Examples with LambdaVariable io.confluent.ksql.execution.expression.tree.LambdaVariable used on opensource projects

Example 6 with LambdaVariable

use of io.confluent.ksql.execution.expression.tree.LambdaVariable in project ksql by confluentinc.

the class SqlToJavaVisitorTest method shouldGenerateCorrectCodeForLambdaExpression.

@Test
public void shouldGenerateCorrectCodeForLambdaExpression() {
    // Given:
    final UdfFactory udfFactory = mock(UdfFactory.class);
    final KsqlScalarFunction udf = mock(KsqlScalarFunction.class);
    givenUdf("ABS", udfFactory, udf, SqlTypes.STRING);
    givenUdf("TRANSFORM", udfFactory, udf, SqlTypes.STRING);
    when(udf.parameters()).thenReturn(ImmutableList.of(ArrayType.of(ParamTypes.DOUBLE), LambdaType.of(ImmutableList.of(ParamTypes.DOUBLE), ParamTypes.DOUBLE)));
    final Expression expression = new FunctionCall(FunctionName.of("TRANSFORM"), ImmutableList.of(ARRAYCOL, new LambdaFunctionCall(ImmutableList.of("x"), (new FunctionCall(FunctionName.of("ABS"), ImmutableList.of(new LambdaVariable("X")))))));
    // When:
    final String javaExpression = sqlToJavaVisitor.process(expression);
    // Then
    assertThat(javaExpression, equalTo("((String) TRANSFORM_0.evaluate(COL4, new Function() {\n @Override\n public Object apply(Object arg1) {\n   final Double x = (Double) arg1;\n   return ((String) ABS_1.evaluate(X));\n }\n}))"));
}

Example 7 with LambdaVariable

use of io.confluent.ksql.execution.expression.tree.LambdaVariable in project ksql by confluentinc.

the class ExpressionTypeManagerTest method shouldEvaluateAnyNumberOfArgumentLambda.

@Test
public void shouldEvaluateAnyNumberOfArgumentLambda() {
    // Given:
    givenUdfWithNameAndReturnType("TRANSFORM", SqlTypes.STRING);
    when(function.parameters()).thenReturn(ImmutableList.of(ArrayType.of(DoubleType.INSTANCE), StringType.INSTANCE, MapType.of(LongType.INSTANCE, DoubleType.INSTANCE), LambdaType.of(ImmutableList.of(DoubleType.INSTANCE, StringType.INSTANCE, LongType.INSTANCE, DoubleType.INSTANCE), StringType.INSTANCE)));
    final Expression expression = new FunctionCall(FunctionName.of("TRANSFORM"), ImmutableList.of(ARRAYCOL, new StringLiteral("Q"), MAPCOL, new LambdaFunctionCall(ImmutableList.of("A", "B", "C", "D"), new ArithmeticBinaryExpression(Operator.ADD, new LambdaVariable("C"), new IntegerLiteral(5)))));
    // When:
    final SqlType exprType = expressionTypeManager.getExpressionSqlType(expression);
    // Then:
    assertThat(exprType, is(SqlTypes.STRING));
    verify(udfFactory).getFunction(ImmutableList.of(SqlArgument.of(SqlTypes.array(SqlTypes.DOUBLE)), SqlArgument.of(SqlTypes.STRING), SqlArgument.of(SqlTypes.map(SqlTypes.BIGINT, SqlTypes.DOUBLE)), SqlArgument.of(SqlLambda.of(4))));
    verify(function).getReturnType(ImmutableList.of(SqlArgument.of(SqlTypes.array(SqlTypes.DOUBLE)), SqlArgument.of(SqlTypes.STRING), SqlArgument.of(SqlTypes.map(SqlTypes.BIGINT, SqlTypes.DOUBLE)), SqlArgument.of(SqlLambdaResolved.of(ImmutableList.of(SqlTypes.DOUBLE, SqlTypes.STRING, SqlTypes.BIGINT, SqlTypes.DOUBLE), SqlTypes.BIGINT))));
}

Example 8 with LambdaVariable

use of io.confluent.ksql.execution.expression.tree.LambdaVariable in project ksql by confluentinc.

the class ExpressionTypeManagerTest method shouldHandleMultipleLambdasInSameFunctionCallWithDifferentVariableNames.

@Test
public void shouldHandleMultipleLambdasInSameFunctionCallWithDifferentVariableNames() {
    // Given:
    givenUdfWithNameAndReturnType("TRANSFORM", SqlTypes.INTEGER);
    when(function.parameters()).thenReturn(ImmutableList.of(MapType.of(LongType.INSTANCE, DoubleType.INSTANCE), IntegerType.INSTANCE, LambdaType.of(ImmutableList.of(DoubleType.INSTANCE, DoubleType.INSTANCE), StringType.INSTANCE), LambdaType.of(ImmutableList.of(DoubleType.INSTANCE, DoubleType.INSTANCE), StringType.INSTANCE)));
    final Expression expression = new ArithmeticBinaryExpression(Operator.ADD, new FunctionCall(FunctionName.of("TRANSFORM"), ImmutableList.of(MAPCOL, new IntegerLiteral(0), new LambdaFunctionCall(ImmutableList.of("A", "B"), new ArithmeticBinaryExpression(Operator.ADD, new LambdaVariable("A"), new LambdaVariable("B"))), new LambdaFunctionCall(ImmutableList.of("K", "V"), new ArithmeticBinaryExpression(Operator.ADD, new LambdaVariable("K"), new LambdaVariable("V"))))), new IntegerLiteral(5));
    // When:
    final SqlType result = expressionTypeManager.getExpressionSqlType(expression);
    assertThat(result, is(SqlTypes.INTEGER));
}

Example 9 with LambdaVariable

use of io.confluent.ksql.execution.expression.tree.LambdaVariable in project ksql by confluentinc.

the class ExpressionTypeManagerTest method shouldEvaluateLambdaInUDFWithMap.

@Test
public void shouldEvaluateLambdaInUDFWithMap() {
    // Given:
    givenUdfWithNameAndReturnType("TRANSFORM", SqlTypes.DOUBLE);
    when(function.parameters()).thenReturn(ImmutableList.of(MapType.of(DoubleType.INSTANCE, DoubleType.INSTANCE), LambdaType.of(ImmutableList.of(LongType.INSTANCE, DoubleType.INSTANCE), DoubleType.INSTANCE)));
    final Expression expression = new FunctionCall(FunctionName.of("TRANSFORM"), ImmutableList.of(MAPCOL, new LambdaFunctionCall(ImmutableList.of("X", "Y"), new ArithmeticBinaryExpression(Operator.ADD, new LambdaVariable("X"), new IntegerLiteral(5)))));
    // When:
    final SqlType exprType = expressionTypeManager.getExpressionSqlType(expression);
    // Then:
    assertThat(exprType, is(SqlTypes.DOUBLE));
    verify(udfFactory).getFunction(ImmutableList.of(SqlArgument.of(SqlTypes.map(SqlTypes.BIGINT, SqlTypes.DOUBLE)), SqlArgument.of(SqlLambda.of(2))));
    verify(function).getReturnType(ImmutableList.of(SqlArgument.of(SqlTypes.map(SqlTypes.BIGINT, SqlTypes.DOUBLE)), SqlArgument.of(SqlLambdaResolved.of(ImmutableList.of(SqlTypes.BIGINT, SqlTypes.DOUBLE), SqlTypes.BIGINT))));
}

Example 10 with LambdaVariable

use of io.confluent.ksql.execution.expression.tree.LambdaVariable in project ksql by confluentinc.

the class CoercionUtilTest method shouldCoerceLambdaVariables.

@Test
public void shouldCoerceLambdaVariables() {
    // Given:
    final ImmutableList<Expression> expressions = ImmutableList.of(BIGINT_EXPRESSION, new LambdaVariable("X"), INT_EXPRESSION);
    // When:
    final Result result = CoercionUtil.coerceUserList(expressions, typeManager, Collections.singletonMap("X", SqlTypes.INTEGER));
    // Then:
    assertThat(result.commonType(), is(Optional.of(SqlTypes.BIGINT)));
    assertThat(result.expressions(), is(ImmutableList.of(BIGINT_EXPRESSION, cast(new LambdaVariable("X"), SqlTypes.BIGINT), cast(INT_EXPRESSION, SqlTypes.BIGINT))));
}