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MSSQL rows limit/offset via TOP or OFFSET ... FETCH NEXT ... ROWS

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This commit is contained in:
Sergey Kurt 2017-03-14 11:13:56 +03:00
parent e2f32e746e
commit cbdbe4891a
9 changed files with 54 additions and 6 deletions

31
queries/query_builders.go
View file

@ -46,6 +46,12 @@ func buildSelectQuery(q *Query) (*bytes.Buffer, []interface{}) {
buf.WriteString("SELECT ")
if q.dialect.UseTopClause {
if q.limit != 0 && q.offset == 0 {
fmt.Fprintf(buf, " TOP (%d)", q.limit)
}
}
if q.count {
buf.WriteString("COUNT(")
}
@ -308,11 +314,26 @@ func writeModifiers(q *Query, buf *bytes.Buffer, args *[]interface{}) {
buf.WriteString(strings.Join(q.orderBy, ", "))
}
if q.limit != 0 {
fmt.Fprintf(buf, " LIMIT %d", q.limit)
}
if q.offset != 0 {
fmt.Fprintf(buf, " OFFSET %d", q.offset)
if !q.dialect.UseTopClause {
if q.limit != 0 {
fmt.Fprintf(buf, " LIMIT %d", q.limit)
}
if q.offset != 0 {
fmt.Fprintf(buf, " OFFSET %d", q.offset)
}
} else {
// From MS SQL 2012 and above: https://technet.microsoft.com/en-us/library/ms188385(v=sql.110).aspx
// ORDER BY ...
// OFFSET N ROWS
// FETCH NEXT M ROWS ONLY
if q.offset != 0 {
fmt.Fprintf(buf, " OFFSET %d", q.offset)
if q.limit != 0 {
fmt.Fprintf(buf, " FETCH NEXT %d ROWS ONLY", q.limit)
}
}
}
if len(q.forlock) != 0 {