这是indexloc提供的服务，不要输入任何密码
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minor, fix tiny syntax error. #85

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Nov 1, 2018
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minor, fix tiny syntax error. #85

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10 changes: 4 additions & 6 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -124,19 +124,17 @@ spark.index.exists.parquet("temp/codes.parquet")
// example uses filters on both columns, though any filters can be used,
// e.g. only on id or code
// Metastore will cache index catalog to reduce time for subsequent calls
val df = spark.index.parquet("temp/codes.parquet").
filter($"id" === 123 && $"code" === "123")
df.collect
spark.index.parquet("temp/codes.parquet").
filter($"id" === 123 && $"code" === "123").collect

// Delete index in metastore, also invalidates cache
// no-op if there is such index does not exist
// (does NOT delete original table)
spark.index.delete.parquet("temp/codes.parquet")

// You can compare performance with this
val df = spark.read.parquet("temp/codes.parquet").
filter($"id" === 123 && $"code" === "123")
df.collect
spark.read.parquet("temp/codes.parquet").
filter($"id" === 123 && $"code" === "123").collect
```

### Java API
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