Add unit test

Signed-off-by: Vitor Mattos <vitor@php.rio>

lib/private/DB/QueryBuilder/FunctionBuilder/FunctionBuilder.php

@@ -54,14 +54,9 @@ class FunctionBuilder implements IFunctionBuilder {
 		return new QueryFunction('CONCAT(' . $this->helper->quoteColumnName($x) . ', ' . $this->helper->quoteColumnName($y) . ')');
 	}
 
-	public function groupConcat($expr, ?string $separator = ',', ?string $orderBy = null): IQueryFunction {
-		if (is_null($orderBy)) {
-			$orderByClause = '';
-		} else {
-			$orderByClause = ' ORDER BY ' . $orderBy;
-		}
+	public function groupConcat($expr, ?string $separator = ','): IQueryFunction {
 		$separator = $this->connection->quote($separator);
-		return new QueryFunction('GROUP_CONCAT(' . $this->helper->quoteColumnName($expr) . $orderByClause . ' SEPARATOR ' . $separator . ')');
+		return new QueryFunction('GROUP_CONCAT(' . $this->helper->quoteColumnName($expr) . ' SEPARATOR ' . $separator . ')');
 	}
 
 	public function substring($input, $start, $length = null): IQueryFunction {

lib/private/DB/QueryBuilder/FunctionBuilder/OCIFunctionBuilder.php

@@ -73,11 +73,8 @@ class OCIFunctionBuilder extends FunctionBuilder {
 		return parent::least($x, $y);
 	}
 
-	public function groupConcat($expr, ?string $separator = ',', ?string $orderBy = null): IQueryFunction {
-		if (is_null($orderBy)) {
-			$orderBy = 'NULL';
-		}
-		$orderByClause = ' WITHIN GROUP(ORDER BY ' . $orderBy . ')';
+	public function groupConcat($expr, ?string $separator = ','): IQueryFunction {
+		$orderByClause = ' WITHIN GROUP(ORDER BY NULL)';
 		if (is_null($separator)) {
 			return new QueryFunction('LISTAGG(' . $this->helper->quoteColumnName($expr) . $orderByClause . ')');
 		}

lib/private/DB/QueryBuilder/FunctionBuilder/PgSqlFunctionBuilder.php

@@ -31,15 +31,11 @@ class PgSqlFunctionBuilder extends FunctionBuilder {
 		return new QueryFunction('(' . $this->helper->quoteColumnName($x) . ' || ' . $this->helper->quoteColumnName($y) . ')');
 	}
 
-	public function groupConcat($expr, ?string $separator = ',', ?string $orderBy = null): IQueryFunction {
-		if (is_null($orderBy)) {
-			$orderByClause = '';
-		} else {
-			$orderByClause = ' ORDER BY ' . $orderBy;
-		}
+	public function groupConcat($expr, ?string $separator = ','): IQueryFunction {
 		if (is_null($separator)) {
-			return new QueryFunction('string_agg(' . $this->helper->quoteColumnName($expr) . $orderByClause . ')');
+			return new QueryFunction('string_agg(cast(' . $this->helper->quoteColumnName($expr) . ' AS varchar)');
 		}
-		return new QueryFunction('string_agg(' . $this->helper->quoteColumnName($expr) . ", '$separator'$orderByClause)");
+		$separator = $this->connection->quote($separator);
+		return new QueryFunction('string_agg(cast(' . $this->helper->quoteColumnName($expr) . " AS varchar), $separator)");
 	}
 }

lib/private/DB/QueryBuilder/FunctionBuilder/SqliteFunctionBuilder.php

@@ -31,9 +31,9 @@ class SqliteFunctionBuilder extends FunctionBuilder {
 		return new QueryFunction('(' . $this->helper->quoteColumnName($x) . ' || ' . $this->helper->quoteColumnName($y) . ')');
 	}
 
-	public function groupConcat($expr, ?string $separator = ',', ?string $orderBy = null): IQueryFunction {
-		$separator = $this->helper->quoteColumnName($separator);
-		return new QueryFunction('GROUP_CONCAT(' . $this->helper->quoteColumnName($expr) . "$separator)");
+	public function groupConcat($expr, ?string $separator = ','): IQueryFunction {
+		$separator = $this->connection->quote($separator);
+		return new QueryFunction('GROUP_CONCAT(' . $this->helper->quoteColumnName($expr) . ", $separator)");
 	}
 
 	public function greatest($x, $y): IQueryFunction {

lib/public/DB/QueryBuilder/IFunctionBuilder.php

@@ -62,11 +62,10 @@ interface IFunctionBuilder {
 	 *
 	 * @param string|ILiteral|IParameter|IQueryFunction $expr The expression to group
 	 * @param string|null $separator The separator
-	 * @param string|null $orderBy Optional SQL expression (and direction) to order the grouped rows by.
 	 * @return IQueryFunction
 	 * @since 24.0.0
 	 */
-	public function groupConcat($expr, ?string $separator = ',', ?string $orderBy = null): IQueryFunction;
+	public function groupConcat($expr, ?string $separator = ','): IQueryFunction;
 
 	/**
 	 * Takes a substring from the input string

tests/lib/DB/QueryBuilder/FunctionBuilderTest.php

@@ -54,12 +54,38 @@ class FunctionBuilderTest extends TestCase {
 		$this->assertEquals('foobar', $column);
 	}
 
-	public function testGroupConcatWithoutSeparatorAndOrder() {
+	protected function clearDummyData() {
+		$delete = $this->connection->getQueryBuilder();
+
+		$delete->delete('appconfig')
+			->where($delete->expr()->eq('appid', $delete->createNamedParameter('group_concat', IQueryBuilder::PARAM_STR)));
+		$delete->executeStatement();
+	}
+
+	protected function addDummyData() {
+		$this->clearDummyData();
+		$insert = $this->connection->getQueryBuilder();
+
+		$insert->insert('appconfig')
+			->setValue('appid', $insert->createNamedParameter('group_concat', IQueryBuilder::PARAM_STR))
+			->setValue('configvalue', $insert->createNamedParameter('unittest', IQueryBuilder::PARAM_STR))
+			->setValue('configkey', $insert->createParameter('value', IQueryBuilder::PARAM_STR));
+
+		$insert->setParameter('value', '1');
+		$insert->executeStatement();
+		$insert->setParameter('value', '3');
+		$insert->executeStatement();
+		$insert->setParameter('value', '2');
+		$insert->executeStatement();
+	}
+
+	public function testGroupConcatWithoutSeparator() {
+		$this->addDummyData();
 		$query = $this->connection->getQueryBuilder();
 
-		$query->select($query->func()->groupConcat('appid'));
-		$query->from('appconfig')
-			->setMaxResults(1);
+		$query->select($query->func()->groupConcat('configkey'))
+			->from('appconfig')
+			->where($query->expr()->eq('appid', $query->createNamedParameter('group_concat')));
 
 		$result = $query->execute();
 		$column = $result->fetchOne();
@@ -70,9 +96,9 @@ class FunctionBuilderTest extends TestCase {
 	public function testGroupConcatWithSeparatorAndOrder() {
 		$query = $this->connection->getQueryBuilder();
 
-		$query->select($query->func()->groupConcat('appid', '#', 'appid'));
-		$query->from('appconfig')
-			->setMaxResults(1);
+		$query->select($query->func()->groupConcat('configkey', '#'))
+			->from('appconfig')
+			->where($query->expr()->eq('appid', $query->createNamedParameter('group_concat')));
 
 		$result = $query->execute();
 		$column = $result->fetchOne();