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Remove multiple registration of sim functions #768

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Remove multiple registration of sim functions #768

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cdef275
Remove multiple registration of sim function
gnanaprakash-ravi Jan 18, 2024
13785b0
Remove multiple registration of sim function
gnanaprakash-ravi Jan 18, 2024
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16 changes: 15 additions & 1 deletion spark/core/src/main/java/zingg/spark/core/similarity/SparkTransformer.java
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Expand Up @@ -10,6 +10,7 @@

public class SparkTransformer extends SparkBaseTransformer {
private static final long serialVersionUID = 1L;
private static boolean udfRegistered = false;

protected SparkSimFunction function;

Expand All @@ -26,7 +27,20 @@ public SparkTransformer(String inputCol, SparkSimFunction function, String outpu


public void register(SparkSession spark) {
spark.udf().register(getUid(), (UDF2) function, DataTypes.DoubleType);
if (!isUDFRegistered(spark, getUid())) {
spark.udf().register(getUid(), (UDF2) function, DataTypes.DoubleType);
udfRegistered = true;
} else {
udfRegistered = true;
}
}

private boolean isUDFRegistered(SparkSession spark, String udfName) {
try {
return spark.catalog().functionExists(udfName);
} catch (Exception e) {
return false; // UDF is not registered
}
}


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