Add conn session vars

[recall704]

What problem does this PR solve?

fix resetDBWithSessionParams if value is int or float

What is changed and how it works?

try to parse params values string to int or float.

[lichunzhu]

@recall704 What's the difference between this and params introduced in #111 and #167?

[recall704]

#!/bin/bash

HOST="127.0.0.1"
PORT=3306
USER="root"
PSW="mypasswd"
DATA_DIR="data2"

rm rf -$DATA_DIR && mkdir -p $DATA_DIR

./bin/dumpling \
    --host=$HOST \
    --port=$PORT \
    --user=$USER \
    --password=$PSW \
    --logfmt=json \
    --loglevel=debug \
    --filter="*.*,!/^(mysql|sys|grafana_ucloud|INFORMATION_SCHEMA|PERFORMANCE_SCHEMA|METRICS_SCHEMA|INSPECTION_SCHEMA)$/.*" \
    --threads=16 \
    --status-addr=:8281 \
    --output=$DATA_DIR \
    --filetype=sql \
    --rows=100000 \
    --params="net_read_timeout=86400,interactive_timeout=28800,wait_timeout=2147483,net_write_timeout=86400" \
    --tidb-mem-quota-query=35433480192

the erorr is

dump failed: Error 1232: Incorrect argument type to variable 'wait_timeout'

you set the session vars with db.ExecContext,

		s := fmt.Sprintf("SET SESSION %s = ?", k)
		_, err := db.ExecContext(tctx, s, v)

and i set the session vars with conn.ExecContext

		query := fmt.Sprintf("SET SESSION %s = %s", k, s)
		_, err := conn.ExecContext(tctx, query)

[lichunzhu]

#!/bin/bash

HOST="127.0.0.1"
PORT=3306
USER="root"
PSW="mypasswd"
DATA_DIR="data2"

rm rf -$DATA_DIR && mkdir -p $DATA_DIR

./bin/dumpling \
    --host=$HOST \
    --port=$PORT \
    --user=$USER \
    --password=$PSW \
    --logfmt=json \
    --loglevel=debug \
    --filter="*.*,!/^(mysql|sys|grafana_ucloud|INFORMATION_SCHEMA|PERFORMANCE_SCHEMA|METRICS_SCHEMA|INSPECTION_SCHEMA)$/.*" \
    --threads=16 \
    --status-addr=:8281 \
    --output=$DATA_DIR \
    --filetype=sql \
    --rows=100000 \
    --params="net_read_timeout=86400,interactive_timeout=28800,wait_timeout=2147483,net_write_timeout=86400" \
    --tidb-mem-quota-query=35433480192

the erorr is

dump failed: Error 1232: Incorrect argument type to variable 'wait_timeout'

you set the session vars with db.ExecContext,

		s := fmt.Sprintf("SET SESSION %s = ?", k)
		_, err := db.ExecContext(tctx, s, v)

and i set the session vars with conn.ExecContext

		query := fmt.Sprintf("SET SESSION %s = %s", k, s)
		_, err := conn.ExecContext(tctx, query)

Yes. dumpling will return an error. I think maybe fixing --params is enough. Could you please explain why do you want to add another argument --session-params?

[recall704]

#!/bin/bash

HOST="127.0.0.1"
PORT=3306
USER="root"
PSW="mypasswd"
DATA_DIR="data2"

rm rf -$DATA_DIR && mkdir -p $DATA_DIR

./bin/dumpling \
    --host=$HOST \
    --port=$PORT \
    --user=$USER \
    --password=$PSW \
    --logfmt=json \
    --loglevel=debug \
    --filter="*.*,!/^(mysql|sys|grafana_ucloud|INFORMATION_SCHEMA|PERFORMANCE_SCHEMA|METRICS_SCHEMA|INSPECTION_SCHEMA)$/.*" \
    --threads=16 \
    --status-addr=:8281 \
    --output=$DATA_DIR \
    --filetype=sql \
    --rows=100000 \
    --params="net_read_timeout=86400,interactive_timeout=28800,wait_timeout=2147483,net_write_timeout=86400" \
    --tidb-mem-quota-query=35433480192

the erorr is

dump failed: Error 1232: Incorrect argument type to variable 'wait_timeout'

you set the session vars with db.ExecContext,

		s := fmt.Sprintf("SET SESSION %s = ?", k)
		_, err := db.ExecContext(tctx, s, v)

and i set the session vars with conn.ExecContext

		query := fmt.Sprintf("SET SESSION %s = %s", k, s)
		_, err := conn.ExecContext(tctx, query)

Yes. dumpling will return an error. I think maybe fixing --params is enough. Could you please explain why do you want to add another argument --session-params?

OK, I will try to fix in --params

[recall704]

@lichunzhu It's works now

[lichunzhu]

/lgtm

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[lichunzhu]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 304f26c

[lichunzhu]

LGTM. Thanks for your contribution!