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bytebase_pg_query.go
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/
bytebase_pg_query.go
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package pg_query
import (
"fmt"
"github.com/pganalyze/pg_query_go/v5/parser"
"google.golang.org/protobuf/proto"
)
type DeparseType int
const (
DeparseTypeExpr DeparseType = iota
DeparseTypeExclusion
DeparseTypeDataType
)
func DeparseNode(tp DeparseType, node *Node) (output string, err error) {
switch tp {
case DeparseTypeExpr:
case DeparseTypeDataType:
default:
return "", fmt.Errorf("deparse node failed: unsupported deparse type %d", tp)
}
tree := &ParseResult{
Stmts: []*RawStmt{
{
Stmt: node,
},
},
}
protobufTree, err := proto.Marshal(tree)
if err != nil {
return "", err
}
return parser.DeparseNodeFromProtobuf(int(tp), protobufTree)
}
func DeparseNodes(tp DeparseType, nodes []*Node) (output string, err error) {
switch tp {
case DeparseTypeExclusion:
tree := &ParseResult{}
for _, node := range nodes {
tree.Stmts = append(tree.Stmts, &RawStmt{
Stmt: node,
})
}
protobufTree, err := proto.Marshal(tree)
if err != nil {
return "", err
}
return parser.DeparseNodeFromProtobuf(int(tp), protobufTree)
default:
return "", fmt.Errorf("deparse node failed: unsupported deparse type %d", tp)
}
}