powerbiR (version 0.1.0)

pbi_schema_create: Create a Power BI dataset schema

Description

Creates a Power BI dataset schema from a set of data frames. Columns and data types will be inferred from the data frames. Only applicable to push datasets.

Usage

pbi_schema_create(
  dt_list,
  dataset_name = "My Power BI Dataset",
  table_name_list,
  relations_list = NULL,
  date_format = "yyyy-mm-dd",
  integer_format = "#,###0",
  double_format = "#,###.00",
  sort_by_col = NULL,
  hidden_col = NULL,
  default_mode = c("Push", "Streaming", "PushStreaming", "AsOnPrem", "AsAzure")
)

Value

A list with schema properties.

Arguments

dt_list

A list of data frames which the schema should be inferred from.

dataset_name

A custom name of the Power BI dataset.

table_name_list

A list of custom names corresponding to the list of data frames.

relations_list

A list of relation definitions returned by pbi_schema_relation_create()

date_format

The format of date columns (if any). Default is 'yyyy-mm-dd'.

integer_format

The format of integer columns (if any). Default is '#,###0'.

double_format

The format of double columns (if any). Default is '#,###.00'.

sort_by_col

A list of lists of column-sorting definitions. The inner lists must include elements named 'table', 'sort' and 'sort_by'. See example for more details.

hidden_col

A list of lists columns to be hidden. The inner lists must include elements named 'table' and 'hidden'. See examples for more details.

default_mode

The dataset mode or type. Defaults to 'Push'.

Examples

# Load package
library(powerbiR)

# Use data from the powerbiR package
data(dim_hour)
data(fact_visitors)

# Define dataset and its tables
table_list <- list(fact_visitors, dim_hour)
table_names  <- c("visitors", "hour")
dataset_name <- c("Online Visitors")

# Define relations between tables
relation <- pbi_schema_relation_create(
  from_table = "visitors",
  from_column = "hour_key",
  to_table = "hour"
)

# Define sorting behavior of columns in the hour table
sortlist = list(
  table = c("hour"),
  sort = c("hour"),
  sort_by = c("hour_key")
)

# Hide hour_key in the hour and visitors tables
hidden <- list(
  list(
    table = c("hour"),
    hidden = c("hour_key")
  ),
  list(
    table = c("visitors"),
    hidden = c("hour_key", "visitor_id")
  )
)

# Create schema
schema <- pbi_schema_create(
  dt_list = table_list,
  dataset_name = dataset_name,
  table_name_list = table_names,
  relations_list = list(relation),
  sort_by_col = list(sortlist),
  hidden_col = hidden
)