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struct instead of int within signal chan, and trans Printf to Println

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Signed-off-by: yuzhiquan <yuzhiquanlong@gmail.com>
This commit is contained in:
yuzhiquan 2020-05-14 18:20:32 +08:00 committed by Ziming
parent 995f0be804
commit 6332daef31
1 changed files with 6 additions and 6 deletions
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12
src/cmd/migrate-patch/main.go
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@ -33,14 +33,14 @@ func main() {
log.Fatalf("Failed to connect to Database, error: %v\n", err) log.Fatalf("Failed to connect to Database, error: %v\n", err)
} }
defer db.Close() defer db.Close()
c := make(chan int, 1) c := make(chan struct{}, 1)
go func() { go func() {
err := db.Ping() err := db.Ping()
for ; err != nil; err = db.Ping() { for ; err != nil; err = db.Ping() {
log.Printf("Failed to Ping DB, sleep for 1 second.\n") log.Println("Failed to Ping DB, sleep for 1 second.")
time.Sleep(1 * time.Second) time.Sleep(1 * time.Second)
} }
c <- 1 c <- struct{}{}
}() }()
select { select {
case <-c: case <-c:
@ -54,11 +54,11 @@ func main() {
log.Fatalf("Failed to check schema_migrations table, error: %v \n", err) log.Fatalf("Failed to check schema_migrations table, error: %v \n", err)
} }
if tblCount == 0 { if tblCount == 0 {
log.Printf("schema_migrations table does not exist, skip.\n") log.Println("schema_migrations table does not exist, skip.")
return return
} }
if colCount > 0 { if colCount > 0 {
log.Printf("schema_migrations table does not require update, skip.\n") log.Println("schema_migrations table does not require update, skip.")
return return
} }
if _, err := db.Exec(pgSQLDelRows); err != nil { if _, err := db.Exec(pgSQLDelRows); err != nil {
@ -67,5 +67,5 @@ func main() {
if _, err := db.Exec(pgSQLAlterStmt); err != nil { if _, err := db.Exec(pgSQLAlterStmt); err != nil {
log.Fatalf("Failed to update database, error: %v \n", err) log.Fatalf("Failed to update database, error: %v \n", err)
} }
log.Printf("Done updating database. \n") log.Println("Done updating database.")
} }