// CompileN1QLExpression will take expressions defined in N1QL's DDL statement
// and compile them for evaluation.
func CompileN1QLExpression(expressions []string) ([]interface{}, error) {
cExprs := make([]interface{}, 0, len(expressions))
for _, expr := range expressions {
cExpr, err := ast.UnmarshalExpression([]byte(expr))
if err != nil {
return nil, err
}
cExprs = append(cExprs, cExpr)
}
return cExprs, nil
}
func loadViewIndexes(b *bucket) ([]*catalog.Index, error) {
rows, err := b.cbbucket.GetDDocs()
if err != nil {
return nil, err
}
inames := make([]string, 0, len(rows.Rows))
for _, row := range rows.Rows {
cdoc := row.DDoc
id := cdoc.Meta["id"].(string)
if !strings.HasPrefix(id, "_design/ddl_") {
continue
}
iname := strings.TrimPrefix(id, "_design/ddl_")
inames = append(inames, iname)
}
indexes := make([]*catalog.Index, 0, len(inames))
for _, iname := range inames {
ddname := "ddl_" + iname
jdoc, err := getDesignDoc(b, ddname)
if err != nil {
return nil, err
}
jview, ok := jdoc.Views[iname]
if !ok {
return nil, errors.New("Missing view for index " + iname)
}
exprlist := make([]ast.Expression, 0, len(jdoc.IndexOn))
for _, ser := range jdoc.IndexOn {
// HACK - remove this when Unmarshall supports META()
if iname == PRIMARY_INDEX {
meta := ast.NewFunctionCall("meta", ast.FunctionArgExpressionList{})
mdid := ast.NewDotMemberOperator(meta, ast.NewProperty("id"))
exprlist = append(exprlist, mdid)
} else {
expr, err := ast.UnmarshalExpression([]byte(ser))
if err != nil {
return nil, errors.New("Cannot unmarshal expression for index " + iname)
}
exprlist = append(exprlist, expr)
}
}
if len(exprlist) != len(jdoc.IndexOn) {
continue
}
ddoc := designdoc{
name: ddname,
viewname: iname,
mapfn: jview.Map,
reducefn: jview.Reduce,
}
if ddoc.checksum() != jdoc.IndexChecksum {
return nil, errors.New("Warning - checksum failed on index " + iname)
}
var index catalog.Index
if iname == PRIMARY_INDEX {
index = &primaryIndex{
viewIndex{
name: iname,
bucket: b,
using: catalog.VIEW,
ddoc: &ddoc,
on: exprlist,
},
}
indexes = append(indexes, &index)
} else {
index = &viewIndex{
name: iname,
bucket: b,
using: catalog.VIEW,
ddoc: &ddoc,
on: exprlist,
}
indexes = append(indexes, &index)
}
}
return indexes, nil
}