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feat: add Logarithm, Exponential and Sqrt functions (#3091)
* feat: add Logarithm, Exponential and Sqrt functions Co-authored-by: chappers <[email protected]>
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61 changes: 61 additions & 0 deletions
61
ksql-engine/src/main/java/io/confluent/ksql/function/udf/math/Exp.java
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/* | ||
* Copyright 2018 Confluent Inc. | ||
* | ||
* Licensed under the Confluent Community License; you may not use this file | ||
* except in compliance with the License. You may obtain a copy of the License at | ||
* | ||
* http://www.confluent.io/confluent-community-license | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | ||
* WARRANTIES OF ANY KIND, either express or implied. See the License for the | ||
* specific language governing permissions and limitations under the License. | ||
*/ | ||
|
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package io.confluent.ksql.function.udf.math; | ||
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import io.confluent.ksql.function.udf.Udf; | ||
import io.confluent.ksql.function.udf.UdfDescription; | ||
import io.confluent.ksql.function.udf.UdfParameter; | ||
import io.confluent.ksql.util.KsqlConstants; | ||
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@SuppressWarnings("WeakerAccess") // Invoked via reflection | ||
@UdfDescription( | ||
name = "exp", | ||
author = KsqlConstants.CONFLUENT_AUTHOR, | ||
description = "The exponential of a value." | ||
) | ||
public class Exp { | ||
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@Udf(description = "Returns Euler's number e raised to the power of an INT value.") | ||
public Double exp( | ||
@UdfParameter( | ||
value = "exponent", | ||
description = "the exponent to raise e to." | ||
) final Integer exponent | ||
) { | ||
return exp(exponent == null ? null : exponent.doubleValue()); | ||
} | ||
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@Udf(description = "Returns Euler's number e raised to the power of a BIGINT value.") | ||
public Double exp( | ||
@UdfParameter( | ||
value = "exponent", | ||
description = "the exponent to raise e to." | ||
) final Long exponent | ||
) { | ||
return exp(exponent == null ? null : exponent.doubleValue()); | ||
} | ||
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@Udf(description = "Returns Euler's number e raised to the power of a DOUBLE value.") | ||
public Double exp( | ||
@UdfParameter( | ||
value = "exponent", | ||
description = "the exponent to raise e to." | ||
) final Double exponent | ||
) { | ||
return exponent == null | ||
? null | ||
: Math.exp(exponent); | ||
} | ||
} |
60 changes: 60 additions & 0 deletions
60
ksql-engine/src/main/java/io/confluent/ksql/function/udf/math/Ln.java
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/* | ||
* Copyright 2018 Confluent Inc. | ||
* | ||
* Licensed under the Confluent Community License; you may not use this file | ||
* except in compliance with the License. You may obtain a copy of the License at | ||
* | ||
* http://www.confluent.io/confluent-community-license | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | ||
* WARRANTIES OF ANY KIND, either express or implied. See the License for the | ||
* specific language governing permissions and limitations under the License. | ||
*/ | ||
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package io.confluent.ksql.function.udf.math; | ||
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import io.confluent.ksql.function.udf.Udf; | ||
import io.confluent.ksql.function.udf.UdfDescription; | ||
import io.confluent.ksql.function.udf.UdfParameter; | ||
import io.confluent.ksql.util.KsqlConstants; | ||
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@UdfDescription( | ||
name = "ln", | ||
author = KsqlConstants.CONFLUENT_AUTHOR, | ||
description = "The natural logarithm of a value." | ||
) | ||
public class Ln { | ||
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@Udf(description = "Returns the natural logarithm (base e) of an INT value.") | ||
public Double ln( | ||
@UdfParameter( | ||
value = "value", | ||
description = "the value get the natual logarithm of." | ||
) final Integer value | ||
) { | ||
return ln(value == null ? null : value.doubleValue()); | ||
} | ||
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@Udf(description = "Returns the natural logarithm (base e) of a BIGINT value.") | ||
public Double ln( | ||
@UdfParameter( | ||
value = "value", | ||
description = "the value get the natual logarithm of." | ||
) final Long value | ||
) { | ||
return ln(value == null ? null : value.doubleValue()); | ||
} | ||
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@Udf(description = "Returns the natural logarithm (base e) of a DOUBLE value.") | ||
public Double ln( | ||
@UdfParameter( | ||
value = "value", | ||
description = "the value get the natual logarithm of." | ||
) final Double value | ||
) { | ||
return value == null | ||
? null | ||
: Math.log(value); | ||
} | ||
} |
61 changes: 61 additions & 0 deletions
61
ksql-engine/src/main/java/io/confluent/ksql/function/udf/math/Sqrt.java
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/* | ||
* Copyright 2018 Confluent Inc. | ||
* | ||
* Licensed under the Confluent Community License; you may not use this file | ||
* except in compliance with the License. You may obtain a copy of the License at | ||
* | ||
* http://www.confluent.io/confluent-community-license | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | ||
* WARRANTIES OF ANY KIND, either express or implied. See the License for the | ||
* specific language governing permissions and limitations under the License. | ||
*/ | ||
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package io.confluent.ksql.function.udf.math; | ||
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import io.confluent.ksql.function.udf.Udf; | ||
import io.confluent.ksql.function.udf.UdfDescription; | ||
import io.confluent.ksql.function.udf.UdfParameter; | ||
import io.confluent.ksql.util.KsqlConstants; | ||
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@SuppressWarnings("WeakerAccess") // Invoked via reflection | ||
@UdfDescription( | ||
name = "sqrt", | ||
author = KsqlConstants.CONFLUENT_AUTHOR, | ||
description = "The square root of a value." | ||
) | ||
public class Sqrt { | ||
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@Udf(description = "Returns the correctly rounded positive square root of a DOUBLE value") | ||
public Double sqrt( | ||
@UdfParameter( | ||
value = "value", | ||
description = "The value to get the square root of." | ||
) final Integer value | ||
) { | ||
return sqrt(value == null ? null : value.doubleValue()); | ||
} | ||
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@Udf(description = "Returns the correctly rounded positive square root of a DOUBLE value") | ||
public Double sqrt( | ||
@UdfParameter( | ||
value = "value", | ||
description = "The value to get the square root of." | ||
) final Long value | ||
) { | ||
return sqrt(value == null ? null : value.doubleValue()); | ||
} | ||
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@Udf(description = "Returns the correctly rounded positive square root of a DOUBLE value") | ||
public Double sqrt( | ||
@UdfParameter( | ||
value = "value", | ||
description = "The value to get the square root of." | ||
) final Double value | ||
) { | ||
return value == null | ||
? null | ||
: Math.sqrt(value); | ||
} | ||
} |
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