Gleipnir/jet
4
0
Fork 0
Code Issues Pull requests Projects Releases 1 Packages Wiki Activity Actions

[PostgreSQL] Add support for WITH statements and Common Table Expressions.

Browse source
This commit is contained in:
go-jet 2020-05-24 17:56:17 +02:00
parent fb8607da29
commit 8aa894730c
10 changed files with 60 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

18
postgres/set_statement.go
View file

@ -4,37 +4,37 @@ import "github.com/go-jet/jet/internal/jet"
// UNION effectively appends the result of sub-queries(select statements) into single query.
// It eliminates duplicate rows from its result.
func UNION(lhs, rhs jet.StatementWithProjections, selects ...jet.StatementWithProjections) setStatement {
func UNION(lhs, rhs jet.SerializerStatement, selects ...jet.SerializerStatement) setStatement {
return newSetStatementImpl(union, false, toSelectList(lhs, rhs, selects...))
}
// UNION_ALL effectively appends the result of sub-queries(select statements) into single query.
// It does not eliminates duplicate rows from its result.
func UNION_ALL(lhs, rhs jet.StatementWithProjections, selects ...jet.StatementWithProjections) setStatement {
func UNION_ALL(lhs, rhs jet.SerializerStatement, selects ...jet.SerializerStatement) setStatement {
return newSetStatementImpl(union, true, toSelectList(lhs, rhs, selects...))
}
// INTERSECT returns all rows that are in query results.
// It eliminates duplicate rows from its result.
func INTERSECT(lhs, rhs jet.StatementWithProjections, selects ...jet.StatementWithProjections) setStatement {
func INTERSECT(lhs, rhs jet.SerializerStatement, selects ...jet.SerializerStatement) setStatement {
return newSetStatementImpl(intersect, false, toSelectList(lhs, rhs, selects...))
}
// INTERSECT_ALL returns all rows that are in query results.
// It does not eliminates duplicate rows from its result.
func INTERSECT_ALL(lhs, rhs jet.StatementWithProjections, selects ...jet.StatementWithProjections) setStatement {
func INTERSECT_ALL(lhs, rhs jet.SerializerStatement, selects ...jet.SerializerStatement) setStatement {
return newSetStatementImpl(intersect, true, toSelectList(lhs, rhs, selects...))
}
// EXCEPT returns all rows that are in the result of query lhs but not in the result of query rhs.
// It eliminates duplicate rows from its result.
func EXCEPT(lhs, rhs jet.StatementWithProjections) setStatement {
func EXCEPT(lhs, rhs jet.SerializerStatement) setStatement {
return newSetStatementImpl(except, false, toSelectList(lhs, rhs))
}
// EXCEPT_ALL returns all rows that are in the result of query lhs but not in the result of query rhs.
// It does not eliminates duplicate rows from its result.
func EXCEPT_ALL(lhs, rhs jet.StatementWithProjections) setStatement {
func EXCEPT_ALL(lhs, rhs jet.SerializerStatement) setStatement {
return newSetStatementImpl(except, true, toSelectList(lhs, rhs))
}
@ -98,7 +98,7 @@ type setStatementImpl struct {
setOperator jet.ClauseSetStmtOperator
}
func newSetStatementImpl(operator string, all bool, selects []jet.StatementWithProjections) setStatement {
func newSetStatementImpl(operator string, all bool, selects []jet.SerializerStatement) setStatement {
newSetStatement := &setStatementImpl{}
newSetStatement.ExpressionStatement = jet.NewExpressionStatementImpl(Dialect, jet.SetStatementType, newSetStatement,
&newSetStatement.setOperator)
@ -139,6 +139,6 @@ const (
except = "EXCEPT"
)
func toSelectList(lhs, rhs jet.StatementWithProjections, selects ...jet.StatementWithProjections) []jet.StatementWithProjections {
return append([]jet.StatementWithProjections{lhs, rhs}, selects...)
func toSelectList(lhs, rhs jet.SerializerStatement, selects ...jet.SerializerStatement) []jet.SerializerStatement {
return append([]jet.SerializerStatement{lhs, rhs}, selects...)
}