Add parsing for ALTER TABLE tbl_name {DISABLE | ENABLE} KEYS

src/main/java/net/sf/jsqlparser/statement/alter/AlterExpression.java

@@ -509,6 +509,10 @@ public String toString() {
             b.append("DISCARD TABLESPACE");
         } else if (operation == AlterOperation.IMPORT_TABLESPACE) {
             b.append("IMPORT TABLESPACE");
+        } else if (operation == AlterOperation.DISABLE_KEYS) {
+            b.append("DISABLE KEYS");
+        } else if (operation == AlterOperation.ENABLE_KEYS) {
+            b.append("ENABLE KEYS");
         } else if (operation == AlterOperation.ENGINE) {
             b.append("ENGINE ");
             if (useEqual) {

src/main/java/net/sf/jsqlparser/statement/alter/AlterOperation.java

@@ -10,7 +10,7 @@
 package net.sf.jsqlparser.statement.alter;
 
 public enum AlterOperation {
-    ADD, ALTER, DROP, DROP_PRIMARY_KEY, DROP_UNIQUE, DROP_FOREIGN_KEY, MODIFY, CHANGE, CONVERT, COLLATE, ALGORITHM, RENAME, RENAME_TABLE, RENAME_INDEX, RENAME_KEY, RENAME_CONSTRAINT, COMMENT, COMMENT_WITH_EQUAL_SIGN, UNSPECIFIC, ADD_PARTITION, DROP_PARTITION, TRUNCATE_PARTITION, SET_TABLE_OPTION, ENGINE, FORCE, LOCK, DISCARD_TABLESPACE, IMPORT_TABLESPACE;
+    ADD, ALTER, DROP, DROP_PRIMARY_KEY, DROP_UNIQUE, DROP_FOREIGN_KEY, MODIFY, CHANGE, CONVERT, COLLATE, ALGORITHM, RENAME, RENAME_TABLE, RENAME_INDEX, RENAME_KEY, RENAME_CONSTRAINT, COMMENT, COMMENT_WITH_EQUAL_SIGN, UNSPECIFIC, ADD_PARTITION, DROP_PARTITION, TRUNCATE_PARTITION, SET_TABLE_OPTION, ENGINE, FORCE, LOCK, DISCARD_TABLESPACE, IMPORT_TABLESPACE, DISABLE_KEYS, ENABLE_KEYS;
 
     public static AlterOperation from(String operation) {
         return Enum.valueOf(AlterOperation.class, operation.toUpperCase());

src/main/jjtree/net/sf/jsqlparser/parser/JSqlParserCC.jjt

@@ -8110,6 +8110,20 @@ AlterExpression AlterExpression():
           }
       )
       |
+      (
+          (tk = <K_DISABLE>)
+          (tk2 = <K_KEYS>) {
+              alterExp.setOperation(AlterOperation.DISABLE_KEYS);
+          }
+      )
+      |
+      (
+          (tk = <K_ENABLE>)
+          (tk2 = <K_KEYS>) {
+              alterExp.setOperation(AlterOperation.ENABLE_KEYS);
+          }
+      )
+      |
       (<K_AUTO_INCREMENT> {alterExp.setOperation(AlterOperation.SET_TABLE_OPTION);}
               ["=" { alterExp.setUseEqual(true);} ]
               tk=<S_LONG> {

src/test/java/net/sf/jsqlparser/statement/alter/AlterTest.java

@@ -1479,4 +1479,25 @@ public void testImportTablespace() throws JSQLParserException {
                 alter.getAlterExpressions().get(0).getOperation().toString());
         assertSqlCanBeParsedAndDeparsed(sql);
     }
+
+    @Test
+    public void testAlterTableKeys() throws JSQLParserException {
+        // Test for DISABLE KEYS
+        String sqlDisable = "ALTER TABLE tbl_name DISABLE KEYS";
+        Statement stmtDisable = CCJSqlParserUtil.parse(sqlDisable);
+        assertTrue(stmtDisable instanceof Alter);
+        Alter alterDisable = (Alter) stmtDisable;
+        assertEquals("tbl_name", alterDisable.getTable().getFullyQualifiedName());
+        AlterExpression alterExpDisable = alterDisable.getAlterExpressions().get(0);
+        assertEquals(AlterOperation.DISABLE_KEYS, alterExpDisable.getOperation());
+
+        // Test for ENABLE KEYS
+        String sqlEnable = "ALTER TABLE tbl_name ENABLE KEYS";
+        Statement stmtEnable = CCJSqlParserUtil.parse(sqlEnable);
+        assertTrue(stmtEnable instanceof Alter);
+        Alter alterEnable = (Alter) stmtEnable;
+        assertEquals("tbl_name", alterEnable.getTable().getFullyQualifiedName());
+        AlterExpression alterExpEnable = alterEnable.getAlterExpressions().get(0);
+        assertEquals(AlterOperation.ENABLE_KEYS, alterExpEnable.getOperation());
+    }
 }