added column_expression and table_column_expression

source/orm/query/column_expression.cpp

@@ -0,0 +1,49 @@
+#include "matador/query/column_expression.hpp"
+
+namespace matador::query {
+binary_column_expression::binary_column_expression(column_expression_ptr left_column, binary_expression_operator operand, column_expression_ptr right_column)
+: left_column_(std::move(left_column))
+, operand_(operand)
+, right_column_(std::move(right_column)) {
+}
+
+void binary_column_expression::accept(expression_visitor &visitor) const {
+  visitor.visit(*this);
+}
+
+table_column_expression::table_column_expression(table_column col)
+: column_(std::move(col)){
+}
+
+void table_column_expression::accept(expression_visitor &visitor) const {
+  visitor.visit(*this);
+}
+
+value_expression::value_expression(utils::database_type value)
+: value_(std::move(value)) {
+}
+
+void value_expression::accept(expression_visitor &visitor) const {
+  visitor.visit(*this);
+}
+
+void placeholder_expression::accept(expression_visitor &visitor) const {
+  visitor.visit(*this);
+}
+
+column_expression_ptr operator+(const table_column &col, utils::placeholder /*placeholder*/) {
+  return std::make_unique<binary_column_expression>(std::make_unique<table_column_expression>(col), binary_expression_operator::Plus, std::make_unique<placeholder_expression>());
+}
+
+column_expression_ptr operator+(utils::placeholder /*placeholder*/, const table_column &col) {
+  return std::make_unique<binary_column_expression>(std::make_unique<placeholder_expression>(), binary_expression_operator::Plus, std::make_unique<table_column_expression>(col));
+}
+
+column_expression_ptr operator-(const table_column &col, utils::placeholder /*placeholder*/) {
+  return std::make_unique<binary_column_expression>(std::make_unique<table_column_expression>(col), binary_expression_operator::Minus, std::make_unique<placeholder_expression>());
+}
+
+column_expression_ptr operator-(utils::placeholder /*placeholder*/, const table_column &col) {
+  return std::make_unique<binary_column_expression>(std::make_unique<placeholder_expression>(), binary_expression_operator::Minus, std::make_unique<table_column_expression>(col));
+}
+}

source/orm/query/intermediates/query_update_intermediate.cpp

@@ -9,13 +9,26 @@ query_update_intermediate::query_update_intermediate(const table& tab) {
   context_->parts.push_back(std::make_unique<internal::query_update_part>(tab));
 }
 
-query_set_intermediate query_update_intermediate::set(const std::initializer_list<internal::column_value_pair> columns) {
-  return set(std::vector<internal::column_value_pair>{columns});
+// query_set_intermediate query_update_intermediate::set(const std::initializer_list<internal::column_value_pair> columns) {
+  // return set(std::vector<internal::column_value_pair>{columns});
+// }
+
+// query_set_intermediate query_update_intermediate::set(std::vector<internal::column_value_pair> &&columns) {
+  // context_->parts.push_back(std::make_unique<internal::query_set_part>(std::move(columns)));
+  // return {context_};
+// }
+query_update_intermediate& query_update_intermediate::set(const table_column &col, column_expression_ptr expression) {
+  key_value_pairs_.emplace_back(col, std::move(expression));
+  return *this;
 }
 
-query_set_intermediate query_update_intermediate::set(std::vector<internal::column_value_pair> &&columns) {
-  context_->parts.push_back(std::make_unique<internal::query_set_part>(std::move(columns)));
+query_execute_where_intermediate query_update_intermediate::where(std::unique_ptr<abstract_criteria> cond) {
+  context_->parts.push_back(std::make_unique<internal::query_set_part>(std::move(key_value_pairs_)));
+  return where_clause(std::move(cond));
+}
+
+query_execute_where_intermediate query_update_intermediate::where_clause(std::unique_ptr<abstract_criteria> &&cond) {
+  context_->parts.push_back(std::make_unique<internal::query_where_part>(std::move(cond)));
   return {context_};
 }
-
-}
+}

source/orm/query/internal/column_value_pair.cpp

@@ -4,8 +4,8 @@
 
 namespace matador::query::internal {
 
-column_value_pair::column_value_pair(std::string name, utils::database_type value)
-: column_(std::move(name))
+column_value_pair::column_value_pair(const std::string& name, utils::database_type value)
+: column_(name)
 , value_(std::move(value)) {
 }
 
@@ -23,6 +23,11 @@ column_value_pair::column_value_pair( const char* name, utils::placeholder p )
 : column_(name)
 , value_(p) {}
 
+column_value_pair::column_value_pair(table_column col, column_expression_ptr expression)
+: column_(std::move(col))
+, expression_(std::move(expression)){
+}
+
 const table_column &column_value_pair::col() const {
   return column_;
 }

source/orm/query/internal/query_parts.cpp

@@ -350,9 +350,9 @@ void query_update_part::accept(query_part_visitor &visitor) {
   visitor.visit(*this);
 }
 
-query_set_part::query_set_part(const std::vector<column_value_pair> &key_value_pairs)
+query_set_part::query_set_part(std::vector<column_value_pair> &&key_value_pairs)
 : query_part(sql::dialect_token::Set)
-, key_value_pairs_(key_value_pairs) {
+, key_value_pairs_(std::move(key_value_pairs)) {
 }
 
 const std::vector<column_value_pair> &query_set_part::column_values() const {

source/orm/query/table_pk_generator.cpp

@@ -1,15 +1,17 @@
 #include "matador/query/table_pk_generator.hpp"
 #include "matador/query/query.hpp"
+#include "matador/query/criteria.hpp"
 #include "matador/query/error_code.hpp"
+#include "matador/query/internal/column_value_pair.hpp"
 
 namespace matador::query {
 table_pk_generator::table_pk_generator(const std::string& table_name, const std::string &sequence_name)
 : abstract_pk_generator(utils::generator_type::Table) {
 
-  // query::update(table_name)
-    // .set("next_id", "next_id + 1")
-    // .where("name", "=", table_name)
-    // .returning("next_id - 1 AS id");
+  query::update(table_name)
+    .set("next_id"_col, "next_id"_col + 1)
+    .where("name"_col == sequence_name)
+    .returning(("next_id"_col - 1));
   /*
   *UPDATE id_table
   SET next_id = next_id + 1