sql.py: pkey(): Fixed bug where queries were not being cached. Use select() instead of run_query() so that caching is automatically turned on and table names are automatically escaped.

streams.py: Added LineCountInputStream, which is faster than LineCountStream for input streams. Added InputStreamsOnlyException and raise it in all *InputStream classes' write() methods.

sql.py: DbConn: For non-cacheable queries, use a plain cursor() instead of a DbCursor to avoid the overhead of saving the result and wrapping the cursor

Moved db_config_names from bin/map to sql.py so it can be used by other scripts as well

csv2ddl: Also print a COPY FROM statement

input.Makefile: Fixed bug where input type was considered to be different things if both $(inputFiles) and $(dbExport) are non-empty. Now, $(inputFiles) takes precedence so that the presence of any input files will cause a DB dump to be ignored. This ensures that a (slower) input DB is not used over a (faster) flat file.

csvs.py: stream_info(): Added parse_header option. reader_and_header(): Use stream_info()'s new parse_header option.

csv2ddl: Renamed schema name env var from datasrc to schema to reflect what it is, and to make the script general beyond importing inputs

input.Makefile: Moved Installation, Staging tables after Existing maps discovery because they depend on it. Staging tables: Create a staging table for each table a map spreadsheet is available for. Put double quotes around the schema name so its case is preserved.

Added csv2ddl to make a PostgreSQL CREATE TABLE statement from a CSV header