feat: improve MySQL CONCAT function argument type handling

internal/endtoend/testdata/mysql_concat_type/query.sql

@@ -0,0 +1,10 @@
+-- name: GetTickets :many
+SELECT
+    id,
+    title,
+    ticket_status,
+    created_at
+FROM ticket
+WHERE (sqlc.narg(start_time) IS NULL OR created_at >= sqlc.narg(start_time))
+  AND (sqlc.narg(title_prefix) IS NULL OR title LIKE CONCAT(sqlc.narg(title_prefix), '%'))
+ORDER BY id ASC;

internal/endtoend/testdata/mysql_concat_type/schema.sql

@@ -0,0 +1,7 @@
+CREATE TABLE ticket
+(
+    id                  BIGINT AUTO_INCREMENT PRIMARY KEY,
+    ticket_status       TINYINT      NOT NULL,
+    title               VARCHAR(255) NOT NULL,
+    created_at          DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP
+);

internal/endtoend/testdata/mysql_concat_type/sqlc.json

@@ -0,0 +1,16 @@
+{
+    "version": "2",
+    "sql": [
+        {
+            "engine": "mysql",
+            "queries": "query.sql",
+            "schema": "schema.sql",
+            "gen": {
+                "go": {
+                    "package": "mysql_concat_type",
+                    "out": "mysql"
+                }
+            }
+        }
+    ]
+}

internal/engine/dolphin/stdlib.go

@@ -415,10 +415,10 @@ func defaultSchema(name string) *catalog.Schema {
 			Name: "CONCAT",
 			Args: []*catalog.Argument{
 				{
-					Type: &ast.TypeName{Name: "any"},
+					Type: &ast.TypeName{Name: "text"},
 				},
 				{
-					Type: &ast.TypeName{Name: "any"},
+					Type: &ast.TypeName{Name: "text"},
 					Mode: ast.FuncParamVariadic,
 				},
 			},