Index char limit error
----------------------
Key: CORE-5752
URL: http://tracker.firebirdsql.org/browse/CORE-5752
Project: Firebird Core
Issue Type: Bug
Components: Charsets/Collation
Affects Versions: 3.0.3
Environment: Windows
Reporter: Reydy Valentin
When I want to create a index with two varchar(205) in utf8, firebird give me a
error (key size exceeds implementation restriction for index).
But according to the documentation, normally the limit is 509 from this compute
: (PAGE_SIZE / 4 - 9) / BYTES_PER_CHARSET.
And for my is (8192 / 4 - 9) / 4 = 509 (Same the doc)
Exemple script for test this issue
-- Basic table
CREATE TABLE "table" (
"id" INTEGER NOT NULL,
"fname" VARCHAR(205) NOT NULL,
"lname" VARCHAR(205) NOT NULL,
"fname2" VARCHAR(204) NOT NULL,
"lname2" VARCHAR(204) NOT NULL
);
CREATE INDEX "idx_table_test1" ON "table" ("fname", "lname"); -- 410 : Fail
CREATE INDEX "idx_table_test2" ON "table" ("fname", "lname2"); -- 409 : Fail
CREATE INDEX "idx_table_test3" ON "table" ("fname2", "lname2"); -- 408 : Work
Why ?
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