pure/parsesql

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The parsesql module implements a high performance SQL file parser. It parses PostgreSQL syntax and the SQL ANSI standard.

Unstable API.

Types

SqlLexer = object of BaseLexer
  filename: string
the parser object.   Source   Edit
SqlNode = ref SqlNodeObj
an SQL abstract syntax tree node   Source   Edit
SqlNodeKind = enum
  nkNone, nkIdent, nkQuotedIdent, nkStringLit, nkBitStringLit, nkHexStringLit,
  nkIntegerLit, nkNumericLit, nkPrimaryKey, nkForeignKey, nkNotNull, nkNull,
  nkStmtList, nkDot, nkDotDot, nkPrefix, nkInfix, nkCall, nkPrGroup,
  nkColumnReference, nkReferences, nkDefault, nkCheck, nkConstraint, nkUnique,
  nkIdentity, nkColumnDef,  ## name, datatype, constraints
  nkInsert, nkUpdate, nkDelete, nkSelect, nkSelectDistinct, nkSelectColumns,
  nkSelectPair, nkAsgn, nkFrom, nkFromItemPair, nkGroup, nkLimit, nkHaving,
  nkOrder, nkJoin, nkDesc, nkUnion, nkIntersect, nkExcept, nkColumnList,
  nkValueList, nkWhere, nkCreateTable, nkCreateTableIfNotExists, nkCreateType,
  nkCreateTypeIfNotExists, nkCreateIndex, nkCreateIndexIfNotExists, nkEnumDef
kind of SQL abstract syntax tree   Source   Edit
SqlNodeObj = object
  case kind*: SqlNodeKind    ## kind of syntax tree
  of LiteralNodes:
      strVal*: string        ## AST leaf: the identifier, numeric literal
                             ## string literal, etc.
    
  else:
      sons*: seq[SqlNode]    ## the node's children
    
  
an SQL abstract syntax tree node   Source   Edit
SqlParseError = object of ValueError
Invalid SQL encountered   Source   Edit
SqlParser = object of SqlLexer
  tok: Token
SQL parser object   Source   Edit

Procs

proc `$`(n: SqlNode): string {....raises: [Exception], tags: [RootEffect].}
an alias for renderSQL.   Source   Edit
proc `[]`(n: SqlNode; i: BackwardsIndex): SqlNode {....raises: [], tags: [].}
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proc `[]`(n: SqlNode; i: int): SqlNode {....raises: [], tags: [].}
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proc add(father, n: SqlNode) {....raises: [], tags: [].}
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proc len(n: SqlNode): int {....raises: [], tags: [].}
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proc newNode(k: SqlNodeKind): SqlNode {....raises: [], tags: [].}
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proc newNode(k: SqlNodeKind; s: string): SqlNode {....raises: [], tags: [].}
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proc newNode(k: SqlNodeKind; sons: seq[SqlNode]): SqlNode {....raises: [], tags: [].}
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proc parseSQL(input: Stream; filename: string): SqlNode {....raises: [IOError,
    OSError, IOError, OSError, ValueError, SqlParseError, Exception],
    tags: [ReadIOEffect, RootEffect, WriteIOEffect].}
parses the SQL from input into an AST and returns the AST. filename is only used for error messages. Syntax errors raise an SqlParseError exception.   Source   Edit
proc parseSQL(input: string; filename = ""): SqlNode {.
    ...raises: [IOError, OSError, ValueError, SqlParseError, Exception],
    tags: [ReadIOEffect, RootEffect, WriteIOEffect].}
parses the SQL from input into an AST and returns the AST. filename is only used for error messages. Syntax errors raise an SqlParseError exception.   Source   Edit
proc renderSQL(n: SqlNode; upperCase = false): string {....raises: [Exception],
    tags: [RootEffect].}
Converts an SQL abstract syntax tree to its string representation.   Source   Edit
proc treeRepr(s: SqlNode): string {....raises: [], tags: [].}
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