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Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type Context ¶
type Context struct {
HashKey string
SortKey string
NamedParams map[string]Empty
PositionalParams map[int]string
FixedParams map[string]interface{}
Substitutions map[string]string
// contains filtered or unexported fields
}
Context tracks expression state as DynamoDB request is built.
func (*Context) BuildPath ¶
func (c *Context) BuildPath(path *parser.DocumentPath) string
BuildPath applies substitutions for reserved keywords in a parser.DocumentPath and marshals it into string format.
func (*Context) IsKey ¶
IsKey returns true if the field is a hash key or sort key for the selected table/index.
func (*Context) NextGeneratedParam ¶
NextGeneratedParam returns the next generated parameter placeholder name. DynamoDB requires concrete values to be passed as expression values, so we simulate expression values by generating placeholders.
func (*Context) NextPositionalParam ¶
NextPositionalParam returns the next generated positional placeholder name. DynamoDB does not support positional parameters so we simulate it by generating named placeholders.
type FilterExpression ¶
type FilterExpression struct{}
type KeyExpression ¶
type KeyExpression struct{}
type NamedParams ¶
func (NamedParams) Clone ¶
func (p NamedParams) Clone() NamedParams
type PreparedQuery ¶
type PreparedQuery struct {
Query *dynamodb.QueryInput
Limit int
Columns []*parser.ProjectionColumn
NamedParams NamedParams
PositionalParams map[int]string
FixedParams map[string]interface{}
}
func PrepareQuery ¶
func PrepareQuery(ctx context.Context, tables *schema.TableLoader, query string) (*PreparedQuery, error)
func (*PreparedQuery) NewRequest ¶
func (pq *PreparedQuery) NewRequest(args []driver.NamedValue) (*dynamodb.QueryInput, error)
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