Fixes BaseBuilder getWhere() bug

system/Database/BaseBuilder.php

@@ -1647,13 +1647,15 @@ public function getCompiledQBWhere()
 	 *
 	 * Allows the where clause, limit and offset to be added directly
 	 *
-	 * @param string|array $where
-	 * @param integer      $limit
-	 * @param integer      $offset
+	 * @param string|array $where     Where condition
+	 * @param integer      $limit     Limit value
+	 * @param integer      $offset    Offset value
+	 * @param boolean      $returnSQL If true, returns the generate SQL, otherwise executes the query.
+	 * @param boolean      $reset     Are we want to clear query builder values?
 	 *
 	 * @return ResultInterface
 	 */
-	public function getWhere($where = null, int $limit = null, int $offset = null)
+	public function getWhere($where = null, int $limit = null, ?int $offset = 0, bool $returnSQL = false, bool $reset = true)
 	{
 		if ($where !== null)
 		{
@@ -1665,8 +1667,17 @@ public function getWhere($where = null, int $limit = null, int $offset = null)
 			$this->limit($limit, $offset);
 		}
 
-		$result = $this->db->query($this->compileSelect(), $this->binds, false);
-		$this->resetSelect();
+		$result = $returnSQL
+			? $this->getCompiledSelect($reset)
+			: $this->db->query($this->compileSelect(), $this->binds, false);
+
+		if ($reset === true)
+		{
+			$this->resetSelect();
+
+			// Clear our binds so we don't eat up memory
+			$this->binds = [];
+		}
 
 		return $result;
 	}

tests/system/Database/Builder/GetTest.php

@@ -44,4 +44,60 @@ public function testGetWithReset()
 		$this->assertEquals($expectedSQLafterreset, str_replace("\n", ' ', $builder->get(0, 50, true, true)));
 	}
 
+	//--------------------------------------------------------------------
+
+	/**
+	 * @see https://github.com/codeigniter4/CodeIgniter4/issues/2143
+	 */
+	public function testGetWhereWithLimit()
+	{
+		$builder = $this->db->table('users');
+
+		$expectedSQL             = 'SELECT * FROM "users" WHERE "username" = \'bogus\'  LIMIT 5';
+		$expectedSQLWithoutReset = 'SELECT * FROM "users" WHERE "username" = \'bogus\' AND "username" = \'bogus\'  LIMIT 5';
+
+		$this->assertEquals($expectedSQL, str_replace("\n", ' ', $builder->getWhere(['username' => 'bogus'], 5, null, true, false)));
+		$this->assertEquals($expectedSQLWithoutReset, str_replace("\n", ' ', $builder->getWhere(['username' => 'bogus'], 5, 0, true, true)));
+		$this->assertEquals($expectedSQL, str_replace("\n", ' ', $builder->getWhere(['username' => 'bogus'], 5, null, true, true)));
+	}
+
+	//--------------------------------------------------------------------
+
+	public function testGetWhereWithLimitAndOffset()
+	{
+		$builder = $this->db->table('users');
+
+		$expectedSQL             = 'SELECT * FROM "users" WHERE "username" = \'bogus\'  LIMIT 10, 5';
+		$expectedSQLWithoutReset = 'SELECT * FROM "users" WHERE "username" = \'bogus\' AND "username" = \'bogus\'  LIMIT 10, 5';
+
+		$this->assertEquals($expectedSQL, str_replace("\n", ' ', $builder->getWhere(['username' => 'bogus'], 5, 10, true, false)));
+		$this->assertEquals($expectedSQLWithoutReset, str_replace("\n", ' ', $builder->getWhere(['username' => 'bogus'], 5, 10, true, true)));
+		$this->assertEquals($expectedSQL, str_replace("\n", ' ', $builder->getWhere(['username' => 'bogus'], 5, 10, true, true)));
+	}
+
+	//--------------------------------------------------------------------
+
+	public function testGetWhereWithWhereConditionOnly()
+	{
+		$builder = $this->db->table('users');
+
+		$expectedSQL             = 'SELECT * FROM "users" WHERE "username" = \'bogus\'';
+		$expectedSQLWithoutReset = 'SELECT * FROM "users" WHERE "username" = \'bogus\' AND "username" = \'bogus\'';
+
+		$this->assertEquals($expectedSQL, str_replace("\n", ' ', $builder->getWhere(['username' => 'bogus'], null, null, true, false)));
+		$this->assertEquals($expectedSQLWithoutReset, str_replace("\n", ' ', $builder->getWhere(['username' => 'bogus'], null, null, true, true)));
+		$this->assertEquals($expectedSQL, str_replace("\n", ' ', $builder->getWhere(['username' => 'bogus'], null, null, true, true)));
+	}
+
+	//--------------------------------------------------------------------
+
+	public function testGetWhereWithoutArgs()
+	{
+		$builder = $this->db->table('users');
+
+		$expectedSQL = 'SELECT * FROM "users"';
+
+		$this->assertEquals($expectedSQL, str_replace("\n", ' ', $builder->getWhere(null, null, null, true, true)));
+	}
+
 }

user_guide_src/source/database/query_builder.rst

@@ -1084,11 +1084,13 @@ Class Reference
 		Compiles and runs SELECT statement based on the already
 		called Query Builder methods.
 
-	.. php:method:: getWhere([$where = NULL[, $limit = NULL[, $offset = NULL]]])
+	.. php:method:: getWhere([$where = NULL[, $limit = NULL[, $offset = NULL[, $returnSQL = FALSE[, $reset = TRUE]]]]])
 
 		:param	string	$where: The WHERE clause
 		:param	int	$limit: The LIMIT clause
 		:param	int	$offset: The OFFSET clause
+		:param 	bool $returnSQL: If true, returns the generate SQL, otherwise executes the query.
+		:param 	bool $reset: Do we want to clear query builder values?
 		:returns:	\CodeIgniter\Database\ResultInterface instance (method chaining)
 		:rtype:	\CodeIgniter\Database\ResultInterface