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Add hash-based indexes

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This commit is contained in:
Barak Michener 2015-08-07 14:35:24 -04:00
parent c98318aa97
commit ab3f59d21f
5 changed files with 95 additions and 44 deletions
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13
graph/sql/sql_node_intersection.go
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@ -69,6 +69,9 @@ func (n *SQLNodeIntersection) Describe() string {
func (n *SQLNodeIntersection) buildResult(result []string, cols []string) map[string]string {
m := make(map[string]string)
for i, c := range cols {
if strings.HasSuffix(c, "_hash") {
continue
}
if c == "__execd" {
n.result = result[i]
}
@ -100,7 +103,7 @@ func (n *SQLNodeIntersection) buildSubqueries() []tableDef {
for i, it := range n.nodeIts {
var td tableDef
var table string
table, td.values = it.buildSQL(true, nil)
table, td.values = it.buildSQL(true, nil, true)
td.table = fmt.Sprintf("\n(%s)", table[:len(table)-1])
td.name = n.nodetables[i]
out = append(out, td)
@ -150,13 +153,13 @@ func (n *SQLNodeIntersection) buildWhere() (string, []string) {
var q []string
var vals []string
for _, tb := range n.nodetables[1:] {
q = append(q, fmt.Sprintf("%s.__execd = %s.__execd", n.nodetables[0], tb))
q = append(q, fmt.Sprintf("%s.__execd_hash = %s.__execd_hash", n.nodetables[0], tb))
}
query := strings.Join(q, " AND ")
return query, vals
}
func (n *SQLNodeIntersection) buildSQL(next bool, val graph.Value) (string, []string) {
func (n *SQLNodeIntersection) buildSQL(next bool, val graph.Value, _ bool) (string, []string) {
topData := n.tableID()
tags := []tagDir{topData}
tags = append(tags, n.getTags()...)
@ -184,8 +187,8 @@ func (n *SQLNodeIntersection) buildSQL(next bool, val graph.Value) (string, []st
if constraint != "" {
constraint += " AND "
}
constraint += fmt.Sprintf("%s.%s = ?", topData.table, topData.dir)
values = append(values, v)
constraint += fmt.Sprintf("%s.%s_hash = ?", topData.table, topData.dir)
values = append(values, hashOf(v))
}
query += constraint
query += ";"