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:
@@ -2,7 +2,6 @@
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import std/asyncdispatch
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import std/asyncnet
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import std/strutils
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import std/re
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import std/os
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import std/endians
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import config
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@@ -10,6 +9,7 @@ import ../protocol/wire
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import ../query/lexer
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import ../query/parser
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import ../query/ast
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import ../query/executor
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import ../storage/lsm
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type
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@@ -17,6 +17,7 @@ type
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config: BaraConfig
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running: bool
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db: LSMTree
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ctx: ExecutionContext
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ClientConnection = ref object
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socket: AsyncSocket
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@@ -24,7 +25,8 @@ type
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proc newServer*(config: BaraConfig): Server =
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let dataDir = config.dataDir / "server"
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Server(config: config, running: false, db: newLSMTree(dataDir))
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let db = newLSMTree(dataDir)
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Server(config: config, running: false, db: db, ctx: newExecutionContext(db))
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# ----------------------------------------------------------------------
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# Wire Protocol Helpers
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@@ -51,85 +53,10 @@ proc parseHeader(data: string): (bool, MessageHeader) =
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return (true, MessageHeader(kind: kind, length: length, requestId: requestId))
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# ----------------------------------------------------------------------
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# Query Execution
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# Query Execution (pipeline-based)
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# ----------------------------------------------------------------------
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proc extractStringLiteral(node: Node): string =
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if node == nil:
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return ""
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case node.kind
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of nkStringLit: return node.strVal
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of nkIdent: return node.identName
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of nkIntLit: return $node.intVal
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of nkBinOp:
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if node.binOp == bkEq and node.binLeft != nil and node.binRight != nil:
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# Accept any identifier on the left side (e.g., key = 'x', name = 'y')
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if node.binLeft.kind == nkIdent:
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return extractStringLiteral(node.binRight)
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if node.binRight.kind == nkIdent:
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return extractStringLiteral(node.binLeft)
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return ""
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else: return ""
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proc execSelect(db: LSMTree, astNode: Node): QueryResult =
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result = QueryResult(columns: @["key", "value"], rows: @[])
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var keyFilter = ""
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if astNode.selWhere != nil and astNode.selWhere.whereExpr != nil:
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let whereExpr = astNode.selWhere.whereExpr
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keyFilter = extractStringLiteral(whereExpr)
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if keyFilter != "":
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# Point read
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let (found, val) = db.get(keyFilter)
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if found:
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var row: seq[WireValue] = @[]
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row.add(WireValue(kind: fkString, strVal: keyFilter))
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row.add(WireValue(kind: fkBytes, bytesVal: val))
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result.rows.add(row)
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result.rowCount = 1
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else:
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# Full scan of memory tables
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for entry in db.scanMemTable():
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if entry.deleted:
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continue
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var row: seq[WireValue] = @[]
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row.add(WireValue(kind: fkString, strVal: entry.key))
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row.add(WireValue(kind: fkBytes, bytesVal: entry.value))
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result.rows.add(row)
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result.rowCount = result.rows.len
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proc execInsert(db: LSMTree, query: string): QueryResult =
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result = QueryResult()
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# Manual parsing for simple INSERT: INSERT table { field := 'value' }
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# We use the value as the key for simple KV semantics
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let pattern = re"INSERT\s+(\w+)\s*\{\s*(\w+)\s*:=\s*'([^']+)'\s*\}"
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var matches: array[3, string]
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if query.match(pattern, matches):
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let key = matches[2] # use the value as key
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let value = matches[2]
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db.put(key, cast[seq[byte]](value))
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result.affectedRows = 1
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else:
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# Try simpler pattern: INSERT table { field := value }
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let pattern2 = re"INSERT\s+(\w+)\s*\{\s*(\w+)\s*:=\s*(\w+)\s*\}"
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var matches2: array[3, string]
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if query.match(pattern2, matches2):
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let key = matches2[2]
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let value = matches2[2]
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db.put(key, cast[seq[byte]](value))
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result.affectedRows = 1
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proc execDelete(db: LSMTree, astNode: Node): QueryResult =
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result = QueryResult()
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var keyFilter = ""
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if astNode.delWhere != nil and astNode.delWhere.whereExpr != nil:
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keyFilter = extractStringLiteral(astNode.delWhere.whereExpr)
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if keyFilter != "":
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db.delete(keyFilter)
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result.affectedRows = 1
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proc executeQuery(db: LSMTree, query: string): (bool, QueryResult, string) =
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proc executeQuery(db: LSMTree, ctx: ExecutionContext, query: string): (bool, QueryResult, string) =
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try:
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let tokens = tokenize(query)
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let astNode = parse(tokens)
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@@ -139,15 +66,17 @@ proc executeQuery(db: LSMTree, query: string): (bool, QueryResult, string) =
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let stmt = astNode.stmts[0]
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case stmt.kind
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of nkSelect:
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let qr = execSelect(db, stmt)
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return (true, qr, "")
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of nkInsert:
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let qr = execInsert(db, query)
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return (true, qr, "")
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of nkDelete:
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let qr = execDelete(db, stmt)
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return (true, qr, "")
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of nkSelect, nkInsert, nkUpdate, nkDelete, nkCreateTable, nkDropTable,
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nkCreateType, nkBeginTxn, nkCommitTxn, nkRollbackTxn, nkExplainStmt:
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let (success, errMsg, affectedRows) = executor.executeQuery(ctx, astNode)
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if success:
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var qr = QueryResult(affectedRows: affectedRows, rowCount: affectedRows)
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if stmt.kind == nkSelect:
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qr.columns = @["key", "value"]
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qr.rows = @[]
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return (true, qr, "")
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else:
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return (false, QueryResult(), errMsg)
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else:
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return (false, QueryResult(), "Unsupported statement type: " & $stmt.kind)
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except Exception as e:
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@@ -237,7 +166,7 @@ proc handleClient(server: Server, client: AsyncSocket, clientId: int) {.async.}
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let queryStr = readString(cast[seq[byte]](payload), pos)
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echo "[", clientId, "] Query: ", queryStr
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let (success, result, errorMsg) = executeQuery(server.db, queryStr)
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let (success, result, errorMsg) = executeQuery(server.db, server.ctx, queryStr)
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if success:
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if result.rows.len > 0:
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let dataMsg = serializeResult(result, header.requestId)
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@@ -11,8 +11,15 @@ type
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nkCreateType
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nkDropType
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nkAlterType
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nkCreateTable
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nkDropTable
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nkAlterTable
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nkCreateIndex
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nkDropIndex
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nkBeginTxn
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nkCommitTxn
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nkRollbackTxn
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nkExplainStmt
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# Clauses
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nkFrom
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@@ -63,10 +70,11 @@ type
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# Join
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nkJoin
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# Type definitions
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# Type definitions / DDL
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nkPropertyDef
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nkLinkDef
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nkIndexDef
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nkColumnDef
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nkConstraintDef
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# Top-level
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@@ -157,6 +165,41 @@ type
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of nkAlterType:
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atName*: string
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atOps*: seq[Node]
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of nkCreateTable:
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crtName*: string
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crtColumns*: seq[Node]
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crtConstraints*: seq[Node]
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crtIfNotExists*: bool
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of nkDropTable:
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drtName*: string
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drtIfExists*: bool
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of nkAlterTable:
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altName*: string
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altOps*: seq[Node]
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of nkColumnDef:
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cdName*: string
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cdType*: string
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cdConstraints*: seq[Node]
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of nkConstraintDef:
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cstName*: string
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cstType*: string
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cstExpr*: Node
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cstColumns*: seq[string]
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cstRefTable*: string
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cstRefColumns*: seq[string]
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cstOnDelete*: string
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cstOnUpdate*: string
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cstCheck*: Node
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cstDefault*: Node
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of nkBeginTxn:
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btxnMode*: string
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of nkCommitTxn:
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ctxnChain*: bool
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of nkRollbackTxn:
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rtxnChain*: bool
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of nkExplainStmt:
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expStmt*: Node
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expAnalyze*: bool
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of nkCreateIndex:
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ciTarget*: string
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ciName*: string
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@@ -301,9 +344,6 @@ type
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idName*: string
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idExpr*: Node
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idKind*: IndexKind
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of nkConstraintDef:
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cdName*: string
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cdExpr*: Node
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of nkStatementList:
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stmts*: seq[Node]
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@@ -314,5 +354,9 @@ proc newNode*(kind: NodeKind, line, col: int = 0): Node =
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of nkInsert: result.insFields = @[]; result.insValues = @[]
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of nkUpdate: result.updSet = @[]
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of nkDelete: discard
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of nkCreateTable: result.crtColumns = @[]; result.crtConstraints = @[]
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of nkAlterTable: result.altOps = @[]
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of nkColumnDef: result.cdConstraints = @[]
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of nkConstraintDef: result.cstColumns = @[]; result.cstRefColumns = @[]
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of nkStatementList: result.stmts = @[]
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else: discard
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@@ -0,0 +1,398 @@
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## BaraQL Executor — AST lowering, IR compilation, and execution
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import std/strutils
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import std/tables
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import ast
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import ir
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import ../core/types
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import ../storage/lsm
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type
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ExecutionContext* = ref object
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db*: LSMTree
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tables*: Table[string, TableDef] # table name -> definition
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TableDef* = object
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name*: string
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columns*: seq[ColumnDef]
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pkColumns*: seq[string]
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ColumnDef* = object
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name*: string
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colType*: string
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isPk*: bool
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isNotNull*: bool
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isUnique*: bool
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defaultVal*: string
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Row = Table[string, string]
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proc newExecutionContext*(db: LSMTree): ExecutionContext =
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ExecutionContext(db: db, tables: initTable[string, TableDef]())
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proc execScan(ctx: ExecutionContext, table: string): seq[Row] =
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## Full table scan via LSM-Tree memtable scan.
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## Rows are stored as: "{table}.{key}" -> value
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## For simple KV: key is the PK value, value is the serialized row
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result = @[]
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let prefix = table & "."
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for entry in ctx.db.scanMemTable():
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if entry.deleted:
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continue
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if not entry.key.startsWith(prefix):
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continue
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let rest = entry.key[prefix.len..^1]
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var row: Table[string, string]
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row["$key"] = rest
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row["$value"] = cast[string](entry.value)
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result.add(row)
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proc execPointRead(ctx: ExecutionContext, table: string, key: string): seq[Row] =
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## Point read from LSM-Tree
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let fullKey = table & "." & key
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let (found, val) = ctx.db.get(fullKey)
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if found:
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var row: Table[string, string]
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row["$key"] = key
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row["$value"] = cast[string](val)
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return @[row]
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return @[]
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proc execInsert(ctx: ExecutionContext, table: string, fields: seq[string], values: seq[seq[string]]): int =
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## Insert rows into LSM-Tree.
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## Each row is stored as key=table.pk_value, value=<serialized row>
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var count = 0
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for rowVals in values:
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var key = ""
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var valStr = ""
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for i, f in fields:
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if i < rowVals.len:
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if key == "":
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key = f & "=" & rowVals[i]
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else:
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valStr &= f & "=" & rowVals[i]
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if i < rowVals.len - 1:
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valStr &= ","
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let fullKey = table & "." & key
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ctx.db.put(fullKey, cast[seq[byte]](valStr))
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inc count
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return count
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proc execDelete(ctx: ExecutionContext, table: string, key: string): int =
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let fullKey = table & "." & key
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let (found, _) = ctx.db.get(fullKey)
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if found:
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ctx.db.delete(fullKey)
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return 1
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return 0
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# ----------------------------------------------------------------------
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# AST → IR Lowering
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# ----------------------------------------------------------------------
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proc lowerExpr(node: Node): IRExpr =
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if node == nil:
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return nil
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case node.kind
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of nkIntLit:
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result = IRExpr(kind: irekLiteral)
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result.literal = IRLiteral(kind: vkInt64, int64Val: node.intVal)
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of nkFloatLit:
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result = IRExpr(kind: irekLiteral)
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result.literal = IRLiteral(kind: vkFloat64, float64Val: node.floatVal)
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of nkStringLit:
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result = IRExpr(kind: irekLiteral)
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result.literal = IRLiteral(kind: vkString, strVal: node.strVal)
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of nkBoolLit:
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result = IRExpr(kind: irekLiteral)
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result.literal = IRLiteral(kind: vkBool, boolVal: node.boolVal)
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of nkNullLit:
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result = IRExpr(kind: irekLiteral)
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result.literal = IRLiteral(kind: vkNull)
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of nkIdent:
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result = IRExpr(kind: irekField)
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result.fieldPath = @[node.identName]
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of nkPath:
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result = IRExpr(kind: irekField)
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result.fieldPath = node.pathParts
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of nkBinOp:
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result = IRExpr(kind: irekBinary)
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var irOp: IROperator
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case node.binOp
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of bkAdd: irOp = irAdd
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of bkSub: irOp = irSub
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of bkMul: irOp = irMul
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of bkDiv: irOp = irDiv
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of bkMod: irOp = irMod
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of bkEq: irOp = irEq
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of bkNotEq: irOp = irNeq
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of bkLt: irOp = irLt
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of bkLtEq: irOp = irLte
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of bkGt: irOp = irGt
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of bkGtEq: irOp = irGte
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of bkAnd: irOp = irAnd
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of bkOr: irOp = irOr
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else: irOp = irEq
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result.binOp = irOp
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result.binLeft = lowerExpr(node.binLeft)
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result.binRight = lowerExpr(node.binRight)
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of nkUnaryOp:
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result = IRExpr(kind: irekUnary)
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result.unOp = if node.unOp == ukNot: irNot else: irNot
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result.unExpr = lowerExpr(node.unOperand)
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of nkFuncCall:
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result = IRExpr(kind: irekAggregate)
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case node.funcName.toLower()
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of "count": result.aggOp = irCount
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of "sum": result.aggOp = irSum
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of "avg": result.aggOp = irAvg
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of "min": result.aggOp = irMin
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of "max": result.aggOp = irMax
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else: result = IRExpr(kind: irekLiteral, literal: IRLiteral(kind: vkNull))
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result.aggArgs = @[]
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for arg in node.funcArgs:
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result.aggArgs.add(lowerExpr(arg))
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of nkIsExpr:
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result = IRExpr(kind: irekUnary)
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result.unOp = if node.isNegated: irIsNotNull else: irIsNull
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result.unExpr = lowerExpr(node.isExpr)
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of nkLikeExpr:
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result = IRExpr(kind: irekBinary)
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result.binOp = if node.likeCaseInsensitive: irILike else: irLike
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result.binLeft = lowerExpr(node.likeExpr)
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result.binRight = lowerExpr(node.likePattern)
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of nkBetweenExpr:
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result = IRExpr(kind: irekBinary)
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result.binOp = irBetween
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result.binLeft = lowerExpr(node.betweenExpr)
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result.binRight = IRExpr(kind: irekLiteral, literal: IRLiteral(kind: vkString, strVal: ""))
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of nkInExpr:
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result = IRExpr(kind: irekBinary)
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result.binOp = irIn
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result.binLeft = lowerExpr(node.inLeft)
|
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result.binRight = lowerExpr(node.inRight)
|
||||
of nkExists:
|
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result = IRExpr(kind: irekExists)
|
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else:
|
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result = IRExpr(kind: irekLiteral, literal: IRLiteral(kind: vkNull))
|
||||
|
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proc lowerSelect(node: Node): IRPlan =
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result = IRPlan(kind: irpkScan)
|
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if node.selFrom != nil and node.selFrom.fromTable.len > 0:
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result.scanTable = node.selFrom.fromTable
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result.scanAlias = node.selFrom.fromAlias
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|
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# WHERE → Filter
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if node.selWhere != nil and node.selWhere.whereExpr != nil:
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let filterPlan = IRPlan(kind: irpkFilter)
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filterPlan.filterSource = result
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||||
filterPlan.filterCond = lowerExpr(node.selWhere.whereExpr)
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result = filterPlan
|
||||
|
||||
# GROUP BY
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if node.selGroupBy.len > 0:
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let groupPlan = IRPlan(kind: irpkGroupBy)
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groupPlan.groupSource = result
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||||
groupPlan.groupKeys = @[]
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for g in node.selGroupBy:
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||||
groupPlan.groupKeys.add(lowerExpr(g))
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||||
groupPlan.groupAggs = @[]
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if node.selHaving != nil:
|
||||
groupPlan.groupHaving = lowerExpr(node.selHaving.havingExpr)
|
||||
result = groupPlan
|
||||
|
||||
# SELECT → Project
|
||||
let projectPlan = IRPlan(kind: irpkProject)
|
||||
projectPlan.projectSource = result
|
||||
projectPlan.projectExprs = @[]
|
||||
projectPlan.projectAliases = @[]
|
||||
for e in node.selResult:
|
||||
projectPlan.projectExprs.add(lowerExpr(e))
|
||||
if e.kind == nkIdent:
|
||||
projectPlan.projectAliases.add(e.identName)
|
||||
else:
|
||||
projectPlan.projectAliases.add("")
|
||||
result = projectPlan
|
||||
|
||||
# ORDER BY → Sort
|
||||
if node.selOrderBy.len > 0:
|
||||
let sortPlan = IRPlan(kind: irpkSort)
|
||||
sortPlan.sortSource = result
|
||||
sortPlan.sortExprs = @[]
|
||||
sortPlan.sortDirs = @[]
|
||||
for o in node.selOrderBy:
|
||||
sortPlan.sortExprs.add(lowerExpr(o.orderByExpr))
|
||||
sortPlan.sortDirs.add(o.orderByDir == sdAsc)
|
||||
result = sortPlan
|
||||
|
||||
# LIMIT/OFFSET
|
||||
if node.selLimit != nil or node.selOffset != nil:
|
||||
let limitPlan = IRPlan(kind: irpkLimit)
|
||||
limitPlan.limitSource = result
|
||||
limitPlan.limitCount = if node.selLimit != nil and node.selLimit.limitExpr.kind == nkIntLit:
|
||||
node.selLimit.limitExpr.intVal else: 0
|
||||
limitPlan.limitOffset = if node.selOffset != nil and node.selOffset.offsetExpr.kind == nkIntLit:
|
||||
node.selOffset.offsetExpr.intVal else: 0
|
||||
result = limitPlan
|
||||
|
||||
proc lowerInsert(node: Node): IRPlan =
|
||||
result = IRPlan(kind: irpkInsert)
|
||||
result.insertTable = node.insTarget
|
||||
result.insertFields = @[]
|
||||
for f in node.insFields:
|
||||
if f.kind == nkIdent:
|
||||
result.insertFields.add(f.identName)
|
||||
else:
|
||||
result.insertFields.add("")
|
||||
result.insertValues = @[]
|
||||
for rowNode in node.insValues:
|
||||
var rowVals: seq[IRExpr] = @[]
|
||||
if rowNode.kind == nkArrayLit:
|
||||
for v in rowNode.arrayElems:
|
||||
rowVals.add(lowerExpr(v))
|
||||
else:
|
||||
rowVals.add(lowerExpr(rowNode))
|
||||
result.insertValues.add(rowVals)
|
||||
|
||||
# ----------------------------------------------------------------------
|
||||
# IR Plan Execution
|
||||
# ----------------------------------------------------------------------
|
||||
|
||||
proc executePlan(ctx: ExecutionContext, plan: IRPlan): seq[Row] =
|
||||
if plan == nil:
|
||||
return @[]
|
||||
|
||||
case plan.kind
|
||||
of irpkScan:
|
||||
result = execScan(ctx, plan.scanTable)
|
||||
|
||||
of irpkFilter:
|
||||
let sourceRows = executePlan(ctx, plan.filterSource)
|
||||
result = sourceRows # TODO: actual filter evaluation
|
||||
|
||||
of irpkProject:
|
||||
let sourceRows = executePlan(ctx, plan.projectSource)
|
||||
result = sourceRows
|
||||
|
||||
of irpkSort:
|
||||
let sourceRows = executePlan(ctx, plan.sortSource)
|
||||
result = sourceRows
|
||||
|
||||
of irpkLimit:
|
||||
let sourceRows = executePlan(ctx, plan.limitSource)
|
||||
var start = int(plan.limitOffset)
|
||||
if start > sourceRows.len: start = sourceRows.len
|
||||
var endIdx = start + int(plan.limitCount)
|
||||
if endIdx > sourceRows.len or plan.limitCount == 0:
|
||||
endIdx = sourceRows.len
|
||||
result = sourceRows[start..<endIdx]
|
||||
|
||||
of irpkGroupBy:
|
||||
result = executePlan(ctx, plan.groupSource)
|
||||
|
||||
of irpkJoin:
|
||||
result = executePlan(ctx, plan.joinLeft)
|
||||
|
||||
else:
|
||||
result = @[]
|
||||
|
||||
# ----------------------------------------------------------------------
|
||||
# High-level execute function
|
||||
# ----------------------------------------------------------------------
|
||||
|
||||
proc executeQuery*(ctx: ExecutionContext, astNode: Node): (bool, string, int) =
|
||||
## Execute a parsed AST statement against the execution context.
|
||||
## Returns (success, errorMessage, affectedRows)
|
||||
if astNode == nil or astNode.stmts.len == 0:
|
||||
return (true, "", 0)
|
||||
|
||||
let stmt = astNode.stmts[0]
|
||||
case stmt.kind
|
||||
of nkSelect:
|
||||
let plan = lowerSelect(stmt)
|
||||
let rows = executePlan(ctx, plan)
|
||||
return (true, "", rows.len)
|
||||
|
||||
of nkInsert:
|
||||
var fields: seq[string] = @[]
|
||||
for f in stmt.insFields:
|
||||
if f.kind == nkIdent:
|
||||
fields.add(f.identName)
|
||||
else:
|
||||
fields.add("")
|
||||
|
||||
var values: seq[seq[string]] = @[]
|
||||
for rowNode in stmt.insValues:
|
||||
var row: seq[string] = @[]
|
||||
if rowNode.kind == nkArrayLit:
|
||||
for v in rowNode.arrayElems:
|
||||
if v.kind == nkStringLit: row.add(v.strVal)
|
||||
elif v.kind == nkIntLit: row.add($v.intVal)
|
||||
elif v.kind == nkFloatLit: row.add($v.floatVal)
|
||||
elif v.kind == nkBoolLit: row.add($v.boolVal)
|
||||
elif v.kind == nkNullLit: row.add("NULL")
|
||||
else: row.add("")
|
||||
else:
|
||||
if rowNode.kind == nkStringLit: row.add(rowNode.strVal)
|
||||
elif rowNode.kind == nkIntLit: row.add($rowNode.intVal)
|
||||
else: row.add("")
|
||||
values.add(row)
|
||||
|
||||
let count = execInsert(ctx, stmt.insTarget, fields, values)
|
||||
return (true, "", count)
|
||||
|
||||
of nkUpdate:
|
||||
return (true, "", 0)
|
||||
|
||||
of nkDelete:
|
||||
var key = ""
|
||||
if stmt.delWhere != nil and stmt.delWhere.whereExpr != nil:
|
||||
# Extract simple WHERE key = 'value'
|
||||
let w = stmt.delWhere.whereExpr
|
||||
if w.kind == nkBinOp and w.binOp == bkEq:
|
||||
if w.binLeft.kind == nkIdent and w.binRight.kind == nkStringLit:
|
||||
key = w.binLeft.identName & "=" & w.binRight.strVal
|
||||
let count = execDelete(ctx, stmt.delTarget, key)
|
||||
return (true, "", count)
|
||||
|
||||
of nkCreateTable:
|
||||
var tbl = TableDef(name: stmt.crtName, columns: @[], pkColumns: @[])
|
||||
for col in stmt.crtColumns:
|
||||
if col.kind == nkColumnDef:
|
||||
var colDef = ColumnDef(name: col.cdName, colType: col.cdType)
|
||||
for cst in col.cdConstraints:
|
||||
if cst.kind == nkConstraintDef:
|
||||
case cst.cstType
|
||||
of "pkey":
|
||||
colDef.isPk = true
|
||||
tbl.pkColumns.add(col.cdName)
|
||||
of "notnull": colDef.isNotNull = true
|
||||
of "unique": colDef.isUnique = true
|
||||
of "default":
|
||||
if cst.cstDefault != nil and cst.cstDefault.kind == nkStringLit:
|
||||
colDef.defaultVal = cst.cstDefault.strVal
|
||||
else: discard
|
||||
tbl.columns.add(colDef)
|
||||
ctx.tables[stmt.crtName] = tbl
|
||||
return (true, "", 0)
|
||||
|
||||
of nkDropTable:
|
||||
ctx.tables.del(stmt.drtName)
|
||||
return (true, "", 0)
|
||||
|
||||
of nkBeginTxn:
|
||||
return (true, "", 0)
|
||||
|
||||
of nkCommitTxn:
|
||||
return (true, "", 0)
|
||||
|
||||
of nkRollbackTxn:
|
||||
return (true, "", 0)
|
||||
|
||||
of nkCreateType:
|
||||
return (true, "", 0)
|
||||
|
||||
of nkExplainStmt:
|
||||
return (true, "", 0)
|
||||
|
||||
else:
|
||||
return (false, "Unsupported statement type: " & $stmt.kind, 0)
|
||||
@@ -75,6 +75,21 @@ type
|
||||
tkLike
|
||||
tkILike
|
||||
tkReturning
|
||||
tkPrimary
|
||||
tkKey
|
||||
tkForeign
|
||||
tkReferences
|
||||
tkCascade
|
||||
tkUnique
|
||||
tkCheck
|
||||
tkDefault
|
||||
tkAdd
|
||||
tkColumn
|
||||
tkRename
|
||||
tkBegin
|
||||
tkCommit
|
||||
tkRollback
|
||||
tkExplain
|
||||
tkCount
|
||||
tkSum
|
||||
tkAvg
|
||||
@@ -203,6 +218,21 @@ const keywords*: Table[string, TokenKind] = {
|
||||
"like": tkLike,
|
||||
"ilike": tkILike,
|
||||
"returning": tkReturning,
|
||||
"primary": tkPrimary,
|
||||
"key": tkKey,
|
||||
"foreign": tkForeign,
|
||||
"references": tkReferences,
|
||||
"cascade": tkCascade,
|
||||
"unique": tkUnique,
|
||||
"check": tkCheck,
|
||||
"default": tkDefault,
|
||||
"add": tkAdd,
|
||||
"column": tkColumn,
|
||||
"rename": tkRename,
|
||||
"begin": tkBegin,
|
||||
"commit": tkCommit,
|
||||
"rollback": tkRollback,
|
||||
"explain": tkExplain,
|
||||
"count": tkCount,
|
||||
"sum": tkSum,
|
||||
"avg": tkAvg,
|
||||
|
||||
+267
-12
@@ -36,6 +36,8 @@ proc match(p: var Parser, kind: TokenKind): bool =
|
||||
|
||||
proc parseExpr(p: var Parser): Node
|
||||
proc parseSelect(p: var Parser): Node
|
||||
proc parseStatement*(p: var Parser): Node
|
||||
proc parseCreateType(p: var Parser): Node
|
||||
|
||||
proc parsePrimary(p: var Parser): Node =
|
||||
let tok = p.peek()
|
||||
@@ -405,8 +407,50 @@ proc parseSelect(p: var Parser): Node =
|
||||
|
||||
proc parseInsert(p: var Parser): Node =
|
||||
let tok = p.expect(tkInsert)
|
||||
discard p.match(tkInto) # optional INTO
|
||||
let target = p.expect(tkIdent).value
|
||||
result = Node(kind: nkInsert, insTarget: target, line: tok.line, col: tok.col)
|
||||
result.insFields = @[]
|
||||
result.insValues = @[]
|
||||
result.insReturning = @[]
|
||||
|
||||
# Parse column list: (col1, col2, ...)
|
||||
if p.peek().kind == tkLParen:
|
||||
discard p.advance()
|
||||
result.insFields.add(p.parseExpr())
|
||||
while p.match(tkComma):
|
||||
result.insFields.add(p.parseExpr())
|
||||
discard p.expect(tkRParen)
|
||||
|
||||
# Parse VALUES
|
||||
if p.match(tkValues):
|
||||
while true:
|
||||
var row: seq[Node] = @[]
|
||||
if p.peek().kind == tkLParen:
|
||||
discard p.advance()
|
||||
row.add(p.parseExpr())
|
||||
while p.match(tkComma):
|
||||
row.add(p.parseExpr())
|
||||
discard p.expect(tkRParen)
|
||||
else:
|
||||
row.add(p.parseExpr())
|
||||
result.insValues.add(Node(kind: nkArrayLit, arrayElems: row))
|
||||
if p.peek().kind != tkComma:
|
||||
break
|
||||
discard p.advance()
|
||||
|
||||
# Parse ON CONFLICT
|
||||
if p.peek().kind == tkOn:
|
||||
discard p.advance()
|
||||
if p.peek().kind == tkIdent and p.peek().value.toLower() == "conflict":
|
||||
discard p.advance()
|
||||
result.insConflict = p.parseExpr()
|
||||
|
||||
# Parse RETURNING
|
||||
if p.match(tkReturning):
|
||||
result.insReturning.add(p.parseExpr())
|
||||
while p.match(tkComma):
|
||||
result.insReturning.add(p.parseExpr())
|
||||
|
||||
proc parseUpdate(p: var Parser): Node =
|
||||
let tok = p.expect(tkUpdate)
|
||||
@@ -429,6 +473,11 @@ proc parseUpdate(p: var Parser): Node =
|
||||
binRight: v))
|
||||
if p.match(tkWhere):
|
||||
result.updWhere = Node(kind: nkWhere, whereExpr: p.parseExpr())
|
||||
if p.match(tkReturning):
|
||||
result.updReturning = @[]
|
||||
result.updReturning.add(p.parseExpr())
|
||||
while p.match(tkComma):
|
||||
result.updReturning.add(p.parseExpr())
|
||||
|
||||
proc parseDelete(p: var Parser): Node =
|
||||
let tok = p.expect(tkDelete)
|
||||
@@ -437,25 +486,25 @@ proc parseDelete(p: var Parser): Node =
|
||||
result = Node(kind: nkDelete, delTarget: target, line: tok.line, col: tok.col)
|
||||
if p.match(tkWhere):
|
||||
result.delWhere = Node(kind: nkWhere, whereExpr: p.parseExpr())
|
||||
if p.match(tkReturning):
|
||||
result.delReturning = @[]
|
||||
result.delReturning.add(p.parseExpr())
|
||||
while p.match(tkComma):
|
||||
result.delReturning.add(p.parseExpr())
|
||||
|
||||
proc parseCreateType(p: var Parser): Node =
|
||||
let tok = p.expect(tkCreate)
|
||||
discard p.expect(tkType)
|
||||
let name = p.expect(tkIdent).value
|
||||
result = Node(kind: nkCreateType, ctName: name, line: tok.line, col: tok.col)
|
||||
# Parse bases (EXTENDING)
|
||||
result.ctBases = @[]
|
||||
if p.match(tkIdent): # "extending" keyword mapped to ident
|
||||
# Check if the ident is "extending"
|
||||
# For now, just accept bases in braces
|
||||
if p.match(tkIdent):
|
||||
discard
|
||||
# Parse body
|
||||
if p.match(tkLBrace):
|
||||
result.ctProperties = @[]
|
||||
result.ctLinks = @[]
|
||||
while p.peek().kind != tkRbrace and p.peek().kind != tkEof:
|
||||
discard p.match(tkComma) # optional comma separator
|
||||
# Parse property or link
|
||||
discard p.match(tkComma)
|
||||
var isRequired = false
|
||||
var isMulti = false
|
||||
if p.peek().kind == tkRequired:
|
||||
@@ -464,11 +513,9 @@ proc parseCreateType(p: var Parser): Node =
|
||||
if p.peek().kind == tkMulti:
|
||||
discard p.advance()
|
||||
isMulti = true
|
||||
|
||||
let fieldTok = p.expect(tkIdent)
|
||||
# Check for link or property
|
||||
if p.peek().kind == tkArrow: # -> means link
|
||||
discard p.advance() # consume ->
|
||||
if p.peek().kind == tkArrow:
|
||||
discard p.advance()
|
||||
let target = p.expect(tkIdent).value
|
||||
result.ctLinks.add(Node(kind: nkLinkDef,
|
||||
ldName: fieldTok.value, ldTarget: target,
|
||||
@@ -484,13 +531,221 @@ proc parseCreateType(p: var Parser): Node =
|
||||
discard p.match(tkSemicolon)
|
||||
discard p.expect(tkRbrace)
|
||||
|
||||
proc parseCreateTable(p: var Parser): Node =
|
||||
let tok = p.expect(tkCreate)
|
||||
result = Node(kind: nkCreateTable, line: tok.line, col: tok.col)
|
||||
result.crtColumns = @[]
|
||||
result.crtConstraints = @[]
|
||||
|
||||
# Optional IF NOT EXISTS
|
||||
if p.peek().kind == tkIf:
|
||||
discard p.advance()
|
||||
discard p.expect(tkNot)
|
||||
discard p.expect(tkExists)
|
||||
result.crtIfNotExists = true
|
||||
|
||||
discard p.expect(tkTable)
|
||||
if p.peek().kind == tkIdent and p.peek().value.toLower() == "if":
|
||||
discard p.advance() # if
|
||||
discard p.expect(tkNot)
|
||||
discard p.expect(tkExists)
|
||||
result.crtIfNotExists = true
|
||||
|
||||
result.crtName = p.expect(tkIdent).value
|
||||
discard p.expect(tkLParen)
|
||||
|
||||
while p.peek().kind != tkRParen and p.peek().kind != tkEof:
|
||||
discard p.match(tkComma)
|
||||
|
||||
# Check if this is a table-level constraint
|
||||
if p.peek().kind in {tkPrimary, tkForeign, tkUnique, tkCheck}:
|
||||
let cst = Node(kind: nkConstraintDef)
|
||||
cst.cstColumns = @[]; cst.cstRefColumns = @[]
|
||||
if p.match(tkPrimary):
|
||||
discard p.expect(tkKey)
|
||||
cst.cstType = "pkey"
|
||||
if p.peek().kind == tkLParen:
|
||||
discard p.advance()
|
||||
cst.cstColumns.add(p.expect(tkIdent).value)
|
||||
while p.match(tkComma):
|
||||
cst.cstColumns.add(p.expect(tkIdent).value)
|
||||
discard p.expect(tkRParen)
|
||||
elif p.match(tkForeign):
|
||||
discard p.expect(tkKey)
|
||||
cst.cstType = "fkey"
|
||||
if p.peek().kind == tkLParen:
|
||||
discard p.advance()
|
||||
cst.cstColumns.add(p.expect(tkIdent).value)
|
||||
while p.match(tkComma):
|
||||
cst.cstColumns.add(p.expect(tkIdent).value)
|
||||
discard p.expect(tkRParen)
|
||||
discard p.expect(tkReferences)
|
||||
cst.cstRefTable = p.expect(tkIdent).value
|
||||
if p.peek().kind == tkLParen:
|
||||
discard p.advance()
|
||||
cst.cstRefColumns.add(p.expect(tkIdent).value)
|
||||
while p.match(tkComma):
|
||||
cst.cstRefColumns.add(p.expect(tkIdent).value)
|
||||
discard p.expect(tkRParen)
|
||||
if p.peek().kind == tkOn:
|
||||
discard p.advance()
|
||||
if p.peek().kind == tkDelete:
|
||||
discard p.advance()
|
||||
if p.peek().kind == tkCascade:
|
||||
discard p.advance()
|
||||
cst.cstOnDelete = "CASCADE"
|
||||
elif p.peek().kind == tkSet:
|
||||
discard p.advance()
|
||||
discard p.match(tkNull)
|
||||
cst.cstOnDelete = "SET NULL"
|
||||
elif p.match(tkUnique):
|
||||
cst.cstType = "unique"
|
||||
if p.peek().kind == tkLParen:
|
||||
discard p.advance()
|
||||
cst.cstColumns.add(p.expect(tkIdent).value)
|
||||
while p.match(tkComma):
|
||||
cst.cstColumns.add(p.expect(tkIdent).value)
|
||||
discard p.expect(tkRParen)
|
||||
elif p.match(tkCheck):
|
||||
cst.cstType = "check"
|
||||
discard p.expect(tkLParen)
|
||||
cst.cstCheck = p.parseExpr()
|
||||
discard p.expect(tkRParen)
|
||||
result.crtConstraints.add(cst)
|
||||
continue
|
||||
|
||||
# Parse column definition
|
||||
let colName = p.expect(tkIdent).value
|
||||
var colType = ""
|
||||
if p.peek().kind == tkIdent:
|
||||
colType = p.advance().value.toUpper()
|
||||
if p.peek().kind == tkLParen:
|
||||
discard p.advance()
|
||||
let size = p.expect(tkIntLit).value
|
||||
colType &= "(" & size & ")"
|
||||
discard p.expect(tkRParen)
|
||||
|
||||
let colDef = Node(kind: nkColumnDef, cdName: colName, cdType: colType)
|
||||
colDef.cdConstraints = @[]
|
||||
|
||||
# Parse column constraints
|
||||
while p.peek().kind in {tkPrimary, tkNot, tkNull, tkUnique, tkCheck, tkDefault, tkReferences}:
|
||||
let cst = Node(kind: nkConstraintDef)
|
||||
cst.cstColumns = @[colName]; cst.cstRefColumns = @[]
|
||||
if p.match(tkPrimary):
|
||||
discard p.expect(tkKey)
|
||||
cst.cstType = "pkey"
|
||||
elif p.match(tkNot):
|
||||
discard p.expect(tkNull)
|
||||
cst.cstType = "notnull"
|
||||
elif p.match(tkNull):
|
||||
cst.cstType = "null"
|
||||
elif p.match(tkUnique):
|
||||
cst.cstType = "unique"
|
||||
elif p.match(tkCheck):
|
||||
cst.cstType = "check"
|
||||
discard p.expect(tkLParen)
|
||||
cst.cstCheck = p.parseExpr()
|
||||
discard p.expect(tkRParen)
|
||||
elif p.match(tkDefault):
|
||||
cst.cstType = "default"
|
||||
cst.cstDefault = p.parseExpr()
|
||||
elif p.match(tkReferences):
|
||||
cst.cstType = "fkey"
|
||||
cst.cstRefTable = p.expect(tkIdent).value
|
||||
if p.peek().kind == tkLParen:
|
||||
discard p.advance()
|
||||
cst.cstRefColumns.add(p.expect(tkIdent).value)
|
||||
while p.match(tkComma):
|
||||
cst.cstRefColumns.add(p.expect(tkIdent).value)
|
||||
discard p.expect(tkRParen)
|
||||
if p.peek().kind == tkOn:
|
||||
discard p.advance()
|
||||
if p.peek().kind == tkDelete:
|
||||
discard p.advance()
|
||||
if p.peek().kind == tkCascade:
|
||||
discard p.advance()
|
||||
cst.cstOnDelete = "CASCADE"
|
||||
colDef.cdConstraints.add(cst)
|
||||
result.crtColumns.add(colDef)
|
||||
|
||||
discard p.expect(tkRParen)
|
||||
|
||||
proc parseDropTable(p: var Parser): Node =
|
||||
let tok = p.expect(tkDrop)
|
||||
result = Node(kind: nkDropTable, line: tok.line, col: tok.col)
|
||||
if p.peek().kind == tkTable:
|
||||
discard p.advance()
|
||||
if p.peek().kind == tkIdent and p.peek().value.toLower() == "if":
|
||||
discard p.advance()
|
||||
discard p.expect(tkExists)
|
||||
result.drtIfExists = true
|
||||
result.drtName = p.expect(tkIdent).value
|
||||
|
||||
proc parseAlterTable(p: var Parser): Node =
|
||||
let tok = p.expect(tkAlter)
|
||||
discard p.expect(tkTable)
|
||||
result = Node(kind: nkAlterTable, line: tok.line, col: tok.col)
|
||||
result.altName = p.expect(tkIdent).value
|
||||
result.altOps = @[]
|
||||
discard p.match(tkAdd) # or tkRename
|
||||
|
||||
proc parseBeginTxn(p: var Parser): Node =
|
||||
let tok = p.expect(tkBegin)
|
||||
result = Node(kind: nkBeginTxn, line: tok.line, col: tok.col)
|
||||
discard p.match(tkIdent) # optional TRANSACTION / WORK
|
||||
result.btxnMode = ""
|
||||
|
||||
proc parseCommitTxn(p: var Parser): Node =
|
||||
let tok = p.expect(tkCommit)
|
||||
result = Node(kind: nkCommitTxn, line: tok.line, col: tok.col)
|
||||
discard p.match(tkIdent) # optional TRANSACTION / WORK
|
||||
|
||||
proc parseRollbackTxn(p: var Parser): Node =
|
||||
let tok = p.expect(tkRollback)
|
||||
result = Node(kind: nkRollbackTxn, line: tok.line, col: tok.col)
|
||||
discard p.match(tkIdent) # optional TRANSACTION / WORK
|
||||
|
||||
proc parseExplain(p: var Parser): Node =
|
||||
let tok = p.expect(tkExplain)
|
||||
result = Node(kind: nkExplainStmt, line: tok.line, col: tok.col)
|
||||
if p.peek().kind == tkIdent and p.peek().value.toLower() == "analyze":
|
||||
discard p.advance()
|
||||
result.expAnalyze = true
|
||||
result.expStmt = p.parseStatement()
|
||||
|
||||
proc parseStatement*(p: var Parser): Node =
|
||||
case p.peek().kind
|
||||
of tkWith, tkSelect: p.parseSelect()
|
||||
of tkInsert: p.parseInsert()
|
||||
of tkUpdate: p.parseUpdate()
|
||||
of tkDelete: p.parseDelete()
|
||||
of tkCreate: p.parseCreateType()
|
||||
of tkCreate:
|
||||
if p.pos + 1 < p.tokens.len:
|
||||
let next = p.tokens[p.pos + 1]
|
||||
if next.kind == tkTable or
|
||||
(next.kind == tkIdent and next.value.toLower() == "if"):
|
||||
p.parseCreateTable()
|
||||
else:
|
||||
p.parseCreateType()
|
||||
else:
|
||||
p.parseCreateType()
|
||||
of tkDrop:
|
||||
if p.pos + 1 < p.tokens.len and p.tokens[p.pos + 1].kind == tkTable:
|
||||
p.parseDropTable()
|
||||
else:
|
||||
let tok = p.advance()
|
||||
Node(kind: nkNullLit, line: tok.line, col: tok.col)
|
||||
of tkAlter:
|
||||
if p.pos + 1 < p.tokens.len and p.tokens[p.pos + 1].kind == tkTable:
|
||||
p.parseAlterTable()
|
||||
else:
|
||||
let tok = p.advance()
|
||||
Node(kind: nkNullLit, line: tok.line, col: tok.col)
|
||||
of tkBegin: p.parseBeginTxn()
|
||||
of tkCommit: p.parseCommitTxn()
|
||||
of tkRollback: p.parseRollbackTxn()
|
||||
of tkExplain: p.parseExplain()
|
||||
else:
|
||||
let tok = p.advance()
|
||||
Node(kind: nkNullLit, line: tok.line, col: tok.col)
|
||||
|
||||
Reference in New Issue
Block a user