An invalid constraint causes a TypeError

[firelizzard18]

Describe the bug

Executing

CREATE TABLE "age_groups" (
  "age_group_id" uuid NOT NULL,
  "title" text NOT NULL,
  "description" text,
  CONSTRAINT "age_groups_pkey" PRIMARY KEY ("age_groups")
);

results in

TypeError: Cannot read properties of undefined (reading 'hash')
      
      💥 This is a nasty error, which was unexpected by pg-mem. Also known "a bug" 😁 Please file an issue !

The issue is here:

pg-mem/src/table.ts

Lines 593 to 598 in 8f84e85

	for (const e of expressions) {
	const getter = this.selection.getColumn(e.name);
	keys.push({
	value: getter,
	});
	}

If the column doesn't exist, getter and therefore keys[I].value is undefined which causes createIndex to fail.

To Reproduce

Execute the query above.

pg-mem version

pg-mem@^3.0.3:
  version "3.0.3"
  resolved "https://registry.yarnpkg.com/pg-mem/-/pg-mem-3.0.3.tgz#0c8862f9bd096a3dcd2addf97e96675fd687a7ad"
  integrity sha512-Bwg8T46AEMjAmqFT5KIuR2ukRE4GzkVSic7U8CAXqlzFr631N9fTGo4JqNgBHrRCT1qR4Nt2bjZA1AL9JhP4uw==