transactions

DBMS Transaction Management

Commits or roll backs the current transaction in an MySQL connection. Note that in MySQL DDL statements (e.g. CREATE TABLE) can not be rolled back.

Usage

# S4 method for MySQLConnection
dbCommit(conn, ...)
# S4 method for MySQLConnection
dbBegin(conn, ...)
# S4 method for MySQLConnection
dbRollback(conn, ...)

Aliases

• transactions
• dbCommit,MySQLConnection-method
• dbBegin,MySQLConnection-method
• dbRollback,MySQLConnection-method

Examples

# NOT RUN {
if (mysqlHasDefault()) {
con <- dbConnect(RMySQL::MySQL(), dbname = "test")
df <- data.frame(id = 1:5)

dbWriteTable(con, "df", df)
dbBegin(con)
dbGetQuery(con, "UPDATE df SET id = id * 10")
dbGetQuery(con, "SELECT id FROM df")
dbRollback(con)

dbGetQuery(con, "SELECT id FROM df")

dbRemoveTable(con, "df")
dbDisconnect(con)
}
# }