This commit adds three functions for low-level explorationof the index's rum pages:1) rum_metapage_info() -- is used to examine the informationposted on the meta page (flags: {meta}).2) rum_page_opaque_info() -- is used to examine informationthat is placed in the opaque area of the index page (anyindex page).3) rum_leaf_data_page_items() -- is used to examine theinformation that is placed on the leaf pages of theposting tree (flags: {leaf, data}).To extract information, all these functions need to passthe index name and the page number.Tags: rum

1) rum_internal_data_page_items() - it is intended for viewing information   that is located on the internal pages of the posting tree (flags {data}).2) rum_leaf_entry_page_items() - it is intended for viewing information   that is located on the leaf pages of the entry tree (flags {leaf}).3) rum_internal_entry_page_items() - it is intended for viewing information   that is located on the internal pages of the entry tree (flags {}).To extract information, all these functions need to pass the index nameand the page number.Tags: rum

If you create an index with the operator class rum_tsvector_ops,the positions of the lexemes will be saved as additional information.The positions are stored in compressed form in bytea.There is a problem that is related to the fact that in the posting tree,additional information for the senior keys is stored in a different way,which is why it has not yet been possible to output it. For all othercases, the output of additional information works correctly.Tags: rum

If the index is created with the appropriate class of operators,then in addition to the positions of the lexemes, weights (A, B, C, D)are also stored in the additional information. Their output has been added.In addition, Asserts have been added to the find_add_info_atr_num() andfind_add_info_oid() functions, which check that there is only one (or zero)type of additional information in the index.Tags: rum

The crashes were due to the fact that the construct_array_builtin()function is not defined on versions below 16.Tags: rum

The crashes were due to the fact that the errdetail_relkind_not_supported()function is not defined on versions below 15.Tags: rum

The crashes were due to the fact that theMONEYOID is not defined on versions below 14.Tags: rum