the begginning

utils/funcexp/func_char_length.cpp

@@ -0,0 +1,116 @@
+/* Copyright (C) 2014 InfiniDB, Inc.
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License
+   as published by the Free Software Foundation; version 2 of
+   the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA. */
+
+/****************************************************************************
+* $Id: func_char_length.cpp 3923 2013-06-19 21:43:06Z bwilkinson $
+*
+*
+****************************************************************************/
+
+#include <cstdlib>
+#include <string>
+#include <sstream>
+using namespace std;
+
+#include "functor_int.h"
+#include "functioncolumn.h"
+#include "rowgroup.h"
+#include "calpontsystemcatalog.h"
+#include "utils_utf8.h"
+using namespace execplan;
+
+#include "dataconvert.h"
+
+#include "errorcodes.h"
+#include "idberrorinfo.h"
+#include "errorids.h"
+using namespace logging;
+
+namespace funcexp
+{
+
+CalpontSystemCatalog::ColType Func_char_length::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
+{
+	return resultType;
+}
+
+int64_t Func_char_length::getIntVal(rowgroup::Row& row,
+						FunctionParm& parm,
+						bool& isNull,
+						CalpontSystemCatalog::ColType& op_ct)
+{
+	CalpontSystemCatalog::ColDataType type = parm[0]->data()->resultType().colDataType;
+
+	switch (type)
+	{
+		case execplan::CalpontSystemCatalog::BIGINT:
+		case execplan::CalpontSystemCatalog::INT:
+		case execplan::CalpontSystemCatalog::MEDINT:
+		case execplan::CalpontSystemCatalog::TINYINT:
+		case execplan::CalpontSystemCatalog::SMALLINT:
+        case execplan::CalpontSystemCatalog::UBIGINT:
+        case execplan::CalpontSystemCatalog::UINT:
+        case execplan::CalpontSystemCatalog::UMEDINT:
+        case execplan::CalpontSystemCatalog::UTINYINT:
+        case execplan::CalpontSystemCatalog::USMALLINT:
+		case execplan::CalpontSystemCatalog::DOUBLE:
+        case execplan::CalpontSystemCatalog::UDOUBLE:
+		case execplan::CalpontSystemCatalog::FLOAT:
+        case execplan::CalpontSystemCatalog::UFLOAT:
+		case execplan::CalpontSystemCatalog::VARCHAR: // including CHAR
+		case execplan::CalpontSystemCatalog::CHAR:
+		case execplan::CalpontSystemCatalog::DECIMAL:
+        case execplan::CalpontSystemCatalog::UDECIMAL:
+		{
+			const string& tstr = parm[0]->data()->getStrVal(row, isNull);
+			if (isNull)
+				return 0;
+
+			size_t strwclen = utf8::idb_mbstowcs(0, tstr.c_str(), 0) + 1;
+			wchar_t* wcbuf = (wchar_t*)alloca(strwclen * sizeof(wchar_t));
+			strwclen = utf8::idb_mbstowcs(wcbuf, tstr.c_str(), strwclen);
+
+			return (int64_t)strwclen;
+		}
+
+		case execplan::CalpontSystemCatalog::DATE:
+		{
+			string date = dataconvert::DataConvert::dateToString(parm[0]->data()->getDateIntVal(row, isNull));
+			return (int64_t)date.size();
+		}	
+
+		case execplan::CalpontSystemCatalog::DATETIME:
+		{
+			string date = dataconvert::DataConvert::datetimeToString(parm[0]->data()->getDatetimeIntVal(row, isNull));
+			//adjust for microseconds not counted
+			return (int64_t)date.size() - 7;
+		}
+
+		default:
+		{
+			std::ostringstream oss;
+			oss << "char_length: datatype of " << execplan::colDataTypeToString(type);
+			throw logging::IDBExcept(oss.str(), ERR_DATATYPE_NOT_SUPPORT);
+		}
+	}
+
+	return 0;
+}
+
+
+} // namespace funcexp
+// vim:ts=4 sw=4: