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384 lines (333 loc) · 10.9 KB
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lexer = require('../lib/lexer')
parser = require("../lib/parser")
parse = (query) ->
parser.parse(lexer.tokenize(query))
describe "SQL Grammar", ->
describe "SELECT Queries", ->
it "parses ORDER BY clauses", ->
parse("SELECT * FROM my_table ORDER BY x DESC").toString().should.eql """
SELECT *
FROM `my_table`
ORDER BY `x` DESC
"""
it "parses ORDER BY clauses with OFFSET n ROWS", ->
parse("SELECT * FROM my_table ORDER BY x DESC OFFSET 10 ROWS").toString().should.eql """
SELECT *
FROM `my_table`
ORDER BY `x` DESC
OFFSET 10 ROWS
"""
it "parses ORDER BY clauses with OFFSET n ROW", ->
parse("SELECT * FROM my_table ORDER BY x DESC OFFSET 10 ROW").toString().should.eql """
SELECT *
FROM `my_table`
ORDER BY `x` DESC
OFFSET 10 ROWS
"""
it "parses ORDER BY clauses with OFFSET n ROW FETCH FIRST n ONLY", ->
parse("SELECT * FROM my_table ORDER BY x DESC OFFSET 10 ROW FETCH FIRST 15 ROW ONLY").toString().should.eql """
SELECT *
FROM `my_table`
ORDER BY `x` DESC
OFFSET 10 ROWS
FETCH NEXT 15 ROWS ONLY
"""
it "parses ORDER BY clauses with OFFSET n ROW FETCH NEXT n ONLY", ->
parse("SELECT * FROM my_table ORDER BY x DESC OFFSET 10 ROW FETCH NEXT 15 ROWS ONLY").toString().should.eql """
SELECT *
FROM `my_table`
ORDER BY `x` DESC
OFFSET 10 ROWS
FETCH NEXT 15 ROWS ONLY
"""
it "parses GROUP BY clauses", ->
parse("SELECT * FROM my_table GROUP BY x, y").toString().should.eql """
SELECT *
FROM `my_table`
GROUP BY `x`, `y`
"""
it "parses LIMIT clauses", ->
parse("SELECT * FROM my_table LIMIT 10").toString().should.eql """
SELECT *
FROM `my_table`
LIMIT 10
"""
it "parses LIMIT clauses after ORDER BY", ->
parse("SELECT * FROM my_table ORDER BY cat DESC LIMIT 10").toString().should.eql """
SELECT *
FROM `my_table`
ORDER BY `cat` DESC
LIMIT 10
"""
it "parses LIMIT clauses with comma separated offset", ->
parse("SELECT * FROM my_table LIMIT 30, 10").toString().should.eql """
SELECT *
FROM `my_table`
LIMIT 10
OFFSET 30
"""
it "parses LIMIT clauses with OFFSET keyword", ->
parse("SELECT * FROM my_table LIMIT 10 OFFSET 30").toString().should.eql """
SELECT *
FROM `my_table`
LIMIT 10
OFFSET 30
"""
it "parses SELECTs with FUNCTIONs without arguments", ->
parse("SELECT X(Y(Z())) FROM X").toString().should.eql """
SELECT X(Y(Z()))
FROM `X`
"""
it "parses SELECTs with FUNCTIONs", ->
parse("SELECT a, COUNT(1, b) FROM my_table LIMIT 10").toString().should.eql """
SELECT `a`, COUNT(1, `b`)
FROM `my_table`
LIMIT 10
"""
it "parses COUNT(DISTINCT field)", ->
parse("select a, count(distinct b) FROM my_table limit 10").toString().should.eql """
SELECT `a`, COUNT(DISTINCT `b`)
FROM `my_table`
LIMIT 10
"""
it "parses WHERE clauses", ->
parse("SELECT * FROM my_table WHERE x > 1 AND y = 'foo'").toString().should.eql """
SELECT *
FROM `my_table`
WHERE ((`x` > 1) AND (`y` = 'foo'))
"""
it "parses complex WHERE clauses", ->
parse("SELECT * FROM my_table WHERE a > 10 AND (a < 30 OR b = 'c')").toString().should.eql """
SELECT *
FROM `my_table`
WHERE ((`a` > 10) AND ((`a` < 30) OR (`b` = 'c')))
"""
it "parses WHERE clauses with BETWEEN operator", ->
parse("SELECT * FROM my_table WHERE a > 10 AND b BETWEEN 4 AND 6 AND c = 4").toString().should.eql """
SELECT *
FROM `my_table`
WHERE (((`a` > 10) AND (`b` BETWEEN 4 AND 6)) AND (`c` = 4))
"""
it "parses WHERE with ORDER BY clauses", ->
parse("SELECT * FROM my_table WHERE x > 1 ORDER BY y").toString().should.eql """
SELECT *
FROM `my_table`
WHERE (`x` > 1)
ORDER BY `y` ASC
"""
it "parses WHERE with multiple ORDER BY clauses", ->
parse("SELECT * FROM my_table WHERE x > 1 ORDER BY x, y DESC").toString().should.eql """
SELECT *
FROM `my_table`
WHERE (`x` > 1)
ORDER BY `x` ASC, `y` DESC
"""
it "parses WHERE with ORDER BY clauses with direction", ->
parse("SELECT * FROM my_table WHERE x > 1 ORDER BY y ASC").toString().should.eql """
SELECT *
FROM `my_table`
WHERE (`x` > 1)
ORDER BY `y` ASC
"""
it "parses WHERE with GROUP BY clauses", ->
parse("SELECT * FROM my_table WHERE x > 1 GROUP BY x, y").toString().should.eql """
SELECT *
FROM `my_table`
WHERE (`x` > 1)
GROUP BY `x`, `y`
"""
it "parses WHERE with GROUP BY and ORDER BY clauses", ->
parse("SELECT * FROM my_table WHERE x > 1 GROUP BY x, y ORDER BY COUNT(y) ASC").toString().should.eql """
SELECT *
FROM `my_table`
WHERE (`x` > 1)
GROUP BY `x`, `y`
ORDER BY COUNT(`y`) ASC
"""
it "parses GROUP BY and HAVING clauses", ->
parse("SELECT * FROM my_table GROUP BY x, y HAVING COUNT(`y`) > 1").toString().should.eql """
SELECT *
FROM `my_table`
GROUP BY `x`, `y`
HAVING (COUNT(`y`) > 1)
"""
it "parses UDFs", ->
parse("SELECT LENGTH(a) FROM my_table").toString().should.eql """
SELECT LENGTH(`a`)
FROM `my_table`
"""
it "parses expressions in place of fields", ->
parse("SELECT f+LENGTH(f)/3 AS f1 FROM my_table").toString().should.eql """
SELECT (`f` + (LENGTH(`f`) / 3)) AS `f1`
FROM `my_table`
"""
it "supports booleans", ->
parse("SELECT null FROM my_table WHERE a = true").toString().should.eql """
SELECT NULL
FROM `my_table`
WHERE (`a` = TRUE)
"""
it "supports IS and IS NOT", ->
parse("SELECT * FROM my_table WHERE a IS NULL AND b IS NOT NULL").toString().should.eql """
SELECT *
FROM `my_table`
WHERE ((`a` IS NULL) AND (`b` IS NOT NULL))
"""
it "supports nested expressions", ->
parse("SELECT * FROM my_table WHERE MOD(LENGTH(a) + LENGTH(b), c)").toString().should.eql """
SELECT *
FROM `my_table`
WHERE MOD((LENGTH(`a`) + LENGTH(`b`)), `c`)
"""
it "supports nested fields using dot syntax", ->
parse("SELECT a.b.c FROM my_table WHERE a.b > 2").toString().should.eql """
SELECT `a.b.c`
FROM `my_table`
WHERE (`a.b` > 2)
"""
it "supports time window extensions", ->
parse("SELECT * FROM my_table.win:length(123)").toString().should.eql """
SELECT *
FROM `my_table`.win:length(123)
"""
it "parses sub selects", ->
parse("select * from (select * from my_table)").toString().should.eql """
SELECT *
FROM (
SELECT *
FROM `my_table`
)
"""
it "parses named sub selects", ->
parse("select * from (select * from my_table) t").toString().should.eql """
SELECT *
FROM (
SELECT *
FROM `my_table`
) `t`
"""
it "parses single joins", ->
parse("select * from a join b on a.id = b.id").toString().should.eql """
SELECT *
FROM `a`
JOIN `b`
ON (`a.id` = `b.id`)
"""
it "parses right outer joins", ->
parse("select * from a right outer join b on a.id = b.id").toString().should.eql """
SELECT *
FROM `a`
RIGHT OUTER JOIN `b`
ON (`a.id` = `b.id`)
"""
it "parses multiple joins", ->
parse("select * from a join b on a.id = b.id join c on a.id = c.id").toString().should.eql """
SELECT *
FROM `a`
JOIN `b`
ON (`a.id` = `b.id`)
JOIN `c`
ON (`a.id` = `c.id`)
"""
it "parses UNIONs", ->
parse("select * from a union select * from b").toString().should.eql """
SELECT *
FROM `a`
UNION
SELECT *
FROM `b`
"""
it "parses UNION ALL", ->
parse("select * from a union all select * from b").toString().should.eql """
SELECT *
FROM `a`
UNION ALL
SELECT *
FROM `b`
"""
describe "string quoting", ->
it "doesn't choke on escaped quotes", ->
parse("select * from a where foo = 'I\\'m'").toString().should.eql """
SELECT *
FROM `a`
WHERE (`foo` = 'I\\'m')
"""
it "allows using double quotes", ->
parse('select * from a where foo = "a"').toString().should.eql """
SELECT *
FROM `a`
WHERE (`foo` = "a")
"""
it "allows nesting different quote styles", ->
parse("""select * from a where foo = "I'm" """).toString().should.eql """
SELECT *
FROM `a`
WHERE (`foo` = "I'm")
"""
describe "subselect clauses", ->
it "parses a subselect field", ->
parse("""select (select x from y) from a""").toString().should.eql """
SELECT (
SELECT `x`
FROM `y`
)
FROM `a`
"""
it "parses an IN clause containing a list", ->
parse("""select * from a where x in (1,2,3)""").toString().should.eql """
SELECT *
FROM `a`
WHERE (`x` IN (1, 2, 3))
"""
it "parses an IN clause containing a query", ->
parse("""select * from a where x in (select foo from bar)""").toString().should.eql """
SELECT *
FROM `a`
WHERE (`x` IN (
SELECT `foo`
FROM `bar`
))
"""
it "parses a NOT IN clause containing a query", ->
parse("""select * from a where x not in (select foo from bar)""").toString().should.eql """
SELECT *
FROM `a`
WHERE (`x` NOT IN (
SELECT `foo`
FROM `bar`
))
"""
it "parses an EXISTS clause containing a query", ->
parse("""select * from a where exists (select foo from bar)""").toString().should.eql """
SELECT *
FROM `a`
WHERE (EXISTS (
SELECT `foo`
FROM `bar`
))
"""
describe "aliases", ->
it "parses aliased table names", ->
parse("""select * from a b""").toString().should.eql """
SELECT *
FROM `a` AS `b`
"""
it "parses aliased table names with as", ->
parse("""select * from a as b""").toString().should.eql """
SELECT *
FROM `a` AS `b`
"""
describe "STARS", ->
it "parses stars as multiplication", ->
parse('SELECT * FROM foo WHERE a = 1*2').toString().should.eql """
SELECT *
FROM `foo`
WHERE (`a` = (1 * 2))
"""
describe "Parameters", ->
it "parses query parameters", ->
parse('select * from foo where bar = $12').toString().should.eql """
SELECT *
FROM `foo`
WHERE (`bar` = $12)
"""