GET/SET PROPERTY statement

These SQL commands allow get/set value of both system and user-defined properties of such database objects as Engine, Database, Table, Field, Link, Server.

get_property
    :	GET PROPERTY props_name_list OF DATABASE
    |	GET PROPERTY props_name_list OF TABLE table_name 
    |	GET PROPERTY props_name_list OF FIELD column_reference 
    |	GET PROPERTY props_name_list OF LINK link_name 
    |	GET PROPERTY props_name_list OF SERVER 
    |	GET PROPERTY props_name_list OF CONNECTION
    |	GET PROPERTY props_name_list 

set_property
    :	SET PROPERTY props_name_list OF DATABASE TO value_list
    |	SET PROPERTY props_name_list OF TABLE table_name TO value_list
    |	SET PROPERTY props_name_list OF FIELD column_reference TO value_list
    |	SET PROPERTY props_name_list OF LINK link_name TO value_list
    |	SET PROPERTY props_name_list OF SERVER TO value_list
    |	SET PROPERTY props_name_list OF CONNECTION TO value_list
    |	SET PROPERTY props_name_list TO value_list

props_name_list
    :    property_name, ...

values_list
    :    value_elem, ...

value_elem
    :    character_string_literal
    |    signed_numeric_literal
    |    TRUE
    |    FALSE
    |    NULL

Let's note first of all that these SQL commands can be applied to objects of 3 types:

• Valentina Engine - parameters of engine are not stored at any place, so they are runtime only.
• Database, Table, Link, Field - description of these objects is stored into system tables.
• SERVER - parameters of Valentina Server are stored into ini file.