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94 lines
1.7 KiB
94 lines
1.7 KiB
// +build ignore
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// Generate the table of OID values
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// Run with 'go run gen.go'.
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package main
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import (
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"database/sql"
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"fmt"
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"log"
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"os"
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"os/exec"
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"strings"
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_ "github.com/lib/pq"
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)
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// OID represent a postgres Object Identifier Type.
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type OID struct {
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ID int
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Type string
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}
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// Name returns an upper case version of the oid type.
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func (o OID) Name() string {
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return strings.ToUpper(o.Type)
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}
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func main() {
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datname := os.Getenv("PGDATABASE")
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sslmode := os.Getenv("PGSSLMODE")
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if datname == "" {
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os.Setenv("PGDATABASE", "pqgotest")
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}
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if sslmode == "" {
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os.Setenv("PGSSLMODE", "disable")
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}
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db, err := sql.Open("postgres", "")
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if err != nil {
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log.Fatal(err)
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}
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rows, err := db.Query(`
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SELECT typname, oid
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FROM pg_type WHERE oid < 10000
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ORDER BY oid;
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`)
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if err != nil {
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log.Fatal(err)
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}
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oids := make([]*OID, 0)
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for rows.Next() {
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var oid OID
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if err = rows.Scan(&oid.Type, &oid.ID); err != nil {
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log.Fatal(err)
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}
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oids = append(oids, &oid)
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}
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if err = rows.Err(); err != nil {
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log.Fatal(err)
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}
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cmd := exec.Command("gofmt")
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cmd.Stderr = os.Stderr
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w, err := cmd.StdinPipe()
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if err != nil {
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log.Fatal(err)
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}
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f, err := os.Create("types.go")
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if err != nil {
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log.Fatal(err)
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}
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cmd.Stdout = f
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err = cmd.Start()
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if err != nil {
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log.Fatal(err)
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}
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fmt.Fprintln(w, "// Code generated by gen.go. DO NOT EDIT.")
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fmt.Fprintln(w, "\npackage oid")
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fmt.Fprintln(w, "const (")
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for _, oid := range oids {
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fmt.Fprintf(w, "T_%s Oid = %d\n", oid.Type, oid.ID)
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}
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fmt.Fprintln(w, ")")
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fmt.Fprintln(w, "var TypeName = map[Oid]string{")
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for _, oid := range oids {
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fmt.Fprintf(w, "T_%s: \"%s\",\n", oid.Type, oid.Name())
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}
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fmt.Fprintln(w, "}")
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w.Close()
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cmd.Wait()
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}
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