danny0405 commented on a change in pull request #1528: [CALCITE-3436]
CalciteConnectionConfigImpl.set obliterates previous property values
URL: https://github.com/apache/calcite/pull/1528#discussion_r338512397
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File path:
core/src/main/java/org/apache/calcite/config/CalciteConnectionConfigImpl.java
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@@ -40,8 +40,10 @@ public CalciteConnectionConfigImpl(Properties properties) {
/** Returns a copy of this configuration with one property changed. */
public CalciteConnectionConfigImpl set(CalciteConnectionProperty property,
String value) {
- final Properties properties1 = new Properties(properties);
- properties1.setProperty(property.camelName(), value);
+ final Properties properties1 = (Properties) this.properties.clone();
+ if (properties1.getProperty(property.camelName()) == null) {
+ properties1.setProperty(property.camelName(), value);
+ }
Review comment:
Thanks, can you explain why we can not override ? It seems that the defaults
and the re-set values are the same right ?
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