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Explicit test of presence of SQLite math functions

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We cannot count on version numbers to determine if SQLite has math
functions because the sqlite3 library may or may not have been
compiled with the DSQLITE_ENABLE_MATH_FUNCTIONS option.

This commit explicitly tests for the presence of math functions.
This commit is contained in:
Tom Keffer
2022-11-18 11:39:11 -08:00
parent 311619de79
commit ba3e807a27
1 changed files with 10 additions and 2 deletions
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12
bin/weedb/sqlite.py
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@@ -16,8 +16,16 @@ if not hasattr(sqlite3.Connection, "__exit__"): # @UndefinedVariable
del sqlite3
from pysqlite2 import dbapi2 as sqlite3 # @Reimport @UnresolvedImport
sqlite_version = sqlite3.sqlite_version
has_math = sqlite_version >= '3.35.0'
# Test to see whether this version of SQLite has math functions. An explicit test is required
# (rather than just check version numbers) because the SQLite library may or may not have been
# compiled with the DSQLITE_ENABLE_MATH_FUNCTIONS option.
try:
with sqlite3.connect(":memory:") as conn:
conn.execute("SELECT RADIANS(0.0), SIN(0.0), COS(0.0);")
except sqlite3.OperationalError:
has_math = False
else:
has_math = True
import weedb
from weeutil.weeutil import to_int, to_bool