Merge pull request vitessio#6807 from GuptaManan100/mysql-show

Added support for SHOW TABLE STATUS queries.

go/vt/sqlparser/analyzer.go

@@ -94,6 +94,8 @@ func ASTToStatementType(stmt Statement) StatementType {
 		return StmtSRollback
 	case *Release:
 		return StmtRelease
+	case *ShowTableStatus:
+		return StmtShow
 	default:
 		return StmtUnknown
 	}

go/vt/sqlparser/ast.go

@@ -258,6 +258,12 @@ type (
 		ShowCollationFilterOpt Expr
 	}
 
+	// ShowTableStatus is a struct for SHOW TABLE STATUS queries.
+	ShowTableStatus struct {
+		DatabaseName string
+		Filter       *ShowFilter
+	}
+
 	// Use represents a use statement.
 	Use struct {
 		DBName TableIdent
@@ -333,6 +339,7 @@ func (*OtherAdmin) iStatement()        {}
 func (*Select) iSelectStatement()      {}
 func (*Union) iSelectStatement()       {}
 func (*ParenSelect) iSelectStatement() {}
+func (*ShowTableStatus) iStatement()   {}
 
 // ParenSelect can actually not be a top level statement,
 // but we have to allow it because it's a requirement
@@ -2056,3 +2063,13 @@ func (node AccessMode) Format(buf *TrackedBuffer) {
 		buf.WriteString(TxReadWrite)
 	}
 }
+
+// Format formats the node.
+func (node *ShowTableStatus) Format(buf *TrackedBuffer) {
+	buf.WriteString("show table status")
+	if node.DatabaseName != "" {
+		buf.WriteString(" from ")
+		buf.WriteString(node.DatabaseName)
+	}
+	buf.astPrintf(node, "%v", node.Filter)
+}

go/vt/sqlparser/ast_test.go

@@ -798,3 +798,10 @@ func TestDefaultStatus(t *testing.T) {
 		String(&Default{ColName: "status"}),
 		"default(`status`)")
 }
+
+func TestShowTableStatus(t *testing.T) {
+	query := "Show Table Status FROM customer"
+	tree, err := Parse(query)
+	require.NoError(t, err)
+	require.NotNil(t, tree)
+}

go/vt/sqlparser/parse_test.go

@@ -1330,8 +1330,18 @@ var (
 		input:  "show session status",
 		output: "show session status",
 	}, {
-		input:  "show table status",
-		output: "show table",
+		input: "show table status",
+	}, {
+		input: "show table status from dbname",
+	}, {
+		input:  "show table status in dbname",
+		output: "show table status from dbname",
+	}, {
+		input:  "show table status in dbname LIKE '%' ",
+		output: "show table status from dbname like '%'",
+	}, {
+		input:  "show table status from dbname Where col=42 ",
+		output: "show table status from dbname where col = 42",
 	}, {
 		input: "show tables",
 	}, {