diff --git a/lib/private/DB/Schema/Index.php b/lib/private/DB/Schema/Index.php
index 82c9538b6681c..c75eec21df4ef 100644
--- a/lib/private/DB/Schema/Index.php
+++ b/lib/private/DB/Schema/Index.php
@@ -60,6 +60,11 @@ public function hasColumnAtPosition(string $name, int $position = 0): bool {
 		return $this->index->hasColumnAtPosition($name, $position);
 	}
 
+	#[\Override]
+	public function spansColumns(array $columnNames): bool {
+		return $this->index->spansColumns($columnNames);
+	}
+
 	/**
 	 * Forwards any method not declared on IIndex to the wrapped Doctrine
 	 * DBAL index, e.g. mutators like `addFlag()` or `removeFlag()` that are
diff --git a/lib/private/DB/Schema/Table.php b/lib/private/DB/Schema/Table.php
index d8b99cfa5ce65..dc07a71f0bdf4 100644
--- a/lib/private/DB/Schema/Table.php
+++ b/lib/private/DB/Schema/Table.php
@@ -83,6 +83,20 @@ public function addUniqueConstraint(
 		return $this;
 	}
 
+	#[\Override]
+	public function hasUniqueConstraint(string $name): bool {
+		return $this->table->hasUniqueConstraint($name);
+	}
+
+	#[\Override]
+	public function removeUniqueConstraint(string $name): void {
+		try {
+			$this->table->removeUniqueConstraint($name);
+		} catch (DBALSchemaException $e) {
+			throw new SchemaException($e->getMessage(), $e->getCode(), $e);
+		}
+	}
+
 	#[\Override]
 	public function dropPrimaryKey(): self {
 		try {
@@ -101,6 +115,11 @@ public function getPrimaryKey(): ?IIndex {
 		return $primaryKey !== null ? new Index($primaryKey) : null;
 	}
 
+	#[\Override]
+	public function hasPrimaryKey(): bool {
+		return $this->table->hasPrimaryKey();
+	}
+
 	#[\Override]
 	public function dropIndex(string $name): self {
 		try {
diff --git a/lib/public/DB/Schema/IIndex.php b/lib/public/DB/Schema/IIndex.php
index af2ca8309ef28..a850116458a01 100644
--- a/lib/public/DB/Schema/IIndex.php
+++ b/lib/public/DB/Schema/IIndex.php
@@ -62,4 +62,13 @@ public function isSimpleIndex(): bool;
 	 * @since 35.0.0
 	 */
 	public function hasColumnAtPosition(string $name, int $position = 0): bool;
+
+	/**
+	 * Returns whether the given column names exactly match the columns this index spans,
+	 * regardless of order.
+	 *
+	 * @param list<non-empty-lowercase-string> $columnNames
+	 * @since 35.0.0
+	 */
+	public function spansColumns(array $columnNames): bool;
 }
diff --git a/lib/public/DB/Schema/ITable.php b/lib/public/DB/Schema/ITable.php
index 35311b0269062..4745d65fd49fa 100644
--- a/lib/public/DB/Schema/ITable.php
+++ b/lib/public/DB/Schema/ITable.php
@@ -62,6 +62,24 @@ public function addUniqueConstraint(
 		array $options = [],
 	): self;
 
+	/**
+	 * Returns whether this table has a unique constraint with the given name.
+	 *
+	 * @param non-empty-string $name The unique constraint name.
+	 * @since 35.0.0
+	 */
+	public function hasUniqueConstraint(string $name): bool;
+
+	/**
+	 * Removes the unique constraint with the given name.
+	 *
+	 * @param non-empty-string $name The unique constraint name.
+	 *
+	 * @throws SchemaException If the unique constraint does not exist.
+	 * @since 35.0.0
+	 */
+	public function removeUniqueConstraint(string $name): void;
+
 	/**
 	 * Drops the primary key from this table.
 	 *
@@ -77,6 +95,13 @@ public function dropPrimaryKey(): self;
 	 */
 	public function getPrimaryKey(): ?IIndex;
 
+	/**
+	 * Returns whether this table has a primary key.
+	 *
+	 * @since 35.0.0
+	 */
+	public function hasPrimaryKey(): bool;
+
 	/**
 	 * Drops an index from this table.
 	 *