storage

README

Overview

This library contains a entity framework for bbolt, including CRUD (Create, Read, Update, Delete) and query operations, a filtering DSL (Domain Specific Language) as well as an AST (Abstract Syntax Tree) for the DSL

• zitiql contains the ANTLR4 based grammar for the filtering DSL
  • Use the ./generate.sh script to generate the go code when the grammar changes
• ast contains an AST which can be built from the grammar.
  • It is structured to be able to run filters across some set of data as well as interface for getting typing information about the symbols in the underlying datastore
  • It includes a visitor pattern which can be used for AST validations or transformations
  • It includes type transformation code, allowing the AST to be transformed into a typed version of itself
• boltz contains:
  • Entity management framework, including entity store interfaces and base types for doing CRUD and querying
  • Code for managing bbolt indexes and foreign keys
  • bbolt utilities for getting/setting typed data from bbolt (see typed_bucket.go)
  • Implementation of AST interfaces for reading symbols and getting symbol type information

ANTLR patches

ARM 32 Patch

A compile issue happens on arm 32 which required the following patch:

diff --git a/storage/zitiql/zitiql_parser.go b/storage/zitiql/zitiql_parser.go
index af80e9d..8732ec4 100644
--- a/storage/zitiql/zitiql_parser.go
+++ b/storage/zitiql/zitiql_parser.go
@@ -1170,7 +1170,7 @@ func (p *ZitiQlParser) Start() (localctx IStartContext) {
        p.GetErrorHandler().Sync(p)
        _la = p.GetTokenStream().LA(1)
 
-       for ((_la-3)&-(0x1f+1)) == 0 && ((1<<uint((_la-3)))&((1<<(ZitiQlParserLPAREN-3))|(1<<(ZitiQlParserBOOL-3))|(1<<(ZitiQlParserALL_OF-3))|(1<<(ZitiQlParserANY_OF-3))|(1<<(ZitiQlParserCOUNT-3))|(1<<(ZitiQlParserISEMPTY-3))|(1<<(ZitiQlParserNOT-3))|(1<<(ZitiQlParserIDENTIFIER-3)))) != 0 {
+       for ((_la-3)&-(0x1f+1)) == 0 && ((uint64(1)<<uint((_la-3)))&((1<<(ZitiQlParserLPAREN-3))|(1<<(ZitiQlParserBOOL-3))|(1<<(ZitiQlParserALL_OF-3))|(1<<(ZitiQlParserANY_OF-3))|(1<<(ZitiQlParserCOUNT-3))|(1<<(ZitiQlParserISEMPTY-3))|(1<<(ZitiQlParserNOT-3))|(1<<(ZitiQlParserIDENTIFIER-3)))) != 0 {
                {
                        p.SetState(141)
                        p.Query()

It may be a boundary condition and may be fixed if we add another constant, or it may not. Either way, the fix may need to be reapplied when the grammer is regenerated.