https://github.com/joeyshi12/pql-parser

Plot query language parser library
https://github.com/joeyshi12/pql-parser

ast node npm-package parser pql

Last synced: 5 months ago
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Plot query language parser library

• Host: GitHub
• URL: https://github.com/joeyshi12/pql-parser
• Owner: joeyshi12
• License: mit
• Created: 2024-03-16T20:36:54.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2024-12-03T00:38:42.000Z (over 1 year ago)
• Last Synced: 2025-12-02T02:49:23.273Z (7 months ago)
• Topics: ast, node, npm-package, parser, pql
• Language: TypeScript
• Homepage: https://www.npmjs.com/package/pql-parser?activeTab=readme
• Size: 413 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# pql-parser

![node.js.yml](https://github.com/joeyshi12/pql-parser/actions/workflows/node.js.yml/badge.svg)

![npm-publish.yml](https://github.com/joeyshi12/pql-parser/actions/workflows/npm-publish.yml/badge.svg)

![npm](https://img.shields.io/npm/v/pql-parser.svg)

Plot query language parser.

A 2D plot generation tool made with this parser is hosted at https://devtools.joeyshi.xyz/pql_compiler.

## Syntax

```

PLOT (BAR(category_column, value_column) | LINE(x_column, y_column) | SCATTER(x_column, y_column))

[WHERE ]

[GROUP BY ]

[HAVING ]

[LIMIT  [OFFSET ]]

```

## EBNF

```

 ::= "PLOT"  [] [] [] []

 ::=  |  | 

 ::= "BAR" "("  ","  ")"

 ::= "LINE" "("  ","  ")"

 ::= "SCATTER" "("  ","  ")"

 ::= "WHERE" 

 ::= "GROUP BY" 

 ::= "HAVING" 

 ::= "LIMIT"  ["OFFSET" ]

 ::= "OR" | "AND"

 ::=  ["AS" ]

 ::=  "("  ")" | 

 ::= "MIN" | "MAX" | "AVG" | "COUNT" | "SUM"

 ::=  {  |  | "_" }

 ::=  { "OR"  } |  { "AND"  }

 ::=    | "("  ")"

 ::=  { "OR"  } |  { "AND"  }

 ::=    | "("  ")"

 ::= ">" | "<" | ">=" | "<=" | "="

 ::=  |  | "NULL"

 ::=  {}

 ::= "'"  {} "'"

 ::= "0" | ... | "9"

 ::= "A" | ... | "Z" | "a" | ... | "z"

```