fix(dolphin): Support more UNIONs for MySQL (sqlc-dev#2843)

Author: kyleconroy

go.mod

@@ -50,7 +50,7 @@ require (
 	github.com/jackc/pgtype v1.14.0
 	github.com/pingcap/errors v0.11.5-0.20210425183316-da1aaba5fb63 // indirect
 	github.com/pingcap/log v1.1.0 // indirect
-	github.com/pingcap/tidb/parser v0.0.0-20230815160630-b69fa21942d1
+	github.com/pingcap/tidb/parser v0.0.0-20231010133155-38cb4f3312be
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	github.com/rogpeppe/go-internal v1.10.0 // indirect
 	github.com/stoewer/go-strcase v1.2.0 // indirect

go.sum

@@ -142,6 +142,8 @@ github.com/pingcap/log v1.1.0 h1:ELiPxACz7vdo1qAvvaWJg1NrYFoY6gqAh/+Uo6aXdD8=
 github.com/pingcap/log v1.1.0/go.mod h1:DWQW5jICDR7UJh4HtxXSM20Churx4CQL0fwL/SoOSA4=
 github.com/pingcap/tidb/parser v0.0.0-20230815160630-b69fa21942d1 h1:FvX5fDJ32eblK9f6KJIOVujjtu3FDEfcRGHsEDfJ4kI=
 github.com/pingcap/tidb/parser v0.0.0-20230815160630-b69fa21942d1/go.mod h1:pWA6mNa/o7UTDKrg+4H75NdpRgpWRTox/cqQjaQ4ZBU=
+github.com/pingcap/tidb/parser v0.0.0-20231010133155-38cb4f3312be h1:4HUBkIZs+4j+tbXGm5/B0yjB66OTz218HDKA6VrhO7U=
+github.com/pingcap/tidb/parser v0.0.0-20231010133155-38cb4f3312be/go.mod h1:cwq4bKUlftpWuznB+rqNwbN0xy6/i5SL/nYvEKeJn4s=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=

internal/endtoend/testdata/select_union_subquery/issue.md

@@ -0,0 +1 @@
+https://github.com/sqlc-dev/sqlc/issues/2260

internal/endtoend/testdata/select_union_subquery/mysql/go/db.go

@@ -0,0 +1,6 @@
+-- name: TestSubqueryUnion :many
+SELECT tmp.* FROM (
+  SELECT * FROM authors
+  UNION
+  SELECT * FROM authors
+) tmp LIMIT 5;

internal/endtoend/testdata/select_union_subquery/mysql/go/models.go

@@ -0,0 +1,5 @@
+CREATE TABLE authors (
+  id   int PRIMARY KEY,
+  name text      NOT NULL,
+  bio  text
+);

internal/endtoend/testdata/select_union_subquery/mysql/go/query.sql.go

@@ -0,0 +1,9 @@
+version: "2"
+sql:
+  - engine: "mysql"
+    schema: "schema.sql"
+    queries: "query.sql"
+    gen:
+      go:
+        package: "querytest"
+        out: "go"