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compat.go
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compat.go
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package compiler
import (
"fmt"
"strings"
"github.com/kyleconroy/sqlc/internal/sql/ast"
"github.com/kyleconroy/sqlc/internal/sql/astutils"
)
// This is mainly copy-pasted from internal/postgresql/parse.go
func stringSlice(list *ast.List) []string {
items := []string{}
for _, item := range list.Items {
if n, ok := item.(*ast.String); ok {
items = append(items, n.Str)
continue
}
if n, ok := item.(*ast.String); ok {
items = append(items, n.Str)
continue
}
}
return items
}
type Relation struct {
Catalog string
Schema string
Name string
}
func parseRelation(node ast.Node) (*Relation, error) {
switch n := node.(type) {
case *ast.List:
parts := stringSlice(n)
switch len(parts) {
case 1:
return &Relation{
Name: parts[0],
}, nil
case 2:
return &Relation{
Schema: parts[0],
Name: parts[1],
}, nil
case 3:
return &Relation{
Catalog: parts[0],
Schema: parts[1],
Name: parts[2],
}, nil
default:
return nil, fmt.Errorf("invalid name: %s", astutils.Join(n, "."))
}
case *ast.RangeVar:
name := Relation{}
if n.Catalogname != nil {
name.Catalog = *n.Catalogname
}
if n.Schemaname != nil {
name.Schema = *n.Schemaname
}
if n.Relname != nil {
name.Name = *n.Relname
}
return &name, nil
case *ast.TypeName:
return parseRelation(n.Names)
default:
return nil, fmt.Errorf("unexpected node type: %T", n)
}
}
func ParseTableName(node ast.Node) (*ast.TableName, error) {
rel, err := parseRelation(node)
if err != nil {
return nil, fmt.Errorf("parse table name: %w", err)
}
return &ast.TableName{
Catalog: rel.Catalog,
Schema: rel.Schema,
Name: rel.Name,
}, nil
}
func ParseTypeName(node ast.Node) (*ast.TypeName, error) {
rel, err := parseRelation(node)
if err != nil {
return nil, fmt.Errorf("parse table name: %w", err)
}
return &ast.TypeName{
Catalog: rel.Catalog,
Schema: rel.Schema,
Name: rel.Name,
}, nil
}
func ParseRelationString(name string) (*Relation, error) {
parts := strings.Split(name, ".")
switch len(parts) {
case 1:
return &Relation{
Name: parts[0],
}, nil
case 2:
return &Relation{
Schema: parts[0],
Name: parts[1],
}, nil
case 3:
return &Relation{
Catalog: parts[0],
Schema: parts[1],
Name: parts[2],
}, nil
default:
return nil, fmt.Errorf("invalid name: %s", name)
}
}