amrishlal commented on a change in pull request #7259:
URL: https://github.com/apache/pinot/pull/7259#discussion_r683861872
##########
File path: pinot-spi/src/main/java/org/apache/pinot/spi/data/Schema.java
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@@ -673,7 +679,15 @@ public boolean isBackwardCompatibleWith(Schema oldSchema) {
FieldSpec oldSchemaFieldSpec = entry.getValue();
FieldSpec fieldSpec = getFieldSpecFor(oldSchemaColumnName);
if (!fieldSpec.equals(oldSchemaFieldSpec)) {
- return false;
+ if (fieldSpec.getDataType() == DataType.BOOLEAN) {
+ // For BOOLEAN data type, replace with STRING and compare again to
keep backward-compatibility
+ fieldSpec.setDataType(DataType.STRING);
+ if (!fieldSpec.equals(oldSchemaFieldSpec)) {
+ return false;
+ }
+ } else {
+ return false;
+ }
}
Review comment:
Would suggest simplifying this code block (three nested if statements
and three returns) to:
```
if (fieldSpec.getDataType() == DataType.BOOLEAN &&
oldSchemaFieldSpec.getDataType() == DataType.STRING) {
// Replace BOOLEAN with STRING if existing FieldSpec is STRING.
fieldSpec.setDataType(DataType.STRING);
}
if (fieldSpec.equals(oldSchemaFieldSpec)) {
return false;
}
```
otherwise, LGTM.
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