Membaca semua menggunakan Dataflow
Tetap teratur dengan koleksi
Simpan dan kategorikan konten berdasarkan preferensi Anda.
Gunakan kueri SQL dengan konektor Dataflow untuk membaca data dari semua tabel yang tersedia dalam database.
Mempelajari lebih lanjut
Untuk dokumentasi mendetail yang menyertakan contoh kode ini, lihat artikel berikut:
Contoh kode
Kecuali dinyatakan lain, konten di halaman ini dilisensikan berdasarkan Lisensi Creative Commons Attribution 4.0, sedangkan contoh kode dilisensikan berdasarkan Lisensi Apache 2.0. Untuk mengetahui informasi selengkapnya, lihat Kebijakan Situs Google Developers. Java adalah merek dagang terdaftar dari Oracle dan/atau afiliasinya.
[[["Mudah dipahami","easyToUnderstand","thumb-up"],["Memecahkan masalah saya","solvedMyProblem","thumb-up"],["Lainnya","otherUp","thumb-up"]],[["Sulit dipahami","hardToUnderstand","thumb-down"],["Informasi atau kode contoh salah","incorrectInformationOrSampleCode","thumb-down"],["Informasi/contoh yang saya butuhkan tidak ada","missingTheInformationSamplesINeed","thumb-down"],["Masalah terjemahan","translationIssue","thumb-down"],["Lainnya","otherDown","thumb-down"]],[],[],[],null,["# Dataflow read all\n\nUse SQL queries with the Dataflow connector to read data from all available tables in a database.\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Import, export, and modify data using Dataflow](/spanner/docs/dataflow-connector)\n\nCode sample\n-----------\n\n### Java\n\n\nTo learn how to install and use the client library for Spanner, see\n[Spanner client libraries](/spanner/docs/reference/libraries).\n\n\nTo authenticate to Spanner, 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 PCollection\u003cStruct\u003e allRecords =\n pipeline\n .apply(\n SpannerIO.read()\n .withSpannerConfig(spannerConfig)\n .withBatching(false)\n .withQuery(\n \"SELECT t.table_name FROM information_schema.tables AS t WHERE t\"\n + \".table_catalog = '' AND t.table_schema = ''\"))\n .apply(\n MapElements.into(TypeDescriptor.of(ReadOperation.class))\n .via(\n (SerializableFunction\u003cStruct, ReadOperation\u003e)\n input -\u003e {\n String tableName = input.getString(0);\n return ReadOperation.create().withQuery(\"SELECT * FROM \" + tableName);\n }))\n .apply(SpannerIO.readAll().withSpannerConfig(spannerConfig));\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=spanner)."]]