xml_func.py: _if(): Documented that it must be run to remove conditions that functions._if() can't handle

README.TXT: Datasource setup: Testing: Added step to test column-based import (by_col=1), because it is stricter about types than row-based import and sometimes fails when row-based import succeeds

schemas/functions.sql: _nullIf(): Polymorphically support other datatypes besides text

bin/map: Clearing errors table: Fixed bug where needed to check if sql_io.errors_table() returned None (indicating that the errors table didn't exist) before calling sql.drop_table()

bin/map: Clearing errors table: Fixed bug where needed to use sql.drop_table() instead of sql.truncate() now that errors tables are not created until column-based import runs

input.Makefile: Maps validation: $(missingMappingsCmd): Fixed bug where need to use system's sort, not bin/sort, now that bin/ is added to the PATH by this makefile

inputs/SALVIAS/verify/plots.ref: Regenerated on PostgreSQL staging tables. The orders have changed slightly because this is derived from a PostgreSQL translation of the queries, with corresponding changes in collations and NULL sort orders. The counts have also changed slightly, possibly due to the changes Brad made to the salvias_plots database on nimoy after the initial version was downloaded. (The current counts are correct according to the current salvias_plots database.)

inputs/SALVIAS/verify/plots.ref.sql: # locations: Fixed bug where a NULL value in LatDec or LongDec would propagate to the concatenated value, reducing its uniqueness

inputs/SALVIAS/verify/plots.ref.sql: Retrofitted to work with PostgreSQL staging tables

schemas/vegbien.sql: project: Added project_unique_name_date unique index for projects that don't have a sourceaccessioncode