PREHOOK: query: DESCRIBE FUNCTION regexp_extract
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION regexp_extract
POSTHOOK: type: DESCFUNCTION
regexp_extract(str, regexp[, idx]) - extracts a group that matches regexp
PREHOOK: query: DESCRIBE FUNCTION EXTENDED regexp_extract
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION EXTENDED regexp_extract
POSTHOOK: type: DESCFUNCTION
regexp_extract(str, regexp[, idx]) - extracts a group that matches regexp
Example:
  > SELECT regexp_extract('100-200', '(\d+)-(\d+)', 1) FROM src LIMIT 1;
  '100'