我正在尝试使用dbWriteTable在我的数据库中编写一个表，但是遇到了各种各样的问题。我可能不确定，这可能是由于架构或与Impala的后端连接所致。
我尝试了dbWriteTable命令的几种变体，试图从dbo数据库中的mtcars数据集创建一个名为test cars的新表，但是没有一个起作用。出乎意料的是，尽管我能够成功地使用dbCreateTable从我的数据集中创建一个具有列名的空表。查看下面我尝试过的内容：
library(odbc)
library(implyr)
library(dplyr)
library(DBI)
impala_con <- dbConnect(odbc::odbc(),
Driver = "impala",
Host = "host",
Port = "21050")
#impala_con
#<OdbcConnection> User@Impala
# Database: IMPALA
# Impala Version: 2.11.0-cdh5.14.0
> table_id = DBI::Id(schema = "dbo", name = "test_cars")
> dbWriteTable( impala_con, name=table_id, as.data.frame(data(mtcars)))
Error: Can't unquote `dbo`.`test_cars`
> dbWriteTable( impala_con, name=SQL("dbo.test_cars"), as.data.frame(data(mtcars)))
Error: Can't unquote dbo.test_cars
> dbWriteTable( impala_con, name="dbo.test_cars", mtcars)
Error: <SQL> 'CREATE TABLE `dbo.test_cars` (
`row_names` STRING,
`mpg` DOUBLE,
`cyl` DOUBLE,
`disp` DOUBLE,
`hp` DOUBLE,
`drat` DOUBLE,
`wt` DOUBLE,
`qsec` DOUBLE,
`vs` DOUBLE,
`am` DOUBLE,
`gear` DOUBLE,
`carb` DOUBLE
)
'
nanodbc/nanodbc.cpp:1587: 42000: [Cloudera][ImpalaODBC] (360) Syntax error occurred during query execution: [HY000] : AnalysisException: Invalid table/view name: dbo.test_cars
#The following command creates an empty table with the appropriate columns.
> dbCreateTable( impala_con, SQL("dbo.test_cars"), mtcars)
#There are multiple databases in the system
#Was able to switch to appropriate database and now getting a different error
#As suggested switch database first and then try dbWriteTable
> dbSendQuery(impala_con, paste("use dbo"))
<OdbcResult>
SQL use dbo
ROWS Fetched: 0 [complete]
Changed: 0
> dbWriteTable(impala_con, name="test_cars", mtcars, overwrite=TRUE)
Error: <SQL> 'INSERT INTO `test_cars` (`row_names`, `mpg`, `cyl`, `disp`, `hp`, `drat`, `wt`, `qsec`, `vs`, `am`, `gear`, `carb`)
VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)'
nanodbc/nanodbc.cpp:1587: 42000: [Cloudera][ImpalaODBC] (360) Syntax error occurred during query execution: [HY000] : AnalysisException: Syntax error in line 2:
VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
^
Encountered: Unexpected character
Expected: CASE, CAST, DEFAULT, EXISTS, FALSE, IF, INTERVAL, NOT, NULL, REPLACE, TRUNCATE, TRUE, IDENTIFIER
CAUSED BY: Exception: Syntax error
In addition: Warning message:
In new_result(connection@ptr, statement) : Cancelling previous query
> head(mtcars)
mpg cyl disp hp drat wt qsec vs am gear carb
Mazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4
Mazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4
Datsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1
Hornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1
Hornet Sportabout 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2
Valiant 18.1 6 225 105 2.76 3.460 20.22 1 0 3 1
理想情况下，我想使用dbWriteTable命令将R中的数据集写入数据库，以将表名称为test_car的表写入数据库dbo中。