Could you please show your SQL of the CREATE TABLE/INDEX
Jaanai Zhang
Best regards!
Batyrshin Alexander <0x62...@gmail.com> 于2018年12月23日周日 下午9:38写道：
> Examples:
>
> 1. Ignoring indexes if "*" used for select even index include all columns
> from source table
>
> 0: jdbc:phoenix:127.0.0.1> explain select * from table where "p" =
> '123123123';
>
> +---+-+++
> | PLAN
> | EST_BYTES_READ | EST_ROWS_READ |
> EST_INFO_TS |
>
> +---+-+++
> | CLIENT 1608-CHUNK 237983037 ROWS 160746749821 BYTES PARALLEL 30-WAY FULL
> SCAN OVER table | 160746749821| 237983037 | 1545484493647 |
> | SERVER FILTER BY d."p" = '123123123'
> | 160746749821| 237983037 | 1545484493647 |
> | CLIENT MERGE SORT
> | 160746749821| 237983037 |
> 1545484493647 |
>
> +---+-+++
> 3 rows selected (0.05 seconds)
>
>
> 2. Indexes used if only 1 column selected
>
> 0: jdbc:phoenix:127.0.0.1> explain select "c" from table where "p" =
> '123123123';
>
> +-+-+++
> |
> PLAN
>| EST_BYTES_READ | EST_ROWS_READ | EST_INFO_TS |
>
> +-+-+++
> | CLIENT 30-CHUNK 3569628 ROWS 3145729398 BYTES PARALLEL 30-WAY RANGE SCAN
> OVER table_idx_p [0,'123123123'] - [29,'123123123'] | 3145729398 |
> 3569628| 1545484508039 |
> | SERVER FILTER BY FIRST KEY ONLY
>
>| 3145729398 | 3569628| 1545484508039 |
> | CLIENT MERGE SORT
>
>| 3145729398 | 3569628| 1545484508039 |
>
> +-+-+++
> 3 rows selected (0.038 seconds)
>
>
> 3.
>
> 0: jdbc:phoenix:127.0.0.1> explain select /*+ INDEX(table table_idx_p) */
> * from table where "p" = '123123123';
>
> +-+-+++
> |
> PLAN
>| EST_BYTES_READ | EST_ROWS_READ | EST_INFO_TS |
>
> +-+-+++
> | CLIENT 1608-CHUNK 237983037 ROWS 160746749821 BYTES PARALLEL 30-WAY FULL
> SCAN OVER table
> | 3145729398 | 3569628| 1545484508039 |
> | CLIENT MERGE SORT
>
>| 3145729398 | 3569628| 1545484508039 |
> | SKIP-SCAN-JOIN TABLE 0
>
> | 3145729398 | 3569628| 1545484508039
> |
> | CLIENT 30-CHUNK 3569628 ROWS 3145729398 BYTES PARALLEL 30-WAY
> RANGE SCAN OVER table_idx_p [0,'123123123'] - [29,'123123123'] |
> 3145729398 | 3569628| 1545484508039 |
> | SERVER FILTER BY FIRST KEY ONLY
>
>| 3145729398 | 3569628| 1545484508039 |
> | CLIENT MERGE SORT
>
>| 3145729398 | 3569628| 1545484508039 |
> | DYNAMIC SERVER FILTER BY "table.c" IN ($35.$37)
>
>| 3145729398 | 3569628| 1545484508039 |
>
> +-+-+++
> 7 rows selected (0.12 seconds)
>
>
>
