* store proj4string for geometry data frame mode .R_df_defs (?)
 

* pgIntersectPts (pg-functions.R) -> move to rpostgisLT(?)

* pgIntersectStp (pgIntersectsSts in pg-functions.R) -> move to rpostgisLT(?)

* Change pgAddKey into pgKey (+ action = "drop"?)

* pgIndex, pgComment --> action = "drop"?

* pgColumn --> action = "rename"? (and other functions?) ou bien pgRename( table, index, sequence, view, column )?

7/21/16

* add st_isvalid check to pgGet* functions(?)

5/3/17

* create internal function to handle data frame mode process (for use in dbWriteDataFrame, and rpostgisLT infolocs writing).

6/2/2017

* clauses for pgGetBoundary

* 'proj' argument in GET functions to return data in different projection

KNOWN ISSUES

* writing with wkb does not support MULTIPOLYGONS, LINESTRINGS




