refactor: use dialect-neutral Jet type aliases

Replace mysql/postgres intersection interfaces with mysql type aliases
per go-jet/jet#555 and generalize Apply/Expr signatures.

Co-authored-by: Cursor <cursoragent@cursor.com>

apply.go

@@ -3,7 +3,6 @@ package dbx
 import (
 	"reflect"
 
-	"github.com/go-jet/jet/v2/mysql"
 	"golang.org/x/exp/constraints"
 )
 
@@ -19,8 +18,8 @@ type ApplyInterface[T any] interface {
 func ApplyPtr[T constraints.Float | constraints.Integer | string | bool](
 	existing *T,
 	newVal *T,
-	updatedColumns *mysql.ColumnList,
+	updatedColumns *ColumnList,
-	targetColumn mysql.Column,
+	targetColumn Column,
 ) *T {
 	if newVal == nil {
 		return existing
@@ -46,8 +45,8 @@ func ApplyComplexPtr[
 ](
 	existing *Existing,
 	newVal *New,
-	updatedColumns *mysql.ColumnList,
+	updatedColumns *ColumnList,
-	targetColumn mysql.Column,
+	targetColumn Column,
 ) *Existing {
 	if newVal == nil {
 		return existing
@@ -73,8 +72,8 @@ func ApplyComplexPtr[
 func ApplyInterfacePtr[T ApplyInterface[T]](
 	existing *T,
 	newVal *T,
-	updatedColumns *mysql.ColumnList,
+	updatedColumns *ColumnList,
-	targetColumn mysql.Column,
+	targetColumn Column,
 ) *T {
 	if newVal == nil {
 		return existing
@@ -98,8 +97,8 @@ func ApplyInterfacePtr[T ApplyInterface[T]](
 func ApplyVal[T constraints.Float | constraints.Integer | string | bool](
 	existing T,
 	newVal *T,
-	updatedColumns *mysql.ColumnList,
+	updatedColumns *ColumnList,
-	targetColumn mysql.Column,
+	targetColumn Column,
 ) T {
 	if newVal == nil {
 		return existing

doc.go

@@ -13,7 +13,7 @@
 //
 // # Jet column utilities
 //
-// Dialect-neutral union types ([Column], [ColumnList]) and helpers for column
+// Dialect-neutral type aliases ([Column], [ColumnList]) and helpers for column
 // lists ([NormalCols]) and expression building ([ExprValues]).
 //
 // Partial-update helpers ([ApplyPtr], [ApplyVal]) track changed fields for

jet_columns.go

@@ -4,14 +4,14 @@ import "github.com/go-jet/jet/v2/mysql"
 
 // NormalCols processes a list of columns and strips out any that implement any of
 // ColumnTimestamp, ColumnTime, or ColumnDate.
-func NormalCols[CL ColumnList](cols ...Column) CL {
+func NormalCols(cols ...Column) ColumnList {
-	res := make(CL, 0)
+	res := make(ColumnList, 0)
 
 	for _, col := range cols {
 		switch col.(type) {
-		case mysql.ColumnTimestamp, // = postgres.ColumnTimestamp
+		case mysql.ColumnTimestamp,
-			mysql.ColumnTime, // = postgres.ColumnTime
+			mysql.ColumnTime,
-			mysql.ColumnDate: // = postgres.ColumnDate
+			mysql.ColumnDate:
 		default:
 			res = append(res, col)
 		}

jet_expr.go

@@ -6,19 +6,19 @@ import (
 	"github.com/go-jet/jet/v2/mysql"
 )
 
-// ExprValues converts a list of values to a list of mysql.Expression values using
+// ExprValues converts a list of values to a list of Expression values using
 // function f to transform the values (mysql.String for strings, mysql.Uint64, etc).
-func ExprValues[T any](values []T, f func(T) mysql.Expression) []mysql.Expression {
+func ExprValues[T any](values []T, f func(T) Expression) []Expression {
-	expressions := make([]mysql.Expression, len(values))
+	expressions := make([]Expression, len(values))
 	for i, v := range values {
 		expressions[i] = f(v)
 	}
 	return expressions
 }
 
-// ExprStringers converts a list of fmt.Stringers to a list of mysql.Expression values.
+// ExprStringers converts a list of fmt.Stringers to a list of Expression values.
-func ExprStringers(values []fmt.Stringer) []mysql.Expression {
+func ExprStringers(values []fmt.Stringer) []Expression {
-	expressions := make([]mysql.Expression, len(values))
+	expressions := make([]Expression, len(values))
 	for i, v := range values {
 		expressions[i] = mysql.String(v.String())
 	}

jet_types.go

@@ -1,24 +1,15 @@
 package dbx
 
-import (
+import "github.com/go-jet/jet/v2/mysql"
-	"github.com/go-jet/jet/v2/mysql"
-	"github.com/go-jet/jet/v2/postgres"
-)
 
-// Column is a union type for mysql.Column and postgres.Column
+// Column is a dialect-neutral alias for Jet column expressions.
-type Column interface {
+type Column = mysql.Column
-	mysql.Column
-	postgres.Column
-}
 
-// ColumnList is a union type for mysql.ColumnList and postgres.ColumnList
+// ColumnList is a dialect-neutral alias for Jet column lists.
-type ColumnList interface {
+type ColumnList = mysql.ColumnList
-	mysql.ColumnList
-	postgres.ColumnList
-}
 
-// BoolExpression is a union type for mysql.BoolExpression and postgres.BoolExpression
+// Expression is a dialect-neutral alias for Jet SQL expressions.
-type BoolExpression interface {
+type Expression = mysql.Expression
-	mysql.BoolExpression
+
-	postgres.BoolExpression
+// BoolExpression is a dialect-neutral alias for Jet boolean expressions.
-}
+type BoolExpression = mysql.BoolExpression