From 5a558932f61473ffe34998fb4671b5ec0dcccd6b Mon Sep 17 00:00:00 2001
From: hellozrh <455741807@qq.com>
Date: Thu, 20 Jul 2023 20:13:49 +0800
Subject: [PATCH] informix-sql: add support of set auto free.

---
 sql/informix-sql/InformixSQLLexer.g4      | 3 +++
 sql/informix-sql/InformixSQLParser.g4     | 9 +++++++++
 sql/informix-sql/examples/setautoFree.sql | 6 ++++++
 3 files changed, 18 insertions(+)
 create mode 100644 sql/informix-sql/examples/setautoFree.sql

diff --git a/sql/informix-sql/InformixSQLLexer.g4 b/sql/informix-sql/InformixSQLLexer.g4
index dfe4252731..6f53d150b7 100644
--- a/sql/informix-sql/InformixSQLLexer.g4
+++ b/sql/informix-sql/InformixSQLLexer.g4
@@ -66,6 +66,7 @@ AND:               'AND';
 AS:                'AS';
 ASC:               'ASC';
 ATTACH:            'ATTACH';
+AUTOFREE:          'AUTOFREE';
 AUTOINCREMENT:     'AUTOINCREMENT';
 BEFORE:            'BEFORE';
 BEGIN:             'BEGIN';
@@ -95,10 +96,12 @@ DEFERRED:          'DEFERRED';
 DELETE:            'DELETE';
 DESC:              'DESC';
 DETACH:            'DETACH';
+DISABLED:          'DISABLED';
 DISTINCT:          'DISTINCT';
 DROP:              'DROP';
 EACH:              'EACH';
 ELSE:              'ELSE';
+ENABLED:           'ENABLED';
 END:               'END';
 ESCAPE:            'ESCAPE';
 EXCEPT:            'EXCEPT';
diff --git a/sql/informix-sql/InformixSQLParser.g4 b/sql/informix-sql/InformixSQLParser.g4
index 9b541d3427..ec7aa717fd 100644
--- a/sql/informix-sql/InformixSQLParser.g4
+++ b/sql/informix-sql/InformixSQLParser.g4
@@ -64,6 +64,7 @@ unitStatement
     | renameUser
     | rollbackWork
     | savepointStmt
+    | setAutofree
     ) SCOL
     ;
 
@@ -221,6 +222,11 @@ savepointStmt
     : SAVEPOINT savepoint=identifier UNIQUE?
     ;
 
+//https://www.ibm.com/docs/en/informix-servers/14.10?topic=statements-set-autofree-statement
+setAutofree
+    : SET AUTOFREE (ENABLED | DISABLED)? (FOR (cursorId=identifier | cursorIdVar=anyName))?
+    ;
+
 anyName
     : IDENTIFIER
     | keyword
@@ -246,6 +252,7 @@ keyword
     | AS
     | ASC
     | ATTACH
+    | AUTOFREE
     | AUTOINCREMENT
     | BEFORE
     | BEGIN
@@ -275,10 +282,12 @@ keyword
     | DELETE
     | DESC
     | DETACH
+    | DISABLED
     | DISTINCT
     | DROP
     | EACH
     | ELSE
+    | ENABLED
     | END
     | ESCAPE
     | EXCEPT
diff --git a/sql/informix-sql/examples/setautoFree.sql b/sql/informix-sql/examples/setautoFree.sql
new file mode 100644
index 0000000000..e09f137e90
--- /dev/null
+++ b/sql/informix-sql/examples/setautoFree.sql
@@ -0,0 +1,6 @@
+SET AUTOFREE ;
+SET AUTOFREE ENABLED;
+SET AUTOFREE DISABLED;
+SET AUTOFREE DISABLED FOR idd;
+
+