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#include <TableFunctions/TableFunctionSQLite.h>
#if USE_SQLITE
#include <Common/Exception.h>
#include <Common/quoteString.h>
#error #include <Databases/SQLite/SQLiteUtils.h>
#include "registerTableFunctions.h"
#include <Interpreters/evaluateConstantExpression.h>
#include <Parsers/ASTFunction.h>
#include <TableFunctions/ITableFunction.h>
#include <TableFunctions/TableFunctionFactory.h>
#include <Storages/checkAndGetLiteralArgument.h>
namespace DB
{
namespace ErrorCodes
{
extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
extern const int BAD_ARGUMENTS;
}
StoragePtr TableFunctionSQLite::executeImpl(const ASTPtr & /*ast_function*/,
ContextPtr context, const String & table_name, ColumnsDescription cached_columns, bool /*is_insert_query*/) const
{
auto storage = std::make_shared<StorageSQLite>(StorageID(getDatabaseName(), table_name),
sqlite_db,
database_path,
remote_table_name,
cached_columns, ConstraintsDescription{}, context);
storage->startup();
return storage;
}
ColumnsDescription TableFunctionSQLite::getActualTableStructure(ContextPtr /* context */, bool /*is_insert_query*/) const
{
return StorageSQLite::getTableStructureFromData(sqlite_db, remote_table_name);
}
void TableFunctionSQLite::parseArguments(const ASTPtr & ast_function, ContextPtr context)
{
const auto & func_args = ast_function->as<ASTFunction &>();
if (!func_args.arguments)
throw Exception(ErrorCodes::BAD_ARGUMENTS, "Table function 'sqlite' must have arguments.");
ASTs & args = func_args.arguments->children;
if (args.size() != 2)
throw Exception(ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH, "SQLite database requires 2 arguments: database path, table name");
for (auto & arg : args)
arg = evaluateConstantExpressionOrIdentifierAsLiteral(arg, context);
database_path = checkAndGetLiteralArgument<String>(args[0], "database_path");
remote_table_name = checkAndGetLiteralArgument<String>(args[1], "table_name");
sqlite_db = openSQLiteDB(database_path, context);
}
void registerTableFunctionSQLite(TableFunctionFactory & factory)
{
factory.registerFunction<TableFunctionSQLite>();
}
}
#endif
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