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Expand support of types handled in EXPLAIN (TYPE IO)
It will now work with any type that has a cast to varchar.
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51 changes: 51 additions & 0 deletions
51
presto-main/src/main/java/io/prestosql/sql/planner/planprinter/PlanPrinterUtil.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| /* | ||
| * 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.prestosql.sql.planner.planprinter; | ||
|
|
||
| import io.airlift.slice.Slice; | ||
| import io.prestosql.Session; | ||
| import io.prestosql.metadata.FunctionRegistry; | ||
| import io.prestosql.metadata.OperatorNotFoundException; | ||
| import io.prestosql.metadata.Signature; | ||
| import io.prestosql.spi.type.Type; | ||
| import io.prestosql.sql.InterpretedFunctionInvoker; | ||
|
|
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| import static io.prestosql.spi.type.VarcharType.VARCHAR; | ||
|
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| public final class PlanPrinterUtil | ||
| { | ||
| private PlanPrinterUtil() {} | ||
|
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| static String castToVarchar(Type type, Object value, FunctionRegistry functionRegistry, Session session) | ||
| { | ||
| try { | ||
| return castToVarcharOrFail(type, value, functionRegistry, session); | ||
| } | ||
| catch (OperatorNotFoundException e) { | ||
| return "<UNREPRESENTABLE VALUE>"; | ||
| } | ||
| } | ||
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| static String castToVarcharOrFail(Type type, Object value, FunctionRegistry functionRegistry, Session session) | ||
| throws OperatorNotFoundException | ||
| { | ||
| if (value == null) { | ||
| return "NULL"; | ||
| } | ||
|
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| Signature coercion = functionRegistry.getCoercion(type, VARCHAR); | ||
| Slice coerced = (Slice) new InterpretedFunctionInvoker(functionRegistry).invoke(coercion, session.toConnectorSession(), value); | ||
| return coerced.toStringUtf8(); | ||
| } | ||
| } |