Ecosyste.ms: Awesome

An open API service indexing awesome lists of open source software.

Awesome Lists | Featured Topics | Projects

https://github.com/houkx/sqlparser

func Walk(level int, visit Visit, nodes ...SQLNode)
https://github.com/houkx/sqlparser

Last synced: 7 days ago
JSON representation

func Walk(level int, visit Visit, nodes ...SQLNode)

Awesome Lists containing this project

README 

        
# fork from github.com/xwb1989/sqlparser

# NEW featrue: modify column name

	```golang

	sel := stmt.(*sqlparser.Select)

	colPrev := "mytable."

	sqlparser.Walk(0, func(level int, node sqlparser.SQLNode) (kontinue bool, err error) {

		if col, ok := node.(*sqlparser.ColName); ok {

			oName := col.Name.GetV()

			if oName == "id" {

				col.Name.SetV("_id") // Change "id" to "_id"

			} else if colPrev != "" {

				col.Name.SetV(colPrev + oName) // Add prev to columnName

			}

		}

		return true, nil

	}, sel)

	```

# sqlparser [![Build Status](https://img.shields.io/travis/xwb1989/sqlparser.svg)](https://travis-ci.org/xwb1989/sqlparser) [![Coverage](https://img.shields.io/coveralls/xwb1989/sqlparser.svg)](https://coveralls.io/github/xwb1989/sqlparser) [![Report card](https://goreportcard.com/badge/hikvision.com/esapi/sqlparser)](https://goreportcard.com/report/hikvision.com/esapi/sqlparser) [![GoDoc](https://godoc.org/hikvision.com/esapi/sqlparser?status.svg)](https://godoc.org/hikvision.com/esapi/sqlparser)



Go package for parsing MySQL SQL queries.



## Notice



The backbone of this repo is extracted from [vitessio/vitess](https://github.com/vitessio/vitess).



Inside vitessio/vitess there is a very nicely written sql parser. However as it's not a self-contained application, I created this one.

It applies the same LICENSE as vitessio/vitess.



## Usage



```go

import (

    "hikvision.com/esapi/sqlparser"

)

```



Then use:



```go

sql := "SELECT * FROM table WHERE a = 'abc'"

stmt, err := sqlparser.Parse(sql)

if err != nil {

	// Do something with the err

}



// Otherwise do something with stmt

switch stmt := stmt.(type) {

case *sqlparser.Select:

	_ = stmt

case *sqlparser.Insert:

}

```



Alternative to read many queries from a io.Reader:



```go

r := strings.NewReader("INSERT INTO table1 VALUES (1, 'a'); INSERT INTO table2 VALUES (3, 4);")



tokens := sqlparser.NewTokenizer(r)

for {

	stmt, err := sqlparser.ParseNext(tokens)

	if err == io.EOF {

		break

	}

	// Do something with stmt or err.

}

```



See [parse_test.go](https://hikvision.com/esapi/sqlparser/blob/master/parse_test.go) for more examples, or read the [godoc](https://godoc.org/hikvision.com/esapi/sqlparser).



## Porting Instructions



You only need the below if you plan to try and keep this library up to date with [vitessio/vitess](https://github.com/vitessio/vitess).



### Keeping up to date



```bash

shopt -s nullglob

VITESS=${GOPATH?}/src/vitess.io/vitess/go/

XWB1989=${GOPATH?}/src/hikvision.com/esapi/sqlparser/



# Create patches for everything that changed

LASTIMPORT=1b7879cb91f1dfe1a2dfa06fea96e951e3a7aec5

for path in ${VITESS?}/{vt/sqlparser,sqltypes,bytes2,hack}; do

	cd ${path}

	git format-patch ${LASTIMPORT?} .

done;



# Apply patches to the dependencies

cd ${XWB1989?}

git am --directory dependency -p2 ${VITESS?}/{sqltypes,bytes2,hack}/*.patch



# Apply the main patches to the repo

cd ${XWB1989?}

git am -p4 ${VITESS?}/vt/sqlparser/*.patch



# If you encounter diff failures, manually fix them with

patch -p4 < .git/rebase-apply/patch

...

git add name_of_files

git am --continue



# Cleanup

rm ${VITESS?}/{sqltypes,bytes2,hack}/*.patch ${VITESS?}/*.patch



# and Finally update the LASTIMPORT in this README.

```



### Fresh install



TODO: Change these instructions to use git to copy the files, that'll make later patching easier.



```bash

VITESS=${GOPATH?}/src/vitess.io/vitess/go/

XWB1989=${GOPATH?}/src/hikvision.com/esapi/sqlparser/



cd ${XWB1989?}



# Copy all the code

cp -pr ${VITESS?}/vt/sqlparser/ .

cp -pr ${VITESS?}/sqltypes dependency

cp -pr ${VITESS?}/bytes2 dependency

cp -pr ${VITESS?}/hack dependency



# Delete some code we haven't ported

rm dependency/sqltypes/arithmetic.go dependency/sqltypes/arithmetic_test.go dependency/sqltypes/event_token.go dependency/sqltypes/event_token_test.go dependency/sqltypes/proto3.go dependency/sqltypes/proto3_test.go dependency/sqltypes/query_response.go dependency/sqltypes/result.go dependency/sqltypes/result_test.go



# Some automated fixes



# Fix imports

sed -i '.bak' 's_vitess.io/vitess/go/vt/proto/query_hikvision.com/esapi/sqlparser/dependency/querypb_g' *.go dependency/sqltypes/*.go

sed -i '.bak' 's_vitess.io/vitess/go/_hikvision.com/esapi/sqlparser/dependency/_g' *.go dependency/sqltypes/*.go



# Copy the proto, but basically drop everything we don't want

cp -pr ${VITESS?}/vt/proto/query dependency/querypb



sed -i '.bak' 's_.*Descriptor.*__g' dependency/querypb/*.go

sed -i '.bak' 's_.*ProtoMessage.*__g' dependency/querypb/*.go



sed -i '.bak' 's/proto.CompactTextString(m)/"TODO"/g' dependency/querypb/*.go

sed -i '.bak' 's/proto.EnumName/EnumName/g' dependency/querypb/*.go



sed -i '.bak' 's/proto.Equal/reflect.DeepEqual/g' dependency/sqltypes/*.go



# Remove the error library

sed -i '.bak' 's/vterrors.Errorf([^,]*, /fmt.Errorf(/g' *.go dependency/sqltypes/*.go

sed -i '.bak' 's/vterrors.New([^,]*, /errors.New(/g' *.go dependency/sqltypes/*.go

```



### Testing



```bash

VITESS=${GOPATH?}/src/vitess.io/vitess/go/

XWB1989=${GOPATH?}/src/hikvision.com/esapi/sqlparser/



cd ${XWB1989?}



# Test, fix and repeat

go test ./...



# Finally make some diffs (for later reference)

diff -u ${VITESS?}/sqltypes/        ${XWB1989?}/dependency/sqltypes/ > ${XWB1989?}/patches/sqltypes.patch

diff -u ${VITESS?}/bytes2/          ${XWB1989?}/dependency/bytes2/   > ${XWB1989?}/patches/bytes2.patch

diff -u ${VITESS?}/vt/proto/query/  ${XWB1989?}/dependency/querypb/  > ${XWB1989?}/patches/querypb.patch

diff -u ${VITESS?}/vt/sqlparser/    ${XWB1989?}/                     > ${XWB1989?}/patches/sqlparser.patch

```