Programming VIP

Basic grammar [WITH name AS (select_expression) [, ...] ] SELECT [ALL | DISTINCT] [STRAIGHT_JOIN] expression [, expression ...] FROM table_reference [, table_reference ...] [[FULL | [LEFT | RIGHT] INNER | [LEFT | RIGHT] OUTER | [LEFT | RIGHT] SEMI | [LEFT | RIGHT] ANTI | CROSS] JOIN table_reference [ON join_equality_clauses | USING ( ...

At cdh6 Version 1 we try on cdh6 In version 1, Impala was upgraded and the function of automatically refreshing metadata was enabled. Some problems were encountered during this period. They were finally solved by checking the log, source code, Google and so on. Use this article to sort it out and give back to the community. The main reference ...

**Requirements: you want to maintain two wide tables on phoenix, one for ad hoc query, one for one day's data and one for history. The characteristic of wide table is that it is composed of multiple tables, but the arrival time of each table is inconsistent. Some tables arrive first, and some tables may arrive every other day. What you want to ...