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Simplify subquery parsing

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This commit is contained in:
Tobie Morgan Hitchcock 2018-03-18 20:01:41 +00:00
parent 3436634586
commit f77daca0da
1 changed files with 12 additions and 13 deletions
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25
sql/exprs.go
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@ -552,36 +552,35 @@ func (p *parser) parsePart() (exp Expr, err error) {
} }
func (p *parser) parseSubq() (sub *SubExpression, err error) { func (p *parser) parseSubq() (exp *SubExpression, err error) {
var exp Expr exp = &SubExpression{}
var tok Token
tok, _, _ = p.mightBe(SELECT, CREATE, UPDATE, DELETE, RELATE, INSERT, UPSERT) tok, _, _ := p.mightBe(SELECT, CREATE, UPDATE, DELETE, RELATE, INSERT, UPSERT)
switch tok { switch tok {
case SELECT: case SELECT:
exp, err = p.parseSelectStatement() exp.Expr, err = p.parseSelectStatement()
case CREATE: case CREATE:
p.buf.rw = true p.buf.rw = true
exp, err = p.parseCreateStatement() exp.Expr, err = p.parseCreateStatement()
case UPDATE: case UPDATE:
p.buf.rw = true p.buf.rw = true
exp, err = p.parseUpdateStatement() exp.Expr, err = p.parseUpdateStatement()
case DELETE: case DELETE:
p.buf.rw = true p.buf.rw = true
exp, err = p.parseDeleteStatement() exp.Expr, err = p.parseDeleteStatement()
case RELATE: case RELATE:
p.buf.rw = true p.buf.rw = true
exp, err = p.parseRelateStatement() exp.Expr, err = p.parseRelateStatement()
case INSERT: case INSERT:
p.buf.rw = true p.buf.rw = true
exp, err = p.parseInsertStatement() exp.Expr, err = p.parseInsertStatement()
case UPSERT: case UPSERT:
p.buf.rw = true p.buf.rw = true
exp, err = p.parseUpsertStatement() exp.Expr, err = p.parseUpsertStatement()
default: default:
exp, err = p.parseExpr() exp.Expr, err = p.parseExpr()
} }
if err != nil { if err != nil {
@ -590,7 +589,7 @@ func (p *parser) parseSubq() (sub *SubExpression, err error) {
_, _, err = p.shouldBe(RPAREN) _, _, err = p.shouldBe(RPAREN)
return &SubExpression{Expr: exp}, err return
} }