undeclare_foreign_key

Description:

[ Version ( since = "4.2.4" ) ]
public bool undeclare_foreign_key (MetaStruct? mstruct, string fk_name, string? catalog, string? schema, string table, string? ref_catalog, string? ref_schema, string ref_table) throws Error

Removes a declared foreign key from this.

This method begins a transaction if possible (ie. none is already started), and if it can't, then if there is an error, the job may be partially done.

A check is always performed to make sure all the database objects actually exist and returns an error if not. The check is performed using mstruct if it's not null (in this case only the tables already represented in mstruct will be considered, in other words: mstruct will not be modified), and using an internal MetaStruct is null.

See declare_foreign_key for more information anout the catalog, schema, name, ref_catalog, ref_schema and ref_name arguments.

Parameters:

this	a MetaStore
mstruct	a MetaStruct, or `null`
fk_name	the name of the foreign key to declare
catalog	the catalog in which the table (for which the foreign key is for) is, or `null`
schema	the schema in which the table (for which the foreign key is for) is, or `null`
table	the name of the table (for which the foreign key is for)
ref_catalog	the catalog in which the referenced table is, or `null`
ref_schema	the schema in which the referenced table is, or `null`
ref_table	the name of the referenced table

Returns:

true if no error occurred