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# print method doesn't change unexpectedly
Code
left_join(lf1, lf2, by = "x") %>% left_join(lf3, by = "x") %>% sql_build()
Output
<SQL JOINS>
X:
<table_path> `lf1`
Type: left
By:
x-x
Y:
<table_path> `lf2`
Type: left
By:
x-x
Y:
<table_path> `lf3`
# generated sql doesn't change unexpectedly
Code
inner_join(lf, lf)
Message
Joining with `by = join_by(x, y)`
Output
<SQL>
SELECT `df_LHS`.*
FROM `df` AS `df_LHS`
INNER JOIN `df` AS `df_RHS`
ON (`df_LHS`.`x` = `df_RHS`.`x` AND `df_LHS`.`y` = `df_RHS`.`y`)
---
Code
left_join(lf, lf)
Message
Joining with `by = join_by(x, y)`
Output
<SQL>
SELECT `df_LHS`.*
FROM `df` AS `df_LHS`
LEFT JOIN `df` AS `df_RHS`
ON (`df_LHS`.`x` = `df_RHS`.`x` AND `df_LHS`.`y` = `df_RHS`.`y`)
---
Code
right_join(lf, lf)
Message
Joining with `by = join_by(x, y)`
Output
<SQL>
SELECT `df_RHS`.*
FROM `df` AS `df_LHS`
RIGHT JOIN `df` AS `df_RHS`
ON (`df_LHS`.`x` = `df_RHS`.`x` AND `df_LHS`.`y` = `df_RHS`.`y`)
---
Code
full_join(lf, lf)
Message
Joining with `by = join_by(x, y)`
Output
<SQL>
SELECT
COALESCE(`df_LHS`.`x`, `df_RHS`.`x`) AS `x`,
COALESCE(`df_LHS`.`y`, `df_RHS`.`y`) AS `y`
FROM `df` AS `df_LHS`
FULL JOIN `df` AS `df_RHS`
ON (`df_LHS`.`x` = `df_RHS`.`x` AND `df_LHS`.`y` = `df_RHS`.`y`)
# only disambiguates shared variables
Code
left_join(lf1, lf2)
Message
Joining with `by = join_by(x)`
Output
<SQL>
SELECT `df_LHS`.*, `z`
FROM `df` AS `df_LHS`
LEFT JOIN `df` AS `df_RHS`
ON (`df_LHS`.`x` = `df_RHS`.`x`)
---
Code
left_join(lf1, lf2, by = c(y = "z"))
Output
<SQL>
SELECT `df_LHS`.`x` AS `x.x`, `y`, `df_RHS`.`x` AS `x.y`
FROM `df` AS `df_LHS`
LEFT JOIN `df` AS `df_RHS`
ON (`df_LHS`.`y` = `df_RHS`.`z`)
# disambiguate variables that only differ in case
Code
left_join(lf1, lf2, by = "y")
Output
<SQL>
SELECT `df_LHS`.*, `df_RHS`.`X` AS `X`
FROM `df` AS `df_LHS`
LEFT JOIN `df` AS `df_RHS`
ON (`df_LHS`.`y` = `df_RHS`.`y`)
---
Code
full_join(lf1, lf2, by = "y")
Output
<SQL>
SELECT
`df_LHS`.`x` AS `x`,
COALESCE(`df_LHS`.`y`, `df_RHS`.`y`) AS `y`,
`df_RHS`.`X` AS `X`
FROM `df` AS `df_LHS`
FULL JOIN `df` AS `df_RHS`
ON (`df_LHS`.`y` = `df_RHS`.`y`)
# sql_on query doesn't change unexpectedly
Code
inner_join(lf1, lf2, sql_on = "LHS.y < RHS.z")
Output
<SQL>
SELECT `LHS`.`x` AS `x.x`, `y`, `RHS`.`x` AS `x.y`, `z`
FROM `df` AS `LHS`
INNER JOIN `df` AS `RHS`
ON (LHS.y < RHS.z)
---
Code
left_join(lf1, lf2, sql_on = "LHS.y < RHS.z")
Output
<SQL>
SELECT `LHS`.`x` AS `x.x`, `y`, `RHS`.`x` AS `x.y`, `z`
FROM `df` AS `LHS`
LEFT JOIN `df` AS `RHS`
ON (LHS.y < RHS.z)
---
Code
right_join(lf1, lf2, sql_on = "LHS.y < RHS.z")
Output
<SQL>
SELECT `LHS`.`x` AS `x.x`, `y`, `RHS`.`x` AS `x.y`, `z`
FROM `df` AS `LHS`
RIGHT JOIN `df` AS `RHS`
ON (LHS.y < RHS.z)
---
Code
full_join(lf1, lf2, sql_on = "LHS.y < RHS.z")
Output
<SQL>
SELECT `LHS`.`x` AS `x.x`, `y`, `RHS`.`x` AS `x.y`, `z`
FROM `df` AS `LHS`
FULL JOIN `df` AS `RHS`
ON (LHS.y < RHS.z)
---
Code
semi_join(lf1, lf2, sql_on = "LHS.y < RHS.z")
Output
<SQL>
SELECT `LHS`.*
FROM `df` AS `LHS`
WHERE EXISTS (
SELECT 1 FROM `df` AS `RHS`
WHERE (LHS.y < RHS.z)
)
---
Code
anti_join(lf1, lf2, sql_on = "LHS.y < RHS.z")
Output
<SQL>
SELECT `LHS`.*
FROM `df` AS `LHS`
WHERE NOT EXISTS (
SELECT 1 FROM `df` AS `RHS`
WHERE (LHS.y < RHS.z)
)
|
