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91 Zeilen
2.1 KiB
91 Zeilen
2.1 KiB
#' AthenaJDBC
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#'
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#' @export
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setClass("AthenaDriver", representation("JDBCDriver", identifier.quote="character", jdrv="jobjRef"))
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#' AthenaJDBC
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#'
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#' @export
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Athena <- function(identifier.quote='`') {
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drv <- JDBC(driverClass="com.amazonaws.athena.jdbc.AthenaDriver",
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system.file("AthenaJDBC41-1.0.1.jar", package="metis"),
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identifier.quote="'")
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return(as(drv, "AthenaDriver"))
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}
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#' AthenaJDBC
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#'
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#' @export
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setMethod(
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"dbConnect",
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"AthenaDriver",
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def = function(drv,
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provider = "com.amazonaws.athena.jdbc.shaded.com.amazonaws.auth.EnvironmentVariableCredentialsProvider",
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conn_string = 'jdbc:awsathena://athena.us-east-1.amazonaws.com:443/',
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schema_name, ...) {
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if (!is.null(provider)) {
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jc <- callNextMethod(drv, conn_string,
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s3_staging_dir=Sys.getenv("AWS_S3_STAGING_DIR"),
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schema_name=schema_name,
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aws_credentials_provider_class=provider, ...)
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} else {
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jc <- callNextMethod(drv,
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'jdbc:awsathena://athena.us-east-1.amazonaws.com:443/',
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s3_staging_dir=Sys.getenv("AWS_S3_STAGING_DIR"),
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schema_name=schema_name,
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user = Sys.getenv("AWS_ACCESS_KEY_ID"),
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password = Sys.getenv("AWS_SECRET_ACCESS_KEY"))
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}
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return(as(jc, "AthenaConnection"))
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}
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)
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#' AthenaJDBC
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#'
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#' @export
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setClass("AthenaConnection", contains = "JDBCConnection")
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#' AthenaJDBC
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#'
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#' @export
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setClass("AthenaResult", contains = "JDBCResult")
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#' AthenaJDBC
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#'
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#' @export
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setMethod(
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"dbSendQuery",
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"AthenaDriver",
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def = function(conn, statement, ...) {
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return(as(callNextMethod(), "AthenaResult"))
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}
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)
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#' AthenaJDBC
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#'
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#' @export
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setMethod(
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"dbGetQuery",
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signature(conn="AthenaConnection", statement="character"),
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def = function(conn, statement, ...) {
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r <- dbSendQuery(conn, statement, ...)
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on.exit(.jcall(r@stat, "V", "close"))
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dplyr::tbl_df(fetch(r, -1, block=256))
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}
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)
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