grafana/public/app/plugins/datasource/postgres/sql_part.ts

import { SqlPartDef, SqlPart } from 'app/core/components/sql_part/sql_part';

const index = [];

function createPart(part): any {
  const def = index[part.type];
  if (!def) {
    return null;
  }

  return new SqlPart(part, def);
}

function register(options: any) {
  index[options.type] = new SqlPartDef(options);
}

register({
  type: 'column',
  style: 'label',
  params: [{ type: 'column', dynamicLookup: true }],
  defaultParams: ['value'],
});

register({
  type: 'expression',
  style: 'expression',
  label: 'Expr:',
  params: [
    { name: 'left', type: 'string', dynamicLookup: true },
    { name: 'op', type: 'string', dynamicLookup: true },
    { name: 'right', type: 'string', dynamicLookup: true },
  ],
  defaultParams: ['value', '=', 'value'],
});

register({
  type: 'macro',
  style: 'label',
  label: 'Macro:',
  params: [],
  defaultParams: [],
});

register({
  type: 'aggregate',
  style: 'label',
  params: [
    {
      name: 'name',
      type: 'string',
      options: ['avg', 'count', 'min', 'max', 'sum', 'stddev', 'variance'],
    },
  ],
  defaultParams: ['avg'],
});

register({
  type: 'percentile',
  label: 'Aggregate:',
  style: 'label',
  params: [
    {
      name: 'name',
      type: 'string',
      options: ['percentile_cont', 'percentile_disc'],
    },
    {
      name: 'fraction',
      type: 'number',
      options: ['0.5', '0.75', '0.9', '0.95', '0.99'],
    },
  ],
  defaultParams: ['percentile_cont', '0.95'],
});

register({
  type: 'alias',
  style: 'label',
  params: [{ name: 'name', type: 'string', quote: 'double' }],
  defaultParams: ['alias'],
});

register({
  type: 'time',
  style: 'function',
  label: 'time',
  params: [
    {
      name: 'interval',
      type: 'interval',
      options: ['$__interval', '1s', '10s', '1m', '5m', '10m', '15m', '1h'],
    },
    {
      name: 'fill',
      type: 'string',
      options: ['none', 'NULL', 'previous', '0'],
    },
  ],
  defaultParams: ['$__interval', 'none'],
});

register({
  type: 'window',
  style: 'label',
  params: [
    {
      name: 'function',
      type: 'string',
      options: ['delta', 'increase', 'rate', 'sum'],
    },
  ],
  defaultParams: ['increase'],
});

register({
  type: 'moving_window',
  style: 'label',
  label: 'Moving Window:',
  params: [
    {
      name: 'function',
      type: 'string',
      options: ['avg'],
    },
    {
      name: 'window_size',
      type: 'number',
      options: ['3', '5', '7', '10', '20'],
    },
  ],
  defaultParams: ['avg', '5'],
});

export default {
  create: createPart,
};