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TDengine
未验证 提交 031d3f57 编写于 作者: P plum-lihui 提交者： GitHub
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Merge pull request #1437 from sangshuduo/change-driver-go-connector-to-submodule 

[TD-45] change driver-go to submodule
上级 cec86924 9f235a12
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Showing with 5 addition and 1994 deletion
.gitmodules 0 → 100644
浏览文件 @ 031d3f57
[submodule "src/connector/go"]
path = src/connector/go
url = https://github.com/taosdata/driver-go
documentation/webdocs/markdowndocs/Connector.md
浏览文件 @ 031d3f57
......@@ -740,7 +740,7 @@ The return value is like:
## Go Connector
TDengine also provides a Go client package named _taosSql_ for users to access TDengine with Go. The package is in _/usr/local/taos/connector/go/src/taosSql_ by default if you installed TDengine. Users can copy the directory _/usr/local/taos/connector/go/src/taosSql_ to the _src_ directory of your project and import the package in the source code for use.
TDengine also provides a Go client package named _taosSql_ for users to access TDengine with Go. The package is in _/usr/local/taos/connector/go/driver-go/taosSql_ by default if you installed TDengine. Users can copy the directory _/usr/local/taos/connector/go/driver-go/taosSql_ to the _src_ directory of your project and import the package in the source code for use.
```Go
import (
......
go @ 8c58c512
Subproject commit 8c58c512b6acda8bcdfa48fdc7140227b5221766
src/connector/go/src/taosSql/connection.go 已删除 100755 → 0
浏览文件 @ cec86924
/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package taosSql
import "C"
import (
"context"
"errors"
"database/sql/driver"
"unsafe"
"strconv"
"strings"
"time"
)
type taosConn struct {
taos unsafe.Pointer
affectedRows int
insertId int
cfg *config
status statusFlag
parseTime bool
reset bool // set when the Go SQL package calls ResetSession
}
type taosSqlResult struct {
affectedRows int64
insertId int64
}
func (res *taosSqlResult) LastInsertId() (int64, error) {
return res.insertId, nil
}
func (res *taosSqlResult) RowsAffected() (int64, error) {
return res.affectedRows, nil
}
func (mc *taosConn) Begin() (driver.Tx, error) {
taosLog.Println("taosSql not support transaction")
return nil, errors.New("taosSql not support transaction")
}
func (mc *taosConn) Close() (err error) {
if mc.taos == nil {
return errConnNoExist
}
mc.taos_close()
return nil
}
func (mc *taosConn) Prepare(query string) (driver.Stmt, error) {
if mc.taos == nil {
return nil, errInvalidConn
}
stmt := &taosSqlStmt{
mc: mc,
pSql: query,
}
// find ? count and save to stmt.paramCount
stmt.paramCount = strings.Count(query, "?")
//fmt.Printf("prepare alloc stmt:%p, sql:%s\n", stmt, query)
taosLog.Printf("prepare alloc stmt:%p, sql:%s\n", stmt, query)
return stmt, nil
}
func (mc *taosConn) interpolateParams(query string, args []driver.Value) (string, error) {
// Number of ? should be same to len(args)
if strings.Count(query, "?") != len(args) {
return "", driver.ErrSkip
}
buf := make([]byte, defaultBufSize)
buf = buf[:0] // clear buf
argPos := 0
for i := 0; i < len(query); i++ {
q := strings.IndexByte(query[i:], '?')
if q == -1 {
buf = append(buf, query[i:]...)
break
}
buf = append(buf, query[i:i+q]...)
i += q
arg := args[argPos]
argPos++
if arg == nil {
buf = append(buf, "NULL"...)
continue
}
switch v := arg.(type) {
case int64:
buf = strconv.AppendInt(buf, v, 10)
case uint64:
// Handle uint64 explicitly because our custom ConvertValue emits unsigned values
buf = strconv.AppendUint(buf, v, 10)
case float64:
buf = strconv.AppendFloat(buf, v, 'g', -1, 64)
case bool:
if v {
buf = append(buf, '1')
} else {
buf = append(buf, '0')
}
case time.Time:
if v.IsZero() {
buf = append(buf, "'0000-00-00'"...)
} else {
v := v.In(mc.cfg.loc)
v = v.Add(time.Nanosecond * 500) // To round under microsecond
year := v.Year()
year100 := year / 100
year1 := year % 100
month := v.Month()
day := v.Day()
hour := v.Hour()
minute := v.Minute()
second := v.Second()
micro := v.Nanosecond() / 1000
buf = append(buf, []byte{
'\'',
digits10[year100], digits01[year100],
digits10[year1], digits01[year1],
'-',
digits10[month], digits01[month],
'-',
digits10[day], digits01[day],
' ',
digits10[hour], digits01[hour],
':',
digits10[minute], digits01[minute],
':',
digits10[second], digits01[second],
}...)
if micro != 0 {
micro10000 := micro / 10000
micro100 := micro / 100 % 100
micro1 := micro % 100
buf = append(buf, []byte{
'.',
digits10[micro10000], digits01[micro10000],
digits10[micro100], digits01[micro100],
digits10[micro1], digits01[micro1],
}...)
}
buf = append(buf, '\'')
}
case []byte:
if v == nil {
buf = append(buf, "NULL"...)
} else {
buf = append(buf, "_binary'"...)
if mc.status&statusNoBackslashEscapes == 0 {
buf = escapeBytesBackslash(buf, v)
} else {
buf = escapeBytesQuotes(buf, v)
}
buf = append(buf, '\'')
}
case string:
//buf = append(buf, '\'')
if mc.status&statusNoBackslashEscapes == 0 {
buf = escapeStringBackslash(buf, v)
} else {
buf = escapeStringQuotes(buf, v)
}
//buf = append(buf, '\'')
default:
return "", driver.ErrSkip
}
//if len(buf)+4 > mc.maxAllowedPacket {
if len(buf)+4 > maxTaosSqlLen {
return "", driver.ErrSkip
}
}
if argPos != len(args) {
return "", driver.ErrSkip
}
return string(buf), nil
}
func (mc *taosConn) Exec(query string, args []driver.Value) (driver.Result, error) {
if mc.taos == nil {
return nil, driver.ErrBadConn
}
if len(args) != 0 {
if !mc.cfg.interpolateParams {
return nil, driver.ErrSkip
}
// try to interpolate the parameters to save extra roundtrips for preparing and closing a statement
prepared, err := mc.interpolateParams(query, args)
if err != nil {
return nil, err
}
query = prepared
}
mc.affectedRows = 0
mc.insertId = 0
_, err := mc.taosQuery(query)
if err == nil {
return &taosSqlResult{
affectedRows: int64(mc.affectedRows),
insertId: int64(mc.insertId),
}, err
}
return nil, err
}
func (mc *taosConn) Query(query string, args []driver.Value) (driver.Rows, error) {
return mc.query(query, args)
}
func (mc *taosConn) query(query string, args []driver.Value) (*textRows, error) {
if mc.taos == nil {
return nil, driver.ErrBadConn
}
if len(args) != 0 {
if !mc.cfg.interpolateParams {
return nil, driver.ErrSkip
}
// try client-side prepare to reduce roundtrip
prepared, err := mc.interpolateParams(query, args)
if err != nil {
return nil, err
}
query = prepared
}
num_fields, err := mc.taosQuery(query)
if err == nil {
// Read Result
rows := new(textRows)
rows.mc = mc
// Columns field
rows.rs.columns, err = mc.readColumns(num_fields)
return rows, err
}
return nil, err
}
// Ping implements driver.Pinger interface
func (mc *taosConn) Ping(ctx context.Context) (err error) {
if mc.taos != nil {
return nil
}
return errInvalidConn
}
// BeginTx implements driver.ConnBeginTx interface
func (mc *taosConn) BeginTx(ctx context.Context, opts driver.TxOptions) (driver.Tx, error) {
taosLog.Println("taosSql not support transaction")
return nil, errors.New("taosSql not support transaction")
}
func (mc *taosConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) {
if mc.taos == nil {
return nil, errInvalidConn
}
dargs, err := namedValueToValue(args)
if err != nil {
return nil, err
}
rows, err := mc.query(query, dargs)
if err != nil {
return nil, err
}
return rows, err
}
func (mc *taosConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) {
if mc.taos == nil {
return nil, errInvalidConn
}
dargs, err := namedValueToValue(args)
if err != nil {
return nil, err
}
return mc.Exec(query, dargs)
}
func (mc *taosConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) {
if mc.taos == nil {
return nil, errInvalidConn
}
stmt, err := mc.Prepare(query)
if err != nil {
return nil, err
}
return stmt, nil
}
func (stmt *taosSqlStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) {
if stmt.mc == nil {
return nil, errInvalidConn
}
dargs, err := namedValueToValue(args)
if err != nil {
return nil, err
}
rows, err := stmt.query(dargs)
if err != nil {
return nil, err
}
return rows, err
}
func (stmt *taosSqlStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) {
if stmt.mc == nil {
return nil, errInvalidConn
}
dargs, err := namedValueToValue(args)
if err != nil {
return nil, err
}
return stmt.Exec(dargs)
}
func (mc *taosConn) CheckNamedValue(nv *driver.NamedValue) (err error) {
nv.Value, err = converter{}.ConvertValue(nv.Value)
return
}
// ResetSession implements driver.SessionResetter.
// (From Go 1.10)
func (mc *taosConn) ResetSession(ctx context.Context) error {
if mc.taos == nil {
return driver.ErrBadConn
}
mc.reset = true
return nil
}
src/connector/go/src/taosSql/connector.go 已删除 100755 → 0
浏览文件 @ cec86924
/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package taosSql
import (
"context"
"database/sql/driver"
)
type connector struct {
cfg *config
}
// Connect implements driver.Connector interface.
// Connect returns a connection to the database.
func (c *connector) Connect(ctx context.Context) (driver.Conn, error) {
var err error
// New taosConn
mc := &taosConn{
cfg: c.cfg,
parseTime: c.cfg.parseTime,
}
// Connect to Server
mc.taos, err = mc.taosConnect(mc.cfg.addr, mc.cfg.user, mc.cfg.passwd, mc.cfg.dbName, mc.cfg.port)
if err != nil {
return nil, err
}
return mc, nil
}
// Driver implements driver.Connector interface.
// Driver returns &taosSQLDriver{}.
func (c *connector) Driver() driver.Driver {
return &taosSQLDriver{}
}
src/connector/go/src/taosSql/const.go 已删除 100755 → 0
浏览文件 @ cec86924
/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package taosSql
const (
timeFormat = "2006-01-02 15:04:05"
maxTaosSqlLen = 65380
defaultBufSize = maxTaosSqlLen + 32
)
type fieldType byte
type fieldFlag uint16
const (
flagNotNULL fieldFlag = 1 << iota
)
type statusFlag uint16
const (
statusInTrans statusFlag = 1 << iota
statusInAutocommit
statusReserved // Not in documentation
statusMoreResultsExists
statusNoGoodIndexUsed
statusNoIndexUsed
statusCursorExists
statusLastRowSent
statusDbDropped
statusNoBackslashEscapes
statusMetadataChanged
statusQueryWasSlow
statusPsOutParams
statusInTransReadonly
statusSessionStateChanged
)
src/connector/go/src/taosSql/driver.go 已删除 100755 → 0
浏览文件 @ cec86924
/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package taosSql
import (
"context"
"database/sql"
"database/sql/driver"
)
// taosSqlDriver is exported to make the driver directly accessible.
// In general the driver is used via the database/sql package.
type taosSQLDriver struct{}
// Open new Connection.
// the DSN string is formatted
func (d taosSQLDriver) Open(dsn string) (driver.Conn, error) {
cfg, err := parseDSN(dsn)
if err != nil {
return nil, err
}
c := &connector{
cfg: cfg,
}
return c.Connect(context.Background())
}
func init() {
sql.Register("taosSql", &taosSQLDriver{})
taosLogInit()
}
src/connector/go/src/taosSql/dsn.go 已删除 100755 → 0
浏览文件 @ cec86924
/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package taosSql
import (
"errors"
"net/url"
"strconv"
"strings"
"time"
)
var (
errInvalidDSNUnescaped = errors.New("invalid DSN: did you forget to escape a param value?")
errInvalidDSNAddr = errors.New("invalid DSN: network address not terminated (missing closing brace)")
errInvalidDSNPort = errors.New("invalid DSN: network port is not a valid number")
errInvalidDSNNoSlash = errors.New("invalid DSN: missing the slash separating the database name")
)
// Config is a configuration parsed from a DSN string.
// If a new Config is created instead of being parsed from a DSN string,
// the NewConfig function should be used, which sets default values.
type config struct {
user string // Username
passwd string // Password (requires User)
net string // Network type
addr string // Network address (requires Net)
port int
dbName string // Database name
params map[string]string // Connection parameters
loc *time.Location // Location for time.Time values
columnsWithAlias bool // Prepend table alias to column names
interpolateParams bool // Interpolate placeholders into query string
parseTime bool // Parse time values to time.Time
}
// NewConfig creates a new Config and sets default values.
func newConfig() *config {
return &config{
loc: time.UTC,
interpolateParams: true,
parseTime: true,
}
}
// ParseDSN parses the DSN string to a Config
func parseDSN(dsn string) (cfg *config, err error) {
taosLog.Println("input dsn:", dsn)
// New config with some default values
cfg = newConfig()
// [user[:password]@][net[(addr)]]/dbname[?param1=value1&paramN=valueN]
// Find the last '/' (since the password or the net addr might contain a '/')
foundSlash := false
for i := len(dsn) - 1; i >= 0; i-- {
if dsn[i] == '/' {
foundSlash = true
var j, k int
// left part is empty if i <= 0
if i > 0 {
// [username[:password]@][protocol[(address)]]
// Find the last '@' in dsn[:i]
for j = i; j >= 0; j-- {
if dsn[j] == '@' {
// username[:password]
// Find the first ':' in dsn[:j]
for k = 0; k < j; k++ {
if dsn[k] == ':' {
cfg.passwd = dsn[k+1 : j]
break
}
}
cfg.user = dsn[:k]
break
}
}
// [protocol[(address)]]
// Find the first '(' in dsn[j+1:i]
for k = j + 1; k < i; k++ {
if dsn[k] == '(' {
// dsn[i-1] must be == ')' if an address is specified
if dsn[i-1] != ')' {
if strings.ContainsRune(dsn[k+1:i], ')') {
return nil, errInvalidDSNUnescaped
}
return nil, errInvalidDSNAddr
}
strs := strings.Split(dsn[k+1:i-1], ":")
if len(strs) == 1 {
return nil, errInvalidDSNAddr
}
cfg.addr = strs[0]
cfg.port, err = strconv.Atoi(strs[1])
if err != nil {
return nil, errInvalidDSNPort
}
break
}
}
cfg.net = dsn[j+1 : k]
}
// dbname[?param1=value1&...&paramN=valueN]
// Find the first '?' in dsn[i+1:]
for j = i + 1; j < len(dsn); j++ {
if dsn[j] == '?' {
if err = parseDSNParams(cfg, dsn[j+1:]); err != nil {
return
}
break
}
}
cfg.dbName = dsn[i+1 : j]
break
}
}
if !foundSlash && len(dsn) > 0 {
return nil, errInvalidDSNNoSlash
}
taosLog.Printf("cfg info: %+v", cfg)
return
}
// parseDSNParams parses the DSN "query string"
// Values must be url.QueryEscape'ed
func parseDSNParams(cfg *config, params string) (err error) {
for _, v := range strings.Split(params, "&") {
param := strings.SplitN(v, "=", 2)
if len(param) != 2 {
continue
}
// cfg params
switch value := param[1]; param[0] {
case "columnsWithAlias":
var isBool bool
cfg.columnsWithAlias, isBool = readBool(value)
if !isBool {
return errors.New("invalid bool value: " + value)
}
// Enable client side placeholder substitution
case "interpolateParams":
var isBool bool
cfg.interpolateParams, isBool = readBool(value)
if !isBool {
return errors.New("invalid bool value: " + value)
}
// Time Location
case "loc":
if value, err = url.QueryUnescape(value); err != nil {
return
}
cfg.loc, err = time.LoadLocation(value)
if err != nil {
return
}
// time.Time parsing
case "parseTime":
var isBool bool
cfg.parseTime, isBool = readBool(value)
if !isBool {
return errors.New("invalid bool value: " + value)
}
default:
// lazy init
if cfg.params == nil {
cfg.params = make(map[string]string)
}
if cfg.params[param[0]], err = url.QueryUnescape(value); err != nil {
return
}
}
}
return
}
src/connector/go/src/taosSql/result.go 已删除 100755 → 0
浏览文件 @ cec86924
/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package taosSql
/*
#cgo CFLAGS : -I/usr/include
#cgo LDFLAGS: -L/usr/lib -ltaos
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <taos.h>
*/
import "C"
import (
"database/sql/driver"
"errors"
"fmt"
"io"
"strconv"
"time"
"unsafe"
)
/******************************************************************************
* Result *
******************************************************************************/
// Read Packets as Field Packets until EOF-Packet or an Error appears
func (mc *taosConn) readColumns(count int) ([]taosSqlField, error) {
columns := make([]taosSqlField, count)
var result unsafe.Pointer
result = C.taos_use_result(mc.taos)
if result == nil {
return nil, errors.New("invalid result")
}
pFields := (*C.struct_taosField)(C.taos_fetch_fields(result))
// TODO: Optimized rewriting !!!!
fields := (*[1 << 30]C.struct_taosField)(unsafe.Pointer(pFields))
for i := 0; i < count; i++ {
//columns[i].tableName = ms.taos.
//fmt.Println(reflect.TypeOf(fields[i].name))
var charray []byte
for j := range fields[i].name {
//fmt.Println("fields[i].name[j]: ", fields[i].name[j])
if fields[i].name[j] != 0 {
charray = append(charray, byte(fields[i].name[j]))
} else {
break
}
}
columns[i].name = string(charray)
columns[i].length = (uint32)(fields[i].bytes)
columns[i].fieldType = fieldType(fields[i]._type)
columns[i].flags = 0
// columns[i].decimals = 0
//columns[i].charSet = 0
}
return columns, nil
}
func (rows *taosSqlRows) readRow(dest []driver.Value) error {
mc := rows.mc
if rows.rs.done || mc == nil {
return io.EOF
}
var result unsafe.Pointer
result = C.taos_use_result(mc.taos)
if result == nil {
return errors.New(C.GoString(C.taos_errstr(mc.taos)))
}
//var row *unsafe.Pointer
row := C.taos_fetch_row(result)
if row == nil {
rows.rs.done = true
C.taos_free_result(result)
rows.mc = nil
return io.EOF
}
// because sizeof(void*) == sizeof(int*) == 8
// notes: sizeof(int) == 8 in go, but sizeof(int) == 4 in C.
for i := range dest {
currentRow := (unsafe.Pointer)(uintptr(*((*int)(unsafe.Pointer(uintptr(unsafe.Pointer(row)) + uintptr(i)*unsafe.Sizeof(int(0)))))))
if currentRow == nil {
dest[i] = nil
continue
}
switch rows.rs.columns[i].fieldType {
case C.TSDB_DATA_TYPE_BOOL:
if (*((*byte)(currentRow))) != 0 {
dest[i] = true
} else {
dest[i] = false
}
break
case C.TSDB_DATA_TYPE_TINYINT:
dest[i] = (int)(*((*byte)(currentRow)))
break
case C.TSDB_DATA_TYPE_SMALLINT:
dest[i] = (int16)(*((*int16)(currentRow)))
break
case C.TSDB_DATA_TYPE_INT:
dest[i] = (int)(*((*int32)(currentRow))) // notes int32 of go <----> int of C
break
case C.TSDB_DATA_TYPE_BIGINT:
dest[i] = (int64)(*((*int64)(currentRow)))
break
case C.TSDB_DATA_TYPE_FLOAT:
dest[i] = (*((*float32)(currentRow)))
break
case C.TSDB_DATA_TYPE_DOUBLE:
dest[i] = (*((*float64)(currentRow)))
break
case C.TSDB_DATA_TYPE_BINARY, C.TSDB_DATA_TYPE_NCHAR:
charLen := rows.rs.columns[i].length
var index uint32
binaryVal := make([]byte, charLen)
for index = 0; index < charLen; index++ {
binaryVal[index] = *((*byte)(unsafe.Pointer(uintptr(currentRow) + uintptr(index))))
}
dest[i] = string(binaryVal[:])
break
case C.TSDB_DATA_TYPE_TIMESTAMP:
if mc.cfg.parseTime == true {
timestamp := (int64)(*((*int64)(currentRow)))
dest[i] = timestampConvertToString(timestamp, int(C.taos_result_precision(result)))
} else {
dest[i] = (int64)(*((*int64)(currentRow)))
}
break
default:
fmt.Println("default fieldType: set dest[] to nil")
dest[i] = nil
break
}
}
return nil
}
// Read result as Field format until all rows or an Error appears
// call this func in conn mode
func (rows *textRows) readRow(dest []driver.Value) error {
return rows.taosSqlRows.readRow(dest)
}
// call thsi func in stmt mode
func (rows *binaryRows) readRow(dest []driver.Value) error {
return rows.taosSqlRows.readRow(dest)
}
func timestampConvertToString(timestamp int64, precision int) string {
var decimal, sVal, nsVal int64
if precision == 0 {
decimal = timestamp % 1000
sVal = timestamp / 1000
nsVal = decimal * 1000
} else {
decimal = timestamp % 1000000
sVal = timestamp / 1000000
nsVal = decimal * 1000000
}
date_time := time.Unix(sVal, nsVal)
//const base_format = "2006-01-02 15:04:05"
str_time := date_time.Format(timeFormat)
return (str_time + "." + strconv.Itoa(int(decimal)))
}
src/connector/go/src/taosSql/rows.go 已删除 100755 → 0
浏览文件 @ cec86924
/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package taosSql
/*
#cgo CFLAGS : -I/usr/include
#cgo LDFLAGS: -L/usr/lib -ltaos
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <taos.h>
*/
import "C"
import (
"database/sql"
"database/sql/driver"
"io"
"math"
"reflect"
)
type taosSqlField struct {
tableName string
name string
length uint32
flags fieldFlag // indicate whether this field can is null
fieldType fieldType
decimals byte
charSet uint8
}
type resultSet struct {
columns []taosSqlField
columnNames []string
done bool
}
type taosSqlRows struct {
mc *taosConn
rs resultSet
}
type binaryRows struct {
taosSqlRows
}
type textRows struct {
taosSqlRows
}
func (rows *taosSqlRows) Columns() []string {
if rows.rs.columnNames != nil {
return rows.rs.columnNames
}
columns := make([]string, len(rows.rs.columns))
if rows.mc != nil && rows.mc.cfg.columnsWithAlias {
for i := range columns {
if tableName := rows.rs.columns[i].tableName; len(tableName) > 0 {
columns[i] = tableName + "." + rows.rs.columns[i].name
} else {
columns[i] = rows.rs.columns[i].name
}
}
} else {
for i := range columns {
columns[i] = rows.rs.columns[i].name
}
}
rows.rs.columnNames = columns
return columns
}
func (rows *taosSqlRows) ColumnTypeDatabaseTypeName(i int) string {
return rows.rs.columns[i].typeDatabaseName()
}
func (rows *taosSqlRows) ColumnTypeLength(i int) (length int64, ok bool) {
return int64(rows.rs.columns[i].length), true
}
func (rows *taosSqlRows) ColumnTypeNullable(i int) (nullable, ok bool) {
return rows.rs.columns[i].flags&flagNotNULL == 0, true
}
func (rows *taosSqlRows) ColumnTypePrecisionScale(i int) (int64, int64, bool) {
column := rows.rs.columns[i]
decimals := int64(column.decimals)
switch column.fieldType {
case C.TSDB_DATA_TYPE_FLOAT:
fallthrough
case C.TSDB_DATA_TYPE_DOUBLE:
if decimals == 0x1f {
return math.MaxInt64, math.MaxInt64, true
}
return math.MaxInt64, decimals, true
}
return 0, 0, false
}
func (rows *taosSqlRows) ColumnTypeScanType(i int) reflect.Type {
return rows.rs.columns[i].scanType()
}
func (rows *taosSqlRows) Close() error {
if rows.mc != nil {
result := C.taos_use_result(rows.mc.taos)
if result != nil {
C.taos_free_result(result)
}
rows.mc = nil
}
return nil
}
func (rows *taosSqlRows) HasNextResultSet() (b bool) {
if rows.mc == nil {
return false
}
return rows.mc.status&statusMoreResultsExists != 0
}
func (rows *taosSqlRows) nextResultSet() (int, error) {
if rows.mc == nil {
return 0, io.EOF
}
// Remove unread packets from stream
if !rows.rs.done {
rows.rs.done = true
}
if !rows.HasNextResultSet() {
rows.mc = nil
return 0, io.EOF
}
rows.rs = resultSet{}
return 0,nil
}
func (rows *taosSqlRows) nextNotEmptyResultSet() (int, error) {
for {
resLen, err := rows.nextResultSet()
if err != nil {
return 0, err
}
if resLen > 0 {
return resLen, nil
}
rows.rs.done = true
}
}
func (rows *binaryRows) NextResultSet() error {
resLen, err := rows.nextNotEmptyResultSet()
if err != nil {
return err
}
rows.rs.columns, err = rows.mc.readColumns(resLen)
return err
}
// stmt.Query return binary rows, and get row from this func
func (rows *binaryRows) Next(dest []driver.Value) error {
if mc := rows.mc; mc != nil {
// Fetch next row from stream
return rows.readRow(dest)
}
return io.EOF
}
func (rows *textRows) NextResultSet() (err error) {
resLen, err := rows.nextNotEmptyResultSet()
if err != nil {
return err
}
rows.rs.columns, err = rows.mc.readColumns(resLen)
return err
}
// db.Query return text rows, and get row from this func
func (rows *textRows) Next(dest []driver.Value) error {
if mc := rows.mc; mc != nil {
// Fetch next row from stream
return rows.readRow(dest)
}
return io.EOF
}
func (mf *taosSqlField) typeDatabaseName() string {
//fmt.Println("######## (mf *taosSqlField) typeDatabaseName() mf.fieldType:", mf.fieldType)
switch mf.fieldType {
case C.TSDB_DATA_TYPE_BOOL:
return "BOOL"
case C.TSDB_DATA_TYPE_TINYINT:
return "TINYINT"
case C.TSDB_DATA_TYPE_SMALLINT:
return "SMALLINT"
case C.TSDB_DATA_TYPE_INT:
return "INT"
case C.TSDB_DATA_TYPE_BIGINT:
return "BIGINT"
case C.TSDB_DATA_TYPE_FLOAT:
return "FLOAT"
case C.TSDB_DATA_TYPE_DOUBLE:
return "DOUBLE"
case C.TSDB_DATA_TYPE_BINARY:
return "BINARY"
case C.TSDB_DATA_TYPE_NCHAR:
return "NCHAR"
case C.TSDB_DATA_TYPE_TIMESTAMP:
return "TIMESTAMP"
default:
return ""
}
}
var (
scanTypeFloat32 = reflect.TypeOf(float32(0))
scanTypeFloat64 = reflect.TypeOf(float64(0))
scanTypeInt8 = reflect.TypeOf(int8(0))
scanTypeInt16 = reflect.TypeOf(int16(0))
scanTypeInt32 = reflect.TypeOf(int32(0))
scanTypeInt64 = reflect.TypeOf(int64(0))
scanTypeNullTime = reflect.TypeOf(NullTime{})
scanTypeRawBytes = reflect.TypeOf(sql.RawBytes{})
scanTypeUnknown = reflect.TypeOf(new(interface{}))
)
func (mf *taosSqlField) scanType() reflect.Type {
//fmt.Println("######## (mf *taosSqlField) scanType() mf.fieldType:", mf.fieldType)
switch mf.fieldType {
case C.TSDB_DATA_TYPE_BOOL:
return scanTypeInt8
case C.TSDB_DATA_TYPE_TINYINT:
return scanTypeInt8
case C.TSDB_DATA_TYPE_SMALLINT:
return scanTypeInt16
case C.TSDB_DATA_TYPE_INT:
return scanTypeInt32
case C.TSDB_DATA_TYPE_BIGINT:
return scanTypeInt64
case C.TSDB_DATA_TYPE_FLOAT:
return scanTypeFloat32
case C.TSDB_DATA_TYPE_DOUBLE:
return scanTypeFloat64
case C.TSDB_DATA_TYPE_BINARY:
return scanTypeRawBytes
case C.TSDB_DATA_TYPE_NCHAR:
return scanTypeRawBytes
case C.TSDB_DATA_TYPE_TIMESTAMP:
return scanTypeNullTime
default:
return scanTypeUnknown
}
}
src/connector/go/src/taosSql/statement.go 已删除 100755 → 0
浏览文件 @ cec86924
/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package taosSql
import (
"database/sql/driver"
"fmt"
"reflect"
)
type taosSqlStmt struct {
mc *taosConn
id uint32
pSql string
paramCount int
}
func (stmt *taosSqlStmt) Close() error {
return nil
}
func (stmt *taosSqlStmt) NumInput() int {
return stmt.paramCount
}
func (stmt *taosSqlStmt) Exec(args []driver.Value) (driver.Result, error) {
if stmt.mc == nil || stmt.mc.taos == nil {
return nil, errInvalidConn
}
return stmt.mc.Exec(stmt.pSql, args)
}
func (stmt *taosSqlStmt) Query(args []driver.Value) (driver.Rows, error) {
if stmt.mc == nil || stmt.mc.taos == nil {
return nil, errInvalidConn
}
return stmt.query(args)
}
func (stmt *taosSqlStmt) query(args []driver.Value) (*binaryRows, error) {
mc := stmt.mc
if mc == nil || mc.taos == nil {
return nil, errInvalidConn
}
querySql := stmt.pSql
if len(args) != 0 {
if !mc.cfg.interpolateParams {
return nil, driver.ErrSkip
}
// try client-side prepare to reduce roundtrip
prepared, err := mc.interpolateParams(stmt.pSql, args)
if err != nil {
return nil, err
}
querySql = prepared
}
num_fields, err := mc.taosQuery(querySql)
if err == nil {
// Read Result
rows := new(binaryRows)
rows.mc = mc
// Columns field
rows.rs.columns, err = mc.readColumns(num_fields)
return rows, err
}
return nil, err
}
type converter struct{}
// ConvertValue mirrors the reference/default converter in database/sql/driver
// with _one_ exception. We support uint64 with their high bit and the default
// implementation does not. This function should be kept in sync with
// database/sql/driver defaultConverter.ConvertValue() except for that
// deliberate difference.
func (c converter) ConvertValue(v interface{}) (driver.Value, error) {
if driver.IsValue(v) {
return v, nil
}
if vr, ok := v.(driver.Valuer); ok {
sv, err := callValuerValue(vr)
if err != nil {
return nil, err
}
if !driver.IsValue(sv) {
return nil, fmt.Errorf("non-Value type %T returned from Value", sv)
}
return sv, nil
}
rv := reflect.ValueOf(v)
switch rv.Kind() {
case reflect.Ptr:
// indirect pointers
if rv.IsNil() {
return nil, nil
} else {
return c.ConvertValue(rv.Elem().Interface())
}
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return rv.Int(), nil
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return rv.Uint(), nil
case reflect.Float32, reflect.Float64:
return rv.Float(), nil
case reflect.Bool:
return rv.Bool(), nil
case reflect.Slice:
ek := rv.Type().Elem().Kind()
if ek == reflect.Uint8 {
return rv.Bytes(), nil
}
return nil, fmt.Errorf("unsupported type %T, a slice of %s", v, ek)
case reflect.String:
return rv.String(), nil
}
return nil, fmt.Errorf("unsupported type %T, a %s", v, rv.Kind())
}
var valuerReflectType = reflect.TypeOf((*driver.Valuer)(nil)).Elem()
// callValuerValue returns vr.Value(), with one exception:
// If vr.Value is an auto-generated method on a pointer type and the
// pointer is nil, it would panic at runtime in the panicwrap
// method. Treat it like nil instead.
//
// This is so people can implement driver.Value on value types and
// still use nil pointers to those types to mean nil/NULL, just like
// string/*string.
//
// This is an exact copy of the same-named unexported function from the
// database/sql package.
func callValuerValue(vr driver.Valuer) (v driver.Value, err error) {
if rv := reflect.ValueOf(vr); rv.Kind() == reflect.Ptr &&
rv.IsNil() &&
rv.Type().Elem().Implements(valuerReflectType) {
return nil, nil
}
return vr.Value()
}
src/connector/go/src/taosSql/taosLog.go 已删除 100755 → 0
浏览文件 @ cec86924
/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package taosSql
import (
"bufio"
"errors"
"fmt"
"io"
"log"
"os"
"strings"
)
// Various errors the driver might return.
var (
errInvalidConn = errors.New("invalid connection")
errConnNoExist = errors.New("no existent connection ")
)
var taosLog *log.Logger
// SetLogger is used to set the logger for critical errors.
// The initial logger
func taosLogInit() {
cfgName := "/etc/taos/taos.cfg"
logNameDefault := "/var/log/taos/taosgo.log"
var logName string
// get log path from cfg file
cfgFile, err := os.OpenFile(cfgName, os.O_RDONLY, 0644)
defer cfgFile.Close()
if err != nil {
fmt.Println(err)
logName = logNameDefault
} else {
logName, err = getLogNameFromCfg(cfgFile)
if err != nil {
fmt.Println(err)
logName = logNameDefault
}
}
logFile, err := os.OpenFile(logName, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
taosLog = log.New(logFile, "", log.LstdFlags)
taosLog.SetPrefix("TAOS DRIVER ")
taosLog.SetFlags(log.LstdFlags|log.Lshortfile)
}
func getLogNameFromCfg(f *os.File) (string, error) {
// Create file buf, *Reader
r := bufio.NewReader(f)
for {
//read one line, return to slice b
b, _, err := r.ReadLine()
if err != nil {
if err == io.EOF {
break
}
panic(err)
}
// Remove space of left and right
s := strings.TrimSpace(string(b))
if strings.Index(s, "#") == 0 {
// comment line
continue
}
if len(s) == 0 {
continue
}
var ns string
// If there is a comment on the right of the line, must be remove
index := strings.Index(s, "#")
if index > 0 {
// Gets the string to the left of the comment to determine whether it is empty
ns = s[:index]
if len(ns) == 0 {
continue
}
} else {
ns = s;
}
ss := strings.Fields(ns)
if strings.Compare("logDir", ss[0]) != 0 {
continue
}
if len(ss) < 2 {
break
}
// Add a filename after the path
logName := ss[1] + "/taosgo.log"
return logName,nil
}
return "", errors.New("no config log path, use default")
}
src/connector/go/src/taosSql/taosSqlCgo.go 已删除 100755 → 0
浏览文件 @ cec86924
/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package taosSql
/*
#cgo CFLAGS : -I/usr/include
#cgo LDFLAGS: -L/usr/lib -ltaos
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <taos.h>
*/
import "C"
import (
"errors"
"unsafe"
)
func (mc *taosConn) taosConnect(ip, user, pass, db string, port int) (taos unsafe.Pointer, err error) {
cuser := C.CString(user)
cpass := C.CString(pass)
cip := C.CString(ip)
cdb := C.CString(db)
defer C.free(unsafe.Pointer(cip))
defer C.free(unsafe.Pointer(cuser))
defer C.free(unsafe.Pointer(cpass))
defer C.free(unsafe.Pointer(cdb))
taosObj := C.taos_connect(cip, cuser, cpass, cdb, (C.ushort)(port))
if taosObj == nil {
return nil, errors.New("taos_connect() fail!")
}
return (unsafe.Pointer)(taosObj), nil
}
func (mc *taosConn) taosQuery(sqlstr string) (int, error) {
//taosLog.Printf("taosQuery() input sql:%s\n", sqlstr)
csqlstr := C.CString(sqlstr)
defer C.free(unsafe.Pointer(csqlstr))
code := int(C.taos_query(mc.taos, csqlstr))
if 0 != code {
mc.taos_error()
errStr := C.GoString(C.taos_errstr(mc.taos))
taosLog.Println("taos_query() failed:", errStr)
taosLog.Printf("taosQuery() input sql:%s\n", sqlstr)
return 0, errors.New(errStr)
}
// read result and save into mc struct
num_fields := int(C.taos_field_count(mc.taos))
if 0 == num_fields { // there are no select and show kinds of commands
mc.affectedRows = int(C.taos_affected_rows(mc.taos))
mc.insertId = 0
}
return num_fields, nil
}
func (mc *taosConn) taos_close() {
C.taos_close(mc.taos)
}
func (mc *taosConn) taos_error() {
// free local resouce: allocated memory/metric-meta refcnt
//var pRes unsafe.Pointer
pRes := C.taos_use_result(mc.taos)
C.taos_free_result(pRes)
}
src/connector/go/src/taosSql/utils.go 已删除 100755 → 0
浏览文件 @ cec86924
/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package taosSql
/*
#cgo CFLAGS : -I/usr/include
#include <stdlib.h>
#cgo LDFLAGS: -L/usr/lib -ltaos
void taosSetAllocMode(int mode, const char* path, _Bool autoDump);
void taosDumpMemoryLeak();
*/
import "C"
import (
"database/sql/driver"
"errors"
"fmt"
"sync/atomic"
"time"
"unsafe"
)
// Returns the bool value of the input.
// The 2nd return value indicates if the input was a valid bool value
func readBool(input string) (value bool, valid bool) {
switch input {
case "1", "true", "TRUE", "True":
return true, true
case "0", "false", "FALSE", "False":
return false, true
}
// Not a valid bool value
return
}
/******************************************************************************
* Time related utils *
******************************************************************************/
// NullTime represents a time.Time that may be NULL.
// NullTime implements the Scanner interface so
// it can be used as a scan destination:
//
// var nt NullTime
// err := db.QueryRow("SELECT time FROM foo WHERE id=?", id).Scan(&nt)
// ...
// if nt.Valid {
// // use nt.Time
// } else {
// // NULL value
// }
//
// This NullTime implementation is not driver-specific
type NullTime struct {
Time time.Time
Valid bool // Valid is true if Time is not NULL
}
// Scan implements the Scanner interface.
// The value type must be time.Time or string / []byte (formatted time-string),
// otherwise Scan fails.
func (nt *NullTime) Scan(value interface{}) (err error) {
if value == nil {
nt.Time, nt.Valid = time.Time{}, false
return
}
switch v := value.(type) {
case time.Time:
nt.Time, nt.Valid = v, true
return
case []byte:
nt.Time, err = parseDateTime(string(v), time.UTC)
nt.Valid = (err == nil)
return
case string:
nt.Time, err = parseDateTime(v, time.UTC)
nt.Valid = (err == nil)
return
}
nt.Valid = false
return fmt.Errorf("Can't convert %T to time.Time", value)
}
// Value implements the driver Valuer interface.
func (nt NullTime) Value() (driver.Value, error) {
if !nt.Valid {
return nil, nil
}
return nt.Time, nil
}
func parseDateTime(str string, loc *time.Location) (t time.Time, err error) {
base := "0000-00-00 00:00:00.0000000"
switch len(str) {
case 10, 19, 21, 22, 23, 24, 25, 26: // up to "YYYY-MM-DD HH:MM:SS.MMMMMM"
if str == base[:len(str)] {
return
}
t, err = time.Parse(timeFormat[:len(str)], str)
default:
err = fmt.Errorf("invalid time string: %s", str)
return
}
// Adjust location
if err == nil && loc != time.UTC {
y, mo, d := t.Date()
h, mi, s := t.Clock()
t, err = time.Date(y, mo, d, h, mi, s, t.Nanosecond(), loc), nil
}
return
}
// zeroDateTime is used in formatBinaryDateTime to avoid an allocation
// if the DATE or DATETIME has the zero value.
// It must never be changed.
// The current behavior depends on database/sql copying the result.
var zeroDateTime = []byte("0000-00-00 00:00:00.000000")
const digits01 = "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789"
const digits10 = "0000000000111111111122222222223333333333444444444455555555556666666666777777777788888888889999999999"
/******************************************************************************
* Convert from and to bytes *
******************************************************************************/
func uint64ToBytes(n uint64) []byte {
return []byte{
byte(n),
byte(n >> 8),
byte(n >> 16),
byte(n >> 24),
byte(n >> 32),
byte(n >> 40),
byte(n >> 48),
byte(n >> 56),
}
}
func uint64ToString(n uint64) []byte {
var a [20]byte
i := 20
// U+0030 = 0
// ...
// U+0039 = 9
var q uint64
for n >= 10 {
i--
q = n / 10
a[i] = uint8(n-q*10) + 0x30
n = q
}
i--
a[i] = uint8(n) + 0x30
return a[i:]
}
// treats string value as unsigned integer representation
func stringToInt(b []byte) int {
val := 0
for i := range b {
val *= 10
val += int(b[i] - 0x30)
}
return val
}
// reserveBuffer checks cap(buf) and expand buffer to len(buf) + appendSize.
// If cap(buf) is not enough, reallocate new buffer.
func reserveBuffer(buf []byte, appendSize int) []byte {
newSize := len(buf) + appendSize
if cap(buf) < newSize {
// Grow buffer exponentially
newBuf := make([]byte, len(buf)*2+appendSize)
copy(newBuf, buf)
buf = newBuf
}
return buf[:newSize]
}
// escapeBytesBackslash escapes []byte with backslashes (\)
// This escapes the contents of a string (provided as []byte) by adding backslashes before special
// characters, and turning others into specific escape sequences, such as
// turning newlines into \n and null bytes into \0.
func escapeBytesBackslash(buf, v []byte) []byte {
pos := len(buf)
buf = reserveBuffer(buf, len(v)*2)
for _, c := range v {
switch c {
case '\x00':
buf[pos] = '\\'
buf[pos+1] = '0'
pos += 2
case '\n':
buf[pos] = '\\'
buf[pos+1] = 'n'
pos += 2
case '\r':
buf[pos] = '\\'
buf[pos+1] = 'r'
pos += 2
case '\x1a':
buf[pos] = '\\'
buf[pos+1] = 'Z'
pos += 2
case '\'':
buf[pos] = '\\'
buf[pos+1] = '\''
pos += 2
case '"':
buf[pos] = '\\'
buf[pos+1] = '"'
pos += 2
case '\\':
buf[pos] = '\\'
buf[pos+1] = '\\'
pos += 2
default:
buf[pos] = c
pos++
}
}
return buf[:pos]
}
// escapeStringBackslash is similar to escapeBytesBackslash but for string.
func escapeStringBackslash(buf []byte, v string) []byte {
pos := len(buf)
buf = reserveBuffer(buf, len(v)*2)
for i := 0; i < len(v); i++ {
c := v[i]
switch c {
case '\x00':
buf[pos] = '\\'
buf[pos+1] = '0'
pos += 2
case '\n':
buf[pos] = '\\'
buf[pos+1] = 'n'
pos += 2
case '\r':
buf[pos] = '\\'
buf[pos+1] = 'r'
pos += 2
case '\x1a':
buf[pos] = '\\'
buf[pos+1] = 'Z'
pos += 2
//case '\'':
// buf[pos] = '\\'
// buf[pos+1] = '\''
// pos += 2
case '"':
buf[pos] = '\\'
buf[pos+1] = '"'
pos += 2
case '\\':
buf[pos] = '\\'
buf[pos+1] = '\\'
pos += 2
default:
buf[pos] = c
pos++
}
}
return buf[:pos]
}
// escapeBytesQuotes escapes apostrophes in []byte by doubling them up.
// This escapes the contents of a string by doubling up any apostrophes that
// it contains. This is used when the NO_BACKSLASH_ESCAPES SQL_MODE is in
// effect on the server.
func escapeBytesQuotes(buf, v []byte) []byte {
pos := len(buf)
buf = reserveBuffer(buf, len(v)*2)
for _, c := range v {
if c == '\'' {
buf[pos] = '\''
buf[pos+1] = '\''
pos += 2
} else {
buf[pos] = c
pos++
}
}
return buf[:pos]
}
// escapeStringQuotes is similar to escapeBytesQuotes but for string.
func escapeStringQuotes(buf []byte, v string) []byte {
pos := len(buf)
buf = reserveBuffer(buf, len(v)*2)
for i := 0; i < len(v); i++ {
c := v[i]
if c == '\'' {
buf[pos] = '\''
buf[pos+1] = '\''
pos += 2
} else {
buf[pos] = c
pos++
}
}
return buf[:pos]
}
/******************************************************************************
* Sync utils *
******************************************************************************/
// noCopy may be embedded into structs which must not be copied
// after the first use.
//
// See https://github.com/golang/go/issues/8005#issuecomment-190753527
// for details.
type noCopy struct{}
// Lock is a no-op used by -copylocks checker from `go vet`.
func (*noCopy) Lock() {}
// atomicBool is a wrapper around uint32 for usage as a boolean value with
// atomic access.
type atomicBool struct {
_noCopy noCopy
value uint32
}
// IsSet returns whether the current boolean value is true
func (ab *atomicBool) IsSet() bool {
return atomic.LoadUint32(&ab.value) > 0
}
// Set sets the value of the bool regardless of the previous value
func (ab *atomicBool) Set(value bool) {
if value {
atomic.StoreUint32(&ab.value, 1)
} else {
atomic.StoreUint32(&ab.value, 0)
}
}
// TrySet sets the value of the bool and returns whether the value changed
func (ab *atomicBool) TrySet(value bool) bool {
if value {
return atomic.SwapUint32(&ab.value, 1) == 0
}
return atomic.SwapUint32(&ab.value, 0) > 0
}
// atomicError is a wrapper for atomically accessed error values
type atomicError struct {
_noCopy noCopy
value atomic.Value
}
// Set sets the error value regardless of the previous value.
// The value must not be nil
func (ae *atomicError) Set(value error) {
ae.value.Store(value)
}
// Value returns the current error value
func (ae *atomicError) Value() error {
if v := ae.value.Load(); v != nil {
// this will panic if the value doesn't implement the error interface
return v.(error)
}
return nil
}
func namedValueToValue(named []driver.NamedValue) ([]driver.Value, error) {
dargs := make([]driver.Value, len(named))
for n, param := range named {
if len(param.Name) > 0 {
// TODO: support the use of Named Parameters #561
return nil, errors.New("taosSql: driver does not support the use of Named Parameters")
}
dargs[n] = param.Value
}
return dargs, nil
}
/******************************************************************************
* Utils for C memory issues debugging *
******************************************************************************/
func SetAllocMode(mode int32, path string) {
cpath := C.CString(path)
defer C.free(unsafe.Pointer(cpath))
C.taosSetAllocMode(C.int(mode), cpath, false)
}
func DumpMemoryLeak() {
C.taosDumpMemoryLeak()
}
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