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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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"License" shall mean the terms and conditions for use, reproduction,
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5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
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this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
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7. Disclaimer of Warranty. Unless required by applicable law or
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whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
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on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
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APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "{}"
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Copyright 2014 Outbrain Inc
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

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Common Go libraries
To import & use:
```
go get "github.com/openark/golib/math"
go get "github.com/openark/golib/sqlutils"
go get "github.com/openark/golib/tests"
...
```

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module github.com/openark/golib
go 1.16

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/*
Copyright 2014 Outbrain Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package log
import (
"errors"
"fmt"
"log/syslog"
"os"
"runtime/debug"
"time"
)
// LogLevel indicates the severity of a log entry
type LogLevel int
func (this LogLevel) String() string {
switch this {
case FATAL:
return "FATAL"
case CRITICAL:
return "CRITICAL"
case ERROR:
return "ERROR"
case WARNING:
return "WARNING"
case NOTICE:
return "NOTICE"
case INFO:
return "INFO"
case DEBUG:
return "DEBUG"
}
return "unknown"
}
func LogLevelFromString(logLevelName string) (LogLevel, error) {
switch logLevelName {
case "FATAL":
return FATAL, nil
case "CRITICAL":
return CRITICAL, nil
case "ERROR":
return ERROR, nil
case "WARNING":
return WARNING, nil
case "NOTICE":
return NOTICE, nil
case "INFO":
return INFO, nil
case "DEBUG":
return DEBUG, nil
}
return 0, fmt.Errorf("Unknown LogLevel name: %+v", logLevelName)
}
const (
FATAL LogLevel = iota
CRITICAL
ERROR
WARNING
NOTICE
INFO
DEBUG
)
const TimeFormat = "2006-01-02 15:04:05"
// globalLogLevel indicates the global level filter for all logs (only entries with level equals or higher
// than this value will be logged)
var globalLogLevel LogLevel = DEBUG
var printStackTrace bool = false
// syslogWriter is optional, and defaults to nil (disabled)
var syslogLevel LogLevel = ERROR
var syslogWriter *syslog.Writer
// SetPrintStackTrace enables/disables dumping the stack upon error logging
func SetPrintStackTrace(shouldPrintStackTrace bool) {
printStackTrace = shouldPrintStackTrace
}
// SetLevel sets the global log level. Only entries with level equals or higher than
// this value will be logged
func SetLevel(logLevel LogLevel) {
globalLogLevel = logLevel
}
// GetLevel returns current global log level
func GetLevel() LogLevel {
return globalLogLevel
}
// EnableSyslogWriter enables, if possible, writes to syslog. These will execute _in addition_ to normal logging
func EnableSyslogWriter(tag string) (err error) {
syslogWriter, err = syslog.New(syslog.LOG_ERR, tag)
if err != nil {
syslogWriter = nil
}
return err
}
// SetSyslogLevel sets the minimal syslog level. Only entries with level equals or higher than
// this value will be logged. However, this is also capped by the global log level. That is,
// messages with lower level than global-log-level will be discarded at any case.
func SetSyslogLevel(logLevel LogLevel) {
syslogLevel = logLevel
}
// logFormattedEntry nicely formats and emits a log entry
func logFormattedEntry(logLevel LogLevel, message string, args ...interface{}) string {
if logLevel > globalLogLevel {
return ""
}
// if TZ env variable is set, update the timestamp timezone
localizedTime := time.Now()
tzLocation := os.Getenv("TZ")
if tzLocation != "" {
location, err := time.LoadLocation(tzLocation)
if err == nil { // if invalid tz location was provided, just leave it as the default
localizedTime = time.Now().In(location)
}
}
msgArgs := fmt.Sprintf(message, args...)
entryString := fmt.Sprintf("%s %s %s", localizedTime.Format(TimeFormat), logLevel, msgArgs)
fmt.Fprintln(os.Stderr, entryString)
if syslogWriter != nil {
go func() error {
if logLevel > syslogLevel {
return nil
}
switch logLevel {
case FATAL:
return syslogWriter.Emerg(msgArgs)
case CRITICAL:
return syslogWriter.Crit(msgArgs)
case ERROR:
return syslogWriter.Err(msgArgs)
case WARNING:
return syslogWriter.Warning(msgArgs)
case NOTICE:
return syslogWriter.Notice(msgArgs)
case INFO:
return syslogWriter.Info(msgArgs)
case DEBUG:
return syslogWriter.Debug(msgArgs)
}
return nil
}()
}
return entryString
}
// logEntry emits a formatted log entry
func logEntry(logLevel LogLevel, message string, args ...interface{}) string {
entryString := message
for _, s := range args {
entryString += fmt.Sprintf(" %s", s)
}
return logFormattedEntry(logLevel, entryString)
}
// logErrorEntry emits a log entry based on given error object
func logErrorEntry(logLevel LogLevel, err error) error {
if err == nil {
// No error
return nil
}
entryString := fmt.Sprintf("%+v", err)
logEntry(logLevel, entryString)
if printStackTrace {
debug.PrintStack()
}
return err
}
func Debug(message string, args ...interface{}) string {
return logEntry(DEBUG, message, args...)
}
func Debugf(message string, args ...interface{}) string {
return logFormattedEntry(DEBUG, message, args...)
}
func Info(message string, args ...interface{}) string {
return logEntry(INFO, message, args...)
}
func Infof(message string, args ...interface{}) string {
return logFormattedEntry(INFO, message, args...)
}
func Notice(message string, args ...interface{}) string {
return logEntry(NOTICE, message, args...)
}
func Noticef(message string, args ...interface{}) string {
return logFormattedEntry(NOTICE, message, args...)
}
func Warning(message string, args ...interface{}) error {
return errors.New(logEntry(WARNING, message, args...))
}
func Warningf(message string, args ...interface{}) error {
return errors.New(logFormattedEntry(WARNING, message, args...))
}
func Error(message string, args ...interface{}) error {
return errors.New(logEntry(ERROR, message, args...))
}
func Errorf(message string, args ...interface{}) error {
return errors.New(logFormattedEntry(ERROR, message, args...))
}
func Errore(err error) error {
return logErrorEntry(ERROR, err)
}
func Critical(message string, args ...interface{}) error {
return errors.New(logEntry(CRITICAL, message, args...))
}
func Criticalf(message string, args ...interface{}) error {
return errors.New(logFormattedEntry(CRITICAL, message, args...))
}
func Criticale(err error) error {
return logErrorEntry(CRITICAL, err)
}
// Fatal emits a FATAL level entry and exists the program
func Fatal(message string, args ...interface{}) error {
logEntry(FATAL, message, args...)
os.Exit(1)
return errors.New(logEntry(CRITICAL, message, args...))
}
// Fatalf emits a FATAL level entry and exists the program
func Fatalf(message string, args ...interface{}) error {
logFormattedEntry(FATAL, message, args...)
os.Exit(1)
return errors.New(logFormattedEntry(CRITICAL, message, args...))
}
// Fatale emits a FATAL level entry and exists the program
func Fatale(err error) error {
logErrorEntry(FATAL, err)
os.Exit(1)
return err
}

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/*
Copyright 2014 Shlomi Noach.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package math
func MinInt(i1, i2 int) int {
if i1 < i2 {
return i1
}
return i2
}
func MaxInt(i1, i2 int) int {
if i1 > i2 {
return i1
}
return i2
}
func MinInt64(i1, i2 int64) int64 {
if i1 < i2 {
return i1
}
return i2
}
func MaxInt64(i1, i2 int64) int64 {
if i1 > i2 {
return i1
}
return i2
}
func MinUInt(i1, i2 uint) uint {
if i1 < i2 {
return i1
}
return i2
}
func MaxUInt(i1, i2 uint) uint {
if i1 > i2 {
return i1
}
return i2
}
func MinUInt64(i1, i2 uint64) uint64 {
if i1 < i2 {
return i1
}
return i2
}
func MaxUInt64(i1, i2 uint64) uint64 {
if i1 > i2 {
return i1
}
return i2
}
func MinString(i1, i2 string) string {
if i1 < i2 {
return i1
}
return i2
}
func MaxString(i1, i2 string) string {
if i1 > i2 {
return i1
}
return i2
}
// TernaryString acts like a "? :" C-style ternary operator for strings
func TernaryString(condition bool, resTrue string, resFalse string) string {
if condition {
return resTrue
}
return resFalse
}
// TernaryString acts like a "? :" C-style ternary operator for ints
func TernaryInt(condition bool, resTrue int, resFalse int) int {
if condition {
return resTrue
}
return resFalse
}
// AbsInt is an ABS function for int type
func AbsInt(i int) int {
if i >= 0 {
return i
}
return -i
}
// AbsInt64 is an ABS function for int64 type
func AbsInt64(i int64) int64 {
if i >= 0 {
return i
}
return -i
}

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/*
Copyright 2017 GitHub Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package sqlutils
import (
"regexp"
"strings"
)
type regexpMap struct {
r *regexp.Regexp
replacement string
}
func (this *regexpMap) process(text string) (result string) {
return this.r.ReplaceAllString(text, this.replacement)
}
func rmap(regexpExpression string, replacement string) regexpMap {
return regexpMap{
r: regexp.MustCompile(regexpSpaces(regexpExpression)),
replacement: replacement,
}
}
func regexpSpaces(statement string) string {
return strings.Replace(statement, " ", `[\s]+`, -1)
}
func applyConversions(statement string, conversions []regexpMap) string {
for _, rmap := range conversions {
statement = rmap.process(statement)
}
return statement
}

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/*
Copyright 2017 GitHub Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// What's this about?
// This is a brute-force regular-expression based conversion from MySQL syntax to sqlite3 syntax.
// It is NOT meant to be a general purpose solution and is only expected & confirmed to run on
// queries issued by orchestrator. There are known limitations to this design.
// It's not even pretty.
// In fact...
// Well, it gets the job done at this time. Call it debt.
package sqlutils
import (
"regexp"
)
var sqlite3CreateTableConversions = []regexpMap{
rmap(`(?i) (character set|charset) [\S]+`, ``),
rmap(`(?i)int unsigned`, `int`),
rmap(`(?i)int[\s]*[(][\s]*([0-9]+)[\s]*[)] unsigned`, `int`),
rmap(`(?i)engine[\s]*=[\s]*(innodb|myisam|ndb|memory|tokudb)`, ``),
rmap(`(?i)DEFAULT CHARSET[\s]*=[\s]*[\S]+`, ``),
rmap(`(?i)[\S]*int( not null|) auto_increment`, `integer`),
rmap(`(?i)comment '[^']*'`, ``),
rmap(`(?i)after [\S]+`, ``),
rmap(`(?i)alter table ([\S]+) add (index|key) ([\S]+) (.+)`, `create index ${3}_${1} on $1 $4`),
rmap(`(?i)alter table ([\S]+) add unique (index|key) ([\S]+) (.+)`, `create unique index ${3}_${1} on $1 $4`),
rmap(`(?i)([\S]+) enum[\s]*([(].*?[)])`, `$1 text check($1 in $2)`),
rmap(`(?i)([\s\S]+[/][*] sqlite3-skip [*][/][\s\S]+)`, ``),
rmap(`(?i)timestamp default current_timestamp`, `timestamp default ('')`),
rmap(`(?i)timestamp not null default current_timestamp`, `timestamp not null default ('')`),
rmap(`(?i)add column (.*int) not null[\s]*$`, `add column $1 not null default 0`),
rmap(`(?i)add column (.* text) not null[\s]*$`, `add column $1 not null default ''`),
rmap(`(?i)add column (.* varchar.*) not null[\s]*$`, `add column $1 not null default ''`),
}
var sqlite3InsertConversions = []regexpMap{
rmap(`(?i)insert ignore ([\s\S]+) on duplicate key update [\s\S]+`, `insert or ignore $1`),
rmap(`(?i)insert ignore`, `insert or ignore`),
rmap(`(?i)now[(][)]`, `datetime('now')`),
rmap(`(?i)insert into ([\s\S]+) on duplicate key update [\s\S]+`, `replace into $1`),
}
var sqlite3GeneralConversions = []regexpMap{
rmap(`(?i)now[(][)][\s]*[-][\s]*interval [?] ([\w]+)`, `datetime('now', printf('-%d $1', ?))`),
rmap(`(?i)now[(][)][\s]*[+][\s]*interval [?] ([\w]+)`, `datetime('now', printf('+%d $1', ?))`),
rmap(`(?i)now[(][)][\s]*[-][\s]*interval ([0-9.]+) ([\w]+)`, `datetime('now', '-${1} $2')`),
rmap(`(?i)now[(][)][\s]*[+][\s]*interval ([0-9.]+) ([\w]+)`, `datetime('now', '+${1} $2')`),
rmap(`(?i)[=<>\s]([\S]+[.][\S]+)[\s]*[-][\s]*interval [?] ([\w]+)`, ` datetime($1, printf('-%d $2', ?))`),
rmap(`(?i)[=<>\s]([\S]+[.][\S]+)[\s]*[+][\s]*interval [?] ([\w]+)`, ` datetime($1, printf('+%d $2', ?))`),
rmap(`(?i)unix_timestamp[(][)]`, `strftime('%s', 'now')`),
rmap(`(?i)unix_timestamp[(]([^)]+)[)]`, `strftime('%s', $1)`),
rmap(`(?i)now[(][)]`, `datetime('now')`),
rmap(`(?i)cast[(][\s]*([\S]+) as signed[\s]*[)]`, `cast($1 as integer)`),
rmap(`(?i)\bconcat[(][\s]*([^,)]+)[\s]*,[\s]*([^,)]+)[\s]*[)]`, `($1 || $2)`),
rmap(`(?i)\bconcat[(][\s]*([^,)]+)[\s]*,[\s]*([^,)]+)[\s]*,[\s]*([^,)]+)[\s]*[)]`, `($1 || $2 || $3)`),
rmap(`(?i) rlike `, ` like `),
rmap(`(?i)create index([\s\S]+)[(][\s]*[0-9]+[\s]*[)]([\s\S]+)`, `create index ${1}${2}`),
rmap(`(?i)drop index ([\S]+) on ([\S]+)`, `drop index if exists $1`),
}
var (
sqlite3IdentifyCreateTableStatement = regexp.MustCompile(regexpSpaces(`(?i)^[\s]*create table`))
sqlite3IdentifyCreateIndexStatement = regexp.MustCompile(regexpSpaces(`(?i)^[\s]*create( unique|) index`))
sqlite3IdentifyDropIndexStatement = regexp.MustCompile(regexpSpaces(`(?i)^[\s]*drop index`))
sqlite3IdentifyAlterTableStatement = regexp.MustCompile(regexpSpaces(`(?i)^[\s]*alter table`))
sqlite3IdentifyInsertStatement = regexp.MustCompile(regexpSpaces(`(?i)^[\s]*(insert|replace)`))
)
func IsInsert(statement string) bool {
return sqlite3IdentifyInsertStatement.MatchString(statement)
}
func IsCreateTable(statement string) bool {
return sqlite3IdentifyCreateTableStatement.MatchString(statement)
}
func IsCreateIndex(statement string) bool {
return sqlite3IdentifyCreateIndexStatement.MatchString(statement)
}
func IsDropIndex(statement string) bool {
return sqlite3IdentifyDropIndexStatement.MatchString(statement)
}
func IsAlterTable(statement string) bool {
return sqlite3IdentifyAlterTableStatement.MatchString(statement)
}
func ToSqlite3CreateTable(statement string) string {
return applyConversions(statement, sqlite3CreateTableConversions)
}
func ToSqlite3Insert(statement string) string {
return applyConversions(statement, sqlite3InsertConversions)
}
func ToSqlite3Dialect(statement string) (translated string) {
if IsCreateTable(statement) {
return ToSqlite3CreateTable(statement)
}
if IsAlterTable(statement) {
return ToSqlite3CreateTable(statement)
}
statement = applyConversions(statement, sqlite3GeneralConversions)
if IsInsert(statement) {
return ToSqlite3Insert(statement)
}
return statement
}

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/*
Copyright 2017 GitHub Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package sqlutils
import (
"regexp"
"strings"
"testing"
test "github.com/openark/golib/tests"
)
var spacesRegexp = regexp.MustCompile(`[\s]+`)
func init() {
}
func stripSpaces(statement string) string {
statement = strings.TrimSpace(statement)
statement = spacesRegexp.ReplaceAllString(statement, " ")
return statement
}
func TestIsCreateTable(t *testing.T) {
test.S(t).ExpectTrue(IsCreateTable("create table t(id int)"))
test.S(t).ExpectTrue(IsCreateTable(" create table t(id int)"))
test.S(t).ExpectTrue(IsCreateTable("CREATE TABLE t(id int)"))
test.S(t).ExpectTrue(IsCreateTable(`
create table t(id int)
`))
test.S(t).ExpectFalse(IsCreateTable("where create table t(id int)"))
test.S(t).ExpectFalse(IsCreateTable("insert"))
}
func TestToSqlite3CreateTable(t *testing.T) {
{
statement := "create table t(id int)"
result := ToSqlite3CreateTable(statement)
test.S(t).ExpectEquals(result, statement)
}
{
statement := "create table t(id int, v varchar(123) CHARACTER SET ascii NOT NULL default '')"
result := ToSqlite3CreateTable(statement)
test.S(t).ExpectEquals(result, "create table t(id int, v varchar(123) NOT NULL default '')")
}
{
statement := "create table t(id int, v varchar ( 123 ) CHARACTER SET ascii NOT NULL default '')"
result := ToSqlite3CreateTable(statement)
test.S(t).ExpectEquals(result, "create table t(id int, v varchar ( 123 ) NOT NULL default '')")
}
{
statement := "create table t(i smallint unsigned)"
result := ToSqlite3CreateTable(statement)
test.S(t).ExpectEquals(result, "create table t(i smallint)")
}
{
statement := "create table t(i smallint(5) unsigned)"
result := ToSqlite3CreateTable(statement)
test.S(t).ExpectEquals(result, "create table t(i smallint)")
}
{
statement := "create table t(i smallint ( 5 ) unsigned)"
result := ToSqlite3CreateTable(statement)
test.S(t).ExpectEquals(result, "create table t(i smallint)")
}
}
func TestToSqlite3AlterTable(t *testing.T) {
{
statement := `
ALTER TABLE
database_instance
ADD COLUMN sql_delay INT UNSIGNED NOT NULL AFTER slave_lag_seconds
`
result := stripSpaces(ToSqlite3Dialect(statement))
test.S(t).ExpectEquals(result, stripSpaces(`
ALTER TABLE
database_instance
add column sql_delay int not null default 0
`))
}
{
statement := `
ALTER TABLE
database_instance
ADD INDEX master_host_port_idx (master_host, master_port)
`
result := stripSpaces(ToSqlite3Dialect(statement))
test.S(t).ExpectEquals(result, stripSpaces(`
create index
master_host_port_idx_database_instance
on database_instance (master_host, master_port)
`))
}
{
statement := `
ALTER TABLE
topology_recovery
ADD KEY last_detection_idx (last_detection_id)
`
result := stripSpaces(ToSqlite3Dialect(statement))
test.S(t).ExpectEquals(result, stripSpaces(`
create index
last_detection_idx_topology_recovery
on topology_recovery (last_detection_id)
`))
}
}
func TestCreateIndex(t *testing.T) {
{
statement := `
create index
master_host_port_idx_database_instance
on database_instance (master_host(128), master_port)
`
result := stripSpaces(ToSqlite3Dialect(statement))
test.S(t).ExpectEquals(result, stripSpaces(`
create index
master_host_port_idx_database_instance
on database_instance (master_host, master_port)
`))
}
}
func TestIsInsert(t *testing.T) {
test.S(t).ExpectTrue(IsInsert("insert into t"))
test.S(t).ExpectTrue(IsInsert("insert ignore into t"))
test.S(t).ExpectTrue(IsInsert(`
insert ignore into t
`))
test.S(t).ExpectFalse(IsInsert("where create table t(id int)"))
test.S(t).ExpectFalse(IsInsert("create table t(id int)"))
test.S(t).ExpectTrue(IsInsert(`
insert into
cluster_domain_name (cluster_name, domain_name, last_registered)
values
(?, ?, datetime('now'))
on duplicate key update
domain_name=values(domain_name),
last_registered=values(last_registered)
`))
}
func TestToSqlite3Insert(t *testing.T) {
{
statement := `
insert into
cluster_domain_name (cluster_name, domain_name, last_registered)
values
(?, ?, datetime('now'))
on duplicate key update
domain_name=values(domain_name),
last_registered=values(last_registered)
`
result := stripSpaces(ToSqlite3Dialect(statement))
test.S(t).ExpectEquals(result, stripSpaces(`
replace into
cluster_domain_name (cluster_name, domain_name, last_registered)
values
(?, ?, datetime('now'))
`))
}
}
func TestToSqlite3GeneralConversions(t *testing.T) {
{
statement := "select now()"
result := ToSqlite3Dialect(statement)
test.S(t).ExpectEquals(result, "select datetime('now')")
}
{
statement := "select now() - interval ? second"
result := ToSqlite3Dialect(statement)
test.S(t).ExpectEquals(result, "select datetime('now', printf('-%d second', ?))")
}
{
statement := "select now() + interval ? minute"
result := ToSqlite3Dialect(statement)
test.S(t).ExpectEquals(result, "select datetime('now', printf('+%d minute', ?))")
}
{
statement := "select now() + interval 5 minute"
result := ToSqlite3Dialect(statement)
test.S(t).ExpectEquals(result, "select datetime('now', '+5 minute')")
}
{
statement := "select some_table.some_column + interval ? minute"
result := ToSqlite3Dialect(statement)
test.S(t).ExpectEquals(result, "select datetime(some_table.some_column, printf('+%d minute', ?))")
}
{
statement := "AND master_instance.last_attempted_check <= master_instance.last_seen + interval ? minute"
result := ToSqlite3Dialect(statement)
test.S(t).ExpectEquals(result, "AND master_instance.last_attempted_check <= datetime(master_instance.last_seen, printf('+%d minute', ?))")
}
{
statement := "select concat(master_instance.port, '') as port"
result := ToSqlite3Dialect(statement)
test.S(t).ExpectEquals(result, "select (master_instance.port || '') as port")
}
{
statement := "select concat( 'abc' , 'def') as s"
result := ToSqlite3Dialect(statement)
test.S(t).ExpectEquals(result, "select ('abc' || 'def') as s")
}
{
statement := "select concat( 'abc' , 'def', last.col) as s"
result := ToSqlite3Dialect(statement)
test.S(t).ExpectEquals(result, "select ('abc' || 'def' || last.col) as s")
}
{
statement := "select concat(myself.only) as s"
result := ToSqlite3Dialect(statement)
test.S(t).ExpectEquals(result, "select concat(myself.only) as s")
}
{
statement := "select concat(1, '2', 3, '4') as s"
result := ToSqlite3Dialect(statement)
test.S(t).ExpectEquals(result, "select concat(1, '2', 3, '4') as s")
}
{
statement := "select group_concat( 'abc' , 'def') as s"
result := ToSqlite3Dialect(statement)
test.S(t).ExpectEquals(result, "select group_concat( 'abc' , 'def') as s")
}
}

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/*
Copyright 2014 Outbrain Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package sqlutils
import (
"database/sql"
"encoding/json"
"errors"
"fmt"
"strconv"
"strings"
"sync"
"time"
"github.com/openark/golib/log"
)
const DateTimeFormat = "2006-01-02 15:04:05.999999"
// RowMap represents one row in a result set. Its objective is to allow
// for easy, typed getters by column name.
type RowMap map[string]CellData
// Cell data is the result of a single (atomic) column in a single row
type CellData sql.NullString
func (this *CellData) MarshalJSON() ([]byte, error) {
if this.Valid {
return json.Marshal(this.String)
} else {
return json.Marshal(nil)
}
}
// UnmarshalJSON reds this object from JSON
func (this *CellData) UnmarshalJSON(b []byte) error {
var s string
if err := json.Unmarshal(b, &s); err != nil {
return err
}
(*this).String = s
(*this).Valid = true
return nil
}
func (this *CellData) NullString() *sql.NullString {
return (*sql.NullString)(this)
}
// RowData is the result of a single row, in positioned array format
type RowData []CellData
// MarshalJSON will marshal this map as JSON
func (this *RowData) MarshalJSON() ([]byte, error) {
cells := make([](*CellData), len(*this), len(*this))
for i, val := range *this {
d := CellData(val)
cells[i] = &d
}
return json.Marshal(cells)
}
func (this *RowData) Args() []interface{} {
result := make([]interface{}, len(*this))
for i := range *this {
result[i] = (*(*this)[i].NullString())
}
return result
}
// ResultData is an ordered row set of RowData
type ResultData []RowData
type NamedResultData struct {
Columns []string
Data ResultData
}
var EmptyResultData = ResultData{}
func (this *RowMap) GetString(key string) string {
return (*this)[key].String
}
// GetStringD returns a string from the map, or a default value if the key does not exist
func (this *RowMap) GetStringD(key string, def string) string {
if cell, ok := (*this)[key]; ok {
return cell.String
}
return def
}
func (this *RowMap) GetInt64(key string) int64 {
res, _ := strconv.ParseInt(this.GetString(key), 10, 0)
return res
}
func (this *RowMap) GetNullInt64(key string) sql.NullInt64 {
i, err := strconv.ParseInt(this.GetString(key), 10, 0)
if err == nil {
return sql.NullInt64{Int64: i, Valid: true}
} else {
return sql.NullInt64{Valid: false}
}
}
func (this *RowMap) GetInt(key string) int {
res, _ := strconv.Atoi(this.GetString(key))
return res
}
func (this *RowMap) GetIntD(key string, def int) int {
res, err := strconv.Atoi(this.GetString(key))
if err != nil {
return def
}
return res
}
func (this *RowMap) GetUint(key string) uint {
res, _ := strconv.ParseUint(this.GetString(key), 10, 0)
return uint(res)
}
func (this *RowMap) GetUintD(key string, def uint) uint {
res, err := strconv.Atoi(this.GetString(key))
if err != nil {
return def
}
return uint(res)
}
func (this *RowMap) GetUint64(key string) uint64 {
res, _ := strconv.ParseUint(this.GetString(key), 10, 0)
return res
}
func (this *RowMap) GetUint64D(key string, def uint64) uint64 {
res, err := strconv.ParseUint(this.GetString(key), 10, 0)
if err != nil {
return def
}
return uint64(res)
}
func (this *RowMap) GetBool(key string) bool {
return this.GetInt(key) != 0
}
func (this *RowMap) GetTime(key string) time.Time {
if t, err := time.Parse(DateTimeFormat, this.GetString(key)); err == nil {
return t
}
return time.Time{}
}
// knownDBs is a DB cache by uri
var knownDBs map[string]*sql.DB = make(map[string]*sql.DB)
var knownDBsMutex = &sync.Mutex{}
// GetDB returns a DB instance based on uri.
// bool result indicates whether the DB was returned from cache; err
func GetGenericDB(driverName, dataSourceName string) (*sql.DB, bool, error) {
knownDBsMutex.Lock()
defer func() {
knownDBsMutex.Unlock()
}()
var exists bool
if _, exists = knownDBs[dataSourceName]; !exists {
if db, err := sql.Open(driverName, dataSourceName); err == nil {
knownDBs[dataSourceName] = db
} else {
return db, exists, err
}
}
return knownDBs[dataSourceName], exists, nil
}
// GetDB returns a MySQL DB instance based on uri.
// bool result indicates whether the DB was returned from cache; err
func GetDB(mysql_uri string) (*sql.DB, bool, error) {
return GetGenericDB("mysql", mysql_uri)
}
// GetDB returns a SQLite DB instance based on DB file name.
// bool result indicates whether the DB was returned from cache; err
func GetSQLiteDB(dbFile string) (*sql.DB, bool, error) {
return GetGenericDB("sqlite3", dbFile)
}
// RowToArray is a convenience function, typically not called directly, which maps a
// single read database row into a NullString
func RowToArray(rows *sql.Rows, columns []string) []CellData {
buff := make([]interface{}, len(columns))
data := make([]CellData, len(columns))
for i, _ := range buff {
buff[i] = data[i].NullString()
}
rows.Scan(buff...)
return data
}
// ScanRowsToArrays is a convenience function, typically not called directly, which maps rows
// already read from the databse into arrays of NullString
func ScanRowsToArrays(rows *sql.Rows, on_row func([]CellData) error) error {
columns, _ := rows.Columns()
for rows.Next() {
arr := RowToArray(rows, columns)
err := on_row(arr)
if err != nil {
return err
}
}
return nil
}
func rowToMap(row []CellData, columns []string) map[string]CellData {
m := make(map[string]CellData)
for k, data_col := range row {
m[columns[k]] = data_col
}
return m
}
// ScanRowsToMaps is a convenience function, typically not called directly, which maps rows
// already read from the databse into RowMap entries.
func ScanRowsToMaps(rows *sql.Rows, on_row func(RowMap) error) error {
columns, _ := rows.Columns()
err := ScanRowsToArrays(rows, func(arr []CellData) error {
m := rowToMap(arr, columns)
err := on_row(m)
if err != nil {
return err
}
return nil
})
return err
}
// QueryRowsMap is a convenience function allowing querying a result set while poviding a callback
// function activated per read row.
func QueryRowsMap(db *sql.DB, query string, on_row func(RowMap) error, args ...interface{}) (err error) {
defer func() {
if derr := recover(); derr != nil {
err = fmt.Errorf("QueryRowsMap unexpected error: %+v", derr)
}
}()
var rows *sql.Rows
rows, err = db.Query(query, args...)
if rows != nil {
defer rows.Close()
}
if err != nil && err != sql.ErrNoRows {
return log.Errore(err)
}
err = ScanRowsToMaps(rows, on_row)
return
}
// queryResultData returns a raw array of rows for a given query, optionally reading and returning column names
func queryResultData(db *sql.DB, query string, retrieveColumns bool, args ...interface{}) (resultData ResultData, columns []string, err error) {
defer func() {
if derr := recover(); derr != nil {
err = errors.New(fmt.Sprintf("QueryRowsMap unexpected error: %+v", derr))
}
}()
var rows *sql.Rows
rows, err = db.Query(query, args...)
defer rows.Close()
if err != nil && err != sql.ErrNoRows {
return EmptyResultData, columns, err
}
if retrieveColumns {
// Don't pay if you don't want to
columns, _ = rows.Columns()
}
resultData = ResultData{}
err = ScanRowsToArrays(rows, func(rowData []CellData) error {
resultData = append(resultData, rowData)
return nil
})
return resultData, columns, err
}
// QueryResultData returns a raw array of rows
func QueryResultData(db *sql.DB, query string, args ...interface{}) (ResultData, error) {
resultData, _, err := queryResultData(db, query, false, args...)
return resultData, err
}
// QueryResultDataNamed returns a raw array of rows, with column names
func QueryNamedResultData(db *sql.DB, query string, args ...interface{}) (NamedResultData, error) {
resultData, columns, err := queryResultData(db, query, true, args...)
return NamedResultData{Columns: columns, Data: resultData}, err
}
// QueryRowsMapBuffered reads data from the database into a buffer, and only then applies the given function per row.
// This allows the application to take its time with processing the data, albeit consuming as much memory as required by
// the result set.
func QueryRowsMapBuffered(db *sql.DB, query string, on_row func(RowMap) error, args ...interface{}) error {
resultData, columns, err := queryResultData(db, query, true, args...)
if err != nil {
// Already logged
return err
}
for _, row := range resultData {
err = on_row(rowToMap(row, columns))
if err != nil {
return err
}
}
return nil
}
// ExecNoPrepare executes given query using given args on given DB, without using prepared statements.
func ExecNoPrepare(db *sql.DB, query string, args ...interface{}) (res sql.Result, err error) {
defer func() {
if derr := recover(); derr != nil {
err = errors.New(fmt.Sprintf("ExecNoPrepare unexpected error: %+v", derr))
}
}()
res, err = db.Exec(query, args...)
if err != nil {
log.Errore(err)
}
return res, err
}
// ExecQuery executes given query using given args on given DB. It will safele prepare, execute and close
// the statement.
func execInternal(silent bool, db *sql.DB, query string, args ...interface{}) (res sql.Result, err error) {
defer func() {
if derr := recover(); derr != nil {
err = errors.New(fmt.Sprintf("execInternal unexpected error: %+v", derr))
}
}()
var stmt *sql.Stmt
stmt, err = db.Prepare(query)
if err != nil {
return nil, err
}
defer stmt.Close()
res, err = stmt.Exec(args...)
if err != nil && !silent {
log.Errore(err)
}
return res, err
}
// Exec executes given query using given args on given DB. It will safele prepare, execute and close
// the statement.
func Exec(db *sql.DB, query string, args ...interface{}) (sql.Result, error) {
return execInternal(false, db, query, args...)
}
// ExecSilently acts like Exec but does not report any error
func ExecSilently(db *sql.DB, query string, args ...interface{}) (sql.Result, error) {
return execInternal(true, db, query, args...)
}
func InClauseStringValues(terms []string) string {
quoted := []string{}
for _, s := range terms {
quoted = append(quoted, fmt.Sprintf("'%s'", strings.Replace(s, ",", "''", -1)))
}
return strings.Join(quoted, ", ")
}
// Convert variable length arguments into arguments array
func Args(args ...interface{}) []interface{} {
return args
}
func NilIfZero(i int64) interface{} {
if i == 0 {
return nil
}
return i
}
func ScanTable(db *sql.DB, tableName string) (NamedResultData, error) {
query := fmt.Sprintf("select * from %s", tableName)
return QueryNamedResultData(db, query)
}
func WriteTable(db *sql.DB, tableName string, data NamedResultData) (err error) {
if len(data.Data) == 0 {
return nil
}
if len(data.Columns) == 0 {
return nil
}
placeholders := make([]string, len(data.Columns))
for i := range placeholders {
placeholders[i] = "?"
}
query := fmt.Sprintf(
`replace into %s (%s) values (%s)`,
tableName,
strings.Join(data.Columns, ","),
strings.Join(placeholders, ","),
)
for _, rowData := range data.Data {
if _, execErr := db.Exec(query, rowData.Args()...); execErr != nil {
err = execErr
}
}
return err
}

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package tests
import (
"testing"
)
// Spec is an access point to test Expections
type Spec struct {
t *testing.T
}
// S generates a spec. You will want to use it once in a test file, once in a test or once per each check
func S(t *testing.T) *Spec {
return &Spec{t: t}
}
// ExpectNil expects given value to be nil, or errors
func (spec *Spec) ExpectNil(actual interface{}) {
if actual == nil {
return
}
spec.t.Errorf("Expected %+v to be nil", actual)
}
// ExpectNotNil expects given value to be not nil, or errors
func (spec *Spec) ExpectNotNil(actual interface{}) {
if actual != nil {
return
}
spec.t.Errorf("Expected %+v to be not nil", actual)
}
// ExpectEquals expects given values to be equal (comparison via `==`), or errors
func (spec *Spec) ExpectEquals(actual, value interface{}) {
if actual == value {
return
}
spec.t.Errorf("Expected:\n[[[%+v]]]\n- got:\n[[[%+v]]]", value, actual)
}
// ExpectNotEquals expects given values to be nonequal (comparison via `==`), or errors
func (spec *Spec) ExpectNotEquals(actual, value interface{}) {
if !(actual == value) {
return
}
spec.t.Errorf("Expected not %+v", value)
}
// ExpectEqualsAny expects given actual to equal (comparison via `==`) at least one of given values, or errors
func (spec *Spec) ExpectEqualsAny(actual interface{}, values ...interface{}) {
for _, value := range values {
if actual == value {
return
}
}
spec.t.Errorf("Expected %+v to equal any of given values", actual)
}
// ExpectNotEqualsAny expects given actual to be nonequal (comparison via `==`)tp any of given values, or errors
func (spec *Spec) ExpectNotEqualsAny(actual interface{}, values ...interface{}) {
for _, value := range values {
if actual == value {
spec.t.Errorf("Expected not %+v", value)
}
}
}
// ExpectFalse expects given values to be false, or errors
func (spec *Spec) ExpectFalse(actual interface{}) {
spec.ExpectEquals(actual, false)
}
// ExpectTrue expects given values to be true, or errors
func (spec *Spec) ExpectTrue(actual interface{}) {
spec.ExpectEquals(actual, true)
}

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/*
Copyright 2015 Shlomi Noach.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package util
import (
"errors"
"fmt"
"regexp"
"strconv"
"strings"
)
const (
TabulateLeft = 0
TabulateRight = 1
)
// ParseSimpleTime parses input in the format 7s, 55m, 3h, 31d, 4w (second, minute, hour, day, week)
// The time.ParseDuration() function should have done this, but it does not support "d" and "w" extensions.
func SimpleTimeToSeconds(simpleTime string) (int, error) {
if matched, _ := regexp.MatchString("^[0-9]+s$", simpleTime); matched {
i, _ := strconv.Atoi(simpleTime[0 : len(simpleTime)-1])
return i, nil
}
if matched, _ := regexp.MatchString("^[0-9]+m$", simpleTime); matched {
i, _ := strconv.Atoi(simpleTime[0 : len(simpleTime)-1])
return i * 60, nil
}
if matched, _ := regexp.MatchString("^[0-9]+h$", simpleTime); matched {
i, _ := strconv.Atoi(simpleTime[0 : len(simpleTime)-1])
return i * 60 * 60, nil
}
if matched, _ := regexp.MatchString("^[0-9]+d$", simpleTime); matched {
i, _ := strconv.Atoi(simpleTime[0 : len(simpleTime)-1])
return i * 60 * 60 * 24, nil
}
if matched, _ := regexp.MatchString("^[0-9]+w$", simpleTime); matched {
i, _ := strconv.Atoi(simpleTime[0 : len(simpleTime)-1])
return i * 60 * 60 * 24 * 7, nil
}
return 0, errors.New(fmt.Sprintf("Cannot parse simple time: %s", simpleTime))
}
func Tabulate(lines []string, separator string, outputSeparator string, directionFlags ...int) (result []string) {
tokens := make([][]string, 0)
widths := make([][]int, 0)
countColumns := 0
for _, line := range lines {
lineTokens := strings.Split(line, separator)
lineWidths := make([]int, len(lineTokens))
for i := range lineTokens {
lineWidths[i] = len(lineTokens[i])
}
tokens = append(tokens, lineTokens)
widths = append(widths, lineWidths)
if len(lineTokens) > countColumns {
countColumns = len(lineTokens)
}
}
columnWidths := make([]int, countColumns)
for _, lineTokens := range tokens {
for col, token := range lineTokens {
if len(token) > columnWidths[col] {
columnWidths[col] = len(token)
}
}
}
for _, lineTokens := range tokens {
resultRow := ""
for col := 0; col < countColumns; col++ {
token := ""
if col < len(lineTokens) {
token = lineTokens[col]
}
format := fmt.Sprintf("%%-%ds", columnWidths[col]) // format left
if col < len(directionFlags) && directionFlags[col] == TabulateRight {
format = fmt.Sprintf("%%%ds", columnWidths[col])
}
formattedToken := fmt.Sprintf(format, token)
if col == 0 {
resultRow = formattedToken
} else {
resultRow = fmt.Sprintf("%s%s%s", resultRow, outputSeparator, formattedToken)
}
}
result = append(result, resultRow)
}
return result
}

88
vendor/github.com/openark/golib/util/text_test.go generated vendored Normal file
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@ -0,0 +1,88 @@
/*
Copyright 2014 Outbrain Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package util
import (
"reflect"
"strings"
"testing"
test "github.com/openark/golib/tests"
)
func init() {
}
func TestTabulate(t *testing.T) {
{
text := strings.TrimSpace(`
a,b,c
d,e,f
g,h,i
`)
tabulated := Tabulate(strings.Split(text, "\n"), ",", ",")
expected := strings.Split(text, "\n")
test.S(t).ExpectTrue(reflect.DeepEqual(tabulated, expected))
}
{
text := strings.TrimSpace(`
a,b,c
d,e,f
g,h,i
`)
tabulated := Tabulate(strings.Split(text, "\n"), ",", "|")
expected := []string{
"a|b|c",
"d|e|f",
"g|h|i",
}
test.S(t).ExpectTrue(reflect.DeepEqual(tabulated, expected))
}
{
text := strings.TrimSpace(`
a,20,c
d,e,100
0000,h,i
`)
tabulated := Tabulate(strings.Split(text, "\n"), ",", "|")
expected := []string{
"a |20|c ",
"d |e |100",
"0000|h |i ",
}
test.S(t).ExpectTrue(reflect.DeepEqual(tabulated, expected))
}
{
text := strings.TrimSpace(`
a,20,c
d,1,100
0000,3,i
`)
tabulated := Tabulate(strings.Split(text, "\n"), ",", "|", TabulateLeft, TabulateRight, TabulateRight)
expected := []string{
"a |20| c",
"d | 1|100",
"0000| 3| i",
}
test.S(t).ExpectTrue(reflect.DeepEqual(tabulated, expected))
}
}