TABLE RENAME COLUMN even if they use collation-sequences or
user-defined-functions that are not available.
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DO UPDATE if that constraint is violated regardless of whether or not
other constraints are in violation. This aligns SQLite behavior with
what PostgreSQL does. Fix for ticket [908f001483982c43cdb476dfb590a1a].
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by OOMs and/or malformed parameters submitted by hostile application code.
Also add additional comments to the RENAME COLUMN logic.
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COLUMN code. Fix a memory leak in the sqlite_rename_column() SQL function.
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See the header comment on the program itself for further information.
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then also use quotes for the column name in the edited SQL statements.
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had been run on the database. Also prevent the user from renaming the columns
of system tables.
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schema for any tables for which parent key definitions were changed are
reloaded.
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it avoids signed/unsigned character comparisons, as that can lead to an
incorrect answer if the ESCAPE clause is an invalid UTF8 string. Problem
found by OSSFuzz.
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column is being coded as a constant, make sure the affinity is correct.
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a persistent source of bugs for years and with recent improvements
in the performance of OP_Column, it no longer provides a benefit. After
the column cache is removed, the binary is almost 2KB smaller and the
speed-check.sh performance test is over 3 million cycles faster.
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Provide an assert() to help prove that the testcase is no longer reachable.
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a prepared statement (the Parse.pConstExpr expressions) pass the
sqlite3ExprIsConstantNotJoin() test. It is not sufficient to pass just the
sqlite3ExprIsConstant() test as that would allow through column references
that are bound to constants by the WHERE clause in the constant propagation
optimization. This fixes a problem discovered by OSSFuzz.
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of bugs for many years. We recent enhancements to the performance of the
OP_Column opcode, the removing the column cache actually makes speed-check.sh
run faster. It also saves about 1,800 bytes of code space.
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