feat: update alter and drop statements (#94)

* feat: add UNIQUE keyword

* feat: support ifExist, addConstraint, dropConstraint and addUnique of alter table statement

* feat: support ifExist, addConstraint, dropConstraint and addUnique of alter table statement

* tests: add tests of alter statements

* docs: add comments for sql syntax

* build: optimize promote of build/antlr4

* ci: add max_old_space_size

* ci: add max_old_space_size

* ci: update tests script

test/parser/flinksql/syntax/fixtures/alterDatabase.sql

@@ -1 +1,3 @@
-ALTER DATABASE tempDB SET ("key1"="value1");
+ALTER DATABASE tempDB SET ("key1"="value1");
+
+alter database db1 set ('key1' = 'value1','key2.a' = 'value2.a');

test/parser/flinksql/syntax/fixtures/alterFunction.sql

@@ -1,7 +1,15 @@
 ALTER FUNCTION tempFunction AS 'SimpleUdf';
 
-ALTER TEMPORARY FUNCTION IF EXISTS tempFunction AS 'SimpleUdf';
+alter temporary function function1 as 'org.apache.flink.function.function1';
+
+alter temporary function function1 as 'org.apache.flink.function.function1' language scala;
+
+alter temporary system function function1 as 'org.apache.flink.function.function1';
+
+alter temporary system function function1 as 'org.apache.flink.function.function1' language java;
 
 ALTER TEMPORARY SYSTEM FUNCTION IF EXISTS tempFunction AS 'SimpleUdf';
 
+ALTER TEMPORARY FUNCTION IF EXISTS tempFunction AS 'SimpleUdf';
+
 ALTER FUNCTION myudf AS 'com.example.MyUdf' LANGUAGE PYTHON;

test/parser/flinksql/syntax/fixtures/alterTable.sql

@@ -1,7 +1,65 @@
-ALTER TABLE
-    Orders RENAME TO NewOrders;
+-- Refer: https://github.com/apache/flink/blob/master/flink-table/flink-sql-parser/src/test/java/org/apache/flink/sql/parser/FlinkSqlParserImplTest.java#L2016
+-- Just for simple alter table statements, it not include alter table columns statements
+
+alter table
+    t1 rename to t2;
+
+alter table
+    if exists t1 rename to t2;
+
+alter table
+    c1.d1.t1 rename to t2;
+
+alter table
+    if exists c1.d1.t1 rename to t2;
+
+alter table
+    t1 rename a to b;
+
+alter table
+    if exists t1 rename a to b;
+
+alter table
+    if exists t1 rename a.x to a.y;
+
+alter table
+    t1
+set
+    ('key1' = 'value1');
+
+alter table
+    if exists t1
+set
+    ('key1' = 'value1');
+
+alter table
+    t1
+add
+    constraint ct1 primary key(a, b);
+
+alter table
+    t1
+add
+    constraint ct1 primary key(a, b) not enforced;
+
+alter table
+    if exists t1
+add
+    constraint ct1 primary key(a, b) not enforced;
+
+alter table
+    t1
+add
+    unique(a, b);
+
+alter table
+    if exists t1
+add
+    unique(a, b);
+
+alter table
+    t1 drop constraint ct1;
+
+alter table
+    if exists t1 drop constraint ct1;
 
-ALTER TABLE
-    sample_table
-SET
-    ('key1' = 'value2');