“Indices” is the mathematical formulation whereas in publishing they use “indexes” (which is probably why so many people in IT consider “indices” to be more correct than “indexes”).
I think that a table index is analogous to an index in a book rather than an exponent in maths, so the publishing variant is the appropriate plural to use in this context.
Furthermore, at least in Oracle, the data dictionary views are called DBA_INDEXES, ALL_INDEXES and USER_INDEXES. It is usually a good idea to employ the same terminology which the domain uses.