fix(pgsql): fix 5 bugs found during code review

1. Test_PgSQL_JSONB_Existence: replace `data ? 'email'` with
   `jsonb_exists(data, 'email')` — bare `?` gets mangled by DoFilter
   into a $N placeholder, breaking the query.

2. Test_Issue2787: fix SQL condition assertions from MySQL backtick
   quoting (`id`) to PgSQL double-quote quoting ("id").

3. Test_Issue3671: fix copy-paste table name prefix from "issue3632"
   to "issue3671".

4. issue1412.sql: add DROP TABLE IF EXISTS guards for "parcels" and
   "items" to prevent CREATE TABLE failures when tests share a process.

5. Test_Issue2643: replace unjustified Skip with actual PgSQL test —
   lpad, concat_ws, replace, CASE WHEN are all standard PgSQL functions.
   Adapted quoting from backticks to double-quotes and added `::text`
   cast for lpad (PgSQL requires text input).

ref gogf#4689

Author: lingcoder

contrib/drivers/pgsql/pgsql_z_unit_feature_pgsql_test.go

@@ -113,9 +113,10 @@ func Test_PgSQL_JSONB_Existence(t *testing.T) {
 		_, err = db.Model(table).Data(g.Map{"data": `{"name":"bob"}`}).Insert()
 		t.AssertNil(err)
 
-		// ? key existence operator
+		// jsonb_exists is the function form of the ? key-existence operator.
+		// We use it here because GoFrame's DoFilter replaces bare ? with $N placeholders.
 		result, err := db.GetValue(ctx, fmt.Sprintf(
-			`SELECT COUNT(*) FROM %s WHERE data ? 'email'`, table,
+			`SELECT COUNT(*) FROM %s WHERE jsonb_exists(data, 'email')`, table,
 		))
 		t.AssertNil(err)
 		t.Assert(result.Int(), 1)

contrib/drivers/pgsql/pgsql_z_unit_issue_test.go

@@ -126,7 +126,7 @@ func Test_Issue3671(t *testing.T) {
 	}
 	var (
 		sqlText = gtest.DataContent("issues", "issue3671.sql")
-		table   = fmt.Sprintf(`%s_%d`, TablePrefix+"issue3632", gtime.TimestampNano())
+		table   = fmt.Sprintf(`%s_%d`, TablePrefix+"issue3671", gtime.TimestampNano())
 	)
 	if _, err := db.Exec(ctx, fmt.Sprintf(sqlText, table)); err != nil {
 		gtest.Fatal(err)
@@ -1154,7 +1154,7 @@ func Test_Issue2787(t *testing.T) {
 				WhereOr("password", "abc123")).
 			Where("passport", "pp").
 			Build()
-		t.Assert(condWhere, "(`id`=?) AND (((`nickname`=?) OR (`password`=?))) AND (`passport`=?)")
+		t.Assert(condWhere, `("id"=?) AND ((("nickname"=?) OR ("password"=?))) AND ("passport"=?)`)
 
 		condWhere, _ = m.OmitEmpty().Builder().
 			Where("id", "").
@@ -1163,7 +1163,7 @@ func Test_Issue2787(t *testing.T) {
 				WhereOr("password", "abc123")).
 			Where("passport", "pp").
 			Build()
-		t.Assert(condWhere, "((`nickname`=?) OR (`password`=?)) AND (`passport`=?)")
+		t.Assert(condWhere, `(("nickname"=?) OR ("password"=?)) AND ("passport"=?)`)
 
 		condWhere, _ = m.OmitEmpty().Builder().
 			Where(m.Builder().
@@ -1172,7 +1172,7 @@ func Test_Issue2787(t *testing.T) {
 			Where("id", "").
 			Where("passport", "pp").
 			Build()
-		t.Assert(condWhere, "((`nickname`=?) OR (`password`=?)) AND (`passport`=?)")
+		t.Assert(condWhere, `(("nickname"=?) OR ("password"=?)) AND ("passport"=?)`)
 	})
 }
 
@@ -1473,7 +1473,36 @@ func Test_Issue2552_ClearTableFields(t *testing.T) {
 
 // https://github.com/gogf/gf/issues/2643
 func Test_Issue2643(t *testing.T) {
-	t.Skip("MySQL-specific SQL functions (lpad, concat_ws, CASE WHEN quoting) differ in PostgreSQL")
+	table := "issue2643"
+	array := gstr.SplitAndTrim(gtest.DataContent("issues", "issue2643.sql"), ";")
+	for _, v := range array {
+		if _, err := db.Exec(ctx, v); err != nil {
+			gtest.Error(err)
+		}
+	}
+	defer dropTable(table)
+
+	gtest.C(t, func(t *gtest.T) {
+		var (
+			expectKey1 = `SELECT s.name,replace(concat_ws(',',lpad(s.id::text, 6, '0'),s.name),',','') "code" FROM "issue2643" AS s`
+			expectKey2 = `SELECT CASE WHEN dept='物资部' THEN '物资部' ELSE '其他' END dept,sum(s.value) FROM "issue2643" AS s GROUP BY CASE WHEN dept='物资部' THEN '物资部' ELSE '其他' END`
+		)
+		sqlArray, err := gdb.CatchSQL(ctx, func(ctx context.Context) error {
+			db.Ctx(ctx).Model(table).As("s").Fields(
+				"s.name",
+				`replace(concat_ws(',',lpad(s.id::text, 6, '0'),s.name),',','') "code"`,
+			).All()
+			db.Ctx(ctx).Model(table).As("s").Fields(
+				"CASE WHEN dept='物资部' THEN '物资部' ELSE '其他' END dept",
+				"sum(s.value)",
+			).Group("CASE WHEN dept='物资部' THEN '物资部' ELSE '其他' END").All()
+			return nil
+		})
+		t.AssertNil(err)
+		sqlContent := gstr.Join(sqlArray, "\n")
+		t.Assert(gstr.Contains(sqlContent, expectKey1), true)
+		t.Assert(gstr.Contains(sqlContent, expectKey2), true)
+	})
 }
 
 // https://github.com/gogf/gf/issues/3238

contrib/drivers/pgsql/testdata/issues/issue1412.sql

@@ -1,3 +1,6 @@
+DROP TABLE IF EXISTS "parcels";
+DROP TABLE IF EXISTS "items";
+
 CREATE TABLE "items" (
     "id" int NOT NULL,
     "name" varchar(255) DEFAULT NULL,

contrib/drivers/pgsql/testdata/issues/issue2643.sql

@@ -0,0 +1,7 @@
+DROP TABLE IF EXISTS "issue2643";
+CREATE TABLE "issue2643" (
+    "id" int DEFAULT NULL,
+    "name" varchar(50) DEFAULT NULL,
+    "value" int DEFAULT NULL,
+    "dept" varchar(50) DEFAULT NULL
+);