Fix JSON path type accessor parsing and projection ORDER BY

- Add handling for `.:TypeName` syntax in parseArrayAccess after `[]`
  This allows parsing expressions like `json.c[].d.:Int64`

- Fix projection ORDER BY to use parseExpression instead of just reading
  a single identifier, allowing qualified identifiers like `json.a`, `t.a`,
  and `json.c[].d.:Int64`

Fixes 22 statements in 03464_projections_with_subcolumns and
additional statements in other tests.

Author: claude

parser/expression.go

@@ -1857,6 +1857,15 @@ func (p *Parser) parseArrayAccess(left ast.Expression) ast.Expression {
 					} else {
 						break
 					}
+				} else if p.currentIs(token.COLON) {
+					// JSON subcolumn type accessor: json.field.:`TypeName`
+					p.nextToken() // skip :
+					typePart := ":"
+					if p.currentIs(token.IDENT) || p.current.Token.IsKeyword() || p.currentIs(token.STRING) {
+						typePart += "`" + p.current.Value + "`"
+						p.nextToken()
+					}
+					ident.Parts = append(ident.Parts, typePart)
 				} else if p.currentIs(token.IDENT) || p.current.Token.IsKeyword() {
 					ident.Parts = append(ident.Parts, p.current.Value)
 					p.nextToken()

parser/parser.go

@@ -5343,14 +5343,11 @@ func (p *Parser) parseProjection() *ast.Projection {
 		if p.currentIs(token.BY) {
 			p.nextToken() // BY
 		}
-		// Parse ORDER BY columns (comma-separated identifiers)
+		// Parse ORDER BY columns (comma-separated expressions)
 		for !p.currentIs(token.EOF) && !p.currentIs(token.RPAREN) {
-			if p.currentIs(token.IDENT) || p.current.Token.IsKeyword() {
-				proj.Select.OrderBy = append(proj.Select.OrderBy, &ast.Identifier{
-					Position: p.current.Pos,
-					Parts:    []string{p.current.Value},
-				})
-				p.nextToken()
+			expr := p.parseExpression(LOWEST)
+			if expr != nil {
+				proj.Select.OrderBy = append(proj.Select.OrderBy, expr)
 			} else {
 				break
 			}

parser/testdata/00515_enhanced_time_zones/metadata.json

@@ -1,6 +1 @@
-{
-  "explain_todo": {
-    "stmt44": true,
-    "stmt49": true
-  }
-}
+{}

parser/testdata/01710_normal_projection_format/metadata.json

@@ -1,5 +1 @@
-{
-  "explain_todo": {
-    "stmt3": true
-  }
-}
+{}

parser/testdata/02816_check_projection_metadata/metadata.json

@@ -1,5 +1 @@
-{
-  "explain_todo": {
-    "stmt1": true
-  }
-}
+{}

parser/testdata/02997_projections_formatting/metadata.json

@@ -1,8 +1,6 @@
 {
   "explain_todo": {
-    "stmt1": true,
     "stmt2": true,
-    "stmt3": true,
     "stmt4": true
   }
 }

parser/testdata/03208_array_of_json_read_subcolumns_2_memory/metadata.json

@@ -1,17 +1,5 @@
 {
   "explain_todo": {
-    "stmt18": true,
-    "stmt20": true,
-    "stmt23": true,
-    "stmt24": true,
-    "stmt27": true,
-    "stmt28": true,
-    "stmt30": true,
-    "stmt32": true,
-    "stmt35": true,
-    "stmt36": true,
-    "stmt39": true,
-    "stmt40": true,
     "stmt5": true
   }
 }

parser/testdata/03443_projection_sparse/metadata.json

@@ -1,5 +1 @@
-{
-  "explain_todo": {
-    "stmt2": true
-  }
-}
+{}

parser/testdata/03464_projections_with_subcolumns/metadata.json

@@ -1,26 +1 @@
-{
-  "explain_todo": {
-    "stmt13": true,
-    "stmt14": true,
-    "stmt15": true,
-    "stmt24": true,
-    "stmt25": true,
-    "stmt26": true,
-    "stmt31": true,
-    "stmt33": true,
-    "stmt35": true,
-    "stmt37": true,
-    "stmt38": true,
-    "stmt39": true,
-    "stmt40": true,
-    "stmt41": true,
-    "stmt42": true,
-    "stmt43": true,
-    "stmt44": true,
-    "stmt45": true,
-    "stmt5": true,
-    "stmt52": true,
-    "stmt53": true,
-    "stmt54": true
-  }
-}
+{}

parser/testdata/03628_subcolumns_of_columns_with_dot_in_name/metadata.json

@@ -1,10 +1,8 @@
 {
   "explain_todo": {
-    "stmt10": true,
     "stmt11": true,
     "stmt15": true,
     "stmt20": true,
-    "stmt23": true,
     "stmt24": true,
     "stmt27": true,
     "stmt31": true