IMPALA-5607: Part 1 [DOCS] Return type changes for EXTRACT and DATE_PART
IMPALA-5607: Part 1 [DOCS] Return type changes for EXTRACT and DATE_PART

Change-Id: I0a7b1c2f984aac1d6d84480523d07a4125de1f52
Reviewed-on: http://gerrit.cloudera.org:8080/11044
Tested-by: Impala Public Jenkins <039b6b20426ff68ebe492b3021890d8c8fd010c9@cloudera.com>
Reviewed-by: Jinchul Kim <e5f4bb07e4a0a8c98e23c7fc14824186cd9e8310@gmail.com>
Reviewed-by: Tim Armstrong <2f8e34250f03a653da3dc27f7ec203eafdde80fc@cloudera.com>

cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala