mirror of
https://github.com/hanzo-ds/cpp.git
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zeekay
286f257aae
Pure rename applied on top of upstream tag v2.6.2 (8d2415d6), not HEAD.
The fork was cut at 737145d = v2.6.2-57, which still declared version 2.6.2
in version.h; renaming there would have shipped 57 unreleased commits wearing
a 2.6.2 label. Reset to the tag first so this commit changes names only.
clickhouse/ -> datastore/ (public include root)
namespace clickhouse -> namespace datastore
CLICKHOUSE_CPP_VERSION -> DATASTORE_CPP_VERSION
clickhouse-cpp-lib/-ut -> datastore-cpp-lib/-ut (CMake, Bazel)
CH_MAP_BOOL_TO_UINT8 -> DS_MAP_BOOL_TO_UINT8
CLICKHOUSE_* -> DATASTORE_* (test env vars)
doc links -> docs.hanzo.ai/datastore
This client speaks the NATIVE binary protocol only - there is no HTTP path
and no X-ClickHouse-* header anywhere in it, so the header rename that the
HTTP clients required does not apply and nothing here was broken.
The one string that reaches the wire is CLIENT_NAME, sent by both SendHello
and SendQuery's ClientInfo from a single macro, and it lands in
system.query_log.client_name. Both sites still read the one macro, so they
stay consistent and the server's Hello/Query consistency check is satisfied.
Old rows keep the old name; that is a reporting discontinuity, not a
migration, since nothing keys on it.
CI is repointed at our own server: ghcr.io/hanzoai/datastore:26.2.3.2, the
image production runs. Its entrypoint honours DATASTORE_SKIP_USER_SETUP, not
the CLICKHOUSE_ spelling the compose file used, and its config lives in
/etc/hanzo-datastore-server. ci/docker-compose/config.xml is now layered in
as a config.d drop-in so the image keeps its own white-labelling. That file
and users.xml deliberately keep a <clickhouse> root: it must match the roots
of the drop-ins the image ships, and a mismatch fails silently - the server
logs "Merging bypassed" and starts with every drop-in discarded.
The remote-TLS suites used to default to the third-party host
play.clickhouse.com. They now read DATASTORE_SECURE*_HOST and skip when it is
unset rather than point at a host we do not run.
Dropped as upstream infrastructure with no meaning here: AI_POLICY.md
(upstream's policy about their codebase), .travis.yml (dead CI referencing a
third-party apt repo), cross-repo-bug-relay.yml (relays our issues into an
upstream triage repo). LICENSE keeps its copyright notice, as Apache-2.0
requires.
Verified: cmake configure + 115-target build clean; the full suite is green
against ghcr.io/hanzoai/datastore:26.2.3.2 (894 passed, 0 failed); the
pristine v2.6.2 build run against that same server passes the identical set,
and both logged the same 3914 queries under their respective client names.
91 lines
2.8 KiB
C++
91 lines
2.8 KiB
C++
#pragma once
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#include "../types/types.h"
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#include "../exceptions.h"
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#include <string_view>
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#include <stdexcept>
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#include <type_traits>
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namespace datastore {
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/** ItemView is a view on a data stored in Column, safe-ish interface for reading values from Column.
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*
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* Data is not owned (hence the name View) and will be invalidated on column update, load
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* or destruction (basically on calling any non-const method of Column).
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* `type` reflects what is stored in `data` and can be almost any value-type
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* (except Nullable, Array, Tuple, LowCardinality).
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*
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*/
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struct ItemView {
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using DataType = std::string_view;
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const Type::Code type;
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const DataType data;
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private:
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template <typename T>
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inline auto ConvertToStorageValue(const T& t) {
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if constexpr (std::is_same_v<std::string_view, T> || std::is_same_v<std::string, T>) {
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return std::string_view{t};
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} else if constexpr (std::is_fundamental_v<T>
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|| std::is_same_v<Int128, std::decay_t<T>>
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|| std::is_same_v<UInt128, std::decay_t<T>>) {
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return std::string_view{reinterpret_cast<const char*>(&t), sizeof(T)};
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} else {
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static_assert(!std::is_same_v<T, T>, "Unknown type, which can't be stored in ItemView");
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return;
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}
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}
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public:
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ItemView(Type::Code type, DataType data)
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: type(type),
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data(data)
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{
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ValidateData(type, data);
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}
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ItemView(Type::Code type, ItemView other)
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: type(type),
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data(other.data)
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{
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ValidateData(type, data);
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}
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explicit ItemView()
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: ItemView(Type::Void, std::string_view{})
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{}
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template <typename T>
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explicit ItemView(Type::Code type, const T & value)
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: ItemView(type, ConvertToStorageValue(value))
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{}
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template <typename T>
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auto get() const {
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using ValueType = std::remove_cv_t<std::decay_t<T>>;
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if constexpr (std::is_same_v<std::string_view, ValueType> || std::is_same_v<std::string, ValueType>) {
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return data;
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} else if constexpr (std::is_fundamental_v<ValueType>
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|| std::is_same_v<Int128, ValueType>
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|| std::is_same_v<UInt128, ValueType>) {
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if (sizeof(ValueType) == data.size()) {
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return *reinterpret_cast<const T*>(data.data());
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} else {
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throw AssertionError("Incompatitable value type and size. Requested size: "
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+ std::to_string(sizeof(ValueType)) + " stored size: " + std::to_string(data.size()));
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}
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}
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}
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inline std::string_view AsBinaryData() const {
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return data;
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}
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// Validate that value matches type, will throw an exception if validation fails.
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static void ValidateData(Type::Code type, DataType data);
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};
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}
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