---

This section details on the original issue you should resolve

<issue_title>Parse failure of schema.table with INSERT/UPDATE</issue_title>
<issue_description>Similarly to #31, the INSERT/UPDATE query parsing errors when targeting schemaname.tablename references.

For example, the following executes successfully in SQLite3:

sqlite> CREATE TABLE main.tableau (n1, n2);
sqlite> INSERT INTO main.tableau VALUES (1, 2), (3, 4);
sqlite> UPDATE main.tableau SET n2=n1;
sqlite> DELETE FROM main.tableau WHERE n2 > 1;
sqlite> SELECT * FROM main.tableau;
+----+----+
| n1 | n2 |
+----+----+
| 1  | 1  |
+----+----+

However, the queries after the INSERT and UPDATE queries fail to parse with github.com/rqlite/sql: https://go.dev/play/p/LrTg9SXOODx

package main

import (
	"fmt"
	"strings"

	"github.com/rqlite/sql"
)

func main() {
	for _, q := range []string{
		`INSERT INTO main.tableau VALUES (1, 2), (3, 4);`,
		`UPDATE main.tableau SET n2=n1;`,
	} {
		p := sql.NewParser(strings.NewReader(q))
		s, err := p.ParseStatement()
		fmt.Printf("%q\n   err: %v\n  stmt: %#v\n", q, err, s)
	}
}

Output:

"INSERT INTO main.tableau VALUES (1, 2), (3, 4);"
   err: 1:17: expected VALUES, SELECT, or DEFAULT VALUES, found '.'
  stmt: &sql.InsertStatement{WithClause:(*sql.WithClause)(nil), Insert:sql.Pos{Offset:0, Line:1, Column:1}, Replace:sql.Pos{Offset:0, Line:0, Column:0}, InsertOr:sql.Pos{Offset:0, Line:0, Column:0}, InsertOrReplace:sql.Pos{Offset:0, Line:0, Column:0}, InsertOrRollback:sql.Pos{Offset:0, Line:0, Column:0}, InsertOrAbort:sql.Pos{Offset:0, Line:0, Column:0}, InsertOrFail:sql.Pos{Offset:0, Line:0, Column:0}, InsertOrIgnore:sql.Pos{Offset:0, Line:0, Column:0}, Into:sql.Pos{Offset:7, Line:1, Column:8}, Table:(*sql.Ident)(0xc0000b0180), As:sql.Pos{Offset:0, Line:0, Column:0}, Alias:(*sql.Ident)(nil), ColumnsLparen:sql.Pos{Offset:0, Line:0, Column:0}, Columns:[]*sql.Ident(nil), ColumnsRparen:sql.Pos{Offset:0, Line:0, Column:0}, Values:sql.Pos{Offset:0, Line:0, Column:0}, ValueLists:[]*sql.ExprList(nil), Select:(*sql.SelectStatement)(nil), Default:sql.Pos{Offset:0, Line:0, Column:0}, DefaultValues:sql.Pos{Offset:0, Line:0, Column:0}, UpsertClause:(*sql.UpsertClause)(nil), ReturningClause:(*sql.ReturningClause)(nil)}
"UPDATE main.tableau SET n2=n1;"
   err: 1:12: expected unqualified table name, found '.'
  stmt: &sql.UpdateStatement{WithClause:(*sql.WithClause)(nil), Update:sql.Pos{Offset:0, Line:1, Column:1}, UpdateOr:sql.Pos{Offset:0, Line:0, Column:0}, UpdateOrReplace:sql.Pos{Offset:0, Line:0, Column:0}, UpdateOrRollback:sql.Pos{Offset:0, Line:0, Column:0}, UpdateOrAbort:sql.Pos{Offset:0, Line:0, Column:0}, UpdateOrFail:sql.Pos{Offset:0, Line:0, Column:0}, UpdateOrIgnore:sql.Pos{Offset:0, Line:0, Column:0}, Table:(*sql.QualifiedTableName)(0xc0000f6000), Set:sql.Pos{Offset:0, Line:0, Column:0}, Assignments:[]*sql.Assignment(nil), Where:sql.Pos{Offset:0, Line:0, Column:0}, WhereExpr:sql.Expr(nil), ReturningClause:(*sql.ReturningClause)(nil)}

• INSERT gets parsed into a sql.InsertStatement which does not appear to be schema-aware. sql.CreateTableStatment has separate Schema and Name fields to identify the table, which InsertStatement could copy as they're using the same language constructs:

• UPDATE gets parsed into a sql.UpdateTableStatement which has a Table *sql.QualifiedTableName field, despite the "expected unqualified table name" error. This seems like a straightforward bug.

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