alfresco-community-repo/config/alfresco/ibatis/org.hibernate.dialect.MySQLInnoDBDialect/node-update-acl-SqlMap.xml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="alfresco.node.update">
    
    <!--
        MySQL does not allow the target table to be present in the subselect
    -->
    <update id="update_PrimaryChildrenSharedAcl" parameterType="PrimaryChildrenAclUpdate">
        update 
            alf_child_assoc assoc
            join alf_node child on (child.id = assoc.child_node_id and assoc.is_primary = #{isPrimary}) 
        set
            child.acl_id = #{newSharedAclId}
        where
            assoc.parent_node_id = #{primaryParentNodeId}
            and
            (
                child.acl_id is null 
                <if test="optionalOldSharedAclIdInAdditionToNull != null"> OR child.acl_id = #{optionalOldSharedAclIdInAdditionToNull}</if>
            )
    </update>

</mapper>