diff --git a/lib/Migration/Version1000Date20260309120000.php b/lib/Migration/Version1000Date20260309120000.php
index cb32ee9..b0c6b04 100644
--- a/lib/Migration/Version1000Date20260309120000.php
+++ b/lib/Migration/Version1000Date20260309120000.php
@@ -64,7 +64,7 @@ public function changeSchema(IOutput $output, Closure $schemaClosure, array $opt
 			$table->addColumn('created_at', Types::DATETIME, []);
 			$table->addColumn('updated_at', Types::DATETIME, []);
 
-			$table->setPrimaryKey(['id']);
+			$table->setPrimaryKey(['id'], 'pf_definitions_pk');
 			$table->addUniqueIndex(['field_key'], 'profile_fields_def_key_uk');
 			$table->addIndex(['active', 'sort_order'], 'pf_def_active_sort_idx');
 		}
@@ -91,8 +91,8 @@ public function changeSchema(IOutput $output, Closure $schemaClosure, array $opt
 			]);
 			$table->addColumn('updated_at', Types::DATETIME, []);
 
-			$table->setPrimaryKey(['id']);
-			$table->addUniqueIndex(['field_definition_id', 'user_uid'], 'profile_fields_val_field_user_uk');
+			$table->setPrimaryKey(['id'], 'pf_values_pk');
+			$table->addUniqueIndex(['field_definition_id', 'user_uid'], 'pf_val_def_user_uk');
 			$table->addIndex(['user_uid'], 'profile_fields_val_user_idx');
 			$table->addIndex(['field_definition_id'], 'profile_fields_val_field_idx');
 			$table->addForeignKeyConstraint(
diff --git a/tests/php/Unit/Migration/Version1000Date20260309120000Test.php b/tests/php/Unit/Migration/Version1000Date20260309120000Test.php
new file mode 100644
index 0000000..982a3ca
--- /dev/null
+++ b/tests/php/Unit/Migration/Version1000Date20260309120000Test.php
@@ -0,0 +1,159 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2026 LibreCode coop and contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+declare(strict_types=1);
+
+namespace OCA\ProfileFields\Tests\Unit\Migration;
+
+use Doctrine\DBAL\Platforms\AbstractPlatform;
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\DBAL\Schema\Table;
+use OCA\ProfileFields\Migration\Version1000Date20260309120000;
+use OCP\DB\ISchemaWrapper;
+use OCP\Migration\IOutput;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Verifies Nextcloud Oracle naming constraints for Version1000Date20260309120000.
+ *
+ * NC 32 ensureOracleConstraints rules (lib/private/DB/MigrationService.php):
+ *  - Table names (without prefix) must be <= 27 chars
+ *  - Column names must be <= 30 chars
+ *  - Index names must be <= 30 chars
+ *  - FK names must be <= 30 chars
+ *  - Primary key: if default name ('primary'), table name without prefix must be < 23 chars;
+ *    otherwise explicit name must be <= 30 chars
+ */
+class Version1000Date20260309120000Test extends TestCase {
+	private const PREFIX = 'oc_';
+	private const ORACLE_MAX_NAME = 30;
+	private const ORACLE_MAX_TABLE = 27;
+	/** Table name (without prefix) must be < 23 chars to use default PK name */
+	private const ORACLE_MAX_TABLE_FOR_DEFAULT_PK = 23;
+
+	private Schema $schema;
+
+	protected function setUp(): void {
+		parent::setUp();
+		$this->schema = new Schema();
+	}
+
+	private function buildSchemaWrapper(Schema $schema, string $prefix): ISchemaWrapper {
+		return new class($schema, $prefix) implements ISchemaWrapper {
+			public function __construct(
+				private Schema $schema,
+				private string $prefix,
+			) {
+			}
+
+			public function hasTable($tableName): bool {
+				return $this->schema->hasTable($this->prefix . $tableName);
+			}
+
+			public function createTable($tableName): Table {
+				return $this->schema->createTable($this->prefix . $tableName);
+			}
+
+			public function getTable($tableName): Table {
+				return $this->schema->getTable($this->prefix . $tableName);
+			}
+
+			public function dropTable($tableName): Schema {
+				return $this->schema->dropTable($this->prefix . $tableName);
+			}
+
+			public function getTables(): array {
+				return $this->schema->getTables();
+			}
+
+			public function getTableNames(): array {
+				return $this->schema->getTableNames();
+			}
+
+			public function getTableNamesWithoutPrefix(): array {
+				return array_map(
+					fn (string $n) => substr($n, strlen($this->prefix)),
+					$this->schema->getTableNames(),
+				);
+			}
+
+			public function getDatabasePlatform(): AbstractPlatform {
+				throw new \RuntimeException('not implemented in test');
+			}
+
+			public function dropAutoincrementColumn(string $table, string $column): void {
+				throw new \RuntimeException('not implemented in test');
+			}
+		};
+	}
+
+	public function testAllNamesPassOracleConstraints(): void {
+		$wrapper = $this->buildSchemaWrapper($this->schema, self::PREFIX);
+		$output = $this->createMock(IOutput::class);
+		$migration = new Version1000Date20260309120000();
+
+		$migration->changeSchema($output, fn () => $wrapper, ['tablePrefix' => self::PREFIX]);
+
+		$prefixLen = strlen(self::PREFIX);
+
+		foreach ($this->schema->getTables() as $table) {
+			$tableNameWithoutPrefix = substr($table->getName(), $prefixLen);
+
+			$this->assertLessThanOrEqual(
+				self::ORACLE_MAX_TABLE,
+				strlen($tableNameWithoutPrefix),
+				"Table '{$table->getName()}' name without prefix exceeds Oracle max of " . self::ORACLE_MAX_TABLE . ' chars',
+			);
+
+			foreach ($table->getColumns() as $column) {
+				$this->assertLessThanOrEqual(
+					self::ORACLE_MAX_NAME,
+					strlen($column->getName()),
+					"Column '{$column->getName()}' on '{$table->getName()}' exceeds Oracle max of " . self::ORACLE_MAX_NAME . ' chars',
+				);
+			}
+
+			foreach ($table->getIndexes() as $index) {
+				$this->assertLessThanOrEqual(
+					self::ORACLE_MAX_NAME,
+					strlen($index->getName()),
+					"Index '{$index->getName()}' on '{$table->getName()}' exceeds Oracle max of " . self::ORACLE_MAX_NAME . ' chars',
+				);
+			}
+
+			foreach ($table->getForeignKeys() as $fk) {
+				$this->assertLessThanOrEqual(
+					self::ORACLE_MAX_NAME,
+					strlen($fk->getName()),
+					"FK '{$fk->getName()}' on '{$table->getName()}' exceeds Oracle max of " . self::ORACLE_MAX_NAME . ' chars',
+				);
+			}
+
+			$primaryKey = $table->getPrimaryKey();
+			if ($primaryKey !== null) {
+				$pkName = strtolower($primaryKey->getName());
+				if ($pkName === 'primary') {
+					// Default PK name: table name without prefix must be strictly < 23 chars
+					$this->assertLessThan(
+						self::ORACLE_MAX_TABLE_FOR_DEFAULT_PK,
+						strlen($tableNameWithoutPrefix),
+						"Table '{$tableNameWithoutPrefix}' uses default primary key name but its length "
+						. strlen($tableNameWithoutPrefix)
+						. ' >= ' . self::ORACLE_MAX_TABLE_FOR_DEFAULT_PK
+						. '; set an explicit primary key name <= 30 chars',
+					);
+				} else {
+					$this->assertLessThanOrEqual(
+						self::ORACLE_MAX_NAME,
+						strlen($pkName),
+						"Primary key name '$pkName' on '{$table->getName()}' exceeds Oracle max of " . self::ORACLE_MAX_NAME . ' chars',
+					);
+				}
+			}
+		}
+	}
+}