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Example 1 with RoutineBody

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

the class CreateFunctionTask method createSqlInvokedFunction.

private SqlInvokedFunction createSqlInvokedFunction(CreateFunction statement, Metadata metadata, Analysis analysis) {
    QualifiedObjectName functionName = statement.isTemporary() ? QualifiedObjectName.valueOf(SESSION_NAMESPACE, statement.getFunctionName().getSuffix()) : qualifyObjectName(statement.getFunctionName());
    List<Parameter> parameters = statement.getParameters().stream().map(parameter -> new Parameter(parameter.getName().toString(), parseTypeSignature(parameter.getType()))).collect(toImmutableList());
    TypeSignature returnType = parseTypeSignature(statement.getReturnType());
    String description = statement.getComment().orElse("");
    RoutineCharacteristics routineCharacteristics = RoutineCharacteristics.builder().setLanguage(new RoutineCharacteristics.Language(statement.getCharacteristics().getLanguage().getLanguage())).setDeterminism(RoutineCharacteristics.Determinism.valueOf(statement.getCharacteristics().getDeterminism().name())).setNullCallClause(RoutineCharacteristics.NullCallClause.valueOf(statement.getCharacteristics().getNullCallClause().name())).build();
    RoutineBody body = statement.getBody();
    if (statement.getBody() instanceof Return) {
        Expression bodyExpression = ((Return) statement.getBody()).getExpression();
        Type bodyType = analysis.getType(bodyExpression);
        // Coerce expressions in body if necessary
        bodyExpression = ExpressionTreeRewriter.rewriteWith(new ExpressionRewriter<Void>() {

            @Override
            public Expression rewriteExpression(Expression expression, Void context, ExpressionTreeRewriter<Void> treeRewriter) {
                Expression rewritten = treeRewriter.defaultRewrite(expression, null);
                Type coercion = analysis.getCoercion(expression);
                if (coercion != null) {
                    return new Cast(rewritten, coercion.getTypeSignature().toString(), false, analysis.isTypeOnlyCoercion(expression));
                }
                return rewritten;
            }
        }, bodyExpression, null);
        if (!bodyType.equals(metadata.getType(returnType))) {
            // Casting is safe here, since we have verified at analysis time that the actual type of the body is coercible to declared return type.
            bodyExpression = new Cast(bodyExpression, statement.getReturnType());
        }
        body = new Return(bodyExpression);
    }
    return new SqlInvokedFunction(functionName, parameters, returnType, description, routineCharacteristics, formatSql(body, Optional.empty()), notVersioned());
}
Also used : ExpressionTreeRewriter(com.facebook.presto.sql.tree.ExpressionTreeRewriter) WarningCollector(com.facebook.presto.spi.WarningCollector) Parameter(com.facebook.presto.spi.function.Parameter) Analyzer(com.facebook.presto.sql.analyzer.Analyzer) ListenableFuture(com.google.common.util.concurrent.ListenableFuture) SESSION_NAMESPACE(com.facebook.presto.metadata.SessionFunctionHandle.SESSION_NAMESPACE) SqlInvokedFunction(com.facebook.presto.spi.function.SqlInvokedFunction) PrestoException(com.facebook.presto.spi.PrestoException) CreateFunction(com.facebook.presto.sql.tree.CreateFunction) TypeSignature(com.facebook.presto.common.type.TypeSignature) Inject(javax.inject.Inject) ALREADY_EXISTS(com.facebook.presto.spi.StandardErrorCode.ALREADY_EXISTS) Map(java.util.Map) Objects.requireNonNull(java.util.Objects.requireNonNull) QualifiedObjectName(com.facebook.presto.common.QualifiedObjectName) Cast(com.facebook.presto.sql.tree.Cast) SqlFunctionHandle(com.facebook.presto.spi.function.SqlFunctionHandle) TransactionManager(com.facebook.presto.transaction.TransactionManager) FunctionAndTypeManager.qualifyObjectName(com.facebook.presto.metadata.FunctionAndTypeManager.qualifyObjectName) Type(com.facebook.presto.common.type.Type) RoutineCharacteristics(com.facebook.presto.spi.function.RoutineCharacteristics) Futures.immediateFuture(com.google.common.util.concurrent.Futures.immediateFuture) Session(com.facebook.presto.Session) ImmutableList.toImmutableList(com.google.common.collect.ImmutableList.toImmutableList) RoutineBody(com.facebook.presto.sql.tree.RoutineBody) ConcurrentHashMap(java.util.concurrent.ConcurrentHashMap) String.format(java.lang.String.format) SqlParser(com.facebook.presto.sql.parser.SqlParser) ExpressionRewriter(com.facebook.presto.sql.tree.ExpressionRewriter) List(java.util.List) SqlFunctionId(com.facebook.presto.spi.function.SqlFunctionId) TypeSignature.parseTypeSignature(com.facebook.presto.common.type.TypeSignature.parseTypeSignature) Expression(com.facebook.presto.sql.tree.Expression) NOT_SUPPORTED(com.facebook.presto.spi.StandardErrorCode.NOT_SUPPORTED) Return(com.facebook.presto.sql.tree.Return) FunctionVersion.notVersioned(com.facebook.presto.spi.function.FunctionVersion.notVersioned) SqlFormatter.formatSql(com.facebook.presto.sql.SqlFormatter.formatSql) Analysis(com.facebook.presto.sql.analyzer.Analysis) Optional(java.util.Optional) VisibleForTesting(com.google.common.annotations.VisibleForTesting) Metadata(com.facebook.presto.metadata.Metadata) AccessControl(com.facebook.presto.security.AccessControl) Cast(com.facebook.presto.sql.tree.Cast) ExpressionTreeRewriter(com.facebook.presto.sql.tree.ExpressionTreeRewriter) Return(com.facebook.presto.sql.tree.Return) SqlInvokedFunction(com.facebook.presto.spi.function.SqlInvokedFunction) QualifiedObjectName(com.facebook.presto.common.QualifiedObjectName) TypeSignature(com.facebook.presto.common.type.TypeSignature) TypeSignature.parseTypeSignature(com.facebook.presto.common.type.TypeSignature.parseTypeSignature) Type(com.facebook.presto.common.type.Type) ExpressionRewriter(com.facebook.presto.sql.tree.ExpressionRewriter) RoutineCharacteristics(com.facebook.presto.spi.function.RoutineCharacteristics) Expression(com.facebook.presto.sql.tree.Expression) Parameter(com.facebook.presto.spi.function.Parameter) RoutineBody(com.facebook.presto.sql.tree.RoutineBody)

Aggregations

Session (com.facebook.presto.Session)1 QualifiedObjectName (com.facebook.presto.common.QualifiedObjectName)1 Type (com.facebook.presto.common.type.Type)1 TypeSignature (com.facebook.presto.common.type.TypeSignature)1 TypeSignature.parseTypeSignature (com.facebook.presto.common.type.TypeSignature.parseTypeSignature)1 FunctionAndTypeManager.qualifyObjectName (com.facebook.presto.metadata.FunctionAndTypeManager.qualifyObjectName)1 Metadata (com.facebook.presto.metadata.Metadata)1 SESSION_NAMESPACE (com.facebook.presto.metadata.SessionFunctionHandle.SESSION_NAMESPACE)1 AccessControl (com.facebook.presto.security.AccessControl)1 PrestoException (com.facebook.presto.spi.PrestoException)1 ALREADY_EXISTS (com.facebook.presto.spi.StandardErrorCode.ALREADY_EXISTS)1 NOT_SUPPORTED (com.facebook.presto.spi.StandardErrorCode.NOT_SUPPORTED)1 WarningCollector (com.facebook.presto.spi.WarningCollector)1 FunctionVersion.notVersioned (com.facebook.presto.spi.function.FunctionVersion.notVersioned)1 Parameter (com.facebook.presto.spi.function.Parameter)1 RoutineCharacteristics (com.facebook.presto.spi.function.RoutineCharacteristics)1 SqlFunctionHandle (com.facebook.presto.spi.function.SqlFunctionHandle)1 SqlFunctionId (com.facebook.presto.spi.function.SqlFunctionId)1 SqlInvokedFunction (com.facebook.presto.spi.function.SqlInvokedFunction)1 SqlFormatter.formatSql (com.facebook.presto.sql.SqlFormatter.formatSql)1