Add EXPLAIN QUERY TREE support for ClickHouse query tree explain statements (#102)

Author: kyleconroy

ast/ast.go

@@ -702,6 +702,7 @@ const (
 	ExplainPlan               ExplainType = "PLAN"
 	ExplainPipeline           ExplainType = "PIPELINE"
 	ExplainEstimate           ExplainType = "ESTIMATE"
+	ExplainQueryTree          ExplainType = "QUERY TREE"
 	ExplainCurrentTransaction ExplainType = "CURRENT TRANSACTION"
 )
 

parser/parser.go

@@ -3685,6 +3685,14 @@ func (p *Parser) parseExplain() *ast.ExplainQuery {
 			explain.ExplainType = ast.ExplainEstimate
 			explain.ExplicitType = true
 			p.nextToken()
+		case "QUERY":
+			// EXPLAIN QUERY TREE
+			p.nextToken()
+			if p.currentIs(token.IDENT) && strings.ToUpper(p.current.Value) == "TREE" {
+				p.nextToken()
+			}
+			explain.ExplainType = ast.ExplainQueryTree
+			explain.ExplicitType = true
 		case "CURRENT":
 			// EXPLAIN CURRENT TRANSACTION
 			p.nextToken()

parser/testdata/02932_analyzer_rewrite_sum_column_and_constant/metadata.json

@@ -1,92 +1 @@
-{
-  "explain_todo": {
-    "stmt101": true,
-    "stmt102": true,
-    "stmt103": true,
-    "stmt104": true,
-    "stmt105": true,
-    "stmt106": true,
-    "stmt107": true,
-    "stmt108": true,
-    "stmt117": true,
-    "stmt118": true,
-    "stmt119": true,
-    "stmt12": true,
-    "stmt120": true,
-    "stmt121": true,
-    "stmt122": true,
-    "stmt123": true,
-    "stmt124": true,
-    "stmt13": true,
-    "stmt134": true,
-    "stmt135": true,
-    "stmt136": true,
-    "stmt137": true,
-    "stmt138": true,
-    "stmt139": true,
-    "stmt140": true,
-    "stmt141": true,
-    "stmt142": true,
-    "stmt143": true,
-    "stmt154": true,
-    "stmt155": true,
-    "stmt156": true,
-    "stmt157": true,
-    "stmt158": true,
-    "stmt159": true,
-    "stmt160": true,
-    "stmt161": true,
-    "stmt162": true,
-    "stmt163": true,
-    "stmt174": true,
-    "stmt175": true,
-    "stmt176": true,
-    "stmt177": true,
-    "stmt178": true,
-    "stmt179": true,
-    "stmt180": true,
-    "stmt181": true,
-    "stmt182": true,
-    "stmt183": true,
-    "stmt26": true,
-    "stmt27": true,
-    "stmt28": true,
-    "stmt29": true,
-    "stmt30": true,
-    "stmt36": true,
-    "stmt37": true,
-    "stmt38": true,
-    "stmt39": true,
-    "stmt40": true,
-    "stmt46": true,
-    "stmt47": true,
-    "stmt48": true,
-    "stmt49": true,
-    "stmt50": true,
-    "stmt56": true,
-    "stmt57": true,
-    "stmt58": true,
-    "stmt59": true,
-    "stmt6": true,
-    "stmt60": true,
-    "stmt69": true,
-    "stmt7": true,
-    "stmt70": true,
-    "stmt71": true,
-    "stmt72": true,
-    "stmt73": true,
-    "stmt74": true,
-    "stmt75": true,
-    "stmt76": true,
-    "stmt8": true,
-    "stmt85": true,
-    "stmt86": true,
-    "stmt87": true,
-    "stmt88": true,
-    "stmt89": true,
-    "stmt9": true,
-    "stmt90": true,
-    "stmt91": true,
-    "stmt92": true
-  }
-}
+{}