Mengonfigurasi database Cloud SQL untuk PostgreSQL
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Bagian berikut membahas cara mengonfigurasi database Cloud SQL untuk PostgreSQL.
Mengaktifkan replikasi logis
Buka Cloud SQL di konsol Google Cloud .
Buka instance Cloud SQL dan klik EDIT.
Buka bagian Flag.
Klik TAMBAHKAN BENDERA.
Pilih bendera cloudsql.logical_decoding dari menu drop-down.
Tetapkan nilai flag ke on.
Klik SIMPAN untuk menyimpan perubahan. Anda harus memulai ulang instance untuk memperbarui instance dengan perubahan.
Setelah instance Anda dimulai ulang, konfirmasi perubahan di bagian
Flag database di halaman Ringkasan.
Buat publikasi dan slot replikasi
Hubungkan ke database sebagai pengguna dengan hak istimewa yang memadai untuk membuat slot replikasi; jika tidak, jalankan perintah berikut:
ALTER USER USER_NAME WITH REPLICATION;
Ganti kode berikut:
USER_NAME: Nama pengguna yang ingin Anda beri hak istimewa
replikasi.
Buat publikasi. Sebaiknya buat publikasi hanya untuk tabel yang ingin direplikasi. Hal ini memungkinkan Datastream membaca saja data yang relevan, dan mengurangi beban pada database dan Datastream:
CREATE PUBLICATION PUBLICATION_NAME
FOR TABLE SCHEMA1.TABLE1, SCHEMA2.TABLE2;
Ganti kode berikut:
PUBLICATION_NAME: Nama publikasi Anda. Anda
harus memberikan nama ini saat membuat aliran data di wizard pembuatan aliran
Datastream.
SCHEMA: Nama skema yang berisi tabel.
TABLE: Nama tabel yang ingin Anda replikasi.
Anda juga dapat membuat publikasi untuk semua tabel di database Anda. Perhatikan bahwa pendekatan ini meningkatkan beban pada database sumber dan Datastream:
CREATE PUBLICATION PUBLICATION_NAME FOR ALL TABLES;
Buat slot replikasi dengan memasukkan perintah SQL berikut:
REPLICATION_SLOT_NAME: Nama slot replikasi Anda.
Anda harus memberikan nama ini saat membuat streaming di wizard pembuatan streaming Datastream.
Membuat pengguna Datastream
Hubungkan ke database menggunakan klien PostgreSQL.
Masukkan perintah PostgreSQL berikut:
CREATE USER USER_NAME WITH REPLICATION LOGIN PASSWORD 'USER_PASSWORD';
Ganti kode berikut:
USER_NAME: Nama pengguna Datastream yang ingin Anda buat.
USER_PASSWORD: Sandi login untuk pengguna Datastream
yang ingin Anda buat.
Berikan hak istimewa berikut kepada pengguna yang Anda buat:
GRANT SELECT ON ALL TABLES IN SCHEMA SCHEMA_NAME TO USER_NAME;
GRANT USAGE ON SCHEMA SCHEMA_NAME TO USER_NAME;
ALTER DEFAULT PRIVILEGES IN SCHEMA SCHEMA_NAME
GRANT SELECT ON TABLES TO USER_NAME;
Ganti kode berikut:
SCHEMA_NAME: Nama skema yang ingin Anda beri
hak istimewa.
USER_NAME: Pengguna yang ingin Anda beri hak istimewa.
Langkah berikutnya
Pelajari lebih lanjut cara kerja Datastream dengan sumber PostgreSQL.
[[["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"]],["Terakhir diperbarui pada 2025-08-12 UTC."],[[["\u003cp\u003eEnable logical replication in Cloud SQL by setting the \u003ccode\u003ecloudsql.logical_decoding\u003c/code\u003e flag to 'on' and restarting the instance to apply the changes.\u003c/p\u003e\n"],["\u003cp\u003eCreate a publication for specific tables or all tables, using the \u003ccode\u003eCREATE PUBLICATION\u003c/code\u003e command, to manage the data intended for replication.\u003c/p\u003e\n"],["\u003cp\u003eEstablish a replication slot with a unique name using the \u003ccode\u003ePG_CREATE_LOGICAL_REPLICATION_SLOT\u003c/code\u003e function for each stream replicating from the database.\u003c/p\u003e\n"],["\u003cp\u003eCreate a dedicated Datastream user with replication and login privileges, then grant it necessary \u003ccode\u003eSELECT\u003c/code\u003e and \u003ccode\u003eUSAGE\u003c/code\u003e privileges on the required schemas.\u003c/p\u003e\n"]]],[],null,["# Configure a Cloud SQL for PostgreSQL database\n\nThe following sections cover how to configure a Cloud SQL for PostgreSQL database.\n\n### Enable logical replication\n\n1. Navigate to Cloud SQL in the Google Cloud console.\n\n2. Open the Cloud SQL instance and click **EDIT**.\n\n3. Go to the **Flags** section.\n\n4. Click **ADD FLAG**.\n\n5. Choose the `cloudsql.logical_decoding` flag from the drop-down menu.\n\n6. Set the flag value to **on**.\n\n7. Click **SAVE** to save your changes. You'll need to restart your instance to\n update your instance with the changes.\n\n8. Once your instance has been restarted, confirm your changes under\n **Database flags** on the **Overview** page.\n\n### Create a publication and a replication slot\n\n1. Connect to the database as a user with sufficient privileges to create a replication slot; otherwise, run the following command:\n\n ```\n ALTER USER USER_NAME WITH REPLICATION;\n ```\n\n Replace the following:\n - \u003cvar translate=\"no\"\u003eUSER_NAME\u003c/var\u003e: The name of the user to whom you want to grant replication privileges.\n\n | If your current user can't run the command, then reconnect to the database with the default `postgres` username and run the command.\n2. Create a publication. We recommend that you create a publication only for the\n tables that you want to replicate. This allows Datastream to read-only\n the relevant data, and lowers the load on the database and Datastream:\n\n ```\n CREATE PUBLICATION PUBLICATION_NAME\n FOR TABLE SCHEMA1.TABLE1, SCHEMA2.TABLE2;\n ```\n\n Replace the following:\n - \u003cvar translate=\"no\"\u003ePUBLICATION_NAME\u003c/var\u003e: The name of your publication. You'll need to provide this name when you create a stream in the Datastream stream creation wizard.\n - \u003cvar translate=\"no\"\u003eSCHEMA\u003c/var\u003e: The name of the schema that contains the table.\n - \u003cvar translate=\"no\"\u003eTABLE\u003c/var\u003e: The name of the table that you want to replicate.\n\n You can also create a publication for all tables in your database. Note that\n this approach increases the load on both the source database and Datastream: \n\n ```\n CREATE PUBLICATION PUBLICATION_NAME FOR ALL TABLES;\n ```\n | For PostgreSQL 15 and later, you can create a publication for all tables in a schema. This approach lets you replicate changes for tables in the specified list of schemas, including tables that you create in the future: \n |\n | ```\n | CREATE PUBLICATION PUBLICATION_NAME\n | FOR TABLES IN SCHEMA SCHEMA1, SCHEMA2;\n | ```\n3. Create a replication slot by entering the following SQL command:\n\n ```\n SELECT PG_CREATE_LOGICAL_REPLICATION_SLOT('REPLICATION_SLOT_NAME', 'pgoutput');\n ```\n\n \u003cbr /\u003e\n\n Replace the following:\n - \u003cvar translate=\"no\"\u003eREPLICATION_SLOT_NAME\u003c/var\u003e: The name of your replication slot. You'll need to provide this name when you create a stream in the Datastream stream creation wizard.\n\n | The replication slot name must be unique for each stream that's replicating from this database.\n\n### Create a Datastream user\n\n1. Connect to the database using a PostgreSQL client.\n\n2. Enter the following PostgreSQL command:\n\n ```\n CREATE USER USER_NAME WITH REPLICATION LOGIN PASSWORD 'USER_PASSWORD';\n ```\n\n \u003cbr /\u003e\n\n Replace the following:\n - \u003cvar translate=\"no\"\u003eUSER_NAME\u003c/var\u003e: The name of the Datastream user that you want to create.\n - \u003cvar translate=\"no\"\u003eUSER_PASSWORD\u003c/var\u003e: The login password for the Datastream user that you want to create.\n3. Grant the following privileges to the user you created:\n\n ```\n GRANT SELECT ON ALL TABLES IN SCHEMA SCHEMA_NAME TO USER_NAME;\n GRANT USAGE ON SCHEMA SCHEMA_NAME TO USER_NAME;\n ALTER DEFAULT PRIVILEGES IN SCHEMA SCHEMA_NAME\n GRANT SELECT ON TABLES TO USER_NAME;\n ```\n\n Replace the following:\n - \u003cvar translate=\"no\"\u003eSCHEMA_NAME\u003c/var\u003e: The name of the schema to which you want to grant the privileges.\n - \u003cvar translate=\"no\"\u003eUSER_NAME\u003c/var\u003e: The user to whom you want to grant the privileges.\n\nWhat's next\n-----------\n\n- Learn more about how Datastream works with [PostgreSQL sources](/datastream/docs/sources-postgresql)."]]
