Assorted fixes

build.gradle

@@ -12,7 +12,7 @@ plugins {
 }
 
 group = 'com.github.jsqlparser'
-version = '4.5-SNAPSHOT'
+version = '4.6-SNAPSHOT'
 description = 'JSQLParser library'
 java.sourceCompatibility = JavaVersion.VERSION_1_8
 
@@ -43,6 +43,7 @@ dependencies {
 
     // https://mvnrepository.com/artifact/org.mockito/mockito-junit-jupiter
     testImplementation 'org.mockito:mockito-junit-jupiter:4.+'
+    testImplementation 'org.junit.jupiter:junit-jupiter-params:+'
 
     // enforce latest version of JavaCC
     javacc 'net.java.dev.javacc:javacc:7.0.12'

src/main/java/net/sf/jsqlparser/schema/Table.java

@@ -103,7 +103,25 @@ public void setSchemaName(String schemaName) {
     }
 
     public String getName() {
-        return getIndex(NAME_IDX);
+        String name = getIndex(NAME_IDX);
+        if (name!=null && name.contains("@")) {
+            int pos = name.lastIndexOf('@');
+            if (pos>0) {
+                name = name.substring(0, pos );
+            }
+        }
+        return name;
+    }
+
+    public String getDBLinkName() {
+        String name = getIndex(NAME_IDX);
+        if (name!=null && name.contains("@")) {
+            int pos = name.lastIndexOf('@');
+            if (pos>0 && name.length()>1) {
+                name = name.substring(pos+1);
+            }
+        }
+        return name;
     }
 
     public Table withName(String name) {
@@ -241,4 +259,8 @@ public Table withSqlServerHints(SQLServerHints sqlServerHints) {
         this.setSqlServerHints(sqlServerHints);
         return this;
     }
+
+    public List<String> getNameParts() {
+        return partItems;
+    }
 }

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

@@ -3735,7 +3735,8 @@ Expression ComparisonItem() :
     LOOKAHEAD(3) retval=AnyComparisonExpression()
     | LOOKAHEAD(ValueListExpression()) retval=ValueListExpression()
     | LOOKAHEAD(3) retval=SimpleExpression()
-    | retval=RowConstructor()
+    | LOOKAHEAD(3) retval=RowConstructor()
+    | retval=PrimaryExpression()
   )
 
    {

src/test/java/net/sf/jsqlparser/statement/select/SelectTest.java

@@ -46,6 +46,7 @@
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
@@ -5243,4 +5244,25 @@ public void testNamedWindowDefinitionIssue1581_2() throws JSQLParserException {
     public void testTimestamptzDateTimeLiteral() throws JSQLParserException {
         assertSqlCanBeParsedAndDeparsed("SELECT * FROM table WHERE x >= TIMESTAMPTZ '2021-07-05 00:00:00+00'");
     }
+
+
+    @Test
+    public void testFunctionComplexExpressionParametersIssue1644() throws JSQLParserException {
+        assertSqlCanBeParsedAndDeparsed("SELECT test(1=1, 'a', 'b')", true);
+        assertSqlCanBeParsedAndDeparsed("SELECT if(instr('avc','a')=0, 'avc', 'aaa')", true);
+    }
+
+    @Test
+    public void testOracleDBLink() throws JSQLParserException {
+        String sqlStr = "SELECT * from tablename@dblink";
+        assertSqlCanBeParsedAndDeparsed(sqlStr, true);
+
+        Select select = (Select) CCJSqlParserUtil.parse(sqlStr);
+        PlainSelect plainSelect = (PlainSelect) select.getSelectBody();
+        Table table = (Table) plainSelect.getFromItem();
+
+        assertNotEquals("tablename@dblink", table.getName());
+        assertEquals("tablename", table.getName());
+        assertEquals("dblink", table.getDBLinkName());
+    }
 }