本文整理了Java中com.facebook.presto.sql.QueryUtil.equal方法的一些代码示例，展示了QueryUtil.equal的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。QueryUtil.equal方法的具体详情如下：
包路径：com.facebook.presto.sql.QueryUtil
类名称：QueryUtil
方法名：equal

QueryUtil.equal介绍

暂无

代码示例

代码示例来源：origin: prestodb/presto

@Override
protected Node visitShowColumns(ShowColumns showColumns, Void context)
{
  QualifiedObjectName tableName = createQualifiedObjectName(session, showColumns, showColumns.getTable());
  if (!metadata.getView(session, tableName).isPresent() &&
      !metadata.getTableHandle(session, tableName).isPresent()) {
    throw new SemanticException(MISSING_TABLE, showColumns, "Table '%s' does not exist", tableName);
  }
  return simpleQuery(
      selectList(
          aliasedName("column_name", "Column"),
          aliasedName("data_type", "Type"),
          aliasedNullToEmpty("extra_info", "Extra"),
          aliasedNullToEmpty("comment", "Comment")),
      from(tableName.getCatalogName(), TABLE_COLUMNS),
      logicalAnd(
          equal(identifier("table_schema"), new StringLiteral(tableName.getSchemaName())),
          equal(identifier("table_name"), new StringLiteral(tableName.getObjectName()))),
      ordering(ascending("ordinal_position")));
}

代码示例来源：origin: prestodb/presto

new CatalogSchemaName(catalogName, qualifiedTableName.getSchemaName()));
predicate = Optional.of(equal(identifier("table_name"), new StringLiteral(qualifiedTableName.getObjectName())));

代码示例来源：origin: prestodb/presto

@Override
protected Node visitShowTables(ShowTables showTables, Void context)
{
  CatalogSchemaName schema = createCatalogSchemaName(session, showTables, showTables.getSchema());
  accessControl.checkCanShowTablesMetadata(session.getRequiredTransactionId(), session.getIdentity(), schema);
  if (!metadata.catalogExists(session, schema.getCatalogName())) {
    throw new SemanticException(MISSING_CATALOG, showTables, "Catalog '%s' does not exist", schema.getCatalogName());
  }
  if (!metadata.schemaExists(session, schema)) {
    throw new SemanticException(MISSING_SCHEMA, showTables, "Schema '%s' does not exist", schema.getSchemaName());
  }
  Expression predicate = equal(identifier("table_schema"), new StringLiteral(schema.getSchemaName()));
  Optional<String> likePattern = showTables.getLikePattern();
  if (likePattern.isPresent()) {
    Expression likePredicate = new LikePredicate(
        identifier("table_name"),
        new StringLiteral(likePattern.get()),
        showTables.getEscape().map(StringLiteral::new));
    predicate = logicalAnd(predicate, likePredicate);
  }
  return simpleQuery(
      selectList(aliasedName("table_name", "Table")),
      from(schema.getCatalogName(), TABLE_TABLES),
      predicate,
      ordering(ascending("table_name")));
}

代码示例来源：origin: uk.co.nichesolutions.presto/presto-main

Expression predicate = equal(nameReference("table_schema"), new StringLiteral(schemaName));

代码示例来源：origin: uk.co.nichesolutions.presto/presto-main

for (ColumnHandle columnHandle : partitionColumns) {
  ColumnMetadata column = metadata.getColumnMetadata(session, tableHandle.get(), columnHandle);
  Expression key = equal(nameReference("partition_key"), new StringLiteral(column.getName()));
  Expression value = caseWhen(key, nameReference("partition_value"));
  value = new Cast(value, column.getType().getTypeSignature().toString());
    from(table.getCatalogName(), TABLE_INTERNAL_PARTITIONS),
    Optional.of(logicalAnd(
        equal(nameReference("table_schema"), new StringLiteral(table.getSchemaName())),
        equal(nameReference("table_name"), new StringLiteral(table.getObjectName())))),
    Optional.of(new GroupBy(false, ImmutableList.of(new SimpleGroupBy(ImmutableList.of(nameReference("partition_number")))))),
    Optional.empty(),

代码示例来源：origin: uk.co.nichesolutions.presto/presto-main

@Override
protected RelationType visitShowColumns(ShowColumns showColumns, AnalysisContext context)
{
  QualifiedObjectName tableName = createQualifiedObjectName(session, showColumns, showColumns.getTable());
  if (!metadata.getView(session, tableName).isPresent() &&
      !metadata.getTableHandle(session, tableName).isPresent()) {
    throw new SemanticException(MISSING_TABLE, showColumns, "Table '%s' does not exist", tableName);
  }
  Query query = simpleQuery(
      selectList(
          aliasedName("column_name", "Column"),
          aliasedName("data_type", "Type"),
          aliasedNullToEmpty("comment", "Comment")),
      from(tableName.getCatalogName(), TABLE_COLUMNS),
      logicalAnd(
          equal(nameReference("table_schema"), new StringLiteral(tableName.getSchemaName())),
          equal(nameReference("table_name"), new StringLiteral(tableName.getObjectName()))),
      ordering(ascending("ordinal_position")));
  return process(query, context);
}