Support pgvector operators

Fixes #122

Author: nene

src/parser.pegjs

@@ -7494,6 +7494,8 @@ pg_other_op
   = op:(
     // multi-letter operators (non-exhaustive list)
     "||/" / "|/" / "||" / ">>" / "<<" / "!~~*" / "~~*" / "!~~" / "~~" / "!~*" / "~*" / "!~" / "^@"
+    // pgvector operators
+    / "<+>" / "<->" / "<#>" / "<=>" / "<~>" / "<%>"
     // JSON operators
     / "->>" / "->" / "#>>" / "#>"
     // JSONB operators

test/expr/op_postgres.test.ts

@@ -36,6 +36,14 @@ describe("special PostgreSQL operators", () => {
       "#-",
       "@?",
       "@@",
+      // pgvector
+      // https://github.com/pgvector/pgvector#vector-operators
+      "<+>",
+      "<->",
+      "<#>",
+      "<=>",
+      "<~>",
+      "<%>",
     ].forEach((op) => {
       it(`parses ${op} operator`, () => {
         testExprWc(`x ${op} y`);