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/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.trino.operator.scalar;
import io.trino.spi.TrinoException;
import io.trino.spi.block.Block;
import io.trino.spi.function.Convention;
import io.trino.spi.function.Description;
import io.trino.spi.function.OperatorDependency;
import io.trino.spi.function.ScalarFunction;
import io.trino.spi.function.SqlType;
import io.trino.spi.function.TypeParameter;
import io.trino.spi.type.StandardTypes;
import io.trino.spi.type.Type;
import java.lang.invoke.MethodHandle;
import static io.trino.spi.StandardErrorCode.NOT_SUPPORTED;
import static io.trino.spi.function.InvocationConvention.InvocationArgumentConvention.BLOCK_POSITION_NOT_NULL;
import static io.trino.spi.function.InvocationConvention.InvocationArgumentConvention.NEVER_NULL;
import static io.trino.spi.function.InvocationConvention.InvocationReturnConvention.NULLABLE_RETURN;
import static io.trino.spi.function.OperatorType.EQUAL;
import static io.trino.util.Failures.internalError;
@Description("Returns the position of the first occurrence of the given value in array (or 0 if not found)")
@ScalarFunction("array_position")
public final class ArrayPositionFunction
{
private ArrayPositionFunction() {}
@TypeParameter("T")
@SqlType(StandardTypes.BIGINT)
public static long arrayPosition(
@TypeParameter("T") Type type,
@OperatorDependency(
operator = EQUAL,
argumentTypes = {"T", "T"},
convention = @Convention(arguments = {BLOCK_POSITION_NOT_NULL, NEVER_NULL}, result = NULLABLE_RETURN))
MethodHandle equalMethodHandle,
@SqlType("array(T)") Block array,
@SqlType("T") boolean element)
{
int size = array.getPositionCount();
for (int i = 0; i < size; i++) {
if (!array.isNull(i)) {
try {
Boolean result = (Boolean) equalMethodHandle.invokeExact(array, i, element);
checkNotIndeterminate(result);
if (result) {
return i + 1; // result is 1-based (instead of 0)
}
}
catch (Throwable t) {
throw internalError(t);
}
}
}
return 0;
}
@TypeParameter("T")
@SqlType(StandardTypes.BIGINT)
public static long arrayPosition(
@TypeParameter("T") Type type,
@OperatorDependency(
operator = EQUAL,
argumentTypes = {"T", "T"},
convention = @Convention(arguments = {BLOCK_POSITION_NOT_NULL, NEVER_NULL}, result = NULLABLE_RETURN))
MethodHandle equalMethodHandle,
@SqlType("array(T)") Block array,
@SqlType("T") long element)
{
int size = array.getPositionCount();
for (int i = 0; i < size; i++) {
if (!array.isNull(i)) {
try {
Boolean result = (Boolean) equalMethodHandle.invokeExact(array, i, element);
checkNotIndeterminate(result);
if (result) {
return i + 1; // result is 1-based (instead of 0)
}
}
catch (Throwable t) {
throw internalError(t);
}
}
}
return 0;
}
@TypeParameter("T")
@SqlType(StandardTypes.BIGINT)
public static long arrayPosition(
@TypeParameter("T") Type type,
@OperatorDependency(
operator = EQUAL,
argumentTypes = {"T", "T"},
convention = @Convention(arguments = {BLOCK_POSITION_NOT_NULL, NEVER_NULL}, result = NULLABLE_RETURN))
MethodHandle equalMethodHandle,
@SqlType("array(T)") Block array,
@SqlType("T") double element)
{
int size = array.getPositionCount();
for (int i = 0; i < size; i++) {
if (!array.isNull(i)) {
try {
Boolean result = (Boolean) equalMethodHandle.invokeExact(array, i, element);
checkNotIndeterminate(result);
if (result) {
return i + 1; // result is 1-based (instead of 0)
}
}
catch (Throwable t) {
throw internalError(t);
}
}
}
return 0;
}
@TypeParameter("T")
@SqlType(StandardTypes.BIGINT)
public static long arrayPosition(
@TypeParameter("T") Type type,
@OperatorDependency(
operator = EQUAL,
argumentTypes = {"T", "T"},
convention = @Convention(arguments = {BLOCK_POSITION_NOT_NULL, NEVER_NULL}, result = NULLABLE_RETURN))
MethodHandle equalMethodHandle,
@SqlType("array(T)") Block array,
@SqlType("T") Object element)
{
int size = array.getPositionCount();
for (int i = 0; i < size; i++) {
if (!array.isNull(i)) {
try {
Boolean result = (Boolean) equalMethodHandle.invoke(array, i, element);
checkNotIndeterminate(result);
if (result) {
return i + 1; // result is 1-based (instead of 0)
}
}
catch (Throwable t) {
throw internalError(t);
}
}
}
return 0;
}
private static void checkNotIndeterminate(Boolean equalsResult)
{
if (equalsResult == null) {
throw new TrinoException(NOT_SUPPORTED, "array_position does not support arrays with elements that are null or contain null");
}
}
}
