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Connect AWS Redshift and Supabase CSV file in our serverless environment

Use this template to Read rows from AWS Redshift table using them to create CSV file entries in Supabase bucket.

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Read rows from AWS Redshift table

Used integrations:
class AwsRedshiftSourceSelect {
    async init() {
        // TODO: Create your aws-redshift credential
        // More info at https://yepcode.io/docs/integrations/aws-redshift/#credential-configuration
        this.awsRedshift = yepcode.integration.awsRedshift(
            "your-aws-redshift-credential-name"
        );

        // TODO: Customize the command to be executed
        // More info at https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-redshift-data/interfaces/executestatementcommandinput.html
        const {
            Id
        } = await this.awsRedshift.send(
            new ExecuteStatementCommand({
                ClusterIdentifier: "your-cluster-identifier",
                Database: "your-database-name",
                DbUser: "your-database-user",
                Sql: "SELECT * FROM your-table-name;",
            })
        );
        this.statementId = Id;
        await this._awaitStatementToFinish();
    }

    async fetch(publish, done) {
        let nextToken;
        // if result is returned paginated, iterate to publish entire statement result
        do {
            const result = await this.awsRedshift.send(
                new GetStatementResultCommand({
                    Id: this.statementId,
                    NextToken: nextToken,
                })
            );
            nextToken = result.NextToken;
            for (const record of result.Records) {
                // Each record come as a list of record cells
                // More info at https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-redshift-data/interfaces/getstatementresultcommandoutput.html

                // TODO: Customize record columns mapping to the item that will be published
                const item = {
                    id: record.id,
                    ...record
                };

                await publish(item);
            }
        } while (nextToken);
        done();
    }

    async close() {}

    _awaitStatementToFinish() {
        return new Promise((resolve, reject) => {
            const describeStatementCommand = new DescribeStatementCommand({
                Id: this.statementId,
            });

            // Configure interval to check statement status
            const intervalId = setInterval(async () => {
                const result = await this.awsRedshift.send(describeStatementCommand);
                if (result.Status === "FINISHED") {
                    clearInterval(intervalId);
                    resolve();
                    return;
                }

                if (result.Status === "FAILED" || result.Status === "ABORTED") {
                    clearInterval(intervalId);
                    reject();
                    return;
                }
            }, 1000);
        });
    }
}

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Create CSV file entries in Supabase bucket

Used integrations:
class SupabaseTargetUploadCsv {
    async init() {
        // TODO: Create your supabase credential
        // More info at https://yepcode.io/docs/integrations/supabase/#credential-configuration
        this.supabase = yepcode.integration.supabase(
            "your-supabase-credential-name"
        );

        this.items = [];
    }

    async consume(item) {
        // TODO: Customize your csv row
        const csvRow = [item.id, item.name];
        this.items.push(csvRow);
    }

    async close() {
        try {
            // Transform items to CSV entries
            const csvFileContent = csv.stringify(this.items, {
                delimiter: ",",
            });
            // TODO: adapt bucket and files management
            // You may check the full API documentation at:
            // Check docs at https://supabase.com/docs/reference/javascript/storage-from-upload
            const {
                data,
                error
            } = await this.supabase.storage
                .from("your-bucket-name")
                .upload(`your-new-file.csv`, csvFileContent, {
                    contentType: "text/csv",
                });

            if (error) {
                throw error;
            }
        } catch (error) {
            console.error(`Error ending upload`, error);
        }
    }
}

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