feat: Phase 0 — pipeline integration, DDL parser, SQL executor
- Rewrote PLAN.md with 6-phase production roadmap - Added 15 DDL/txn lexer keywords (primary, key, foreign, references, etc.) - Added AST nodes: CreateTable, DropTable, AlterTable, BeginTxn, CommitTxn, RollbackTxn, ExplainStmt, ColumnDef - Completed INSERT parser: VALUES, column list, RETURNING, ON CONFLICT - Added CREATE TABLE/DROP TABLE/ALTER TABLE parsers with constraints (PK, FK, UNIQUE, NOT NULL, CHECK, DEFAULT) - Added UPDATE/DELETE RETURNING support - Added BEGIN, COMMIT, ROLLBACK, EXPLAIN parsers - New query/executor.nim: AST->IR lowering + plan execution against LSM-Tree - Wired server to executor pipeline (replaced regex-based KV INSERT) - All 216 existing tests pass
This commit is contained in:
+267
-12
@@ -36,6 +36,8 @@ proc match(p: var Parser, kind: TokenKind): bool =
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proc parseExpr(p: var Parser): Node
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proc parseSelect(p: var Parser): Node
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proc parseStatement*(p: var Parser): Node
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proc parseCreateType(p: var Parser): Node
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proc parsePrimary(p: var Parser): Node =
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let tok = p.peek()
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@@ -405,8 +407,50 @@ proc parseSelect(p: var Parser): Node =
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proc parseInsert(p: var Parser): Node =
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let tok = p.expect(tkInsert)
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discard p.match(tkInto) # optional INTO
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let target = p.expect(tkIdent).value
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result = Node(kind: nkInsert, insTarget: target, line: tok.line, col: tok.col)
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result.insFields = @[]
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result.insValues = @[]
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result.insReturning = @[]
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# Parse column list: (col1, col2, ...)
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if p.peek().kind == tkLParen:
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discard p.advance()
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result.insFields.add(p.parseExpr())
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while p.match(tkComma):
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result.insFields.add(p.parseExpr())
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discard p.expect(tkRParen)
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# Parse VALUES
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if p.match(tkValues):
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while true:
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var row: seq[Node] = @[]
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if p.peek().kind == tkLParen:
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discard p.advance()
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row.add(p.parseExpr())
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while p.match(tkComma):
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row.add(p.parseExpr())
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discard p.expect(tkRParen)
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else:
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row.add(p.parseExpr())
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result.insValues.add(Node(kind: nkArrayLit, arrayElems: row))
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if p.peek().kind != tkComma:
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break
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discard p.advance()
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# Parse ON CONFLICT
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if p.peek().kind == tkOn:
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discard p.advance()
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if p.peek().kind == tkIdent and p.peek().value.toLower() == "conflict":
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discard p.advance()
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result.insConflict = p.parseExpr()
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# Parse RETURNING
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if p.match(tkReturning):
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result.insReturning.add(p.parseExpr())
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while p.match(tkComma):
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result.insReturning.add(p.parseExpr())
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proc parseUpdate(p: var Parser): Node =
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let tok = p.expect(tkUpdate)
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@@ -429,6 +473,11 @@ proc parseUpdate(p: var Parser): Node =
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binRight: v))
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if p.match(tkWhere):
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result.updWhere = Node(kind: nkWhere, whereExpr: p.parseExpr())
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if p.match(tkReturning):
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result.updReturning = @[]
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result.updReturning.add(p.parseExpr())
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while p.match(tkComma):
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result.updReturning.add(p.parseExpr())
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proc parseDelete(p: var Parser): Node =
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let tok = p.expect(tkDelete)
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@@ -437,25 +486,25 @@ proc parseDelete(p: var Parser): Node =
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result = Node(kind: nkDelete, delTarget: target, line: tok.line, col: tok.col)
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if p.match(tkWhere):
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result.delWhere = Node(kind: nkWhere, whereExpr: p.parseExpr())
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if p.match(tkReturning):
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result.delReturning = @[]
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result.delReturning.add(p.parseExpr())
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while p.match(tkComma):
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result.delReturning.add(p.parseExpr())
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proc parseCreateType(p: var Parser): Node =
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let tok = p.expect(tkCreate)
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discard p.expect(tkType)
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let name = p.expect(tkIdent).value
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result = Node(kind: nkCreateType, ctName: name, line: tok.line, col: tok.col)
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# Parse bases (EXTENDING)
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result.ctBases = @[]
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if p.match(tkIdent): # "extending" keyword mapped to ident
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# Check if the ident is "extending"
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# For now, just accept bases in braces
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if p.match(tkIdent):
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discard
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# Parse body
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if p.match(tkLBrace):
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result.ctProperties = @[]
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result.ctLinks = @[]
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while p.peek().kind != tkRbrace and p.peek().kind != tkEof:
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discard p.match(tkComma) # optional comma separator
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# Parse property or link
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discard p.match(tkComma)
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var isRequired = false
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var isMulti = false
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if p.peek().kind == tkRequired:
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@@ -464,11 +513,9 @@ proc parseCreateType(p: var Parser): Node =
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if p.peek().kind == tkMulti:
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discard p.advance()
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isMulti = true
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let fieldTok = p.expect(tkIdent)
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# Check for link or property
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if p.peek().kind == tkArrow: # -> means link
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discard p.advance() # consume ->
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if p.peek().kind == tkArrow:
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discard p.advance()
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let target = p.expect(tkIdent).value
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result.ctLinks.add(Node(kind: nkLinkDef,
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ldName: fieldTok.value, ldTarget: target,
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@@ -484,13 +531,221 @@ proc parseCreateType(p: var Parser): Node =
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discard p.match(tkSemicolon)
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discard p.expect(tkRbrace)
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proc parseCreateTable(p: var Parser): Node =
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let tok = p.expect(tkCreate)
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result = Node(kind: nkCreateTable, line: tok.line, col: tok.col)
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result.crtColumns = @[]
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result.crtConstraints = @[]
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# Optional IF NOT EXISTS
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if p.peek().kind == tkIf:
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discard p.advance()
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discard p.expect(tkNot)
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discard p.expect(tkExists)
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result.crtIfNotExists = true
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discard p.expect(tkTable)
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if p.peek().kind == tkIdent and p.peek().value.toLower() == "if":
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discard p.advance() # if
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discard p.expect(tkNot)
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discard p.expect(tkExists)
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result.crtIfNotExists = true
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result.crtName = p.expect(tkIdent).value
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discard p.expect(tkLParen)
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while p.peek().kind != tkRParen and p.peek().kind != tkEof:
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discard p.match(tkComma)
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# Check if this is a table-level constraint
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if p.peek().kind in {tkPrimary, tkForeign, tkUnique, tkCheck}:
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let cst = Node(kind: nkConstraintDef)
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cst.cstColumns = @[]; cst.cstRefColumns = @[]
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if p.match(tkPrimary):
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discard p.expect(tkKey)
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cst.cstType = "pkey"
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if p.peek().kind == tkLParen:
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discard p.advance()
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cst.cstColumns.add(p.expect(tkIdent).value)
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while p.match(tkComma):
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cst.cstColumns.add(p.expect(tkIdent).value)
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discard p.expect(tkRParen)
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elif p.match(tkForeign):
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discard p.expect(tkKey)
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cst.cstType = "fkey"
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if p.peek().kind == tkLParen:
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discard p.advance()
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cst.cstColumns.add(p.expect(tkIdent).value)
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while p.match(tkComma):
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cst.cstColumns.add(p.expect(tkIdent).value)
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discard p.expect(tkRParen)
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discard p.expect(tkReferences)
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cst.cstRefTable = p.expect(tkIdent).value
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if p.peek().kind == tkLParen:
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discard p.advance()
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cst.cstRefColumns.add(p.expect(tkIdent).value)
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while p.match(tkComma):
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cst.cstRefColumns.add(p.expect(tkIdent).value)
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discard p.expect(tkRParen)
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if p.peek().kind == tkOn:
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discard p.advance()
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if p.peek().kind == tkDelete:
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discard p.advance()
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if p.peek().kind == tkCascade:
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discard p.advance()
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cst.cstOnDelete = "CASCADE"
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elif p.peek().kind == tkSet:
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discard p.advance()
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discard p.match(tkNull)
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cst.cstOnDelete = "SET NULL"
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elif p.match(tkUnique):
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cst.cstType = "unique"
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if p.peek().kind == tkLParen:
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discard p.advance()
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cst.cstColumns.add(p.expect(tkIdent).value)
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while p.match(tkComma):
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cst.cstColumns.add(p.expect(tkIdent).value)
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discard p.expect(tkRParen)
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elif p.match(tkCheck):
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cst.cstType = "check"
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discard p.expect(tkLParen)
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cst.cstCheck = p.parseExpr()
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discard p.expect(tkRParen)
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result.crtConstraints.add(cst)
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continue
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# Parse column definition
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let colName = p.expect(tkIdent).value
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var colType = ""
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if p.peek().kind == tkIdent:
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colType = p.advance().value.toUpper()
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if p.peek().kind == tkLParen:
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discard p.advance()
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let size = p.expect(tkIntLit).value
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colType &= "(" & size & ")"
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discard p.expect(tkRParen)
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let colDef = Node(kind: nkColumnDef, cdName: colName, cdType: colType)
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colDef.cdConstraints = @[]
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# Parse column constraints
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while p.peek().kind in {tkPrimary, tkNot, tkNull, tkUnique, tkCheck, tkDefault, tkReferences}:
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let cst = Node(kind: nkConstraintDef)
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cst.cstColumns = @[colName]; cst.cstRefColumns = @[]
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if p.match(tkPrimary):
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discard p.expect(tkKey)
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cst.cstType = "pkey"
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elif p.match(tkNot):
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discard p.expect(tkNull)
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cst.cstType = "notnull"
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elif p.match(tkNull):
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cst.cstType = "null"
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elif p.match(tkUnique):
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cst.cstType = "unique"
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elif p.match(tkCheck):
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cst.cstType = "check"
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discard p.expect(tkLParen)
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cst.cstCheck = p.parseExpr()
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discard p.expect(tkRParen)
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elif p.match(tkDefault):
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cst.cstType = "default"
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cst.cstDefault = p.parseExpr()
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elif p.match(tkReferences):
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cst.cstType = "fkey"
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cst.cstRefTable = p.expect(tkIdent).value
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if p.peek().kind == tkLParen:
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discard p.advance()
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cst.cstRefColumns.add(p.expect(tkIdent).value)
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while p.match(tkComma):
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cst.cstRefColumns.add(p.expect(tkIdent).value)
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discard p.expect(tkRParen)
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if p.peek().kind == tkOn:
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discard p.advance()
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if p.peek().kind == tkDelete:
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discard p.advance()
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if p.peek().kind == tkCascade:
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discard p.advance()
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cst.cstOnDelete = "CASCADE"
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colDef.cdConstraints.add(cst)
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result.crtColumns.add(colDef)
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discard p.expect(tkRParen)
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proc parseDropTable(p: var Parser): Node =
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let tok = p.expect(tkDrop)
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result = Node(kind: nkDropTable, line: tok.line, col: tok.col)
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if p.peek().kind == tkTable:
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discard p.advance()
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if p.peek().kind == tkIdent and p.peek().value.toLower() == "if":
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discard p.advance()
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discard p.expect(tkExists)
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result.drtIfExists = true
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result.drtName = p.expect(tkIdent).value
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proc parseAlterTable(p: var Parser): Node =
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let tok = p.expect(tkAlter)
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discard p.expect(tkTable)
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result = Node(kind: nkAlterTable, line: tok.line, col: tok.col)
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result.altName = p.expect(tkIdent).value
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result.altOps = @[]
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discard p.match(tkAdd) # or tkRename
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proc parseBeginTxn(p: var Parser): Node =
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let tok = p.expect(tkBegin)
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result = Node(kind: nkBeginTxn, line: tok.line, col: tok.col)
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discard p.match(tkIdent) # optional TRANSACTION / WORK
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result.btxnMode = ""
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proc parseCommitTxn(p: var Parser): Node =
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let tok = p.expect(tkCommit)
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result = Node(kind: nkCommitTxn, line: tok.line, col: tok.col)
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discard p.match(tkIdent) # optional TRANSACTION / WORK
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proc parseRollbackTxn(p: var Parser): Node =
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let tok = p.expect(tkRollback)
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result = Node(kind: nkRollbackTxn, line: tok.line, col: tok.col)
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discard p.match(tkIdent) # optional TRANSACTION / WORK
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proc parseExplain(p: var Parser): Node =
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let tok = p.expect(tkExplain)
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result = Node(kind: nkExplainStmt, line: tok.line, col: tok.col)
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if p.peek().kind == tkIdent and p.peek().value.toLower() == "analyze":
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discard p.advance()
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result.expAnalyze = true
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result.expStmt = p.parseStatement()
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proc parseStatement*(p: var Parser): Node =
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case p.peek().kind
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of tkWith, tkSelect: p.parseSelect()
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of tkInsert: p.parseInsert()
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of tkUpdate: p.parseUpdate()
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of tkDelete: p.parseDelete()
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of tkCreate: p.parseCreateType()
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of tkCreate:
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if p.pos + 1 < p.tokens.len:
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let next = p.tokens[p.pos + 1]
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if next.kind == tkTable or
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(next.kind == tkIdent and next.value.toLower() == "if"):
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p.parseCreateTable()
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else:
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p.parseCreateType()
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else:
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p.parseCreateType()
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of tkDrop:
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if p.pos + 1 < p.tokens.len and p.tokens[p.pos + 1].kind == tkTable:
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p.parseDropTable()
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else:
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let tok = p.advance()
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Node(kind: nkNullLit, line: tok.line, col: tok.col)
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of tkAlter:
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if p.pos + 1 < p.tokens.len and p.tokens[p.pos + 1].kind == tkTable:
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p.parseAlterTable()
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else:
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let tok = p.advance()
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Node(kind: nkNullLit, line: tok.line, col: tok.col)
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of tkBegin: p.parseBeginTxn()
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of tkCommit: p.parseCommitTxn()
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of tkRollback: p.parseRollbackTxn()
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of tkExplain: p.parseExplain()
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else:
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let tok = p.advance()
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Node(kind: nkNullLit, line: tok.line, col: tok.col)
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