package com.alipay.zdal.test.ut.sqlparser.mysql;
import java.util.List;
import org.junit.Test;
import junit.framework.Assert;
import com.alipay.zdal.parser.sql.ast.SQLStatement;
import com.alipay.zdal.parser.sql.dialect.mysql.parser.MySqlStatementParser;
import com.alipay.zdal.parser.sql.dialect.mysql.visitor.MySqlOutputVisitor;
import com.alipay.zdal.parser.sql.parser.SQLStatementParser;
public class AssignmentOperatorsTest {
@Test
public void test_0() throws Exception {
String sql = "SELECT @var1, @var2;";
SQLStatementParser parser = new MySqlStatementParser(sql);
List<SQLStatement> stmtList = parser.parseStatementList();
String text = output(stmtList);
Assert.assertEquals("SELECT @var1, @var2;", text);
}
@Test
public void test_1() throws Exception {
String sql = "SELECT @var1 := 1, @var2;";
SQLStatementParser parser = new MySqlStatementParser(sql);
List<SQLStatement> stmtList = parser.parseStatementList();
String text = output(stmtList);
Assert.assertEquals("SELECT @var1 := 1, @var2;", text);
}
@Test
public void test_2() throws Exception {
String sql = "SELECT @var1, @var2 := @var1;";
SQLStatementParser parser = new MySqlStatementParser(sql);
List<SQLStatement> stmtList = parser.parseStatementList();
String text = output(stmtList);
Assert.assertEquals("SELECT @var1, @var2 := @var1;", text);
}
@Test
public void test_3() throws Exception {
String sql = "SELECT @var1:=COUNT(*) FROM t1;";
SQLStatementParser parser = new MySqlStatementParser(sql);
List<SQLStatement> stmtList = parser.parseStatementList();
String text = output(stmtList);
Assert.assertEquals("SELECT @var1 := COUNT(*)\nFROM t1;", text);
}
@Test
public void test_4() throws Exception {
String sql = "UPDATE t1 SET c1 = 2 WHERE c1 = @var1:= 1;";
SQLStatementParser parser = new MySqlStatementParser(sql);
List<SQLStatement> stmtList = parser.parseStatementList();
String text = output(stmtList);
Assert.assertEquals("UPDATE t1\nSET c1 = 2\nWHERE c1 = (@var1 := 1);", text);
}
private String output(List<SQLStatement> stmtList) {
StringBuilder out = new StringBuilder();
for (SQLStatement stmt : stmtList) {
stmt.accept(new MySqlOutputVisitor(out));
out.append(";");
}
return out.toString();
}
}