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Allow INSERT INTO from SELECT

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rbock
2019-04-11 11:30:25 +02:00
parent b27406a87e
commit c729387ab6
3 changed files with 35 additions and 17 deletions
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20
test_serializer/CustomQuery.cpp
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2016-2016, Roland Bock
* Copyright (c) 2016-2019, Roland Bock
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
@@ -31,15 +31,16 @@
SQLPP_ALIAS_PROVIDER(pragma)
int CustomQuery(int, char* [])
int CustomQuery(int, char*[])
{
const auto foo = test::TabFoo{};
const auto bar = test::TabBar{};
auto db = MockDb{};
// Unconditionally
compare(__LINE__, custom_query(sqlpp::select(), select_flags(sqlpp::distinct), select_columns(foo.omega), from(foo),
sqlpp::unconditionally()),
compare(__LINE__,
custom_query(sqlpp::select(), select_flags(sqlpp::distinct), select_columns(foo.omega), from(foo),
sqlpp::unconditionally()),
"SELECT DISTINCT tab_foo.omega FROM tab_foo ");
// A full select statement made individual clauses
@@ -68,5 +69,16 @@ int CustomQuery(int, char* [])
custom_query(sqlpp::verbatim("PRAGMA user_version")).with_result_type_of(select(sqlpp::value(1).as(pragma))),
" PRAGMA user_version");
// An insert from select for postgresql
const auto x = 17;
compare(__LINE__,
custom_query(insert_into(foo).columns(foo.omega),
select(sqlpp::value(x).as(foo.omega))
.from(foo)
.where(not exists(select(foo.omega).from(foo).where(foo.omega == x)))),
"INSERT INTO tab_foo (omega) "
"SELECT 17 AS omega FROM tab_foo "
"WHERE (NOT EXISTS(SELECT tab_foo.omega FROM tab_foo WHERE (tab_foo.omega=17)))");
return 0;
}