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#include "pg_compat.h"
extern "C" {
#include "postgres.h"
#include "fmgr.h"
#include "utils/array.h"
#include "utils/elog.h"
#include "pgstat.h"
#include "catalog/pg_namespace_d.h"
}
#undef Max
constexpr auto PG_ERROR = ERROR;
#undef ERROR
#include "utils.h"
#include <util/system/compiler.h>
#include <yql/essentials/parser/pg_catalog/catalog.h>
#include <util/system/dynlib.h>
#define ERROR PG_ERROR
namespace NYql {
void PrepareVariadicArraySlow(FunctionCallInfoBaseData& callInfo, const NPg::TProcDesc& desc) {
const auto& elemDesc = NPg::LookupType(desc.VariadicType);
Datum varArgs[FUNC_MAX_ARGS];
bool varArgsNulls[FUNC_MAX_ARGS];
const ui32 nelems = callInfo.nargs - desc.ArgTypes.size();
Y_ENSURE(nelems >= 1);
for (ui32 i = desc.ArgTypes.size(); i < callInfo.nargs; ++i) {
varArgs[i - desc.ArgTypes.size()] = callInfo.args[i].value;
varArgsNulls[i - desc.ArgTypes.size()] = callInfo.args[i].isnull;
}
callInfo.nargs = desc.ArgTypes.size() + 1;
int dims[MAXDIM];
int lbs[MAXDIM];
dims[0] = nelems;
lbs[0] = 1;
auto array = construct_md_array(varArgs, varArgsNulls, 1, dims, lbs,
desc.VariadicType, elemDesc.TypeLen, elemDesc.PassByValue, elemDesc.TypeAlign);
auto& argDatum = callInfo.args[callInfo.nargs - 1];
argDatum.value = PointerGetDatum(array);
argDatum.isnull = false;
}
void FreeVariadicArray(FunctionCallInfoBaseData& callInfo, ui32 originalArgs) {
pfree(DatumGetPointer(callInfo.args[callInfo.nargs - 1].value));
callInfo.nargs = originalArgs;
}
static __thread ui32 PgExtIndexMax = 0;
class TExtensionsRegistry::TImpl {
public:
struct TExtension {
TExtension(const TString& name, const TString& libraryPath) {
Lib.Open(libraryPath.c_str(), RTLD_GLOBAL | RTLD_NOW);
Lib.SetUnloadable(false);
InitFunc = (TInitFunc)Lib.Sym("YqlPgThreadInit");
CleanupFunc = (TInitFunc)Lib.Sym("YqlPgThreadCleanup");
}
using TInitFunc = void(*)(void);
using TCleanupFunc = void(*)(void);
TDynamicLibrary Lib;
TInitFunc InitFunc = nullptr;
TInitFunc CleanupFunc = nullptr;
};
void InitThread() {
while (PgExtIndexMax < Extensions.size()) {
Extensions[PgExtIndexMax]->InitFunc();
++PgExtIndexMax;
}
}
void CleanupThread() {
for (ui32 i = 0; i < PgExtIndexMax; ++i) {
Extensions[i]->CleanupFunc();
}
}
void Load(ui32 extensionIndex, const TString& name, const TString& path) {
Cerr << "Loading PG extension " << name << " [" << extensionIndex << "]: " << path << "\n";
Y_ENSURE(extensionIndex == Extensions.size() + 1);
Extensions.emplace_back(std::make_unique<TExtension>(name, path));
Extensions.back()->InitFunc();
++PgExtIndexMax;
}
PGFunction GetFuncAddr(ui32 extensionIndex, const TString& funcName) {
Y_ENSURE(extensionIndex > 0 && extensionIndex <= Extensions.size());
return (PGFunction)Extensions[extensionIndex - 1]->Lib.Sym(funcName.c_str());
}
private:
TVector<std::unique_ptr<TExtension>> Extensions;
};
extern "C" ui64 TouchReadTableApi();
TExtensionsRegistry::TExtensionsRegistry()
: Impl_(std::make_unique<TImpl>())
{
Y_UNUSED(TouchReadTableApi());
}
TExtensionsRegistry& TExtensionsRegistry::Instance() {
return *Singleton<TExtensionsRegistry>();
}
void TExtensionsRegistry::InitThread() {
Impl_->InitThread();
}
void TExtensionsRegistry::CleanupThread() {
Impl_->CleanupThread();
}
void TExtensionsRegistry::Load(ui32 extensionIndex, const TString& name, const TString& path) {
Impl_->Load(extensionIndex, name, path);
}
PGFunction TExtensionsRegistry::GetFuncAddr(ui32 extensionIndex, const TString& funcName) {
return Impl_->GetFuncAddr(extensionIndex, funcName);
}
bool GetPgFuncAddr(ui32 procOid, FmgrInfo& finfo) {
Zero(finfo);
const auto& desc = NPg::LookupProc(procOid);
finfo.fn_strict = desc.IsStrict;
finfo.fn_retset = desc.ReturnSet;
finfo.fn_nargs = desc.ArgTypes.size() + (desc.VariadicArgType ? 1 : 0);
finfo.fn_mcxt = CurrentMemoryContext;
finfo.fn_oid = procOid;
finfo.fn_stats = TRACK_FUNC_ALL;
if (desc.Kind != NPg::EProcKind::Function) {
return false;
}
if (desc.ExtensionIndex == 0) {
if (desc.Lang != NPg::LangInternal) {
return false;
}
FmgrInfo tmp;
Zero(tmp);
fmgr_info(procOid, &tmp);
Y_ENSURE(tmp.fn_addr);
Y_ENSURE(finfo.fn_strict == tmp.fn_strict);
Y_ENSURE(finfo.fn_retset == tmp.fn_retset);
Y_ENSURE(finfo.fn_nargs == tmp.fn_nargs);
finfo.fn_addr = tmp.fn_addr;
return true;
}
const auto& extension = NPg::LookupExtension(desc.ExtensionIndex);
if (extension.TypesOnly) {
return false;
}
if (desc.Lang != NPg::LangC) {
return false;
}
finfo.fn_addr = TExtensionsRegistry::Instance().GetFuncAddr(desc.ExtensionIndex, desc.Src);
return true;
}
extern "C" Oid get_extension_oid(const char *extname, bool missing_ok)
{
Oid result = InvalidOid;
try {
result = NPg::LookupExtensionByName(extname);
} catch (const yexception&) {
}
if (!OidIsValid(result) && !missing_ok)
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("extension \"%s\" does not exist",
extname)));
return result;
}
extern "C" char *get_extension_name(Oid ext_oid) {
try {
return pstrdup(NPg::LookupExtension(ext_oid).Name.c_str());
} catch (const yexception&) {
return nullptr;
}
}
extern "C" Oid get_extension_schema(Oid) {
return PG_CATALOG_NAMESPACE;
}
}
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