Avoid unnecessary double wrapping of SELECT statement when used as single function parameter.

internal/jet/literal_expression.go

@@ -375,9 +375,14 @@ type wrap struct {
 	expressions []Expression
 }
 
-func (n *wrap) serialize(statement StatementType, out *SQLBuilder, options ...SerializeOption) {
+func (n *wrap) serialize(statementType StatementType, out *SQLBuilder, options ...SerializeOption) {
 	out.WriteString("(")
-	serializeExpressionList(statement, n.expressions, ", ", out)
+
+	if len(n.expressions) == 1 {
+		options = append(options, NoWrap, Ident)
+	}
+	serializeExpressionList(statementType, n.expressions, ", ", out, options...)
+
 	out.WriteString(")")
 }
 

internal/jet/serializer.go

@@ -7,8 +7,10 @@ type SerializeOption int
 const (
 	NoWrap SerializeOption = iota
 	SkipNewLine
+	Ident
 
 	fallTroughOptions // fall trough options
+
 	ShortName
 )
 

internal/jet/statement.go

@@ -195,10 +195,19 @@ func (s *statementImpl) serialize(statement StatementType, out *SQLBuilder, opti
 		out.IncreaseIdent()
 	}
 
+	if contains(options, Ident) {
+		out.IncreaseIdent()
+	}
+
 	for _, clause := range s.Clauses {
 		clause.Serialize(statement, out, FallTrough(options)...)
 	}
 
+	if contains(options, Ident) {
+		out.DecreaseIdent()
+		out.NewLine()
+	}
+
 	if !contains(options, NoWrap) {
 		out.DecreaseIdent()
 		out.NewLine()

internal/jet/utils.go

@@ -21,14 +21,19 @@ func SerializeClauseList(statement StatementType, clauses []Serializer, out *SQL
 	}
 }
 
-func serializeExpressionList(statement StatementType, expressions []Expression, separator string, out *SQLBuilder) {
+func serializeExpressionList(
+	statement StatementType,
+	expressions []Expression,
+	separator string,
+	out *SQLBuilder,
+	options ...SerializeOption) {
 
-	for i, value := range expressions {
+	for i, expression := range expressions {
 		if i > 0 {
 			out.WriteString(separator)
 		}
 
-		value.serialize(statement, out)
+		expression.serialize(statement, out, options...)
 	}
 }
 

mysql/insert_statement_test.go

@@ -7,7 +7,6 @@ import (
 )
 
 func TestInvalidInsert(t *testing.T) {
-	assertStatementSqlErr(t, table1.INSERT(table1Col1), "jet: VALUES or QUERY has to be specified for INSERT statement")
 	assertStatementSqlErr(t, table1.INSERT(nil).VALUES(1), "jet: nil column in columns list")
 }
 

postgres/dialect_test.go

@@ -46,33 +46,33 @@ func TestExists(t *testing.T) {
 func TestIN(t *testing.T) {
 
 	assertSerialize(t, Float(1.11).IN(table1.SELECT(table1Col1)),
-		`($1 IN ((
+		`($1 IN (
      SELECT table1.col1 AS "table1.col1"
      FROM db.table1
-)))`, float64(1.11))
+))`, float64(1.11))
 
 	assertSerialize(t, ROW(Int(12), table1Col1).IN(table2.SELECT(table2Col3, table3Col1)),
-		`(ROW($1, table1.col1) IN ((
+		`(ROW($1, table1.col1) IN (
      SELECT table2.col3 AS "table2.col3",
           table3.col1 AS "table3.col1"
      FROM db.table2
-)))`, int64(12))
+))`, int64(12))
 }
 
 func TestNOT_IN(t *testing.T) {
 
 	assertSerialize(t, Float(1.11).NOT_IN(table1.SELECT(table1Col1)),
-		`($1 NOT IN ((
+		`($1 NOT IN (
      SELECT table1.col1 AS "table1.col1"
      FROM db.table1
-)))`, float64(1.11))
+))`, float64(1.11))
 
 	assertSerialize(t, ROW(Int(12), table1Col1).NOT_IN(table2.SELECT(table2Col3, table3Col1)),
-		`(ROW($1, table1.col1) NOT IN ((
+		`(ROW($1, table1.col1) NOT IN (
      SELECT table2.col3 AS "table2.col3",
           table3.col1 AS "table3.col1"
      FROM db.table2
-)))`, int64(12))
+))`, int64(12))
 }
 
 func TestReservedWordEscaped(t *testing.T) {

tests/mysql/alltypes_test.go

@@ -104,18 +104,18 @@ func TestExpressionOperators(t *testing.T) {
 SELECT all_types.'integer' IS NULL AS "result.is_null",
      all_types.date_ptr IS NOT NULL AS "result.is_not_null",
      (all_types.small_int_ptr IN (?, ?)) AS "result.in",
-     (all_types.small_int_ptr IN ((
+     (all_types.small_int_ptr IN (
           SELECT all_types.'integer' AS "all_types.integer"
           FROM test_sample.all_types
-     ))) AS "result.in_select",
+     )) AS "result.in_select",
      (CURRENT_USER()) AS "result.raw",
      (? + COALESCE(all_types.small_int_ptr, 0) + ?) AS "result.raw_arg",
      (? + all_types.integer + ? + ? + ? + ?) AS "result.raw_arg2",
      (all_types.small_int_ptr NOT IN (?, ?, NULL)) AS "result.not_in",
-     (all_types.small_int_ptr NOT IN ((
+     (all_types.small_int_ptr NOT IN (
           SELECT all_types.'integer' AS "all_types.integer"
           FROM test_sample.all_types
-     ))) AS "result.not_in_select"
+     )) AS "result.not_in_select"
 FROM test_sample.all_types
 LIMIT ?;
 `, "'", "`", -1), int64(11), int64(22), 78, 56, 11, 22, 11, 33, 44, int64(11), int64(22), int64(2))

tests/mysql/insert_test.go

@@ -278,7 +278,7 @@ ON DUPLICATE KEY UPDATE id = (id + ?),
 
 	err := SELECT(Link.AllColumns).
 		FROM(Link).
-		WHERE(Link.ID.EQ(Int(int64(randId)).ADD(Int(11)))).
+		WHERE(Link.ID.EQ(Int32(randId).ADD(Int(11)))).
 		Query(db, &newLinks)
 
 	require.NoError(t, err)

tests/mysql/update_test.go

@@ -121,7 +121,7 @@ func TestUpdateWithModelData(t *testing.T) {
 	stmt := Link.
 		UPDATE(Link.AllColumns).
 		MODEL(link).
-		WHERE(Link.ID.EQ(Int(int64(link.ID))))
+		WHERE(Link.ID.EQ(Int32(link.ID)))
 
 	expectedSQL := `
 UPDATE test_sample.link
@@ -131,7 +131,7 @@ SET id = ?,
     description = ?
 WHERE link.id = ?;
 `
-	testutils.AssertStatementSql(t, stmt, expectedSQL, int32(201), "http://www.duckduckgo.com", "DuckDuckGo", nil, int64(201))
+	testutils.AssertStatementSql(t, stmt, expectedSQL, int32(201), "http://www.duckduckgo.com", "DuckDuckGo", nil, int32(201))
 
 	testutils.AssertExec(t, stmt, db)
 	requireLogged(t, stmt)
@@ -152,7 +152,7 @@ func TestUpdateWithModelDataAndPredefinedColumnList(t *testing.T) {
 	stmt := Link.
 		UPDATE(updateColumnList).
 		MODEL(link).
-		WHERE(Link.ID.EQ(Int(int64(link.ID))))
+		WHERE(Link.ID.EQ(Int32(link.ID)))
 
 	var expectedSQL = `
 UPDATE test_sample.link
@@ -161,9 +161,8 @@ SET description = NULL,
     url = 'http://www.duckduckgo.com'
 WHERE link.id = 201;
 `
-	//fmt.Println(stmt.DebugSql())
 
-	testutils.AssertDebugStatementSql(t, stmt, expectedSQL, nil, "DuckDuckGo", "http://www.duckduckgo.com", int64(201))
+	testutils.AssertDebugStatementSql(t, stmt, expectedSQL, nil, "DuckDuckGo", "http://www.duckduckgo.com", int32(201))
 
 	testutils.AssertExec(t, stmt, db)
 	requireLogged(t, stmt)
@@ -181,7 +180,7 @@ func TestUpdateWithModelDataAndMutableColumns(t *testing.T) {
 	stmt := Link.
 		UPDATE(Link.MutableColumns).
 		MODEL(link).
-		WHERE(Link.ID.EQ(Int(int64(link.ID))))
+		WHERE(Link.ID.EQ(Int32(link.ID)))
 
 	var expectedSQL = `
 UPDATE test_sample.link
@@ -192,7 +191,7 @@ WHERE link.id = 201;
 `
 	//fmt.Println(stmt.DebugSql())
 
-	testutils.AssertDebugStatementSql(t, stmt, expectedSQL, "http://www.duckduckgo.com", "DuckDuckGo", nil, int64(201))
+	testutils.AssertDebugStatementSql(t, stmt, expectedSQL, "http://www.duckduckgo.com", "DuckDuckGo", nil, int32(201))
 	testutils.AssertExec(t, stmt, db)
 }
 

tests/postgres/alltypes_test.go

@@ -241,18 +241,18 @@ func TestExpressionOperators(t *testing.T) {
 SELECT all_types.integer IS NULL AS "result.is_null",
      all_types.date_ptr IS NOT NULL AS "result.is_not_null",
      (all_types.small_int_ptr IN ($1, $2)) AS "result.in",
-     (all_types.small_int_ptr IN ((
+     (all_types.small_int_ptr IN (
           SELECT all_types.integer AS "all_types.integer"
           FROM test_sample.all_types
-     ))) AS "result.in_select",
+     )) AS "result.in_select",
      (CURRENT_USER) AS "result.raw",
      ($3 + COALESCE(all_types.small_int_ptr, 0) + $4) AS "result.raw_arg",
      ($5 + all_types.integer + $6 + $5 + $7 + $8) AS "result.raw_arg2",
      (all_types.small_int_ptr NOT IN ($9, $10, NULL)) AS "result.not_in",
-     (all_types.small_int_ptr NOT IN ((
+     (all_types.small_int_ptr NOT IN (
           SELECT all_types.integer AS "all_types.integer"
           FROM test_sample.all_types
-     ))) AS "result.not_in_select"
+     )) AS "result.not_in_select"
 FROM test_sample.all_types
 LIMIT $11;
 `, int64(11), int64(22), 78, 56, 11, 22, 33, 44, int64(11), int64(22), int64(2))

tests/postgres/generator_test.go

@@ -5,6 +5,7 @@ import (
 	"io/ioutil"
 	"os"
 	"os/exec"
+	"path/filepath"
 	"reflect"
 	"testing"
 
@@ -368,16 +369,16 @@ func newActorInfoTableImpl(schemaName, tableName, alias string) actorInfoTable {
 `
 
 func TestGeneratedAllTypesSQLBuilderFiles(t *testing.T) {
-	enumDir := testRoot + ".gentestdata/jetdb/test_sample/enum/"
+	enumDir := filepath.Join(testRoot, "/.gentestdata/jetdb/test_sample/enum/")
-	modelDir := testRoot + ".gentestdata/jetdb/test_sample/model/"
+	modelDir := filepath.Join(testRoot, "/.gentestdata/jetdb/test_sample/model/")
-	tableDir := testRoot + ".gentestdata/jetdb/test_sample/table/"
+	tableDir := filepath.Join(testRoot, "/.gentestdata/jetdb/test_sample/table/")
 
 	enumFiles, err := ioutil.ReadDir(enumDir)
 	require.NoError(t, err)
 
 	testutils.AssertFileNamesEqual(t, enumFiles, "mood.go", "level.go")
-	testutils.AssertFileContent(t, enumDir+"mood.go", moodEnumContent)
+	testutils.AssertFileContent(t, enumDir+"/mood.go", moodEnumContent)
-	testutils.AssertFileContent(t, enumDir+"level.go", levelEnumContent)
+	testutils.AssertFileContent(t, enumDir+"/level.go", levelEnumContent)
 
 	modelFiles, err := ioutil.ReadDir(modelDir)
 	require.NoError(t, err)
@@ -385,7 +386,7 @@ func TestGeneratedAllTypesSQLBuilderFiles(t *testing.T) {
 	testutils.AssertFileNamesEqual(t, modelFiles, "all_types.go", "all_types_view.go", "employee.go", "link.go",
 		"mood.go", "person.go", "person_phone.go", "weird_names_table.go", "level.go", "user.go", "floats.go")
 
-	testutils.AssertFileContent(t, modelDir+"all_types.go", allTypesModelContent)
+	testutils.AssertFileContent(t, modelDir+"/all_types.go", allTypesModelContent)
 
 	tableFiles, err := ioutil.ReadDir(tableDir)
 	require.NoError(t, err)
@@ -393,7 +394,7 @@ func TestGeneratedAllTypesSQLBuilderFiles(t *testing.T) {
 	testutils.AssertFileNamesEqual(t, tableFiles, "all_types.go", "employee.go", "link.go",
 		"person.go", "person_phone.go", "weird_names_table.go", "user.go", "floats.go")
 
-	testutils.AssertFileContent(t, tableDir+"all_types.go", allTypesTableContent)
+	testutils.AssertFileContent(t, tableDir+"/all_types.go", allTypesTableContent)
 }
 
 var moodEnumContent = `

tests/postgres/insert_test.go

@@ -140,8 +140,7 @@ ON CONFLICT ON CONSTRAINT employee_pkey DO NOTHING;
 				Link.ID.SET(Link.EXCLUDED.ID),
 				Link.URL.SET(String("http://www.postgresqltutorial2.com")),
 			),
-		).
+		).RETURNING(Link.AllColumns)
-			RETURNING(Link.AllColumns)
 
 		testutils.AssertStatementSql(t, stmt, `
 INSERT INTO test_sample.link (id, url, name, description)

tests/postgres/main_test.go

@@ -4,10 +4,9 @@ import (
 	"context"
 	"database/sql"
 	"fmt"
+	"github.com/go-jet/jet/v2/tests/internal/utils/repo"
 	"math/rand"
 	"os"
-	"os/exec"
-	"strings"
 	"testing"
 	"time"
 
@@ -53,13 +52,7 @@ func TestMain(m *testing.M) {
 }
 
 func setTestRoot() {
-	cmd := exec.Command("git", "rev-parse", "--show-toplevel")
+	testRoot = repo.GetTestsDirPath()
-	byteArr, err := cmd.Output()
-	if err != nil {
-		panic(err)
-	}
-
-	testRoot = strings.TrimSpace(string(byteArr)) + "/tests/"
 }
 
 var loggedSQL string

tests/postgres/select_test.go

@@ -75,11 +75,12 @@ LIMIT 30;
 	query := SELECT(
 		Payment.AllColumns,
 		Customer.AllColumns,
-	).
+	).FROM(
-		FROM(Payment.
+		Payment.
-			INNER_JOIN(Customer, Payment.CustomerID.EQ(Customer.CustomerID))).
+			INNER_JOIN(Customer, Payment.CustomerID.EQ(Customer.CustomerID)),
-		ORDER_BY(Payment.PaymentID.ASC()).
+	).ORDER_BY(
-		LIMIT(30)
+		Payment.PaymentID.ASC(),
+	).LIMIT(30)
 
 	testutils.AssertDebugStatementSql(t, query, expectedSQL, int64(30))
 

tests/postgres/update_test.go

@@ -259,14 +259,14 @@ func TestUpdateWithModelData(t *testing.T) {
 	stmt := Link.
 		UPDATE(Link.AllColumns).
 		MODEL(link).
-		WHERE(Link.ID.EQ(Int(int64(link.ID))))
+		WHERE(Link.ID.EQ(Int32(link.ID)))
 
 	expectedSQL := `
 UPDATE test_sample.link
 SET (id, url, name, description) = (201, 'http://www.duckduckgo.com', 'DuckDuckGo', NULL)
 WHERE link.id = 201;
 `
-	testutils.AssertDebugStatementSql(t, stmt, expectedSQL, int32(201), "http://www.duckduckgo.com", "DuckDuckGo", nil, int64(201))
+	testutils.AssertDebugStatementSql(t, stmt, expectedSQL, int32(201), "http://www.duckduckgo.com", "DuckDuckGo", nil, int32(201))
 
 	AssertExec(t, stmt, 1)
 }
@@ -286,14 +286,14 @@ func TestUpdateWithModelDataAndPredefinedColumnList(t *testing.T) {
 	stmt := Link.
 		UPDATE(updateColumnList).
 		MODEL(link).
-		WHERE(Link.ID.EQ(Int(int64(link.ID))))
+		WHERE(Link.ID.EQ(Int32(link.ID)))
 
 	var expectedSQL = `
 UPDATE test_sample.link
 SET (description, name, url) = (NULL, 'DuckDuckGo', 'http://www.duckduckgo.com')
 WHERE link.id = 201;
 `
-	testutils.AssertDebugStatementSql(t, stmt, expectedSQL, nil, "DuckDuckGo", "http://www.duckduckgo.com", int64(201))
+	testutils.AssertDebugStatementSql(t, stmt, expectedSQL, nil, "DuckDuckGo", "http://www.duckduckgo.com", int32(201))
 
 	AssertExec(t, stmt, 1)
 }

tests/postgres/with_test.go

@@ -22,14 +22,17 @@ func TestWithRegionalSales(t *testing.T) {
 			SELECT(
 				Orders.ShipRegion,
 				SUM(OrderDetails.Quantity).AS(regionalSalesTotalSales.Name()),
-			).
+			).FROM(
-				FROM(Orders.INNER_JOIN(OrderDetails, OrderDetails.OrderID.EQ(Orders.OrderID))).
+				Orders.INNER_JOIN(OrderDetails, OrderDetails.OrderID.EQ(Orders.OrderID)),
-				GROUP_BY(Orders.ShipRegion),
+			).GROUP_BY(Orders.ShipRegion),
 		),
 		topRegion.AS(
-			SELECT(regionalSalesShipRegion).
+			SELECT(
-				FROM(regionalSales).
+				regionalSalesShipRegion,
-				WHERE(regionalSalesTotalSales.GT(
+			).FROM(
+				regionalSales,
+			).WHERE(
+				regionalSalesTotalSales.GT(
 					IntExp(
 						SELECT(SUM(regionalSalesTotalSales)).
 							FROM(regionalSales),
@@ -43,13 +46,17 @@ func TestWithRegionalSales(t *testing.T) {
 			OrderDetails.ProductID,
 			COUNT(STAR).AS("product_units"),
 			SUM(OrderDetails.Quantity).AS("product_sales"),
-		).
+		).FROM(
-			FROM(Orders.INNER_JOIN(OrderDetails, Orders.OrderID.EQ(OrderDetails.OrderID))).
+			Orders.
-			WHERE(Orders.ShipRegion.IN(
+				INNER_JOIN(OrderDetails, Orders.OrderID.EQ(OrderDetails.OrderID)),
-				topRegion.SELECT(topRegionShipRegion)),
+		).WHERE(
-			).
+			Orders.ShipRegion.IN(topRegion.SELECT(topRegionShipRegion)),
-			GROUP_BY(Orders.ShipRegion, OrderDetails.ProductID).
+		).GROUP_BY(
-			ORDER_BY(SUM(OrderDetails.Quantity).DESC()),
+			Orders.ShipRegion,
+			OrderDetails.ProductID,
+		).ORDER_BY(
+			SUM(OrderDetails.Quantity).DESC(),
+		),
 	)
 
 	//fmt.Println(stmt.DebugSql())
@@ -75,10 +82,10 @@ SELECT orders.ship_region AS "orders.ship_region",
      SUM(order_details.quantity) AS "product_sales"
 FROM northwind.orders
      INNER JOIN northwind.order_details ON (orders.order_id = order_details.order_id)
-WHERE orders.ship_region IN ((
+WHERE orders.ship_region IN (
           SELECT top_region."orders.ship_region" AS "orders.ship_region"
           FROM top_region
-     ))
+     )
 GROUP BY orders.ship_region, order_details.product_id
 ORDER BY SUM(order_details.quantity) DESC;
 `)
@@ -141,19 +148,19 @@ func TestWithStatementDeleteAndInsert(t *testing.T) {
 	testutils.AssertStatementSql(t, stmt, `
 WITH remove_discontinued_orders AS (
      DELETE FROM northwind.order_details
-     WHERE order_details.product_id IN ((
+     WHERE order_details.product_id IN (
                SELECT products.product_id AS "products.product_id"
                FROM northwind.products
                WHERE products.discontinued = $1
-          ))
+          )
      RETURNING order_details.product_id AS "order_details.product_id"
 ),update_discontinued_price AS (
      UPDATE northwind.products
      SET unit_price = $2
-     WHERE products.product_id IN ((
+     WHERE products.product_id IN (
                SELECT remove_discontinued_orders."order_details.product_id" AS "order_details.product_id"
                FROM remove_discontinued_orders
-          ))
+          )
      RETURNING products.product_id AS "products.product_id",
                products.product_name AS "products.product_name",
                products.supplier_id AS "products.supplier_id",