PostGIS  2.3.7dev-r@@SVN_REVISION@@
PG_FUNCTION_INFO_V1 ( transform_geom  )

Transform_geom( GEOMETRY, TEXT (input proj4), TEXT (output proj4), INT (output srid)

tmpPts - if there is a nadgrid error (-38), we re-try the transform on a copy of points. The transformed points are in an indeterminate state after the -38 error is thrown.