Load Data Using gpload

The gpload utility of SynxDB loads data using readable external tables and the SynxDB parallel file server (gpfdist). It handles parallel file-based external table setup and allows users to configure their data format, external table definition, and gpfdist setup in a single configuration file.

Note

In gpload, MERGE and UPDATE operations are not supported if the target table column name is a reserved keyword, has capital letters, or includes any character that requires quotes " " to identify the column.

To use gpload

Ensure that your environment is set up to run gpload. Some dependent files from your SynxDB installation are required, such as gpfdist and Python 3, as well as network access to the SynxDB segment hosts. gpload also requires that you install the following packages:
```
pip install psycopg2 pyyaml
```

Create your load control file. This is a YAML-formatted file that specifies the SynxDB connection information, gpfdist configuration information, external table options, and data format.

For example:

---
VERSION: 1.0.0.1
DATABASE: ops
USER: gpadmin
HOST: cdw-1
PORT: 5432
GPLOAD:
    INPUT:
    - SOURCE:
        LOCAL_HOSTNAME:
        - etl1-1
        - etl1-2
        - etl1-3
        - etl1-4
        PORT: 8081
        FILE:
        - /var/load/data/*
    - COLUMNS:
        - name: text
        - amount: float4
        - category: text
        - descr: text
        - date: date
    - FORMAT: text
    - DELIMITER: '|'
    - ERROR_LIMIT: 25
    - LOG_ERRORS: true
    OUTPUT:
    - TABLE: payables.expenses
    - MODE: INSERT
    PRELOAD:
    - REUSE_TABLES: true
# SQL:
#   - BEFORE: "INSERT INTO audit VALUES('start', current_timestamp)"
#   - AFTER: "INSERT INTO audit VALUES('end', current_timestamp)"

Run gpload, passing in the load control file. For example:
```
gpload -f my_load.yml
```