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Add description about table name/alias specifying for read_from_storage hint (#6861) #6985

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Aug 26, 2021
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Add description about table name/alias specifying for read_from_storage hint (#6861) #6985

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Add description about table name/alias specifying for read_from_stora…
zanmato1984 Aug 13, 2021
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Update optimizer-hints.md
TomShawn Aug 26, 2021
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2 changes: 1 addition & 1 deletion optimizer-hints.md
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Expand Up @@ -189,7 +189,7 @@ SELECT /*+ AGG_TO_COP() */ sum(t1.a) FROM t t1;

### READ_FROM_STORAGE(TIFLASH[t1_name [, tl_name ...]], TIKV[t2_name [, tl_name ...]])

`READ_FROM_STORAGE(TIFLASH[t1_name [, tl_name ...]], TIKV[t2_name [, tl_name ...]])` 提示优化器从指定的存储引擎来读取指定的表，目前支持的存储引擎参数有 `TIKV` 和 `TIFLASH`。例如：
`READ_FROM_STORAGE(TIFLASH[t1_name [, tl_name ...]], TIKV[t2_name [, tl_name ...]])` 提示优化器从指定的存储引擎来读取指定的表，目前支持的存储引擎参数有 `TIKV` 和 `TIFLASH`。如果为表指定了别名，就只能使用表的别名作为 `READ_FROM_STORAGE()` 的参数；如果没有指定别名，则用表的本名作为其参数。例如：

{{< copyable "sql" >}}

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