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add support for ORDER and LIMIT on UPDATE and DELETE #722

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add support for ORDER and LIMIT on UPDATE and DELETE #722

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8 changes: 6 additions & 2 deletions Sources/SQLite/Typed/Query.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -648,7 +648,9 @@ extension QueryType {
tableName(),
Expression<Void>(literal: "SET"),
", ".join(values.map { " = ".join([$0.column, $0.value]) }),
whereClause
whereClause,
orderClause,
limitOffsetClause
]

return Update(" ".join(clauses.flatMap { $0 }).expression)
Expand All @@ -660,7 +662,9 @@ extension QueryType {
let clauses: [Expressible?] = [
Expression<Void>(literal: "DELETE FROM"),
tableName(),
whereClause
whereClause,
orderClause,
limitOffsetClause
]

return Delete(" ".join(clauses.flatMap { $0 }).expression)
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14 changes: 14 additions & 0 deletions Tests/SQLiteTests/QueryTests.swift
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Expand Up @@ -245,13 +245,27 @@ class QueryTests : XCTestCase {
)
}

func test_update_compilesUpdateLimitOrderExpression() {
AssertSQL(
"UPDATE \"users\" SET \"age\" = 30 ORDER BY \"id\" LIMIT 1",
users.order(id).limit(1).update(age <- 30)
)
}

func test_delete_compilesDeleteExpression() {
AssertSQL(
"DELETE FROM \"users\" WHERE (\"id\" = 1)",
users.filter(id == 1).delete()
)
}

func test_delete_compilesDeleteLimitOrderExpression() {
AssertSQL(
"DELETE FROM \"users\" ORDER BY \"id\" LIMIT 1",
users.order(id).limit(1).delete()
)
}

func test_delete_compilesExistsExpression() {
AssertSQL(
"SELECT EXISTS (SELECT * FROM \"users\")",
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