Add RawStatement support

RawStatement method creates new sql statements from raw query and optional map of named arguments.

internal/jet/literal_expression.go

@@ -2,8 +2,6 @@ package jet
 
 import (
 	"fmt"
-	"sort"
-	"strings"
 	"time"
 )
 
@@ -402,71 +400,15 @@ type rawExpression struct {
 }
 
 func (n *rawExpression) serialize(statement StatementType, out *SQLBuilder, options ...SerializeOption) {
-	raw := n.Raw
-
-	type namedArgumentPosition struct {
-		Name     string
-		Value    interface{}
-		Position int
+	if !n.noWrap && !contains(options, NoWrap) {
+		out.WriteByte('(')
 	}
 
-	var namedArgumentPositions []namedArgumentPosition
-
-	for namedArg, value := range n.NamedArgument {
-		rawCopy := n.Raw
-		rawIndex := 0
-		exists := false
-
-		// one named argument can occur multiple times inside raw string
-		for {
-			index := strings.Index(rawCopy, namedArg)
-			if index == -1 {
-				break
-			}
-
-			exists = true
-			namedArgumentPositions = append(namedArgumentPositions, namedArgumentPosition{
-				Name:     namedArg,
-				Value:    value,
-				Position: rawIndex + index,
-			})
-
-			rawCopy = rawCopy[index+len(namedArg):]
-			rawIndex += index + len(namedArg)
-		}
-
-		if !exists {
-			panic("jet: named argument '" + namedArg + "' does not appear in raw query")
-		}
-	}
-
-	sort.Slice(namedArgumentPositions, func(i, j int) bool {
-		return namedArgumentPositions[i].Position < namedArgumentPositions[j].Position
-	})
-
-	for _, namedArgumentPos := range namedArgumentPositions {
-		// if named argument does not exists in raw string do not add argument to the list of arguments
-		// It can happen if the same argument occurs multiple times in postgres query.
-		if !strings.Contains(raw, namedArgumentPos.Name) {
-			continue
-		}
-		out.Args = append(out.Args, namedArgumentPos.Value)
-		currentArgNum := len(out.Args)
-
-		dialectPlaceholder := out.Dialect.ArgumentPlaceholder()(currentArgNum)
-		// if placeholder is not unique identifier ($1, $2, etc..), we will replace just one occurence of the argument
-		toReplace := -1 // all occurrences
-		if dialectPlaceholder == "?" {
-			toReplace = 1 // just one occurrence
-		}
-		raw = strings.Replace(raw, namedArgumentPos.Name, dialectPlaceholder, toReplace)
-	}
+	out.insertRawQuery(n.Raw, n.NamedArgument)
 
 	if !n.noWrap && !contains(options, NoWrap) {
-		raw = "(" + raw + ")"
+		out.WriteByte(')')
 	}
-
-	out.WriteString(raw)
 }
 
 // Raw can be used for any unsupported functions, operators or expressions.

internal/jet/raw_statement.go

@@ -0,0 +1,47 @@
+package jet
+
+type rawStatementImpl struct {
+	serializerStatementInterfaceImpl
+
+	RawQuery       string
+	NamedArguments map[string]interface{}
+}
+
+// RawStatement creates new sql statements from raw query and optional map of named arguments
+func RawStatement(dialect Dialect, rawQuery string, namedArgument ...map[string]interface{}) Statement {
+	newRawStatement := rawStatementImpl{
+		serializerStatementInterfaceImpl: serializerStatementInterfaceImpl{
+			dialect:       dialect,
+			statementType: "",
+			parent:        nil,
+		},
+		RawQuery: rawQuery,
+	}
+
+	if len(namedArgument) > 0 {
+		newRawStatement.NamedArguments = namedArgument[0]
+	}
+
+	newRawStatement.parent = &newRawStatement
+
+	return &newRawStatement
+}
+
+func (s *rawStatementImpl) projections() ProjectionList {
+	return nil
+}
+
+func (s *rawStatementImpl) serialize(statement StatementType, out *SQLBuilder, options ...SerializeOption) {
+	if !contains(options, NoWrap) {
+		out.WriteString("(")
+		out.IncreaseIdent()
+	}
+
+	out.insertRawQuery(s.RawQuery, s.NamedArguments)
+
+	if !contains(options, NoWrap) {
+		out.DecreaseIdent()
+		out.NewLine()
+		out.WriteString(")")
+	}
+}

internal/jet/sql_builder.go

@@ -7,6 +7,7 @@ import (
 	"github.com/go-jet/jet/v2/internal/utils"
 	"github.com/google/uuid"
 	"reflect"
+	"sort"
 	"strconv"
 	"strings"
 	"time"
@@ -135,6 +136,73 @@ func (s *SQLBuilder) insertParametrizedArgument(arg interface{}) {
 	s.WriteString(argPlaceholder)
 }
 
+func (s *SQLBuilder) insertRawQuery(raw string, namedArg map[string]interface{}) {
+	type namedArgumentPosition struct {
+		Name     string
+		Value    interface{}
+		Position int
+	}
+
+	var namedArgumentPositions []namedArgumentPosition
+
+	for namedArg, value := range namedArg {
+		rawCopy := raw
+		rawIndex := 0
+		exists := false
+
+		// one named argument can occur multiple times inside raw string
+		for {
+			index := strings.Index(rawCopy, namedArg)
+			if index == -1 {
+				break
+			}
+
+			exists = true
+			namedArgumentPositions = append(namedArgumentPositions, namedArgumentPosition{
+				Name:     namedArg,
+				Value:    value,
+				Position: rawIndex + index,
+			})
+
+			rawCopy = rawCopy[index+len(namedArg):]
+			rawIndex += index + len(namedArg)
+		}
+
+		if !exists {
+			panic("jet: named argument '" + namedArg + "' does not appear in raw query")
+		}
+	}
+
+	sort.Slice(namedArgumentPositions, func(i, j int) bool {
+		return namedArgumentPositions[i].Position < namedArgumentPositions[j].Position
+	})
+
+	for _, namedArgumentPos := range namedArgumentPositions {
+		// if named argument does not exists in raw string do not add argument to the list of arguments
+		// It can happen if the same argument occurs multiple times in postgres query.
+		if !strings.Contains(raw, namedArgumentPos.Name) {
+			continue
+		}
+		s.Args = append(s.Args, namedArgumentPos.Value)
+		currentArgNum := len(s.Args)
+
+		placeholder := s.Dialect.ArgumentPlaceholder()(currentArgNum)
+		// if placeholder is not unique identifier ($1, $2, etc..), we will replace just one occurrence of the argument
+		toReplace := -1 // all occurrences
+		if placeholder == "?" {
+			toReplace = 1 // just one occurrence
+		}
+
+		if s.Debug {
+			placeholder = argToString(namedArgumentPos.Value)
+		}
+
+		raw = strings.Replace(raw, namedArgumentPos.Name, placeholder, toReplace)
+	}
+
+	s.WriteString(raw)
+}
+
 func argToString(value interface{}) string {
 	if utils.IsNil(value) {
 		return "NULL"