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// SPDX-License-Identifier: GPL-3.0-or-later
package mysql
import (
"fmt"
"regexp"
"strings"
"github.com/blang/semver/v4"
)
const queryShowVersion = `
SHOW GLOBAL VARIABLES
WHERE
Variable_name LIKE 'version'
OR Variable_name LIKE 'version_comment';`
var reVersionCore = regexp.MustCompile(`^\d+\.\d+\.\d+`)
func (m *MySQL) collectVersion() error {
// https://mariadb.com/kb/en/version/
q := queryShowVersion
m.Debugf("executing query: '%s'", queryShowVersion)
var name, version, versionComment string
_, err := m.collectQuery(q, func(column, value string, _ bool) {
switch column {
case "Variable_name":
name = value
case "Value":
switch name {
case "version":
version = value
case "version_comment":
versionComment = value
}
}
})
if err != nil {
return err
}
m.Infof("application version: '%s', version_comment: '%s'", version, versionComment)
// version string is not always valid semver (ex.: 8.0.22-0ubuntu0.20.04.2)
s := reVersionCore.FindString(version)
if s == "" {
return fmt.Errorf("couldn't parse version string '%s'", version)
}
ver, err := semver.New(s)
if err != nil {
return fmt.Errorf("couldn't parse version string '%s': %v", s, err)
}
m.version = ver
m.isMariaDB = strings.Contains(version, "MariaDB") || strings.Contains(versionComment, "mariadb")
m.isPercona = strings.Contains(versionComment, "Percona")
return nil
}
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