Python (re)

SQL SELECT Statement in PY

Match the column list and table name from a SQL SELECT ... FROM statement.

Try it in the PY tester →

Pattern

regexPY
SELECT\s+(.+?)\s+FROM\s+([\w."`\[\]]+)   (flags: gis)

Python (re) code

pyPython
import re

pattern = re.compile(r"SELECT\\s+(.+?)\\s+FROM\\s+([\\w.\"`\\[\\]]+)", re.IGNORECASE | re.DOTALL)
input_text = "SELECT id, name FROM users"
for m in pattern.finditer(input_text):
    print(m.group(0))

Stdlib `re` module — no third-party dependency. Works on Python 3.6+.

How the pattern works

SELECT\s+ matches the keyword and required whitespace. (.+?) lazily captures the column list. \s+FROM\s+ matches the FROM keyword. ([\w."`\[\]]+) captures the table identifier including dots (db.schema.table), and the three quoting styles SQL dialects use: "double", `backtick`, [bracket]. Flags: g (global), i (case-insensitive SELECT/FROM), s (dotAll so columns can span newlines).

Examples

Input

SELECT id, name FROM users

Matches

  • SELECT id, name FROM users

Input

select * from `orders`

Matches

  • select * from `orders`

Input

INSERT INTO logs

No match

Same pattern, other engines

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