Reorganize files in pglablib

The enitities and containers of the catalog now go into catalog subfolder
Models go into model

pglablib/catalog/PgIndexContainer.cpp

@@ -0,0 +1,53 @@
+#include "PgIndexContainer.h"
+#include "PgClassContainer.h"
+#include "PgDatabaseCatalog.h"
+#include "Pgsql_Col.h"
+#include <iterator>
+
+std::string PgIndexContainer::getLoadQuery() const
+{
+	std::string q =  R"__(
+SELECT indexrelid, indrelid, indnatts, indisunique, indisprimary,
+	indisexclusion, indimmediate, indisclustered, indisvalid,
+	indcheckxmin, indisready, indislive, indkey,
+	indcollation, indclass, indoption, indexprs, indpred,
+	pg_get_indexdef(indexrelid))__";
+
+	if (minimumVersion(90400))
+		q += ", indisreplident ";
+	q += "\nFROM pg_index";
+	return q;
+}
+
+PgIndex PgIndexContainer::loadElem(const Pgsql::Row &row)
+{
+	Pgsql::Col col(row);
+	Oid indexrelid = col.nextValue();
+	auto&& cls = m_catalog.classes()->getByKey(indexrelid);
+	auto&& name = cls->objectName();
+	auto&& nsoid = cls->nsOid();
+
+	PgIndex v(m_catalog, indexrelid, name, nsoid);
+	col >> v.relid >> v.natts >> v.isunique
+		>> v.isprimary >> v.isexclusion >> v.immediate >> v.isclustered
+		>> v.isvalid >> v.checkxmin >> v.isready >> v.islive;
+	col.getAsVector<int16_t>(std::back_inserter(v.key));
+	col.getAsVector<Oid>(std::back_inserter(v.collation));
+	col.getAsVector<Oid>(std::back_inserter(v.indclass));
+	col.getAsVector<int16_t>(std::back_inserter(v.option));
+	col >> v.exprs >> v.pred >> v.definition;
+	if (minimumVersion(90400))
+		col >> v.isreplident;
+
+	return v;
+}
+
+std::vector<PgIndex> PgIndexContainer::getIndexesForTable(Oid table_oid) const
+{
+	std::vector<PgIndex> result;
+	for (const auto &e : m_container)
+		if (e.relid == table_oid)
+			result.push_back(e);
+
+	return result;
+}