index_name_exists?

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb, line 129
        def index_name_exists?(table_name, index_name, default)
          exec_query(            SELECT COUNT(*)            FROM pg_class t            INNER JOIN pg_index d ON t.oid = d.indrelid            INNER JOIN pg_class i ON d.indexrelid = i.oid            WHERE i.relkind = 'i'              AND i.relname = '#{index_name}'              AND t.relname = '#{table_name}'              AND i.relnamespace IN (SELECT oid FROM pg_namespace WHERE nspname = ANY (current_schemas(false)) ), 'SCHEMA').rows.first[0].to_i > 0
        end