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#include "global.h"
#include "column.h"
#include "function.h"
#include "named_node.h"
#include "parse_tree.h"
#include "use.h"
#include <yql/essentials/sql/v1/complete/antlr4/pipeline.h>
#include <yql/essentials/sql/v1/complete/syntax/ansi.h>
#include <library/cpp/iterator/functools.h>
#include <util/string/join.h>
namespace NSQLComplete {
bool operator<(const TColumnId& lhs, const TColumnId& rhs) {
return std::tie(lhs.TableAlias, lhs.Name) < std::tie(rhs.TableAlias, rhs.Name);
}
TColumnContext TColumnContext::ExtractAliased(TMaybe<TStringBuf> alias) {
if (alias.Empty()) {
return *this;
}
auto aliasedTables = std::ranges::partition(Tables, [&](const auto& table) {
return table.Alias != alias;
});
auto aliasedColumns = std::ranges::partition(Columns, [&](const auto& column) {
return column.TableAlias != alias;
});
TVector<TAliased<TTableId>> tables(aliasedTables.begin(), aliasedTables.end());
TVector<TColumnId> columns(aliasedColumns.begin(), aliasedColumns.end());
Tables.erase(aliasedTables.begin(), aliasedTables.end());
Columns.erase(aliasedColumns.begin(), aliasedColumns.end());
return {
.Tables = std::move(tables),
.Columns = std::move(columns),
};
}
bool TColumnContext::IsAsterisk() const {
return Columns.size() == 1 &&
Columns[0].TableAlias.empty() &&
Columns[0].Name == "*";
}
TColumnContext TColumnContext::Renamed(TStringBuf alias) && {
for (TAliased<TTableId>& table : Tables) {
table.Alias = alias;
}
for (TColumnId& column : Columns) {
column.TableAlias = alias;
}
return *this;
}
TColumnContext operator|(TColumnContext lhs, TColumnContext rhs) {
lhs.Tables.reserve(lhs.Tables.size() + rhs.Tables.size());
lhs.Columns.reserve(lhs.Columns.size() + rhs.Columns.size());
std::move(rhs.Tables.begin(), rhs.Tables.end(), std::back_inserter(lhs.Tables));
std::move(rhs.Columns.begin(), rhs.Columns.end(), std::back_inserter(lhs.Columns));
SortUnique(lhs.Tables);
SortUnique(lhs.Columns);
return lhs;
}
TColumnContext TColumnContext::Asterisk() {
return {.Columns = {{.Name = "*"}}};
}
class TErrorStrategy: public antlr4::DefaultErrorStrategy {
public:
antlr4::Token* singleTokenDeletion(antlr4::Parser* /* recognizer */) override {
return nullptr;
}
};
template <bool IsAnsiLexer>
class TSpecializedGlobalAnalysis: public IGlobalAnalysis {
public:
using TDefaultYQLGrammar = TAntlrGrammar<
NALADefaultAntlr4::SQLv1Antlr4Lexer,
NALADefaultAntlr4::SQLv1Antlr4Parser>;
using TAnsiYQLGrammar = TAntlrGrammar<
NALAAnsiAntlr4::SQLv1Antlr4Lexer,
NALAAnsiAntlr4::SQLv1Antlr4Parser>;
using G = std::conditional_t<
IsAnsiLexer,
TAnsiYQLGrammar,
TDefaultYQLGrammar>;
TSpecializedGlobalAnalysis()
: Chars_()
, Lexer_(&Chars_)
, Tokens_(&Lexer_)
, Parser_(&Tokens_)
{
Lexer_.removeErrorListeners();
Parser_.removeErrorListeners();
Parser_.setErrorHandler(std::make_shared<TErrorStrategy>());
}
TGlobalContext Analyze(TCompletionInput input, TEnvironment env) override {
TString recovered;
if (IsRecoverable(input)) {
recovered = TString(input.Text);
// - "_" is to parse `SELECT x._ FROM table`
// instead of `SELECT x.FROM table`
recovered.insert(input.CursorPosition, "_");
input.Text = recovered;
}
SQLv1::Sql_queryContext* sqlQuery = Parse(input.Text);
Y_ENSURE(sqlQuery);
TGlobalContext ctx;
// TODO(YQL-19747): Add ~ParseContext(Tokens, ParseTree, CursorPosition)
ctx.Use = FindUseStatement(sqlQuery, &Tokens_, input.CursorPosition, env);
ctx.Names = CollectNamedNodes(sqlQuery, &Tokens_, input.CursorPosition);
ctx.EnclosingFunction = EnclosingFunction(sqlQuery, &Tokens_, input.CursorPosition);
ctx.Column = InferColumnContext(sqlQuery, &Tokens_, input.CursorPosition);
if (ctx.Use && ctx.Column) {
EnrichTableClusters(*ctx.Column, *ctx.Use);
}
return ctx;
}
private:
bool IsRecoverable(TCompletionInput input) const {
static const TStringBuf prev = " ";
static const TStringBuf next = " .(";
TStringBuf s = input.Text;
size_t i = input.CursorPosition;
return (i < s.size() && prev.Contains(s[i]) || i == s.size()) &&
(i > 0 /* */ && next.Contains(s[i - 1]));
}
SQLv1::Sql_queryContext* Parse(TStringBuf input) {
Chars_.load(input.Data(), input.Size(), /* lenient = */ false);
Lexer_.reset();
Tokens_.setTokenSource(&Lexer_);
Parser_.reset();
return Parser_.sql_query();
}
void EnrichTableClusters(TColumnContext& column, const TUseContext& use) {
for (auto& table : column.Tables) {
if (table.Cluster.empty()) {
table.Cluster = use.Cluster;
}
}
}
void DebugPrint(TStringBuf query, antlr4::ParserRuleContext* ctx) {
Cerr << "= = = = = = " << Endl;
Cerr << query << Endl;
Cerr << ctx->toStringTree(&Parser_, true) << Endl;
}
antlr4::ANTLRInputStream Chars_;
G::TLexer Lexer_;
antlr4::CommonTokenStream Tokens_;
TDefaultYQLGrammar::TParser Parser_;
};
class TGlobalAnalysis: public IGlobalAnalysis {
public:
TGlobalContext Analyze(TCompletionInput input, TEnvironment env) override {
const bool isAnsiLexer = IsAnsiQuery(TString(input.Text));
return GetSpecialized(isAnsiLexer).Analyze(std::move(input), std::move(env));
}
private:
IGlobalAnalysis& GetSpecialized(bool isAnsiLexer) {
if (isAnsiLexer) {
return AnsiAnalysis_;
}
return DefaultAnalysis_;
}
TSpecializedGlobalAnalysis</* IsAnsiLexer = */ false> DefaultAnalysis_;
TSpecializedGlobalAnalysis</* IsAnsiLexer = */ true> AnsiAnalysis_;
};
IGlobalAnalysis::TPtr MakeGlobalAnalysis() {
return MakeHolder<TGlobalAnalysis>();
}
} // namespace NSQLComplete
template <>
void Out<NSQLComplete::TAliased<NSQLComplete::TTableId>>(IOutputStream& out, const NSQLComplete::TAliased<NSQLComplete::TTableId>& value) {
Out<NSQLComplete::TTableId>(out, value);
out << " AS " << value.Alias;
}
template <>
void Out<NSQLComplete::TColumnId>(IOutputStream& out, const NSQLComplete::TColumnId& value) {
out << value.TableAlias << "." << value.Name;
}
template <>
void Out<NSQLComplete::TColumnContext>(IOutputStream& out, const NSQLComplete::TColumnContext& value) {
out << "TColumnContext { ";
out << "Tables: " << JoinSeq(", ", value.Tables);
out << ", Columns: " << JoinSeq(", ", value.Columns);
out << " }";
}
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