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SQL Builder panics on invalid SQL.

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Query execution panics on invalid destination.
This commit is contained in:
go-jet 2019-08-13 13:57:26 +02:00
parent 14c2c9d745
commit 486e45db5c
42 changed files with 357 additions and 713 deletions
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38
internal/jet/operators.go
View file

@ -1,7 +1,5 @@
package jet
import "errors"
const (
StringConcatOperator = "||"
)
@ -112,55 +110,33 @@ func (c *caseOperatorImpl) ELSE(els Expression) CaseOperator {
return c
}
func (c *caseOperatorImpl) serialize(statement StatementType, out *SqlBuilder, options ...SerializeOption) error {
if c == nil {
return errors.New("jet: Case Expression is nil. ")
}
func (c *caseOperatorImpl) serialize(statement StatementType, out *SqlBuilder, options ...SerializeOption) {
out.WriteString("(CASE")
if c.expression != nil {
err := c.expression.serialize(statement, out)
if err != nil {
return err
}
c.expression.serialize(statement, out)
}
if len(c.when) == 0 || len(c.then) == 0 {
return errors.New("jet: Invalid case Statement. There should be at least one when/then Expression pair. ")
panic("jet: invalid case Statement. There should be at least one WHEN/THEN pair. ")
}
if len(c.when) != len(c.then) {
return errors.New("jet: When and then Expression count mismatch. ")
panic("jet: WHEN and THEN expression count mismatch. ")
}
for i, when := range c.when {
out.WriteString("WHEN")
err := when.serialize(statement, out, noWrap)
if err != nil {
return err
}
when.serialize(statement, out, noWrap)
out.WriteString("THEN")
err = c.then[i].serialize(statement, out, noWrap)
if err != nil {
return err
}
c.then[i].serialize(statement, out, noWrap)
}
if c.els != nil {
out.WriteString("ELSE")
err := c.els.serialize(statement, out, noWrap)
if err != nil {
return err
}
c.els.serialize(statement, out, noWrap)
}
out.WriteString("END)")
return nil
}