sql: Fix issues causing failures in SQLSmith

There are (at least) 3 issues that are currently causing the SQLSmith nightly
test to fail:

1. Issue cockroachdb#36830 - panic: windowNode can't be run in local mode
2. Panic when calling builtin functions with ANY parameters
3. Panic when json_build_object is called with DBitArray datum

This commit fixes #2 and #3:

2. SQLSmith now generates a random datum type when it encounters an ANY param.
3. Add DBitArray to the list of datums handled by the json_build_object function.

In addition, the fix for #2 exposed a SQLSmith bug, where it ws unable to
parse the type names of existing tables. The fix is to change typeFromName to
use parser.ParseType.

After these fixes, and once issue cockroachdb#36830 is fixed, the SQLSmith tests should
start passing again in nightlies.

Release note (sql change): Fix panic when json_build_object is called with
BIT/VARBIT values.

pkg/internal/sqlsmith/type.go

@@ -15,36 +15,16 @@
 package sqlsmith
 
 import (
-	"fmt"
-	"strings"
-
+	"github.com/cockroachdb/cockroach/pkg/sql/parser"
+	"github.com/cockroachdb/cockroach/pkg/sql/pgwire/pgerror"
 	"github.com/cockroachdb/cockroach/pkg/sql/sqlbase"
 	"github.com/cockroachdb/cockroach/pkg/sql/types"
 )
 
-var typeNames = func() map[string]*types.T {
-	m := map[string]*types.T{
-		"int4":   types.Int,
-		"int8":   types.Int,
-		"int8[]": types.IntArray,
-		"float4": types.Float,
-		"float8": types.Float,
-	}
-	for _, T := range types.OidToType {
-		m[T.SQLStandardName()] = T
-		m[T.String()] = T
-	}
-	return m
-}()
-
 func typeFromName(name string) *types.T {
-	// Fill in any collated string type names we see.
-	if sp := strings.Split(name, "STRING COLLATE "); len(sp) == 2 {
-		typeNames[strings.ToLower(name)] = types.MakeCollatedString(types.String, sp[1])
-	}
-	typ, ok := typeNames[strings.ToLower(name)]
-	if !ok {
-		panic(fmt.Errorf("unknown type name: %s", name))
+	typ, err := parser.ParseType(name)
+	if err != nil {
+		panic(pgerror.AssertionFailedf("failed to parse type: %v", name))
 	}
 	return typ
 }

pkg/sql/logictest/testdata/logic_test/json_builtins

@@ -481,6 +481,12 @@ SELECT json_build_object(json_object_keys('{"x":3, "y":4}'::JSON), 2)
 {"x": 2}
 {"y": 2}
 
+# Regression for panic when bit array is passed as argument.
+query T
+SELECT json_build_object('a', '0100110'::varbit)
+----
+{"a": "0100110"}
+
 # even number of arguments
 query error pq: json_build_object\(\): argument list must have even number of elements
 SELECT json_build_object(1,2,3)

pkg/sql/sem/builtins/builtins.go

@@ -4473,7 +4473,9 @@ func asJSONBuildObjectKey(d tree.Datum) (string, error) {
 		return string(*t), nil
 	case *tree.DCollatedString:
 		return t.Contents, nil
-	case *tree.DBool, *tree.DInt, *tree.DFloat, *tree.DDecimal, *tree.DTimestamp, *tree.DTimestampTZ, *tree.DDate, *tree.DUuid, *tree.DInterval, *tree.DBytes, *tree.DIPAddr, *tree.DOid, *tree.DTime:
+	case *tree.DBool, *tree.DInt, *tree.DFloat, *tree.DDecimal, *tree.DTimestamp, *tree.DTimestampTZ,
+		*tree.DDate, *tree.DUuid, *tree.DInterval, *tree.DBytes, *tree.DIPAddr, *tree.DOid,
+		*tree.DTime, *tree.DBitArray:
 		return tree.AsStringWithFlags(d, tree.FmtBareStrings), nil
 	default:
 		return "", pgerror.AssertionFailedf("unexpected type %T for key value", d)

pkg/sql/sqlbase/testutils.go

@@ -199,6 +199,8 @@ func RandDatumWithNullChance(rng *rand.Rand, typ *types.T, nullChance int) tree.
 			}
 		}
 		return arr
+	case types.AnyFamily:
+		return RandDatumWithNullChance(rng, RandType(rng), nullChance)
 	default:
 		panic(fmt.Sprintf("invalid type %v", typ.DebugString()))
 	}