fe/fe-core/src/test/java/org/apache/doris/analysis/ShowAlterStmtTest.java

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package org.apache.doris.analysis;

import mockit.Expectations;
import org.apache.doris.analysis.BinaryPredicate.Operator;
import org.apache.doris.catalog.Catalog;
import org.apache.doris.catalog.FakeCatalog;
import org.apache.doris.qe.ConnectContext;
import org.apache.doris.system.SystemInfoService;
import org.apache.doris.common.AnalysisException;
import org.apache.doris.common.UserException;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

public class ShowAlterStmtTest {
    private Analyzer analyzer;
    private Catalog catalog;
    private SystemInfoService systemInfo;

    private static FakeCatalog fakeCatalog;

    @Before
    public void setUp() {
        fakeCatalog = new FakeCatalog();
        catalog = AccessTestUtil.fetchAdminCatalog();

        FakeCatalog.setCatalog(catalog);

        analyzer = new Analyzer(catalog, new ConnectContext(null));
        new Expectations(analyzer) {
            {
                analyzer.getDefaultDb();
                minTimes = 0;
                result = "testDb";

                analyzer.getQualifiedUser();
                minTimes = 0;
                result = "testUser";

                analyzer.getCatalog();
                minTimes = 0;
                result = catalog;

                analyzer.getClusterName();
                minTimes = 0;
                result = "testCluster";
            }
        };
    }

    @Test
    public void testAlterStmt1() throws UserException, AnalysisException {
        ShowAlterStmt stmt = new ShowAlterStmt(ShowAlterStmt.AlterType.COLUMN,null, null,
                null,null);
        stmt.analyzeSyntax(analyzer);
        Assert.assertEquals("SHOW ALTER TABLE COLUMN FROM `testDb`", stmt.toString());
    }
    
    @Test
    public void testAlterStmt2() throws UserException, AnalysisException {
        SlotRef slotRef = new SlotRef(null, "TableName");
        StringLiteral stringLiteral = new StringLiteral("abc");
        BinaryPredicate binaryPredicate = new BinaryPredicate(Operator.EQ, slotRef, stringLiteral);
        ShowAlterStmt stmt = new ShowAlterStmt(ShowAlterStmt.AlterType.COLUMN, null, binaryPredicate, null,
                new LimitElement(1,2));
        stmt.analyzeSyntax(analyzer);
        Assert.assertEquals("SHOW ALTER TABLE COLUMN FROM `testDb` WHERE `TableName` = \'abc\' LIMIT 1, 2",
                stmt.toString());
    }
    
    @Test
    public void testAlterStmt3() throws UserException, AnalysisException {
        SlotRef slotRef = new SlotRef(null, "CreateTime");
        StringLiteral stringLiteral = new StringLiteral("2019-12-04");
        BinaryPredicate binaryPredicate = new BinaryPredicate(Operator.EQ, slotRef, stringLiteral);
        ShowAlterStmt stmt = new ShowAlterStmt(ShowAlterStmt.AlterType.COLUMN, null, binaryPredicate, null, null);
        stmt.analyzeSyntax(analyzer);
        Assert.assertEquals("SHOW ALTER TABLE COLUMN FROM `testDb` WHERE `CreateTime` = \'2019-12-04 00:00:00\'",
                stmt.toString());
    }
}