@grandlinex/bundle-postgresql/dist/mjs/class/PGUpdate.js

> Postgresql support GrandlineX using `pg`

import { CoreDBUpdate, XUtil } from '@grandlinex/core';
export default class PGUpdate extends CoreDBUpdate {
    /**
     * Initialize a new table in the database.
     * This method is used to create a new table in the database.
     * @param className
     */
    initNewTable(className) {
        return this.getDb().getEntityWrapper(className).init();
    }
    /**
     * Alter a table to add a new column.
     * @param className
     * @param columName
     * @param type
     * @param notNull
     * @param defaultValue
     * @param deleteDefault
     * @protected
     */
    async alterTableAddColumn(className, columName, type, notNull, defaultValue, deleteDefault) {
        const db = this.getDb();
        const tableName = XUtil.camelToSnakeCase(className);
        const query = [];
        if (notNull && defaultValue !== undefined) {
            query.push({
                exec: `ALTER TABLE ${db.schemaName}.${tableName} ADD ${columName} ${type} NOT NULL DEFAULT ${defaultValue};`,
                param: [],
            });
        }
        else if (notNull) {
            query.push({
                exec: `ALTER TABLE ${db.schemaName}.${tableName} ADD ${columName} ${type} NOT NULL;`,
                param: [],
            });
        }
        else {
            query.push({
                exec: `ALTER TABLE ${db.schemaName}.${tableName} ADD ${columName} ${type};`,
                param: [],
            });
        }
        if (defaultValue !== undefined && deleteDefault) {
            query.push({
                exec: `ALTER TABLE ${db.schemaName}.${tableName} ALTER COLUMN ${columName} DROP DEFAULT ;`,
                param: [],
            });
        }
        return (await db.execScripts(query)).every((e) => e !== null);
    }
    /**
     * Alter a table to delete a column.
     * This method is used to remove a column from an existing table in the database.
     * @param className
     * @param columName
     * @protected
     */
    async alterTableDeleteColumn(className, columName) {
        const db = this.getDb();
        const tableName = XUtil.camelToSnakeCase(className);
        const query = [];
        query.push({
            exec: `ALTER TABLE ${db.schemaName}.${tableName} DROP COLUMN ${columName};`,
            param: [],
        });
        return (await db.execScripts(query)).every((e) => e !== null);
    }
}