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Generic dialect support. (MySQL and Postgres)

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This commit is contained in:
go-jet 2019-07-28 14:57:02 +02:00
parent 043a0dc4c0
commit 5dda5e1e11
27 changed files with 440 additions and 92 deletions
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39
expression.go
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@ -7,6 +7,12 @@ import (
// Expression is common interface for all expressions.
// Can be Bool, Int, Float, String, Date, Time, Timez, Timestamp or Timestampz expressions.
type Expression interface {
acceptsVisitor
expression
}
type expression interface {
clause
projection
groupByClause
@ -95,7 +101,12 @@ func newBinaryExpression(lhs, rhs Expression, operator string) binaryOpExpressio
return binaryExpression
}
func (c *binaryOpExpression) serialize(statement statementType, out *sqlBuilder, options ...serializeOption) error {
func (c *binaryOpExpression) accept(visitor visitor) {
c.lhs.accept(visitor)
c.rhs.accept(visitor)
}
func (c *binaryOpExpression) serialize(statement statementType, out *sqlBuilder, options ...serializeOption) (err error) {
if c == nil {
return errors.New("jet: binary Expression is nil")
}
@ -112,21 +123,25 @@ func (c *binaryOpExpression) serialize(statement statementType, out *sqlBuilder,
out.writeString("(")
}
if err := c.lhs.serialize(statement, out); err != nil {
return err
}
if dialectOveride := out.dialect.serializeOverride(c.operator); dialectOveride != nil {
err = dialectOveride(c.lhs, c.rhs)(statement, out, options...)
} else {
if err := c.lhs.serialize(statement, out); err != nil {
return err
}
out.writeString(c.operator)
out.writeString(c.operator)
if err := c.rhs.serialize(statement, out); err != nil {
return err
if err := c.rhs.serialize(statement, out); err != nil {
return err
}
}
if wrap {
out.writeString(")")
}
return nil
return err
}
// A prefix operator Expression
@ -144,6 +159,10 @@ func newPrefixExpression(expression Expression, operator string) prefixOpExpress
return prefixExpression
}
func (p *prefixOpExpression) accept(visitor visitor) {
p.expression.accept(visitor)
}
func (p *prefixOpExpression) serialize(statement statementType, out *sqlBuilder, options ...serializeOption) error {
if p == nil {
return errors.New("jet: Prefix Expression is nil")
@ -176,6 +195,10 @@ func newPostfixOpExpression(expression Expression, operator string) postfixOpExp
return postfixOpExpression
}
func (p *postfixOpExpression) accept(visitor visitor) {
p.expression.accept(visitor)
}
func (p *postfixOpExpression) serialize(statement statementType, out *sqlBuilder, options ...serializeOption) error {
if p == nil {
return errors.New("jet: Postifx operator Expression is nil")