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Salvo quando diversamente specificato, i contenuti di questa pagina sono concessi in base alla licenza Creative Commons Attribution 4.0, mentre gli esempi di codice sono concessi in base alla licenza Apache 2.0. Per ulteriori dettagli, consulta le norme del sito di Google Developers. Java è un marchio registrato di Oracle e/o delle sue consociate.
[[["Facile da capire","easyToUnderstand","thumb-up"],["Il problema è stato risolto","solvedMyProblem","thumb-up"],["Altra","otherUp","thumb-up"]],[["Difficile da capire","hardToUnderstand","thumb-down"],["Informazioni o codice di esempio errati","incorrectInformationOrSampleCode","thumb-down"],["Mancano le informazioni o gli esempi di cui ho bisogno","missingTheInformationSamplesINeed","thumb-down"],["Problema di traduzione","translationIssue","thumb-down"],["Altra","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis content demonstrates how to perform a full table scan in Bigtable using Go, Java, PHP, and Python.\u003c/p\u003e\n"],["\u003cp\u003eThe examples provide code snippets that read and output all rows in a Bigtable table, showing data for each row key, family, qualifier, and value.\u003c/p\u003e\n"],["\u003cp\u003eTo use these code samples, it's necessary to first install the Bigtable client library and set up Application Default Credentials for authentication.\u003c/p\u003e\n"],["\u003cp\u003eAdditional resources include links to Bigtable client libraries documentation, authentication setup, and the Google Cloud sample browser for further code examples.\u003c/p\u003e\n"]]],[],null,["Perform a full table scan.\n\nExplore further\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Go hello world](/bigtable/docs/samples-go-hello)\n- [Java hello world](/bigtable/docs/samples-java-hello-world)\n- [PHP hello world](/bigtable/docs/samples-php-hello)\n\nCode sample \n\nGo\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n log.Printf(\"Reading all greeting rows:\")\n err = tbl.ReadRows(ctx, bigtable.PrefixRange(columnName), func(row bigtable.Row) bool {\n \titem := row[columnFamilyName][0]\n \tlog.Printf(\"\\t%s = %s\\n\", item.Row, string(item.Value))\n \treturn true\n }, bigtable.RowFilter(bigtable.ColumnFilter(columnName)))\n\n if err = client.Close(); err != nil {\n \tlog.Fatalf(\"Could not close data operations client: %v\", err)\n }\n\nJava\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n try {\n System.out.println(\"\\nReading the entire table\");\n Query query = Query.create(TableId.of(tableId));\n ServerStream\u003cRow\u003e rowStream = dataClient.readRows(query);\n List\u003cRow\u003e tableRows = new ArrayList\u003c\u003e();\n for (Row r : rowStream) {\n System.out.println(\"Row Key: \" + r.getKey().toStringUtf8());\n tableRows.add(r);\n for (RowCell cell : r.getCells()) {\n System.out.printf(\n \"Family: %s Qualifier: %s Value: %s%n\",\n cell.getFamily(), cell.getQualifier().toStringUtf8(), cell.getValue().toStringUtf8());\n }\n }\n return tableRows;\n } catch (NotFoundException e) {\n System.err.println(\"Failed to read a non-existent table: \" + e.getMessage());\n return null;\n }\n\nPHP\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n $columnFamilyId = 'cf1';\n $column = 'greeting';\n printf('Scanning for all greetings:' . PHP_EOL);\n $partialRows = $table-\u003ereadRows([])-\u003ereadAll();\n foreach ($partialRows as $row) {\n printf('%s' . PHP_EOL, $row[$columnFamilyId][$column][0]['value']);\n }\n\nPython\n\n\nTo learn how to install and use the client library for Bigtable, see\n[Bigtable client libraries](/bigtable/docs/reference/libraries).\n\n\nTo authenticate to Bigtable, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n print(\"Scanning for all greetings:\")\n partial_rows = table.read_rows(filter_=row_filter)\n\n for row in partial_rows:\n cell = row.cells[column_family_id][column][0]\n print(cell.value.decode(\"utf-8\"))\n\nWhat's next\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=bigtable)."]]