TableViewtemporarySourceTableView=createTemporarySessionView(command.getQueryAlias(),querySQLOutput[0],columnTemplateList,false/*no recursion*/,false/* do not add to session*/);
throwDbException.get(ErrorCode.DUPLICATE_KEY_1,"Merge using ON column expression, duplicate _ROWID_ target record already updated, deleted or inserted:_ROWID_="
throwDbException.get(ErrorCode.GENERAL_ERROR_1,"Expected to find key after row inserted, but none found. Insert does not match ON condition.:"+targetTable.getSQL()+":source row="+Arrays.asList(sourceRow.getValueList()));
}
}
returnlocalCount;
}
// Use the regular merge syntax as our plan SQL
@Override
publicStringgetPlanSQL(){
StatementBuilderbuff=newStatementBuilder("MERGE INTO ");
privatestaticfinalStringGATHER_ORDERED_RESULTS_SQL="SELECT ID, NAME FROM PARENT ORDER BY ID ASC";
privatestaticinttriggerTestingUpdateCount=0;
/**
* Run just this test.
*
* @param a ignored
*/
publicstaticvoidmain(String...a)throwsException{
TestBase.createCaller().init().test();
}
privateStringtriggerName;
@Override
publicvoidtest()throwsException{
// Simple ID,NAME inserts, target table with PK initially empty
testMergeUsing(
"CREATE TABLE PARENT(ID INT, NAME VARCHAR, PRIMARY KEY(ID) );",
"MERGE INTO PARENT AS P USING (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) ) AS S ON (P.ID = S.ID AND 1=1 AND S.ID = P.ID) WHEN MATCHED THEN UPDATE SET P.NAME = S.NAME WHERE 2 = 2 WHEN NOT MATCHED THEN INSERT (ID, NAME) VALUES (S.ID, S.NAME)",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2)",
2
);
// Simple NAME updates, target table missing PK
testMergeUsing(
"CREATE TABLE PARENT AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) );",
"MERGE INTO PARENT AS P USING (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) ) AS S ON (P.ID = S.ID AND 1=1 AND S.ID = P.ID) WHEN MATCHED THEN UPDATE SET P.NAME = S.NAME||S.ID WHERE 1 = 1 WHEN NOT MATCHED THEN INSERT (ID, NAME) VALUES (S.ID, S.NAME)",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X||X AS NAME FROM SYSTEM_RANGE(1,2)",
2
);
// No NAME updates, WHERE clause is always false, insert clause missing
testMergeUsing(
"CREATE TABLE PARENT AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) );",
"MERGE INTO PARENT AS P USING (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) ) AS S ON (P.ID = S.ID) WHEN MATCHED THEN UPDATE SET P.NAME = S.NAME||S.ID WHERE 1 = 2",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2)",
0
);
// No NAME updates, no WHERE clause, insert clause missing
testMergeUsing(
"CREATE TABLE PARENT AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) );",
"MERGE INTO PARENT AS P USING (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) ) AS S ON (P.ID = S.ID) WHEN MATCHED THEN UPDATE SET P.NAME = S.NAME||S.ID",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X||X AS NAME FROM SYSTEM_RANGE(1,2)",
2
);
// Two delete updates done, no WHERE clause, insert clause missing
testMergeUsing(
"CREATE TABLE PARENT AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) );",
"MERGE INTO PARENT AS P USING (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) ) AS S ON (P.ID = S.ID) WHEN MATCHED THEN DELETE",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) WHERE 1=0",
2
);
// One insert, one update one delete happens, target table missing PK
testMergeUsing(
"CREATE TABLE PARENT AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) );",
"MERGE INTO PARENT AS P USING (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) ) AS S ON (P.ID = S.ID) WHEN MATCHED THEN UPDATE SET P.NAME = S.NAME||S.ID WHERE P.ID = 2 DELETE WHERE P.ID = 1 WHEN NOT MATCHED THEN INSERT (ID, NAME) VALUES (S.ID, S.NAME)",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X||X AS NAME FROM SYSTEM_RANGE(2,2) UNION ALL SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(3,3)",
3
);
// No updates happen: No insert defined, no update or delete happens due to ON condition failing always, target table missing PK
testMergeUsing(
"CREATE TABLE PARENT AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) );",
"MERGE INTO PARENT AS P USING (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) ) AS S ON (P.ID = S.ID AND 1=0) WHEN MATCHED THEN UPDATE SET P.NAME = S.NAME||S.ID WHERE P.ID = 2 DELETE WHERE P.ID = 1",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2)",
0
);
// One insert, one update one delete happens, target table missing PK
testMergeUsing(
"CREATE TABLE PARENT AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) );"+
"CREATE TABLE SOURCE AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) );",
"MERGE INTO PARENT AS P USING SOURCE AS S ON (P.ID = S.ID) WHEN MATCHED THEN UPDATE SET P.NAME = S.NAME||S.ID WHERE P.ID = 2 DELETE WHERE P.ID = 1 WHEN NOT MATCHED THEN INSERT (ID, NAME) VALUES (S.ID, S.NAME)",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X||X AS NAME FROM SYSTEM_RANGE(2,2) UNION ALL SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(3,3)",
3
);
// One insert, one update one delete happens, target table missing PK, no source alias
testMergeUsing(
"CREATE TABLE PARENT AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) );"+
"CREATE TABLE SOURCE AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) );",
"MERGE INTO PARENT AS P USING SOURCE ON (P.ID = SOURCE.ID) WHEN MATCHED THEN UPDATE SET P.NAME = SOURCE.NAME||SOURCE.ID WHERE P.ID = 2 DELETE WHERE P.ID = 1 WHEN NOT MATCHED THEN INSERT (ID, NAME) VALUES (SOURCE.ID, SOURCE.NAME)",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X||X AS NAME FROM SYSTEM_RANGE(2,2) UNION ALL SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(3,3)",
3
);
// One insert, one update one delete happens, target table missing PK, no source or target alias
testMergeUsing(
"CREATE TABLE PARENT AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) );"+
"CREATE TABLE SOURCE AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) );",
"MERGE INTO PARENT USING SOURCE ON (PARENT.ID = SOURCE.ID) WHEN MATCHED THEN UPDATE SET PARENT.NAME = SOURCE.NAME||SOURCE.ID WHERE PARENT.ID = 2 DELETE WHERE PARENT.ID = 1 WHEN NOT MATCHED THEN INSERT (ID, NAME) VALUES (SOURCE.ID, SOURCE.NAME)",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X||X AS NAME FROM SYSTEM_RANGE(2,2) UNION ALL SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(3,3)",
3
);
// Only insert clause, no update or delete clauses
testMergeUsing(
"CREATE TABLE PARENT AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,1) );"+
"DELETE FROM PARENT;",
"MERGE INTO PARENT AS P USING (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) ) AS S ON (P.ID = S.ID) WHEN NOT MATCHED THEN INSERT (ID, NAME) VALUES (S.ID, S.NAME)",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3)",
3
);
// no insert, no update, no delete clauses - essentially a no-op
testMergeUsingException(
"CREATE TABLE PARENT AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,1) );"+
"DELETE FROM PARENT;",
"MERGE INTO PARENT AS P USING (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) ) AS S ON (P.ID = S.ID)",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) WHERE X<0",
0,
"At least UPDATE, DELETE or INSERT embedded statement must be supplied."
);
// Two updates to same row - update and delete together - emptying the parent table
testMergeUsing(
"CREATE TABLE PARENT AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,1) )",
"MERGE INTO PARENT AS P USING (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) ) AS S ON (P.ID = S.ID) WHEN MATCHED THEN UPDATE SET P.NAME = P.NAME||S.ID WHERE P.ID = 1 DELETE WHERE P.ID = 1 AND P.NAME = 'Marcy11'",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,1) WHERE X<0",
2
);
// Duplicate source keys but different ROWID update - so no error
// SQL standard says duplicate or repeated updates of same row in same statement should cause errors - but because first row is updated, deleted (on source row 1) then inserted (on source row 2)
// it's considered different - with respect to to ROWID - so no error
// One insert, one update one delete happens (on same row) , target table missing PK, no source or target alias
testMergeUsing(
"CREATE TABLE PARENT AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,1) );"+
"CREATE TABLE SOURCE AS (SELECT 1 AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2) );",
"MERGE INTO PARENT USING SOURCE ON (PARENT.ID = SOURCE.ID) WHEN MATCHED THEN UPDATE SET PARENT.NAME = SOURCE.NAME||SOURCE.ID WHERE PARENT.ID = 2 DELETE WHERE PARENT.ID = 1 WHEN NOT MATCHED THEN INSERT (ID, NAME) VALUES (SOURCE.ID, SOURCE.NAME)",
GATHER_ORDERED_RESULTS_SQL,
"SELECT 1 AS ID, 'Marcy'||X||X UNION ALL SELECT 1 AS ID, 'Marcy2'",
2
);
// Multiple update on same row: SQL standard says duplicate or repeated updates in same statement should cause errors -but because first row is updated, delete then insert it's considered different
// One insert, one update one delete happens (on same row, which is okay), then another update (which is illegal)target table missing PK, no source or target alias
testMergeUsingException(
"CREATE TABLE PARENT AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,1) );"+
"CREATE TABLE SOURCE AS (SELECT 1 AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) );",
"MERGE INTO PARENT USING SOURCE ON (PARENT.ID = SOURCE.ID) WHEN MATCHED THEN UPDATE SET PARENT.NAME = SOURCE.NAME||SOURCE.ID WHERE PARENT.ID = 2 DELETE WHERE PARENT.ID = 1 WHEN NOT MATCHED THEN INSERT (ID, NAME) VALUES (SOURCE.ID, SOURCE.NAME)",
GATHER_ORDERED_RESULTS_SQL,
"SELECT 1 AS ID, 'Marcy'||X||X UNION ALL SELECT 1 AS ID, 'Marcy2'",
3,
"Unique index or primary key violation: \"Merge using ON column expression, duplicate _ROWID_ target record already updated, deleted or inserted:_ROWID_=2:in:PUBLIC.PARENT:conflicting source row number:2"
);
// Duplicate key updated 3 rows at once, only 1 expected
testMergeUsingException(
"CREATE TABLE PARENT AS (SELECT 1 AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) );"+
"CREATE TABLE SOURCE AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) );",
"MERGE INTO PARENT USING SOURCE ON (PARENT.ID = SOURCE.ID) WHEN MATCHED THEN UPDATE SET PARENT.NAME = SOURCE.NAME||SOURCE.ID WHERE PARENT.ID = 2 DELETE WHERE PARENT.ID = 1 WHEN NOT MATCHED THEN INSERT (ID, NAME) VALUES (SOURCE.ID, SOURCE.NAME)",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X||X AS NAME FROM SYSTEM_RANGE(2,2) UNION ALL SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(3,3)",
3,
"Duplicate key updated 3 rows at once, only 1 expected"
);
// Missing target columns in ON expression
testMergeUsingException(
"CREATE TABLE PARENT AS (SELECT 1 AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) );"+
"CREATE TABLE SOURCE AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) );",
"MERGE INTO PARENT USING SOURCE ON (1 = SOURCE.ID) WHEN MATCHED THEN UPDATE SET PARENT.NAME = SOURCE.NAME||SOURCE.ID WHERE PARENT.ID = 2 DELETE WHERE PARENT.ID = 1 WHEN NOT MATCHED THEN INSERT (ID, NAME) VALUES (SOURCE.ID, SOURCE.NAME)",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X||X AS NAME FROM SYSTEM_RANGE(2,2) UNION ALL SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(3,3)",
3,
"No references to target columns found in ON clause"
);
// Missing source columns in ON expression
testMergeUsingException(
"CREATE TABLE PARENT AS (SELECT 1 AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) );"+
"CREATE TABLE SOURCE AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) );",
"MERGE INTO PARENT USING SOURCE ON (PARENT.ID = 1) WHEN MATCHED THEN UPDATE SET PARENT.NAME = SOURCE.NAME||SOURCE.ID WHERE PARENT.ID = 2 DELETE WHERE PARENT.ID = 1 WHEN NOT MATCHED THEN INSERT (ID, NAME) VALUES (SOURCE.ID, SOURCE.NAME)",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X||X AS NAME FROM SYSTEM_RANGE(2,2) UNION ALL SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(3,3)",
3,
"No references to source columns found in ON clause"
);
// Insert does not insert correct values with respect to ON condition (inserts ID value above 100, instead)
testMergeUsingException(
"CREATE TABLE PARENT AS (SELECT 1 AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(4,4) );"+
"CREATE TABLE SOURCE AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,3) );",
"MERGE INTO PARENT USING SOURCE ON (PARENT.ID = SOURCE.ID) WHEN MATCHED THEN UPDATE SET PARENT.NAME = SOURCE.NAME||SOURCE.ID WHERE PARENT.ID = 2 DELETE WHERE PARENT.ID = 1 WHEN NOT MATCHED THEN INSERT (ID, NAME) VALUES (SOURCE.ID+100, SOURCE.NAME)",
GATHER_ORDERED_RESULTS_SQL,
"SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(4,4)",
1,
"Expected to find key after row inserted, but none found. Insert does not match ON condition."
);
// One insert, one update one delete happens, target table missing PK, triggers update all NAME fields
triggerTestingUpdateCount=0;
testMergeUsing(
"CREATE TABLE PARENT AS (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,2));"
+getCreateTriggerSQL(),
"MERGE INTO PARENT AS P USING (SELECT X AS ID, 'Marcy'||X AS NAME FROM SYSTEM_RANGE(1,4) ) AS S ON (P.ID = S.ID) WHEN MATCHED THEN UPDATE SET P.NAME = S.NAME||S.ID WHERE P.ID = 2 DELETE WHERE P.ID = 1 WHEN NOT MATCHED THEN INSERT (ID, NAME) VALUES (S.ID, S.NAME)",
GATHER_ORDERED_RESULTS_SQL,
"SELECT 2 AS ID, 'Marcy22-updated2' AS NAME UNION ALL SELECT X AS ID, 'Marcy'||X||'-inserted'||X AS NAME FROM SYSTEM_RANGE(3,4)",
4
);
}
/**
* Run a test case of the merge using syntax
* @param setupSQL - one or more SQL statements to setup the case
* @param statementUnderTest - the merge statement being tested
* @param gatherResultsSQL - a select which gathers the results of the merge from the target table
* @param expectedResultsSQL - a select which returns the expected results in the target table
* @param expectedRowUpdateCount - how many updates should be expected from the merge using
