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Use templates to make writing data to PostgreSQL more generic

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This way we don't need to hardwire any types.

Also adds some docs and tests.
This commit is contained in:
Jochen Topf
2022-03-07 14:58:27 +01:00
parent ce062967c9
commit 47fc05e286
3 changed files with 155 additions and 34 deletions
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70
tests/test-pgsql.cpp
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@ -40,3 +40,73 @@ TEST_CASE("PostGIS version")
auto const postgis_version = get_postgis_version(conn);
REQUIRE(postgis_version.major >= 2);
}
TEST_CASE("query with SELECT should work")
{
auto conn = db.db().connect();
auto const result = conn.query(PGRES_TUPLES_OK, "SELECT 42");
REQUIRE(result.status() == PGRES_TUPLES_OK);
REQUIRE(result.num_fields() == 1);
REQUIRE(result.num_tuples() == 1);
REQUIRE(result.get_value_as_string(0, 0) == "42");
}
TEST_CASE("query with invalid SQL should fail")
{
auto conn = db.db().connect();
REQUIRE_THROWS(conn.query(PGRES_TUPLES_OK, "NOT-VALID-SQL"));
}
TEST_CASE("exec with invalid SQL should fail")
{
auto conn = db.db().connect();
REQUIRE_THROWS(conn.exec("XYZ"));
}
TEST_CASE("exec_prepared without parameters should work")
{
auto conn = db.db().connect();
conn.exec("PREPARE test AS SELECT 42");
auto const result = conn.exec_prepared("test");
REQUIRE(result.status() == PGRES_TUPLES_OK);
REQUIRE(result.num_fields() == 1);
REQUIRE(result.num_tuples() == 1);
REQUIRE(result.get_value_as_string(0, 0) == "42");
}
TEST_CASE("exec_prepared with single string parameters should work")
{
auto conn = db.db().connect();
conn.exec("PREPARE test(int) AS SELECT $1");
auto const result = conn.exec_prepared("test", "17");
REQUIRE(result.status() == PGRES_TUPLES_OK);
REQUIRE(result.num_fields() == 1);
REQUIRE(result.num_tuples() == 1);
REQUIRE(result.get_value_as_string(0, 0) == "17");
}
TEST_CASE("exec_prepared with string parameters should work")
{
auto conn = db.db().connect();
conn.exec("PREPARE test(int, int, int) AS SELECT $1 + $2 + $3");
auto const result = conn.exec_prepared("test", "1", "2", std::string{"3"});
REQUIRE(result.status() == PGRES_TUPLES_OK);
REQUIRE(result.num_fields() == 1);
REQUIRE(result.num_tuples() == 1);
REQUIRE(result.get_value_as_string(0, 0) == "6");
}
TEST_CASE("exec_prepared with non-string parameters should work")
{
auto conn = db.db().connect();
conn.exec("PREPARE test(int, int, int) AS SELECT $1 + $2 + $3");
auto const result = conn.exec_prepared("test", 1, 2.0, 3ULL);
REQUIRE(result.status() == PGRES_TUPLES_OK);
REQUIRE(result.num_fields() == 1);
REQUIRE(result.num_tuples() == 1);
REQUIRE(result.get_value_as_string(0, 0) == "6");
}