LaughingVzr opened a new pull request, #5252:
URL: https://github.com/apache/hive/pull/5252
### What changes were proposed in this pull request?
modify LazyStruct#findIndexes function and LazyStruct#parseMultiDelimit
function, change fields.length Conditional judgment：
```java
public void parseMultiDelimit(byte[] rawRow, byte[] fieldDelimit) {
- if (fields.length > 1 && delimitIndexes[i - 1] != -1) {
+ if (delimitIndexes[i - 1] != -1) {
}
private int[] findIndexes(byte[] array, byte[] target) {
- if (fields.length <= 1) {
+ if (fields.length < 1) {
...
- for (int i = 1; i < indexes.length; i++) {
+ for (int i = 1; i <= indexes.length; i++) {
...
}
return indexes;
}
```
I add an test for this fix:
```java
@Test
public void testParseMultiDelimit() throws Throwable {
try {
// single column named id
List<String> columns = new ArrayList<>();
columns.add("id");
// column type is string
List<TypeInfo> columnTypes = new ArrayList<>();
PrimitiveTypeInfo primitiveTypeInfo = new PrimitiveTypeInfo();
primitiveTypeInfo.setTypeName("string");
columnTypes.add(primitiveTypeInfo);
// separators + escapeChar => "|"
byte[] separators = new byte[]{124, 2, 3, 4, 5, 6, 7, 8};
// sequence =>"\N"
Text sequence = new Text();
sequence.set(new byte[]{92, 78});
// create a lazy struct inspector
ObjectInspector objectInspector =
LazyFactory.createLazyStructInspector(columns, columnTypes, separators,
sequence, false, false, (byte) '0');
LazyStruct lazyStruct = (LazyStruct)
LazyFactory.createLazyObject(objectInspector);
// origin row data
String rowData = "1|@|";
// row field delimiter
String fieldDelimiter = "|@|";
// parse row use multi delimit
lazyStruct.parseMultiDelimit(rowData.getBytes(StandardCharsets.UTF_8),
fieldDelimiter.getBytes(StandardCharsets.UTF_8));
// check the first field and second field start position index
// before fix result: 0,1
// after fix result: 0,2
Assert.assertArrayEquals(new int[]{0, 2},
lazyStruct.startPosition);
} catch (Throwable e) {
e.printStackTrace();
throw e;
}
}
```
### Why are the changes needed?
If a table only have one column field with multidelimit，query this column
data is error data.
When I use this data to do other operation(e.g cast use UDFToLong
function),get result is NULL.
### Does this PR introduce _any_ user-facing change?
No
### Is the change a dependency upgrade?
No
### How was this patch tested?
test class:
serde/src/test/org/apache/hadoop/hive/serde2/lazy/TestLazyStruct.java
test function:
org.apache.hadoop.hive.serde2.lazy.TestLazyStruct#testParseMultiDelimit
test command: mvn test -Dtest=TestLazyStruct --pl serde
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