70 lines
1.5 KiB
Go
70 lines
1.5 KiB
Go
package sql
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import "fmt"
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func (p *Parser) parseInsert() (*InsertStatement, error) {
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if !p.expectSequence(INTO, IDENT) {
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return nil, p.unexpectedToken(INTO)
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}
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res := InsertStatement{}
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_, _, res.Table = p.rescan()
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if !p.expectNext(LPAREN) {
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return nil, p.unexpectedToken(LPAREN)
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}
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fieldNames := make([]string, 0)
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for loop := true; loop; {
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_, tok, val := p.scan()
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switch tok {
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case IDENT:
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fieldNames = append(fieldNames, val)
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case RPAREN:
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loop = false
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case COMMA:
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continue
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default:
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return nil, p.unexpectedToken(IDENT, RPAREN, COMMA)
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}
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}
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if !p.expectSequence(VALUES, LPAREN) {
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return nil, p.unexpectedToken()
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}
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values := make([]any, 0, len(fieldNames))
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for loop := true; loop; {
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_, tok, val := p.scan()
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switch tok {
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case IDENT:
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// TODO, convert to actual datatype?
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values = append(values, val)
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case COMMA, QUOTE, SINGLE_QUOTE, BACKQUOTE:
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continue
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case RPAREN:
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loop = false
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default:
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return nil, p.unexpectedToken(IDENT, RPAREN, COMMA)
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}
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}
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if len(values) != len(fieldNames) {
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return nil, fmt.Errorf("Expected same amount of Values as Fields, but got %v fields, and %v values", fieldNames, values)
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}
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// Handle things like RETURNING *, also handle multiple Values
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if !p.consumeUntilOne(50, SEMI, EOF) {
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return nil, fmt.Errorf("Expected semicolon but never found after 50 tries")
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}
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res.Values = make(map[string]any)
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for i, name := range fieldNames {
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res.Values[name] = values[i]
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}
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return &res, nil
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}
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