Error to read parquet with latest parquet-go #61

tanyaofei · 2022-03-30T06:34:13Z

Create a file with python pandas

dataframe = pandas.DataFrame({
        "A": ["a", "b", "c", "d"],
        "B": [2, 3, 4, 1],
        "C": [10, 20, None, None]
    })

dataframe.to_parquet("1.parquet")

This file looks like:

Read this file

func main() {
    ctx := context.Background()
    fr, _ := local.NewLocalFileReader("1.parquet")
    df, err := imports.LoadFromParquet(ctx, fr)
    if err != nil {
        panic(err)
    }
    fmt.Println(df)
}

Got a unique name error

panic: names of series must be unique: 

goroutine 1 [running]:
github.com/rocketlaunchr/dataframe-go.NewDataFrame({0xc0001f8000, 0x3, 0xc000149a10?})
        .../rocketlaunchr/[email protected]/dataframe.go:41 +0x33c
github.com/rocketlaunchr/dataframe-go/imports.LoadFromParquet({0x1497868, 0xc000020080}, {0x1498150?, 0xc00000e798?}, {0xc0000021a0?, 0xc000149f70?, 0x1007599?})
        .../go/pkg/mod/github.com/rocketlaunchr/[email protected]/imports/parquet.go:110 +0x8ae
main.main()
        .../main.go:13 +0x78

Following the stack, I found some useful informations

All series in method imports.LoadFromParquet with empty names

goFieldNameToActual
each keys in this map with prefix "Scheme", but goName didn't, may be it's the reason why can't not find a name from this map

This's the first time I use golang to read parquet files. It is an error cause by parquet-go breaking changes or something else ?

The text was updated successfully, but these errors were encountered:

pjebs · 2022-03-30T07:00:58Z

Can you send me the file

tanyaofei · 2022-03-30T07:03:54Z

Can you send me the file
1.parquet.zip

pjebs · 2022-03-30T07:12:51Z

Can you create the DataFrame from this package, export it to paraquet and then try and import it back?

tanyaofei · 2022-03-30T07:18:29Z

Can you create the DataFrame from this package, export it to paraquet and then try and import it back?

I tried it at the first time, it seems like a error parquet file with content "PAR1"

func main() {
    df := dataframe.NewDataFrame(dataframe.NewSeriesString("A", nil, []string{"1", "2", "3"}))
    file, _ := os.Create("1.parquet")
    _ = exports.ExportToParquet(context.Background(), file, df)
}

pjebs · 2022-03-30T07:22:16Z

A Parquet file is not text based. Can you try importing the file back.

tanyaofei · 2022-03-30T07:28:13Z

A Parquet file is not text based. Can you try importing the file back.

    df := dataframe.NewDataFrame(dataframe.NewSeriesString("A", nil, []string{"1", "2", "3"}))
    file, _ := os.Create("1.parquet")
    _ = exports.ExportToParquet(context.Background(), file, df)

    fr, _ := local.NewLocalFileReader("1.parquet")
    df, err := imports.LoadFromParquet(context.Background(), fr)
    if err != nil {
        panic(err)
    }
    fmt.Println(df)

panic: seek 1.parquet: invalid argument

goroutine 1 [running]:
main.main()
        .../main.go:21 +0x465
Exiting.

Error at imports/parquet.go, line 40: pr, err := reader.NewParquetReader(src, nil, int64(runtime.NumCPU()))

tanyaofei · 2022-03-30T07:32:39Z

A Parquet file is not text based. Can you try importing the file back.

My parquet-go version is v1.6.2: github.com/xitongsys/parquet-go v1.6.2

pjebs · 2022-03-30T07:36:39Z

I tried opening your file and it worked:

package main

import	"github.com/xitongsys/parquet-go-source/local"
import	"github.com/rocketlaunchr/dataframe-go/imports"
import "fmt"
import "context"

var ctx = context.Background()

func main() {
	fr, _ := local.NewLocalFileReader("1.parquet")
	defer fr.Close()

	df, err := imports.LoadFromParquet(ctx, fr)
	if err != nil {
		panic(err)
	}

	fmt.Println(df)
}

OUTPUT:

+-----+--------+-------+---------+
|     |   A    |   B   |    C    |
+-----+--------+-------+---------+
| 0:  |   a    |   2   |   10    |
| 1:  |   b    |   3   |   20    |
| 2:  |   c    |   4   |   NaN   |
| 3:  |   d    |   1   |   NaN   |
+-----+--------+-------+---------+
| 4X3 | STRING | INT64 | FLOAT64 |
+-----+--------+-------+---------+

tanyaofei · 2022-03-30T07:38:30Z

I tried opening your file and it worked:

package main

import	"github.com/xitongsys/parquet-go-source/local"
import	"github.com/rocketlaunchr/dataframe-go/imports"
import "fmt"
import "context"

var ctx = context.Background()

func main() {
	fr, _ := local.NewLocalFileReader("1.parquet")
	defer fr.Close()

	df, err := imports.LoadFromParquet(ctx, fr)
	if err != nil {
		panic(err)
	}

	fmt.Println(df)
}

OUTPUT:

+-----+--------+-------+---------+
|     |   A    |   B   |    C    |
+-----+--------+-------+---------+
| 0:  |   a    |   2   |   10    |
| 1:  |   b    |   3   |   20    |
| 2:  |   c    |   4   |   NaN   |
| 3:  |   d    |   1   |   NaN   |
+-----+--------+-------+---------+
| 4X3 | STRING | INT64 | FLOAT64 |
+-----+--------+-------+---------+

Can you tell me your parquet-go version ?

pjebs · 2022-03-30T07:39:53Z

module main

go 1.18

require (
	github.com/rocketlaunchr/dataframe-go v0.0.0-00010101000000-000000000000
	github.com/xitongsys/parquet-go-source v0.0.0-20200509081216-8db33acb0acf
)

require (
	github.com/apache/thrift v0.0.0-20181112125854-24918abba929 // indirect
	github.com/goccy/go-json v0.7.6 // indirect
	github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db // indirect
	github.com/google/go-cmp v0.4.0 // indirect
	github.com/guptarohit/asciigraph v0.5.1 // indirect
	github.com/juju/clock v0.0.0-20190205081909-9c5c9712527c // indirect
	github.com/juju/errors v0.0.0-20200330140219-3fe23663418f // indirect
	github.com/juju/loggo v0.0.0-20200526014432-9ce3a2e09b5e // indirect
	github.com/juju/utils/v2 v2.0.0-20200923005554-4646bfea2ef1 // indirect
	github.com/klauspost/compress v1.9.7 // indirect
	github.com/mattn/go-runewidth v0.0.7 // indirect
	github.com/olekukonko/tablewriter v0.0.4 // indirect
	github.com/rocketlaunchr/mysql-go v1.1.3 // indirect
	github.com/xitongsys/parquet-go v1.5.2 // indirect
	golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a // indirect
	golang.org/x/exp v0.0.0-20200331195152-e8c3332aa8e5 // indirect
	golang.org/x/net v0.0.0-20200904194848-62affa334b73 // indirect
	golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a // indirect
	gopkg.in/yaml.v2 v2.3.0 // indirect
)

tanyaofei · 2022-03-30T07:45:40Z

I use github.com/apache/thrift v0.0.0-20181112125854-24918abba929, github.com/xitongsys/parquet-go v1.5.2 and it works.

pjebs · 2022-03-30T07:45:41Z

In the release notes:

[v1.6.0](https://github.com/xitongsys/parquet-go/releases/tag/v1.6.0)
Big changes in the type. Not compatiable with before.

I may need to update package to use 1.6+ instead of 1.5.

No idea why it is not using v1.5 for you since it's registered in the go.mod file.

tanyaofei · 2022-03-30T07:50:37Z

In the release notes:
[v1.6.0](https://github.com/xitongsys/parquet-go/releases/tag/v1.6.0)
Big changes in the type. Not compatiable with before.
I may need to update package to use 1.6+ instead of 1.5.

No idea why it is not using v1.5 for you since it's registered in the go.mod file.

v1.5 works find, may be i installed parquet-go before installed dataframe-go, not sure about it.

tanyaofei · 2022-03-30T07:52:00Z

It seems the problem solved, I should close this issue

pjebs · 2022-03-30T07:52:26Z

Maybe you directly imported "github.com/rocketlaunchr/dataframe-go/imports" without importing "github.com/rocketlaunchr/dataframe-go". Since there is no go.mod file inside github.com/rocketlaunchr/dataframe-go/imports directory, it just downloaded and used the latest version of parquet-go

tanyaofei · 2022-03-30T07:59:36Z

Maybe you directly imported "github.com/rocketlaunchr/dataframe-go/imports" without importing "github.com/rocketlaunchr/dataframe-go". Since there is no go.mod file inside github.com/rocketlaunchr/dataframe-go/imports directory, it just downloaded and used the latest version of parquet-go

Here is my shell records

➜  go get -u github.com/rocketlaunchr/dataframe-go
go: downloading github.com/rocketlaunchr/dataframe-go v0.0.0-20211025052708-a1030444159b
go: downloading golang.org/x/exp v0.0.0-20200331195152-e8c3332aa8e5
go: downloading github.com/google/go-cmp v0.4.0
go: downloading github.com/guptarohit/asciigraph v0.5.1
go: downloading github.com/olekukonko/tablewriter v0.0.4
go: downloading golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a
go: downloading github.com/olekukonko/tablewriter v0.0.5
go: downloading github.com/google/go-cmp v0.5.7
go: downloading github.com/mattn/go-runewidth v0.0.7
go: downloading github.com/mattn/go-runewidth v0.0.13
go: downloading golang.org/x/exp v0.0.0-20220328175248-053ad81199eb
go: downloading github.com/guptarohit/asciigraph v0.5.3
go: downloading github.com/rivo/uniseg v0.2.0
go: added github.com/google/go-cmp v0.5.7
go: added github.com/guptarohit/asciigraph v0.5.3
go: added github.com/mattn/go-runewidth v0.0.13
go: added github.com/olekukonko/tablewriter v0.0.5
go: added github.com/rivo/uniseg v0.2.0
go: added github.com/rocketlaunchr/dataframe-go v0.0.0-20211025052708-a1030444159b
go: added golang.org/x/exp v0.0.0-20220328175248-053ad81199eb
go: added golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
➜  go get -u github.com/xitongsys/parquet-go/parquet                                     
go: downloading github.com/apache/thrift v0.16.0
go: upgraded github.com/apache/thrift v0.0.0-20181112125854-24918abba929 => v0.16.0
go: upgraded github.com/xitongsys/parquet-go v1.5.2 => v1.6.2
➜  go get -u github.com/xitongsys/parquet-go-source                                       
go: downloading github.com/xitongsys/parquet-go-source v0.0.0-20220315005136-aec0fe3e777c
go: upgraded github.com/xitongsys/parquet-go-source v0.0.0-20200817004010-026bad9b25d0 => v0.0.0-20220315005136-aec0fe3e777c

pjebs · 2022-03-30T08:31:06Z

You shouldn't have done the last 2 go gets since they don't have a go.mod file so it just assumed the latest version hence: go: upgraded github.com/xitongsys/parquet-go v1.5.2 => v1.6.2

pjebs · 2022-03-30T08:31:43Z

From Go's point of view, when you do that, it's an unrelated package.

tanyaofei · 2022-03-30T08:33:12Z

You shouldn't have done the last 2 go gets since they don't have a go.mod file so it just assumed the latest version hence: go: upgraded github.com/xitongsys/parquet-go v1.5.2 => v1.6.2

Get it, thanks a lot

chippyash · 2022-06-04T10:08:45Z

Hi - when is this lib going to be upgraded to use >= V1.6.2 of parquet-go please? having to fix on v1.5.4 just broke all the tagging I was using which assumed V1.6.2 :-(

pjebs · 2022-06-04T10:28:35Z

There is a backward-incompatible change in v1.6.2. Therefore I will need to explore it more deeply.

This package's go.mod is set to github.com/xitongsys/parquet-go v1.5.2 so it should work for you provided you don't try and indepdently go get the "github.com/rocketlaunchr/dataframe-go/imports" package.

Let the main package dictate the dependencies for the sub-packages.

tanyaofei closed this as completed Mar 30, 2022

pjebs reopened this Mar 30, 2022

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Error to read parquet with latest parquet-go #61

Error to read parquet with latest parquet-go #61

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Error to read parquet with latest parquet-go #61

Error to read parquet with latest parquet-go #61

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