Question

Consider the following DB schema:

CREATE UNIQUE INDEX blah1 ON table1(length);
CREATE INDEX blah2 ON table3(name);
CREATE INDEX blah3 ON table3 USING btree(id);

I want to write a small awk script that would return the names of the indices and tables, e.g.:

 blah1, table1
 blah2, table2
 blah3, table3

I need to match the word that comes after the word INDEX and the word that comes after the word ON and ends with ( or whitespace.

Any idea how to do it using a regex match, without iterating over all $NFs?

Answer 1

I don’t know awk well, but this seems to work:

awk 'BEGIN{ FS="INDEX | ON "}{gsub(/[ (].*/,"",$3); print $2", " $3}' test.dat