alfresco-community-repo/config/alfresco/ibatis/org.hibernate.dialect.MySQLInnoDBDialect/node-update-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},
            child.version = child.version + 1,
            child.transaction_id = #{txnId}
        where
            assoc.parent_node_id = #{primaryParentNodeId}
            and
            (
                child.acl_id is null 
                <if test="optionalOldSharedAclIdInAdditionToNull != null"> OR child.acl_id = #{optionalOldSharedAclIdInAdditionToNull}</if>
            )
    </update>
    
    <!--
        ANSI subselect is not performant on MySQL.  Use non-ANSI join syntax. 
    -->
    <update id="update_ChildrenTxns" parameterType="ChildAssoc">
        update
            alf_node n
            join alf_child_assoc ca on (ca.child_node_id = n.id)
        set
            n.version = n.version + 1,
            n.transaction_id = #{parentNode.transaction.id}
        where
            ca.parent_node_id = #{parentNode.id}
            <if test="isPrimary == true">and ca.is_primary = #{isPrimary}</if>
    </update>

</mapper>