PostgreSQL \COPY fails "ERROR: missing data for column "column name2""
The PostgreSQL server \COPY command is very simple and just aborts on a single failure. You might think that it could do far better (I know I do), but there's a reason that the PostgreSQL codebase is so compact with respect to MySQL's (by a factor of ~ 10/1).

However, there is the (very) nice pgloader programme which compensates for this at the price of having to run a separate utility. 

Of course, if you're good at the PL/pgSQL language (internal to the the server), then maybe you could explore that route - but why reinvent the wheel? Python and Perl also have internal PostgreSQL options. Then of course, there's all the languages under the sun external to the server.

From the manual:


  PgLoader Reference Manual
  
  pgloader loads data from various sources into PostgreSQL. It can
  transform the data it reads on the fly and submit raw SQL before and
  after the loading. It uses the COPY PostgreSQL protocol to stream the
  data into the server, and manages errors by filling a pair of
  reject.dat and reject.log files.


which appears to be right up your alley?

The way it works is: (sorry for the long quote)

TL;DR  - pgloader loads a batch (configurable) at a time. On failure, it "marks the spot", uses \COPY again up until that point, stops, then puts the bad record into a file and continues from bad-record + 1.


  Batches And Retry Behaviour
  
  To load data to PostgreSQL, pgloader uses the COPY streaming protocol.
  While this is the faster way to load data, COPY has an important
  drawback: as soon as PostgreSQL emits an error with any bit of data
  sent to it, whatever the problem is, the whole data set is rejected by
  PostgreSQL.
  
  To work around that, pgloader cuts the data into batches of 25000 rows
  each, so that when a problem occurs it's only impacting that many rows
  of data. Each batch is kept in memory while the COPY streaming
  happens, in order to be able to handle errors should some happen.
  
  When PostgreSQL rejects the whole batch, pgloader logs the error
  message then isolates the bad row(s) from the accepted ones by
  retrying the batched rows in smaller batches. To do that, pgloader
  parses the CONTEXT error message from the failed COPY, as the message
  contains the line number where the error was found in the batch, as in
  the following example:
  
  CONTEXT: COPY errors, line 3, column b: "2006-13-11"
  
  Using that information, pgloader will reload all rows in the batch
  before the erroneous one, log the erroneous one as rejected, then try
  loading the remaining of the batch in a single attempt, which may or
  may not contain other erroneous data.
  
  At the end of a load containing rejected rows, you will find two files
  in the root-dir location, under a directory named the same as the
  target database of your setup. The filenames are the target table, and
  their extensions are .dat for the rejected data and .log for the file
  containing the full PostgreSQL client side logs about the rejected
  data.