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util.sql: Ignore if tables and indices already exist on creation (fixes #1064)

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Tested with SQLite3 3.16.2 and 3.27.2 and Postgres 11.

MySQL does not support IF NOT EXISTS for indices so not handled here.
This commit is contained in:
Kim Alvefur 2019-05-30 23:50:28 +02:00
parent cabd5216b4
commit c2576aea62
1 changed files with 6 additions and 0 deletions
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6
util/sql.lua
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@ -238,6 +238,9 @@ function engine:transaction(...)
end
function engine:_create_index(index)
local sql = "CREATE INDEX \""..index.name.."\" ON \""..index.table.."\" (";
if self.params.driver ~= "MySQL" then
sql = sql:gsub("^CREATE INDEX", "%1 IF NOT EXISTS");
end
for i=1,#index do
sql = sql.."\""..index[i].."\"";
if i ~= #index then sql = sql..", "; end
@ -256,6 +259,9 @@ function engine:_create_index(index)
end
function engine:_create_table(table)
local sql = "CREATE TABLE \""..table.name.."\" (";
do
sql = sql:gsub("^CREATE TABLE", "%1 IF NOT EXISTS");
end
for i,col in ipairs(table.c) do
local col_type = col.type;
if col_type == "MEDIUMTEXT" and self.params.driver ~= "MySQL" then