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New Row Custom Query from PostgreSQL API

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New Row Custom Query from the PostgreSQL API
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Getting Started

Trigger a workflow on New Row Custom Query with PostgreSQL API. When you configure and deploy the workflow, it will run on Pipedream's servers 24x7 for free.

  1. Configure the New Row Custom Query trigger
    1. Connect your PostgreSQL account
    2. Configure Polling Interval
    3. Configure Reject Unauthorized
    4. Select a Schema
    5. Select a Table
    6. Select a Column
    7. Configure SQL Query
    8. Optional- Configure Values
  2. Add steps to connect to 1,600+ APIs using code and no-code building blocks
  3. Deploy the workflow
  4. Send a test event to validate your setup
  5. Turn on the trigger

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Details

This is a pre-built, source-available component from Pipedream's GitHub repo. The component is developed by Pipedream and the community, and verified and maintained by Pipedream.

To contribute an update to an existing component or create a new component, create a PR on GitHub. If you're new to Pipedream component development, you can start with quickstarts for trigger span and action development, and then review the component API reference.

New Row Custom Query on PostgreSQL
Description:Emit new event when new rows are returned from a custom query that you provide. [See Docs](https://node-postgres.com/features/queries)
Version:0.0.10
Key:postgresql-new-row-custom-query

Code

import common from "../common.mjs";

export default {
  ...common,
  name: "New Row Custom Query",
  key: "postgresql-new-row-custom-query",
  description: "Emit new event when new rows are returned from a custom query that you provide. [See Docs](https://node-postgres.com/features/queries)",
  version: "0.0.10",
  type: "source",
  dedupe: "unique",
  props: {
    ...common.props,
    schema: {
      propDefinition: [
        common.props.postgresql,
        "schema",
        (c) => ({
          rejectUnauthorized: c.rejectUnauthorized,
        }),
      ],
    },
    table: {
      propDefinition: [
        common.props.postgresql,
        "table",
        (c) => ({
          schema: c.schema,
          rejectUnauthorized: c.rejectUnauthorized,
        }),
      ],
    },
    column: {
      propDefinition: [
        common.props.postgresql,
        "column",
        (c) => ({
          table: c.table,
          schema: c.schema,
          rejectUnauthorized: c.rejectUnauthorized,
        }),
      ],
    },
    query: {
      propDefinition: [
        common.props.postgresql,
        "query",
      ],
    },
    values: {
      propDefinition: [
        common.props.postgresql,
        "values",
      ],
    },
  },
  methods: {
    ...common.methods,
    generateMeta(row, column) {
      return {
        id: row[column],
        summary: "New Row",
        ts: Date.now(),
      };
    },
  },
  async run() {
    const {
      schema,
      table,
      column,
      query,
      values = [],
    } = this;

    if (!Array.isArray(values)) {
      throw new Error("No valid values provided. The values property must be an array.");
    }

    const numberOfValues = query?.match(/\$/g)?.length || 0;
    if (values.length !== numberOfValues) {
      throw new Error("The number of values provided does not match the number of values in the query.");
    }

    const isColumnUnique = await this.isColumnUnique(schema, table, column);
    if (!isColumnUnique) {
      throw new Error("The column selected contains duplicate values. Column must be unique");
    }

    const rows = await this.postgresql.executeQuery({
      text: query,
      values,
    }, this.rejectUnauthorized);
    for (const row of rows) {
      const meta = this.generateMeta(row, column);
      this.$emit(row, meta);
    }
  },
};

Configuration

This component may be configured based on the props defined in the component code. Pipedream automatically prompts for input values in the UI and CLI.
LabelPropTypeDescription
PostgreSQLpostgresqlappThis component uses the PostgreSQL app.
N/Adb$.service.dbThis component uses $.service.db to maintain state between executions.
Polling Intervaltimer$.interface.timer

Pipedream will poll the API on this schedule

Reject UnauthorizedrejectUnauthorizedboolean

If true, the server certificate is verified against the list of supplied CAs. If you encounter the error Connection terminated unexpectedly, try setting this prop to false.

SchemaschemastringSelect a value from the drop down menu.
TabletablestringSelect a value from the drop down menu.
ColumncolumnstringSelect a value from the drop down menu.
SQL Queryquerystring

Your custom SQL Query using $1, $2... to represent values (eg. INSERT INTO users(name, email) VALUES($1, $2)

Valuesvaluesstring[]

List of values represented in your SQL Query above

Authentication

PostgreSQL uses API keys for authentication. When you connect your PostgreSQL account, Pipedream securely stores the keys so you can easily authenticate to PostgreSQL APIs in both code and no-code steps.

Before you connect to your PostgreSQL database from Pipedream, please make sure your database is either:

  1. Accessible from the public internet (You may need to add a firewall rule on 0.0.0.0/0 on port 5432), or

  2. Accessible from an SSH server that you route PostgreSQL requests through

After that, enter the following values:

  • host: The hostname or IP address of your PostgreSQL server
  • port: 5432, unless you run PostgreSQL on a different port
  • username: The account username to log in
  • password: The account password to log in
  • database: The name of the PostgreSQL database to run queries against

About PostgreSQL

The World's Most Advanced Open Source Relational Database

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