PREHOOK: query: DESCRIBE FUNCTION lpad
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION lpad
POSTHOOK: type: DESCFUNCTION
lpad(str, len, pad) - Returns str, left-padded with pad to a length of len
PREHOOK: query: DESCRIBE FUNCTION EXTENDED lpad
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION EXTENDED lpad
POSTHOOK: type: DESCFUNCTION
lpad(str, len, pad) - Returns str, left-padded with pad to a length of len
If str is longer than len, the return value is shortened to len characters.
Example:
  > SELECT lpad('hi', 5, '??') FROM src LIMIT 1;
  '???hi'  > SELECT lpad('hi', 1, '??') FROM src LIMIT 1;
  'h'
PREHOOK: query: EXPLAIN SELECT
  lpad('hi', 1, '?'),
  lpad('hi', 5, '.'),
  lpad('hi', 6, '123')
FROM src tablesample (1 rows)
PREHOOK: type: QUERY
POSTHOOK: query: EXPLAIN SELECT
  lpad('hi', 1, '?'),
  lpad('hi', 5, '.'),
  lpad('hi', 6, '123')
FROM src tablesample (1 rows)
POSTHOOK: type: QUERY
STAGE DEPENDENCIES:
  Stage-0 is a root stage

STAGE PLANS:
  Stage: Stage-0
    Fetch Operator
      limit: -1
      Processor Tree:
        TableScan
          alias: src
          Row Limit Per Split: 1
          Statistics: Num rows: 500 Data size: 5312 Basic stats: COMPLETE Column stats: COMPLETE
          Select Operator
            expressions: 'h' (type: string), '...hi' (type: string), '1231hi' (type: string)
            outputColumnNames: _col0, _col1, _col2
            Statistics: Num rows: 500 Data size: 132000 Basic stats: COMPLETE Column stats: COMPLETE
            ListSink

PREHOOK: query: SELECT
  lpad('hi', 1, '?'),
  lpad('hi', 5, '.'),
  lpad('hi', 6, '123')
FROM src tablesample (1 rows)
PREHOOK: type: QUERY
PREHOOK: Input: default@src
#### A masked pattern was here ####
POSTHOOK: query: SELECT
  lpad('hi', 1, '?'),
  lpad('hi', 5, '.'),
  lpad('hi', 6, '123')
FROM src tablesample (1 rows)
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
#### A masked pattern was here ####
h	...hi	1231hi