Function makeCompiler

packages/sql/pg/src/PgClient.ts:837–878

(
  transform?: (_: string) => string,
  transformJson = true
)

 * @since 4.0.0
 */
export const makeCompiler = (
  transform?: (_: string) => string,
  transformJson = true
): Statement.Compiler => {
  const transformValue = transformJson && transform
    ? Statement.defaultTransforms(transform).value
    : undefined

  return Statement.makeCompiler<PgCustom>({
    dialect: "pg",
    placeholder(_) {
      return `$${_}`
    },
    onIdentifier: transform ?
      function(value, withoutTransform) {
        return withoutTransform ? escape(value) : escape(transform(value))
      } :
      escape,
    onRecordUpdate(placeholders, valueAlias, valueColumns, values, returning) {
      return [
        `(values ${placeholders}) AS ${valueAlias}${valueColumns}${returning ? ` RETURNING ${returning[0]}` : ""}`,
        returning ?
          values.flat().concat(returning[1]) :
          values.flat()
      ]
    },
    onCustom(type, placeholder, withoutTransform) {
      switch (type.kind) {
        case "PgJson": {
          return [
            placeholder(undefined),
            [
              withoutTransform || transformValue === undefined
                ? type.paramA
                : transformValue(type.paramA)
            ]
          ]
        }
      }
    }
  })
}

const escape = Statement.defaultEscape("\"")