "col")).isEqualTo("array(map(row(field integer), integer))");

assertUpdate("ALTER TABLE " + table.getName() + " ALTER COLUMN col.element.key.field SET DATA TYPE bigint");

assertThat(getColumnType(table.getName(), "col")).isEqualTo("array(map(row(field bigint), integer))");
assertThat(query("SELECT * FROM " + table.getName()))
.matches("SELECT CAST(array[map(array[row(1)], array[2])] AS array(map(row(field bigint), integer)))");
}
}

@Test
public void testSetNestedFieldMapValueType()
{
skipTestUnless(hasBehavior(SUPPORTS_SET_FIELD_TYPE_IN_ARRAY) && hasBehavior(SUPPORTS_SET_FIELD_TYPE_IN_MAP) && hasBehavior(SUPPORTS_CREATE_TABLE_WITH_DATA) && hasBehavior(SUPPORTS_ARRAY) && hasBehavior(SUPPORTS_ROW_TYPE));

try (TestTable table = new TestTable(
getQueryRunner()::execute,
"test_set_nested_field_type_in_map",
"AS SELECT CAST(array[map(array[1], array[row(2)])] AS array(map(integer, row(field integer)))) AS col")) {
assertThat(getColumnType(table.getName(), "col")).isEqualTo("array(map(integer, row(field integer)))");

assertUpdate("ALTER TABLE " + table.getName() + " ALTER COLUMN col.element.value.field SET DATA TYPE bigint");

assertThat(getColumnType(table.getName(), "col")).isEqualTo("array(map(integer, row(field bigint)))");
assertThat(query("SELECT * FROM " + table.getName()))
.matches("SELECT CAST(array[map(array[1], array[row(2)])] AS array(map(integer, row(field bigint))))");
}
}

protected void verifySetFieldTypeFailurePermissible(Throwable e)
{
throw new AssertionError("Unexpected set field type failure", e);
Expand Down
1 change: 1 addition & 0 deletions testing/trino-testing/src/main/java/io/trino/testing/TestingConnectorBehavior.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -94,6 +94,7 @@ public enum TestingConnectorBehavior
SUPPORTS_SET_COLUMN_TYPE,
SUPPORTS_SET_FIELD_TYPE(fallback -> fallback.test(SUPPORTS_SET_COLUMN_TYPE) && fallback.test(SUPPORTS_ROW_TYPE)),
SUPPORTS_SET_FIELD_TYPE_IN_ARRAY(fallback -> fallback.test(SUPPORTS_SET_FIELD_TYPE) && fallback.test(SUPPORTS_ADD_FIELD_IN_ARRAY)),
SUPPORTS_SET_FIELD_TYPE_IN_MAP(SUPPORTS_SET_FIELD_TYPE),

SUPPORTS_COMMENT_ON_TABLE,
SUPPORTS_COMMENT_ON_COLUMN(SUPPORTS_COMMENT_ON_TABLE),
Expand Down