Warning g_relation_index has been deprecated since version 2.26 and should not be used in newly-written code. Rarely used API Creates an index on the given field. Note that this must be called before any records are added to the GRelation.
the field to index, counting from 0.
a function to produce a hash value from the field data.
a function to compare two values of the given field.
See Implementation
Warning g_relation_index has been deprecated since version 2.26 and should not be used in newly-written code. Rarely used API Creates an index on the given field. Note that this must be called before any records are added to the GRelation.