Method parseDescribeStatement

pkg/sql/parser/mysql.go:149–191

parseDescribeStatement parses DESCRIBE/DESC/EXPLAIN table_name

()

// parseDescribeStatement parses DESCRIBE/DESC/EXPLAIN table_name
func (p *Parser) parseDescribeStatement() (ast.Statement, error) {
	// For EXPLAIN SELECT ..., defer to parseStatement for the SELECT
	// For DESCRIBE table_name, just parse the table name
	if p.isType(models.TokenTypeSelect) {
		// EXPLAIN SELECT ... - treat as describe with the query text
		// For now, just skip to parse the select
		p.advance()
		stmt, err := p.parseSelectWithSetOperations()
		if err != nil {
			return nil, err
		}
		// Wrap in a describe
		_ = stmt
		desc := ast.GetDescribeStatement()
		desc.TableName = "SELECT"
		return desc, nil
	}

	// Snowflake: DESCRIBE TABLE <name>, DESCRIBE VIEW <name>, DESCRIBE STAGE
	// <name>, etc. Also MySQL's DESCRIBE <db>.<table>. Accept and consume a
	// leading object-kind keyword (TABLE, VIEW, DATABASE, SCHEMA) before the
	// name so we don't fail on "DESCRIBE TABLE users".
	if p.isType(models.TokenTypeTable) || p.isType(models.TokenTypeView) ||
		p.isType(models.TokenTypeDatabase) ||
		strings.EqualFold(p.currentToken.Token.Value, "SCHEMA") ||
		strings.EqualFold(p.currentToken.Token.Value, "STAGE") ||
		strings.EqualFold(p.currentToken.Token.Value, "STREAM") ||
		strings.EqualFold(p.currentToken.Token.Value, "TASK") ||
		strings.EqualFold(p.currentToken.Token.Value, "PIPE") ||
		strings.EqualFold(p.currentToken.Token.Value, "FUNCTION") ||
		strings.EqualFold(p.currentToken.Token.Value, "PROCEDURE") ||
		strings.EqualFold(p.currentToken.Token.Value, "WAREHOUSE") {
		p.advance()
	}

	name, err := p.parseQualifiedName()
	if err != nil {
		return nil, p.expectedError("table name")
	}
	desc := ast.GetDescribeStatement()
	desc.TableName = name
	return desc, nil
}

// parseReplaceStatement parses MySQL REPLACE INTO statement
func (p *Parser) parseReplaceStatement() (ast.Statement, error) {