dbplyr (version 2.4.0)

sql_options: Options for generating SQL

Description

Options for generating SQL

Usage

sql_options(cte = FALSE, use_star = TRUE, qualify_all_columns = FALSE)

Value

A <dbplyr_sql_options> object.

Arguments

cte

If FALSE, the default, subqueries are used. If TRUE common table expressions are used.

use_star

If TRUE, the default, * is used to select all columns of a table. If FALSE all columns are explicitly selected.

qualify_all_columns

If FALSE, the default, columns are only qualified with the table they come from if the same column name appears in multiple tables.

Examples

library(dplyr, warn.conflicts = FALSE)
lf1 <- lazy_frame(key = 1, a = 1, b = 2)
lf2 <- lazy_frame(key = 1, a = 1, c = 3)

result <- left_join(lf1, lf2, by = "key") %>%
  filter(c >= 3)

show_query(result)
sql_options <- sql_options(cte = TRUE, qualify_all_columns = TRUE)
show_query(result, sql_options = sql_options)