re-factor Hive grammar to be more human readable
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Key: HIVE-94
URL: https://issues.apache.org/jira/browse/HIVE-94
Project: Hadoop Hive
Issue Type: Improvement
Components: Documentation, Query Processor
Reporter: Pete Wyckoff
Hive.g grammar specification could be re-factored to look more friendly.
MySQL's select statement looks like this on the docs page and presumably, their
grammar is similar.
{noformat}
SELECT
[ALL | DISTINCT | DISTINCTROW ]
[HIGH_PRIORITY]
[STRAIGHT_JOIN]
[SQL_SMALL_RESULT] [SQL_BIG_RESULT] [SQL_BUFFER_RESULT]
[SQL_CACHE | SQL_NO_CACHE] [SQL_CALC_FOUND_ROWS]
select_expr, ...
[FROM table_references
[WHERE where_condition]
[GROUP BY {col_name | expr | position}
[ASC | DESC], ... [WITH ROLLUP]]
[HAVING where_condition]
[ORDER BY {col_name | expr | position}
[ASC | DESC], ...]
[LIMIT {[offset,] row_count | row_count OFFSET offset}]
[PROCEDURE procedure_name(argument_list)]
[INTO OUTFILE 'file_name' export_options
| INTO DUMPFILE 'file_name'
| INTO var_name [, var_name]]
[FOR UPDATE | LOCK IN SHARE MODE]]
{noformat}
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