Examples with LambdaExpression com.facebook.presto.sql.tree.LambdaExpression used on opensource projects

Example 1 with LambdaExpression

use of com.facebook.presto.sql.tree.LambdaExpression in project presto by prestodb.

the class TestSqlParser method testLambda.

@Test
public void testLambda() throws Exception {
    assertExpression("x -> sin(x)", new LambdaExpression(ImmutableList.of(new LambdaArgumentDeclaration("x")), new FunctionCall(QualifiedName.of("sin"), ImmutableList.of(new Identifier("x")))));
    assertExpression("(x, y) -> mod(x, y)", new LambdaExpression(ImmutableList.of(new LambdaArgumentDeclaration("x"), new LambdaArgumentDeclaration("y")), new FunctionCall(QualifiedName.of("mod"), ImmutableList.of(new Identifier("x"), new Identifier("y")))));
}

Example 2 with LambdaExpression

use of com.facebook.presto.sql.tree.LambdaExpression in project presto by prestodb.

the class AstBuilder method visitLambda.

@Override
public Node visitLambda(SqlBaseParser.LambdaContext context) {
    List<LambdaArgumentDeclaration> arguments = context.identifier().stream().map(SqlBaseParser.IdentifierContext::getText).map(LambdaArgumentDeclaration::new).collect(toList());
    Expression body = (Expression) visit(context.expression());
    return new LambdaExpression(arguments, body);
}