Create table.go

table.go

@@ -0,0 +1,110 @@
+package eorm
+
+type TableReference interface {
+}
+
+// Table 普通表
+type Table struct {
+	entity any
+	alias  string
+}
+
+func TableOf(entity any) Table {
+	return Table{
+		entity: entity,
+	}
+}
+
+func (t Table) Join(right TableReference) *JoinBuilder {
+	return &JoinBuilder{
+		left:  t,
+		right: right,
+		typ:   "JOIN",
+	}
+}
+
+func (t Table) LeftJoin(right TableReference) *JoinBuilder {
+	return &JoinBuilder{
+		left:  t,
+		right: right,
+		typ:   "LEFT JOIN",
+	}
+}
+
+func (t Table) RightJoin(right TableReference) *JoinBuilder {
+	return &JoinBuilder{
+		left:  t,
+		right: right,
+		typ:   "RIGHT JOIN",
+	}
+}
+
+func (t Table) As(alias string) Table {
+	return Table{
+		entity: t.entity,
+		alias:  alias,
+	}
+}
+
+func (t Table) C(name string) Column {
+	return Column{
+		name:  name,
+		table: t,
+	}
+}
+
+type Join struct {
+	left  TableReference
+	right TableReference
+	on    []Predicate
+	using []string
+	typ   string
+}
+
+func (j Join) Join(reference TableReference) *JoinBuilder {
+	return &JoinBuilder{
+		left:  j,
+		right: reference,
+		typ:   "JOIN",
+	}
+}
+
+func (j Join) LeftJoin(reference TableReference) *JoinBuilder {
+	return &JoinBuilder{
+		left:  j,
+		right: reference,
+		typ:   "LEFT JOIN",
+	}
+}
+
+func (j Join) RightJoin(reference TableReference) *JoinBuilder {
+	return &JoinBuilder{
+		left:  j,
+		right: reference,
+		typ:   "RIGHT JOIN",
+	}
+}
+
+type JoinBuilder struct {
+	left  TableReference
+	right TableReference
+	typ   string
+}
+
+func (j *JoinBuilder) On(ps ...Predicate) Join {
+	return Join{
+		left:  j.left,
+		right: j.right,
+		typ:   j.typ,
+		on:    ps,
+	}
+}
+
+func (j *JoinBuilder) Using(cols ...string) Join {
+	return Join{
+		left:  j.left,
+		right: j.right,
+		typ:   j.typ,
+		using: cols,
+	}
+}