Basic support for update in Crud implementation, error reporting and transfering data to modified set is still missing.

pglablib/PgCatalogTypes.h

@@ -3,8 +3,11 @@
 
 #include <libpq-fe.h>
 #include <vector>
+#include <boost/container/small_vector.hpp>
 
 using AttNumVec	= std::vector<int16_t>;
+template<int size>
+using SmallAttNumVec = boost::container::small_vector<int16_t, size>;
 using OidVec = std::vector<Oid>;
 
 #endif // PGCATALOGTYPES_H

pglablib/PgConstraint.h

@@ -65,8 +65,8 @@ public:
 	bool islocal;
 	int32_t inhcount;
 	bool noinherit;
-	AttNumVec key; // list of constraint columns attnum
-	AttNumVec fkey; // fkey list of referenced columns
+	SmallAttNumVec<5> key; // list of constraint columns attnum
+	SmallAttNumVec<5> fkey; // fkey list of referenced columns
 	OidVec pfeqop;
 	OidVec ppeqop;
 	OidVec ffeqop;

pglablib/QueryGenerator.cpp

@@ -0,0 +1,22 @@
+#include "QueryGenerator.h"
+#include "PgDatabaseCatalog.h"
+#include "PgClass.h"
+#include "PgNamespace.h"
+#include "PgNamespaceContainer.h"
+
+using namespace Querygen;
+
+QueryGeneratorFactory::QueryGeneratorFactory(std::shared_ptr<PgDatabaseCatalog> catalog)
+	: m_catalog(catalog)
+{}
+
+UpdatePtr QueryGeneratorFactory::update(QString ns, QString table_name, QString alias)
+{
+	return std::make_shared<Update>(ns, table_name, alias);
+}
+
+UpdatePtr QueryGeneratorFactory::update(const PgClass &table_class, QString alias)
+{
+	//QString nsname = m_catalog->namespaces()->getByKey(table_class.relnamespace_name)
+	return  update(table_class.relnamespace_name, table_class.name, alias);
+}

pglablib/QueryGenerator.h

@@ -0,0 +1,60 @@
+#ifndef QUERYGENERATOR_H
+#define QUERYGENERATOR_H
+
+#include <QString>
+#include <memory>
+
+class PgDatabaseCatalog;
+class PgClass;
+
+namespace Querygen {
+
+
+class QueryGeneratorFactory;
+using QueryGeneratorFactoryPtr = std::shared_ptr<QueryGeneratorFactory>;
+
+class Update;
+using UpdatePtr = std::shared_ptr<Update>;
+
+class ColumnRef;
+using ColumnRefPtr = std::shared_ptr<ColumnRef>;
+
+class FQTableName {
+public:
+	QString nsName;
+	QString tableName;
+};
+
+
+class ColumnRef {
+public:
+	virtual QString getFCQS() const = 0;
+};
+
+ class Update {
+public:
+	Update(QString ns, QString tbl, QString alias)
+		: table{ns, tbl}
+	{}
+
+private:
+	FQTableName table;
+	QString tableAlias;
+};
+
+using UpdatePtr = std::shared_ptr<Update>;
+
+
+class QueryGeneratorFactory {
+public:
+	QueryGeneratorFactory(std::shared_ptr<PgDatabaseCatalog> catalog);
+
+	UpdatePtr update(QString ns, QString table_name, QString alias = QString());
+	UpdatePtr update(const PgClass &table_class, QString alias = QString());
+private:
+	std::shared_ptr<PgDatabaseCatalog> m_catalog;
+};
+
+} // end namespace Querygen
+
+#endif // QUERYGENERATOR_H

pglablib/SqlFormattingUtils.cpp

@@ -94,7 +94,7 @@ private:
 	QString m_str;
 };
 
-QString getColumnNameList(const PgDatabaseCatalog &catalog, Oid relid, const AttNumVec &attnums)
+QString getColumnNameList(const PgDatabaseCatalog &catalog, Oid relid, const SmallAttNumVec<5> &attnums)
 {
 	IdentListString result;
 

pglablib/SqlFormattingUtils.h

@@ -8,6 +8,7 @@ class PgConstraint;
 class PgDatabaseCatalog;
 
 bool identNeedsQuotes(QString ident);
+QString quoteIdent(QString ident);
 
 QString genFQTableName(const PgDatabaseCatalog &catalog, const PgClass &cls);
 QString getDropConstraintDefinition(const PgDatabaseCatalog &catalog, const PgConstraint &constraint);

pglablib/pglablib.pro

@@ -51,7 +51,8 @@ SOURCES += \
     ParamListModel.cpp \
     util.cpp \
     SqlFormattingUtils.cpp \
-    PgKeywordList.cpp
+    PgKeywordList.cpp \
+    QueryGenerator.cpp
 
 HEADERS += \
         Pglablib.h \
@@ -80,7 +81,8 @@ HEADERS += \
     util.h \ 
     SqlFormattingUtils.h \
     PgCatalogTypes.h \
-    PgKeywordList.h
+    PgKeywordList.h \
+    QueryGenerator.h
 
 unix {
     target.path = /usr/lib

pglablib/util.cpp

@@ -62,9 +62,9 @@ void exportTable(const QTableView *view, QTextStream &out)
 		csv.setSeperator('\t');
 		csv.setQuote('"');
 
-		const int cols = model->columnCount();
-		const int rows = model->rowCount();
-		for (int row = 0; row < rows; ++row) {
+		auto cols = model->columnCount();
+		auto rows = model->rowCount();
+		for (auto row = 0; row < rows; ++row) {
 			for (int col = 0; col < cols; ++col) {
 				auto idx = model->index(row, col);
 				auto display_text = idx.data(Qt::DisplayRole).toString();