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#include <memory>
#include <Interpreters/evaluateConstantExpression.h>
#include <Parsers/ASTFunction.h>
#include <Parsers/ASTSelectQuery.h>
#include <Parsers/IAST_fwd.h>
#include <Processors/Formats/IOutputFormat.h>
#include <QueryPipeline/Pipe.h>
#include <Storages/IStorage.h>
#include <Storages/MeiliSearch/MeiliSearchConnection.h>
#include <Storages/MeiliSearch/SinkMeiliSearch.h>
#include <Storages/MeiliSearch/SourceMeiliSearch.h>
#include <Storages/MeiliSearch/StorageMeiliSearch.h>
#include <Storages/SelectQueryInfo.h>
#include <Storages/StorageFactory.h>
#include <Storages/StorageInMemoryMetadata.h>
#include <Storages/checkAndGetLiteralArgument.h>
#include <Storages/NamedCollectionsHelpers.h>
#include <Common/logger_useful.h>
#include <Common/parseAddress.h>
#include <Common/NamedCollections/NamedCollections.h>
#include <Storages/MeiliSearch/MeiliSearchColumnDescriptionFetcher.h>
namespace DB
{
namespace ErrorCodes
{
extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
extern const int BAD_QUERY_PARAMETER;
extern const int BAD_ARGUMENTS;
}
StorageMeiliSearch::StorageMeiliSearch(
const StorageID & table_id,
const MeiliSearchConfiguration & config_,
const ColumnsDescription & columns_,
const ConstraintsDescription & constraints_,
const String & comment)
: IStorage(table_id), config{config_}, log(&Poco::Logger::get("StorageMeiliSearch (" + table_id.table_name + ")"))
{
StorageInMemoryMetadata storage_metadata;
if (columns_.empty())
{
auto columns = getTableStructureFromData(config);
storage_metadata.setColumns(columns);
}
else
storage_metadata.setColumns(columns_);
storage_metadata.setConstraints(constraints_);
storage_metadata.setComment(comment);
setInMemoryMetadata(storage_metadata);
}
ColumnsDescription StorageMeiliSearch::getTableStructureFromData(const MeiliSearchConfiguration & config_)
{
MeiliSearchColumnDescriptionFetcher fetcher(config_);
fetcher.addParam(doubleQuoteString("limit"), "1");
return fetcher.fetchColumnsDescription();
}
String convertASTtoStr(ASTPtr ptr)
{
WriteBufferFromOwnString out;
IAST::FormatSettings settings(
out, /*one_line*/ true, /*hilite*/ false,
/*always_quote_identifiers*/ IdentifierQuotingStyle::BackticksMySQL != IdentifierQuotingStyle::None,
/*identifier_quoting_style*/ IdentifierQuotingStyle::BackticksMySQL);
ptr->format(settings);
return out.str();
}
ASTPtr getFunctionParams(ASTPtr node, const String & name)
{
if (!node)
return nullptr;
const auto * ptr = node->as<ASTFunction>();
if (ptr && ptr->name == name)
{
if (node->children.size() == 1)
return node->children[0];
else
return nullptr;
}
for (const auto & next : node->children)
{
auto res = getFunctionParams(next, name);
if (res != nullptr)
return res;
}
return nullptr;
}
Pipe StorageMeiliSearch::read(
const Names & column_names,
const StorageSnapshotPtr & storage_snapshot,
SelectQueryInfo & query_info,
ContextPtr /*context*/,
QueryProcessingStage::Enum /*processed_stage*/,
size_t max_block_size,
size_t /*num_streams*/)
{
storage_snapshot->check(column_names);
ASTPtr original_where = query_info.query->clone()->as<ASTSelectQuery &>().where();
ASTPtr query_params = getFunctionParams(original_where, "meiliMatch");
MeiliSearchSource::QueryRoute route = MeiliSearchSource::QueryRoute::documents;
std::unordered_map<String, String> kv_pairs_params;
if (query_params)
{
route = MeiliSearchSource::QueryRoute::search;
LOG_TRACE(log, "Query params: {}", convertASTtoStr(query_params));
for (const auto & el : query_params->children)
{
auto str = el->getColumnName();
auto it = std::find(str.begin(), str.end(), '=');
if (it == str.end())
throw Exception(ErrorCodes::BAD_QUERY_PARAMETER, "meiliMatch function must have parameters of the form \'key=value\'");
String key(str.begin() + 1, it);
String value(it + 1, str.end() - 1);
kv_pairs_params[key] = value;
}
}
else
{
LOG_TRACE(log, "Query params: none");
}
for (const auto & el : kv_pairs_params)
LOG_TRACE(log, "Parsed parameter: key = {}, value = {}", el.first, el.second);
auto sample_block = storage_snapshot->getSampleBlockForColumns(column_names);
return Pipe(std::make_shared<MeiliSearchSource>(config, sample_block, max_block_size, route, kv_pairs_params));
}
SinkToStoragePtr StorageMeiliSearch::write(const ASTPtr & /*query*/, const StorageMetadataPtr & metadata_snapshot, ContextPtr local_context, bool /*async_insert*/)
{
LOG_TRACE(log, "Trying update index: {}", config.index);
return std::make_shared<SinkMeiliSearch>(config, metadata_snapshot->getSampleBlock(), local_context);
}
MeiliSearchConfiguration StorageMeiliSearch::getConfiguration(ASTs engine_args, ContextPtr context)
{
if (auto named_collection = tryGetNamedCollectionWithOverrides(engine_args, context))
{
validateNamedCollection(*named_collection, {"url", "index"}, {"key"});
String url = named_collection->get<String>("url");
String index = named_collection->get<String>("index");
String key = named_collection->getOrDefault<String>("key", "");
if (url.empty() || index.empty())
{
throw Exception(ErrorCodes::BAD_ARGUMENTS,
"Storage MeiliSearch requires 3 parameters: MeiliSearch('url', 'index', 'key'= \"\")");
}
return MeiliSearchConfiguration(url, index, key);
}
else
{
if (engine_args.size() < 2 || 3 < engine_args.size())
{
throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH,
"Storage MeiliSearch requires 3 parameters: MeiliSearch('url', 'index', 'key'= \"\")");
}
for (auto & engine_arg : engine_args)
engine_arg = evaluateConstantExpressionOrIdentifierAsLiteral(engine_arg, context);
String url = checkAndGetLiteralArgument<String>(engine_args[0], "url");
String index = checkAndGetLiteralArgument<String>(engine_args[1], "index");
String key;
if (engine_args.size() == 3)
key = checkAndGetLiteralArgument<String>(engine_args[2], "key");
return MeiliSearchConfiguration(url, index, key);
}
}
void registerStorageMeiliSearch(StorageFactory & factory)
{
factory.registerStorage(
"MeiliSearch",
[](const StorageFactory::Arguments & args)
{
auto config = StorageMeiliSearch::getConfiguration(args.engine_args, args.getLocalContext());
return std::make_shared<StorageMeiliSearch>(args.table_id, config, args.columns, args.constraints, args.comment);
},
{
.supports_schema_inference = true,
.source_access_type = AccessType::MEILISEARCH,
});
}
}
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