mirrors/Nim
1
0
Fork 0
mirror of https://github.com/nim-lang/Nim.git synced 2025-12-30 09:54:49 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge branch 'master' of github.com:Araq/Nimrod

Browse Source
This commit is contained in:
Araq
2012-11-25 11:03:27 +01:00
parent ccd2934e4a 012a7b5522
commit 2a2f41ee98
3 changed files with 21 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
lib/impure/db_mysql.nim
View File

@@ -14,7 +14,8 @@ import strutils, mysql
type
TDbConn* = PMySQL ## encapsulates a database connection
TRow* = seq[string] ## a row of a dataset
TRow* = seq[string] ## a row of a dataset. NULL database values will be
## transformed always to the empty string.
EDb* = object of EIO ## exception that is raised if a database error occurs
TSqlQuery* = distinct string ## an SQL query string
@@ -111,7 +112,8 @@ iterator FastRows*(db: TDbConn, query: TSqlQuery,
proc getRow*(db: TDbConn, query: TSqlQuery,
args: varargs[string, `$`]): TRow {.tags: [FReadDB].} =
## retrieves a single row.
## retrieves a single row. If the query doesn't return any rows, this proc
## will return a TRow with empty strings for each column.
rawExec(db, query, args)
var sqlres = mysql.UseResult(db)
if sqlres != nil:
@@ -150,9 +152,9 @@ iterator Rows*(db: TDbConn, query: TSqlQuery,
proc GetValue*(db: TDbConn, query: TSqlQuery,
args: varargs[string, `$`]): string {.tags: [FReadDB].} =
## executes the query and returns the result dataset's the first column
## of the first row. Returns "" if the dataset contains no rows. This uses
## `FastRows`, so it inherits its fragile behaviour.
## executes the query and returns the first column of the first row of the
## result dataset. Returns "" if the dataset contains no rows or the database
## value is NULL.
result = ""
for row in FastRows(db, query, args):
result = row[0]

11
lib/impure/db_postgres.nim
View File

@@ -14,7 +14,8 @@ import strutils, postgres
type
TDbConn* = PPGconn ## encapsulates a database connection
TRow* = seq[string] ## a row of a dataset
TRow* = seq[string] ## a row of a dataset. NULL database values will be
## transformed always to the empty string.
EDb* = object of EIO ## exception that is raised if a database error occurs
TSqlQuery* = distinct string ## an SQL query string
@@ -110,7 +111,8 @@ iterator FastRows*(db: TDbConn, query: TSqlQuery,
proc getRow*(db: TDbConn, query: TSqlQuery,
args: varargs[string, `$`]): TRow {.tags: [FReadDB].} =
## retrieves a single row.
## retrieves a single row. If the query doesn't return any rows, this proc
## will return a TRow with empty strings for each column.
var res = setupQuery(db, query, args)
var L = PQnfields(res)
result = newRow(L)
@@ -131,8 +133,9 @@ iterator Rows*(db: TDbConn, query: TSqlQuery,
proc GetValue*(db: TDbConn, query: TSqlQuery,
args: varargs[string, `$`]): string {.tags: [FReadDB].} =
## executes the query and returns the result dataset's the first column
## of the first row. Returns "" if the dataset contains no rows.
## executes the query and returns the first column of the first row of the
## result dataset. Returns "" if the dataset contains no rows or the database
## value is NULL.
var x = PQgetvalue(setupQuery(db, query, args), 0, 0)
result = if isNil(x): "" else: $x

11
lib/impure/db_sqlite.nim
View File

@@ -14,7 +14,8 @@ import strutils, sqlite3
type
TDbConn* = PSqlite3 ## encapsulates a database connection
TRow* = seq[string] ## a row of a dataset
TRow* = seq[string] ## a row of a dataset. NULL database values will be
## transformed always to the empty string.
EDb* = object of EIO ## exception that is raised if a database error occurs
TSqlQuery* = distinct string ## an SQL query string
@@ -108,7 +109,8 @@ iterator FastRows*(db: TDbConn, query: TSqlQuery,
proc getRow*(db: TDbConn, query: TSqlQuery,
args: varargs[string, `$`]): TRow {.tags: [FReadDB].} =
## retrieves a single row.
## retrieves a single row. If the query doesn't return any rows, this proc
## will return a TRow with empty strings for each column.
var stmt = setupQuery(db, query, args)
var L = (columnCount(stmt))
result = newRow(L)
@@ -130,8 +132,9 @@ iterator Rows*(db: TDbConn, query: TSqlQuery,
proc GetValue*(db: TDbConn, query: TSqlQuery,
args: varargs[string, `$`]): string {.tags: [FReadDB].} =
## executes the query and returns the result dataset's the first column
## of the first row. Returns "" if the dataset contains no rows.
## executes the query and returns the first column of the first row of the
## result dataset. Returns "" if the dataset contains no rows or the database
## value is NULL.
var stmt = setupQuery(db, query, args)
if step(stmt) == SQLITE_ROW:
let cb = column_bytes(stmt, 0)